Kutsekera kwa ma bin ndi ngozi zamakina a PTO¶
Manambala angozi amasiyana malinga ndi dziko. Tsambali limagwiritsa ntchito 911, nambala ya United States ndi Canada. Mayiko ena ambiri amagwiritsa ntchito 112, 999, kapena nambala ina. Pezani nambala ya dziko lanu.
Malo osungira mbewu zaulimi, ma silos a forage, ndi ma tractor power take-off (PTO) ali pakati pa malo oopsa kwambiri padziko lonse lapansi. Chifukwa chakuti chimanga, tirigu, soya, ndi manyuchi amakhala ngati madzi ochulukirachulukira kwambiri pamene zotsitsa zikuthamanga, munthu wamkulu akaponda panjere yoyenda amakokedwa mpaka m’chiuno pasanathe masekondi asanu ndi kumizidwa mkati mwa masekondi 20. Njere ikafika pachifuwa, kugundana kofanana ndi koyima kwa maso kumapangitsa kuti minyewa ikhale yolimba kwambiri kuposa ma kilogalamu 400 mpaka 700 (mapaundi 900 mpaka 1,500), zomwe zimapangitsa kuti zikhale zosatheka kukoka wovulalayo ndi chingwe kwinaku akuphwanya nthiti yake molimba ndi mpweya uliwonse.
Momwemonso osakhululuka ndi ma shaft a thirakitala osatetezedwa (PTO) omwe amazungulira 540 kapena 1,000 revolutions pa mphindi imodzi (RPM) ndi nkhokwe zokhala m'danga zodzaza ndi poizoni wa nitrogen dioxide (\(NO_2\)) kapena mpweya wotulutsa mpweya woipa (\(CO_2\)). Pa 540 RPM, shaft ya PTO yozungulira imakulunga mamita 2.1 (mamita 7) a jekete ya wogwira ntchito kapena chingwe cha bootlace mozungulira chingwe chachitsulo mu sekondi imodzi yokha, zomwe zimayambitsa kudulidwa koopsa, scalping, kapena kuthyoka kwa msana. Podziwa momwe mungatsekere zotsitsa zotsitsa ndikuyatsa mafani otulutsa mpweya nthawi yomweyo, chifukwa chiyani opulumutsa sayenera kulumphira mu nkhokwe yambewu popanda chingwe chamoyo kapena kukoka munthu woikidwa m'manda ndi manja, momwe angachotsere injini ya thirakitala ya dizilo panthawi ya PTO, komanso momwe mungapewere kupha anthu ambiri pafamupo.
Chitani izi tsopano¶
- *Zimitsani mphesa yotsitsa tiriguyo nthawi yomweyo ndipo YANtsani chokupizira mpweya ngati wina watsekeredwa munjere. Osayesa kukokera munthu wokwiriridwa ndi chingwe; mphamvu yodulira mpaka pansi imayimitsa kukokera pansi nthawi yomweyo, kuyatsa chofanizira mpweya (chotenthetsera chozimitsa) chimawombetsa mpweya wabwino kupyola mu maso kuti munthu womira pansi apume.
- Osalumphira m'nkhokwe ya tirigu kapena kulowa m'nkhokwe yosuta/yothira mpweya wopanda chingwe chomangirira ndi zida zopumira. Oposa theka la anthu omwe amafa ndi nkhokwe yambewu ndi m'nkhokwe ndi opulumutsa omwe amathamangira kupulumutsa wachibale kapena wantchito mnzawo ndipo nthawi yomweyo amamizidwa ndi makoma akugwa kapena kukomoka m'masekondi pang'ono ndi mpweya wosawoneka.
- Zimitsani injini ya thirakitala kapena chotsani zowakira za PTO musanakhudze aliyense amene wakodwa mumzera woyendetsa galimoto. Kokani kokani kotsekera mafuta a dizilo, zimitsani kiyi yoyatsira, kapena sunthani cholozera cha PTO kuti chisalowerere m'malo, ndi kukantha mawilo a thirakitala; musayesere kugwira kapena kukoka wovulalayo kutali pamene kutsinde kukadali kutembenuka.
- Leave torn, tightly wrapped clothing on the PTO shaft and apply a tourniquet to severed limbs immediately. Cut the victim free from the twisted fabric using heavy shears or a utility knife without unwinding the shaft backward if doing so moves fractured bones, and apply a commercial tourniquet 5 to 7 centimeters (2 to 3 inches) above any traumatic amputation.
