CN112696516A - Dust explosion-proof is with passive form suppression flame proof aggregate unit - Google Patents
Dust explosion-proof is with passive form suppression flame proof aggregate unit Download PDFInfo
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- CN112696516A CN112696516A CN202011577465.5A CN202011577465A CN112696516A CN 112696516 A CN112696516 A CN 112696516A CN 202011577465 A CN202011577465 A CN 202011577465A CN 112696516 A CN112696516 A CN 112696516A
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- 230000001629 suppression Effects 0.000 title claims abstract description 73
- 239000000428 dust Substances 0.000 title claims abstract description 30
- 238000004880 explosion Methods 0.000 claims abstract description 132
- 239000003112 inhibitor Substances 0.000 claims abstract description 21
- 239000006185 dispersion Substances 0.000 claims description 22
- 238000005192 partition Methods 0.000 claims description 14
- 230000000452 restraining effect Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005474 detonation Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
本发明公开了一种粉尘防爆用被动式抑隔爆联动装置，涉及粉尘防爆技术领域，包括：壳体，包括两根相互连接的管道以及位于两根管道连接处的型腔；至少一个抑爆部件，至少一根管道上设有抑爆部件，抑爆部件包括抑爆罐以及用于控制抑爆罐内抑制剂释放的触发组件，抑爆罐连通管道；以及隔爆部件，隔爆部件包括阀芯以及可在壳体内进行轴向运动的连接件，阀芯位于型腔内，连接件上设有至少一根连接杆，连接杆可拆卸式连接触发组件，阀芯固定在连接件上，阀芯运动至闭合管道，以使连接杆与触发组件的连接断开，通过阀芯、连接杆、与触发组件的有效联动，实现爆炸传播过程的彻底切断，保证了该抑隔爆联动装置抑隔爆作用的稳定性和有效性。
The invention discloses a passive explosion-proof explosion-proof linkage device for dust explosion, which relates to the technical field of dust explosion-proof. , at least one pipeline is provided with an explosion suppression component, the explosion suppression component includes an explosion suppression tank and a trigger component for controlling the release of the inhibitor in the explosion suppression tank, the explosion suppression tank is connected to the pipeline; and the explosion prevention component, the explosion prevention component includes a valve The core and the connecting piece that can move axially in the housing, the valve core is located in the cavity, the connecting piece is provided with at least one connecting rod, the connecting rod is detachably connected to the trigger assembly, the valve core is fixed on the connecting piece, the valve core is The core moves to the closed pipeline to disconnect the connecting rod and the trigger assembly. Through the effective linkage between the valve core, the connecting rod and the trigger assembly, the explosion propagation process is completely cut off, which ensures that the explosion suppression and isolation linkage device suppresses the isolation. Stability and effectiveness of detonation.
Description
Technical Field
The invention relates to the technical field of dust explosion prevention, in particular to a passive explosion suppression and suppression linkage device for dust explosion prevention.
Background
In recent years, although explosion protection products are popularized and applied in industries involving dust explosion risks, dust explosion disasters still happen occasionally, and cause certain damage and destruction to personnel and equipment, so that economic loss is large. The main reason is that under the actual production process conditions, the dust explosion and propagation mechanism is very complex, which brings great challenges to the prevention and control of dust explosion, and therefore, a dust explosion-proof device is urgently needed to be developed according to the urgent application requirement.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a passive explosion suppression and suppression linkage device for dust explosion prevention, which can realize multi-coupling suppression on the occurrence and propagation conditions of dust explosion and effectively reduce disasters caused by the dust explosion.
According to the embodiment of the invention, the passive explosion suppression and explosion suppression linkage device for dust explosion prevention comprises: the shell comprises two mutually connected pipelines and a cavity positioned at the joint of the two pipelines; the explosion suppression component is arranged on at least one pipeline and comprises an explosion suppression tank and a trigger assembly used for controlling the release of an inhibitor in the explosion suppression tank, and the explosion suppression tank is communicated with the pipeline; the explosion-proof component comprises a valve core and a connecting piece capable of axially moving in the shell, the valve core is located in the cavity, at least one connecting rod is arranged on the connecting piece, the connecting rod is detachably connected with the trigger assembly, the valve core is fixed on the connecting piece, and the valve core moves to be closed to the pipeline, so that the connecting rod is disconnected with the trigger assembly.
