Installation tool facilitating installation of cable terminal stress cone

Abstract

The utility model provides an installation tool facilitating installation of a cable terminal stress cone. The installation tool comprises a main ring body, a neck bush and a pressure device facilitating the main ring body to push the cable terminal stress cone. The neck bush is detachably connected with the main ring body, the neck bush is provided with an opening matched with a cable terminal stress cone and a through hole for a cable to penetrate through, and the opening is communicated with the through hole; and the pressure device is connected with the main ring body. The installation tool facilitating installation of the cable terminal stress cone can achieve convenient and labor-saving auxiliary installation of the cable terminal stress cone, not only can reduce installation difficulty of the cable terminal stress cone, but also can effectively protect cable insulation and the surface of the stress cone and improve construction quality, thereby guaranteeing follow-up cable construction quality and safe operation.

Description

Technical Field

[0001] This utility model relates to the field of power construction technology, and more specifically, to an installation tool that facilitates the installation of stress cones on cable terminals. Background Technology

[0002] High-voltage cable terminals must meet high requirements both in manufacturing and operation. Due to the complexity of the cable terminal's structure, fabrication, connection, and operating conditions, failures are inevitable, necessitating extremely precise installation. A high-voltage power cable terminal consists of multiple components assembled onto the cable in the field. The most critical component is the installation of the stress cone (hereinafter referred to as the stress cone). The stress cone is the core component of the high-voltage power cable terminal, made of elastic silicone rubber, and its assembly with the cable is an interference fit. This results in high interface pressure and demanding installation techniques. Therefore, the quality of the stress cone installation directly determines the safe and reliable operation of the cable terminal.

[0003] Currently, the installation of stress cones for high-voltage power cable terminals is primarily done manually by forcefully inserting them onto the cable. When manpower is insufficient, a manual hoist and binding straps are used to pull the stress cone downwards into the cable. This near-brute-force installation not only results in long working hours and high labor intensity for construction workers, but also easily causes damage to the stress cone during installation, such as punctures to the cone surface or damage to the rubber stress, thus increasing the risk of single-point breakdown and discharge, causing power failures in the cable lines after they are put into operation. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies in the existing technology and provide an installation tool that facilitates the installation of cable terminal stress cones. This installation tool can help to install cable terminal stress cones conveniently and labor-savingly. It can not only reduce the difficulty of installing cable terminal stress cones, but also effectively protect the cable insulation and the surface of the stress cone, improve the construction quality, and thus ensure the quality of subsequent cable construction and safe operation.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an installation tool for facilitating the installation of a cable terminal stress cone, characterized in that: it includes a main ring body, an inner bushing, and a pressure device for facilitating the main ring body to push the cable terminal stress cone; the inner bushing is detachably connected to the main ring body, and the inner bushing is provided with an opening that matches the cable terminal stress cone and a through hole for cable passage, the opening and the through hole being connected; the pressure device is connected to the main ring body.

[0006] In the above-described solution, when the installation tool of this utility model is inserted into the cable, it can contact the cable terminal stress cone through the matching inner sleeve. The construction worker uses a pressure device to press down the main ring body, thereby pushing the cable terminal stress cone, achieving convenient and labor-saving assistance in installing the cable terminal stress cone on the cable terminal, greatly reducing the difficulty of installing the cable terminal stress cone. Simultaneously, the inner sleeve effectively protects the cable insulation and the surface of the stress cone, improving construction quality and ensuring the subsequent cable construction quality and safe operation. Furthermore, the inner sleeve is detachably connected to the main ring body, facilitating the disassembly and reassembly of the inner sleeve due to wear, or allowing for the replacement of the inner sleeve according to different grades and models of cable terminal stress cones on the market. This improves the versatility and practicality of the installation tool. The size range can be determined based on the maximum diameter of the 110kV~220kV cable terminal stress cone, making it compatible with the installation of any grade and model of cable terminal stress cone on the market.

[0007] The detachable connection between the inner liner and the main ring body means that the inner liner and the main ring body are snap-fitted together to achieve a detachable connection.

[0008] The main ring body has at least one slot inside, and the inner liner has a number of protrusions equal to the number of slots. The inner liner is snapped into the main ring body by engaging the protrusions with the slots.

[0009] The slot is equipped with an elastic positioning element to prevent the inner liner from loosening; when the inner liner is engaged with the main ring body, the elastic positioning element contacts the inner liner. The elastic positioning element of this utility model can ensure that the inner liner can be fixed to the main ring body and will not fall off, ensuring the stability and reliability of the installation tool during construction.

