Dual explosion-proof device

Abstract

The invention discloses a dual explosion-proof device, relates to the technical field of safety protection, and is used for solving the problems that an explosion-proof box in the prior art is difficult to prevent further explosion of explosives and the protection degree of sympathetic detonation is relatively weak. The dual explosion-proof device comprises an outer explosion-proof box assembly, an inner explosion-proof box assembly, a flame-retardant assembly and an explosion-proof buffer layer, wherein the inner explosion-proof box assembly, the flame-retardant assembly and the explosion-proof buffer layer are arranged in the outer explosion-proof box assembly. The flame-retardant assembly is arranged around the inner explosion-proof box assembly, and the explosion-proof buffer layer is arranged between the outer explosion-proof box assembly and the flame-retardant assembly. Double protection can be provided for explosives, disposal measures can be automatically taken in time when the explosives are abnormal, further explosion of the explosives is prevented, the risk of sympathetic detonation is reduced, the influence of the explosives on the surrounding environment is reduced, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of safety protection, and in particular to a double explosion-proof device. Background Art

[0002] During the loading and unloading, transportation, stacking and storage processes, explosive goods are easily affected by external stimuli and their performance may be damaged. If explosive items are exposed to the air for a long time, they will become damp and affect their use. When storing explosive goods, if an explosion occurs, it is easy to cause a sympathetic explosion, posing a serious threat to the surrounding environment.

[0003] Explosives are often placed in explosion-proof boxes, which have good sealing properties and can prevent the explosives from getting wet and from coming into contact with external flammable materials, thereby reducing the risk of explosion.

[0004] In the prior art, when explosive materials abnormally catch fire or abnormally release a large amount of gas in an explosion-proof box, the explosion-proof box is often unable to prevent the explosive materials from further exploding, and the degree of protection against the sympathetic explosion hazard of the explosive materials is relatively weak. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a double explosion-proof device to solve the problem that the explosion-proof box in the prior art is difficult to prevent the explosive materials from further exploding and the protection level of sympathetic explosion is weak.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A double explosion-proof device comprises an outer explosion-proof box assembly, an inner explosion-proof box assembly, a flame-retardant assembly and an explosion-proof buffer layer, wherein the inner explosion-proof box assembly, the flame-retardant assembly and the explosion-proof buffer layer are arranged in the outer explosion-proof box assembly.

[0008] Furthermore, the flame retardant component is arranged around the inner explosion-proof box component, and the explosion-proof buffer layer is arranged between the outer explosion-proof box component and the flame retardant component.

[0009] Furthermore, the outer explosion-proof box assembly comprises an upper shell and a lower shell, and the upper shell and the lower shell are made of high-temperature resistant materials with good air tightness.

[0010] Furthermore, the upper shell and the lower shell are coated with heat-insulating and anti-electromagnetic coatings.

[0011] Furthermore, a one-way exhaust hole is arranged on the upper shell and / or the lower shell.

[0012] Furthermore, the inner explosion-proof box assembly includes a box body and a limit block, and the limit block is arranged in the box body.

[0013] Furthermore, the limiting block is made of elastic material.

[0014] Furthermore, a sealing strip is provided on the box body.

[0015] Furthermore, a one-way air extraction hole is arranged on the box body.

[0016] Furthermore, the explosion-proof buffer layer is an air film structure.

[0017] Furthermore, an airbag and an air inlet are provided on the upper shell; the airbag is provided in the inner cavity of the upper shell and connected to the upper shell; and the airbag is connected to the flame retardant component through the air inlet.

[0018] Furthermore, the air intake portion includes an air intake pipe and an airbag connector, one end of the air intake pipe is connected to the flame retardant component, and the other end is connected to the airbag through the airbag connector.

[0019] Furthermore, the airbag connector is also provided with a closing plug and a first spring, the closing plug is connected to the airbag connector via the first spring, the diameter of the closing plug is smaller than the diameter of one end of the airbag connector connected to the airbag, and larger than the diameter of one end of the airbag connector connected to the air intake pipe, and the closing plug blocks the airbag connector under the action of the first spring.

