Other blasting
First, demolition blasting
(1) The relevant provisions of this section apply to the demolition and blasting of various buildings or structures in the vicinity of towns, indoors, important buildings and equipment.
(2) Before demolition blasting, the blasting object shall be observed and analyzed to clarify the structural characteristics and material conditions, and the surrounding environment of the blasting area shall be inspected in detail.
(3) The construction design must be prepared for demolition and blasting, and submitted to the higher authorities for approval, and the local public security department at or above the county (city) level should obtain the consent. In the construction design documents, in addition to the illustrated blasting objects and related design and calculation materials, it should include:
1. Floor plan of the blasting area (including the location of various facilities at the blasting site, dangerous area, etc.);
2. Construction technical requirements and safety protection measures and organization leadership;
3, the blasting plan (including the maximum amount of charge for a single detonation);
4. The collapse direction of the building after the explosion and the location of the explosion.
(4) When demolition blasting is carried out, the blasting body must be covered with protective cover to prevent flying stones and reduce blasting noise. When there is difficulty in covering large buildings with large blasting, other reliable protective measures can be taken around the demolition of the building. When hydraulic blasting is carried out, corresponding protective measures should be taken according to the specific conditions.
(5) If the structural quality is unclear or the demolition blast of an important project is carried out, a partial test explosion shall be carried out.
(6) Demolition of thin and tall tubular structures such as chimneys and water towers by directional dumping method. If the wind speed is large and the backward direction is inconsistent with the wind direction, the steel cable should be pulled in the direction of the predetermined dumping direction to improve the dumping direction. Accuracy or delay in the blasting day
(7) Ground motion when various buildings or structures fall down after blasting, such as damage to surrounding buildings or equipment, vibration absorbing measures shall be taken.
(8) For the demolition and blasting of the indoor equipment foundation, the open trench shall be dug out around the foundation. The bottom of the trench shall be below the bottom of the base and left, and there shall be no water in the trench.
(9) Staged blasting and disintegration of various buildings or structures shall be strictly prevented due to partial demolition resulting in overall instability.
(10) Hydraulic pressure blasting shall prevent the danger of water column external flushing and adopt drainage measures after blasting.
(11) Demolition and blasting of a building must be completed after it has collapsed. After thorough inspection and confirmation of safety, other construction personnel can enter the site.
(12) Under special circumstances, the sporadic or a small amount of blasting equipment remaining after the blasting shall be allowed to be destroyed on the spot under the supervision of the blasting work leader.
Second, metal blasting
(1) Metal explosion processing shall be carried out in a special explosion field or an explosion factory. The scale and type of explosion processing shall be approved by the competent department and the public security department.
Safe range explosive working field (II) or iron wire mesh fence to be provided. The construction of the explosion processing site shall include two parts, the operation building and the auxiliary building.
(3) Explosive processing plants must have a foundation for earthquake prevention, anti-collapse walls and light roofs. There must be a shock-proof trench around the foundation, the depth of which should be determined according to the maximum allowable amount of explosives.
(4) The indoor explosion well shall have a good ventilation system. The detonation line shall be separated from the test line and a safety self-locking device shall be provided.
(5) The blasting sand well should be placed in a relatively remote place. If a reflector is used, the dose must be strictly controlled, and the reflection of the reflector should not occur.
(6) When the explosion machine is operated, the detonator and the explosive are sent into the explosion chamber to allow the detonation.
Gunpowder hammer should be powered by black powder or smokeless drugs. The maximum charge is determined by design and must not be operated in excess of the dose. After each explosion, the toxic gas is allowed to enter the basement after it has been emptied.
(7) Gunpowder hammer should be made of black powder or smokeless medicine. The maximum charge is determined by design and must not be operated in excess of the dose. After each explosion, the toxic gas is allowed to enter the basement after it has been emptied.
(8) Metal explosion processing shall be carried out by electric power explosion (except for high-voltage line explosion pressure connection). The detonating power supply shall be equipped with a special detonator. The operation of connecting the detonator and the detonation must be carried out by the same person.
