CN116191339B - Protective device and protective method for intermediate connector of power cable - Google Patents
Protective device and protective method for intermediate connector of power cable Download PDFInfo
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- CN116191339B CN116191339B CN202310125333.6A CN202310125333A CN116191339B CN 116191339 B CN116191339 B CN 116191339B CN 202310125333 A CN202310125333 A CN 202310125333A CN 116191339 B CN116191339 B CN 116191339B
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- shell
- pushing
- protection device
- groove
- explosion
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000001681 protective effect Effects 0.000 title description 4
- 238000009423 ventilation Methods 0.000 claims abstract description 27
- 238000004880 explosion Methods 0.000 claims abstract description 23
- 210000000078 claw Anatomy 0.000 claims description 27
- 230000001012 protector Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000002269 spontaneous effect Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 210000001503 joint Anatomy 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention relates to the technical field of cable intermediate connectors, in particular to a power cable intermediate connector protection device and a protection method, comprising a shell and a protection device; the cable fixing device comprises an outer shell, an inner shell, a cable, a plurality of outer shell covers, a plurality of inner shell covers and a plurality of outer shell covers, wherein the outer shell covers are combined to form a cavity; the top moving plate is arranged in the first gap, and the inner shell can drive the top moving plate to approach the outer shell; the air bag is arranged on the inner wall of the shell at one side of the top movable plate, air is stored in the air bag, an air vent groove is formed in the side wall of the shell, and the air bag is communicated with the air vent groove; through holes are formed in two ends of the shell, and the plugging blocks are arranged on the wall of the through holes; the pushing component is arranged above the plugging block and is communicated with the ventilation groove, and the pushing component can push the plugging block to extrude the cable passing through the through hole, so that spontaneous combustion of the cable can not occur even if the explosion phenomenon occurs.
Description
Technical Field
The invention relates to the technical field of cable intermediate connectors, in particular to a protection device and a protection method for a power cable intermediate connector.
Background
The existing fireproof measures are to add copper sleeves, nuts or ceramic lamp elements in the cable intermediate connectors for fireproof, so that the whole structure of the connecting connectors is complex, the installation operation is troublesome, the cable intermediate connectors cannot be adapted to different cable intermediate connectors, but most of the structures are complex.
Chinese patent CN110994533B discloses a cable intermediate joint, which comprises an upper fixed connection part, a lower fixed connection part and a rubber sleeve for negative pressure expansion, wherein the upper fixed connection part and the lower fixed connection part are connected through fastening screws, and form a closed cavity for accommodating a cable connection point, the rubber sleeve is arranged at the cable connection point, two ends of the rubber sleeve are respectively and tightly wrapped with cables at two sides of the cable connection point, the upper fixed connection part is provided with an air suction channel, negative pressure is generated in the air suction closed cavity to expand the rubber sleeve, the upper fixed connection part comprises an upper shell, an air pipe, a communication hole, an air pipe slot, an end pressing plate, a guide rod, a supporting and tightening lugs, the outer edge of the upper shell is provided with a plurality of tightening lugs, the two ends of the upper shell are of an adduction structure, the two end pressing plates are correspondingly arranged at two ends of the upper shell, two groups of supporting and are arranged in the upper shell, two groups of supporting and are provided with gaps, the supporting and the supporting plate is provided with a guide rod; the air pipe is composed of a main pipe body, an air core, a sealing cover, an elastic rubber pipe, a compression screw sleeve, a limiting ring, an air passage and a sealing joint, wherein one end of the main pipe body is arranged in a communication hole through the sealing joint, the sealing cover is in threaded connection with the other end of the main pipe body, the limiting ring is arranged in the main pipe body, and the air core is arranged in the main pipe body through the limiting ring and is fixed through the compression screw sleeve.
The scheme is that the structure is simplified, but when explosion happens, flame between the cables still can be discharged through gaps between the upper shell and the lower shell, and meanwhile after explosion in the shell is generated, the shell is inevitably loosened, so that external oxygen can be caused to flow into the shell, the cables in the shell are in a high-temperature state at the moment, the insulating layer on the outer surface of the cables can be burnt, and after the shell is burnt through, the insulating layer of the whole cable can be made of a igniting material.
