CN216699474U - A type epoxy waterproof seal cover pours for power cable intermediate head - Google Patents
A type epoxy waterproof seal cover pours for power cable intermediate head Download PDFInfo
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- CN216699474U CN216699474U CN202122722395.4U CN202122722395U CN216699474U CN 216699474 U CN216699474 U CN 216699474U CN 202122722395 U CN202122722395 U CN 202122722395U CN 216699474 U CN216699474 U CN 216699474U
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Abstract
The utility model provides a pour type epoxy waterproof seal cover for power cable intermediate head, belongs to electrician's trade technical field, including waterproof sealing adhesive tape, sealing tape layer, three-dimensional net, elasticity epoxy and armor tape layer. According to the utility model, waterproof sealing rubber strips are lapped and wrapped on the cable outer sheaths butted at two sides, so that external moisture can be prevented from permeating into joint parts along the outer surface of the cable sheath layer, and elastic epoxy resin can be prevented from leaking outside the joint parts from the outer surface of the cable sheath layer before curing. The sealing tape layer prevents moisture and elastomeric epoxy from penetrating radially inward of the cable joint area prior to curing. The three-dimensional mesh, the elastic epoxy resin and the armor tape layer provide mechanical protection for the whole joint part. The utility model has simple structure and low manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of the electrical industry, and particularly relates to a pouring type epoxy resin waterproof sealing sleeve for a power cable intermediate joint.
Background
In recent years, power cables have the characteristics of small occupied space, attractive appearance after being laid and the like, and along with the continuous expansion of the scale of urban infrastructure, the application of the power cables is more and more extensive, and the demand is increased year by year.
In most cases, each power cable line is very long, but because of the restriction of conditions such as transportation and line operation requirements, each power cable line is basically formed by connecting a plurality of sections of cables end to end instead of a complete cable, and the cable is basically laid in a tunnel, a cable trench or directly buried in soil, under the three laying environments, the cable is mostly immersed in water, therefore, the waterproof sealing work of the connecting part of the cable and the cable, namely the middle joint part, needs to be done, if the waterproof sealing measure at the position is not proper, the waterproof sealing effect does not meet the design requirement, moisture and humidity in the environment can invade the cable or the intermediate joint, thereby reducing the service life of the intermediate joint, or the cable is short-circuited at the joint part, and even the explosion accident of the joint is caused.
The sealing of the middle joint part of the power cable mainly considers that a waterproof sealing layer is formed between the outer sheaths of two connected cables, and the waterproof sealing layer has good waterproof and moistureproof performances and is reliably bonded and sealed with the outer sheath layers of the cables at two sides. At present, there are mainly two waterproof sealing methods, the first method: and sealing by using a heat shrinkable tube with two ends coated with hot melt adhesive. The method comprises the steps that a heat shrinkable tube coated with hot melt adhesive at two ends is sleeved in the middle joint part, the heat shrinkable tube retracts after being heated and is tightly wrapped on the surface of a cable outer sheath, and meanwhile, the hot melt adhesive is melted to enable the heat shrinkable tube and the cable outer sheath to be bonded into a whole, so that the waterproof sealing of the middle joint part of the power cable is realized; or the performance of the hot melt adhesive is not up to standard, and after the operation for several years, the water permeates into the middle joint of the cable due to the aging of the hot melt adhesive. The second method comprises the following steps: the method comprises the steps of firstly, carrying out half lap joint on the middle joint part of a power cable to wrap two layers of composite insulating waterproof adhesive tapes to play a sealing role, and then, carrying out wrapping on the surfaces of the wrapped composite insulating waterproof adhesive tapes to wrap two layers of armor tapes to play a protection role.
Therefore, there is a need in the art for a new solution to solve this problem.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the pouring type epoxy resin waterproof sealing sleeve for the power cable intermediate joint is used for solving the technical problem that the sealing function of the existing power cable intermediate joint sealing structure is poor.
A pouring type epoxy resin waterproof sealing sleeve for a power cable intermediate joint comprises waterproof sealing adhesive strips, a sealing tape layer, a three-dimensional net, elastic epoxy resin and an armor tape layer, wherein the waterproof sealing adhesive strips are respectively wrapped on outer jackets of cables on two sides; the sealing tape layer is positioned between the two waterproof sealing adhesive tapes and is wrapped outside the joint parts of the cables on the two sides; the three-dimensional net is wrapped outside the sealing belt layer, two ends of the three-dimensional net are respectively contacted with the inner side edge of the waterproof sealing rubber strip, and elastic epoxy resin is filled in pores of the three-dimensional net; the armor belt layer is wrapped outside the three-dimensional net and the waterproof sealing rubber strip.
And glue injection nozzles are uniformly and fixedly arranged on the upper part of the three-dimensional net.
The three-dimensional net is a carbon fiber three-dimensional net.
The armor tape layer comprises two layers of transparent sealing tape and one layer of transparent armor tape.