(9) The production of the drug pack shall be carried out in a dedicated operation room. For peony and charging operations, labor insurance products should be worn as required, using special tools. Do not mix sand or metal shavings with explosives.
(10) The crushing of metal and metal structures must be carried out in the explosion field and special explosion pits. The explosion plan shall be approved by the person in charge of the competent unit.
(11) When multiple metal bags are used to break metal structures at the same time, it is not allowed to use the fuse to detonate. When using an electric detonator to detonate, the detonating line should be insulated from the metal structure.
(12) After each blasting, the toxic gas in the blast pit shall be discharged into the pit after it has been discharged.
(13) When drilling high temperature gas in the metal structure, the temperature of the hole wall must be reduced to below 40 °C. After the iron scraps in the hole are removed, the drug is loaded.
(14) When the thermocoagulation structure is broken, it must be detonated with a detonating cord and a fuse.
(15) When the temperature at the bottom of the blasthole exceeds 200 °C, it is forbidden to charge the blasthole; when the temperature is lower than 200 °C, the blasthole can be charged, but the package should be insulated to ensure that the temperature inside the package should not exceed 80 ° C.
(16) Before the blasting, the insulation test should be done first. The detonator should be tightly wrapped with asbestos and put into the blasthole. If the detonator does not self-explode within 5 minutes, it is qualified. Otherwise, the asbestos should be thickened and then experimented.
(17) When the temperature at the bottom of the blasthole exceeds 80 °C, all the asbestos should be wrapped in the medicine package and the detonating cord or the fuse. The length of the fuse should not be less than 60cm, and the time of one charge should not exceed 4 minutes.
(18) When the temperature at the bottom of the blasthole is lower than 80 °C, the package may be in other packaging styles, and the time of one charge shall not exceed 5 minutes.
(19) When multiple drug packs are simultaneously blasted, the number of holes allowed to be simultaneously charged shall not exceed 5 when the temperature at the bottom of the hole is lower than 80 °C; the number of holes allowed to be charged at the same time when the temperature is 80 to 200 °C More than two.
(20) When blasting in a thermocoagulated structure, the use of bare drug packs is prohibited.
(21) Filling guns must also use well-screened and dried sand as a cannon.
(22) When iron (steel) slag is discharged from the adjacent furnace, blasting is not allowed in the furnace.
Third, seismic exploration and blasting
(1) In the vicinity of RF power supply, high voltage power grid and other sources of electromagnetic interference, blasting operations are generally not allowed. When blasting is required, it shall be approved by the chief engineer of the competent authority.
(2) The blasting station should be located in the safe area in the upwind direction and have a good view with the blasthole (well, pit).
(3) In the range of 20m around the blasting operation station, it is forbidden to enter the unrelated personnel; the items not related to the blasting operation shall not be piled up in the station.
(4) The transmission line should be avoided as much as possible between the shot point and the blasting station. If a transmission line passes, safety measures must be taken to prevent the blasting network conductor from being rushed out of the blasthole (well, pit) and the transmission line during early explosion and detonation.
(5) Before charging, check whether the blasting network wire, the chronograph line and the telephone communication line are damaged. Only when the insulation is good, the two ends of the network wire are allowed to be short-circuited. The blasting network wires are distinguished from the chronograph lines by the use of obvious signs.
(6) For the same blasting station, only one set of network conductors shall be used, and only one detonating kit shall be allowed on the same shot point (except for combined blasting).
(7) When the blasting center operation station is detonated by remote control, the operator of the instrument must obtain the notice of the blaster and confirm the correctness before detonating. After the blasting, the blaster should immediately remove the key on the detonator, keep it in person, not hand it to anyone, and remove the blasting network wire.
(8) After detonation, the personnel must enter the shot to check the safety situation after 5 minutes, and blast in the cave, culvert, small tunnel or small well without mechanical ventilation. After the gun smoke is removed, the authorized personnel enter the blasting area.