[0010] The main ring body is an openable structure and includes a main body one and a main body two. One end of the main body one is hinged to one end of the main body two, and the other end of the main body one is openable and closed to the other end of the main body two.

[0011] The inner liner includes inner liner one and inner liner two; inner liner one and inner liner two are detachably connected to main body one and main body two, respectively.

[0012] The main ring of this utility model adopts an openable structure, which allows the installation tool to be installed and operated on any section of the cable. Moreover, after the cable terminal stress cone is installed, the main ring can be opened directly to quickly disassemble the installation tool. There is no need to retract the installation tool from the bottom to the top of the cable to retrieve it from the other end, which also reduces the risk of scratching or bumping the cable insulation during the retraction process.

[0013] The phrase "the other end of the main body one and the other end of the main body two can be opened and closed" means that the other end of the main body one and the other end of the main body two are opened and closed by a fastening method.

[0014] Alternatively, the installation tool may also include fasteners, which enable the opening and closing of the other end of the first body and the other end of the second body.

[0015] The pressure device is a pressure lever and / or a tension component; the pressure lever is detachably connected to the main ring body.

[0016] The tensioning component includes tension rings and a hoisting rope / chain hoist. The tension rings are evenly distributed on the outside of the main ring body and are detachably connected to the main ring body. One end of the hoisting rope / chain hoist is detachably connected to the tension rings, and the other end is connected to an external tensioning device.

[0017] This invention utilizes a pressure lever to apply force to the stress cone at the cable terminal, thereby achieving the purpose of pushing the stress cone downwards and advancing it. When it is difficult for construction personnel to install the stress cone on high cables, a hoisting rope / chain hoist can be attached to a tension ring, allowing external tension equipment to replace manual labor in pushing the stress cone and securing it to the cable terminal. Compared to methods that involve binding ropes or slings to the surface of the stress cone, which can easily cause deformation and loss of clamping force, this invention places the main force points on evenly distributed tension rings, effectively preventing the stress cone from deforming and losing its clamping force, thus protecting the stress cone intact after installation.

[0018] Specifically, the pressure handles are evenly distributed on the outer side of the main ring body, or symmetrically distributed on both sides of the main ring body. When the pressure handles are symmetrically distributed on both sides of the main ring body, it conforms to ergonomics, making the posture of the construction personnel more comfortable when pressing from top to bottom, increasing the pushing pressure, and reducing manual labor.

[0019] The installation tool also includes an ejector component for ejecting the inner liner; the ejector component includes an ejector rod, and the main ring body has an ejector hole through which the ejector rod passes to eject the inner liner. When the inner liner is deformed and difficult to remove, the inner liner can be ejected by inserting the ejector rod into the ejector hole, thereby increasing the speed of inner liner replacement or removal and reducing the difficulty of replacing the inner liner.

[0020] The inner sleeve is made of nylon plastic. This invention uses a nylon plastic inner sleeve to ensure uniform stress on the cable terminal stress cone. The radial gap between the cable insulation and the inner sleeve is 3 to 5 millimeters, preventing uneven pressure on both sides from scratching the insulation and effectively eliminating the risk of impact to the cable insulation during pushing. During the pushing process, the uniform stress on the cable terminal stress cone prevents excessive localized stress and damage, thus ensuring the stress cone remains intact after installation.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. This utility model provides an installation tool that facilitates the installation of cable terminal stress cones. It enables convenient and labor-saving assistance in the installation of cable terminal stress cones, not only reducing the difficulty of installation but also effectively protecting the cable insulation and the surface of the stress cone, improving construction quality, and thus ensuring the quality of subsequent cable construction and safe operation.

[0023] 2. The inner bushing of this utility model is detachably connected to the main ring body, which facilitates the disassembly and assembly of the inner bushing due to wear, or allows for the replacement of the inner bushing according to different grades and models of cable terminal stress cones on the market, thereby improving the versatility and practicality of the installation tool.

