Split type cable joint protection explosion-proof fire extinguishing box

Abstract

This invention discloses a split-type explosion-proof fire extinguishing box for cable joint protection, specifically relating to the field of cable joints. It includes a split-type housing and a sealing cover; a fire-prevention mechanism disposed inside the housing; and a fire extinguishing component disposed inside the fire-prevention mechanism; a control mechanism disposed on both sides of the fire-prevention mechanism, including guide grooves on the fire-prevention mechanism and sliding blocks sliding on the guide grooves. Vertically distributed fixing plates are disposed on the sliding blocks, one end of which extends to contact the fire extinguishing component; the other end is close to the side wall of the housing. When the toothed plate continues to move downwards, the connecting gear continues to rotate. At this time, the state of the energy release port changes from "open" to "closed". In this state, the energy release of the fire extinguishing box ends, and the energy release port is closed, continuing to isolate oxygen. The toothed plate moves downwards away from the connecting gear to release the extinguishing agent for secondary closed-loop fire extinguishing, preventing reignition.

Description

Technical Field

[0001] This invention relates to the field of cable joint technology, specifically a split-type cable joint protection explosion-proof fire extinguishing box. Background Technology

[0002] An explosion-proof fire extinguisher box is a protective device used in high-risk environments (especially high-voltage cable joints). It integrates explosion-proof, fire-proof, automatic fire extinguishing, and pressure relief sealing functions. In the event of an internal explosion and fire, it can limit the scope of damage and quickly extinguish the fire, preventing the accident from escalating. Currently, fire extinguishers typically employ the following two methods for fire suppression:

[0003] First, it utilizes the sealed environment to isolate oxygen. During combustion, its explosion-proof and heat-insulating outer shell can isolate the burning chamber, and the fire source will be extinguished after the oxygen is consumed.

[0004] Second, the fire extinguishing effect is achieved by actively releasing fire extinguishing agents. The fire extinguishing agents will vaporize and absorb heat at high temperatures to achieve the effect of cooling and extinguishing the fire.

[0005] In both of the above scenarios, high pressure is generated inside the fire extinguisher box during combustion. To prevent an explosion due to this high pressure, pressure relief is necessary. Currently, pressure relief is achieved by rupturing a pressure relief membrane. However, this process presents a problem: if the pressure relief membrane ruptures due to excessive pressure during combustion, oxygen can re-enter the fire extinguisher box, causing the combustibles to reignite. Therefore, to address this issue, this application proposes a split-type cable connector-protected explosion-proof fire extinguisher box. Summary of the Invention

[0006] The purpose of this invention is to provide a split-type cable connector-protected explosion-proof fire extinguishing box, which solves the problem in the prior art where oxygen re-enters the fire extinguishing box and reignites when excessive pressure ruptures the pressure relief membrane during combustion.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A split-type cable connector-protected explosion-proof fire extinguishing box, including

[0009] Separate housing and sealing cap;

[0010] A fire-prevention mechanism is located inside the housing; and a fire-extinguishing component is installed inside the fire-prevention mechanism.

[0011] The control mechanism is located on both sides of the fire-fighting mechanism, including a guide groove on the fire-fighting mechanism and a sliding block that slides on the guide groove. The sliding block is provided with vertically distributed fixing plates. One end of the fixing plate extends to contact the fire extinguishing component, and the other end is close to the side wall of the housing.

[0012] The pressure relief assembly, corresponding to the position of the control mechanism, includes an energy release port mounted on the housing. The control mechanism controls the closing and opening of the energy release port by moving a sliding block.

[0013] As a further embodiment of the present invention: the fireproof component further includes a receiving box fixedly installed at the bottom of the housing, and an inflatable airbag is fixedly installed inside the receiving box. One end of the inflatable airbag is close to the heat-conducting plate; the other end is close to the fire extinguishing component, and a puncture plate is also provided at the position relative to the inflatable airbag.

[0014] As a further aspect of the present invention: heat-conducting plates are provided at both ends of the accommodating box, and the heat-conducting plates are close to the expansion airbag to increase the heat flow rate so that it can be quickly conducted to the expansion airbag.

[0015] As a further aspect of the present invention: the interior of the inflatable airbag is filled with inert gas, and the interior of the fire extinguishing component is filled with fire extinguishing agent.

[0016] As a further embodiment of the present invention: the fire extinguishing components are distributed in a ring shape inside the receiving box, and the two sides of the puncture plate are connected by connecting rods to the barriers that are perpendicular to the puncture plate. The barriers restrict the ring-shaped fire extinguishing components within the area and arrange them upwards. When the fire extinguishing components flow out, their height will gradually decrease.