Specifically, be equipped with the mounting in the pipeline, the trigger subassembly includes the trigger bar, the trigger bar is connected the mounting, the cover is equipped with first elastic component on the trigger bar, the connecting rod is inserted and is located the trigger bar, so that the trigger bar will first elastic component compression, support the mounting.
Further, an air outlet used for releasing the inhibitor is formed in the explosion suppression tank, a sealing block is arranged at the air outlet, and the trigger rod is detachably connected with the sealing block so that the sealing block blocks the air outlet.
Furthermore, explosion suppression jar includes the separator, the separator will explosion suppression jar's inner space divide into compressed air chamber and dispersion chamber, dispersion chamber intercommunication the pipeline, the gas outlet is seted up the separator, the separator orientation the terminal surface of dispersion chamber is equipped with first recess, first recess intercommunication the gas outlet, the closed piece is located first recess is connected the separator, in order to plug up the gas outlet.
Furthermore, the trigger assembly further comprises a plurality of closed block limiting cores, the closed blocks face the end face of the dispersing cavity and are provided with second grooves, countersunk holes for the closed block limiting cores to move are formed in the groove walls of the second grooves and penetrate through the side faces of the closed blocks, and the end portions of the trigger rods are inserted into the second grooves, so that the end portions of the closed block limiting cores are inserted into the separating pieces.
Furthermore, a second elastic piece is sleeved on the closed block limiting core, one end of the second elastic piece is connected with the closed block, and the other end of the second elastic piece is connected with the closed block limiting core.
Specifically, the explosion-proof component is characterized by further comprising a limiting assembly arranged on the fixing part, the limiting assembly comprises a limiting rod, and a limiting hole matched with the limiting rod is formed in the connecting rod.
Preferably, the connecting piece is provided with a constraint block, the constraint block is positioned between the fixing piece and the valve core, and a third elastic piece is arranged between the constraint block and the fixing piece.
Preferably, the side surface of the valve core is inwards sunken to form a cone.
Preferably, the explosion suppression component is arranged on each of the two pipelines, the connecting rods are located in the pipelines, the two connecting rods are arranged on the two sides of the valve core, and the valve core moves to close one of the pipelines, so that the trigger assembly on the closed pipeline is disconnected from the corresponding connecting rod.
Based on the technical scheme, the embodiment of the invention at least has the following beneficial effects: in the technical scheme, the shell comprises two pipelines which are mutually connected and a cavity which is positioned at the joint of the two pipelines, the explosion-proof component comprises a valve core and a connecting piece, the connecting piece can axially move in the shell, the valve core is connected to the connecting piece, the valve core is positioned in the cavity, meanwhile, the connecting piece is provided with a connecting rod, the connecting rod is detachably connected with a trigger component on the explosion-proof component, when dust explosion spreads from one pipeline to the cavity, under the action of explosion waves, the valve core moves to close the other pipeline provided with the explosion-proof component, when the valve core closes the pipeline, the connection between the connecting rod and the trigger component is disconnected, the trigger component starts, an inhibitor in the explosion-proof tank is released into the pipeline, the pipeline closed by the valve core and the cavity are in a non-communicated state, flame generated by explosion is completely blocked in the cavity, when the valve core is not closed in time, if a small, the escaping explosion flame can be quickly inhibited and extinguished by the inhibitor dispersed in the explosion suppression tank, and the chain reaction of the explosion is isolated. The explosion suppression and explosion suppression linkage device is characterized in that the explosion suppression component and the explosion suppression component are in matched linkage, the valve core is used for physical isolation, the inhibitor of the explosion suppression component eliminates escaping flame, and the explosion propagation process is thoroughly cut off by coupling physicochemical inhibition of energy transfer and physical isolation of a reaction explosion wave front.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a structural cross-sectional view of an embodiment of the present invention;
FIG. 3 is a perspective view of a valve cartridge in an embodiment of the present invention;
FIG. 4 is a cross-sectional view of the structure after an explosion has occurred in an embodiment of the present invention;
fig. 5 is a structural sectional view of an explosion suppressing member in the embodiment of the invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, 2 and 4, the passive explosion suppression and explosion suppression linkage device for dust explosion prevention in the embodiment includes a housing, at least one explosion suppression component 300 and an explosion suppression component 200 installed in the housing.
