CN112117714A - Cable intermediate joint installation method and expansion device - Google Patents
Cable intermediate joint installation method and expansion device Download PDFInfo
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- CN112117714A CN112117714A CN202010636825.8A CN202010636825A CN112117714A CN 112117714 A CN112117714 A CN 112117714A CN 202010636825 A CN202010636825 A CN 202010636825A CN 112117714 A CN112117714 A CN 112117714A
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- 238000002955 isolation Methods 0.000 claims abstract description 30
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
- H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
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- Cable Accessories (AREA)
Abstract
A cable intermediate joint installation method and an expansion device are provided, the cable intermediate joint installation method comprises the following steps: one end of the middle joint is spread and kept in a supporting state; attaching the isolation layer to the fracture of the insulation shielding layer of the first cable; sleeving the intermediate joint on the first cable until the insulating layer of the first cable is exposed at the other end of the intermediate joint; connecting the first cable with another second cable to be butted; pulling the intermediate joint along the direction from the first cable to the second cable until the insulating layers of the first cable and the second cable enter the interior of the intermediate joint; the insulation layer is removed from the first cable. According to the method provided by the embodiment of the invention, one end of the middle joint is expanded, so that the difficulty of the first cable penetration is reduced. Through arrange the isolation layer on the port of the insulation shielding layer at first cable, can effectually avoid the decarburizing granule on the insulation shielding layer to fall into the intermediate head.
Description
Technical Field
The invention belongs to the field of high-voltage power cables, and particularly relates to a cable intermediate joint installation method and an expansion device.
Background
With the construction of urbanization and the sharp increase of electric quantity demand, the construction of long-distance high-voltage power transmission is more and more, and the demand of cable accessories is more and more. In cable accessories, the intermediate joint for cable butt joint is difficult to avoid and needs to be used in large quantities.
For the high-voltage power cable intermediate joint, two installation modes are generally adopted, one mode is pre-expansion, and the other mode is sliding installation. When using the installation of sliding type, in the installation, intermediate head main part can with the insulation shield layer direct contact of cable, and the charcoal particle that takes off on the cable insulation shield layer is inside very easily the adhesion intermediate head, influences the performance of intermediate head and cable contact surface, and then causes cable line trouble.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for installing a cable intermediate joint, which solves the problem that decarburized particles are easy to adhere to the intermediate joint in the installation process. The invention also provides a cable intermediate joint expansion device.
According to the cable intermediate joint installation method provided by the embodiment of the first aspect of the invention, the method comprises the following steps: one end of the middle joint is spread and kept in a supporting state; attaching an isolation layer to an insulation shielding layer of a first cable and covering a fracture of the insulation shielding layer; aligning one expanded end of the intermediate joint with a to-be-connected end of the first cable, and sleeving the intermediate joint on the first cable until an insulating layer of the first cable is exposed at the other end of the intermediate joint; connecting the first cable with another second cable to be docked; pulling the intermediate joint along the first cable in the direction of the second cable until the insulating layer of the second cable enters the inside of the intermediate joint; removing the insulation from the first cable.
The method for installing the cable intermediate connector provided by the embodiment of the invention at least has the following technical effects: in the installation of intermediate head, expand through the one end with intermediate head, can be convenient for first cable from the expansion position pass intermediate head, reduced the degree of difficulty that first cable penetrated. Through arrange the isolation layer of certain length on the insulation shield layer of first cable, can effectually avoid the decarburizing granule on the insulation shield layer to fall into the intermediate head. After the first cable and the second cable are butted, the insulating layer of the first cable and the insulating layer of the second cable are pulled into the intermediate joint, so that the protective effect of the intermediate joint can be fully exerted.
According to some embodiments of the invention, the insulation layer is a heat shrink tube or a cold shrink tube.
According to some embodiments of the invention, the first cable and the second cable are of the same length in the intermediate joint after the intermediate joint has been installed.
According to some embodiments of the invention, the method for installing the cable intermediate joint further comprises the following steps: and coating lubricating oil on the outer surface of the isolation layer.
According to some embodiments of the invention, the method for installing the cable intermediate joint further comprises the following steps: connecting the first cable and the second cable using a connecting tube.
According to a second aspect of the invention, an expansion device for an intermediate joint of a cable comprises: the guide part is used for expanding one end of the middle joint; the expansion part is arranged on the outer surface of the guide part and is used for supporting one end of the intermediate joint which is expanded; a first support part connected to the expansion part; a second support part fastened to the other end of the intermediate joint; a tightening part, one end of which is connected with the first support part and the other end of which is connected with the second support part, for tightening the first support part and the second support part; the tightening part, the first supporting part and the second supporting part are used together for assisting the expansion part to support one end of the middle joint which is expanded.
