47 results about "Deflagration" patented technology

The invention discloses an explosion load simulation test device, system and method, and belongs to the technical field of explosion tests. The device comprises a driving section and a driven section, the driving section comprises a test pipeline which is used for guiding and accommodating methane-air mixed gas and deflagration products, a plurality of through holes which can be sealed by bolts are formed in the test pipeline, an obstacle partition plate and a polyethylene film are arranged in the test pipeline, and the polyethylene film is used for forming an inflation section; the driven section comprises an expansion section, a straight section and a structural section which are connected in sequence, the first end of the expansion section is connected with the test pipeline and used for diffusing shock waves generated by detonation, and the two ends of the straight section are connected with the second end of the expansion section and the structural section respectively and used for completing shaping of the blast load and improving the uniformity of blast load distribution on the structural section; and the structural section is used for bearing explosion load driven by detonation of methane and air mixed gas. According to the invention, the methane-air mixed gas is used as an explosion source, so that the test safety is improved, and the test cost is reduced.

The invention discloses a fireproof and explosion-proof safety type transformer, and relates to the technical field of transformers, one side of the top end of an embedded fixing box is connected with an outer row fixing pipe in a penetrating manner, the top end of the inner side of the outer row fixing pipe is fixedly provided with a pressing spring, and the bottom end of the pressing spring is fixedly provided with an I-shaped clamping frame; a clamping sealing ring is fixed to the position, corresponding to the I-shaped clamping frame, of the inner side of the outer exhaust fixing pipe, a plurality of exhaust fixing holes are formed in the outer side end of the outer exhaust fixing pipe at equal intervals, and isolation double-layer sleeves are symmetrically welded to the top end of the inner side of the embedded fixing box. The situation that the environment is polluted due to the fact that transformer oil overflows when hot steam is exhausted is avoided, meanwhile, resources are recycled, resource waste is reduced, the transformer oil is supplemented in real time, stability of internal protection is guaranteed, meanwhile, an internal fire extinguishing component is used for directly conducting fire extinguishing treatment on the interior, and the environment is protected. And the condition of high-pressure deflagration and explosion caused by internal fire is avoided.

The invention belongs to the technical field of safety prevention and control of flammable and explosive environments, and particularly relates to an explosion suppression grading protection system and method, and the system comprises a monitoring module which monitors the environment information in a to-be-monitored area; the signal processing module is used for generating a grading early warning instruction according to the environment information; the explosion suppression execution module is used for executing an explosion suppression action according to the grading early warning instruction; and the reset module is used for generating reset information so as to reset the explosion suppression execution module. On the basis of cooperation of the monitoring module, the signal processing module and the explosion suppression execution module, corresponding explosion suppression actions can be automatically triggered, manual intervention is not needed, a complete and rapid safety protection closed loop from risk perception to active suppression is achieved, the speed and reliability from risk discovery to active intervention are remarkably improved, and the safety protection effect is improved. And the safety risk of the to-be-monitored area is greatly reduced. Based on the cooperation of the reset module, the signal processing module and the explosion suppression execution module, the standby state can be quickly recovered after explosion suppression is completed, the maintenance steps are simplified, and the use cost is reduced.

The present invention discloses a method for evaluating the installation position of an explosion suppression device using flame speed and acceleration, and relates to the field of prediction technology. The method comprises: using a volume balance calculation method to list the variation of the combustion gas volume over time; using a numerical analysis method to calculate the laminar combustion speed of gases with different concentrations, different components, and different proportions; then calculating the gas concentration in front of the flame at different times based on the relationship between the flame position and concentration, and calculating the laminar combustion speed at different times through the above steps. Obtain the flame acceleration; finally, using the relationship between the flame speed and acceleration, find the moment of maximum relative distance between the two, substitute this moment into the velocity equation, obtain the flame position information at this moment, and use this position as the optimal position for placing the explosion suppression device. The present invention can reflect the explosion mutation time and the transition position from deflagration to detonation, and provide theoretical guidance for the placement of explosion suppression sensors and explosion suppression devices in the direction of predicting flame acceleration and shock wave velocity.

