CN111313167A - A kind of intermediate connection restoration of cable body and application method thereof - Google Patents

Abstract

The invention relates to a middle connection restoration body of a cable body and an application method thereof. The prosthesis comprises a conductor connecting part and a double-layer part. The multi-layer part is sleeved on the conductor connecting part, and the length of the conductor connecting part is smaller than that of the multi-layer part. The novel intermediate connection restoration of the cable body is used, so that the cable can be restored by connecting or welding the copper core of the cable with the first connecting block or the second connecting block of the conductor connecting part in the intermediate connection restoration of the cable body, and the problems of long operation time and complex restoration process in the cable restoration in the prior art are solved. The intermediate connection restoration of the cable body provided by the invention also has the characteristics of simple structure and convenience in use.

Description

A kind of intermediate connection restoration of cable body and application method thereof

technical field

The invention relates to the technical field of cable repair, in particular to an intermediate connection repair body of a cable and cable body and an application method thereof.

Background technique

Cable is the transmission carrier of electric energy from place A to place B. With the acceleration of urban construction and the improvement of overall environmental requirements, cables are used in many new urban areas and residential quarters. The outer skin of cables is mainly moisture-proof and waterproof. cross-linked polyethylene material. If it is used underground for a long time, it will inevitably cause damage caused by external force and overload operation. The traditional method is to cut off the cable at the damaged fault point, and use the traditional cable intermediate accessories to repair and connect the cut parts; however, this kind of connection with traditional accessories There are many safety hazards in the way of getting up, such as the middle accessories of cold-shrinkable cables and the middle accessories of heat-shrinkable cables are installed and powered on, because the cables run underground for a long time, the middle head of the traditional middle accessories will have blisters and moisture infiltration. Power failures often occur due to breakdown. The above reasons are all due to the poor sealing performance of the traditional cable intermediate accessories themselves, which are the reasons for the failure of the above-mentioned various cable intermediate joint accessories. Research and development of cable intermediate connection technology.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an intermediate connection repair body of a cable body and an application method thereof, so as to meet the requirements of long-term normal operation of cables in harsh underground environments without non-human failures, and effectively solve the problems of cable repair in the existing cable connection technology. defects and security risks.

For achieving the above object, the present invention provides the following scheme:

An intermediate connection repair body of a cable body, comprising: a conductor connection part and a cladding part;

The cladding part is sleeved on the conductor connecting part, and the continuous layer is restored from the inside to the outside according to the structure of the cable body, and the material used is the same as the material of the cable body.

Optionally, the conductor connection part includes a first connection block, a second connection block and an intermediate block;

An intermediate block is disposed between the first connection block and the second connection block, and the length of the first connection block and the length of the second connection block are both smaller than the length of the intermediate block.

Optionally, the intermediate block includes a first inner semiconducting recovery layer, a first insulating recovery layer, a first semiconducting layer, a first copper mesh layer, a first insulating layer and a first protective layer;

One surface of the first inner semi-conductive recovery layer is attached to the second connection block; the other surface of the first inner semi-conductive recovery layer is attached to a surface of the first insulating recovery layer; The other surface of the first insulation recovery layer is attached to a surface of the first semiconductive layer; the other surface of the first semiconductive layer is attached to a surface of the first copper mesh layer; the The other surface of the first copper mesh layer is attached to a surface of the first insulating layer; the other surface of the first insulating layer is attached to a surface of the first protective layer; the first The other surface of the protective layer is attached to the first connection block.

Optionally, the cladding portion includes: a second inner semiconducting recovery layer, a second insulating recovery layer, a second semiconducting layer, a second copper mesh layer and a second insulating layer;

The second inner semi-conductive recovery layer is sleeved on the conductor connection part, and the second inner semi-conductive recovery layer is closely attached to the conductor connection part; the second insulation recovery layer is sleeved on the conductor connection part. the second inner semi-conductive recovery layer; the second semi-conductive layer is sleeved on the second insulating recovery layer; the second copper mesh layer is sleeved on the semi-conductive layer; the second The insulating layer is sleeved on the second copper mesh layer.