(9) Blasting in a puddle or other shallow water area, the charging point must be more than 1.5m from the water surface.
(10) When the detonating cord is used as the blasting source, the machinery used for trenching and laying the detonating cord does not leave the groove line, and may not reverse and rotate.
(11) In the case of blastholes (wells and pits), the phenomenon of blockage and clogging of the drug packs should be handled according to the blind cannon. The drill pipe is not allowed to be used, and the drug is not allowed to be buried in the blasthole (well, pit). in.
(12) The processed downhole (pit) medicine package shall not be spent in the wild; in special circumstances, when it is necessary to spend the night in the wild, special personnel must be taken care of.
(13) In the exploration and blasting of waters, the relevant provisions of underwater blasting shall be observed.
(14) The blasting operation personnel on the ship of seismic exploration work shall conduct training and assessment of blasting safety technology in advance. There should be personal lifesaving equipment on board.
(15) There is no reliable communication between the blasting operation vessel and the seismic exploration vessel, and blasting is prohibited.
(16) The distance between the blasting operation vessel and the seismic exploration vessel shall not be less than 150m, and the relevant provisions of the safety distance shall be observed.
(17) Explosive pharmacy packages at different depths in the water shall be marked with obvious buoy marks on their corresponding water surfaces.
(18) When placing the medicine pack, the medicine package should be heavy to prevent the medicine pack from floating. The blasting network wire should be taken care of by a special person and hung in a high place. It is forbidden to use the blasting network wire to attach the buoy to the medicine bag.
(19) The blasting operation vessel shall not tow the medicine bag in the water and the bottom of the water. After the drug pack is placed at the designated location of the required depth, the blasting ship is allowed to leave the work site. After the blasting operation vessel has been evacuated to a safe place, it shall be checked again whether the hull form and the surrounding waters are hanged with a drug pack, and the confirmation is correct before the conduction test is performed, and then the detonation signal is issued to perform blasting.
(20) During the period from the start of the charge to the release of the blasting alarm, all the passing vessels must sail in the direction specified by the signal sent by the blaster, and must not enter the blasting danger zone or close to the blasting operation vessel. On the upper and lower reaches of the ship's navigation, a warning ship shall be set up to prevent the unintentional shipman from entering the dangerous area.
(21) The use of gas explosion or electric spark as the source of the earthquake shall be carried out in accordance with a special safety design.
Fourth, oil and gas well blasting
(1) The following provisions shall be observed for the storage of explosives, perforating bullets and coring guns:
1. The perforated projectiles stored in the oil pipe in a separate warehouse shall not be mixed with other perforating bullets or detonating cords;
2. Destroy the detonated detonators, explosives and gunpowder in the warehouse in time.
(2) When charging the corer, the cartridge should be clamped upwards with pliers and equipped with protective devices. It is forbidden to use spark-producing tools when placing the liner. Do not be close to fireworks or power.
(3) The explosive cylinder must be pressure tested before it is loaded, and it is allowed to be filled after passing the test. Filling explosives shall be assigned to a person at a low ditch of not less than 50 m from the rig , residential area and building, and no other personnel shall be present. When charging, you must wipe the threaded portion of the explosion tube and then tighten the cap. It is forbidden to crush the broken perforated ammunition column into the explosion tube.
When installing the detonator into the explosion tube, it is forbidden to pull the foot line or impact friction with force.
(4) When assembling a gun body and a perforating gun without a gun body, the following provisions shall be observed:
1. When the perforating gun with the gun body is used, the perforating projectile should be sent in sequence with the bomber. The detonating cord should be straightened, but it should not be too strong. When the gun is tailed, it must be positioned by hand.
2. When installing the detonator in the body of the gun without the inside of the gun, it must be tied firmly and must not fall off or rub.
(5) It is necessary to leave the wellhead and the power supply when loading the gun at the well site. It is forbidden to stand on both sides of the gun body.