The armor belt layer is provided with an exhaust hole.
Through the design scheme, the utility model can bring the following beneficial effects:
1. waterproof sealing rubber strips are lapped and wrapped on the cable outer sheaths butted at two sides, so that external moisture can be prevented from permeating into joint parts along the outer surface of the cable sheath layer, and elastic epoxy resin can be prevented from leaking outside the joint parts on the outer surface of the cable sheath layer before curing.
2. A sealing tape layer is wound between the two waterproof sealing rubber strips to prevent moisture and elastic epoxy resin from radially permeating towards the interior of the cable joint part before curing;
3. the carbon fiber three-dimensional net is wrapped on the outer surface of the sealing belt layer, the strength is high, elastic epoxy resin is filled in the holes in the three-dimensional net, the carbon fiber three-dimensional net enhances the mechanical strength of the epoxy resin, a mechanical protection barrier for the cable joint part is formed, and the middle joint part can be effectively prevented from being damaged by external force;
4. the elastic epoxy resin has certain hardness and elasticity, has very good adhesion with a cable sheath material, can be tightly adhered with the cable sheath into a whole after being cured, has excellent waterproof and sealing performance, prevents moisture from penetrating into a cable joint part along the outer surface of the cable sheath, and can protect the joint part from being physically damaged by external force to the maximum extent;
5. and a transparent armor tape layer is wound on the outer surface of the three-dimensional net to provide mechanical protection for the whole joint part.
6. The utility model has simple structure and low manufacturing cost.
Drawings
The utility model is further described with reference to the following figures and detailed description:
fig. 1 is a schematic structural diagram of a pouring type epoxy resin waterproof sealing sleeve for a power cable intermediate joint according to the present invention.
Fig. 2 is a schematic view of a manufacturing process of the pouring type epoxy resin waterproof sealing sleeve for the power cable intermediate joint of the present invention.
In the figure, 1-waterproof sealing adhesive tape, 2-sealing belt layer, 3-three-dimensional net, 4-elastic epoxy resin, 5-armor belt layer, 6-cable, 7-glue injection nozzle, 8-vent hole, 9-glue injection bag and 10-rolling clamp.
Detailed Description
As shown in the figure, the pouring type epoxy resin waterproof sealing sleeve for the power cable intermediate joint comprises a waterproof sealing rubber strip 1, a sealing belt layer 2, a three-dimensional net 3, elastic epoxy resin 4 and an armor belt layer 5, wherein the waterproof sealing rubber strip 1 is respectively wrapped on outer sheaths of cables 6 at two sides; the sealing tape layer 2 is positioned between the two waterproof sealing adhesive tapes 1 and is wrapped outside the joint parts of the cables on the two sides; the three-dimensional net 3 is wrapped outside the sealing belt layer 2, two ends of the three-dimensional net 3 are respectively contacted with the inner side edge of the waterproof sealing rubber strip 1, and elastic epoxy resin 4 is poured into the pores of the three-dimensional net 3; the armor belt layer 5 wraps the three-dimensional net 3 and the waterproof sealing rubber strip 1.
And glue injection nozzles 7 are uniformly and fixedly arranged on the upper part of the three-dimensional net 3.
The three-dimensional net 3 is a carbon fiber three-dimensional net.
The armor tape layer 5 comprises two layers of transparent sealing tape and one layer of transparent armor tape.
The armor belt layer 5 is provided with an exhaust hole 8.
A casting epoxy resin waterproof sealing sleeve for a power cable intermediate joint is manufactured on site after the intermediate joint of a power cable and components thereof are assembled, and mainly comprises the following steps:
1) cleaning the outer surfaces of the two power cables 6 within 100mm from the port of the outer sheath respectively, polishing the outer surfaces with abrasive paper of more than 240# specification, cleaning the outer surfaces with alcohol, and then drying the outer surfaces with hot air;
2) the 10mm position of the outer sheath of each section of the power cable 6 is respectively lapped and wrapped with two layers of black sealing tapes,forming a sealing tape layer 2, the sealing tape layer 2 having a length L2Preventing radial penetration of the liquid epoxy, as shown at S1 in fig. 2;
3) wrapping two layers of red waterproof sealing rubber strips 1 with the width of about 10mm around the position 60mm away from the port of the outer sheath of each section of the power cable 6 respectively, wherein the length of each waterproof sealing rubber strip 1 is L1Preventing the liquid epoxy resin from leaking axially along the outer jacket surface of the power cable 6 to both sides, as shown at S2 in fig. 2;
4) two layers of three-dimensional nets 3 are lapped and wrapped between the inner edges of the two wrapping red waterproof sealing adhesive tapes 1 in a half lap joint mode, the thickness of the wrapped three-dimensional nets is about 4-5 mm, and the three-dimensional nets 3 cannot wrap the surfaces of the red waterproof sealing adhesive tapes 1, as shown in S3 in figure 2;