- Osatulutsa wovulalayo powuluka, mutu wa chimanga, kapena ma baler potembenuza mphamvu ya makinawo. Kutembenuza zogudubuza zaulimi zoyendetsedwa ndi mphamvu kapena ma auger kumayambitsa kuphwanyidwa ndi kung'ambika kwina; Tsekani kuyatsa kwa thirakitala ndikugwiritsa ntchito ma hydraulic Spreaders, ma jacks, kapena ma wrenches kuti muwononge nyumba yozungulira nthambiyo.
- Call emergency services immediately and specify "grain bin rescue tube" or "heavy machinery extrication" on the call. Rural volunteer fire departments need early notice to dispatch specialized grain rescue cofferdam tubes, vacuum grain trucks, and air ambulances; call your local emergency number (911 in the United States and Canada, 112 across the European Union, 999 in the United Kingdom) or check manambala angozi.
flowchart TD
Start["Farm Grain Bin, Silo, or PTO Machinery Emergency"] --> Type{"Ndi ngozi yanji yomwe ikuchitika?"}
Type -->|"Kutsekera kwa Grain Bin"| AugerOff["1. ZIMmitsa kutsitsa auger nthawi yomweyo<br/>2. YATSANI fani ya mpweya (chotenthetsera WOZIMA)<br/>3. Imbani 911/112/999 pa Grain Rescue Tube"]
Type -->|"PTO Shaft kapena Auger Entanglement"| PTOOff["1. Chotsani PTO ndikutseka injini ya thirakitala <br/>2. Osasintha makina oyendetsedwa ndi magetsi<br/>3. Ikani ma tourniquet pakutaya magazi kwambiri"]
Type -->|"Munthu Wogwa mu Silo kapena Dzenje la Manyowa"| GasStop["IMANI: Osalowa opanda paketi ya mpweya ya SCBA<br/>Yatsani chowuzira silo kapena dzenje lolowera mpweya<br/>Imbani 911 / 112 / 999 kwa Confined Space Rescue"]
AugerOff --> BuriedLevel{"Kodi mutu wa munthu wophedwayo udakali pamwamba pa tirigu?"}
BuriedLevel -->|"Inde: Chiuno kapena Chifuwa Chakuya"| Cofferdam["OSATI kukoka wovulalayo ndi zingwe<br/>Mapepala a plywood otsika kuti ayimepo<br/>Dikirani ozimitsa moto kuti ayike chubu cha cofferdam"]
BuriedLevel -->|"Ayi: Kumizidwa kwathunthu"| CutBin["Dulani mabowo ooneka ngati V mozungulira mozungulira makoma a zitsulo kuti mukhetse tirigu pomwe chokupiza chimawuzira mpweya"]
PTOOff --> Amputation{"Kodi chiwalo kapena manambala amadulidwa kwathunthu?"}
Amputation -->|"Yes"| SavePart["Yang'anirani chitsa chotuluka magazi ndi tourniquet, kulungani gawo lodulidwa ndi yopyapyala yopyapyala mkati mwa thumba la pulasitiki pa ayezi"]
Amputation -->|"Ayi"| Stabilize["Khazikitsani chitsulo chopachikidwa kapena nthambi yophwanyidwa m'malo mwake, alonda a makina osatsegula kapena nyumba mosamala"]
Fiziki ya kutsekeka kwa nkhokwe ya tirigu ndi chifukwa chake simungathe kukokera wovulalayo¶
Kuti mumvetsetse chifukwa chake kutsekeka kwambewu kumapha pakangotha masekondi angapo, muyenera kumvetsetsa makina amadzimadzi ndi kukangana kwa mbewu zosungidwa. Akayatsa chotsitsa chotsitsa pansi pa nkhokwe ya tirigu, mbewu sizigwera pansi mofanana ngati madzi akutuluka mubafa. M'malo mwake, njere zimayenda kuchokera ku pakatikati pakatikati molunjika kupyola pakati (kutuluka kwa funnel) kupita kuchipata chapansi cha sump pama liwiro a 1.5 mpaka 3 metres (5 mpaka 10 mapazi) pamphindi.