The invention provides a safety early warning method and device for a deflagration event and a storage medium. The method comprises the steps of obtaining storage information and real-time detection data of a plurality of warehouses; according to the storage information and the real-time detection data, determining at least one warehouse in which a combustion explosion event does not occur, and taking the at least one warehouse as a monitored warehouse; constructing a monitoring geofence by taking the monitored warehouse as a center and a preset detonation experience distance threshold value as a radius; determining at least one monitoring unmanned aerial vehicle from a plurality of monitoring unmanned aerial vehicles for monitoring the monitoring geo-fence in real time; receiving real-time image data and real-time environment data of at least one monitoring unmanned aerial vehicle; analyzing a target fire risk of the monitored warehouse according to the real-time image data and the real-time environment data; and if the target fire risk is a medium risk or a high risk, estimating an explosion damage radiation range according to the storage information, generating an emergency evacuation event, and sending emergency evacuation prompt information to a user.

A flame-proof and explosion-proof surface combustion gas includes a burner body pierced with a series of orifices, each of which is extended by a rim, wherein the orifices are arranged in several rows of aligned orifices; and a gas distributor that includes a distributor body equipped with a plurality of longitudinal gas-distribution branches, each branch being pierced with a line of orifices bordered by a rim. The distributor body is positioned inside the burner body such that each orifice of the distributor body is coaxial with an orifice of the burner body, wherein when the burner body is coupled to an air supply source and the distributor body is coupled to a gas supply source, the air and the gas mix only at the rims of the burner body.

A gas wave generating system and its use method belong to the field of aerodynamic thermal engineering technology. This gas wave generating system enables the gas mixture to quickly and short-distance transition from deflagration to detonation by setting a premixing chamber and a deflagration acceleration chamber in the gas wave generating device. The system utilizes the rapid pressurization behavior of the unsteady motion shock wave generated in the process of premixed gas deflagration to detonation to achieve a strong discontinuous and discontinuous distribution effect of the shock wave sweeping the airflow pressure field, which can be used in the fields of gas wave cleaning, fire fighting, and bird and animal repelling. The system utilizes the mixing element in the premixing chamber to achieve a full premixing process of the combustible gas and air, and through the strong turbulent disturbance of the turbulent element in the deflagration acceleration chamber, completes the rapid and short-distance transition of the combustion wave from deflagration to detonation, and achieves a spatially discontinuous distribution of the local pressure field of the strong discontinuous sweeping of the airflow. The high-intensity shock wave effect that can be generated by high-activity gases such as coal gas can be achieved in a short distance by using low-activity gases such as coal gas.

The application provides a hydrogen-doped natural gas explosion characteristic experiment device in a confined space, which comprises a pipeline system and a gas distribution system, the pipeline system comprises a driving pipe, a visible pipe and a test pipe arranged in sequence, the gas distribution system comprises a vacuum pump, an electric control valve group and a gas cylinder pipeline connected with each electric control valve in the electric control valve group, and the gas distribution system is connected with the driving pipe through a gas inlet. The hydrogen-doped natural gas explosion accident characteristic evolution and inhibition experiment of different hydrogen proportions can be carried out, and important characteristic parameters in the deflagration and detonation flame propagation process of the hydrogen-doped natural gas can be recorded.

This application belongs to the field of flammable and explosive environment safety control technology, and particularly relates to a graded explosion suppression protection system and method. The system includes: a monitoring module for monitoring environmental information within the monitored area; a signal processing module for generating graded early warning commands based on the environmental information; an explosion suppression execution module for executing explosion suppression actions according to the graded early warning commands; and a reset module for generating reset information to reset the explosion suppression execution module. Based on the cooperation of the monitoring module, signal processing module, and explosion suppression execution module, corresponding explosion suppression actions can be automatically triggered without manual intervention, realizing a complete and rapid safety protection closed loop from risk perception to proactive suppression. This significantly improves the speed and reliability from risk detection to proactive intervention, greatly reducing the safety risk in the monitored area. Based on the cooperation of the reset module with the signal processing module and explosion suppression execution module, the system can quickly return to standby status after explosion suppression, simplifying maintenance steps and reducing operating costs.

The present invention discloses a test device for flame acceleration and deflagration-to-detonation conversion under column group disturbance, comprising a deflagration chamber and a column group assembly arranged in the deflagration chamber, wherein the column group assembly is detachably arranged in the deflagration chamber, the column group assembly comprises a base and a column module, a plurality of column modules are arranged on the base, the column module comprises a first mounting portion and a test portion, the base comprises a second mounting portion, and the first mounting portion is detachably connected to the second mounting portion. Thus, the present invention can realize flexible arrangement of the column modules in the longitudinal and transverse spacing of the base through a detachable combination method, which is conducive to improving the test efficiency of flame acceleration and deflagration-to-detonation tests. At the same time, when conducting flame acceleration and deflagration-to-detonation tests under conditions of different column shapes or column sizes, column modules of different cross-sectional shapes and sizes can be conveniently replaced, thereby avoiding the processing of a large number of fixed obstacles, so as to greatly reduce the test cost.