Optionally, the cladding part further includes: a second protective layer, a first waterproof layer, a third copper mesh layer, a third insulating layer, a heat shrinkable layer, a second waterproof layer, an armor layer and a third protective layer ;

The second protective layer is sleeved on the second insulating layer; the first waterproof layer is sleeved on the second protective layer; the third copper mesh layer is sleeved on the first waterproof layer the third insulating layer is sleeved on the third copper mesh layer; the heat shrinkable layer is sleeved on the third insulating layer; the second waterproof layer is sleeved on the heat shrinkable layer the armoring layer is sleeved on the second waterproof layer; the third protective layer is sleeved on the armoring layer.

Optionally, the material of the first protective layer, the material of the second protective layer or the material of the third protective layer is polyvinyl chloride.

An application method for an intermediate connection restoration of a cable body, comprising:

Get the broken cable model;

The intermediate connection restoration of the cable body is obtained according to the cable model; wherein the diameters of the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body are the same as the copper diameter of the broken cable. The diameters of the cores are equal;

Soldering flux is placed in the conductor connection portion of the intermediate connection restoration of the cable body to weld the copper core of the broken cable.

Another application method of the intermediate connection restoration of the cable body, including

Get the damaged cable model;

The intermediate connection restoration of the cable body is obtained according to the cable model; wherein the diameters of the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body are the same as the copper diameter of the broken cable. The diameters of the cores are equal;

Insert the copper core of the damaged cable into the conductor connection part of the intermediate connection repair body of the cable body, and use conductive glue to connect the copper core of the damaged cable to the first connection block or the first connection block in the conductor connection part. After the two connection blocks are bonded, the damaged cable and the intermediate connection repair body of the cable body are wrapped with polyvinyl chloride.

According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

The intermediate connection repair body of the cable body and the application method thereof provided by the present invention, by preparing the intermediate connection repair body of the cable body with the same structure as the cable, only the middle connection between the copper core of the cable and the cable body only needs to be connected in the process of repairing the cable. The cable can be repaired by connecting or welding the first connection block or the second connection block of the conductor connection part in the repair body, thereby solving the problems of long operation time and complicated repair process in cable repair in the prior art. In addition, the intermediate connection repair body of the cable body provided by the present invention also has the characteristics of simple structure and convenient use.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

1 is a schematic structural diagram of a cross-section of an intermediate connection restoration of a cable body according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a lateral section of an intermediate connection prosthesis of a cable body according to an embodiment of the present invention;

3 is a flowchart of an application method for an intermediate connection restoration of a cable body according to an embodiment of the present invention;

FIG. 4 is a flowchart of another method for applying an intermediate connection restoration of a cable body according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the result of repairing the cable by using the intermediate connection repair body of the cable body provided by the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of 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.

The purpose of the present invention is to provide an intermediate connection repair body of a cable body and an application method thereof, so as to solve the problems of long operation time and complicated repair process existing in cable repair in the prior art.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of a cross-section of an intermediate connection restoration of a cable body provided by an embodiment of the present invention, and FIG. 2 is a schematic structural diagram of a lateral section of the intermediate connection restoration of a cable body provided by an embodiment of the present invention, as shown in FIG. 1 As shown in -2, an intermediate connection restoration of a cable body, comprising: a conductor connection part 1 and a cladding part 2;

The cladding portion 2 is sleeved on the conductor connecting portion 1 , and the length of the conductor connecting portion 1 is smaller than the length of the cladding portion 2 .

The conductor connecting part 1 includes a first connecting block 11, a second connecting block 12 and an intermediate block 13;

An intermediate block 13 is disposed between the first connecting block 11 and the second connecting block 12 , and the length of the first connecting block 11 and the length of the second connecting block 12 are both smaller than the length of the intermediate block 13 . length.