| Entrapment Scenario | Physical Mechanism | Nthawi Yoti Immobilization | Zofunika Extrication Force |
|---|---|---|---|
| Fayilo yambewu Yoyenda (Kutsitsa Auger Running) | Chigawo chapakati choyimirira cha tirigu chimatsikira pansi molunjika ku sump yotayira, kumachita ngati lamba wopita kumtunda wothamanga kwambiri. | ** 3 mpaka 5 masekondi ** mpaka kuzama kwa mawondo / m'chiuno (mfundo yopanda kuthawa); masekondi 15 mpaka 22 kuti maliro alowe m'manda | Kupitilira 1,500 Newtons (325 lbf) m'chiuno mwakuya; kupitirira 4,000 Newtons (900 lbf) pakuya pachifuwa; kupitilira 6,500 Newtons (1,500 lbf) atamira |
| Crust Bridge Kugwa (Hollow Cavity Underneath) | Mkate wambewu wa nkhungu kapena wonyowa kwambiri wolimba wa 10-to-30-cm (4-to-12-inchi) pamene kutsitsa m'mbuyomu kwakhuthula mphanga yaikulu pansi. | Kugwa kwachangu nthawi yomweyo wogwira ntchito atuluka pamtambo ndikumeta, kutsatiridwa ndi makoma ozungulira. | Wozunzidwayo amaikidwa m'manda nthawi yomweyo 1 mpaka 3 mamita (3 mpaka 10 mapazi) pansi pa cone; imafuna chubu la cofferdam kapena bin-wall V-kucheka kunja |
| Chigumula cha Vertical Grain Wall | Mbewu zowonongeka zimayima pathanthwe loyima mpaka mamita 6 (mamita 20) utali mkati mwa nkhokwe pamene wogwira ntchito akugwedeza pansi ndi chitoliro kapena fosholo. | Mphindi 1 mpaka 2: Khoma lolowera pansi limameta ndikukwirira wogwira ntchito pansi pa bini pansi pa matani ambewu. | Kuphwanya kwakukulu ndi kulemera kwa asphyxiation; chiopsezo chachikulu cha kugwa kwa khoma lachiwiri pa opulumutsa |
N’chifukwa chiyani kukokera munthu wogwidwa ndi chingwe n’koopsa¶
Munthu akakwiriridwa tirigu m’chiuno kapena m’chifuwa, antchito anzake a zolinga zabwino kaŵirikaŵiri amamuponyera lamba kapena chingwe chomangirira pa thirakitala kapena m’chitukuko ndi kuyesa kuwakoka molunjika. Osayesa konse kutulutsa munthu wokwiriridwa mumbewu.
- Kutsekera kwa granular ndi kukangana: Njere zouma zimalemera pafupifupi ma kilogalamu 750 pa kiyubiki mita (mapaundi 47 pa kiyubiki futi, kapena mapaundi 56 mpaka 60 pa busheli ya chimanga ndi tirigu). Mtembo wokwiriridwa ukakokera m'mwamba, maso ozungulirawo amakhomerera pamodzi molunjika ku nsapato, mawondo, chiuno, ndi zovala za munthuyo.
- Kupatukana kwa msana ndi mafupa: Kutulutsa tirigu wofika m'chiuno kumafuna mphamvu yopitilira ma kilogalamu 400 (900 pounds), pomwe munthu wamkulu wokwiriridwa kwathunthu amafunikira mphamvu yopitilira 680 kilograms (1,500 pounds) yamphamvu. Msana wa munthu ndi mfundo za mapewa zimawonongeka mowopsa, kugwedezeka kwa minyewa, ndi kupatukana pa mphamvu zocheperapo mphamvu yofunika kuthana ndi kugundana kwambewu.
- Kupuma koletsa kupuma: Nthawi iliyonse munthu akakwirira mozama pachifuwa ndi mpweya wa tirigu, nthiti yake imatsika ndi masentimita 2 mpaka 3 (inchi imodzi), ndipo njere yozungulira ngati madzimadzi yozungulira imalowa m'kati mwake ndikudzaza malo aang'onowo. Wovulalayo akamakoka mpweya, njere yokhomayo siingathe kukankhira kunja ndi minofu ya m’khosi. M'mphindi zochepa, wovulalayo amakomoka chifukwa cha kukanikizidwa pachifuwa (traumatic asphyxia) ngakhale mutu wake uli pamwamba pa njere.
Danger
Musalole aliyense kuti ayende mkati mwa nkhokwe pamene chotsitsa chikuthamanga, ndipo musalowe mu nkhokwe kuti muthyole njere zomangika kapena zokhuthala mkati. Ngati njere zasiya kutuluka m'nthaka pamene nkhokweyo ikadali ndi njere mkati, pali mlatho wopanda kanthu; igwetseni kuchokera padenga lakunja lokha pogwiritsa ntchito mtengo wautali wa fiberglass mutavala zingwe zomangirira.
Kuyankha kwadzidzidzi kwapang'onopang'ono pakutsekeredwa kwa nkhokwe ya tirigu¶
Ngati mutapeza munthu atatsekeredwa kapena kukwiriridwa mu nkhokwe ya tirigu, ngolo yokoka, kapena nyumba yosungiramo zinthu zathyathyathya, chitani izi motsatira ndondomeko yake.
