The function of the safety valve is to open the safety valve to release the pressure when the pressure in the autoclave exceeds the set value, so as to ensure that the pressure in the autoclave is within the safe working range. Precautions are as follows:
1, manually exhaust once a month to ensure that the safety valves before and after the autoclave are flexible and reliable.
2. The exhaust port of the safety valve should be led to a safe position through the pipeline to avoid the injury of exhaust to personnel and equipment.
3. Check the safety valve regularly.
Second, the autoclave in operation under what circumstances should immediately stop running:
1. The working pressure medium temperature of the autoclave exceeds the allowable value, which cannot be reduced by various measures.
2. Cracks, bulging, deformation, leakage and other defects that endanger safety appear in the pot body and lid.
3. The safety accessories are invalid, the lid of the kettle is not closed properly, the connectors are broken, and the fasteners are damaged, which makes it difficult to ensure safe operation.
4, sealing ring rupture, serious air leakage.
5. A fire broke out at the operation post, which threatened the safe operation of the autoclave.
6. Serious vibration or damage to the autoclave and its pipeline endangers safe operation.
7. The kettle is soaked in water during operation.
8. Other circumstances endangering the safe operation of the autoclave.
Three, autoclaved workers in the process of operation safety precautions:
1, do regular inspection, observe the pressure in the kettle, pipeline pressure, apron for air leakage, whether the drain valve is closed, whether the check valve is irrelevant, and whether the exhaust valve is closed.
2. When the pressure is constant, close the main steam valve in time to prevent the pressure from being too high. Take-off accidents should be distinguished, otherwise when the main steam pressure is low, the steam in the kettle will flow backwards.
3. When pouring steam, first check whether the inverted valve device of the other kettle is reliable, especially the kettle that is pulling piles, to prevent steam from rushing out of the kettle through the inverted steam pipeline and causing burns. When opening the kettle door, pay attention to whether there is water in the kettle. If there is water, put it away slowly before opening the door, so as not to hurt people by water spraying. After the steam supply, drainage should be carried out according to the operation steps of turning down first and then turning up.
4. Don't face the valve handle when opening the valve. Stay on your side. The valve should be opened slowly, from small to large. Patrol the operation of equipment frequently, handle the situation in time when it is found, and fill in the operation record truthfully as required.
Four, autoclave steam supply stage how to ensure the quality of pipe pile:
1. boosting: step by step boosting in strict accordance with the process requirements to prevent the internal strength of the pipe pile from being affected by the rapid boosting and temperature rise. If the boosting time is too short, the strength of the pipe pile will decrease.
2. Constant pressure: when the pressure is not enough, air should be replenished in time, and the constant pressure time should be as long as possible, which can improve the strength of the pile accordingly. When the constant pressure is low, in addition to supplementing air, the constant pressure time should be extended to ensure the strength of the pile, and it is not allowed to open the valve and pour steam in advance in the later period of constant pressure.
3. depressurization: depressurize and cool in strict accordance with the process requirements.
Five, how to ensure the quality of pipe pile in autoclaving stage:
1. Steam casting: reduce the pressure according to the process requirements. If the decompression is too fast, longitudinal cracks may appear in the pile body, and the steam reverse valve will gradually open from small to large.
2. Open the door and pull the pile: the pile will expand when it comes out of the pot, and it will shrink when it is cold. You must stop for half an hour after opening the door to pull out the pile. When the weather is cold, the pile must be covered with tarpaulin immediately after the pile is pulled out, and the boiler room has the responsibility and obligation to check and report.
Six, how to save gas consumption per unit of concrete:
1, to reduce the heat loss of the pipeline, and the measures to reduce the heat loss of the pipeline mainly include keeping the main steam pipeline, valves, traps and autoclave warm to prevent leakage.
2. Make good use of hot water recovery to ensure that heat and steam can be recovered in time when hot water is discharged, and adopt automatic liquid level control and temperature control to ensure the utilization rate of hot water recovery.
3, supervise the production workshop reasonable loading, pipe mold into the pool.
4. Supervise the production workshop to load into the kettle in time, and pull out the kettle on site in time to ensure the hot reactor kettle.
Seven, see the kettle operator's operating skills and precautions:
1. Three steps to close the door: check the sealing ring, lock it and close the exhaust valve.
2. When opening and closing the door, don't stand in the middle of the door and move with it. Stand on both sides and push and pull to prevent the door from falling off and hurting people.
3. When closing the door, slowly pull the door. Don't let the door touch the teeth. Shake the door in place and lock it.
4. It is particularly important to check after closing the door, especially to check whether the front teeth are shaking in place, whether the lock is in good condition and whether the safety handle is in the correct position. , and signed by the three parties.
