Explosion-proof protection device for cable joint

Abstract

The invention discloses a cable joint explosion-proof protection device, and relates to the technical field of cable joint protection, the cable joint explosion-proof protection device comprises a cable joint body, and the outer surface of the cable joint body is provided with an explosion-proof assembly; when the device is used, the two first protection rings, the two rupture discs and the two second protection rings form a circular arc extinguish chamber; when electric sparks are generated, due to the shape of the wave-shaped metal partition plate, the electric arc needs to advance along the fluctuating path of waves, the length of the electric arc is greatly increased, the energy density of the electric arc is reduced, when the electric arc encounters the split holes, the electric arc is divided by the split holes to form a plurality of small electric arc branches, and the energy of the small electric arc branches is relatively small; meanwhile, the insulating oil absorbs heat generated by the arc to reduce the temperature of the arc; the heat conduction rod can conduct heat to the outside; under the action of the protection assembly, electric sparks can be eliminated, and the electric sparks are prevented from impacting the explosion-proof shell repeatedly.

Description

Technical Field

[0001] The present invention relates to the technical field of cable joint protection, and specifically provides an explosion-proof protection device for cable joints. Background Art

[0002] A cable joint is a device used to connect and extend cables, aiming to achieve electrical connection, transmit electric energy, and ensure the safety and stability of the electrical system. Cable joints are usually used in factories, buildings, and other places where power supply is required to connect cables of different lengths or connect cables to electrical equipment. In some special environments, such as coal mines, petrochemical industries, etc., where there are flammable and explosive gases or dust, if a cable joint fails and generates an electric spark, and the explosive gas or dust enters the inside of the joint, it may trigger an explosion and spread outward, causing a secondary explosion, resulting in casualties and property losses.

[0003] In the prior art, the explosion-proof protection method for cable joints is to install an explosion-proof shell outside the cable joint. However, when an electric spark is generated due to a cable joint failure, it will impact the inside of the explosion-proof shell. Frequent electric spark impacts will cause ablation, deformation, etc. on the inner wall of the explosion-proof shell, resulting in metal fatigue and reducing the strength of the explosion-proof shell. When an explosion occurs, the explosion-proof shell is easily damaged under the explosion impact, greatly reducing the explosion-proof effect of the explosion-proof shell.

[0004] Therefore, we propose an explosion-proof protection device for cable joints to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide an explosion-proof protection device for cable joints to solve the problem that when the explosion-proof shell of the cable joint in the above background art is in use, frequent electric spark impacts will cause ablation, deformation, etc. on the inner wall of the explosion-proof shell, resulting in metal fatigue, reducing the strength of the explosion-proof shell, being easily damaged, and greatly reducing the explosion-proof effect of the explosion-proof shell.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An explosion-proof protection device for cable joints, including a cable joint body, an explosion-proof component is arranged on the outer surface of the cable joint body, and a protection component is arranged inside the explosion-proof component;

[0007] The protection component includes two first protection rings. Rupture discs are fixedly installed on the outer surfaces of one sides of the two first protection rings. Second protection rings are fixedly installed on the outer surfaces of one sides of the two rupture discs. A plurality of wavy metal partitions are fixedly installed on the inner walls of the two second protection rings. Filling cavities are formed inside the plurality of wavy metal partitions. Insulating oil is arranged inside the plurality of filling cavities. Split holes are formed on the outer surfaces of the plurality of wavy metal partitions. Two heat conducting rods are fixedly installed on the outer surfaces of the plurality of wavy metal partitions. The two first protection rings, the two rupture discs and the two second protection rings form a circular arc extinguishing chamber. The wavy metal partitions are distributed in a circular pattern in this space, and the arc has sufficient movement paths in the circumferential direction. When an electric spark is generated, the shape of the wavy metal partitions causes the arc to travel along the undulating path of the waves, greatly increasing the length of the arc and reducing the arc energy density. When encountering the split holes, the arc will be divided by the split holes to form a plurality of smaller arc branches, and the energy of the small arc branches is relatively small. At the same time, the insulating oil absorbs the heat generated by the arc and reduces the temperature of the arc. The heat conducting rods can conduct the heat to the outside, which helps to maintain the performance of the protection component. Under the action of the protection component, it is beneficial to eliminate the electric spark and prevent the electric spark from repeatedly impacting the explosion-proof housing, resulting in damage to the explosion-proof housing and affecting the explosion-proof effect.