1. Ngati ndiwe munthu womira m’njere (kudzipulumutsa)¶
Ngati muli m'nkhokwe ndipo njerezo zimagwera pansi pa mapazi anu mwadzidzidzi:
- Osayesa kuyenda kapena kukwera mmwamba pakati pa bini: Pakatikati pa binyo ndi pakatikati pa nkhokwe yoyimirira yothamanga kwambiri. Yendani nthawi yomweyo ku pakhoma lamalata, pomwe njereyo imayima mpaka fayilo yapakati itakula.
- Ngati mwakokedwa pakati pa kondomu ndipo simungathe kufika kukhoma: Igwetseni pansi pamsana kapena m'mimba nthawi yomweyo kuti mutambasule malo anu (chipale chofewa) miyendo yanu isanamire molunjika mu faniyo.
- Ngati mukukokedwa kwathunthu pansi pa njere: Pumirani mozama, **wolozani manja anu pachifuwa chanu kuti mupatse nthiti yanu malo okulirapo **, ndipo kapuni manja anu onse mwamphamvu pamphuno ndi pakamwa panu (kapena kukoka kolala ya malaya anu kapena kapu pa nkhope yanu). Chimanga chouma kapena tirigu amakhala ndi mpweya wokwanira 35 mpaka 40 peresenti wopanda mpweya pakati pa maso; kukankhira manja anu kutsogolo kwa pakamwa kumalepheretsa maso anu kuti asalowe mumphepo yamkuntho (bronchial aspiration) kotero mutha kupuma mpweya womwe uli pakati pa maso pamene opulumutsa akudula nkhokweyo.
2. Zochita nthawi yomweyo kwa anthu omwe ali kunja kwa bini¶
- Zimitsani zida zonse zotsitsa, zotengera, ndi zitseko za mphamvu yokoka nthawi yomweyo: Ponyani cholumikizira chachikulu chamagetsi m'munsi mwa bin kapena kutseka thirakitala PTO ikuyendetsa sesa. Kuletsa kutuluka kwa njere kumayimitsa kutsika pansi nthawi yomweyo.
- YANtsani chokupizira mpweya / chowumitsa (chowotchera/chotenthetsera WOZIMITSA): Sekondi iliyonse imawerengera munthu woikidwa m'manda yemwe akuzimitsidwa ndi njere zofunda, zafumbi. Kuyatsa mpweya wapansi kumapangitsa kuti mpweya uzizizira, wabwino wakunja wopita m'mwamba kudzera m'mbiya yopindika komanso kudutsa pakati pa maso, kuziziritsa wovulalayo ndikuchotsa mpweya woipa kuchokera kumaso. Tsimikizirani kuti chowotchera cha propane kapena gasi chazimitsidwa kuti musawuzire mpweya wotentha kwambiri mu nkhokwe.
- Imbani 911, 112, kapena 999 nthawi yomweyo: Nenani momveka bwino kuti: "Tili ndi munthu wotsekeredwa mu nkhokwe ya tirigu pa [adiresi], kukula kwa binyo ndi [X] matani/matani, tikufuna Fire Department Grain Rescue Tube and Confined Space Team."
- ** Tsekani ndi kutulutsa ma switch switch:** Ikani loko pa choboolera magetsi kapena muyime munthu kutsogolo kwa gulu lowongolera kuti pasapezeke wogwira ntchito amene angayatsenso mwangozi.
- Reassure the victim if their head is visible and stabilize the grain slope:
- Uzani wozunzidwayo kuti akhale chete, azipuma pang'onopang'ono ndi chifuwa chake chapamwamba, ndipo musavutike, chifukwa kugwedeza kumawapangitsa kuti amire mozama ndipo kumapangitsa kuti timbewu tating'ono tozungulira tigwere pamutu pake.
- Ngati wovulazidwayo amizidwa pakati pa nsonga yopindika yomwe ili ndi makoma otsetsereka a tirigu pamwamba pamutu pawo, ** musamayende pansi pamtunda wa tirigu **, zomwe zidzayambitsa chigumukire chomwe chimakwirira nkhope zawo.
- Only if a rescuer is wearing a full-body harness attached to an overhead lifeline with zero slack, and is standing on wide plywood sheets or a horizontal roof ladder laid across the grain surface to distribute weight, should they pass a dust mask, safety glasses, or oxygen mask to the victim.
3. Cofferdam rescue chubu vs. Kudula makoma a nkhokwe ya tirigu¶
Ozimitsa moto amagwiritsa ntchito njira ziwiri zazikuluzikulu za uinjiniya kuti atulutse munthu yemwe wagwidwa ndi tirigu kutengera ngati mutu wa wovulalayo ukuwoneka pamwamba pa njerezo:
- Njira A: Wozunzidwayo amaikidwa m'manda pang'ono (mutu ukuwoneka) -> Gwiritsani Ntchito Grain Rescue Tube (Cofferdam):
- Rescuers standing on plywood working platforms push interlocking curved aluminum or high-density polyethylene panels vertically down into the grain in a circle completely surrounding the victim.
