CN214674297U - High-pressure waterproof explosion-proof intermediate head for electric power system - Google Patents
High-pressure waterproof explosion-proof intermediate head for electric power system Download PDFInfo
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- CN214674297U CN214674297U CN202121016319.5U CN202121016319U CN214674297U CN 214674297 U CN214674297 U CN 214674297U CN 202121016319 U CN202121016319 U CN 202121016319U CN 214674297 U CN214674297 U CN 214674297U
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Abstract
The utility model relates to a high pressure waterproof explosion-proof intermediate head for electric power system. Cable joint includes conductor connecting pipe, inside shield metal sleeve, temperature sensor, rubber body, the waterproof filling layer of first insulating, the sensor is put in office, the fire-retardant waterproof mixture layer of first, copper shell, the waterproof filling layer of second insulating, explosion-proof shell that set gradually from inside to outside. The utility model discloses have the function that temperature measurement, survey the office often put, can detect the operational aspect of product often, acquire information to the abnormal conditions very first time to rapid response compromises waterproof and explosion-proof function simultaneously, can solve because of the proruption trouble explodes the destruction to cable run, power facility and personnel production on every side, thereby the normal operating of product is guaranteed to the full aspect.
Description
Technical Field
The utility model relates to a waterproof explosion-proof intermediate head of high pressure for electric power system belongs to the technical field that high tension cable connects.
Background
In recent years, with the rapid development of power grid construction in China, the demand of high-voltage power cables is rapidly increased, the quantity of the demand of high-voltage cable connectors is continuously increased, the high-voltage cable connectors are influenced by human factors, construction, operation environments and other factors, many combustion and explosion accidents occur at home and abroad every year, and the generated destructive power can not only cause power failure and outage of the line, but also cause serious damage to cable lines, power facilities and personnel operating at the periphery, even cause more serious secondary accidents, and the loss caused by the accidents cannot be estimated.
At present, cable connectors in the market are made of glass fiber reinforced plastic, AB waterproof glue is filled in the cable connectors, and the AB waterproof glue and the cable connectors are bonded into a whole;
chinese patent publication No. CN209150699U discloses a high-pressure waterproof flame-retardant intermediate joint for an electric power system, which includes a conductor connecting pipe, an internal shielding metal sleeve, a rubber body, an insulating waterproof filling layer, a flame-retardant waterproof mixture and a copper shell; the utility model discloses when guaranteeing in the aspect of waterproof nature, leakproofness, still have very high fire resistance, can reduce the hidden danger that cable system's conflagration brought. The product of the patent has certain waterproof and flame retardant functions, but does not have an explosion-proof function.
Disclosure of Invention
The utility model provides a to prior art not enough, the utility model provides a waterproof explosion-proof intermediate head of high pressure for electric power system.
The utility model adopts the following technical scheme:
a high-pressure waterproof explosion-proof intermediate joint for an electric power system comprises a conductor connecting pipe, an internal shielding metal sleeve, a rubber body, a first insulating waterproof filling layer, a first flame-retardant waterproof mixture layer, a copper shell, a second insulating waterproof filling layer and an explosion-proof shell which are sequentially arranged from inside to outside;
both ends of the explosion-proof shell are provided with pressure relief ports, and the end parts of the pressure relief ports are detachably provided with pressure relief covers; the end part of the explosion-proof shell is provided with a cable end part sealing hardware fitting and a grounding wire end part sealing hardware fitting, and a second flame-retardant waterproof mixture layer is filled between the cable end part sealing hardware fitting and the cable; a second flame-retardant waterproof mixture layer is filled between the grounding wire end sealing hardware fitting and the grounding wire; the middle of the conductor connecting pipe is of a solid structure, and the two ends of the conductor connecting pipe are of tubular structures; the conductor connecting pipe is connected with the conductors of the two sections of cables through compression joint. The tubular structures at the two ends are responsible for being connected with the cable, and the solid structure in the middle provides a conductive section corresponding to the section of the cable, so that the current in the cable can smoothly pass through the joint without damage; the conductor of cable is inserted to the both sides of conductor connecting pipe, has guaranteed the compactness of conductor and conductor connecting pipe contact through the mode of crimping, compares with the welding, and the contact resistance of crimping is little, avoids appearing the phenomenon of generating heat in the use, simultaneously to the cable not damaged.