[0008] Preferably, the explosion-proof component includes two connecting sleeves. Explosion-proof housings are fixedly installed on the outer surfaces of the two connecting sleeves. First fixing nets are fixedly installed inside the two explosion-proof housings. Second fixing nets are fixedly installed on the inner walls of the two first fixing nets. Fireproof mud is arranged on the outer surfaces of the two first fixing nets. Quartz sand is arranged on the outer surfaces of the two second fixing nets.

[0009] Preferably, a first sealing sleeve is fixedly connected to the outer surface of one side of one of the second protection rings, and a second sealing sleeve is fixedly connected to the outer surface of one side of the other second protection ring. The outer surface of the first sealing sleeve is in contact with the outer surface of the second sealing sleeve. One ends of the plurality of heat conducting rods respectively penetrate through the two first protection rings, the two second protection rings, the two second fixing nets, the two quartz sands, the two first fixing nets, the two fireproof muds to the outer surfaces of the two explosion-proof housings.

[0010] Preferably, the outer surfaces of the two first protection rings are respectively fixedly installed on the outer surfaces of the two connecting sleeves away from the explosion-proof housings. The outer surfaces of the two first protection rings are respectively located inside the two second fixing nets. The outer surface of one side of the first protection ring is in contact with the outer surface of one side of the second protection ring.

[0011] Preferably, a convex sealing ring is fixedly connected to the outer surface of one side of one of the explosion-proof shells, and a concave sealing ring is fixedly connected to the outer surface of one side of the other explosion-proof shell. The outer surface of the convex sealing ring is in contact with the outer surface of the concave sealing ring. Three fixing blocks are fixedly installed on the outer surface of the other explosion-proof shell near the concave sealing ring, and clamping grooves are formed inside the three fixing blocks.

[0012] Preferably, three connecting blocks are fixedly installed on the outer surface of one of the explosion-proof shells near the convex sealing ring. A positioning concave rod is fixedly installed near the top of one side of one of the connecting blocks. A positioning groove is formed near the top of the outer surface of one of the fixing blocks. One end of the positioning concave rod is movably embedded in the positioning groove. Quartz sand has a very high melting point and thermal stability, can absorb the energy generated by the explosion, and plays a role in buffering and heat insulation. Fire clay has good plasticity and fire resistance. When exposed to high temperatures, the fire clay will not burn and will form a hard heat insulation layer to prevent the spread of flames and heat. The explosion-proof shell has high strength and can withstand the pressure generated by the internal explosion. Its strong structure can prevent the shell from cracking and confine the explosion inside. Under the action of the explosion-proof component, it can prevent the occurrence of an external secondary explosion.

[0013] Preferably, a positioning rod is fixedly installed near the top of one side of the other connecting block. A positioning slot is formed near the top of the outer surface of the other fixing block. One end of the positioning rod is movably embedded in the positioning slot. A positioning convex corner rod is fixedly installed near the top of one side of another connecting block. A positioning convex corner slot is formed near the top of the outer surface of another fixing block. One end of the positioning convex corner rod is movably embedded in the positioning convex corner slot.

[0014] Preferably, threaded holes are formed at the tops of the three fixing blocks, fixing grooves are formed on one side inside the three clamping grooves, fastening bolts are threadedly embedded in the three threaded holes, and the outer surfaces of the three connecting blocks are respectively movably embedded in the three clamping grooves.

[0015] Preferably, two connecting sleeves are respectively movably sleeved on the outer surface of the cable joint body near both ends. Threaded sealing grooves are formed inside the two connecting sleeves. Threaded sealing sleeves are threadedly embedded in the two threaded sealing grooves. The two threaded sealing sleeves are respectively threadedly sleeved on the outer surface of the cable joint body near both ends. Sealing rings are fixedly installed on the outer surface of one side of the two threaded sealing sleeves.