The present invention relates to the technical field of spherical oxide fillers and provides a method for simultaneously producing nano- and submicron-sized spherical oxide fillers. In this invention, an oxide raw material (raw material O) is combined with a metal or non-metal raw material (raw material M), thereby reducing the reactivity of the raw material and reducing the risk of uncontrollable dust explosions, thereby achieving safe production. At the same time, raw material O is vaporized under high-temperature conditions to form nano-sized particles, or is dispersed into nano-sized particles by the shock waves generated by deflagration. Raw material M reacts with oxygen in an oxygen-rich environment, forming submicron-sized particles through aggregation and cooling. The resulting product particles are cooled in an oxygen-rich environment and then subjected to a fine separation step, thereby simultaneously obtaining submicron-sized and nano-sized spherical oxide fillers. Furthermore, in this invention, after the temperature in the reactor stabilizes, fuel gas consumption can be minimized, thereby stabilizing the temperature in the reactor and reducing costs.

The present invention provides a flame arrester with real-time detection of detonation and deflagration resistance under hydrogen, comprising a flame arrester body, which comprises two mounting shells and a fire arrester element; the two mounting shells are fixed and connected by a plurality of screws; the fire arrester element is located between the two mounting shells, and when the two mounting shells are fixedly connected, the fire arrester element is fixed. When the flame arrester of the present invention is used, when hydrogen is transported, the first flow sensor monitors the hydrogen transport flow in real time. When the hydrogen flow monitored by the first flow sensor is less than the hydrogen transport amount, the two blocking mechanisms seal the ends of the two mounting shells, and the two detection tubes are slid to the second state in the mounting hole by two electric push rods. The fire resistance performance of the fire arrester element can be detected by the fire detection component, thereby understanding whether the fire resistance performance of the fire arrester element is normal, and ensuring that the flame arrester body can smoothly prevent fire when a fire occurs.

The utility model relates to a gas burner technical field, concretely relates to a kind of guide plate for mixing, including integrally-formed center ring part and outside ring part, the outside ring part is concentrically arranged with center ring part, center ring part forms the center through-hole matched with deflector, the edge of center through-hole is provided with several deflector mouth, when mixed gas of gas and air is transported to the below of guide plate from gas extraction pipeline, from deflector mouth place to rise to the above of guide plate.The utility model optimizes the structure of guide plate, and mixed gas of guide gas extraction pipeline is guided into the mixed cavity in the above, helps to realize the uniform stable flow of gas, has promoting effect for subsequent stable combustion, to improve the efficiency of combustion, avoid deflagration and eliminate explosion.

The application discloses a gas extraction pipe self-degreasing double-circuit deflagration flame arrestor, which comprises a double-circuit self-degreasing device and a combustion explosion flame arrestor connected to a gas pipeline, wherein the double-circuit self-degreasing device comprises two branch circuits connected in parallel, and each branch circuit is provided with a filter, a pressure detection mechanism and a circuit electromagnetic valve, which are used for controlling the closing of the branch circuit under the condition that the pressure difference of the branch circuit reaches a pressure difference critical value, and controlling the opening of the branch circuit under the condition that the pressure difference of the other branch circuit reaches the pressure difference critical value. The combustion explosion flame arrestor comprises a gas pipeline and a transverse flame arrestor and explosion relief membrane net, a temperature sensor and an electromagnetic valve device arranged in the gas pipeline, which are used for controlling the closing of the gas pipeline under the condition that the temperature of the gas in the pipeline reaches a temperature critical value. The application adopts the pressure detection mechanism and the circuit electromagnetic valve, realizes the double-circuit self-switching in the process of filtering mixed impurities, and can significantly reduce the labor cost.