[0017] As a further aspect of the invention: Symmetrically distributed guide rods are provided below the sliding block, and a return spring is sleeved on each guide rod. In the normal state of the fire extinguishing assembly, the return spring is in a stretched state due to the height of the fire extinguishing assembly. When the extinguishing agent inside the fire extinguishing assembly is released, the height of the fire extinguishing assembly disappears, and under the elastic potential energy of the return spring, the sliding block is dragged downwards within the guide groove.

[0018] As a further embodiment of the present invention: the pressure relief mechanism includes an energy relief port installed on the housing, and a switch valve is rotatably connected inside the energy relief port. The switch valve has a semi-circular design and a connecting gear is also provided coaxially with it. When sealing is required, it can be rotated into the air outlet to seal it, and when opening is required, it can be rotated away from the air outlet to open it. A toothed plate that meshes with the connecting gear is fixedly installed on one end of the fixing plate near the side wall of the housing.

[0019] As a further embodiment of the present invention: the length of the toothed plate is equal to the circumference of the connecting gear.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This split-type cable connector protects the explosion-proof fire extinguishing box. As the extinguishing agent flows out from the extinguishing assembly, the height of the extinguishing assembly changes, causing the sliding block to move downwards. Simultaneously, this moves the toothed plate downwards. When the toothed plate passes the connecting gear, it drives the connecting gear to rotate. This, in turn, drives the switch valve to rotate, changing the state of the pressure relief port from "closed" to "open." This completes the depressurization of the fire extinguishing box. As the toothed plate continues to move downwards, the connecting gear continues to rotate, changing the state of the pressure relief port from "open" to "closed." In this state, the pressure relief of the fire extinguishing box ends, and the pressure relief port is closed, preventing a large amount of oxygen from entering. When the toothed plate leaves the connecting gear, it continues to move downwards a short distance before finally stopping. This process is to prevent the combustibles inside the fire extinguishing box from reigniting due to contact with oxygen when the pressure relief port is open. Therefore, it continues to discharge extinguishing agent for secondary closed-loop fire extinguishing. This achieves both depressurization and effective fire extinguishing. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of the fire extinguisher box;

[0023] Figure 2 This is a schematic diagram of the internal structure of a fire extinguisher box;

[0024] Figure 3 This is a schematic diagram of the overall structure of the fire prevention system;

[0025] Figure 4 This is a schematic diagram of the overall structure;

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 This is a schematic diagram showing the positional relationship between the control structure and the pressure relief mechanism.

[0028] In the diagram: 10. Shell; 11. Sealing cover; 20. Fireproof mechanism; 21. Container box; 22. Inflatable airbag; 23. Fire extinguishing assembly; 24. Penetrating plate; 241. Connecting rod; 242. Barrier; 30. Control mechanism; 31. Guide groove; 32. Sliding block; 33. Fixing plate; 34. Guide rod; 35. Return spring; 40. Pressure relief mechanism; 41. Energy release port; 42. Switch valve; 43. Connecting gear; 44. Gear plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figure 1The diagram shows the overall structure of a split-type cable connector protected explosion-proof fire extinguisher box. The device includes a split-type housing 10, with cables connected to both ends of the housing 10. The cables are connected inside the housing 10. Waterproof seals are provided on both sides of the housing 10, and these seals are connected to the cables to prevent external water from entering the housing 10. Based on the prior art, this application also makes the following improvements.

[0031] A sealing cover 11 is provided on the top of the housing 10, and the two ends of the sealing cover 11 are fixed to the housing 10 with bolts. A fire prevention mechanism 20 is provided inside the housing 10, and two sets of symmetrically distributed control mechanisms 30 are provided on both sides of the fire prevention mechanism 20. A pressure relief mechanism 40 is provided on the outer wall of the housing 10, which is opposite to the control mechanism 30.

[0032] Specifically, such as Figure 2 As shown, the fire protection mechanism 20 includes a receiving box 21 fixedly installed at the bottom of the housing 10. Heat-conducting plates are provided at both ends of the receiving box 21. An inflatable airbag 22 and a fire extinguishing component 23 are fixedly installed inside the receiving box 21 and in the direction close to the heat-conducting plates. One end of the inflatable airbag 22 is close to the heat-conducting plate; the other end is close to the fire extinguishing component 23. A puncture plate 24 is also provided at the position relative to the inflatable airbag 22.