[0020] Furthermore, the inner explosion-proof box assembly also includes a connecting part, which includes an explosion-proof piece, a connecting pipe and a threaded joint. The connecting pipe is connected to the box body, the explosion-proof piece is arranged at the connection between the connecting pipe and the box body, the threaded joint is connected to the connecting pipe, and the threaded joint is used to connect the inner explosion-proof box assembly with the flame retardant assembly.

[0021] Furthermore, the connecting part also includes a fireproof net, which is arranged in the connecting pipe. A fixed end and a second spring are arranged in the connecting pipe. The fixed end is connected to the box body, and the fireproof net is connected to the fixed end through the second spring.

[0022] Furthermore, a movable groove is provided in the connecting pipe, and a movable block is provided on the fireproof net, and the position and shape of the movable block match the movable groove, so that the fireproof net can move along the movable groove.

[0023] Furthermore, the flame retardant assembly includes a flame retardant frame, a connecting port and a liquid bag, the flame retardant frame is arranged in the lower shell body, the inner flame retardant frame is a cavity structure, the liquid bag is arranged in the cavity of the flame retardant frame, and the flame retardant liquid is placed in the liquid bag; one end of the connecting port passes through the flame retardant frame and is connected to the liquid bag, and the other end can be connected to the connecting pipe through the threaded joint, a sealing film is arranged at the end where the connecting port is connected to the connecting pipe, and spikes are arranged on the side of the fireproof net close to the threaded joint, and the spikes can pierce the sealing film.

[0024] Furthermore, the connection port is connected to the air intake pipe at a position in the flame retardant frame close to the upper shell, the air intake pipe passes through the flame retardant frame and is connected to the airbag connector, and an air hole is provided in the position of the air intake pipe in the inner cavity of the flame retardant frame.

[0025] Furthermore, a bottom explosion-proof layer, a placement plate, a third spring and a pressing rod are also arranged in the lower shell body, the placement plate is connected to the bottom explosion-proof layer through the third spring, the placement plate is used to place the inner explosion-proof box assembly, compressed flame-proof gas is placed in the bottom explosion-proof layer, the bottom explosion-proof layer is connected to the flame-retardant assembly and the explosion-proof buffer layer, a pressing plug is arranged on the bottom explosion-proof layer, and the pressing rod is connected to the pressing plug.

[0026] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0027] (1) The double explosion-proof device provided by the present invention can provide double protection for explosives by arranging an outer explosion-proof box assembly and an inner explosion-proof box assembly. By arranging a one-way exhaust hole on the upper shell and / or the lower shell and the box body, the explosives can be stored in a vacuum environment, thereby reducing the probability of explosion of the explosives and increasing safety. By arranging an airbag and an air inlet on the upper shell, the gas generated by the explosives can be collected when an abnormality occurs in the explosives, so that the airbag is inflated to have a buffering effect and prevent gas leakage from causing danger to the surrounding environment. By arranging an airbag connector, the sealing plug can be opened or closed by the pressure inside and outside the airbag, thereby facilitating the entry of gas into the airbag while preventing the airbag from being damaged by excessive inflation.

[0028] (2) The double explosion-proof device provided by the present invention can automatically take disposal measures in time when an abnormality occurs in the explosive product by arranging a flame retardant component on the lower shell, without the need for staff to operate, thereby reducing the work risk of the staff; the inner explosion-proof box component is connected to the flame retardant component through a threaded joint. When an abnormality occurs in the explosive product, the gas generated by the explosive product can open the explosion-proof plate and enter the connecting pipe, and push the fireproof net to move, so that the sharp thorns pierce the sealing film, and the liquid in the liquid bag enters the box body, thereby flame retardant and cooling the explosive product; by connecting the air inlet pipe to the connecting port, the gas generated by the explosive product can be introduced into the airbag to inflate the airbag, and the air holes on the air inlet pipe can also allow the gas generated by the explosive product to enter the inner cavity of the flame retardant frame, squeeze the liquid bag, and allow the liquid in the liquid bag to enter the box body under the action of gravity and gas pressure, thereby preventing the gas generated by the explosive product from affecting the liquid entering the box body while allowing more liquid to enter the box body.