The cable intermediate joint expansion device provided by the embodiment of the invention has the following technical effects: one end of the middle joint can be propped open through the guide part, and then the expansion part is enabled to have a certain supporting foundation. One end that can realize strutting the guide part through expansion portion, tightening part, first supporting part and second supporting part carries out continuation support to guarantee still can support the one end of intermediate head after the guide part is demolishd, and then can make the cable remove more smoothly in the intermediate head. Compared with the installation process of the traditional intermediate joint, the cable intermediate joint expansion device provided by the embodiment of the invention can reduce the installation work difficulty and improve the installation efficiency.
According to some embodiments of the invention, the guide portion is a guide cone.
According to some embodiments of the invention, the expansion portion is an expansion shoe.
According to some embodiments of the invention, a plurality of lifting bolts are connected to the first supporting portion and the second supporting portion, and the plurality of lifting bolts are used for connecting the tightening portion.
According to some embodiments of the invention, the tightening part is an elastic connecting band.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1-1 is a schematic view of an embodiment of a cable intermediate joint expansion device of the present invention in an operating condition (the intermediate joint is not yet spread);
fig. 1-2 are working diagrams of the cable intermediate joint expansion device according to the embodiment of the invention (one end of the intermediate joint is expanded);
FIGS. 1-3 are schematic views of an embodiment of a cable intermediate joint expansion device of the present invention with the guides removed;
fig. 2 is a schematic structural view of a first cable and an isolation layer according to an embodiment of the present invention;
FIG. 3-1 is a wiring diagram of an embodiment of the invention (first cable and isolation layer have been threaded into the intermediate connector);
FIG. 3-2 is a wiring diagram of an embodiment of the present invention (the first cable and the second cable are wired);
FIGS. 3-3 are wiring diagrams of embodiments of the invention (with the isolation layer removed);
fig. 3-4 are diagrams of a connection configuration of an embodiment of the present invention (with the cable intermediate joint expansion device of an embodiment of the present invention removed).
Reference numerals:
a guide part 100,
An expansion part 200,
A first supporting part 300,
A second supporting part 400,
A tightening part 500,
An intermediate joint 600,
An eye screw 700,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
A cable intermediate joint installation method according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1-1 to 3-4.
The method for installing the cable intermediate connector comprises the following steps of:
one end of the intermediate joint 600 is spread and maintained in a supporting state;
attaching the isolation layer 810 to the insulation shielding layer of the first cable 820 and covering the insulation shielding layer fracture;
aligning the one end of the middle joint 600 that is spread apart with the end to be connected of the first cable 820, and sheathing the middle joint 600 on the first cable 820 until the insulation layer of the first cable 820 is exposed at the other end of the middle joint 600;
connecting the first cable 820 with another second cable 830 to be docked;
pulling the intermediate connector 600 along the first cable 820 towards the second cable 830 until the insulation layer of the second cable 830 enters the interior of the intermediate connector 600;
the isolation layer 810 is removed from the first cable 820.
Referring to fig. 1-1 to 3-4, before the first cable 820 is inserted into the intermediate joint 600, one end of the intermediate joint 600 needs to be spread open, so that the first cable 820 can enter the intermediate joint 600 more smoothly. In some embodiments of the present invention, one end of the middle joint 600 is spread by the cable middle joint expansion device of the embodiments of the present invention.
In order to ensure that no decarburized particles on the insulation shielding layer adhere to the inside of the intermediate joint 600 during the process of penetrating the intermediate joint 600 and connecting the first cable 820, especially decarburized particles after polishing the fracture of the insulation shielding layer, the insulation shielding layer and the fracture of the insulation shielding layer of the first cable 820 are wrapped by the isolation layer 810 before the first cable 820 penetrates the intermediate joint 600, so as to ensure that the insulation shielding layer and the fracture of the insulation shielding layer do not contact with the intermediate joint 600.
After the insulation layer 810 wraps the insulation shielding layer fracture of the first cable 820, the intermediate joint 600 aligns the expanded end with the to-be-connected end of the first cable 820 and covers the first cable 820 until the insulation layer of the first cable 820 is exposed from the other end of the intermediate joint 600. The mating of the first cable 820 and the second cable 830 may begin at this point, and after the mating is complete, the intermediate joint 600 may be pulled along the first cable 820 in the direction of the second cable 830 until the insulation of the first cable 820 and the insulation of the second cable 830 are within the protection of the intermediate joint 600. In practice, the insulation portions for the first cable 820 and the second cable 830 are completely embedded in the protection of the intermediate connector 600.
