Explosion-proof box with explosion-proof reinforcement module

Abstract

The application relates to an explosion-proof box with an explosion-proof reinforcing module, comprising a box body, a box cover, an explosion-proof module, wherein the explosion-proof module comprises an explosion-proof shell, the explosion-proof shell is located above the box body and surrounds a flange boss, a through hole is arranged at the middle of the explosion-proof shell, a pressing part is arranged on the inner edge of the through hole and is pressed on the edge of the box cover, the pressing part is provided with a second fixing hole corresponding to each first fixing hole, the explosion-proof shell is provided with a primary alignment device for aligning the first fixing hole and the second fixing hole, an extension part is arranged below the explosion-proof shell, a limiting assembly is arranged between the extension part and the box body, the limiting assembly is used for abutting the explosion-proof module against the side wall of the box body, an explosion-proof reinforcing cavity is formed by the inner side of the explosion-proof shell, the upper end surface of the box cover and the outer circumferential surface of the flange boss, the explosion-proof reinforcing cavity is filled with inert gas and a degenerating device for degenerating the energy of the gas, and a cooling device is arranged on the outer side of the explosion-proof shell and is used for cooling the explosion-proof reinforcing cavity.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof boxes, and more specifically to an explosion-proof box with an explosion-proof reinforcement module. Background Technology

[0002] Explosion-proof enclosures are a type of explosion-proof equipment used in industrial production. They are special enclosures used to house instruments and equipment, protecting them from explosions and fires in hazardous environments and preventing internal explosions from igniting surrounding flammable and explosive gases. They ensure safety during production processes and are of great importance in hazardous locations involving explosive, flammable, or explosive dust.

[0003] As is well known, the principle of explosion protection mainly includes preventing internal gas explosion (introducing inert gas) and preventing the leakage of internal gas carrying high energy and cooling it (designing explosion-proof gaps, explosion-proof threads, etc.). However, after a certain period of use, the performance of the explosion-proof gap will inevitably deteriorate. In this case, the explosion-proof box needs to be replaced. However, during the replacement process, not only is it necessary to vent the internal inert gas (recover or release it to the outside), but it is also necessary to disconnect the previously connected circuits. The equipment needs to be suspended for a period of time, which is not only inconvenient to operate, but also indirectly affects the work progress. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an explosion-proof box with an explosion-proof reinforcement module that enhances the explosion-proof effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a housing and a cover, wherein the housing is rectangular and has a circularly protruding flange boss at its upper center, the flange boss having a mounting hole at its center, the cover being fixed above the flange boss and closing the mounting hole, the flange boss and the cover having a plurality of first fixing holes arranged equidistantly along the circumference along the vertical direction, and the cover having a mating ring extending into the mounting hole and forming an explosion-proof gap with the inner wall of the mounting hole, characterized in that: it further includes an explosion-proof module, the explosion-proof module including an explosion-proof housing, the explosion-proof housing being located above the housing and surrounding the flange boss, the explosion-proof housing having a through hole at its upper center, and the inner edge of the through hole having... The explosion-proof enclosure is equipped with a pressing part that presses against the edge of the enclosure cover. The pressing part is provided with a second fixing hole corresponding to each of the first fixing holes. The explosion-proof enclosure is provided with an initial alignment device for aligning the first fixing holes and the second fixing holes. An extension part is provided below the explosion-proof enclosure that extends and surrounds the side of the enclosure. A limiting component is provided between the extension part and the enclosure to press the explosion-proof module against the side wall of the enclosure. The inner side of the explosion-proof enclosure, the upper end face of the enclosure cover, and the outer peripheral surface of the flange protrusion form an explosion-proof reinforcing cavity. The explosion-proof reinforcing cavity is filled with inert gas. The explosion-proof reinforcing cavity is filled with inert gas and a dissipation device for dissipating gas energy. A cooling device is provided on the outer side of the explosion-proof enclosure to cool the explosion-proof reinforcing cavity.