[0029] (3) The double explosion-proof device provided by the present invention can create a flame-retardant environment in the outer explosion-proof box assembly when an abnormality occurs in the explosive product by arranging a bottom explosion-proof layer, a placement plate, a third spring and a pressing rod, thereby further reducing the risk of explosion of the flammable product and causing a sympathetic explosion. When an abnormality occurs in the explosive product in the inner explosion-proof box assembly, the liquid in the liquid bag enters the inner explosion-proof box assembly, and the pressure of the inner explosion-proof box assembly on the placement plate increases, compressing the third spring, and the airbag inflates to squeeze the inner explosion-proof box assembly, further pushing the placement plate to move toward the bottom explosion-proof layer, so that the placement plate squeezes the pressing rod under the action of the gravity of the inner explosion-proof box assembly and the pressure of the airbag, and the pressing rod squeezes the pressing plug in the direction close to the bottom of the lower shell body, so that the gas in the bottom explosion-proof layer escapes from the pressing plug, thereby forming a flame-retardant environment around the inner explosion-proof box assembly, preventing the explosion of the explosive product from causing a sympathetic explosion.

[0030] (4) The double explosion-proof device provided by the present invention provides double protection for explosives by providing an outer explosion-proof box assembly and an inner explosion-proof box assembly. When an abnormality occurs in the explosive, it can automatically take measures such as inflating the airbag and allowing the flame-retardant liquid in the liquid bag to enter the box body to prevent the explosive from further explosion and reduce the risk of sympathetic explosion. A part of the gas generated by the abnormality of the explosive can enter the airbag for collection, so that the airbag expands to increase the vibration reduction and buffering effect, and increase the thrust on the placement plate. A part of the gas enters the flame-retardant frame to squeeze the liquid bag, improve the efficiency of liquid entering the box body, effectively utilize the gas generated by the explosive and prevent the gas from escaping from the double explosion-proof device to pollute the environment; after the liquid enters the inner explosion-proof box assembly, the increased gravity in the box body can work together with the pressure of the airbag on the placement plate to squeeze the pressing rod, so that the flame-retardant gas in the bottom explosion-proof layer escapes, thereby creating a flame-retardant environment around the inner explosion-proof box assembly, preventing the inner explosion-proof box assembly from burning and exploding, and further reducing the risk of sympathetic explosion. The present invention does not require staff to operate, nor does it require additional energy, is less affected by the outside world, and can reduce the impact of explosive abnormalities on the surrounding environment. It is easy to use, can improve the safety and stability of explosive storage, and reduce the operational risks of staff in handling explosive abnormalities.

[0031] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are only for the purpose of illustrating the particular invention and are not to be considered as limiting the invention. The same reference symbols denote the same components throughout the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the overall structure of the double explosion-proof device of Example 1 of the present invention;

[0034] Figure 2 It is a schematic diagram of the partial structure of the connection between the airbag and the air inlet part of Example 1 of the present invention;

[0035] Figure 3 This is a schematic structural diagram of an airbag connector according to Embodiment 1 of the present invention;

[0036] Figure 4 This is a schematic structural diagram of an inner explosion-proof box assembly according to Embodiment 1 of the present invention;

[0037] Figure 5 This is a schematic structural diagram of a connecting pipe according to Embodiment 1 of the present invention;

[0038] Figure 6 This is a schematic diagram of the partial structure of the flame retardant assembly of Example 1 of the present invention;

[0039] Figure 7 This is a schematic cross-sectional view of a flame retardant assembly according to Example 1 of the present invention;

[0040] Figure 8 This is a schematic structural diagram of the lower housing of Example 2 of the present invention;

[0041] Fig. 9 This is a schematic diagram of the structure of the connection between the bottom explosion-proof layer and the placement plate in Example 2 of the present invention;

[0042] Fig.10 This is a schematic diagram of the structure of the connection between the pressing rod and the pressing plug in Example 2 of the present invention.