In order to make the overall structure of the intermediate connection repair body of the cable body more similar to the structure of the cable, the intermediate block 13 includes a first inner semi-conductive recovery layer, a first insulation recovery layer, a first semi-conductive layer, and a first copper mesh. layer, a first insulating layer and a first protective layer;

One surface of the first inner semi-conductive recovery layer is attached to the second connection block 12; the other surface of the first inner semi-conductive recovery layer is attached to a surface of the first insulating recovery layer; The other surface of the first insulation recovery layer is attached to a surface of the first semiconductive layer; the other surface of the first semiconductive layer is attached to a surface of the first copper mesh layer; The other surface of the first copper mesh layer is attached to a surface of the first insulating layer; the other surface of the first insulating layer is attached to a surface of the first protective layer; the first The other surface of a protective layer is attached to the first connection block 11 .

As an embodiment of the present invention, the above-mentioned cladding portion 2 may include: a second inner semiconducting recovery layer, a second insulating recovery layer, a second semiconducting layer, a second copper mesh layer, and a second insulating layer;

The second inner semi-conductive recovery layer is sleeved on the conductor connection portion 1, and the second inner semi-conductive recovery layer is closely attached to the conductor connection portion 1; the second insulation recovery layer is sleeved on the second inner semiconducting recovery layer; the second semiconducting layer is sleeved on the second insulating recovery layer; the second copper mesh layer is sleeved on the semiconducting layer; the The second insulating layer is sleeved on the second copper mesh layer.

The above-mentioned cladding portion 2 may also include: a second protective layer, a first waterproof layer, a third copper mesh layer, a third insulating layer, a heat shrinkable layer, a second waterproof layer, an armor layer and a third protective layer;

The second protective layer is sleeved on the second insulating layer; the first waterproof layer is sleeved on the second protective layer; the third copper mesh layer is sleeved on the first waterproof layer the third insulating layer is sleeved on the third copper mesh layer; the heat shrinkable layer is sleeved on the third insulating layer; the second waterproof layer is sleeved on the heat shrinkable layer the armoring layer is sleeved on the second waterproof layer; the third protective layer is sleeved on the armoring layer.

In order to reduce the cost of the intermediate connection restoration of the entire cable body, in the present invention, the material of the first protective layer, the material of the second protective layer or the material of the third protective layer can all be polyvinyl chloride (Polyvinylchloride, PVC).

The specific functions of each layer of the intermediate connection restoration structure of the cable body provided by the present invention are almost the same as the structure in the cable, and the specific introduction is as follows:

Protective layer (black PVC is used in the present invention): when the black PVC is coated on the outermost end of the cable, it mainly plays the role of protection, abrasion resistance and resistance to external force. Black PVC acts as a reinforcement between the waterproof layer and the insulating layer.

Armor layer: equivalent to the galvanized iron sheet of the cable body, the present invention adopts the armor tape to replace the steel armor of the cable, and its effect is basically the same as that of the steel armor of the cable.

Waterproof layer: Its important function is to effectively prevent the outside of the cable from penetrating into the cable structure, which affects the operation of the cable.

Heat-shrinkable layer: The function of the heat-shrinkable layer is to hold the fifth layer of insulating tape tightly after shrinking, and at the same time, it can hold and protect the body from loosening.

Insulation layer: the role of reinforcing the insulation level. Since the cable runs with strong current and large current load, it is necessary to use multiple insulating layers to achieve multi-layer reinforcement.

Copper mesh layer: The function is to strengthen the shielding and grounding protection.

Waterproof layer: The function is to strengthen the waterproof effect.

Semi-conductive layer (including semi-conductive tape and semi-conductive paint): The function of semi-conductive tape is to equalize the effect of electric field, especially to reduce loss and prevent partial discharge during operation. Semi-conductive paint has the same function as semi-conductive tape, and applying this layer has the effect of strengthening.

Insulation recovery layer: It is based on the structure of the cable body, the material is the same as the cable raw material, and the function is the same.

The first and second connection blocks 12: the core part of the power transmission of the cable, the two ends of the copper core of the cable can be butted together, and the copper conductors can be seamlessly fused back by the high temperature to reach the melting point of the copper material to achieve the daily operation of the copper conductors to transmit current. parameter requirements.

Inner semi-conductive recovery layer: the function is to reduce loss and prevent partial discharge, and play a strengthening role.