Referring to fig. 2, the shell comprises two pipelines 120 connected with each other and a cavity 130 located at the joint of the two pipelines 120, the two pipelines 120 are symmetrically arranged, wherein at least one pipeline 120 is provided with an explosion suppression component 300, the explosion suppression component 300 comprises an explosion suppression tank 310 and a trigger assembly for controlling the release of an inhibitor in the explosion suppression tank 310, the explosion suppression tank 310 is communicated with the pipelines 120, and the explosion suppression tank 310 is filled with compressed gas and the inhibitor; the explosion-proof component 200 comprises a valve core 210 and a connecting piece 220 capable of axially moving in a shell, the valve core 210 is positioned in a cavity 130, the connecting piece 220 is provided with at least one connecting rod 221, the connecting rod 221 is detachably connected with a trigger assembly, in the embodiment, one connecting rod 221 is connected with one trigger assembly, the number of the connecting rods 221 corresponds to the number of the trigger assemblies, the valve core 210 is fixed on the connecting piece 220, under normal conditions, the valve core 210 is not closed with the pipelines 120, so that air flow enters the cavity 130 from one pipeline 120 and then flows into the next device from the other pipeline 120, it should be noted that when only one pipeline 120 is provided with an explosion-proof component 300, the explosion-proof component 300 is arranged on the pipeline 120 at the downstream of explosion, when dust explosion is generated in the next device, the impact wave and flame generated by the explosion spread to the cavity 130 from the pipeline, under the action of the, the valve core 210 in the cavity 130 moves axially to close the pipeline 120 downstream of the explosion due to the restriction of the connecting rod 220, so that the connecting rod 221 is disconnected from the trigger assembly, and further, the trigger assembly acts due to the loss of the restriction of the connecting rod 221, so that the inhibitor in the explosion suppression tank 310 is released into the pipeline 120 downstream of the explosion. As will be understood from fig. 4, at this time, the valve core 210 is closed with the pipe 120 downstream of the explosion, which physically blocks the pipe 120 downstream of the explosion from communicating with the cavity 130, and the flame generated by the dust explosion is blocked in the cavity 130, so as to prevent the explosion flame from propagating to the downstream of the explosion, and if a part of the explosion flame escapes to the pipe 120 downstream of the explosion, the explosion flame is also rapidly suppressed by the inhibitor dispersed in the pipe 120. The device is connected through linkage of the valve core 210, the connecting piece 220, the connecting rod 221, the trigger assembly and the explosion suppression tank 310, shock waves generated by explosion firstly act on the valve core 210, the connecting rod 221 on the connecting piece 220 is driven through the valve core 210, so that the trigger assembly is out of limit to trigger the release of an inhibitor in the explosion suppression tank 310, the explosion propagation process is thoroughly cut off through physicochemical inhibition of coupling energy transfer and separation of reaction explosion wave layers, and the stability and effectiveness of the explosion suppression and suppression action of the explosion suppression linkage device are ensured based on a completely passive action design.
Referring to fig. 2 and 4, in the present embodiment, two pipes 120 are provided with explosion suppression components 300, two connecting rods 221 are located in the pipes 120, the two connecting rods 221 are distributed on two sides of a valve core 210, and the valve core 210 moves to close one of the pipes 120, so that a trigger assembly on the closed pipe 120 is disconnected from the corresponding connecting rod 221. In other embodiments, as will be understood with reference to fig. 2, because both the two pipes 120 are provided with the explosion suppression component 300, and both the two pipes 120 and the explosion suppression component 300 are symmetrically arranged, no matter which pipe 120 the dust explosion enters the cavity 130, the passive explosion suppression and suppression linkage device can effectively block the explosion from propagating to the pipe 120 closed with the valve core 210, and the triggering component on the closed pipe 120 is disconnected from the corresponding connecting rod 221, so that the inhibitor in the corresponding explosion suppression tank 310 is released into the closed pipe 120, and the explosion propagation process is completely cut off. In the cavity 130 is isolated from the explosion flame through the valve core 210, the inhibitor sprayed into the pipeline 120 extinguishes the explosion flame escaping to the downstream, and under the double combination of the chemical and physical layers, the bidirectional explosion suppression and suppression function of the passive explosion suppression linkage device is combined, so that the huge harm caused by explosion is effectively avoided.