- Once the cylinder is locked around the victim, rescuers use a portable mini-auger (powered by a cordless drill), a high-powered grain vacuum truck, or coffee cans/buckets to scoop out the grain only from the inside of the tube.
- As the grain inside the tube is removed, the tube is pushed deeper until the pressure on the victim's chest and legs is relieved and they can climb up a ladder placed inside the cylinder.
- Method B: Victim is completely submerged (head below grain) -> Cut the steel bin walls:
- When a victim is completely buried under meters of grain and cannot be seen, digging from the top takes too long. Instead, firefighters cut open the exterior corrugated steel walls of the bin using rescue circular saws with metal-cutting blades or reciprocating saws (never oxy-acetylene torches, which ignite explosive grain dust).
- Critical engineering rule for cutting bin walls: Never cut one single huge hole on one side of a grain bin. Draining thousands of tons of grain out of a single side opening creates massive eccentric lateral loading that buckles the steel bin walls and pulls the entire bin roof down onto the victim and rescuers.
- Instead, rescuers cut 4 to 6 symmetrical V-shaped or triangular relief flaps evenly spaced around the entire 360-degree circumference of the bin (at the 12, 2, 4, 6, 8, and 10 o'clock positions), located just below the estimated height of the buried victim, allowing the grain to flow out evenly onto the ground around the bin until the victim is uncovered.
4. Medical care after grain bin extrication¶
Once freed from the grain, the victim requires immediate trauma and critical-care evaluation:
- Airway clearance: Check the mouth and throat for corn kernels, soybean hulls, and dense organic dust. Suction the airway and administer high-flow humidified oxygen. Even if the victim appears alert initially, inhaled organic grain dust and fungal spores can cause delayed acute chemical pneumonitis, severe asthma-like bronchospasm, or Farmer's Lung hours later.
- Prevent post-extrication collapse (crush/compartment syndrome and orthostatic shock): For the duration of the entrapment, the surrounding grain acted like a giant anti-shock garment pressing blood out of the legs into the upper body. If you hoist a victim who has been buried for 30 to 90 minutes straight up vertically, blood pools instantaneously into their dilated leg veins while potassium and lactic acid flush into the heart, causing sudden cardiac arrest (rescue death). Keep the victim horizontal as soon as their legs are freed, start intravenous fluids before complete decompression if paramedics are inside the bin, and treat for hypothermia or heat illness depending on bin temperature.
Silo gas (\(NO_2\)) and manure pit (\(H_2S\)) confined-space emergencies¶
Tower silos filled with freshly chopped green corn, sorghum, alfalfa, or oats, as well as underground livestock manure pits, generate invisible, lethal gases that kill farmers and entire families of would-be rescuers in minutes.
| Confined Space Gas | Chemical Formula and Physical Properties | Peak Danger Window | Mechanism of Toxicity and Symptoms |
|---|---|---|---|
| Nitrogen Dioxide (Silo Gas) | \(NO_2\): Heavier than air (specific gravity 1.58); forms a yellowish-brown or reddish haze with a pungent, bleach-like odor; settles in silo chutes and low feed rooms | First 12 hours to 3 weeks after filling a tower silo with chopped green silage (peaks at 24 to 72 hours) | Reacts with moisture in the lungs to form corrosive nitric acid (\(HNO_3\)); burns alveoli, causing coughing, chest tightness, and delayed fatal pulmonary edema 4 to 30 hours after exposure |
| Carbon Dioxide (Fermentation Gas) | \(CO_2\): Colorless, odorless, heavier than air (specific gravity 1.52); forms a deep invisible pool on top of silage or grain | maola 12 mpaka milungu ingapo mutatha kudyetsera zobiriwira, kapena m'mbiya zambewu zonyowa kwambiri ndi mbiya zowotchera. | Simple asphyxiant: Displaces oxygen (\(O_2\)) below 10 percent; causes rapid gasping, dizziness, loss of consciousness within 30 to 60 seconds, and hypoxic death |
| Hydrogen Sulfide (Manure Pit Sewer Gas) | \(H_2S\): Zopanda mtundu, zolemera kuposa mpweya (kukoka kwapadera 1.19); amanunkhiza ngati mazira ovunda otsika, koma ** amalepheretsa kununkhira nthawi yomweyo kuposa 100 ppm ** | Immediately when agitating or pumping liquid swine or dairy manure pits | Ma cell asphyxiant: Amatchinga cytochrome c oxidase mu mitochondria; pamwamba pa 500 mpaka 1,000 ppm, kupuma kamodzi kamodzi ("kugogoda") kumayambitsa kukomoka nthawi yomweyo, kupuma pang'ono, ndi imfa |
| Methane | \(CH_4\): Colorless, odorless, lighter than air (specific gravity 0.55); rises to the top of enclosed manure pit ceilings | Continuous accumulation in unventilated covered manure tanks | Explosive flammable gas (at 5 to 15 percent concentration in air) and simple asphyxiant at high concentrations |
How to prevent and respond to silo gas emergencies¶
- Stay completely out of a newly filled tower silo for the first 2 to 3 weeks: The highest concentrations of nitrogen dioxide (\(NO_2\)) gas occur during the first 48 to 72 hours after chopping green forage (especially drought-stressed corn or heavily fertilized crops with high nitrate levels).