An explosion-proof cyclone filter device relates to the field of waste gas treatment technology in monocrystalline silicon production. It includes: an inner cylinder; an outer cylinder fitted around the outer periphery of the inner cylinder, forming a sealed cooling chamber between them; a cooling water pipe installed within the cooling chamber and spirally coiled around the outer wall of the inner cylinder; and an air inlet pipe sealed and connected to the inner cylinder. The cooling water pipe extends from both ends of the outer cylinder, facilitating the introduction of cooling water. This rapidly reduces the temperature of the inner cylinder and red phosphorus dust to below the auto-ignition point of red phosphorus (260°C), thus eliminating the risk of spontaneous combustion of the red phosphorus dust due to high temperatures. Simultaneously, by introducing gas, the cooled red phosphorus dust in the inner cylinder undergoes an oxidation reaction with the gas, thereby achieving the harmless treatment of the red phosphorus dust. The combination of cooling and oxidation effectively prevents explosions during cleaning, thus avoiding damage to the cyclone filter and personal safety hazards to on-site personnel, and preventing fire accidents.

An energy storage system (ESS) (100) knock and heat propagation mitigation method (700) and corresponding systems (500, 600) prevent and optionally extinguish fire in an ESS container (110). The method (700) uses a gas detection system (500), a smoke and temperature detection system (600), and a fire suppression system (430). The gas detection system (500) opens the vent (126) in response to detecting a concentration of the gas that reaches or exceeds a threshold concentration. If desired, after venting the container (110), the smoke and temperature detection system (600) closes the vent (126) and activates the fire suppression system (430) in response to detecting both the presence of smoke and a temperature that reaches or exceeds a threshold temperature.

The present application relates to a kind of solid deflagration expansion fixed type ultrasonic wave drilling anchoring device and method, belong to ultrasonic wave drilling anchoring technical field.Solve the problem of insufficient anchoring force.It includes feeding device and drilling anchoring device, the feeding device is established with drilling anchoring device cooperation, feeding device is used to drive drilling anchoring device, drilling anchoring device is used to realize fixed.The present application when reaching certain drilling depth, solid fuel in the end of drill pipe cavity is ignited by electrode, ignites solid fuel nitrocellulose, occurs violent combustion and explosion, produces a large amount of energy, and the end of drill pipe is extruded and deformed;Deformed expansion cavity will extrude the inner wall of borehole, produce certain expansion force, provide larger effective anchoring force for the whole device, realize the fixation of the whole device, provide larger anchoring force for sampler under simple structure.

The invention discloses an experimental device for deflagration of oil gas in a semi-closed space under obstacle disturbance, which comprises a deflagration pipeline and an inflation system for injecting the oil gas into the deflagration pipeline, the pressure data acquisition system is used for measuring overpressure data in the oil gas deflagration process, the image data acquisition system is used for recording a flame propagation structure in the oil gas deflagration process, and the pressure data acquisition system and the image data acquisition system are connected with the computer. The technical scheme is carried out in a controlled laboratory environment, obstacles with different blocking rates, shapes, positions, numbers and arrangement modes can be replaced for the independently designed detonation pipeline, and the concentration of combustible gas in the pipeline can be changed for an experiment; meanwhile, high-precision measuring equipment can be conveniently installed to collect detailed experimental data, and the oil gas explosion phenomenon and the influence of the oil gas explosion phenomenon on the structure can be safely studied.

A method (700) for mitigating deflagration and thermal spread in an energy storage system (ESS) (100) and corresponding systems (500, 600) prevent and, if necessary, suppress fires in ESS containers (110). The method (700) utilizes a gas detection system (500), a smoke and temperature detection system (600), and a fire suppression system (430). The gas detection system (500) opens a vent (126) when it detects that a gas concentration reaches or exceeds the threshold concentration. If required after the container (110) has been vented, the smoke and temperature detection system (600) can close the vent (126) and activate the fire suppression system (430) when both the presence of smoke and a temperature reaching or exceeding a threshold temperature are detected.

The utility model relates to a gas burner technical field, concretely relates to a kind of gas jet device, including support main body, support main body is connected with several gas supply components and several gas supply channels, at least one gas supply channel is connected with at least two gas supply components to provide gas.The utility model improves the setting mode of gas supply channel, supplies gas simultaneously by multiple gas supply components, improves the directionality of gas supply, is convenient to form uniform stable airflow, improves the stability and reliability of combustion, avoids the occurrence of deflagration and explosion during combustion.