After the above steps are completed, and the installation of the intermediate joint 600 is substantially completed, the isolation layer 810 is simply removed from the first cable 820. In practice, the isolation layer 810 can be cut by a special cutter and pulled out of the middle joint 600.
According to the method for installing the cable intermediate joint, in the installation process of the intermediate joint 600, one end of the intermediate joint 600 is expanded, so that the first cable 820 can conveniently pass through the intermediate joint 600 from the expanded position, and the difficulty in threading the first cable 820 is reduced. By arranging the isolation layer 810 with a certain length on the insulation shielding layer of the first cable 820, the decarburized particles on the insulation shielding layer can be effectively prevented from falling into the intermediate joint 600. After the first cable 820 and the second cable 830 are butted, the insulating layer of the first cable 820 and the insulating layer of the second cable 830 are pulled into the intermediate joint 600, and the protective function of the intermediate joint 600 can be sufficiently exerted.
In some embodiments of the present invention, the isolation layer 810 employs a heat shrink tube or a cold shrink tube. The heat shrink tube has the characteristic of heat shrink, and in practical operation, the heat shrink tube is sleeved on the first cable 820, and then the heat shrink tube is in close contact with the first cable 820 through the hot air gun, so that the isolation effect of the isolation layer 810 on the first cable 820 can be ensured. Similarly, in practical operation, the cold shrink tube is sleeved on the first cable 820, and then the skeleton bar in the cold shrink tube is taken out, so that the isolation effect of the isolation layer 810 on the first cable 820 can be ensured.
In some embodiments of the present invention, the first cable 820 and the second cable 830 are of the same length in the intermediate joint 600 after the intermediate joint 600 is installed. In actual operation, although a certain protection effect can be achieved by pulling the insulating layer of the first cable 820 and the insulating layer of the second cable 830 into the intermediate joint 600, if the connection point of the first cable 820 and the second cable 830 is too close to one side of the intermediate joint 600, the insulation shielding fracture of the cable on the side is easily exposed from the intermediate joint 600, which may cause great potential safety hazard to electricity utilization. And the lengths of the first cable 820 and the second cable 830 in the intermediate joint 600 are consistent, the first cable 820 and the second cable 830 can be protected to the greatest extent.
In some embodiments of the present invention, the method for installing the cable intermediate connector further includes the following steps: and lubricating oil is coated on the outer surface of the isolating layer 810. The surface of the isolation layer 810 is coated with lubricating oil, so that friction between the isolation layer 810 and the intermediate joint 600 and the first cable 820 can be effectively reduced, and the isolation layer 810 can conveniently enter the intermediate joint 600 and can be finally directly pulled out from the intermediate joint 600 and the first cable 820. Further, the friction of the spacer 810 with the expansion part 200 can also be reduced.
In some embodiments of the present invention, the method for installing the cable intermediate connector further includes the following steps: lubricating oil is applied to the outer surface of the first cable 820. Applying a lubricating oil to the outer surface of the first cable 820 may reduce friction between the first cable 820 and the intermediate joint 600. Lubricating oil is usually applied to the outer surface of the isolation layer 810 at the same time, so that friction with the intermediate joint 600 can be reduced to the greatest extent, and the whole installation process is smoother.
In some embodiments of the present invention, the method for installing the cable intermediate connector further includes the following steps: lubricating oil is applied to the outer surface of the second cable 830. By coating the lubricating oil on the outer surface of the second cable 830, the resistance when the second cable 830 is pulled into the intermediate joint 600 can be reduced, and the cable can be protected, so that the cable can be effectively prevented from being damaged in the pulling process.
In some embodiments of the present invention, the surfaces of the guiding portion 100 and the expanding portion 200 are also coated with a lubricant, so that firstly, the resistance of the guiding portion 100 and the expanding portion 200 in spreading the end of the middle joint 600 can be effectively reduced, and secondly, the friction between the subsequent first cable 820 and the expanding portion 200 can be reduced.
In some embodiments of the present invention, the method for installing the cable intermediate connector further includes the following steps: a guide head is mounted on the conductor of the first cable 820. The guide head is arranged on the conductor of the first cable 820, so that the first cable 820 can be conveniently penetrated in the intermediate joint 600, the resistance of the first cable 820 in the intermediate joint 600 is reduced, and the whole installation efficiency can be effectively improved. The guide head is specifically mounted on the insulation layer of the first cable 820. The shape of the guide head may be generally conical, hemispherical, etc.