And no filler is arranged between the explosion-proof shell and the second insulating waterproof filling layer, and when explosion occurs, high pressure quickly passes through the cavity and is released through the pressure relief opening. Because the pressure relief cover is of a detachable structure, after explosion occurs, the explosion-proof shell can be reused after the explosion-proof cover is replaced, the use cost is reduced, the maintenance efficiency is improved, and the cost resource is saved.
Preferably, the cable end sealing hardware fitting and the grounding wire end sealing hardware fitting are provided with a third insulating waterproof filling layer at the end parts.
Preferably, the conductor connecting pipe is sleeved with the shielding metal sleeve; the first insulating waterproof filling layer is arranged on the outer side and the end part of the rubber body; the first flame-retardant waterproof mixture layer is filled between the copper shell and the first insulating waterproof filling layer, and the second insulating waterproof filling layer is distributed on the outer wall of the copper shell; and the explosion-proof shell is sleeved outside the second insulating waterproof filling layer.
Preferably, the outer wall of the inner shielding metal sleeve is provided with a temperature sensor; a partial discharge sensor is arranged outside the first insulating waterproof filling layer; the temperature sensor surrounds the outer wall of the inner shielding metal sleeve for a circle; the partial discharge sensor surrounds the first insulating waterproof filling layer for a circle. The temperature sensor is used for detecting the temperature condition of the conductor in real time; the partial discharge sensor is used for detecting the partial discharge condition of a product in real time. The encircling arrangement improves the accuracy of the measurement.
Preferably, the thickness of the pressure relief cover is 0.3-0.8 mm, and the thickness of the explosion-proof shell is 10-20 mm; the diameter of the explosion-proof shell is 350 mm-450 mm.
Preferably, the cable end sealing hardware fitting and the grounding wire end sealing hardware fitting are respectively provided with a flame-retardant waterproof mixture filling port, and a port cover is arranged at a port of the flame-retardant waterproof mixture filling port.
The conductor of cable is inserted to the both sides of conductor connecting pipe, has guaranteed the compactness of conductor and conductor connecting pipe contact through the mode of crimping, compares with the welding, and the contact resistance of crimping is little, avoids appearing the phenomenon of generating heat in the use, simultaneously to the cable not damaged.
Preferably, the ports at the two ends of the copper shell are contraction ports, and the contraction ports are sealed by waterproof cement and a second insulating waterproof filling layer.
The utility model has the advantages that:
the high-voltage waterproof and explosion-proof intermediate joint for the power system has the functions of measuring temperature and measuring partial discharge constantly, and simultaneously has the waterproof and explosion-proof functions, thereby not only reducing the occurrence of joint explosion accidents, but also avoiding the potential safety hazard of the cable intermediate joint in the use process; the utility model discloses the cost of manufacture is low, and construction process is simple, is suitable for extensive popularization.
Drawings
Fig. 1 is a schematic structural view of a high-pressure waterproof explosion-proof intermediate joint for an electric power system according to the present invention;
FIG. 2 is an enlarged fragmentary view of a middle portion of FIG. 1;
wherein: 1. conductor connecting pipe, 2, inside shield metal sleeve, 3, temperature sensor, 4, rubber body, 5, first insulating waterproof filling layer, 6, the sensor is put in the office, 7, first fire-retardant waterproof mixture, 8, the copper shell, 9, the second insulating waterproof filling layer, 10, explosion-proof shell, 11, pressure release mouth, 12, the sealed gold utensil of cable tip, 13, the sealed gold utensil of earth connection terminal portion, 14, the fire-retardant waterproof mixture of second, 15, the third insulating waterproof filling layer.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, but not limited thereto, and the present invention is not described in detail, and is in accordance with the conventional techniques in the art.