The invention relates to an anti-deflagration method for a circulating aluminum scrap smelting furnace. Safe operation is guaranteed through multiple interlocking and purging mechanisms. Comprising the steps that layered feeding management is conducted, the distance between a material pile and a burner opening is required to be larger than or equal to 1.5 m, and enough combustion space is guaranteed; step-by-step purging triggering is conducted, and forced purging is automatically started for 180-240 seconds according to the furnace temperature and the flameout frequency; valve control safety interlocking adopts a signal feedback electromagnetic valve, and strictly follows the start-stop sequence of'air before air '; leakage detection monitoring is carried out in the whole process, gas pipelines are automatically detected every day, and a combustion system is regularly maintained. According to the method, systematic prevention and control are achieved from the three aspects of process operation, combustion control and equipment maintenance, and the detonation risk is effectively eradicated.

This utility model relates to the field of gas burner technology, specifically to a flow divider plate for the mixing chamber of a burner. It includes an intermediate cylinder with an annular panel at its upper end. A plurality of air holes are evenly distributed along the circumference of the annular panel, extending obliquely from the lower surface to the upper surface of the annular panel. By optimizing the flow divider plate structure, this utility model guides the gas entering the mixing chamber of the burner, ensuring a stable flow and combustion from the lower chamber to the upper chamber. This avoids uneven gas flow or backflow, thus preventing deflagration during ignition and popping noises during ignition shutdown, thereby guaranteeing stable combustion.

The invention provides a coal dust deflagration simulation test device and method, the coal dust deflagration simulation test device comprises a test bin body, an ignition assembly and a monitoring member, the test bin body comprises a test base and a simulation bin, the simulation bin is detachably connected with the base, the simulation bin is also provided with a first observation window, and the ignition assembly is detachably connected with the first observation window in the height direction of the test bin body. The test bin body is provided with a first simulation area and a second simulation area, the first simulation area is located in the simulation bin, the second simulation area is located on the test base, the first simulation area and the second simulation area are used for arranging coal samples, the ignition assembly comprises a first ignition part and a second ignition part, the first ignition part is arranged in the first simulation area, and the second ignition part is arranged in the second simulation area; the first ignition part and the second ignition part are used for igniting explosives, and the monitoring part is arranged close to the first observation window and used for observing and recording the explosion process in the test bin body through the first observation window. The coal dust detonation simulation test device has the advantages of controllable test parameters and high data accuracy.

The utility model relates to a super short flame combustor for top combustion type hot blast stove, can effectively solve the problem of the combustion period dome dead zone CO concentration high resulting in combustion explosion phenomenon, further resulting in dome damage and gas nozzle damage, its solved technical scheme is, the combustor body is by the arc wall body of vault lower part and the straight section wall body connected in vault lower part constitutes, is provided with gas entrance on the outer side wall of straight section wall body, is equipped with gas ring road in the straight section wall body corresponding to gas entrance, and the gas ring road is linked together with the mixed combustion spout of corresponding straight section wall body inner wall on several rows along the circumference and is set up, is provided with air inlet on the outer side wall of arc wall body of vault lower part, the utility model cuts the gas and air fully and subdivides, adopts the mixed spout in the burner and ignites and burns, and the dome area CO of combustion period is lower than 1.5 ten thousand PPM, far lower than the gas and air mixed ignition concentration, can effectively eliminate the existence of deflagration, is the innovation on the combustor.

The present invention discloses a water-cooled capillary type low-concentration gas fire-blocking device and method. First, the flame counter-fire-blocking module diverts and reverses the flame direction through two counter-flow channels to counteract the backflow flame of the main channel, thereby suppressing the propagation speed of the backflow flame to achieve first-level fire blocking and improving the fire blocking efficiency of the subsequent two fire blocking modules; then, the dense capillaries in the water-cooled capillary fire-blocking module can divide the backflow flame, thereby increasing the specific surface area of ​​the flame in contact with the wall, and at the same time, the circulating cold water enhances the wall heat dissipation effect by cooling, reducing the flame temperature and the combustion reaction rate, thereby quenching the backflow flame in the capillary to achieve second-level fire blocking; finally, the porous medium fire-blocking module improves the heat dissipation efficiency by dividing the flame again, and the three fire-blocking modules work together to play a fire-blocking role to achieve a third-level fire blocking effect, thereby being able to effectively and stably block the backflow flame and high-temperature energy generated by the deflagration, thereby ensuring the safety of the ground gas transmission pipeline.