In some embodiments of the present invention, the method for installing the cable intermediate connector further includes the following steps: the first cable 820 and the second cable 830 are connected using a connection pipe 840. By connecting the first cable 820 and the second cable 830 through the connecting tube 840, on one hand, the strength after connection can be ensured, and the first cable 820 and the second cable 830 can be pulled conveniently, and on the other hand, the conductive capability after the first cable 820 and the second cable 830 are butted can be ensured not to be weakened. The connection is typically made more secure by using a crimp sleeve 850 to assist in the connection after the connection is made using the connector 840.
In some embodiments of the present invention, the barrier layer 810 is a teflon tape or a nylon tape. Nylon and polytetrafluoroethylene are common materials, and the price is low, and the batch production is convenient to carry out. Meanwhile, since the isolation layer 810 itself needs to rub against the intermediate connector 600 and the cable for a long time, loss is easily caused, and cost can be effectively reduced by using nylon or teflon which is cheap. In addition, the surface of the teflon tape or the nylon tape is relatively smooth, which can effectively reduce the friction between the isolation layer 810 and the intermediate connector 600 and the first cable 820.
According to a second aspect of the invention, an expansion device for an intermediate joint of a cable comprises: a guide portion 100, an expansion portion 200, a first support portion 300, a second support portion 400, and a tightening portion 500. A guide portion 100 for spreading one end of the intermediate joint 600; an expansion part 200 provided on an outer surface of the guide part 100, for supporting one end of the intermediate joint 600 to be expanded; a first support part 300 connected to the expanding part 200; a second support part 400 fastened to the other end of the intermediate joint 600; a tightening part 500 having one end connected to the first support part 300 and the other end connected to the second support part 400, for tightening the first support part 300 and the second support part 400; the tightening part 500, the first supporting part 300, and the second supporting part 400 serve to assist the expansion part 200 in supporting one end of the intermediate joint 600 to be spread.
Referring to fig. 1-1 to 3-4, the inner surface of the intermediate joint 600 has a cylindrical structure. The expanding portion 200 is a ring-shaped structure that can be closely fitted to the rear end of the guide portion 100. The expanding portion 200 is fixed to the trailing end of the guide portion 100, and the guide portion 100 and the expanding portion 200 are integrated. The guide portion 100 and the expansion portion 200 are integrally formed to expand one end of the intermediate joint 600, and the second support portion 400 is fixed to the other end of the intermediate joint 600. The first supporting part 300 is coupled to the expanding part 200, and after the first supporting part 300 and the second supporting part 400 are coupled by the tightening part 500, a stable pulling force can be formed between the first supporting part 300 and the second supporting part 400, and it can be ensured by the pulling force that after the guide part 100 is removed, one end of the intermediate joint 600 can be continuously supported by the expanding part 200, the first supporting part 300, the second supporting part 400 and the tightening part 500. When the guide portion 100 is removed, the end of the intermediate connector 600 that is spread apart allows the first cable 820 to easily pass through the intermediate portion.
The use of the cable intermediate joint expansion device according to the embodiment of the present invention will be briefly described.
When the cable connection is required, the guide portion 100, the expansion portion 200, and the first support portion 300 are assembled, one end of the guide portion 100 to be inserted is selected, and then the second support portion 400 is fixed to the other end of the intermediate joint 600. Then, the whole body formed by the guide portion 100 and the expansion portion 200 is slowly brought into one end of the intermediate joint 600 by using the plate hoist, and the inner surface of the entire intermediate joint 600 is gradually spread during the introduction until the main body portion of the expansion portion 200 is brought into the intermediate joint 600. The first support 300 and the second support 400 are then temporarily coupled using the constricted portion. The guide 100 is then removed, at which point the first cable 820, which has been sheathed with the insulation 810, can be threaded through the end of the intermediate joint 600 that is now open, until the joint is exposed at the other end. Finally, the connection of the first cable 820 and the second cable 830 is completed, and the insulation layer of the first cable 820 and the insulation layer of the second cable 830 are pulled into the intermediate joint 600. After the installation is completed, the isolation layer 810, the guide portion 100, the expansion portion 200, the first support portion 300, the second support portion 400, and the tightening portion 500 may be removed.