[0006] By adopting the above technical solution, the following advantages are achieved: ① After simply removing the bolts from the traditional fixed cover and flange boss, the explosion-proof enclosure is placed on top. The initial alignment device aligns the explosion-proof enclosure with the enclosure body and cover. The pressing part then presses against the edge of the cover. Installation is completed by re-tightening the bolts on the pressing part. Assembly is convenient. This process not only eliminates the need for additional processing and fixing structures for the enclosure body and cover, making implementation easy, but also avoids the inconvenience of opening the cover and disassembling the circuit structure, thus avoiding the need to recover and replenish inert gas after opening the cover. Practicality is greatly increased. Furthermore, a limiting component is set to ensure connection strength and improve stability after assembly; ② Explosion-proof enclosure After being enclosed in the enclosure, it forms an explosion-proof reinforced cavity with the upper surface of the enclosure cover and the outer periphery of the flange protrusion. This serves as a supplement to the reduced explosion-proof performance inside the enclosure and also provides multiple layers of protection during initial installation in high-risk work environments. This explosion-proof reinforced cavity reduces the leakage of high-energy gases from the enclosure to the outside in two ways: First, the cavity is filled with inert gas and cooled by a cooling device, so the temperature drops as soon as the leaked high-energy gas enters the cavity, thus reducing its energy. Second, during the cooling process, the high-energy gas impacts a dissipation device, which dissipates the energy it carries, achieving a secondary reduction and fully meeting the requirements for handling high-energy gases.

[0007] The invention is further configured such that: the dissipation device includes a dissipation cavity and a dissipation spring; the dissipation cavity is disposed on each side wall of the explosion-proof reinforcement cavity; the cavity wall of the dissipation cavity includes, from top to bottom, a guide wall, a transition wall, and a dissipation wall; the guide wall is opposite to the gap between the flange boss and the cover and gradually moves away from the flange boss as the height decreases; the transition wall is vertical; the dissipation wall gradually moves closer to the flange boss as the height decreases; and the dissipation spring is a thin-walled metal sheet that is horizontally fixed to the dissipation wall and has elasticity.

[0008] By adopting the above technical solution, when high-energy gas leaks from the gap between the flange boss and the box cover, it comes into contact with the guide wall and flows downward under the guidance of the guide wall. Then, it impacts the dissipation shrapnel and causes it to swing while exchanging heat, so that some energy is transferred to the dissipation shrapnel. The remaining gas rotates repeatedly in the dissipation cavity until it is completely dissipated, thus ensuring that the internal explosion will not cause a chain reaction in the outside.

[0009] The present invention is further configured such that: the number of the dissolving springs is multiple and arranged vertically in sequence, and the width of the dissolving springs increases sequentially from top to bottom.

[0010] By adopting the above technical solution, multiple dissipation shrapnel not only increase the dissipation efficiency, but the increased width from top to bottom also increases the probability of contact with the dissipation shrapnel. Moreover, the oscillations of different dissipation shrapnel in different directions can cancel each other out, improving the installation stability of the explosion-proof enclosure.

[0011] The present invention is further configured such that each of the digestion springs is provided with a vent hole, and the vent hole is parallel to the digestion wall.

[0012] By adopting the above technical solution, the vent can increase the agitation range of the dissipation shrapnel and improve the dissipation effect. On the other hand, it can also transfer some high-energy gas downwards to continue contacting the blocked part of the dissipation shrapnel below, thereby improving the utilization rate of the dissipation shrapnel.

[0013] The present invention is further configured such that: the cooling device includes a substrate, the substrate has a plurality of cooling grates arranged along its length, and each side of the explosion-proof cover is provided with a slot that is inserted into both ends of the substrate.

[0014] By adopting the above technical solution, the pluggable substrate and cooling fins are easier to process and replace, and the number of cooling fins can be adjusted according to the actual environment to meet different environmental requirements.

[0015] The present invention is further configured such that: a disc movable cavity is provided between the extension and the side wall of the box; the limiting component includes a limiting disc located in the disc movable cavity and abutting against the side wall of the box; the limiting disc is provided with a screw threaded to the extension; the screw is provided with a knob on the outside of the extension to drive its rotation; and multiple limiting components are provided opposite to each rectangular side of the box.

[0016] By adopting the above technical solution, the screw works in conjunction with the limiting disc, so that the limiting disc has a large contact surface when it is close to the enclosure, forming a horizontal limiting fit between the explosion-proof cover and the enclosure, and making the limiting fit more stable.

[0017] The invention is further configured such that: the explosion-proof enclosure is provided with a control valve that is connected to an inert gas source through a pipeline and controls the inert gas to enter the explosion-proof enclosure, and a pressure relief valve that connects to the outside when the internal gas pressure exceeds a certain pressure, wherein the control valve and the pressure relief valve are diagonally distributed.