Disclosure of Invention
According to the protection device and the protection method for the middle joint of the power cable, explosion occurs at the joint of the cable, the inner shell is pushed to be separated from the clamping connection of the cable by explosion impact force, the inner shell pushes the top moving plate to approach to the air bag on the inner wall of the outer shell and extrudes the air bag, gas in the air bag flows into the ventilation groove, the ventilation groove conveys the flowing air to the pushing component, the pushing component is activated, the pushing component drives the plugging block to plug the through hole, meanwhile, the air pressure in the outer shell can be ensured to be increased, after the plugging block clamps the cable at the through hole, the outer shell is further provided with the pressure relief valve, the too high pressure can be discharged through the pressure relief valve, so that external oxygen cannot enter the outer shell, and under the anaerobic condition, materials in the outer shell cannot be combusted due to the lack of the combustion adjusting piece.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a power cable intermediate joint protection device comprises a shell and a protection device; the protection device comprises an inner shell, a top movable plate, an air bag, a plugging block and a pushing assembly; the cable fixing device comprises two outer shells, two inner shells, a first gap, a second gap and a third gap, wherein the two outer shells are of arc structures and are covered to form a cavity, the two inner shells are symmetrically arranged in the cavity, a cable penetrates through the cavity, the inner shells fix the cable, and the first gap is reserved between the inner shells and the outer shells; the top moving plate is arranged in the first gap, and the inner shell can drive the top moving plate to approach the outer shell; the air bag is arranged on the inner wall of the shell at one side of the top movable plate, air is stored in the air bag, an air vent groove is formed in the side wall of the shell, and the air bag is communicated with the air vent groove; through holes are formed in two ends of the shell, and the plugging blocks are arranged on the wall of the through holes; the pushing component is arranged above the plugging block and is communicated with the ventilation groove, and the pushing component can push the plugging block to squeeze the cable passing through the through hole.
Preferably, the pushing assembly comprises a pushing block, a pushing claw and a protruding block; a pushing groove is formed in the side wall of one end of the shell, the pushing groove is communicated with the ventilation groove, and the pushing block can be arranged in the pushing groove in a sliding manner; one end of the pushing claw is hinged to the lower part of the pushing block; the lug is fixedly arranged on the side wall of the plugging block, and one end of the pushing claw away from the pushing block is abutted with the lug.
Preferably, the protection device further comprises a jacking rod, a sliding sleeve and a spring; the top movable rod is fixedly arranged on one side of the top movable plate, which is close to the inner shell; the sliding sleeve is fixedly arranged on one side of the inner shell, which is close to the top moving plate, along the axis of the top moving rod, and the top moving rod is in sliding fit with the sliding sleeve; a second gap is reserved between the jacking rod and the bottom of the sliding sleeve, and the spring is arranged in the second gap.
Preferably, the protection device further comprises a deflection assembly comprising an explosion-proof panel; the explosion-proof board is the arc structure, and the one end setting of explosion-proof board is on the inner wall of shell, and the explosion-proof board sets up along vertical direction, and the explosion-proof board shelters from the junction of two shell lateral parts.
Preferably, the deflection assembly further comprises a clamping assembly, and the clamping assembly comprises a clamping block and a clamping groove; the clamping groove is formed in the side wall of the explosion-proof plate along the extending direction of the cable; the clamping block is fixedly arranged on the inner wall of the shell and is in clamping and unlocking fit with the clamping groove.
Preferably, the protection device further comprises a one-way valve; the one-way valve is arranged in the ventilation groove.
Preferably, the protection device further comprises a hook claw; the upper portion of the top movable plate is provided with a hooking groove in a penetrating mode, the hooking claw is vertically and fixedly arranged on the inner wall of the shell, the lower portion of the hooking claw is matched with the hooking groove in a clamping mode, and the hooking claw is made of elastic plastic materials.
Preferably, the protection device further comprises a guide rod; the vertical fixed setting of guide bar is on the inner wall of shell, and the guide bar runs through in top movable plate and inner shell respectively.
Preferably, the protection device further comprises a pressure relief valve; the relief valve is fixed to be set up on the lateral wall of shell, and the relief valve is used for discharging the unnecessary air in the shell.