[0043] Reference numerals:

[0044] 1-external explosion-proof box assembly; 11-upper shell; 111-air bag; 112-air inlet; 1121-air inlet pipe; 11211-air hole; 1122-air bag connector; 11221-closing plug; 11222-first spring; 12-lower shell; 121-bottom explosion-proof layer; 1211-pressing plug; 122-placing plate; 123-third spring; 124-pressing rod; 2-internal explosion-proof box assembly; 21-box body; 22-limiting block; 23-connecting part; 231-explosion-proof plate; 232-connecting pipe; 2321-fixed end; 2322-second spring; 2323-moving groove; 233-threaded joint; 234-fireproof net; 2341-moving block; 2342-spike; 3-flame retardant component; 31-flame retardant frame; 32-connecting port; 321-sealing film; 33-liquid bag; 4-explosion-proof buffer layer. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the present invention.

[0046] Example 1

[0047] This embodiment provides a double explosion-proof device, such as Figure 1As shown, it includes an outer explosion-proof box component 1, an inner explosion-proof box component 2, a flame-retardant component 3 and an explosion-proof buffer layer 4. The inner explosion-proof box component 2, the flame-retardant component 3 and the explosion-proof buffer layer 4 are placed in the outer explosion-proof box component 1. The inner explosion-proof box component 2 is used to place explosives. The flame-retardant component 3 is arranged around the inner explosion-proof box component 2. When the temperature and pressure of the explosives in the inner explosion-proof box component 2 increase abnormally, the flame-retardant component 3 plays a flame-retardant and cooling role on the explosives. The explosion-proof buffer layer 4 is arranged between the inner wall of the outer explosion-proof box component 1 and the flame-retardant component 3. The explosion-proof buffer layer 4 is used to play a buffering and vibration reduction role when abnormalities occur in the explosives, thereby improving the effect of preventing sympathetic explosion and reducing the risk of sympathetic explosion caused by abnormalities in the explosives.

[0048] like Figure 1 As shown, the outer explosion-proof box assembly 1 includes an upper shell 11 and a lower shell 12. The upper shell 11 and the lower shell 12 are made of high-temperature resistant materials with good air tightness, such as foamed metal, etc. The upper shell 11 is movably connected to the lower shell 12 at one end, and the other end is connected by a fixing member. Exemplarily, the upper shell 11 is hinged at one end and connected to the lower shell 12 at the other end by a buckle.

[0049] Preferably, the upper shell 11 and the lower shell 12 are coated with heat-insulating and anti-electromagnetic coatings to provide better protection.

[0050] Preferably, a one-way exhaust hole is provided on the upper shell 11 and / or the lower shell 12, and the vacuum machine extracts the gas in the outer explosion-proof box assembly 1 through the one-way exhaust hole, so that the outer explosion-proof box assembly 1 is in a vacuum state.

[0051] The upper shell 11 is provided with an airbag 111 and an air inlet 112. The airbag 111 is provided in the inner cavity of the upper shell 11 and connected to the upper shell 11. The airbag 111 is connected to the flame retardant component 3 through the air inlet 112. When the explosive product generates a large amount of gas abnormally, the gas can enter the airbag 111 through the air inlet 112, so that the airbag 111 is inflated and expanded, which has a buffering effect and prevents gas leakage from causing danger to the surrounding environment. The airbag 111 is made of high temperature resistant material.

[0052] Exemplarily, the airbag 111 is made of carbon fiber material.

[0053] like Figure 2 As shown, the air intake part 112 includes an air intake pipe 1121 and an airbag connector 1122. One end of the air intake pipe 1121 is connected to the flame retardant component 3, and the other end is connected to the airbag 111 through the airbag connector 1122, so that the gas enters the airbag 111 through the airbag connector 1122. The diameter of the airbag connector 1122 gradually decreases from the airbag 111 to the air intake pipe 1121.