[0016] Preferably, the outer surfaces of the two sealing rings are respectively in contact with the inner walls of the two connecting sleeves, and the inner walls of the two sealing rings are respectively in contact with the outer surface of the cable joint body near both ends. The two first fixing nets and the two second fixing nets are respectively fixedly installed on the outer surfaces of the two connecting sleeves. When the two explosion-proof shells are installed together, align the positioning concave rod with the positioning groove, the positioning rod with the positioning slot, and the positioning convex angle rod with the positioning convex angle groove, and then push the two explosion-proof shells together. The structures of the positioning concave rod, the positioning rod and the positioning convex angle rod are different. During installation, they play a positioning role, so that the corrugated metal partitions in the two second protective rings can be symmetrically distributed, providing a more optimized arc guiding path, reducing the arc duration, and contributing to the rapid extinction of the arc.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. When in use, in the present invention, the two first protective rings, the two rupture discs and the two second protective rings form a circular arc extinguishing chamber. The corrugated metal partitions are circumferentially distributed in this space, and the arc has sufficient movement paths in the circumferential direction. When an electric spark is generated, the shape of the corrugated metal partition makes the arc need to travel along the undulating path of the wave, greatly increasing the length of the arc, reducing the arc energy density. When encountering the splitting holes, the arc will be split by the splitting holes to form multiple smaller arc branches, and the energy of the small arc branches is relatively small. At the same time, the insulating oil absorbs the heat generated by the arc, reducing the temperature of the arc. The heat conducting rod can conduct the heat to the outside, which helps to maintain the performance of the protection component. Under the action of the protection component, it is beneficial to eliminate the electric spark and prevent the electric spark from repeatedly impacting the explosion-proof shell, resulting in damage to the explosion-proof shell and affecting the explosion-proof effect.

[0019] 2. When in use, in the present invention, the quartz sand has a very high melting point and thermal stability, and can absorb the energy generated by the explosion, playing a role in buffering and heat insulation. The fireproof mud has good plasticity and fire resistance. When encountering high temperature, the fireproof mud will not burn and will form a hard heat insulation layer to prevent the spread of fire and heat. The explosion-proof shell has a high strength and can withstand the pressure generated by the internal explosion. Its solid structure can prevent the shell from cracking and limit the explosion inside. Under the action of the explosion-proof component, it can prevent the occurrence of an external secondary explosion.

[0020] 3. When in use, in the present invention, when the two explosion-proof shells are installed together, align the positioning concave rod with the positioning groove, the positioning rod with the positioning slot, and the positioning convex angle rod with the positioning convex angle groove, and then push the two explosion-proof shells together. The structures of the positioning concave rod, the positioning rod and the positioning convex angle rod are different. During installation, they play a positioning role, so that the corrugated metal partitions in the two second protective rings can be symmetrically distributed, providing a more optimized arc guiding path, reducing the arc duration, and contributing to the rapid extinction of the arc. Brief Description of the Drawings

[0021] Figure 1 is the first - angle three - dimensional view of an explosion - proof protection device for a cable joint of the present invention;

[0022] Figure 2 is the second - angle three - dimensional view of an explosion - proof protection device for a cable joint of the present invention;

[0023] Figure 3 is the schematic cross - sectional view of the structure of an explosion - proof protection device for a cable joint of the present invention;

[0024] Figure 4 is the schematic expanded cross - sectional view of the explosion - proof component in an explosion - proof protection device for a cable joint of the present invention;

[0025] Figure 5 is the three - dimensional expanded view of the structure of the specified functional block in an explosion - proof protection device for a cable joint of the present invention;

[0026] Figure 6 is the schematic cross - sectional view of the structure of the corrugated metal partition in an explosion - proof protection device for a cable joint of the present invention;

[0027] Figure 7 is the schematic expanded view of the structure of the explosion - proof housing in an explosion - proof protection device for a cable joint of the present invention;

[0028] Figure 8 is the three - dimensional expanded view of the structure of the protection component in an explosion - proof protection device for a cable joint of the present invention;

[0029] Figure 9 of the present invention Figure 3 is the enlarged three - dimensional view of part A.