In the following embodiments, the material of the conductor connecting tube 1 is copper, copper alloy, aluminum or aluminum alloy; the material of the internal shielding metal sleeve 2 is copper, copper alloy, aluminum or aluminum alloy; the rubber body 4 is made of ethylene propylene diene monomer or silicone rubber. The insulating waterproof filling layer is one or more of an adhesive tape and a heat shrinkable tube with insulating and waterproof properties. The flame-retardant waterproof mixture layer is a bi-component polyurethane coating. The double-component polyurethane coating is generally composed of isocyanate prepolymer (also called low molecular urethane polymer) and hydroxyl-containing resin, can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties according to the difference of the hydroxyl-containing components, and organic flame retardant (one or more of phosphorus, halogen and nitrogen) and inorganic flame retardant (one or more of antimonide, boride, aluminum hydroxide and magnesium hydroxide) and high molecular flame retardant are filled in the double-component polyurethane coating, so that the double-component polyurethane coating has the performances of water resistance, flame retardance, corrosion resistance and high temperature resistance, has the oxygen index of not less than 30 percent and plays the roles of water resistance and flame retardance.
The copper shell 8 is made of one of bronze, red copper or brass; the explosion-proof shell 10 is made of one of aluminum magnesium alloy, stainless steel or high-strength PE material. The material of the cable end sealing hardware fitting 12 is one of aluminum magnesium alloy, stainless steel or high-strength PE material; the material of the grounding wire end sealing hardware 13 is one of aluminum magnesium alloy, stainless steel or high-strength PE material; the pressure relief port 11 is made of one of aluminum magnesium alloy, stainless steel or high-strength PE material.
Example 1
As shown in fig. 1 and 2.
A high-pressure waterproof explosion-proof intermediate joint for an electric power system comprises a conductor connecting pipe 1, an internal shielding metal sleeve 2, a rubber body 4, a first insulating waterproof filling layer 5, a first flame-retardant waterproof mixture layer 7, a copper shell 8, a second insulating waterproof filling layer 9 and an explosion-proof shell 10 which are sequentially arranged from inside to outside;
two ends of the explosion-proof shell 10 are provided with pressure relief ports 11, and the end parts of the pressure relief ports are detachably provided with pressure relief covers; the end part of the explosion-proof shell 10 is provided with a cable end part sealing hardware 12 and a grounding wire end part sealing hardware 13, and a second flame-retardant waterproof mixture layer 14 is filled between the cable end part sealing hardware 12 and the cable; a second flame-retardant waterproof mixture layer 14 is filled between the grounding wire end sealing hardware 13 and the grounding wire; the middle of the conductor connecting pipe 1 is of a solid structure, and two ends of the conductor connecting pipe are of tubular structures; the conductor connecting pipe 1 connects the conductors of the two sections of cables by crimping. The tubular structures at the two ends are responsible for being connected with the cable, and the solid structure in the middle provides a conductive section corresponding to the section of the cable, so that the current in the cable can smoothly pass through the joint without damage; the conductor of cable is inserted to the both sides of conductor connecting pipe 1, has guaranteed the compactness of conductor and 1 conductor connecting pipe contact through the mode of crimping, compares with the welding, and the contact resistance of crimping is little, avoids appearing the phenomenon of generating heat in the use, simultaneously to the cable not damaged.
And no filler is filled between the explosion-proof shell 10 and the second insulating waterproof filling layer 9, and when explosion occurs, high pressure quickly passes through the cavity and is released through the pressure relief port 11. Because the pressure relief cover is of a detachable structure, after explosion happens, the explosion-proof shell 10 can be reused after the explosion-proof cover is replaced, the use cost is reduced, the maintenance efficiency is improved, and the cost resource is saved. The inner shielding metal sleeve 2 can reduce the contact resistance of the conductor connection and homogenize the field intensity distribution at the conductor connection. The rubber body 4 functions as a uniform electric field. The insulating waterproof filling layer plays a role in insulation and water resistance. The explosion-proof shell 10 plays a role in water resistance and explosion resistance.