The invention also relates to a protection method for the middle joint of the power cable, which comprises the following specific steps:
s1, explosion occurs at the cable connection part, and the explosion impact force pushes the inner shell to be separated from the clamping connection of the cable;
s2, the inner shell pushes the top moving plate to approach towards the air bag on the inner wall of the outer shell, the air bag is extruded, and gas in the air bag flows into the ventilation groove;
s3, the ventilation groove conveys the inflow air to the pushing assembly, the pushing assembly is activated, and the pushing assembly drives the plugging block to plug the through hole.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the inner shell, the top moving plate, the air bag, the plugging block and the pushing component are arranged, explosion occurs at the cable connection part, the inner shell is pushed by explosion impact force to be separated from the clamping connection of the cable, the inner shell pushes the top moving plate to approach the air bag on the inner wall of the outer shell and squeeze the air bag, gas in the air bag flows into the ventilation groove, the ventilation groove conveys the flowing air to the pushing component, the pushing component is activated, the plugging block is driven by the pushing component to plug the through hole, meanwhile, the air pressure in the outer shell can be increased, after the cable at the through hole is clamped by the plugging block, the excessive pressure can be discharged through the pressure release valve, so that external oxygen can not enter the inner part of the outer shell, and under the anaerobic condition, the material in the outer shell can not be combusted due to the lack of the combustion adjusting component.
Drawings
FIG. 1 is a schematic perspective view of a power cable intermediate joint protection device;
FIG. 2 is a side view of a power cable intermediate joint guard;
FIG. 3 is a schematic cross-sectional view of the power cable intermediate joint protection device at A-A of FIG. 2;
FIG. 4 is an enlarged partial schematic view of the power cable intermediate joint protector at B of FIG. 3;
FIG. 5 is an enlarged partial schematic view of the power cable intermediate joint protector at C of FIG. 3;
FIG. 6 is a partially enlarged schematic illustration of the power cable intermediate joint protector at D of FIG. 3;
FIG. 7 is a schematic perspective view of a power cable intermediate joint guard with a portion of the housing removed;
FIG. 8 is an enlarged partial schematic view of the power cable intermediate joint protector at E of FIG. 7;
FIG. 9 is a schematic perspective view of the power cable intermediate connector shield device with the upper side housing removed;
fig. 10 is a perspective view of a power cable intermediate connector protector with portions of the outer housing, top plate, and inner housing removed.
The reference numerals in the figures are:
1-a housing;
2-a protection device;
21-an inner shell;
22-top movable plate; 221-pushing a movable rod; 222-sliding sleeve; 223-spring; 224-guide bar; 225-hooking claw;
23-an air bag; 231-a one-way valve;
24-plugging blocks;
25-pushing assembly; 251-pushing block; 252-pushing claw; 253-bump;
26-a deflection assembly; 261-explosion-proof plate; 262-clamping assembly; 2621-snap-fit blocks;
27-pressure relief valve.
Description of the embodiments
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Referring to fig. 1-5: the utility model provides a power cable intermediate head protector, includes shell 1 and protection device 2; the protection device 2 comprises an inner shell 21, a top movable plate 22, an air bag 23, a blocking block 24 and a pushing assembly 25; the cable fixing device comprises two outer shells 1, wherein the outer shells 1 are of arc structures, the two outer shells 1 are covered to form a cavity, the two inner shells 21 are symmetrically arranged in the cavity, cables penetrate through the cavity, the inner shells 21 fix the cables, and a first gap is reserved between the inner shells 21 and the outer shells 1; the top moving plate 22 is arranged in the first gap, and the inner shell 21 can drive the top moving plate 22 to approach the outer shell 1; the air bag 23 is arranged on the inner wall of the shell 1 at one side of the top movable plate 22, air is stored in the air bag 23, an air vent groove is formed in the side wall of the shell 1, and the air bag 23 is communicated with the air vent groove; through holes are formed in two ends of the shell 1, and the plugging blocks 24 are arranged on the walls of the through holes; the pushing component 25 is arranged above the plugging block 24, the pushing component 25 is communicated with the ventilation groove, and the pushing component 25 can push the plugging block 24 to squeeze the cable passing through the through hole.