[0030] In the figure:

[0031] 1. Cable joint body; 2. Explosion - proof component; 201. Connecting sleeve; 202. Explosion - proof housing; 203. First fixing net; 204. Second fixing net; 205. Fireproof mud; 206. Quartz sand; 207. Convex sealing ring; 208. Concave sealing ring; 209. Fixed block; 210. Card slot; 211. Connecting card block; 212. Positioning concave rod; 213. Positioning groove; 214. Threaded hole; 215. Threaded sealing groove; 216. Threaded sealing sleeve; 217. Sealing ring; 218. Fixed groove; 219. Positioning rod; 220. Positioning slot; 221. Positioning convex - angle rod; 222. Positioning convex - angle slot; 223. Fastening bolt; 3. Protection component; 301. First protection ring; 302. Rupture disc; 303. Second protection ring; 304. Corrugated metal partition; 305. Filling cavity; 306. Splitting hole; 307. Heat - conducting rod; 308. First sealing sleeve; 309. Second sealing sleeve. Detailed Description of the Invention

[0032] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1: Please refer to Figures 1 - 9 As shown, the present invention provides a technical solution: an explosion-proof protection device for a cable joint, including a cable joint body 1, an explosion-proof component 2 is arranged on the outer surface of the cable joint body 1, and a protection component 3 is arranged inside the explosion-proof component 2; the protection component 3 includes two first protection rings 301, rupture discs 302 are fixedly installed on the outer surfaces of one sides of the two first protection rings 301, second protection rings 303 are fixedly installed on the outer surfaces of one sides of the two rupture discs 302, a plurality of corrugated metal partitions 304 are fixedly installed on the inner walls of the two second protection rings 303, filling cavities 305 are opened inside the plurality of corrugated metal partitions 304, insulating oil is arranged inside the plurality of filling cavities 305, splitting holes 306 are opened on the outer surfaces of the plurality of corrugated metal partitions 304, two heat-conducting rods 307 are fixedly installed on the outer surfaces of the plurality of corrugated metal partitions 304, a first sealing sleeve 308 is fixedly connected to the outer surface of one side of one of the second protection rings 303, a second sealing sleeve 309 is fixedly connected to the outer surface of one side of the other second protection ring 303, the outer surface of the first sealing sleeve 308 is in contact with the outer surface of the second sealing sleeve 309, one ends of the plurality of heat-conducting rods 307 respectively penetrate through the two first protection rings 301, the two second protection rings 303, the two second fixing nets 204, the two quartz sands 206, the two first fixing nets 203, the two fireproof muds 205 to the outer surfaces of the two explosion-proof shells 202, the outer surfaces of the two first protection rings 301 are respectively fixedly installed at the positions of the outer surfaces of the two connecting sleeves 201 away from the explosion-proof shells 202, the outer surfaces of the two first protection rings 301 are respectively located inside the two second fixing nets 204, and the outer surface of one side of the first protection ring 301 is in contact with the outer surface of one side of the second protection ring 303.

[0034] In this embodiment, during use, the protection component 3 is installed on the outer surface of the cable joint body 1 through the explosion-proof component 2, the cable joint body 1 is wrapped inside the protection component 3, the two second protection rings 303 are tightly attached to each other, and the first sealing sleeve 308 and the second sealing sleeve 309 are tightly attached to each other, increasing the sealing performance at the connection of the two second protection rings 303. The corrugated metal partitions 304 between the two second protection rings 303 are symmetrically distributed, as shown in Figure 3 and Figure 8As shown. Two first protective rings 301, two rupture discs 302 and two second protective rings 303 form a circular arc extinguishing chamber. The circular arc extinguishing chamber can provide a uniform circumferential space. The wavy metal partition 304 can be reasonably distributed in a circular pattern within this space, making full use of the space in the circumferential direction so that the electric arc can also have sufficient movement paths in the circumferential direction. When an electric spark is generated due to a fault at the cable joint body 1, the electric arc will move in the space inside the arc extinguishing chamber. The shape of the wavy metal partition 304 causes the electric arc to travel along the undulating path of the wave, thus greatly increasing the length of the electric arc. The increase in the arc length will lead to a decrease in the arc energy density, making the electric arc easier to extinguish. Additionally, when part of the electric arc travels along the undulating path of the wave and encounters the splitting hole 306, the electric arc will be split by the splitting hole 306 to form multiple smaller electric arc branches. The energy of the small electric arc branches is relatively small and is easier to extinguish. At the same time, the inside of the filling cavity 305 is filled with insulating oil. When the electric arc travels along the wavy metal partition 304, the insulating oil can absorb the heat generated by the electric arc and reduce the temperature of the electric arc, thereby extinguishing the electric arc. The heat conducting rod 307 can conduct the heat absorbed by the wavy metal partition 304 to the outer surface of the explosion-proof housing 202, preventing the temperature inside the arc extinguishing chamber from being too high, helping to maintain the performance of the protection component 3 and enabling it to work properly during multiple arc extinguishing processes. Under the action of the protection component 3, it is beneficial to eliminate the electric spark and prevent the electric spark from repeatedly impacting the explosion-proof housing 202, resulting in damage to the explosion-proof housing 202 and affecting the explosion-proof effect. This solves the problem that when the explosion-proof housing of the cable joint is in use, frequent electric spark impacts will cause ablation, deformation, etc. on the inner wall of the explosion-proof housing, resulting in metal fatigue, reducing the strength of the explosion-proof housing, being easily damaged, and greatly reducing the explosion-proof effect of the explosion-proof housing.