[0018] By adopting the above technical solution, after installation, the control valve is opened after connecting the inert gas source until the flammable and explosive gas in the explosion-proof module is exhausted, and then the control valve is closed to fill and achieve an inert gas environment that is not prone to explosion.

[0019] The present invention is further configured such that: the initial alignment device includes sealing corners located between the edge of the explosion-proof cover and the edge of the box cover and between the explosion-proof cover and the edge of the box body, respectively; the sealing corners are provided with sealing grooves and sealing rings located in the sealing grooves; the sealing rings are provided with V-shaped openings facing the explosion-proof reinforcement cavity; and the V-shaped openings are provided with expansion members to expand the V-shaped openings.

[0020] By adopting the above technical solution, the sealing corner effectively reduces the possibility of leakage and facilitates the rapid positioning of the explosion-proof enclosure and the box. A sealing ring is set at the sealing corner. When the sealing ring is subjected to air pressure, the V-shaped opening will expand further, thereby further improving the sealing effect. The expansion component is generally a spring. Attached Figure Description

[0021] Figure 1 This is a perspective view of a specific embodiment of the present invention;

[0022] Figure 2 This is an exploded view of a specific embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of a specific embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0025] Figure 5 This is a schematic diagram of airflow.

[0026] Figure 6 for Figure 4 A magnified view of B in the middle. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] like Figure 1 — Figure 6As shown, this invention discloses an explosion-proof box with an explosion-proof reinforcement module, including a box body 1 and a box cover 2. The box body 1 is rectangular and has a circular protruding flange boss 11 at the top center. The flange boss 11 has a mounting hole 12 at its center. The box cover 2 is fixed above the flange boss 11 and closes the mounting hole 12. The flange boss 11 and the box cover 2 are vertically provided with a plurality of first fixing holes 111 arranged equidistantly in the circumferential direction. The box cover 2 is provided with a mating ring 21 that extends into the mounting hole 12 and forms an explosion-proof gap 22 with the inner wall of the mounting hole 12. The invention also includes an explosion-proof module, which includes an explosion-proof cover 3. The explosion-proof cover 3 is located above the box body 1 and surrounds the flange boss 11. The explosion-proof cover 3 has a through hole 31 at the top center, which facilitates the adjustment of the box body. In normal operation, a pressing part 32 is provided on the inner edge of the through hole 31 to press against the edge of the cover 2. The pressing part 32 is provided with a second fixing hole 321 corresponding to each of the first fixing holes 111. The explosion-proof cover 3 is provided with an initial alignment device for aligning the first fixing holes 111 and the second fixing holes 321. An extension part 33 is provided below the explosion-proof cover and extends to surround the side of the box 1. A limiting component is provided between the extension part 33 and the box 1 to press the explosion-proof module against the side wall of the box 1. The inner side of the explosion-proof cover 3, the upper end face of the cover 2 and the outer peripheral surface of the flange protrusion form an explosion-proof reinforcing cavity 4. The explosion-proof reinforcing cavity 4 is filled with inert gas and a dissipation device for dissipating gas energy. The outer side of the explosion-proof cover 3 is provided with a device for dissipating the explosion-proof reinforcing cavity 4. The cooling device has the following advantages: ① After simply removing the bolts from the traditional fixed cover 2 and flange boss 11, the explosion-proof cover 3 is placed on top. The initial alignment device positions the explosion-proof cover 3 with the box body 1 and cover 2. The pressing part 32 then presses against the edge of the cover 2. The installation is then completed by re-tightening the bolts on the pressing part 32. This assembly is convenient. The process not only eliminates the need for additional processing and fixing structures for the box body 1 and cover 2, making implementation easy, but also avoids the inconvenience of opening the cover 2 and disassembling the circuit structure, thus avoiding the problems associated with recovering and replenishing inert gas after opening the cover 2 (the circuit structure and gas replenishment structure are existing structures and are not specifically drawn). This greatly increases practicality. Furthermore, to ensure connection strength, a limiting component is also provided. High stability after assembly; ② After the explosion-proof enclosure 3 is placed over the box 1, it forms an explosion-proof reinforced cavity 4 with the upper end face of the box cover 2 and the outer peripheral surface of the flange protrusion. This cavity serves as a supplement to the reduced explosion-proof performance inside the box 1 and also provides multiple safety measures during initial installation in high-risk work environments. The explosion-proof reinforced cavity 4 reduces the leakage of high-energy gas from the box 1 to the outside in two ways. First, the explosion-proof reinforced cavity 4 is filled with inert gas and cooled by a cooling device. As soon as the leaked high-energy gas enters the explosion-proof reinforced cavity 4, its temperature drops, thereby reducing its energy. Second, while cooling, the high-energy gas impacts the dissipation device, which dissipates the energy it carries, achieving a secondary reduction and fully meeting the requirements for handling high-energy gas.