Example 2
The high-voltage waterproof and explosion-proof intermediate joint for the power system according to embodiment 1, further, the ends of the cable end sealing hardware 12 and the ground wire end sealing hardware 13 are provided with a third insulating and waterproof filling layer 15.
The application method of the high-pressure waterproof explosion-proof intermediate joint for the power system comprises the following steps:
firstly, processing the end parts of cables on two sides to expose cable conductors with specified sizes, then inserting the cable conductors on two sides into a conductor connecting pipe 1 for pressure connection, sleeving an inner shielding metal sleeve 2 on the outer side of the conductor connecting pipe 1, sleeving a rubber body 4 on the outer side of the inner shielding metal sleeve 2, and winding a first insulating waterproof filling layer 5 on the outer side and the end parts of the rubber body 4; after the copper shell 8 is sleeved outside the first insulating waterproof filling layer 5, a first flame-retardant waterproof mixture layer 7 is poured between a cavity defined by the first insulating waterproof filling layer 5 and the copper shell 8, a second insulating waterproof filling layer 9 is wound on the outer side and the end part of the copper shell 8, and an explosion-proof shell 10 is sleeved outside the second insulating waterproof filling layer 9; the end part of the explosion-proof shell 10 is connected with a cable end part sealing hardware 12 and a grounding wire end part sealing hardware 13, a second flame-retardant waterproof mixture 14 is injected into the cable end part sealing hardware 12 and the grounding wire end part sealing hardware 13, and the end parts of the cable end part sealing hardware 12 and the grounding wire end part sealing hardware 13 are wound with a third insulating waterproof filling layer 15.
Example 3
The high-voltage waterproof and explosion-proof intermediate joint for the power system in embodiment 1 is further characterized in that the conductor connecting pipe 1 is sleeved with the shielding metal sleeve 2; the first insulating waterproof filling layer 5 is arranged on the outer side and the end part of the rubber body 4; the first flame-retardant waterproof mixture layer 7 is filled between the copper shell 8 and the first insulating waterproof filling layer 5, and the second insulating waterproof filling layer 9 is distributed on the outer wall of the copper shell 8; the explosion-proof shell 10 is sleeved on the outer side of the second insulating waterproof filling layer 9.
Example 4
The high-voltage waterproof and explosion-proof intermediate joint for the power system according to embodiment 1, further, a temperature sensor 3 is disposed on an outer wall of the inner shielding metal sleeve 2; a partial discharge sensor 6 is arranged on the outer side of the first insulating waterproof filling layer 5; the temperature sensor 3 surrounds the outer wall of the inner shielding metal sleeve 2 for a circle; the partial discharge sensor 6 surrounds the first insulating waterproof filling layer 5 for a circle. The temperature sensor 3 is used for detecting the temperature condition of the conductor in real time; the partial discharge sensor 6 is used for detecting the partial discharge condition of the product in real time. The encircling arrangement improves the accuracy of the measurement.
Example 5
The high-pressure waterproof and explosion-proof intermediate joint for the power system, as described in embodiment 1, further, the thickness of the pressure relief cover is 0.5mm, and the thickness of the explosion-proof housing is 15 mm; the diameter of the explosion-proof shell is 400 mm.
Example 6
The high-pressure waterproof and explosion-proof intermediate joint for the power system according to embodiment 1, further, the cable end sealing hardware 12 and the grounding wire end sealing hardware 13 are respectively provided with a flame-retardant waterproof mixture filling port, and a port cover is provided at a port of the flame-retardant waterproof mixture filling port.