[0033] Furthermore, the fire extinguishing component 23 is made of flame-retardant and corrosion-resistant plastic and contains a fire extinguishing agent (the fire extinguishing agent can be perfluorohexanone, which is liquid at room temperature and absorbs a large amount of heat when vaporized, which can quickly cool down the temperature and interrupt the combustion chain). In this embodiment, when a high temperature is generated inside the housing 10 or a fire occurs, the internal temperature rises sharply due to the sealing effect. The inert gas inside the expansion bladder 22 expands under high temperature, and the increased volume of the bladder compresses the fire extinguishing component 23. When the fire extinguishing component 23 comes into contact with the puncture plate 24, it will be punctured, and the fire extinguishing agent will flow out to cool down the inside of the housing 10 (the cooling effect is to prevent the high temperature from continuing and causing a fire) or extinguish the fire.

[0034] Meanwhile, in the event of a fire, the inflatable gasbag 22 will continue to expand, and it will come into contact with the puncture plate 24 and be punctured, causing the inert gas inside to be released (the inert gas can be helium, argon, or carbon dioxide). The inert gas can extinguish the fire by isolating oxygen, further improving the fire extinguishing performance.

[0035] As shown in the figure Figure 2 and Figure 3As shown, the fire extinguishing components 23 are arranged in a ring shape inside the housing 21. The two sides of the piercing plate 24 are connected by connecting rods 241 to the barriers 242 that are perpendicular to the piercing plate 24. The barriers 242 restrict the ring-shaped fire extinguishing components 23 within the area and arrange them upwards. When the fire extinguishing components 23 flow out, their height will gradually decrease. Based on this, the present application makes the following improvements: Specifically, the control mechanism 30 includes a guide groove 31 formed on the side wall of the accommodating box 21. A sliding block 32 is slidably connected inside the guide groove 31. Vertically distributed fixing plates 33 are provided on the sliding block 32. One end of the fixing plate 33 extends into the interior of the accommodating box 21 and contacts the fire extinguishing assembly 23; the other end is close to the side wall of the housing 10. Symmetrically distributed guide rods 34 are provided below the sliding block 32. A return spring 35 is sleeved on the guide rod 34. In the normal state of the fire extinguishing assembly 23, the return spring 35 is in a stretched state because the fire extinguishing assembly 23 has height. When the fire extinguishing agent inside the fire extinguishing assembly 23 is released, the height of the fire extinguishing assembly 23 disappears. Under the action of the elastic potential energy of the return spring 35, the sliding block 32 will be dragged to move downward inside the guide groove 31. The downwardly moving fixing plate 33 can squeeze the fire extinguishing assembly 23, causing the fire extinguishing agent contained inside to flow out quickly.

[0036] like Figure 4 and Figure 5 , Figure 6 As shown, the pressure relief mechanism 40 includes a pressure relief port 41 installed on the housing 10. A switching valve 42 is rotatably connected inside the pressure relief port 41. The switching valve 42 has a semi-circular design, and a connecting gear 43 is coaxially arranged with it. When sealing is required, it can be rotated into the outlet to seal it; when opening is required, it can be rotated away from the outlet to open it. A toothed plate 44, meshing with the connecting gear 43, is fixedly installed on one end of the fixing plate 33 near the side wall of the housing 10. In this embodiment, as the extinguishing agent flows out from inside the fire extinguishing assembly 23, the height of the fire extinguishing assembly 23 changes, causing the sliding block 32 to move downwards, synchronously driving the toothed plate 44 downwards. When the toothed plate 44 passes the connecting gear 43, it drives the connecting gear 43 to rotate; consequently, the connecting gear 43 synchronously drives the switching valve 42 to rotate, causing the pressure relief port 41 to change from "closed" to "open." This completes the pressure relief of the fire extinguishing box. As the toothed plate 44 continues to move downwards, the connecting gear 43 continues to rotate. At this time, the state of the vent 41 changes from "open" to "closed". In this state, the venting of the fire extinguishing box ends, and the vent 41 is closed. This prevents a large amount of oxygen from entering the fire extinguishing box and causing the combustibles inside to reignite.

[0037] During this process, the slider 32 has three movement stages, as detailed below:

[0038] In the first stage, when the toothed plate 44 is not in contact with the connecting gear 43, the energy release port 41 is closed, and the entire fire extinguishing box is sealed. Under this sealed condition, no oxygen enters, and as the extinguishing agent in the fire extinguishing component 23 flows out, it can quickly extinguish the fire. After the fire is extinguished, the internal pressure of the fire extinguishing box increases. To prevent an explosion, it is necessary to depressurize the inside. At this point, the next stage begins.