[0035] Embodiment 2: As Figures 1 - 9As shown, the explosion-proof component 2 includes two connecting sleeves 201. Explosion-proof shells 202 are fixedly installed on the outer surfaces of the two connecting sleeves 201. First fixing nets 203 are fixedly installed inside the two explosion-proof shells 202. Second fixing nets 204 are fixedly installed on the inner walls of the two first fixing nets 203. Fireproof mud 205 is arranged on the outer surfaces of the two first fixing nets 203. Quartz sand 206 is arranged on the outer surfaces of the two second fixing nets 204. A convex sealing ring 207 is fixedly connected to the outer surface of one side of one explosion-proof shell 202. A concave sealing ring 208 is fixedly connected to the outer surface of one side of the other explosion-proof shell 202. The outer surface of the convex sealing ring 207 is in contact with the outer surface of the concave sealing ring 208. Three fixing blocks 209 are fixedly installed on the outer surface of the other explosion-proof shell 202 near the concave sealing ring 208. Card slots 210 are opened inside the three fixing blocks 209. Three connecting blocks 211 are fixedly installed on the outer surface of one explosion-proof shell 202 near the convex sealing ring 207. A positioning concave rod 212 is fixedly installed on the outer surface of one side of one connecting block 211 near the top. A positioning groove 213 is opened on the outer surface of one fixing block 209 near the top. One end of the positioning concave rod 212 is movably embedded inside the positioning groove 213. A positioning rod 219 is fixedly installed on the outer surface of one side of the other connecting block 211 near the top. A positioning slot 220 is opened on the outer surface of the other fixing block 209 near the top. One end of the positioning rod 219 is movably embedded inside the positioning slot 220. A positioning convex angle rod 221 is fixedly installed on the outer surface of one side of another connecting block 211 near the top. A positioning convex angle slot 222 is opened on the outer surface of the other fixing block 209 near the top. One end of the positioning convex angle rod 221 is movably embedded inside the positioning convex angle slot 222. Threaded holes 214 are opened at the tops of the three fixing blocks 209. Fixing grooves 218 are opened on one side inside the three card slots 210. Tightening bolts 223 are threadedly embedded inside the three threaded holes 214. The outer surfaces of the three connecting blocks 211 are respectively movably embedded inside the three card slots 210. The two connecting sleeves 201 are respectively movably sleeved on the outer surface of the cable joint body 1 near both ends. Threaded sealing grooves 215 are opened inside the two connecting sleeves 201. Threaded sealing sleeves 216 are threadedly embedded inside the two threaded sealing grooves 215. The two threaded sealing sleeves 216 are respectively threadedly sleeved on the outer surface of the cable joint body 1 near both ends. Sealing rings 217 are fixedly installed on the outer surfaces of one side of the two threaded sealing sleeves 216. The outer surfaces of the two sealing rings 217 are respectively in contact with the inner walls of the two connecting sleeves 201. The inner walls of the two sealing rings 217 are respectively in contact with the outer surface of the cable joint body 1 near both ends. The two first fixing nets 203 and the two second fixing nets 204 are respectively fixedly installed on the outer surfaces of the two connecting sleeves 201.