(6) Before the explosion tube, perforating gun (bomb) and coring machine are moved to the wellhead, all power must be cut off. The winch and the instrument car must be connected to the ground wire. After the explosion tube, the perforating gun (bomb) and the core remover are inserted into the well for 50 m, the on-off condition can be checked. Before the wellhead receives the gun, the cable must be discharged to ensure that the core is connected to the gun after the power is not available.
(7) It is forbidden to use the explosive cylinder, perforating gun (bomb) and coring machine that have been charged to carry out the well. The ascending and descending speed of the explosive tube shall not exceed 3000m/h, the perforating gun with the gun body shall not exceed 7000m/h, the perforating gun without the gun body shall not exceed 4000m/h, and the perforating gun for the per-tube nozzle shall not exceed 2000m/h. The ascending speed of the coring machine shall not exceed 3000m/h, and the lowering speed shall not exceed 5000m/h.
(8) Before the explosion-proof explosive tube, projectile hole and core-receiver are put forward, the power supply should be cut off. After the wellhead is raised, the fire line should be disconnected and moved to a safe place.
Explosive detonation cartridges shall be destroyed by explosion at a safe location near the site, and the gunpowder in the coringer shall be destroyed by combustion. Reworked perforating guns (bombs) must be carefully removed, stored separately and delivered to the warehouse for destruction.
(9) When exploding, perforating and coring in oil and gas wells with hydrogen sulfide and carbon monoxide content greater than 1g/m 3 , wellhead workers must wear gas masks.
(10) Oil and gas well explosion fire extinguishing must comply with the following regulations:
1. Prepare the design and construction plan, report it to the higher authorities for approval and file with the public security department;
2. The leader or supervisor engineer of the enterprise management production is personally commanded;
3. The ground loading station should be located in the upwind direction of the wellhead fire source, and its horizontal distance should not be less than 100m, and a safety warning should be set;
4. Inside and outside the wooden box containing explosives and detonators, wrapped with refractory material and tightly wrapped with asbestos rope. Asbestos rope should be immersed in water (for gas well combustion) or immersed foam fire extinguishing agent (for oil well combustion);
5. All personnel must be evacuated to a safe place before detonation;
6. All high-pressure fire hydrants must be equipped with water source and gathered at the interface between the medicine box and the flame and the jet. All high-pressure faucets must be fixed at the designed position before blasting.
(11) When using the detonating cord to release the loose buckle, it is strictly forbidden to stand around the tongs. The diameter of the assembled high temperature detonating cord and high temperature detonator bundle shall not exceed the diameter of the guide sleeve (centralizer). Plastic skin detonating cords shall not be used in wells containing hydrogen sulphide or wells with a well temperature above 130 ° C and a hydraulic pressure above 500 atm.
Co-kneader
Melt pump is installed between the main extruder and the die. The benefits of melt pumps for extrusion operations includes the elimination of surging and other fluctuations, reduction of inconsistent melt temperatures, high pressures at lower product temperatures, compensation for the pumping or mixing capacity of the extruder, possibly reduced start-up times, and reduction of energy required by the extruder
Application:
--Color masterbatch/ Concentrates
--High loading filler masterbatch
--Hot-melt adhesive
--Engineering plastics compounding
--Engineered elastomers
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Model
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SJW-45(M)
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SJW-70(M)
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SJW-100(M)
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SJW-140(M)
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Screw Diameter (MM)
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45
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70
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100
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140
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Length Diameter Ratio
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15-25
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15-25
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15-25
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15-25
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Main Motor Power (KW)
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15-30
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55-75
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90-132
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160-220
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Max. Screw Speed (RPM)
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500
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500
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500
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500
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Reference Output (KG/HOUR)
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40-50
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150-200
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300-400
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800-1000
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Co-Kneader Skw105 For Shearing,Sjw100 Co-Kneader For Toner,Used In Engineering Plastics,Rubber Mixing Machine
JIANGSU XINDA TECH LIMITED , https://www.xindaextruder.com