According to the cable intermediate joint expansion device of the embodiment of the present invention, one end of the intermediate joint 600 can be expanded by the guide portion 100, and the expansion portion 200 has a certain supporting base. The one end of the guide part 100 which is propped open can be continuously supported through the expansion part 200, the tightening part 500, the first supporting part 300 and the second supporting part 400, so that one end of the intermediate joint 600 can be supported after the guide part 100 is detached, and further, the cable can move in the intermediate joint 600 more smoothly. Compared with the installation process of the traditional intermediate joint 600, the cable intermediate joint expansion device provided by the embodiment of the invention can reduce the installation work difficulty and improve the installation efficiency.
In some embodiments of the present invention, the pilot portion 100 employs a pilot cone. The guide 100 may take many forms and may take the form of a cone, hemisphere, or the like. In the embodiment of the present invention, the guide portion 100 uses the guide cone not for guiding the first cable 820 but for better expanding the intermediate joint 600, so that the volume of the guide portion 100 is large. And the taper shape can better expand one end of the middle joint 600.
In some embodiments of the present invention, the expansion 200 is an expansion shoe. The expansion portion 200 is preferably attached to the guide portion 100 by using an expansion shoe, and is preferably adapted to support an end of the intermediate joint 600 after the guide portion 100 is removed.
In some embodiments of the present invention, a plurality of lifting bolts 700 are connected to the first supporting portion 300 and the second supporting portion 400, and the plurality of lifting bolts 700 are used for connecting the tightening portion 500. Referring to fig. 1-1 to 1-3, the first supporting portion 300 and the second supporting portion 400 are respectively provided with a plurality of screw holes, the plurality of screw holes can be used for installing a plurality of lifting bolts 700, and the lifting bolts 700 are installed on the first supporting portion 300 and the second supporting portion 400 and need to be symmetrically arranged, so that the stability of the subsequent tightening portion 500 for connecting the first supporting portion 300 and the second supporting portion 400 can be guaranteed.
In some embodiments of the present invention, the tightening part 500 is an elastic connection band. The use of elastic may allow for a more convenient connection than a rigid connection, and the elastic connection may be more secure.
In some embodiments of the present invention, the first supporting portion 300 and the second supporting portion 400 both adopt a huff-type structure. The half structure is a structure which is originally integrated and is split into two combinations. If such a structure is adopted for the first and second support parts 300 and 400, it is possible to facilitate the rapid disassembly of the first and second support parts 300 and 400 without reducing the structural stability thereof. The first support part 300 and the second support part 400 are directly fastened using bolts, and the first support part 300 and the second support part 400 can be more conveniently detached using the bolts after the intermediate joint 600 is completely installed.
In some embodiments of the invention, the expandable section 200 is of a half-bow construction. The half structure is a structure which is originally integrated and is split into two combinations. With such a structure of the expansion part 200, the intermediate joint 600 can be supported without reducing the structural stability thereof. In addition, the use of the half-type structure facilitates the disassembly of the expansion part 200.
In some embodiments of the present invention, the first and second supporting parts 300 and 400 are made of a metal material. The metal material has better hardness, can guarantee like this that can not take place deformation when tightening part 500 pulls first supporting part 300 and second supporting part 400 through eyebolt 700. In some embodiments of the present invention, the first supporting portion 300 and the second supporting portion 400 are made of stainless steel, aluminum alloy, or brass.
In some embodiments of the present invention, the first and second supporting parts 300 and 400 are made of a hard non-metallic material. In consideration of the need to pull the isolation layer 810 by the first and second support parts 300 and 400, a material having a high hardness needs to be selected even when the first and second support parts 300 and 400 are made of a non-metal material.
In some embodiments of the present invention, the hard non-metallic material is plastic, ceramic, nylon or stainless steel. The nylon or the stainless steel has the advantages of low price and high hardness, and is suitable for large-scale production.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A cable intermediate joint installation method is characterized by comprising the following steps:
one end of the middle joint is spread and kept in a supporting state;
attaching an isolation layer to an insulation shielding layer of a first cable and covering a fracture of the insulation shielding layer;
aligning one expanded end of the intermediate joint with a to-be-connected end of the first cable, and sleeving the intermediate joint on the first cable until an insulating layer of the first cable is exposed at the other end of the intermediate joint;
connecting the first cable with another second cable to be docked;
pulling the intermediate joint along the first cable in the direction of the second cable until the insulating layer of the second cable enters the inside of the intermediate joint;
removing the insulation from the first cable.