[0036] In this embodiment, during use, two explosion-proof shells 202 are pushed together so that the convex sealing ring 207 is snapped into the concave sealing ring 208, and the connecting clamping block 211 is snapped into the clamping groove 210. Then, three fastening bolts 223 are screwed so that they pass through the connecting clamping block 211 and enter the fixing groove 218, connecting the connecting clamping block 211 and the fixing block 209 together, thereby fixing the two explosion-proof shells 202 together. Next, two threaded sealing sleeves 216 are screwed so that they are spirally inserted into the threaded sealing groove 215 and are threadedly sleeved on the outer surface of the cable joint body 1, connecting the connecting sleeve 201 and the cable joint body 1 together, thereby installing the explosion-proof component 2 on the outer surface of the cable joint body 1. At the same time, the sealing ring 217 is tightly snapped between the connecting sleeve 201 and the cable joint body 1 to prevent dust and flammable gases in the external air from entering the interior of the explosion-proof component 2. The fireproof mud 205 is located between the first fixing net 203 and the explosion-proof shell 202, and the quartz sand 206 is located between the first fixing net 203 and the second fixing net 204. When an explosion accidentally occurs in the cable joint body 1, it will cause the two rupture discs 302 to rupture. Then, the flame generated by the explosion will enter the interior of the explosion-proof shell 202. The quartz sand 206 is an inorganic mineral with a very high melting point and thermal stability. It can absorb the energy generated by the explosion, playing a role in buffering and heat insulation. Because there are certain gaps between the quartz sand 206 particles, it can disperse the impact force generated by the explosion, and its non-combustible property can prevent the spread of the flame. The fireproof mud 205 has good plasticity and fire resistance. When exposed to high temperatures, the fireproof mud 205 will not burn and will form a hard heat insulation layer to prevent the spread of the flame and heat. The explosion-proof shell 202 has a relatively high strength and can withstand the pressure generated by the internal explosion. Its solid structure can prevent the outer shell from rupturing and confine the explosion inside. Under the action of the explosion-proof component 2, it can prevent the occurrence of an external secondary explosion.

[0037] Embodiment 3: As Figures 1 - 2 and Figures 4 - 7As shown, the explosion-proof component 2 includes two connecting sleeves 201. Explosion-proof shells 202 are fixedly installed on the outer surfaces of the two connecting sleeves 201. Three connecting blocks 211 are fixedly installed on the outer surface of one of the explosion-proof shells 202 near the convex sealing ring 207. A positioning concave rod 212 is fixedly installed on the outer surface of one side of one of the connecting blocks 211 near the top. A positioning groove 213 is opened on the outer surface of one of the fixing blocks 209 near the top. One end of the positioning concave rod 212 is movably embedded in the interior of the positioning groove 213. A positioning rod 219 is fixedly installed on the outer surface of one side of another connecting block 211 near the top. A positioning slot 220 is opened on the outer surface of the other fixing block 209 near the top. One end of the positioning rod 219 is movably embedded in the interior of the positioning slot 220. A positioning convex angle rod 221 is fixedly installed on the outer surface of one side of another connecting block 211 near the top. A positioning convex angle slot 222 is opened on the outer surface of the other fixing block 209 near the top. One end of the positioning convex angle rod 221 is movably embedded in the interior of the positioning convex angle slot 222.

[0038] In this embodiment, during use, the structure of the positioning concave rod 212 matches the structure of the positioning groove 213, the structure of the positioning rod 219 matches the structure of the positioning slot 220, and the structure of the positioning convex angle rod 221 matches the structure of the positioning convex angle slot 222. When installing the two explosion-proof shells 202 together, align the positioning concave rod 212 with the positioning groove 213, align the positioning rod 219 with the positioning slot 220, and align the positioning convex angle rod 221 with the positioning convex angle slot 222. Then push the two explosion-proof shells 202 together so that the connecting blocks 211 are embedded in the card slots 210. The structures of the positioning concave rod 212, the positioning rod 219, and the positioning convex angle rod 221 are different. During installation, they play a positioning role, enabling the wave-shaped metal partitions 304 in the two second protection rings 303 to be symmetrically distributed after the explosion-proof component 2 and the protection component 3 are installed together. The symmetrically distributed wave-shaped metal partitions 304 can make the electric field distribution inside the arc extinguishing chamber more uniform, providing a more optimized arc guiding path. Under the dual action of the arc extinguishing chamber and the partition shape, the arc will shuttle back and forth between the symmetric wave-shaped paths, thereby further increasing the length of the arc, reducing the arc duration, and contributing to the rapid extinguishing of the arc.