When the installation is carried out, two outer shells 1 are required to be jointed together, through holes are formed in the two ends of the outer shells 1, when the outer shells 1 are not jointed, the through holes in the outer shells 1 are semicircular, after the two inner shells 21 are jointed, the two through holes can form a complete circle, so that after the installation is finished, a cable can pass through the through holes in the outer shells 1, each outer shell 1 is provided with the inner shells 21, when the two outer shells 1 are jointed, the inner shells 21 on the outer shells 1 are jointed with each other, after the two inner shells 21 are jointed, the inner shells 21 can clamp the cable passing through the outer shells 1, and the stability of the cable in the outer shells 1 in the connection is guaranteed. When the cable explodes, the pressure of the air in the shell 1 can rise sharply, the pressurized air can promote the inner shell 21 to move, the inner shell 21 drives the top movable plate 22 to approach the inner wall of the shell 1, when the top movable plate 22 moves to the position of the air bag 23, the top movable plate 22 presses the air bag 23, the air in the air bag 23 can be extruded into the ventilation groove, and then the air in the ventilation groove acts on the pushing component 25, the pushing component 25 can drive the plugging block 24 to extrude the cable, so that the plugging function of the plugging block 24 on the through holes can be realized, the situation that the air outside the shell 1 is flushed into the shell 1 is prevented, meanwhile, the temperature in the shell 1 can be gradually reduced along with the end of explosion, and as the condition of combustion basically needs two, one is enough temperature, one is enough oxygen, the situation that the air in the shell 1 is prevented from entering the shell 1 through the plugging of the plugging block 24, the oxygen content in the ventilation groove is further reduced, the oxygen in the shell 1 can be quickly consumed, the situation that the oxygen in the shell 1 is not supplemented, even if the condition of the oxygen is high in the shell 1, the condition that the explosion is not generated, even if the condition of the cable is not combusted, the condition that the outer side of the cable is not combusted, and the phenomenon of the spontaneous combustion can not occur, and even the condition is guaranteed.
Referring to fig. 3 and 4: the pushing assembly 25 includes a pushing block 251, a pushing claw 252, and a bump 253; a pushing groove is formed in the side wall of one end of the shell 1, the pushing groove is communicated with the ventilation groove, and the pushing block 251 can be arranged in the pushing groove in a sliding manner; one end of the pushing claw 252 is hinged to the lower portion of the pushing block 251; the bump 253 is fixedly arranged on the side wall of the plugging block 24, and one end of the pushing claw 252 away from the pushing block 251 is abutted against the bump 253.
When the cable knocks, the top moving plate 22 extrudes the air bag 23, at this time, air in the air bag 23 can flow into the ventilation groove, and because the ventilation groove is communicated with the pushing groove, air in the ventilation groove can flow into the pushing groove, and because the pushing block 251 can be slidably arranged in the pushing groove, the pushing block 251 can be pushed by the air flowing into the pushing groove so as to generate a sliding phenomenon, and because the pushing claw 252 at the lower part of the pushing block 251 is abutted with the convex block 253, when the pushing block 251 slides under the pushing of the air, the pushing claw 252 at the lower part of the pushing block 251 can necessarily push the convex block 253 to move, and because the convex block 253 is fixedly connected with the plugging block 24, the plugging block 24 can be pushed.
Referring to fig. 3 and 6: the protection device 2 further comprises a push rod 221, a sliding sleeve 222 and a spring 223; the top moving rod 221 is fixedly arranged on one side of the top moving plate 22 close to the inner shell 21; the sliding sleeve 222 is fixedly arranged on one side of the inner shell 21, which is close to the jacking plate 22, along the axis of the jacking rod 221, and the jacking rod 221 is in sliding fit with the sliding sleeve 222; a second gap is formed between the ejector pin 221 and the bottom of the sliding sleeve 222, and a spring 223 is disposed in the second gap.
When the cable knocks, impact force can appear at the cable knocking position, the impact force can act on the inner shell 21, so the inner shell 21 can drive the sliding sleeve 222 arranged at the upper part of the inner shell to move, the sliding sleeve 222 and the jacking rod 221 slide relatively, the spring 223 arranged in the second gap can be extruded by the sliding sleeve 222 and the jacking rod 221, and the reaction force of the spring 223 acts on the jacking rod 221, so that the jacking plate 22 arranged on the jacking rod 221 is pushed, and the jacking plate 22 extrudes the air bag 23. Meanwhile, when the cable is exploded, the spring 223 arranged in the second gap can slow down the impact force, so that the top moving plate 22 is prevented from directly striking on the shell 1 under the action of the impact force, and the shell 1 is prevented from being damaged.
Referring to fig. 9 and 10: the protection device 2 further comprises a deflection assembly 26, the deflection assembly 26 comprising an explosion-proof panel 261; the explosion-proof board 261 is the arc structure, and the one end setting of explosion-proof board 261 is on the inner wall of shell 1, and explosion-proof board 261 sets up along vertical direction, and the junction of two shell 1 lateral parts is sheltered from to the explosion-proof board 261.