2. The method of claim 1, wherein the insulation layer is a heat-shrinkable tube or a cold-shrinkable tube.
3. The method of installing an intermediate joint between cables of claim 1, wherein the lengths of the first and second cables in the intermediate joint are consistent after the intermediate joint is installed.
4. The method of installing a cable intermediate joint according to claim 1, further comprising the steps of: and coating lubricating oil on the outer surface of the isolation layer.
5. The method of installing a cable intermediate joint according to claim 1, further comprising the steps of: connecting the first cable and the second cable using a connecting tube.
6. A cable intermediate joint expansion device, comprising:
the guide part is used for expanding one end of the middle joint;
the expansion part is arranged on the outer surface of the guide part and is used for supporting one end of the intermediate joint which is expanded;
a first support part connected to the expansion part;
a second support part fastened to the other end of the intermediate joint;
a tightening part, one end of which is connected with the first support part and the other end of which is connected with the second support part, for tightening the first support part and the second support part; the tightening part, the first supporting part and the second supporting part are used together for assisting the expansion part to support one end of the middle joint which is expanded.
7. The cable intermediate joint expansion device of claim 6, wherein the guide portion employs a guide cone.
8. The cable intermediate joint expansion device of claim 6, wherein the expansion portion employs expansion tiles.
9. The cable intermediate joint expansion device of claim 6, wherein a plurality of eye screws are connected to both the first support portion and the second support portion, and the eye screws are used for connecting the tightening portion.
10. A cable intermediate joint expansion device according to claim 6 or 9, wherein the tightening part is an elastic connecting band.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636825.8A CN112117714A (en) | 2020-07-03 | 2020-07-03 | Cable intermediate joint installation method and expansion device |
| PCT/CN2021/085526 WO2022001270A1 (en) | 2020-07-03 | 2021-04-06 | Installation method and expansion device for cable intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636825.8A CN112117714A (en) | 2020-07-03 | 2020-07-03 | Cable intermediate joint installation method and expansion device |
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| Publication Number | Publication Date |
|---|---|
| CN112117714A true CN112117714A (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010636825.8A Pending CN112117714A (en) | 2020-07-03 | 2020-07-03 | Cable intermediate joint installation method and expansion device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112117714A (en) |
| WO (1) | WO2022001270A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001270A1 (en) * | 2020-07-03 | 2022-01-06 | 长缆电工科技股份有限公司 | Installation method and expansion device for cable intermediate joint |
| CN114188897A (en) * | 2021-11-25 | 2022-03-15 | 长缆电工科技股份有限公司 | Cable accessory and cable metal sheath processing method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003163038A (en) * | 2001-11-28 | 2003-06-06 | Yazaki Corp | Shield process structure of flat shield cable and its shield process method |
| CN105337137B (en) * | 2014-07-25 | 2018-01-30 | 泰科电子(上海)有限公司 | Expansion tool and the method for connecting the first and second cables |
| CN207069255U (en) * | 2017-07-14 | 2018-03-02 | 长园电力技术有限公司 | A kind of transition joint main body dilating fixture |
| CN207251165U (en) * | 2017-09-11 | 2018-04-17 | 北京市天华伟业线缆有限公司 | Cable connectors |
| CN110890723A (en) * | 2019-12-20 | 2020-03-17 | 江苏远航电缆附件有限公司 | Expansion device for intermediate joint of cable accessory |
| CN112117714A (en) * | 2020-07-03 | 2020-12-22 | 长缆电工科技股份有限公司 | Cable intermediate joint installation method and expansion device |
| CN212366666U (en) * | 2020-07-03 | 2021-01-15 | 长缆电工科技股份有限公司 | Cable intermediate head expansion device |
-
2020
- 2020-07-03 CN CN202010636825.8A patent/CN112117714A/en active Pending
-
2021
- 2021-04-06 WO PCT/CN2021/085526 patent/WO2022001270A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001270A1 (en) * | 2020-07-03 | 2022-01-06 | 长缆电工科技股份有限公司 | Installation method and expansion device for cable intermediate joint |
| CN114188897A (en) * | 2021-11-25 | 2022-03-15 | 长缆电工科技股份有限公司 | Cable accessory and cable metal sheath processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022001270A1 (en) | 2022-01-06 |
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Country or region after: China Address after: 410000 No. 223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha, Hunan Applicant after: Long Cable Technology Group Co.,Ltd. Address before: No.223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha City, Hunan Province, 410205 Applicant before: CHANGLAN CABLE ACCESSORIES Co.,Ltd. Country or region before: China |