[0039] The effects achieved by the entire mechanism and its working principle are as follows: Push the two explosion-proof shells 202 together, so that the convex sealing ring 207 is clamped inside the concave sealing ring 208, and the connecting block 211 is clamped inside the clamping groove 210. Then, turn the three fastening bolts 223 into the fixing groove 218 to fix the two explosion-proof shells 202 together. Next, turn the two threaded sealing sleeves 216 so that they are screwed into the threaded sealing groove 215 and are sleeved on the outer surface of the cable joint body 1 in a threaded manner, and install the explosion-proof component 2 on the outer surface of the cable joint body 1. At this time, the cable joint body 1 is wrapped inside the protection component 3. The two first protection rings 301, the two rupture discs 302, and the two second protection rings 303 form a circular arc extinguishing chamber. When an electric spark is generated due to a fault at the cable joint body 1, the electric arc will move in the space inside the arc extinguishing chamber. The shape of the corrugated metal partition 304 makes the electric arc need to travel along the undulating path of the wave, making it easier for the electric arc to extinguish. When encountering the splitting hole 306, the electric arc will be split by the splitting hole 306 to form multiple smaller electric arc branches, which are easier to extinguish. At the same time, the inside of the filling cavity 305 is filled with insulating oil. When the electric arc travels along the corrugated metal partition 304, the insulating oil can absorb the heat generated by the electric arc and reduce the temperature of the electric arc, thereby extinguishing the electric arc. The heat conducting rod 307 can conduct the heat absorbed by the corrugated metal partition 304 to the outer surface of the explosion-proof shell 202. Under the action of the protection component 3, it is beneficial to eliminate the electric spark and prevent the electric spark from repeatedly impacting the explosion-proof shell 202, resulting in damage to the explosion-proof shell 202 and affecting the explosion-proof effect. The quartz sand 206 has a very high melting point and thermal stability and can absorb the energy generated by the explosion, playing a role in buffering and heat insulation. The fireproof mud 205 has good plasticity and fire resistance. When encountering high temperature, the fireproof mud 205 will not burn and will form a hard heat insulation layer to prevent the spread of fire and heat. The explosion-proof shell 202 has a relatively high strength and can withstand the pressure generated by the internal explosion. Its solid structure can prevent the outer shell from cracking and limit the explosion inside. Under the action of the explosion-proof component 2, it can prevent the occurrence of an external secondary explosion. When installing the two explosion-proof shells 202 together, align the positioning concave rod 212 with the positioning groove 213, the positioning rod 219 with the positioning groove 220, and the positioning convex angle rod 221 with the positioning convex angle groove 222. Then, push the two explosion-proof shells 202 together so that the connecting block 211 is embedded in the clamping groove 210. The positioning concave rod 212, the positioning rod 219, and the positioning convex angle rod 221 have different structures. During installation, they play a positioning role, so that after the explosion-proof component 2 and the protection component 3 are installed together, the corrugated metal partitions 304 in the two second protection rings 303 can be symmetrically distributed. The symmetrically distributed corrugated metal partitions 304 can make the electric field distribution inside the arc extinguishing chamber more uniform, provide a more optimized electric arc guiding path, and contribute to the rapid extinction of the electric arc.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable joint explosion-proof protection device, comprising a cable joint body (1), characterized in that: An explosion-proof component (2) is arranged on the outer surface of the cable connector body (1), and a protective component (3) is arranged inside the explosion-proof component (2); The protection component (3) comprises two first protection rings (301), one side outer surface of the two first protection rings (301) is fixedly mounted with a rupture disc (302), one side outer surface of the two rupture discs (302) is fixedly mounted with a second protection ring (303), the inner walls of the two second protection rings (303) are fixedly mounted with a plurality of corrugated metal partitions (304), a filling cavity (305) is provided inside the plurality of corrugated metal partitions (304), insulating oil is provided inside the plurality of filling cavities (305), a splitting hole (306) is provided on the outer surface of the plurality of corrugated metal partitions (304), and two heat-conducting rods (307) are fixedly mounted on the outer surface of the plurality of corrugated metal partitions (304).

2. The cable joint explosion-proof protection device according to claim 1, characterized in that: The explosion-proof component (2) comprises two connecting sleeves (201), the outer surfaces of the two connecting sleeves (201) are fixedly mounted with explosion-proof shells (202), the interiors of the two explosion-proof shells (202) are fixedly mounted with first fixed nets (203), the inner walls of the two first fixed nets (203) are fixedly mounted with second fixed nets (204), the outer surfaces of the two first fixed nets (203) are provided with fireproof mud (205), and the outer surfaces of the two second fixed nets (204) are provided with quartz sand (206).