Example 7
The high-voltage waterproof and explosion-proof intermediate joint for the power system in embodiment 1 is further characterized in that the ports at the two ends of the copper shell 8 are contraction openings, and the contraction openings are sealed by waterproof mastic and a second insulating waterproof filling layer 9.
Claims (7)
1. A high-pressure waterproof and explosion-proof intermediate joint for an electric power system is characterized by comprising a conductor connecting pipe, an internal shielding metal sleeve, a rubber body, a first insulating waterproof filling layer, a first flame-retardant waterproof mixture layer, a copper shell, a second insulating waterproof filling layer and an explosion-proof shell which are sequentially arranged from inside to outside; both ends of the explosion-proof shell are provided with pressure relief ports, and the end parts of the pressure relief ports are detachably provided with pressure relief covers; the end part of the explosion-proof shell is provided with a cable end part sealing hardware fitting and a grounding wire end part sealing hardware fitting, and a second flame-retardant waterproof mixture layer is filled between the cable end part sealing hardware fitting and the cable; a second flame-retardant waterproof mixture layer is filled between the grounding wire end sealing hardware fitting and the grounding wire; the middle of the conductor connecting pipe is of a solid structure, and the two ends of the conductor connecting pipe are of tubular structures; the conductor connecting pipe is connected with the conductors of the two sections of cables through compression joint.
2. The high-voltage waterproof and explosion-proof intermediate joint for the electric power system as claimed in claim 1, wherein the cable end sealing hardware fitting and the grounding wire end sealing hardware fitting are provided with a third insulating and waterproof filling layer at the ends.
3. The high-pressure waterproof and explosion-proof intermediate joint for the power system as claimed in claim 1, wherein the conductor connecting pipe is sleeved with a shielding metal sleeve; the first insulating waterproof filling layer is arranged on the outer side and the end part of the rubber body; the first flame-retardant waterproof mixture layer is filled between the copper shell and the first insulating waterproof filling layer, and the second insulating waterproof filling layer is distributed on the outer wall of the copper shell; and the explosion-proof shell is sleeved outside the second insulating waterproof filling layer.
4. The high-pressure waterproof and explosion-proof intermediate joint for the power system as claimed in claim 1, wherein the outer wall of the inner shielding metal sleeve is provided with a temperature sensor; a partial discharge sensor is arranged outside the first insulating waterproof filling layer; the temperature sensor surrounds the outer wall of the inner shielding metal sleeve for a circle; the partial discharge sensor surrounds the first insulating waterproof filling layer for a circle.
5. The high-pressure waterproof and explosion-proof intermediate joint for the power system as claimed in claim 1, wherein the thickness of the pressure relief cover is 0.3-0.8 mm, and the thickness of the explosion-proof shell is 10-20 mm; the diameter of the explosion-proof shell is 350 mm-450 mm.
6. The high-pressure waterproof and explosion-proof intermediate joint for the electric power system according to claim 1, wherein the cable end sealing hardware fitting and the grounding wire end sealing hardware fitting are respectively provided with a flame-retardant waterproof mixture filling port, and a port cover is arranged at a port of the flame-retardant waterproof mixture filling port.
7. The high-pressure waterproof and explosion-proof intermediate joint for the power system as claimed in claim 1, wherein the ports at the two ends of the copper shell are constrictions, and the constrictions are sealed by waterproof mastic and a second insulating and waterproof filling layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121016319.5U CN214674297U (en) | 2021-05-13 | 2021-05-13 | High-pressure waterproof explosion-proof intermediate head for electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121016319.5U CN214674297U (en) | 2021-05-13 | 2021-05-13 | High-pressure waterproof explosion-proof intermediate head for electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214674297U true CN214674297U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121016319.5U Active CN214674297U (en) | 2021-05-13 | 2021-05-13 | High-pressure waterproof explosion-proof intermediate head for electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214674297U (en) |
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2021
- 2021-05-13 CN CN202121016319.5U patent/CN214674297U/en active Active
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