[0054] like Figure 3As shown, the airbag connector 1122 is also provided with a closing plug 11221 and a first spring 11222. The closing plug 11221 is connected to the airbag connector 1122 via the first spring 11222. The diameter of the closing plug 11221 is smaller than the diameter of the end of the airbag connector 1122 connected to the airbag 111, and larger than the diameter of the end of the airbag connector 1122 connected to the air intake pipe 1121. The closing plug 11221 blocks the airbag connector 1122 under the action of the first spring 11222.

[0055] It should be noted that the gas generated by the explosive goods enters the airbag connector 1122 through the air inlet pipe 1121, and the closing plug 11221 moves toward the direction of the airbag 111 under the action of the air pressure, so that the first spring 11222 is stretched, and the gas enters the airbag 111, so that the airbag 111 is inflated; when the airbag 111 is inflated, since the inner cavity of the outer explosion-proof box assembly 1 is a limited space, the airbag 111 is squeezed, and the air pressure in the airbag 111 increases. When the air pressure in the airbag 111 and the elastic force of the first spring 11222 are greater than the air pressure generated by the gas in the air inlet pipe 1121, the closing plug 11221 moves toward the direction close to the air inlet pipe 1121 and blocks the airbag connector 1122, preventing the gas from continuing to enter the airbag 111 and causing the airbag 111 to be damaged or ruptured.

[0056] like Figure 4 As shown, the inner explosion-proof box assembly 2 includes a box body 21, a limit block 22 and a connecting portion 23. The limit block 22 is arranged in the box body 21. The limit block 22 is made of elastic materials such as rubber. The number of the limit blocks 22 is multiple and is used to limit the movement of explosive items. The connecting portion 23 includes an explosion-proof piece 231, a connecting pipe 232 and a threaded joint 233. The connecting pipe 232 is connected to the box body 21. The explosion-proof piece 231 is arranged at the connection between the connecting pipe 232 and the box body 21. The explosion-proof piece 231 can keep the box body 21 in a sealed state, and rupture when an abnormality occurs in the explosive item, so that the gas generated by the explosive item enters the connecting pipe 232. The explosion-proof piece 231 is a prior art and will not be described here; the threaded joint 233 is connected to the connecting pipe 232, and the threaded joint 233 is used to connect the inner explosion-proof box assembly 2 with the flame-retardant assembly 3.

[0057] Preferably, a one-way air extraction hole is provided on the box body 21 , and a vacuum machine can be used to extract the gas in the box body 21 from the one-way air extraction hole to keep the box body 21 in a vacuum state.

[0058] Preferably, a sealing strip is also provided on the box body 21 to maintain the box body 21 in a closed state.

[0059] like Figure 5As shown, the connecting portion 23 further includes a fireproof net 234, which is arranged in the connecting pipe 232. A fixed end 2321, a second spring 2322 and a moving groove 2323 are arranged in the connecting pipe 232, the fixed end 2321 is connected to the box body 21, the fireproof net 234 is connected to the fixed end 2321 through the second spring 2322, and a moving block 2341 is arranged on the fireproof net 234, and the position and shape of the moving block 2341 match the moving groove 2323, so that the fireproof net 234 can move along the moving groove 2323.

[0060] like Figure 1 and Figure 6-7 As shown, the flame retardant assembly 3 includes a flame retardant frame 31, a connection port 32 and a liquid bag 33. The flame retardant frame 31 is arranged in the lower shell 12. The shape of the flame retardant frame 31 cooperates with the inner explosion-proof box assembly 2, and the inner explosion-proof box assembly 2 is limited to the shape surrounded by the flame retardant frame 31. The flame retardant frame 31 is a cavity structure, and the liquid bag 33 is arranged in the cavity of the flame retardant frame 31; one end of the connection port 32 passes through the flame retardant frame 31 and is connected to the liquid bag 33, and the other end can be connected to the connecting pipe 232 through a threaded joint 233. A sealing film 321 is arranged at one end of the connection port 32 connected to the connecting pipe 232, and the sealing film 321 can prevent the liquid in the liquid bag 33 from entering the connecting pipe 232; the threaded joint 233 can maintain the closedness of the connection between the connection port 32 and the connecting pipe 232, and prevent the connection between the connection port 32 and the connecting pipe 232 from leaking air or liquid. A flame retardant liquid is placed in the liquid bag 33, and the flame retardant liquid is water or aluminum hydroxide flame retardant.