[0030] The dissipation device includes a dissipation cavity 41 and a dissipation spring 42. The dissipation cavity 41 is disposed on each side wall of the explosion-proof reinforced cavity 4. The cavity wall of the dissipation cavity 41 includes, from top to bottom, a guide wall 411, a transition wall 412, and a dissipation wall 413. The guide wall 411 is opposite to the gap a between the flange boss 11 and the cover 2 and gradually moves away from the flange boss 11 as the height decreases. The transition wall 412 is vertical. The dissipation wall 413 gradually moves closer to the flange boss 11 as the height decreases. The dissipation spring 42... 2 is a thin-walled metal sheet that is horizontally fixed to the dissipation wall 413 and has elasticity. When high-energy gas leaks from the gap between the flange boss 11 and the box cover 2, it comes into contact with the guide wall 411 and flows downward under the guidance of the guide wall 411. Then it impacts the dissipation spring 42 and swings while exchanging heat, so that some energy is transferred to the dissipation spring 42. The remaining gas rotates repeatedly in the dissipation cavity 41 until it is completely dissipated, thus ensuring that the internal explosion will not cause a chain reaction in the outside.

[0031] The number of dissipation springs 42 is multiple and arranged vertically in sequence. The width b of the dissipation springs 42 increases from top to bottom. The multiple dissipation springs 42 not only increase the dissipation efficiency, but the increase in width from top to bottom also increases the contact probability with the dissipation springs 42. Moreover, the swing of different dissipation springs 42 in different directions can cancel each other out, improving the installation stability of the explosion-proof enclosure 3.

[0032] Each digestion spring 42 is provided with a vent hole 421, which is parallel to the digestion wall 413. The vent hole 421 can increase the agitation range of the digestion spring 42 and improve the digestion effect. On the other hand, it can transfer some high-energy gas downward to continue to contact the blocked part of the digestion spring 42 below, thereby improving the utilization rate of the digestion spring 42.

[0033] like Figure 5 As shown, the flow distribution of high-energy gas after leakage inside the box 1 is illustrated. During the process, the high-energy gas will be decomposed to make it easier to dissipate, and the local airflow direction will be changed so that the high-energy gas can be partially dissipated by itself, thereby improving the dissipation effect.

[0034] The cooling device includes a base plate 5, on which multiple cooling grates 51 are arranged along the length direction. Each side of the explosion-proof cover 3 is provided with slots 34 that are inserted into both ends of the base plate 5. The plug-in base plate 5 and cooling grates 51 are easier to process and replace. The number of cooling grates 51 can also be adjusted according to the actual environment to meet different environmental requirements.

[0035] A disc movable cavity 35 is provided between the extension 33 and the side wall of the housing 1. The limiting assembly includes a limiting disc 6 located in the disc movable cavity 35 and abutting against the side wall of the housing 1. The limiting disc 6 is provided with a screw 61 that is threadedly engaged with the extension 33. A knob 62 that drives the screw 61 to rotate is provided on the outside of the extension 33. The limiting assembly is provided with multiple screws and the rectangular side of each housing 1. The screw 61 cooperates with the limiting disc 6 so that the limiting disc 6 has a large contact surface when it is close to the housing 1, forming a horizontal limiting engagement between the explosion-proof cover 3 and the housing 1 and making the limiting engagement more stable.

[0036] The explosion-proof enclosure 3 is equipped with a control valve 37 that connects to an inert gas source via a pipeline and controls the inert gas entering the explosion-proof enclosure 3, and a pressure relief valve 36 that connects to the outside when the internal gas pressure exceeds a certain pressure. The control valve 37 and the pressure relief valve 36 are diagonally distributed. After installation, the control valve 37 is opened after connecting the inert gas source until the flammable and explosive gas in the explosion-proof module is exhausted, and then the control valve 37 is closed to fill and achieve an inert gas environment that is not prone to explosion.