- Look and smell before approaching the silo chute or feed room: Because \(NO_2\) is 1.58 times heavier than air, it pours down the vertical silo ladder chute like invisible water and pools on the floor of the attached barn or feed room. Look for a yellowish-brown or reddish mist hovering near the floor, yellow staining on silage or concrete, a sharp bleach-like smell, or dead birds, flies, or rodents lying at the base of the chute.
- Run the silo forage blower for at least 30 minutes before entering (if entry is unavoidable after 3 weeks): Keep the silo room doors and top roof hatch open, turn on the tractor-powered forage blower to pump massive volumes of fresh air up the fill pipe, and keep the blower running the entire time anyone is inside while wearing a multi-gas monitor.
- Never enter a silo or manure pit to rescue a collapsed person without Self-Contained Breathing Apparatus (SCBA): A paper dust mask or cartridge respirator provides zero protection against oxygen deficiency, \(CO_2\), or high-concentration \(NO_2\) / \(H_2S\). If you see someone lying unconscious inside a silo or manure pit, stay outside, turn on the mechanical blower or ventilation fans from the outside, open exterior barn doors, and call 911, 112, or 999 for fire department SCBA rescue.
- Seek mandatory 48-hour hospital observation for anyone who inhales silo gas: Even if a farmer coughs after breathing a whiff of yellowish silo gas and feels completely normal 20 minutes later, the nitric acid formed inside their lungs continues destroying capillary walls silently. 6 to 30 hours later, while asleep in bed, the victim's lungs can suddenly fill with fluid (acute flash pulmonary edema), causing fatal suffocation. Anyone exposed to silo gas must go to an emergency room immediately for corticosteroid therapy and observation.
Tractor PTO, auger, and baler entanglement emergencies¶
The power take-off (PTO) stub shaft at the rear of a tractor transfers raw engine horsepower to rotary mowers, grain augers, manure spreaders, round balers, and post-hole diggers.
- 540 RPM shafts rotate 9 times every single second, wrapping 2.1 meters (7 feet) of clothing per second.
- 1,000 RPM shafts rotate 16.6 times every single second, wrapping 4 meters (13 feet) of clothing per second.
- Human reaction time to realize clothing has snagged and let go takes roughly 0.5 to 0.75 seconds. By the time your brain registers that a loose shoelace, hooded sweatshirt drawstring, frayed coverall cuff, or long hair has touched a spinning PTO shaft or universal joint knuckle, the shaft has already rotated 5 to 12 times and pulled your limb or body into the driveline.
Warning
Never step over a spinning PTO driveline or grain auger shaft to save a five-second walk around the tractor, and never reach across the rear of a tractor near the PTO stub to adjust the three-point hitch lever while the PTO is engaged. Even if the plastic tubular PTO master shield is in place, damaged bearings can allow the plastic shield to spin with the steel shaft, or a missing clevis pin guard can snag your pants leg instantly.
Step-by-step response to a PTO or machinery entanglement¶
- Shut down the tractor engine and PTO power immediately:
- Climb into the tractor cab (from the safe side away from the driveline) or reach the controls to move the PTO engagement lever/switch to OFF (Disengaged) and turn the ignition key to OFF.
- On older mechanical diesel tractors where turning the key only cuts battery charging without stopping the diesel fuel injection pump, pull the red mechanical Fuel Shutoff (Stop) knob all the way out and hold it until the diesel engine comes to a dead stop, or stall the engine by cutting the air intake.
- Set the tractor parking brake and place wooden blocks or rocks under the tractor tires so the machine cannot roll and rotate the driveline.
- Assess the victim for life-threatening arterial hemorrhage first:
- PTO entanglements frequently tear an arm or leg completely off at the shoulder, elbow, or knee, or cause catastrophic open fractures.
- If bright red blood is spurting or pooling rapidly from a mangled or amputated limb, apply a commercial windlass tourniquet (such as a CAT or SOFTT-W) 5 to 7 centimeters (2 to 3 inches) above the injury site (directly on the upper arm or thigh, never over a joint) and twist the windlass rod until all bleeding stops completely. Note the exact time of application on the victim's forehead.