[0061] The connection port 32 is connected to the air intake pipe 1121 near the upper shell 11 in the flame retardant frame 31. The air intake pipe 1121 passes through the flame retardant frame 31 and is connected to the airbag connector 1122. The air intake pipe 1121 is provided with an air hole 11211 in the inner cavity of the flame retardant frame 31.

[0062] Furthermore, a spike 2342 is provided on one side of the fireproof net 234 close to the threaded joint 233 , and the spike 2342 can pierce the sealing film 321 , so that the liquid in the liquid bag 33 enters the connecting tube 232 .

[0063] It is understandable that the second spring 2322 can support the fireproof net 234 and limit the movement of the fireproof net 234 to prevent the fireproof net 234 from being displaced when there is no abnormality in the explosive goods, causing the spikes 2342 to pierce the sealing film 321.

[0064] When explosive items need to be stored, put the explosive items into the box body 21, close the box body, and keep the box body 21 vacuum by a vacuum machine, put the box body 21 into the shape surrounded by the flame retardant frame 31, dock the connecting pipe 232 with the connecting port 32, and keep the box body 21 vacuum by a vacuum machine, and connect the connecting pipe 232 with the connecting port 32 by the threaded joint 233.

[0065] Preferably, Figure 1 As shown, a spring and a rubber block are provided on one side of the flame retardant frame 31 where the connection port 32 is provided. The rubber block abuts against the flame retardant frame 31 through the spring, and the position of the inner explosion-proof box assembly 2 is limited by the rubber block.

[0066] When the explosive in the inner explosion-proof box assembly 2 is abnormally heated and produces a large amount of gas, the explosion-proof plate 231 is ruptured under the influence of temperature and pressure, allowing the gas to enter the connecting pipe 232. The fireproof net 234 moves along the moving groove 2323 to the connection between the connecting pipe 232 and the connecting port 32 under the push of the gas, so that the spike 2342 pierces the sealing film 321, and the liquid in the liquid bag 33 enters the connecting pipe 232 and enters the box body 21 through the connecting pipe 232, so as to flame retard and cool the explosive. A part of the gas generated by the explosive enters the air inlet pipe 1121 through the connecting port 32, and then is filled into the air bag 111 through the air inlet pipe 1121; a part of the gas enters the flame retardant frame 31 through the air hole 11211 on the air inlet pipe 1121, squeezes the liquid bag 33, and makes the liquid in the liquid bag 33 enter the box body 21 under the action of gravity and gas pressure, thereby preventing the explosive in the box body 21 from burning or exploding.

[0067] like Figure 1 As shown, the explosion-proof buffer layer 4 is arranged between the flame retardant component 3 and the lower shell 12. The explosion-proof buffer layer 4 can reduce the impact of the explosive goods on the external explosion-proof box component 1 when the explosive goods are abnormal, thereby reducing the impact on the surrounding environment and reducing the probability of sympathetic explosion.

[0068] Exemplarily, the explosion-proof buffer layer 4 is an air film structure filled with flame-retardant gas, such as carbon dioxide.

[0069] Exemplarily, the explosion-proof buffer layer 4 is an elastic structure such as rubber.

[0070] Example 2

[0071] This embodiment provides a double explosion-proof device, such as Figure 8 to Figure 10 As shown, the difference from Example 1 is that a bottom explosion-proof layer 121, a placement plate 122, a third spring 123 and a pressing rod 124 are also provided in the lower shell 12, so that when an abnormality occurs in the explosive product, a flame-retardant environment can be generated in the outer explosion-proof box assembly 1 to prevent the explosive product from exploding and causing a sympathetic explosion.