In addition, in order to have the same structure as the cable, the intermediate connection restoration of the cable body provided by the present invention may further include an outer semi-conductive layer, a copper shield, an inner sheath, a steel armor and an outer sheath. Each of the above parts is the same part as the part on the damaged cable.

Among them, the outer semiconducting layer: This layer indicates that this layer exists on the body structure of the cable structure, and this layer should be restored according to its structure.

Copper shielding: This is the original shielding layer on the cable structure. TMJ is restored by the laying of copper mesh to meet the structural requirements.

Inner sheath: This layer is the structural layer inside the cable body, and its function is the layer of internal structure protection in the structure of the cable body.

Steel armor: The second body structure of the cable from the inside to the outside is mainly to prevent the stab and impact of external force and achieve the function of buffering.

Outer sheath: This is the outermost layer of the cable structure layer. The body material is also PVC material. The material used in the recovery of this layer is also the tape from PVC. After multiple layers of coating, the effect of the original PVC material of the cable is achieved. .

For the intermediate connection repair body of the cable body provided above, the present invention also provides an application method for the intermediate connection repair body of the cable body, as shown in FIG. 3 , the method includes:

S31. Obtain the model of the broken cable;

S32. Obtain the intermediate connection restoration of the cable body according to the cable model; wherein the diameter of the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body is the same as the diameter of the broken cable The diameter of the copper core is equal;

S33 , placing welding flux in the conductor connecting part of the intermediate connection restoration body of the cable body to weld the copper core of the broken cable.

The current traditional cable intermediate joint accessory-conductor is crimped by copper tube, the degree of crimping between the copper tube and the original conductor of the cable, the size of the contact surface and the material of the tube, which will directly affect the current carrying capacity; if the selection is improper, it will lead to The heat at the crimp will destroy the insulation performance and eventually cause an accident. And the copper core is crimped, not bendable, not subject to force and displacement. The through welding technology (TMJ) adopted in the present invention adopts the exothermic welding technology, and has the characteristics of equal conductor diameter, low resistance, high strength, and the welding point never ages. In addition, after the repair is completed, the cable at the repair site can be bent, and there is no need to worry about the influence of cable drag.

In order to further reduce the complexity of cable repair, another application method of the intermediate connection repair body of the cable body is also provided, as shown in Figure 4, which specifically includes

S41. Obtain the model of the damaged cable;

S42. Obtain the intermediate connection restoration of the cable body according to the cable model; wherein the diameter of the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body is the same as the diameter of the broken cable The diameter of the copper core is equal;

S43. Insert the copper core of the damaged cable into the conductor connection part of the intermediate connection repair body of the cable body, and use conductive glue to connect the copper core of the damaged cable to the first connection block in the conductor connection part Or after the second connection block is glued, the damaged cable and the intermediate connection repair body of the cable body are wrapped with polyvinyl chloride.

In addition, the present invention also provides a technology for repairing the intermediate connection of the cable body. The technology is 10KV-20KV cable through fusion technology (TMJ). The cable straight-through welding technology is based on the principle of the body structure of the XLPE cable. The cable through welding technology fuses and combines the structure of the cable body to form a shielding body with no stress cone and no moving interface with consistent essential characteristics.

The process of using the cable straight-through fusion technology to complete the repair of the intermediate connection of the cable body is as follows:

The cable conductors are welded to equal diameters using chemical exothermic welding technology. During the welding process, the broken copper conductor is fixed by using the prepared cable conductor mold, and the flux is injected into the mold for welding. By adopting exothermic welding technology, the welded copper conductors can have the characteristics of low resistance, high strength, and the welding point will never age, and can withstand fault current impact and long-term high-current operation, which is more durable and reliable. It is also possible to splicing the copper core to make the repaired cable bendable, so that there is no need to worry about the influence of cable dragging.

The raw materials of the cable are used, and the layers of the cable are restored layer by layer according to the original structure of the cable; wherein, in order to save the raw materials and increase the flexibility of the repaired cable, in the present invention, the copper shielding and grounding functions in the original cable are shielded. The copper sheet of the layer is replaced with a copper mesh.