Wherein, be equipped with mounting 110 in the pipeline 120, trigger assembly includes trigger bar 340, trigger bar 340 connects mounting 110, the cover is equipped with first elastic component on the trigger bar 340, connecting rod 221 is inserted and is located trigger bar 340, so that trigger bar 340 compresses first elastic component, and support at mounting 110, be equipped with on the trigger bar 340 and supply connecting rod 221 male spacing hole, when trigger bar 340 keeps not triggering the state, connecting rod 221 inserts this spacing hole, trigger bar 340 compresses first elastic component.
Further, an air outlet for releasing the inhibitor is arranged in the explosion suppression tank, a sealing block 330 is arranged at the air outlet, the trigger rod 340 is detachably connected with the sealing block 330, so that the sealing block 330 blocks the air outlet, wherein the explosion suppression tank 310 comprises a partition 320, the partition 320 divides the inner space of the explosion suppression tank 310 into a compressed air chamber 350 and a dispersion chamber 360, the dispersion chamber 360 is communicated with the pipeline 120, the air outlet is arranged in the partition 320, a first groove is arranged on the end face, facing the dispersion chamber 360, of the partition 320 and is communicated with the air outlet, the sealing block 330 is positioned in the first groove and is connected with the partition 320 to block the air outlet, and a sealing element is further arranged between the sealing block 330 and the partition 320 to ensure the air tightness of the air outlet.
Specifically, as shown in fig. 5, the trigger assembly further includes a plurality of closed block limiting cores 380, a second groove is formed in the end face, facing the dispersion chamber 360, of the closed block 330, a counter bore for the closed block limiting core 380 to move is formed in a wall of the second groove, the counter bore penetrates through a side face of the closed block 330, a second elastic member is sleeved on the closed block limiting core 380, after the closed block limiting core 380 is inserted into the counter bore, one end of the second elastic member is connected with the closed block 330, the other end of the second elastic member is connected with the closed block limiting core 380, and the end of the trigger rod 340 is inserted into the second groove, so that after the trigger rod 340 makes the closed block limiting core 380 overcome elasticity of the second elastic member, the end of the closed block limiting core 380 is inserted into the separating member 320. It should be noted that the sealing block 330 and the partition 320 are provided with safety bolts for safety. After all the devices are installed, the safety bolts need to be removed, so that the whole device is in a state of waiting to be triggered.
Referring to fig. 2, fig. 2 is a schematic connection diagram of components of the device under normal ventilation, after the connecting rod 221 is inserted into the limiting hole on the triggering rod 340, the first elastic member is in a compressed state, in this embodiment, the first elastic member is a spring, after an explosion occurs, the explosion shock wave pushes the valve core 210 to close the pipeline 120, the connecting rod 221 is drawn out from the limiting hole on the triggering rod 340 under the driving of the valve core 210, the triggering rod 340 loses the limitation, the first elastic recovery generates an elastic force to force the triggering rod 340 to move downward to separate from the second groove, the limiting core 380 of the sealing block recovers to the original position under the action of the second elastic member due to the loss of the limitation of the triggering rod 340, and then the end of the limiting core 380 of the sealing block is drawn out from the partition 320, the sealing block 330 is ejected out of the first groove under the action of the compressed gas, further, the compressed gas in the compressed gas chamber 350 carries the inhibitor to be ejected from, the inhibitor is fully dispersed in the dispersion chamber 360 by the compressed gas, then the uniformly dispersed inhibitor enters the pipeline 120 along with the gas flow to extinguish the flame escaping to the downstream, and the dangerous condition that the explosion flame propagates to the downstream is prevented by the linkage of the valve core 210 and the trigger assembly and the cooperation of the compressed gas and the inhibitor.
Referring to fig. 2 or 4, the explosion suppression component 300 further includes a dispersion nozzle 370, the dispersion nozzle 370 is disposed in the pipeline 120, and the dispersion nozzle 370 is communicated with the explosion suppression tank 310, in this embodiment, each explosion suppression tank 310 is connected with two dispersion nozzles 370, the dispersion nozzle 370 is a hemisphere, the sphere of the dispersion nozzle 370 is provided with a plurality of dispersion holes, the dispersion holes on the dispersion nozzle 370 are more and more dense from the edge to the top of the sphere, and the diameter of the dispersion holes is less and more small, so that the suppressant in the explosion suppression tank 310 can be uniformly dispersed into the pipeline 120, thereby effectively blocking flames.