Because shell 1 is provided with two, if do not set up explosion proof plate 261, then when the cable appears exploding, the produced impact force can move to the gap between two shells 1, impact force can push away the gap, so can cause the damage of shell 1, and after setting up explosion proof plate 261, after impact force produces, the expanded air can move to the gap between two shells 1, but because set up explosion proof plate 261 on the inner wall of shell 1, the air of so expanding can strike on explosion proof plate 261, under the guide of explosion proof plate 261, the air of expansion can move towards the both ends of shell 1, because the distance of two shells 1 vertical direction is less than the distance at both ends in shell 1 horizontal direction, here shell 1 horizontal direction refers to the extending direction of cable, two shells 1 vertical direction and cable's extending direction mutually perpendicular, just because the distance of two shells 1 vertical direction is less than the distance at both ends in shell 1 horizontal direction, so under the effect of shock wave, top movable plate 22 can act on 23 earlier, when the shock wave that is guided by explosion proof plate 261 reaches shell 1's both ends 24, can not block up the shell 1 so, can not block up the shell 1.
Referring to fig. 9 and 10: the deflection assembly 26 also includes a clamping assembly 262, the clamping assembly 262 including a clamping block 2621 and a clamping slot; the clamping groove is formed in the side wall of the explosion-proof plate 261 along the extending direction of the cable; the clamping block 2621 is fixedly arranged on the inner wall of the shell 1, and the clamping block 2621 is in clamping fit with the clamping groove.
Because explosion-proof board 261 is arc structure, and the one end setting of explosion-proof board 261 is on the inner wall of shell 1, after shock wave strikes explosion-proof board 261, deformation can appear in explosion-proof board 261, the expansion end of explosion-proof board 261 can slide on another shell 1 inner wall promptly, in order to guarantee that explosion-proof board 261 has stable explosion-proof performance, just set up joint piece 2621 on the inner wall of shell 1, set up the joint groove simultaneously on explosion-proof board 261, so after two shells 1 joint, the joint groove that is located on explosion-proof board 261 can cooperate with the joint piece 2621 joint on the shell 1 inner wall, shock wave promotes the air and can be guided to the both ends of shell 1 by explosion-proof board 261.
Referring to fig. 5: the protection device 2 further comprises a one-way valve 231; the check valve 231 is disposed in the vent groove.
After the detonation is finished, the air pressure in the shell 1 gradually decreases, so that the air pressure in the shell 1 is lower than the air pressure in the vent groove, the condition that the air in the vent groove jacks up the air bag 23 is caused by the air in the vent groove if the one-way valve 231 is not arranged, the through hole is loosened by the plugging block 24, so that the outside air can enter the shell 1, and the air exhausted through the vent groove can not flow back into the vent groove after the one-way valve 231 is arranged, so that the plugging block 24 can plug the through hole after being activated.
Referring to fig. 9 and 10: the protection device 2 further comprises a catch 225; the upper part of the top movable plate 22 is provided with a hooking groove in a penetrating way, a hooking claw 225 is vertically and fixedly arranged on the inner wall of the shell 1, the lower part of the hooking claw 225 is matched with the hooking groove in a clamping way, and the hooking claw 225 is made of elastic plastic materials.
Because the top movable plate 22 and the inner shell 21 have certain weight, and the check valve 231 also can be invalid because of long-time unused, after the top movable plate 22 presses the air bag 23, the hook claw 225 can be pushed and bent by the top movable plate 22, and the vertical state is restored after the hook claw 225 passes through the hook groove, and after the hook claw 225 passes through the hook groove, the hook claw 225 is convenient for the hook groove to be clamped and matched, so that the top movable plate 22 can not fall off, the hooked top movable plate 22 can always press the air bag 23, and the blocking block 24 can not be loosened.
Referring to fig. 9 and 10: the protection device 2 further comprises a guide bar 224; the guide rods 224 are vertically and fixedly arranged on the inner wall of the outer shell 1, and the guide rods 224 respectively penetrate through the top movable plate 22 and the inner shell 21.
The guide rod 224 can ensure that the top movable plate 22 is stably pushed to move by impact force, because the position of the cable cannot be determined when the cable is exploded, and if the explosion position has deviation, the impact force can push the top movable plate 22 to deviate.