Figure 5 shows the specific structure of the cable body after repairing using the above technology.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (8)

1. A cable body intermediate connection repair technology, characterized in that, comprising: a conductor connection part and a cladding part; The cladding part is sleeved on the conductor connecting part, and the length of the conductor connecting part is equal to the length of the cladding part. 2 . The intermediate connection repair of a cable body according to claim 1 , wherein the conductor connection part comprises a first connection block, a second connection block and an intermediate block; 2 . An intermediate block is disposed between the first connection block and the second connection block, and the length of the first connection block and the length of the second connection block are both smaller than the length of the intermediate block. 3 . The intermediate connection restoration of a cable body according to claim 2 , wherein the intermediate block comprises a first inner semi-conductive recovery layer, a first insulation recovery layer, a first semi-conductive layer, a first a copper mesh layer, a first insulating layer and a first protective layer; One surface of the first inner semi-conductive recovery layer is attached to the second connection block; the other surface of the first inner semi-conductive recovery layer is attached to a surface of the first insulating recovery layer; The other surface of the first insulation recovery layer is attached to a surface of the first semiconductive layer; the other surface of the first semiconductive layer is attached to a surface of the first copper mesh layer; the The other surface of the first copper mesh layer is attached to a surface of the first insulating layer; the other surface of the first insulating layer is attached to a surface of the first protective layer; the first The other surface of the protective layer is attached to the first connection block. 4 . The intermediate connection restoration of a cable body according to claim 1 , wherein the cladding part comprises: a second inner semi-conductive restoration layer, a second insulating restoration layer, a second semi-conductive layer, a second copper mesh layer and a second insulating layer; The second inner semi-conductive recovery layer is sleeved on the conductor connection part, and the second inner semi-conductive recovery layer is closely attached to the conductor connection part; the second insulation recovery layer is sleeved on the conductor connection part. the second inner semi-conductive recovery layer; the second semi-conductive layer is sleeved on the second insulating recovery layer; the second copper mesh layer is sleeved on the semi-conductive layer; the second The insulating layer is sleeved on the second copper mesh layer. 5. The intermediate connection repair body of a cable body according to claim 4, wherein the cladding part further comprises: a second protective layer, a first waterproof layer, a third copper mesh layer, a third insulating layer layer, heat shrinkable layer, second waterproof layer, armor layer and third protective layer; The second protective layer is sleeved on the second insulating layer; the first waterproof layer is sleeved on the second protective layer; the third copper mesh layer is sleeved on the first waterproof layer the third insulating layer is sleeved on the third copper mesh layer; the heat shrinkable layer is sleeved on the third insulating layer; the second waterproof layer is sleeved on the heat shrinkable layer the armoring layer is sleeved on the second waterproof layer; the third protective layer is sleeved on the armoring layer. 6 . The intermediate connection restoration of a cable body according to claim 3 or 5 , wherein the material of the first protective layer, the material of the second protective layer or the material of the third protective layer The material is polyvinyl chloride. 7. An application method for an intermediate connection restoration of a cable body, characterized in that, comprising: Get the broken cable model; The intermediate connection restoration of the cable body according to any one of claims 1-6 is obtained according to the cable model; wherein the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body are obtained. The diameter of the connection block is equal to the diameter of the copper core of the broken cable; Soldering flux is placed in the conductor connection portion of the intermediate connection restoration of the cable body to weld the copper core of the broken cable. 8. An application method for an intermediate connection restoration of a cable body, characterized in that comprising: Get the damaged cable model; The intermediate connection restoration of the cable body according to any one of claims 1-6 is obtained according to the cable model; wherein the first connection block and the second connection block in the conductor connection part of the intermediate connection restoration of the cable body are obtained. The diameter of the connection block is equal to the diameter of the copper core of the broken cable; Insert the copper core of the damaged cable into the conductor connection part of the intermediate connection repair body of the cable body, and use conductive glue to connect the copper core of the damaged cable to the first connection block or the first connection block in the conductor connection part. After the two connection blocks are bonded, the damaged cable and the intermediate connection repair body of the cable body are wrapped with polyvinyl chloride.

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