The explosion-proof component 200 further comprises a limiting component 400 installed on the fixing part 110, the limiting component 400 comprises a limiting rod, a limiting hole matched with the limiting rod is formed in the connecting rod 221, after explosion occurs, the valve core 210 moves to the closed pipeline 120, the limiting hole moves to be matched with the limiting rod along with the connecting rod 221 at the moment, the limiting rod is inserted into the limiting hole under the action of a spring, so that the connecting rod 221 is effectively limited, the movement of the valve core 210 is further limited, and the closed state of the valve core 210 and the closed state of the pipeline 120 are not damaged.
As shown in fig. 3, the connecting member 220 is provided with a restraining block 222, the restraining block 222 is located between the fixed member 110 and the valve core 210, and a third elastic member is arranged between the restraining block 222 and the fixed member 110, so that when the device is normally inflated with an airflow, if the inflated airflow is too large, and the valve core 210 is pushed to one of the pipes 120 to move, the restraining block 222 will press the third elastic member, which is preferably a spring, and under the action of the spring force, the valve core 210 rapidly returns to the original position, so as to avoid the valve core 210 closing the pipe 120, which causes the linkage condition that the explosion suppression component 300 is accidentally triggered to eject the inhibitor, thereby effectively ensuring the normal operation of the device.
Further, the side surface of the valve core 210 is recessed inwards to form a cone, the cone formed by the side surface of the valve core 210 being recessed inwards is beneficial to convergence of explosion waves, when each pipeline 120 is provided with the explosion suppression component 300, correspondingly, the two side surfaces of the valve core 210 are recessed inwards to form a cone, no matter which pipeline 120 the explosion propagates from, the side surface of the valve core 210 facing the explosion can generate larger acceleration under the action of the explosion waves, so that the valve core 210 can move to the closed pipeline 120 quickly, and explosion flames are prevented from escaping to the downstream of the explosion.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011577465.5A CN112696516B (en) | 2020-12-28 | 2020-12-28 | Dust explosion-proof is with passive form suppression flame proof aggregate unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011577465.5A CN112696516B (en) | 2020-12-28 | 2020-12-28 | Dust explosion-proof is with passive form suppression flame proof aggregate unit |
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| Publication Number | Publication Date |
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| CN112696516A true CN112696516A (en) | 2021-04-23 |
| CN112696516B CN112696516B (en) | 2022-12-13 |
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| CN202011577465.5A Active CN112696516B (en) | 2020-12-28 | 2020-12-28 | Dust explosion-proof is with passive form suppression flame proof aggregate unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116345773A (en) * | 2023-05-25 | 2023-06-27 | 河北泰力电机制造有限公司 | Dust gas composite explosion-proof motor |
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| CN108916432A (en) * | 2018-08-13 | 2018-11-30 | 徐州八方安全设备有限公司 | A kind of two-way flame proof valve |
| CN110947126A (en) * | 2019-12-06 | 2020-04-03 | 武汉理工大学 | An explosion-proof and explosion-venting linkage system for combustible gas and dust conveying pipelines |
| CN111420325A (en) * | 2020-04-29 | 2020-07-17 | 大连理工度达安全工程有限公司 | Dust explosion-proof integrated system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH606882A5 (en) * | 1977-02-11 | 1978-11-15 | Hugo Rickenbach | Explosion and flame blow-back protection valve - has hollow plastics filled valve body readjusted for operation after explosion |
| CN106481854A (en) * | 2016-12-27 | 2017-03-08 | 闫正伟 | A kind of dust back pressure flame proof valve |
| CN107300031A (en) * | 2017-08-04 | 2017-10-27 | 江苏爵格工业设备有限公司 | A kind of two-way flame proof valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116345773A (en) * | 2023-05-25 | 2023-06-27 | 河北泰力电机制造有限公司 | Dust gas composite explosion-proof motor |
| CN116345773B (en) * | 2023-05-25 | 2023-07-28 | 河北泰力电机制造有限公司 | Dust gas composite explosion-proof motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112696516B (en) | 2022-12-13 |
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