5. Strengthen inspection during steam supply, including: whether the locking device of the main steam reversing valve is intact, whether the vent valve and trap are closed, whether the sealing ring is properly raised, and whether the state of the steam reversing valve is correct.
6, when opening the main steam should be slow, when opening the valve should be careful not to close the valve, in order to prevent valve leakage or valve damage, steam rushed out of the injury.
Eight, watch the kettle member when opening the kettle door matters needing attention:
1. Before opening the door, check whether all air inlet valves are closed and confirm that the pressure in the kettle has dropped to zero. Open the door slowly and steadily, shake the door quickly and then slowly, and slow down when steam comes out. When opening the door, observe the steam discharge of the exhaust valve and pay attention to the residual gas. For example, when the kettle door is about to swing open and the residual gas is still sufficient, you must wait for the residual gas and water in the kettle to come out clean, and then slowly open the door. If the residual gas in the kettle does not come out, it is necessary to stop the operation and inspection, otherwise the kettle door will be forced to swing by steam, which will easily lead to strong ejection. If you feel tired when shaking the door, first check whether the apron valve is closed, and then observe whether the residual gas discharge is clean.
2. When opening the kettle door, people should stand on the side of the kettle door, choose a good position and open the door slowly to prevent soda from rushing out and hurting people.
3. When opening the kettle door, we should first use the inertia of the door itself to control the opening speed of the kettle door. Be careful not to let the kettle door hit the kettle body, and hang the kettle hook after opening the door to prevent the kettle door from being damaged when running back to pull the pile, causing an accident. Brush more oil after opening the door to help open and close the door. Check all valves, pipes, etc. It's all intact after opening the door.
Nine, see the kettle member succession and succession matters needing attention:
1. There was a lot of condensed water in the main steam pipeline of the autoclave during the shift change. After the furnace is started, it is necessary to strengthen the drainage of pipes and sub-cylinders. Each workshop must open the water inlet valve of the autoclave and discharge the remaining water in the pipeline into the kettle to prevent water impact accidents in the pipeline.
2. When taking over, the successor must check each autoclave to see whether the kettle door is in place and locked, and check the operation records to confirm whether the working conditions of each autoclave are consistent with the succession. The person in charge of the succession must wait until the successor has finished the inspection, record the operation of the autoclave in detail on the patrol record, and make clear the handover matters before leaving work.
X the necessity of adjusting the straightness deviation between the track in the kettle and the track in the workshop and site;
Because the deviation of the straightness of the inner and outer tracks of the kettle is easy to cause the pipe pile to rub against the kettle body, we should pay close attention to the gap between the pipe pile and the kettle body in daily operation, and adjust the deviation of the inner and outer tracks of the kettle according to the deviation value, so that the inner and outer tracks of the kettle are in the same straight line, so as to ensure the smooth operation of the kettle truck.
Eleven, autoclave door shaft maintenance matters needing attention:
Since the opening, closing and hanging of the autoclave door are all completed by the autoclave door shaft, attention should be paid to the maintenance of the door shaft in daily inspection and maintenance, especially the lubrication of the door shaft (it is best to cover the adjusting nut of the door shaft to prevent the sun and rain, which can appropriately shorten the lubrication cycle). Be sure to keep the door shaft well lubricated to avoid the door shaft from being worn.
Twelve, autoclave regular inspection regulations:
In daily operation, autoclave should be carefully recorded and put on record. After the autoclave has been put into use for three years, the autoclave should be comprehensively inspected by a special inspection department, and the autoclave should be visually inspected once a year. The special inspection department will issue corresponding inspection reports to ensure the safe and stable operation of the autoclave.
Thirteen, autoclave instrument matters needing attention:
Due to the special operation environment of autoclave, it is necessary to monitor the whole operation process of autoclave:
1. Always ensure that the working conditions of the autoclave are within a safe range. Regularly carry out professional calibration inspection on auxiliary instruments such as autoclave pressure gauge and safety valve, and obtain calibration reports to ensure normal operation of instruments and safe operation of equipment.
2. Ensure that all instruments are clear, sensitive and reliable.
3, the instrument should be accurate, and draw the highest indicator red line on the dial.
4. After each instrument is calibrated, it shall not be adjusted at will to ensure that the lead seal is intact.
Fourteen, how to prevent damage to the autoclave door insulation layer:
1, when opening and closing the door, employees should pay attention to the position of the movable track and the car, do not collide with the pot door, and open and close the door slowly.
2, because the pot door insulation iron sheet is too thin and easy to deform, it can be reinforced.
Fifteen, autoclave rubber ring matters needing attention:
1. After opening the door, check the abrasion of the rubber band in time, and replace the damaged rubber band in time.
2. Clean the impurities on the pot door and rubber band before closing the door.
3. Check whether the teeth on the pot door have metal burrs and smooth them in time.
4. Oil the rubber band regularly.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd