CN214850429U

CN214850429U - Glue injection type cold-shrinkable cable intermediate joint

Info

Publication number: CN214850429U
Application number: CN202121279665.2U
Authority: CN
Inventors: 左平胜; 左红炎
Original assignee: Hubei Dele Electric Power Technology Co ltd
Current assignee: Hubei Dele Electric Power Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-11-23
Anticipated expiration: 2031-06-09

Abstract

The utility model provides an injecting glue formula shrinkage cable intermediate head relates to power equipment technical field, including inner sheath and three-phase cable, the inner sheath nests in the junction of three-phase cable, many the three-phase cable nests in the main insulation, many the junction nestification of three-phase cable has the oversheath, the oversheath cladding is on the inner sheath surface, oversheath surface nestification has the columnar box, the columnar box includes symmetrical upper half shell and lower half shell, and upper half shell and lower half shell constitute complete cavity columnar shape, the fixed orifices has been seted up to the edge of columnar box, the columnar box passes through the expansion bolts sealing fixation in fixed orifices and the fixed orifices. The design of the column-shaped box is adopted, the intermediate joint is protected, the intermediate joint can be fixed at a certain position, and the external environment is prevented from changing to cause the intermediate joint to break down.

Description

Glue injection type cold-shrinkable cable intermediate joint

Technical Field

The utility model relates to a power equipment technical field especially relates to an injecting glue formula shrinkage cable intermediate head.

Background

An intermediate joint is generally referred to as a cable intermediate joint, i.e. a cable joint in the middle of a cable run. The intermediate connector is a cable accessory for the intermediate connection of cross-linked cables or oil-immersed cables of various voltage classes. The main function is to keep the circuit smooth, keep the cable sealed, and ensure the insulation grade at the cable joint, so that the cable can run safely and reliably.

The cable intermediate joint is used as an important link during cable butt joint, and partial discharge can be generated due to defects caused during any installation, so that insulation degradation and even breakdown are caused. A lot of cable accessories puncture accidents can occur every year, more than 95% of installers cannot meet the standard in quality during installation, for example, the sharp corner of a crimping pipe is not polished: in the installation of the connector, the surface of the crimping part of the conductor core of the cable is not processed smoothly, and metal burrs, tips and edges and corners exist. When the cable is operated, the irregular parts generate point discharge due to electric field concentration.

After the installation of the cold-shrinkable cable intermediate joint in the prior art is completed, the intermediate joint has poor bending resistance due to the fact that the intermediate joint is wrapped by multiple layers of winding wraps, and the intermediate joint is easily damaged in a complex laying environment, so that a fault occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an injecting glue type shrinkage cable intermediate joint.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an injecting glue formula shrinkage cable intermediate head, includes inner sheath and three-phase cable, the inner sheath nestification is in the junction of three-phase cable, many the three-phase cable nestification is in the main insulation, many the junction nestification of three-phase cable has the oversheath, the oversheath cladding is on the inner sheath surface, oversheath surface nestification has the columnar case, the columnar case includes symmetrical upper half shell and lower half shell, and upper half shell and lower half shell constitute complete cavity columnar order, the fixed orifices has been seted up to the edge of columnar case, the columnar case passes through the expansion bolts in fixed orifices and the fixed orifices and seals fixedly. When the cable intermediate joint is installed, the main insulation is sequentially stripped, after the wire cores of the two three-phase cables are subjected to compression joint, the inner sheath is nested at the joint, the spiral supporting strips in the inner sheath are drawn out to enable the inner sheath to be coated at the joint, each three-phase cable is sequentially subjected to compression joint coating, the outer sheath is nested at the joint of the total three-phase cables, the spiral supporting strips in the outer sheath are also drawn out to enable the outer sheath to be coated at the joint, and therefore the coating work of the intermediate joint is achieved; and embedding a cylindrical box outside the middle joint, opening the upper half shell and the lower half shell, ensuring that the middle joint is positioned in the upper half shell and the lower half shell, ensuring that the main insulation is positioned in a pipe body of the cylindrical box, closing the cylindrical box in an aligned mode, and fixing the cylindrical box at a stable supporting wall by adopting an expansion bolt at a fixing hole.

Preferably, both ends of the columnar box are provided with pipe bodies, the pipe bodies and the columnar box are integrally formed, and the pipe bodies are coated on the main insulating surface.

Preferably, the surface array of the pipe body is provided with a plurality of sealing convex ribs, and the sealing convex ribs are abutted to the main insulating surface. The design of the multiple sealing convex ribs ensures the sealing performance between the column box and the main insulator, and meanwhile, glue is poured between the two adjacent sealing convex ribs to effectively seal the tube body and prevent water from entering the column box from the tube body.

Preferably, a sealing gasket is arranged at the interface of the upper half shell and the lower half shell, and the sealing gasket is made of rubber and is bonded with the lower half shell. The sealing gasket ensures the sealing performance between the upper half shell and the lower half shell and prevents dust and water from entering the shell.

Preferably, the inner wall of the lower half shell is fixed with a temperature sensing module and a signal transmitter, the temperature sensing module is electrically connected with the signal transmitter, and the temperature sensing module and the signal transmitter are independently powered. Under the general condition, the trouble of cable is most taken place in intermediate head department, and intermediate head buries in underground still deeply, is difficult to the maintenance of quick location, consequently, often caused the enlarged scale of trouble, caused extra loss, consequently, this product has carried out temperature sensing module and signal transmitter's design in the column type box, when producing the trouble, no matter be along with flashover or the condition of creepage, all can make the interior intensification of column type box, temperature sensing module control signal transmitter sends alarm signal and gives monitoring personnel to in time cut off the power supply or maintain.

Preferably, the middle parts of the outer surfaces of the inner sheath and the outer sheath are respectively provided with a positioning convex ring, the positioning convex rings and the inner sheath or the outer sheath are integrally formed, the positioning convex rings extend towards the two ends of the inner sheath or the outer sheath and are provided with scales, and the scales are parallel to the length direction of the inner sheath or the outer sheath. When carrying out the installation of inner sheath or oversheath, need accurately arrange the sheath in the middle part of junction, otherwise cause the condition that one end is long one end short easily, and the naked eye is difficult to judge between two parties of sheath and junction, consequently, has adopted the design of location convex circle and scale, has guaranteed the centering of sheath.

Advantageous effects

1. In the utility model, when the cable intermediate joint is installed, the main insulation is sequentially stripped, after the wire cores of two three-phase cables are crimped, the inner sheath is nested at the joint, the spiral supporting strips in the inner sheath are drawn out to coat the inner sheath at the joint, each three-phase cable is sequentially crimped and coated, the outer sheath is nested at the joint of the total three-phase cables, the spiral supporting strips in the outer sheath are also drawn out to coat the outer sheath at the joint, and thus the coating work of the intermediate joint is realized; and embedding a cylindrical box outside the middle joint, opening the upper half shell and the lower half shell, ensuring that the middle joint is positioned in the upper half shell and the lower half shell, ensuring that the main insulation is positioned in a pipe body of the cylindrical box, closing the cylindrical box in an aligned mode, and fixing the cylindrical box at a stable supporting wall by adopting an expansion bolt at a fixing hole.

2. The utility model discloses in, the design of the protruding muscle of multiple sealing has been adopted in the body department of columnar order box, guarantees the leakproofness between columnar order box and the main insulation, simultaneously, pours into glue between the protruding muscle of adjacent twice sealing, effectively seals the body, prevents to intake in the columnar order box from the body department.

3. Under the general condition, the trouble of cable is most taken place in intermediate head department, and intermediate head buries in underground still deeply, is difficult to the maintenance of quick location, consequently, often caused the enlarged scale of trouble, caused extra loss, consequently, this product has carried out temperature sensing module and signal transmitter's design in the column type box, when producing the trouble, no matter be along with flashover or the condition of creepage, all can make the interior intensification of column type box, temperature sensing module control signal transmitter sends alarm signal and gives monitoring personnel to in time cut off the power supply or maintain.

4. The utility model discloses in, when carrying out the installation of inner sheath or oversheath, need accurately arrange the sheath in the middle part of junction, otherwise cause the condition that the long one end of one end is short easily, and naked eye is difficult to judge between two parties of sheath and junction, consequently, has adopted the design of location convex ring and scale, has guaranteed the living of sheath neutral.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the center pillar box of the present invention;

fig. 4 is a schematic structural view of the outer sheath of the present invention;

fig. 5 is a schematic structural diagram of the inner sheath of the present invention.

Illustration of the drawings:

1. a columnar box; 101. an upper half shell; 102. a lower half shell; 2. a fixing hole; 3. a pipe body; 4. sealing the convex ribs; 5. a gasket; 6. an outer sheath; 7. main insulation; 8. positioning the convex ring; 9. calibration; 10. a temperature sensing module; 11. a signal transmitter; 12. a three-phase cable; 13. an inner sheath.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The specific embodiment is as follows:

referring to fig. 1-5, an injecting glue formula shrinkage cable intermediate head, including inner sheath 13 and three-phase cable 12, inner sheath 13 nests in three-phase cable 12's junction, many three-phase cable 12 nests in main insulation 7, many three-phase cable 12's junction nestification has oversheath 6, oversheath 6 cladding is on inner sheath 13 surface, oversheath 6 surface nestification has cylindrical box 1, cylindrical box 1 includes symmetrical upper half shell 101 and lower half shell 102, and upper half shell 101 and lower half shell 102 constitute complete cavity cylindricality, fixed orifices 2 have been seted up to cylindrical box 1's edge, cylindrical box 1 is sealed fixed through the expansion bolts in fixed orifices 2 and the fixed orifices 2. When the cable intermediate joint is installed, the main insulation 7 is sequentially stripped, after the wire cores of the two three-phase cables 12 are subjected to compression joint, the inner sheath 13 is nested at the joint, the spiral supporting strips in the inner sheath 13 are drawn out, so that the inner sheath 13 is coated at the joint, each three-phase cable 12 is sequentially subjected to compression joint coating, the outer sheath 6 is nested at the joint of the total three-phase cables 12, the spiral supporting strips in the outer sheath 6 are also drawn out, so that the outer sheath 6 is coated at the joint, and the coating work of the intermediate joint is realized; and then the cylindrical box 1 is embedded outside the middle joint, the upper half shell 101 and the lower half shell 102 are opened, the middle joint is ensured to be positioned in the upper half shell 101 and the lower half shell 102, the main insulation 7 is positioned in the pipe body 3 of the cylindrical box 1, the cylindrical box 1 is aligned and closed, and the fixing hole 2 is fixed on a stable supporting wall by adopting an expansion bolt.

Specifically, both ends of the columnar box 1 are provided with the tube body 3, the tube body 3 and the columnar box 1 are integrally formed, and the tube body 3 is coated on the surface of the main insulation 7.

Specifically, 3 surface arrays of body are equipped with the protruding muscle 4 of multichannel sealed, and sealed protruding muscle 4 offsets with 7 surfaces of main insulation. The design of the multi-sealing convex ribs 4 guarantees the sealing performance between the column-shaped box 1 and the main insulator 7, and meanwhile, glue is poured between the two adjacent sealing convex ribs 4 to effectively seal the tube body 3 and prevent water from entering the column-shaped box 1 from the tube body 3.

Specifically, a gasket 5 is arranged at the interface between the upper half shell 101 and the lower half shell 102, and the gasket 5 is made of rubber and is bonded with the lower half shell 102. The gasket 5 is designed to ensure the tightness between the upper shell half 101 and the lower shell half 102 and to prevent dust and water from entering the shell.

Specifically, the inner wall of the lower half-shell 102 is fixed with the temperature sensing module 10 and the signal emitter 11, the temperature sensing module 10 is electrically connected with the signal emitter 11, and the temperature sensing module 10 and the signal emitter 11 are independently powered. Under general conditions, the trouble of cable mostly takes place in intermediate head department, and intermediate head still buries in underground deeply as usual, is difficult to fix a position the maintenance fast, consequently, often caused the enlarged change of trouble, caused extra loss, consequently, this product has carried out temperature sensing module 10 and signal transmitter 11's design in columnar box 1, when producing the trouble, no matter be along with flashover or the condition of creepage, all can make columnar box 1 internal heating up, temperature sensing module 10 control signal transmitter 11 sends alarm signal and gives monitoring personnel to in time cut off the power supply or maintain.

Specifically, the middle parts of the outer surfaces of the inner sheath 13 and the outer sheath 6 are respectively provided with a positioning convex ring 8, the positioning convex rings 8 and the inner sheath 13 or the outer sheath 6 are integrally formed, the positioning convex rings 8 extend towards the two ends of the inner sheath 13 or the outer sheath 6 to be provided with scales 9, and the scales 9 are parallel to the length direction of the inner sheath 13 or the outer sheath 6. When carrying out the installation of inner sheath 13 or oversheath 6, need accurately place the sheath in the middle part of junction, otherwise cause the condition that one end is long one end short easily, and the naked eye is difficult to judge between two parties of sheath and junction, consequently, has adopted the design of location convex ring 8 and scale 9, has guaranteed the centering of sheath.

The utility model discloses a theory of operation: in the product, when the cable intermediate joint is installed, the main insulation 7 is sequentially stripped, after the wire cores of two three-phase cables 12 are subjected to compression joint, the inner sheath 13 is nested at the joint, the spiral supporting strips in the inner sheath 13 are drawn out, so that the inner sheath 13 is coated at the joint, each three-phase cable 12 is sequentially subjected to compression joint coating, the outer sheath 6 is nested at the joint of the total three-phase cables 12, the spiral supporting strips in the outer sheath 6 are also drawn out, so that the outer sheath 6 is coated at the joint, and the coating work of the intermediate joint is realized; and then the cylindrical box 1 is embedded outside the middle joint, the upper half shell 101 and the lower half shell 102 are opened, the middle joint is ensured to be positioned in the upper half shell 101 and the lower half shell 102, the main insulation 7 is positioned in the pipe body 3 of the cylindrical box 1, the cylindrical box 1 is aligned and closed, and the fixing hole 2 is fixed on a stable supporting wall by adopting an expansion bolt. Meanwhile, when the inner sheath 13 or the outer sheath 6 is installed, the sheath needs to be accurately arranged in the middle of the joint, otherwise, the situation that one end is long and the other end is short is easily caused, and the naked eye cannot easily judge the centering of the sheath and the joint, so that the design of the positioning convex ring 8 and the scales 9 is adopted, and the centering of the sheath is ensured.

The design of the multi-sealing convex ribs 4 is adopted at the pipe body 3 of the column-shaped box 1, the sealing performance between the column-shaped box 1 and the main insulator 7 is guaranteed, and meanwhile, glue is poured between the adjacent two sealing convex ribs 4 to effectively seal the pipe body 3 and prevent water from entering the column-shaped box 1 from the pipe body 3.

Under general conditions, the trouble of cable mostly takes place in intermediate head department, and intermediate head still buries in underground deeply as usual, is difficult to fix a position the maintenance fast, consequently, often caused the enlarged change of trouble, caused extra loss, consequently, this product has carried out temperature sensing module 10 and signal transmitter 11's design in columnar box 1, when producing the trouble, no matter be along with flashover or the condition of creepage, all can make columnar box 1 internal heating up, temperature sensing module 10 control signal transmitter 11 sends alarm signal and gives monitoring personnel to in time cut off the power supply or maintain.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an injecting glue formula shrinkage cable intermediate head, includes inner sheath (13) and three-phase cable (12), inner sheath (13) nests in the junction of three-phase cable (12), many three-phase cable (12) nestification is in main insulation (7), many the junction nestification of three-phase cable (12) has oversheath (6), oversheath (6) cladding is on inner sheath (13) surface, its characterized in that: oversheath (6) surface nestification has cylindrical box (1), cylindrical box (1) is including symmetrical upper half shell (101) and lower half shell (102), and upper half shell (101) and lower half shell (102) constitute complete cavity column type, fixed orifices (2) have been seted up to the edge of cylindrical box (1), cylindrical box (1) is sealed fixed through the expansion bolts in fixed orifices (2) and fixed orifices (2).

2. The glue injection type cold-shrink cable intermediate joint as claimed in claim 1, wherein: both ends of the columnar box (1) are provided with pipe bodies (3), the pipe bodies (3) and the columnar box (1) are integrally formed, and the pipe bodies (3) are coated on the surface of the main insulator (7).

3. The glue injection type cold-shrink cable intermediate joint as claimed in claim 2, wherein: the surface array of the pipe body (3) is provided with a plurality of sealing convex ribs (4), and the sealing convex ribs (4) are abutted to the surface of the main insulator (7).

4. The glue injection type cold-shrink cable intermediate joint as claimed in claim 1, wherein: and a sealing gasket (5) is arranged at the interface of the upper half shell (101) and the lower half shell (102), and the sealing gasket (5) is made of rubber and is bonded with the lower half shell (102).

5. The glue injection type cold-shrink cable intermediate joint as claimed in claim 1, wherein: the temperature sensing module (10) and the signal transmitter (11) are fixed on the inner wall of the lower half shell (102), the temperature sensing module (10) is electrically connected with the signal transmitter (11), and the temperature sensing module (10) and the signal transmitter (11) are independently powered.

6. The intermediate joint of the glue injection type cold-shrink cable according to any one of claims 1 to 5, wherein: the utility model discloses a positioning device, including inner sheath (13) and oversheath (6), the middle part of inner sheath (13) and oversheath (6) surface all is equipped with location protruding circle (8), and location protruding circle (8) and inner sheath (13) or oversheath (6) integrated into one piece, the both ends extension of location protruding circle (8) to inner sheath (13) or oversheath (6) is equipped with scale (9), and scale (9) are parallel with the length direction of inner sheath (13) or oversheath (6).