[0072] The bottom explosion-proof layer 121 is arranged at the bottom of the lower shell 12, and compressed flame-retardant gas is placed in the bottom explosion-proof layer 121. For example, the flame-retardant gas is carbon dioxide. The bottom explosion-proof layer 121 is arranged at the bottom of the lower shell 12, and the bottom explosion-proof layer 121 is connected to the flame-retardant assembly 3 and the explosion-proof buffer layer 4. A pressing plug 1211 is arranged on the bottom explosion-proof layer 121, and a pressing rod 124 is connected to the pressing plug 1211. When the pressing plug 1211 is pressed toward the bottom of the lower shell 12 by the pressing rod 124, the gas in the bottom explosion-proof layer 121 escapes from the pressing plug 1211; the placement plate 122 is connected to the bottom explosion-proof layer 121 through the third spring 123, and the placement plate 122 is used to place the inner explosion-proof box assembly 2. The number of the third springs 123 is multiple, and the third springs 123 play a supporting role on the placement plate 122. When the explosive is in a normal state, the third spring 123 can prevent the placement plate 122 from contacting the pressing rod 124.

[0073] When the explosive goods in the inner explosion-proof box assembly 2 are abnormal, the liquid in the liquid bag 33 enters the inner explosion-proof box assembly 2, and the pressure of the inner explosion-proof box assembly 2 on the placement plate 122 increases, compressing the third spring 123, and the airbag 111 is inflated to squeeze the inner explosion-proof box assembly 2, further pushing the placement plate 122 to move toward the bottom explosion-proof layer 121, so that the placement plate 122 squeezes the pressing rod 124 under the action of the gravity of the inner explosion-proof box assembly 2 and the pressure of the airbag 111, and the pressing rod 124 squeezes the pressing plug 1211 toward the bottom of the lower shell 12, so that the gas in the bottom explosion-proof layer 121 escapes from the pressing plug 1211, thereby forming a flame-retardant environment around the inner explosion-proof box assembly 2 to prevent the explosion of the explosive goods from causing a sympathetic explosion.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A double explosion-proof device, characterized in that: It comprises an outer explosion-proof box component (1), an inner explosion-proof box component (2), a flame-retardant component (3) and an explosion-proof buffer layer (4); the inner explosion-proof box component (2), the flame-retardant component (3) and the explosion-proof buffer layer (4) are arranged inside the outer explosion-proof box component (1).

2. The double explosion-proof device according to claim 1, characterized in that: The flame retardant component (3) is arranged around the inner explosion-proof box component (2), and the explosion-proof buffer layer (4) is arranged between the outer explosion-proof box component (1) and the flame retardant component (3).

3. The double explosion-proof device according to claim 1, characterized in that: The outer explosion-proof box assembly (1) comprises an upper shell (11) and a lower shell (12), and the upper shell (11) and the lower shell (12) are made of a material with high airtightness and high temperature resistance.

4. The double explosion-proof device according to claim 3, characterized in that: The upper shell (11) and the lower shell (12) are coated with heat-insulating and anti-electromagnetic paint.

5. The double explosion-proof device according to claim 3, characterized in that: One-way exhaust holes are provided on the upper shell (11) and / or the lower shell (12).

6. The double explosion-proof device according to claim 1, characterized in that: The inner explosion-proof box assembly (2) comprises a box body (21) and a limit block (22), wherein the limit block (22) is arranged inside the box body (21).

7. The double explosion-proof device according to claim 6, characterized in that: The limiting block (22) is made of elastic material.

8. The double explosion-proof device according to claim 6, characterized in that: A sealing strip is provided on the box body (21).

9. The double explosion-proof device according to claim 6, characterized in that: The box body (21) is provided with a one-way air extraction hole.

10. The double explosion-proof device according to any one of claims 1 to 9, characterized in that: The explosion-proof buffer layer (4) is an air film structure.

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