[0037] The initial alignment device includes sealing corners 38 located between the edges of the explosion-proof enclosure 3 and the cover 2, and between the edges of the explosion-proof enclosure 3 and the enclosure 1. The sealing corners 38 are provided with sealing grooves 382 and sealing rings 381 located in the sealing grooves 382. The sealing rings 381 are provided with V-shaped openings 3811 facing the explosion-proof reinforcement cavity 4. An expansion member 3812 is provided in the V-shaped opening to expand the V-shaped opening 3811. The sealing corners 38 effectively reduce the possibility of leakage and facilitate the rapid positioning of the explosion-proof enclosure 3 and the enclosure 1. The sealing rings 381 are provided at the sealing corners 38. When the sealing rings 381 are subjected to air pressure, the V-shaped openings 3811 will expand further, thereby further improving the sealing effect. The expansion member 3812 is generally a spring.

Claims

1. An explosion-proof box with an explosion-proof reinforcement module, comprising a box body and a box cover, wherein the box body is rectangular and has a circular protruding flange boss at the top center, the flange boss has a mounting hole at its center, the box cover is fixed above the flange boss and closes the mounting hole, the flange boss and the box cover are provided with a plurality of first fixing holes arranged equidistantly along the circumference along the vertical direction, and the box cover is provided with a mating ring that extends into the mounting hole and forms an explosion-proof gap with the inner wall of the mounting hole, characterized in that: It also includes an explosion-proof module, which includes an explosion-proof housing located above the enclosure and surrounding the flange protrusion. A through hole is provided in the center of the upper part of the explosion-proof housing, and a pressing part is provided on the inner edge of the through hole to press against the edge of the enclosure cover. The pressing part has a second fixing hole corresponding to each of the first fixing holes. The explosion-proof housing is provided with an initial alignment device for aligning the first and second fixing holes. An extension portion extending and surrounding the side of the enclosure is provided below the explosion-proof housing. A limiting component is provided between the extension portion and the enclosure to press the explosion-proof module against the side wall of the enclosure. The inner side of the explosion-proof housing, the upper surface of the enclosure cover, and the outer peripheral surface of the flange protrusion form an explosion-proof reinforcing cavity, which is filled with... The explosion-proof reinforced cavity is filled with inert gas and a dissipation device for dissipating gas energy. A cooling device for cooling the explosion-proof reinforced cavity is provided on the outside of the explosion-proof enclosure. The dissipation device includes a dissipation cavity and a dissipation spring. The dissipation cavity is provided on each side wall of the explosion-proof reinforced cavity. The cavity wall of the dissipation cavity includes a guide wall, a transition wall and a dissipation wall from top to bottom. The guide wall is opposite to the gap between the flange boss and the cover and gradually moves away from the flange boss as the height decreases. The transition wall is vertical. The dissipation wall gradually moves closer to the flange boss as the height decreases. The dissipation spring is a thin-walled metal sheet that is horizontally fixed to the dissipation wall and has elasticity.

2. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: The number of the dissolving springs is multiple and arranged vertically in sequence, and the width of the dissolving springs increases from top to bottom.

3. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: Each of the digestion springs is provided with a vent hole, which is parallel to the digestion wall.

4. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: The cooling device includes a base plate, on which multiple cooling fins are arranged along the length direction, and each side of the explosion-proof cover is provided with a slot that is inserted into both ends of the base plate.

5. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: A disc movable cavity is provided between the extension and the side wall of the box. The limiting component includes a limiting disc located in the disc movable cavity and abutting against the side wall of the box. The limiting disc is provided with a screw that is threadedly engaged with the extension. A knob is provided on the outside of the extension to drive its rotation. Multiple limiting components are provided opposite to each rectangular side of the box.

6. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: The explosion-proof enclosure is equipped with a control valve that connects to an inert gas source via a pipeline and controls the inert gas entering the explosion-proof enclosure, and a pressure relief valve that connects to the outside when the internal gas pressure exceeds a certain pressure. The control valve and the pressure relief valve are diagonally distributed.

7. The explosion-proof box with explosion-proof reinforcement module according to claim 1, characterized in that: The initial alignment device includes sealing corners located between the edge of the explosion-proof enclosure and the edge of the box cover, and between the explosion-proof enclosure and the edge of the box body. The sealing corners are provided with sealing grooves and sealing rings located in the sealing grooves. The sealing rings are provided with V-shaped openings facing the explosion-proof reinforcement cavity. The V-shaped openings are provided with expansion members to expand the V-shaped openings.

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