3. The cable joint explosion-proof protection device according to claim 2, characterized in that: One side outer surface of one of the second protective rings (303) is fixedly connected to a first sealing sleeve (308), and one side outer surface of another second protective ring (303) is fixedly connected to a second sealing sleeve (309), the outer surface of the first sealing sleeve (308) is in contact with the outer surface of the second sealing sleeve (309), and one end of a plurality of the heat-conducting rods (307) are respectively fixedly passed through two first protective rings (301), two second protective rings (303), two second fixed nets (204), two quartz sands (206), two first fixed nets (203), two fireproof muds (205) to the outer surfaces of two explosion-proof shells (202).

4. The cable joint explosion-proof protection device according to claim 3, characterized in that: The outer surfaces of the two first protective rings (301) are respectively fixedly mounted on the outer surfaces of the two connecting sleeves (201) away from the explosion-proof housing (202), and the outer surfaces of the two first protective rings (301) are respectively located inside the two second fixed nets (204), and the outer surface of one side of the first protective ring (301) is in contact with the outer surface of one side of the second protective ring (303).

5. The cable joint explosion-proof protection device according to claim 2, characterized in that: A convex sealing ring (207) is fixedly connected to the outer surface of one side of one of the explosion-proof shells (202), and a concave sealing ring (208) is fixedly connected to the outer surface of one side of the other explosion-proof shell (202), the outer surface of the convex sealing ring (207) is in contact with the outer surface of the concave sealing ring (208), and three fixing blocks (209) are fixedly installed on the outer surface of the other explosion-proof shell (202) near the concave sealing ring (208), and the insides of the three fixing blocks (209) are all provided with card slots (210).

6. The cable joint explosion-proof protection device according to claim 5, characterized in that: Three connecting blocks (211) are fixedly installed on the outer surface of one of the explosion-proof shells (202) near the convex sealing ring (207), a positioning recessed rod (212) is fixedly installed on the outer surface of one side of one of the connecting blocks (211) near the top, a positioning groove (213) is provided on the outer surface of one of the fixing blocks (209) near the top, and one end of the positioning recessed rod (212) is movably embedded in the interior of the positioning groove (213).

7. The cable joint explosion-proof protection device according to claim 6, characterized in that: A positioning rod (219) is fixedly installed on the outer surface of one side of another connecting block (211) near the top, a positioning groove (220) is opened on the outer surface of another fixing block (209) near the top, one end of the positioning rod (219) is movably embedded in the interior of the positioning groove (220), and a positioning convex angle rod (221) is fixedly installed on the outer surface of one side of another connecting block (211) near the top, and a positioning convex angle groove (222) is opened on the outer surface of another fixing block (209) near the top, one end of the positioning convex angle rod (221) is movably embedded in the interior of the positioning convex angle groove (222).

8. The cable joint explosion-proof protection device according to claim 7, characterized in that: The tops of the three fixing blocks (209) are each provided with a threaded hole (214), one side of the inside of the three clamping slots (210) is each provided with a fixing slot (218), the insides of the three threaded holes (214) are each threadedly embedded with a fastening bolt (223), and the outer surfaces of the three connecting clamping blocks (211) are respectively movably embedded in the insides of the three clamping slots (210).

9. The cable joint explosion-proof protection device according to claim 8, characterized in that: The two connecting sleeves (201) are movably mounted on the outer surface of the cable connector body (1) near the two ends, the two connecting sleeves (201) are provided with threaded sealing grooves (215) inside, the two threaded sealing grooves (215) are threadedly embedded with threaded sealing sleeves (216) inside, the two threaded sealing sleeves (216) are threadedly mounted on the outer surface of the cable connector body (1) near the two ends, and a sealing ring (217) is fixedly installed on one side of the outer surface of the two threaded sealing sleeves (216).

10. The cable joint explosion-proof protection device according to claim 9, characterized in that: The outer surfaces of the two sealing rings (217) are respectively in contact with the inner walls of the two connecting sleeves (201), and the inner walls of the two sealing rings (217) are respectively in contact with the outer surface of the cable connector body (1) near both ends, and the two first fixing nets (203) and the two second fixing nets (204) are respectively fixedly mounted on the outer surfaces of the two connecting sleeves (201).

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