Referring to fig. 1 and 2: the protection device 2 further comprises a pressure relief valve 27; a relief valve 27 is fixedly provided on a side wall of the housing 1, the relief valve 27 being used for discharging excess air in the housing 1.
When the explosion happens, the plugging block 24 plugs the through hole, the air expanded in the shell 1 cannot be discharged, the shell 1 is damaged under the continuously-rising air pressure, and in order to avoid the continuously-rising air pressure in the shell 1, the pressure release valve 27 is arranged on the shell 1, so that the air expanded in the shell 1 can be discharged in time.
Referring to fig. 1-10: 10. the invention also relates to a protection method for the middle joint of the power cable, which adopts the protection device for the middle joint of the power cable according to any one of claims 1 to 9, and is characterized by comprising the following specific steps:
s1, explosion occurs at the cable connecting position, and the explosion impact force pushes the inner shell 21 to be separated from the clamping connection of the cable;
s2, the inner shell 21 pushes the top moving plate 22 to approach towards the air bag 23 on the inner wall of the outer shell 1 and extrudes the air bag 23, and air in the air bag 23 flows into the ventilation groove;
s3, the ventilation groove conveys the inflow air to the pushing assembly 25, the pushing assembly 25 is activated, and the pushing assembly 25 drives the plugging block 24 to plug the through hole.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The utility model provides a power cable intermediate head protector, includes shell (1) and protection device (2);
the protection device (2) is characterized by comprising an inner shell (21), a top movable plate (22), an air bag (23), a blocking block (24) and a pushing assembly (25);
the cable fixing device comprises two outer shells (1), wherein the outer shells (1) are of circular arc structures, the two outer shells (1) are covered to form a cavity, two inner shells (21) are symmetrically arranged in the cavity, cables penetrate through the cavity, the inner shells (21) fix the cables, and a first gap is reserved between the inner shells (21) and the outer shells (1);
the top moving plate (22) is arranged in the first gap, and the inner shell (21) can drive the top moving plate (22) to approach the outer shell (1);
the air bag (23) is arranged on the inner wall of the shell (1) at one side of the top movable plate (22), air is stored in the air bag (23), a ventilation groove is formed in the side wall of the shell (1), and the air bag (23) is communicated with the ventilation groove;
through holes are formed in two ends of the shell (1), and the plugging blocks (24) are arranged on the wall of each through hole;
the pushing component (25) is arranged above the plugging block (24), the pushing component (25) is communicated with the ventilation groove, and the pushing component (25) can push the plugging block (24) to squeeze the cable passing through the through hole;
the protection device (2) also comprises a pressure relief valve (27); the pressure release valve (27) is fixedly arranged on the side wall of the shell (1), and the pressure release valve (27) is used for discharging redundant air in the shell (1).
2. A power cable intermediate joint protection device according to claim 1, characterized in that the pushing assembly (25) comprises a pushing block (251), a pushing claw (252) and a bump (253);
a pushing groove is formed in the side wall of one end of the shell (1), the pushing groove is communicated with the ventilation groove, and the pushing block (251) can be arranged in the pushing groove in a sliding manner;
one end of the pushing claw (252) is hinged to the lower part of the pushing block (251);
the protruding block (253) is fixedly arranged on the side wall of the plugging block (24), and one end, away from the pushing block (251), of the pushing claw (252) is abutted with the protruding block (253).
3. A power cable intermediate joint protection device according to claim 1, characterized in that the protection device (2) further comprises a jacking rod (221), a sliding sleeve (222) and a spring (223);
the top movable rod (221) is fixedly arranged on one side of the top movable plate (22) close to the inner shell (21);
the sliding sleeve (222) is fixedly arranged on one side, close to the top moving plate (22), of the inner shell (21) along the axis of the top moving rod (221), and the top moving rod (221) is in sliding fit with the sliding sleeve (222);
a second gap is reserved between the jacking rod (221) and the bottom of the sliding sleeve (222), and the spring (223) is arranged in the second gap.
4. A power cable intermediate joint protection device according to claim 1, characterized in that the protection device (2) further comprises a deflection assembly (26), the deflection assembly (26) comprising an explosion-proof plate (261);
the explosion-proof board (261) is the arc structure, and the one end of explosion-proof board (261) sets up on the inner wall of shell (1), and explosion-proof board (261) set up along vertical direction, and the junction of explosion-proof board (261) with two shell (1) lateral parts shelters from.