The utility model relates to a novel fire retardant device, which belongs to the technical field of coke oven production smoke collection and comprises a shell, an air inlet and an air outlet are arranged on the shell and used for being connected with a ventilation pipeline, a plurality of baffle plates are arranged in the shell, the baffle plates are arranged in a staggered mode, and the baffle plates can change the direction of airflow entering the shell. Dust particles mixed in the airflow are settled in the shell; the lower part of the shell is connected with an ash bucket for collecting dust particles; a plurality of explosion venting devices are further installed on the top plate and the side wall of the shell. The airflow direction is changed through the baffle plate, the airflow passing time is prolonged, dust particles mixed in airflow are settled in the shell, meanwhile, the temperature of the dust particles is reduced, the dust particles are made to roll into the dust barrel through vibration to be collected, the dust particles are prevented from making contact with open fire to cause the deflagration phenomenon, and potential safety hazards are reduced; when detonation occurs in the shell, pressure can be released through the explosion venting device, and damage to rear-end equipment is prevented.

The utility model relates to a pulverized coal leakage emergency treatment device based on DCS (Distributed Control System) interlocking control, which belongs to the technical field of heat energy power, and comprises a pulverized coal bunker, a detection device, a spraying execution device, a DCS control system and an auxiliary safety device, the detection device consists of a dust sensor, a temperature sensor and a pressure sensor, and is used for monitoring the pulverized coal leakage condition in real time; the spraying execution device comprises a spraying pipeline and a self-cleaning spraying head and is used for dust falling treatment during leakage; the DCS control system realizes interlocking control of each component through the PLC controller and the LoRa communication module; by means of multi-mode leakage detection and interlocking control, the coal powder leakage monitoring system can quickly respond to coal powder leakage events, reduce dust diffusion, prevent deflagration and explosion and guarantee site safety.

The invention relates to the technical field of distribution boxes, in particular to a distribution box with an explosion-proof device, which comprises a box body with good sealing performance, a carbon dioxide storage tank and a control module are arranged in the box body, and the control module is electrically connected with a temperature trigger assembly, an impact force trigger assembly, a buzzer and a flash lamp. The carbon dioxide storage tank is communicated with an alarm triggering assembly, the alarm triggering assembly is communicated with an exhaust valve assembly through a gas conveying pipe, the exhaust valve assembly is connected with an impact force triggering assembly through a transmission assembly, the transmission assembly is connected with a driving motor, and the driving motor is electrically connected with a control module. Monitoring and alarming of high temperature and deflagration of the distribution box are achieved, the distribution box can be cooled and extinguished conveniently in time, fire outbreak is avoided, and the distribution box has wide application prospects in the technical field of distribution boxes.

The application discloses a variable-frequency pulse detonation ash cleaning device with a self-adaptive pressure relief function, and belongs to the cleaning field.The variable-frequency pulse detonation ash cleaning device comprises a two-stage self-adaptive pressure relief device and a detonation ash cleaning structure; the airflow converging tube, the self-adaptive return spring, the thrust roller bearing, the two-stage pressure relief main body and the two-stage pressure relief shell are sequentially positioned and connected along the axial direction of the main flow channel; the detonation ash cleaning structure comprises a one-stage pressure relief section, a mixing section, an ignition section and a detonation chamber provided with a Shchelkin spiral which are in communication; the oxidant is branched by the two-stage self-adaptive pressure relief device, mixed with the fuel at the equal-diameter throat of the mixing inner cylinder, and the explosive mixed gas is generated; under the regulation of the ignition system, simultaneous and time-sharing ignition is realized to form the deflagration flame, the stable self-sustaining detonation wave is obtained by the Shchelkin spiral, and the ash is cleaned by the detonation wave; the high-temperature and high-pressure gas generated by the detonation is returned to the upstream, a part of the gas is released through the one-stage pressure relief section, the remaining gas is collected into the two-stage self-adaptive pressure relief device and drives the main body to perform spiral ascending movement, the high-pressure gas is discharged when the gas discharge channel of the two-stage pressure relief main body and the two-stage pressure relief shell is coincident, the flow relief is realized, and the influence of the detonation back transmission on the normal working of the ash cleaning device is reduced.

The present invention relates to a method and apparatus for stimulation of oil and gas wells by using structured reactive materials while perforating well casings in the well and the formation downhole. A structured reactive material element may be attached to the shaped charge to form a mixed charge. A detonation signal may be delivered to the one or more hybrid charges to detonate the primary explosive in the shaped charge to form a jet to penetrate the well casing and the downhole formation, break the structured reactive material into reactive material particles, and advance the reactive material particles into the downhole formation, deflate in the downhole formation to achieve wellbore stimulation.