- Never put the machine in reverse to "unwind" a trapped person:
- If a person's arm, leg, or torso is wrapped around a PTO shaft, pulled into a grain auger tube, or wedged between round baler rollers or corn-picker snapping rolls, never start the tractor or reverse the PTO/hydraulics to back them out. Powered reversal inflicts massive additional crushing, shearing, and arterial tearing.
- How to free a victim wrapped tightly to a PTO shaft:
- Often, a victim's coverall, jacket, or heavy denim pants are wound so tightly around the steel shaft that the fabric acts like a steel band pinning their body against the driveline.
- Cut the clothing away from the victim's body using trauma shears or a curved seat-belt cutter hook, leaving the tightly wound roll of cloth attached to the shaft rather than trying to unwind the victim's broken body around the bar.
- If a limb is wedged inside the universal joint yoke or auger flighting, wait for fire department heavy rescue crews to cut the steel shaft with hydraulic cutters or plasma/reciprocating saws while cooling the metal with water, or use sockets and wrenches to unbolt the telescoping PTO shaft halves from the tractor stub shaft so the shaft section can be transported with the patient if impaled.
- Preserve any amputated hand, arm, foot, or fingers properly:
- Once the victim is stabilized and bleeding is controlled, search the immediate ground or machinery housing for the severed body part (only after verifying the machine is 100 percent locked out).
- Tsukani dothi kapena mankhusu pang'onopang'ono pagawo lodulidwalo ndi saline wosabala kapena madzi aukhondo a m'mabotolo (osachapa).
- Mangani gawo lodulidwalo mu yopyapyala yopyapyala wonyowa ndi saline, isindikize mu thumba la pulasitiki lopanda madzi, ndikuyika thumba lomatalo mkati mwa chidebe chachiwiri chodzazidwa ndi ** ayezi wophwanyidwa ndi madzi **.
- Never place an amputated limb or finger directly onto bare ice or dry ice, and never submerge it directly in liquid water, as freezing destroys microvascular tissue and makes surgical replantation impossible. Send the cooled part in the same ambulance or helicopter with the patient.
Tip
Banja lililonse laulimi komanso ogwira ntchito zaulimi ayenera kukhala ndi zida zothandizira zovulala zomwe zimakhala ndi ma tourniquets awiri a windlass, hemostatic gauze, mavalidwe oponderezedwa, ndi masiketi ovulala omwe amayikidwa mkati mwa kabati iliyonse ya thirakitala ndikuphatikiza zokolola, ndikutengapo mbali Imitsani Kutaya magazi ndi maphunziro oyamba afamu kuchokera ku Red Cross, St John Ambulance, kapena kukulitsa chitetezo chaulimi mdera lanu.
Mafunso omwe amafunsidwa pafupipafupi¶
If someone is trapped waist-deep in a grain bin and the auger is already turned off, why can't we just tie a rope around their chest and pull them out with a hoist?
Mbewu zowuma zimakhoma molimba mozungulira nsapato, mawondo, ndi ziuno za munthu wokwiriridwa, zomwe zimachititsa kuti munthu asagwedezeke kwambiri. Kafukufuku wopangidwa ndi mapulogalamu aumisiri waulimi (monga pa Yunivesite ya Purdue ndi National Education Center for Agricultural Safety ku United States) akuwonetsa kuti kukokera munthu wamkulu wofika m'chiuno molunjika kuchokera munjere kumafuna mphamvu yopitilira ma kilogalamu 400 (900 pounds) yamphamvu, ndipo kukoka munthu wamkulu wofika pachifuwa kumafuna ma kilogalamu 680 (mapaundi 1,500). Kukokera m'mwamba kwambiri ndi chingwe kapena winchi kumangirira pachifuwa kuti atsimize wovulalayo kapena kuthyola msana ndi mapewa mapazi awo asanagwedezeke. M'malo mwake, opulumutsa ayenera kuyika chubu chopulumutsira tirigu (cofferdam) mozungulira wovulalayo ndikutulutsa njerezo mkati mwa chubu.
Why should you turn ON the grain bin aeration fan when someone is trapped in grain?
When a person is buried chest-deep or completely submerged in grain, they rapidly consume the limited oxygen trapped in the tiny spaces between the kernels around their face while exhaling carbon dioxide, and the surrounding grain traps intense body heat and dust. Switching on the bin's bottom aeration fan (while making sure the drying burner/heater is turned OFF) forces cool, fresh outside air upward through the perforated bin floor and through the grain mass, providing breathable oxygen and cooling the victim until firefighters cut open the bin or deploy a rescue tube.