[0039] In the second process, as the extinguishing agent in the fire extinguishing assembly 23 flows out, the toothed plate 44 becomes lower in height and gradually moves downwards to contact the connecting gear 43, causing the connecting gear 43 to rotate. The rotation of the connecting gear 43 will cause the switch valve 42, which is coaxial with it, to rotate, so that the pressure relief port 41 gradually changes from "closed" to "open". In this process, the fire extinguishing box completes the pressure relief.

[0040] In the third step, as the toothed plate 44 continues to move downwards, it remains in contact with the connecting gear 43, closing the vent 41 again to prevent a large amount of oxygen from entering. When the toothed plate 44 leaves the connecting gear 43, it will continue to move downwards a short distance before finally stopping. This process is to prevent the combustibles inside the extinguishing box from reigniting upon contact with oxygen when the vent 41 is open, thus continuing to release extinguishing agent for fire suppression. Because this movement distance is short and the combustion intensity is low, a strong pressure difference is not generated, and pressure relief is unnecessary.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A split-type cable connector protection explosion-proof fire extinguishing box, characterized in that, include The shell (10) and the sealing cap (11) are separate. A fire-prevention mechanism (20) is installed inside the housing (10); and a fire-extinguishing component (23) is installed inside the fire-prevention mechanism (20). The control mechanism (30) is located on both sides of the fire protection mechanism (20), including a guide groove (31) on the fire protection mechanism (20) and a sliding block (32) that slides on the guide groove (31). The sliding block (32) is provided with vertically distributed fixing plates (33). One end of the fixing plate (33) extends to contact the fire extinguishing component (23), and the other end is close to the side wall of the housing (10). The pressure relief assembly (40), corresponding to the position of the control mechanism (30), includes an energy release port (41) mounted on the housing (10), and the control mechanism (30) controls the closing and opening of the energy release port (41) by moving the sliding block (32).

2. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 1, characterized in that, The fireproof component (20) also includes a receiving box (21) fixedly installed at the bottom of the housing (10). An inflatable airbag (22) is fixedly installed inside the receiving box (21). One end of the inflatable airbag (22) is close to the heat-conducting plate; the other end is close to the fire extinguishing component (23). A puncture plate (24) is also provided at the position relative to the inflatable airbag (22).

3. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 2, characterized in that, Heat-conducting plates are provided at both ends of the container (21). The heat-conducting plates are close to the expansion airbag (22) to increase the heat flow rate and make it quickly conduct to the expansion airbag (22).

4. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 2, characterized in that, The inflatable airbag (22) is filled with inert gas, and the fire extinguishing component (23) is filled with fire extinguishing agent.

5. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 4, characterized in that, The fire extinguishing components (23) are arranged in a ring shape inside the container (21). The two sides of the puncture plate (24) are connected by connecting rods (241) and the barriers (242) are arranged perpendicular to the puncture plate (24). The barriers (242) restrict the ring-shaped fire extinguishing components (23) within the area and arrange them upward. When the fire extinguishing components (23) flow out, their height will gradually decrease.

6. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 5, characterized in that, Below the sliding block (32) are symmetrically distributed guide rods (34), and a return spring (35) is sleeved on the guide rod (34). In the normal state of the fire extinguishing assembly (23), the return spring (35) is in a stretched state because the fire extinguishing assembly (23) has a height. When the fire extinguishing agent inside the fire extinguishing assembly (23) is released, the height of the fire extinguishing assembly (23) disappears. Under the action of the elastic potential energy of the return spring (35), the sliding block (32) will be dragged to move downward inside the guide groove (31).

7. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 1, characterized in that, The pressure relief mechanism (40) includes a pressure relief port (41) installed on the housing (10). A switch valve (42) is rotatably connected inside the pressure relief port (41). The switch valve (42) is a semi-circular design, and a connecting gear (43) is also provided on its coaxial position. When sealing is required, it can be rotated into the air outlet to seal it. When opening is required, it can be rotated away from the air outlet to open it. The fixing plate (33) has a toothed plate (44) that meshes with the connecting gear (43) fixedly installed on one end near the side wall of the housing (10).

8. The split-type cable joint protection explosion-proof fire extinguishing box according to claim 7, characterized in that, The length of the toothed plate (44) is equal to the circumference of the connecting gear (43).

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