5) measuring and taking total length L of wrapped three-dimensional net 33Then, respectively installing a glue injection nozzle 7 at the highest positions one third and two thirds away from the end part of one side of the three-dimensional net 3, wherein one glue injection nozzle 7 is approximately positioned at the highest position of the center of the middle joint, as shown in S4 in fig. 2;
6) covering red waterproof sealing rubber strips 1 wrapped at two sides respectively, wrapping two layers of transparent sealing tapes on the surface of a three-dimensional net 3 between two sections of power cables 6 in a half lap joint mode, wrapping one layer of transparent armor tape outside the transparent sealing tapes in a half lap joint mode to form an armor tape layer 5, wherein the length of the armor tape layer 5 is L4Respectively cutting a 3 x 3mm exhaust hole at the highest point position of the transparent armor belt corresponding to the two side edges of the three-dimensional net, as shown by S5 in figure 2;
7) inserting the glue injection port of the special glue injection bag 9 into the glue injection nozzle 7 at the highest position and rotationally fixing the glue injection port, then pouring the liquid epoxy resin mixed with the curing agent into the special glue injection bag 9, clamping the upper part of the special glue injection bag 9 by using the rolling clamp 10, slowly rotating the rolling clamp 10 downwards, extruding the liquid epoxy resin in the special glue injection bag 9 into the three-dimensional net 3, and stopping rotating the rolling clamp 10 when the epoxy resin flows to the other glue injection nozzle 7 part, as shown in S6 in figure 2;
8) the glue injection bag 9 is taken down and then is installed and fixed on the other glue injection nozzle 7, and liquid epoxy resin is injected by the same method until the liquid epoxy resin overflows from the vent holes 8 at two sides 3 x 3, as shown in S7 in figure 2;
9) carefully checking whether bubbles are mixed in the liquid epoxy resin poured into the three-dimensional net 3, if so, cutting a transparent armor tape and a transparent sealing tape at the corresponding bubble position to remove the bubbles, and then sealing the cut and the exhaust holes 8 at two sides 3 x 3 by using the transparent sealing tape, as shown in S8 in figure 2;
10) under the environment of 23-25 ℃, the liquid epoxy resin needs about 90min if completely cured, and when the environment temperature is lower than the temperature, the curing time is properly prolonged or shortened, so that the optimal curing effect is achieved, and the elastic epoxy resin 4 is formed.
Claims (5)
1. The utility model provides a pour type epoxy waterproof seal cover for power cable intermediate head, characterized by: the waterproof cable comprises a waterproof sealing rubber strip (1), a sealing belt layer (2), a three-dimensional net (3), elastic epoxy resin (4) and an armor belt layer (5), wherein the waterproof sealing rubber strip (1) is respectively wrapped on outer jackets of cables (6) at two sides; the sealing tape layer (2) is positioned between the two waterproof sealing adhesive tapes (1) and wraps the outer parts of the joint parts of the cables on two sides; the three-dimensional net (3) is wrapped outside the sealing belt layer (2), two ends of the three-dimensional net (3) are respectively contacted with the inner side edge of the waterproof sealing adhesive tape (1), and elastic epoxy resin (4) is poured into pores of the three-dimensional net (3); the armor belt layer (5) is wrapped outside the three-dimensional net (3) and the waterproof sealing adhesive tape (1).
2. The casting type epoxy resin waterproof sealing sleeve for the intermediate joint of the power cable as claimed in claim 1, wherein the casting type epoxy resin waterproof sealing sleeve is characterized in that: and glue injection nozzles (7) are uniformly and fixedly arranged on the upper part of the three-dimensional net (3).
3. A casting type epoxy resin waterproof sealing sleeve for an intermediate joint of a power cable according to claim 1 or 2, characterized in that: the three-dimensional net (3) is a carbon fiber three-dimensional net.
4. The pouring type epoxy resin waterproof sealing sleeve for the intermediate joint of the power cable as claimed in claim 1, which is characterized in that: the armor tape layer (5) comprises two layers of transparent sealing tapes and one layer of transparent armor tape.
5. A casting type epoxy resin waterproof sealing sleeve for an intermediate joint of a power cable according to claim 1 or 4, characterized in that: the armor belt layer (5) is provided with an exhaust hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122722395.4U CN216699474U (en) | 2021-11-09 | 2021-11-09 | A type epoxy waterproof seal cover pours for power cable intermediate head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122722395.4U CN216699474U (en) | 2021-11-09 | 2021-11-09 | A type epoxy waterproof seal cover pours for power cable intermediate head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216699474U true CN216699474U (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122722395.4U Active CN216699474U (en) | 2021-11-09 | 2021-11-09 | A type epoxy waterproof seal cover pours for power cable intermediate head |
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| Country | Link |
|---|---|
| CN (1) | CN216699474U (en) |
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2021
- 2021-11-09 CN CN202122722395.4U patent/CN216699474U/en active Active
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