5. The power cable intermediate joint protection device of claim 4, wherein the deflection assembly (26) further comprises a clamping assembly (262), the clamping assembly (262) comprising a clamping block (2621) and a clamping groove;
the clamping groove is formed in the side wall of the explosion-proof plate (261) along the extending direction of the cable;
the clamping block (2621) is fixedly arranged on the inner wall of the shell (1), and the clamping block (2621) is in clamping fit with the clamping groove.
6. A power cable intermediate joint protection device according to claim 1, characterized in that the protection device (2) further comprises a one-way valve (231);
the one-way valve (231) is arranged in the ventilation groove.
7. A power cable intermediate joint protection device according to claim 6, characterized in that the protection device (2) further comprises a hooking jaw (225);
the upper part of the top movable plate (22) is provided with a hooking groove in a penetrating way, the hooking claw (225) is vertically and fixedly arranged on the inner wall of the shell (1), the lower part of the hooking claw (225) is matched with the hooking groove in a clamping way, and the hooking claw (225) is made of elastic plastic materials.
8. A power cable intermediate joint protection device according to claim 1, characterized in that the protection device (2) further comprises a guide bar (224);
the guide rod (224) is vertically and fixedly arranged on the inner wall of the outer shell (1), and the guide rod (224) respectively penetrates through the top movable plate (22) and the inner shell (21).
9. A method for protecting an intermediate joint of a power cable, which adopts the protecting device for the intermediate joint of the power cable according to any one of claims 1 to 8, and is characterized by comprising the following specific steps:
s1, explosion occurs at the cable connecting position, and the explosion impact force pushes the inner shell (21) to be separated from the clamping connection of the cable;
s2, the inner shell (21) pushes the top moving plate (22) to approach towards the air bag (23) on the inner wall of the outer shell (1), the air bag (23) is extruded, and air in the air bag (23) flows into the ventilation groove;
s3, the ventilation groove conveys the inflow air to the pushing assembly (25), the pushing assembly (25) is activated, and the pushing assembly (25) drives the plugging block (24) to plug the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310125333.6A CN116191339B (en) | 2023-02-16 | 2023-02-16 | Protective device and protective method for intermediate connector of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310125333.6A CN116191339B (en) | 2023-02-16 | 2023-02-16 | Protective device and protective method for intermediate connector of power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116191339A CN116191339A (en) | 2023-05-30 |
| CN116191339B true CN116191339B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310125333.6A Active CN116191339B (en) | 2023-02-16 | 2023-02-16 | Protective device and protective method for intermediate connector of power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116191339B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106109A (en) * | 1988-10-12 | 1990-04-18 | Tokyo Tsushin Kozai Kk | Method of repairing joint cable |
| CN103311872A (en) * | 2013-06-28 | 2013-09-18 | 3M中国有限公司 | Air bag type protection box for cable joint |
| CN212627111U (en) * | 2020-08-13 | 2021-02-26 | 河南豫港电力工程有限公司 | Cable joint protection device |
| CN214754711U (en) * | 2021-01-12 | 2021-11-16 | 靖江市靖开电力电器有限公司 | Cable sealing device for high-voltage power distribution cabinet |
-
2023
- 2023-02-16 CN CN202310125333.6A patent/CN116191339B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106109A (en) * | 1988-10-12 | 1990-04-18 | Tokyo Tsushin Kozai Kk | Method of repairing joint cable |
| CN103311872A (en) * | 2013-06-28 | 2013-09-18 | 3M中国有限公司 | Air bag type protection box for cable joint |
| CN212627111U (en) * | 2020-08-13 | 2021-02-26 | 河南豫港电力工程有限公司 | Cable joint protection device |
| CN214754711U (en) * | 2021-01-12 | 2021-11-16 | 靖江市靖开电力电器有限公司 | Cable sealing device for high-voltage power distribution cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116191339A (en) | 2023-05-30 |
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Effective date of registration: 20231110 Address after: 518000 Shangyou Mansion 305-306, Shangyou Village, Yousong Community, Longhua Street, Longhua District, Shenzhen City, Guangdong Province Applicant after: Shenzhen mingxincheng Lighting Technology Co.,Ltd. Address before: No. 58 Yandong Second Road, Huairou District, Beijing, 101407 Applicant before: Liu Xiaoshi |
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