Can I wear a cartridge respirator or N95 dust mask to go inside a newly filled silo or manure pit to rescue someone?
Ayi, musalowe m'nkhokwe yodzaza kumene ya forage kapena dzenje la manyowa mutavala chigoba cha N95 kapena chopumira chamankhwala. Masks oyeretsa mpweya amasefa tinthu tating'onoting'ono kapena mpweya wochepa wochokera mumpweya womwe uli kale ndi mpweya wabwino; sapereka mpweya. Mkati mwa nkhokwe ya mpweya kapena dzenje la manyowa, mpweya woipa ndi methane zimachotsa mpweya wopumira pansi pa milingo yopulumuka, pamene nitrogen dioxide ($NO_2$) ndi hydrogen sulfide ($H_2S$) amafika kuchulukira komwe kumachulukitsa makatiriji osefera nthawi yomweyo. Opulumutsa okhawo omwe amavala makina opumira amadzimadzi (SCBA) okhala ndi thanki yodziyimira payokha yopanikizidwa komanso cholumikizira chomangirira chomwe angalowemo.
N’chifukwa chiyani madokotala amaumirira kuti mlimi agone m’chipatala kwa maola 24 mpaka 48 atapuma pang’ono mpweya wachikasu wa silo, ngakhale atakhala bwino?
Silo gas is nitrogen dioxide ($NO_2$). When inhaled, nitrogen dioxide dissolves in the moist lining of the deep lung air sacs (alveoli) and converts into corrosive nitric acid. Often, the initial coughing and throat irritation subside within 15 minutes, tricking the farmer into going home. Over the next 6 to 30 hours, however, the chemical burn inside the lungs causes delayed, catastrophic fluid leakage (acute pulmonary edema) that can drown the patient in their own lung fluid in the middle of the night, and can cause permanent scarring called bronchiolitis obliterans if not treated early with hospital corticosteroids and oxygen.
Kodi ndingayimitse bwanji injini ya thirakitala ya dizilo panthawi yadzidzidzi ya PTO ngati kuyatsa kiyi yoyatsira kuti ZIMIMI sikuyimitsa injiniyo?
Unlike gasoline engines that require an electrical spark to run, many older and mechanical diesel farm tractors use compression ignition and a mechanical fuel injection pump that continues running even if the electrical ignition key is turned off or the battery cable is cut. To shut down a mechanical diesel tractor immediately, pull the red mechanical "Fuel Shutoff / Engine Stop" pull-knob on the dashboard all the way out and hold it until the flywheel stops turning, or move the hand throttle lever all the way past the idle detent into the fuel cut-off position, while simultaneously moving the PTO lever to the disengaged position.
What is the safest way to clear a plugged combine header, corn picker, or round baler in the field?
Before stepping out of the tractor or combine cab to inspect or clear a plugged header, auger, or baler intake, you must follow the mandatory agricultural Lockout rule: (1) Disengage the PTO or header drive clutch, (2) Lower raised hydraulic headers to the ground or engage the mechanical steel hydraulic cylinder safety lock stop, (3) Place the transmission in Park or Neutral and set the parking brake, (4) Shut off the engine completely and remove the ignition key into your pocket, and (5) Wait until all spinning flywheels, slip clutches, and shafts have come to a complete dead stop (which can take 15 to 30 seconds after engine shutdown) before touching the crop blockage with a wooden clearing stick.
Maupangiri ogwirizana¶
- Severe bleeding and tourniquet application
- Crush injury and compartment syndrome
- Broken bones, fractures, and sprains
- Kuvulala kuntchito ndi ngozi zamakampani
- Carbon monoxide and smoke inhalation first aid
- Asthma attacks and acute respiratory distress
Magwero afufuzidwa¶
- Occupational Safety and Health Administration (OSHA, United States): Grain Handling Facilities Standard (29 CFR 1910.272) and Agricultural Machine Guarding (29 CFR 1928.57)
- National Institute for Occupational Safety and Health (NIOSH / CDC, United States): Preventing Entrapment and Suffocation Caused by the Unstable Surfaces of Stored Grain and Silo Gas / Manure Pit Confined Space Alerts
- Health and Safety Executive (HSE, United Kingdom): Safe Working with Agricultural Power Take-Off (PTO) Drive Shafts, Grain Storage, and Slurry Gases (AIS9 / G167)
- Purdue University Agricultural Safety and Health Program (United States): Summary of U.S. Agricultural Confined Space-Related Injuries and Fatalities and Grain Rescue Tube Extrication Protocols
- Canadian Agricultural Safety Association (CASA, Canada): BeGrainSafe Firefighter Grain Entrapment Rescue Training Manual and Farm Machinery Entanglement Guidelines