[0024] 3. The main ring of this utility model adopts an opening and closing structure, which facilitates quick disassembly of the installation tool. It eliminates the need for the installation tool to be retracted from the bottom to the other end of the cable, and also reduces the risk of scratching or bumping the cable insulation during the retraction process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation tool for facilitating the installation of stress cones at cable terminals according to this utility model;

[0026] Figure 2 This is an internal schematic diagram of the installation tool for facilitating the installation of stress cones at cable terminals according to this utility model;

[0027] Figure 3 This is a schematic diagram of the main body of the installation tool of this utility model;

[0028] Figure 4 This is a schematic diagram of the second main body in the installation tool of this utility model;

[0029] Figure 5 This is a schematic diagram of either inner liner one or inner liner two in the installation tool of this utility model;

[0030] Among them, 1 is the main ring body, 1.1 is the slot, 1.2 is the first main body, 1.3 is the second main body, 2 is the inner bushing, 2.1 is the opening, 2.2 is the through hole, 2.3 is the protrusion, 3 is the mounting hole, 4 is the fastener, 5 is the pressure handle, 6 is the tension ring, 7 is the ejector rod, 8 is the ejector hole, and 9 is the rotating shaft. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 1 to 5As shown, the installation tool for facilitating the installation of cable terminal stress cones according to this utility model includes a main ring body 1, an inner bushing 2, and a pressure device for facilitating the main ring body 1 to push the cable terminal stress cone. The inner bushing 2 is detachably connected to the main ring body 1. The inner bushing 2 is provided with an opening 2.1 that matches the cable terminal stress cone and a through hole 2.2 for cable passage. The opening 2.1 and the through hole 2.2 are connected. The pressure device is connected to the main ring body 1.

[0034] Specifically, the detachable connection between the inner sleeve 2 and the main ring body 1 means that the main ring body 1 has at least one slot 1.1 inside, and the inner sleeve 2 has an equal number of protrusions 2.3 to the slot 1.1. The inner sleeve 2 is snapped into the main ring body 1 by engaging the protrusions 2.3 with the slot 1.1. In this embodiment, the inner sleeve 2 and the main ring body 1 are detachably connected by snapping. To ensure that the inner sleeve 2 can be fixed to the main ring body 1 and does not fall off, an elastic positioning element (not shown) is provided in the slot 1.1 to prevent the inner sleeve 2 from loosening. Figure 3 The image shows the mounting hole 3 for the elastic positioning element; when the inner sleeve 2 is engaged with the main ring 1, the elastic positioning element contacts the inner sleeve 2, which ensures the stability and reliability of the installation tool during construction.

[0035] The installation tool in this embodiment also includes a fastener 4. The main ring 1 has an opening and closing structure and includes a first main body 1.2 and a second main body 1.3. One end of the first main body 1.2 and one end of the second main body 1.3 are hinged to each other by a pivot 9. The other end of the first main body 1.2 overlaps with the other end of the second main body 1.3 and is locked in place by the fastener 4 in a threaded manner to achieve closure. Removing the fastener 4 allows for opening. The inner liner includes an inner liner 1 and an inner liner 2, which are detachably connected to the first main body 1.2 and the second main body 1.3, respectively.

[0036] The pressure device in this embodiment consists of a pressure lever 5 and a tensioning component. The pressure lever 5 is detachably connected to the main ring body 1 and symmetrically arranged on both sides of the main ring body 1. During construction, the pressure lever 5 can also be evenly arranged on the outer side of the main ring body 1 according to actual needs. When the pressure lever 5 is symmetrically arranged on both sides of the main ring body 1, it conforms to ergonomics, making the posture of the construction personnel more comfortable when pressing from top to bottom, increasing the pushing pressure, and reducing manual labor. The tensioning component includes a tensioning ring 6 and a hoisting rope / chain hoist. The tensioning ring 6 is evenly arranged on the outer side of the main ring body 1 and detachably connected to the main ring body 1. One end of the hoisting rope / chain hoist is detachably connected to the tensioning ring 6, and the other end is connected to an external tensioning device.

[0037] This invention utilizes the pressure lever 5 to apply force to the stress cone at the cable terminal, thereby achieving the purpose of pushing the stress cone downwards and advancing it. When it is difficult for construction personnel to install the stress cone on high cables, a hoisting rope / chain hoist can be attached to the tension ring 6, and the external tensioning equipment can replace manual labor to push the stress cone, thus completing the installation of the stress cone on the cable terminal. Compared to methods that tie ropes or slings to the surface of the stress cone, which can easily cause deformation and loss of clamping stress, this invention places the main force points on the evenly distributed tension rings 6, effectively preventing the stress cone from deforming and losing its clamping stress, thus protecting the stress cone intact after installation.

[0038] The installation tool of this utility model also includes an ejector component for ejecting the inner liner 2. The ejector component includes an ejector rod 7, and the main ring body 1 has an ejector hole 8. The ejector rod 7 passes through the ejector hole 8 to eject the inner liner 2. When the inner liner 2 is deformed and difficult to remove, the ejector rod 7 can be inserted into the ejector hole 8 to eject the inner liner 2, thereby improving the speed of replacing or removing the inner liner 2 and reducing the difficulty of replacing the inner liner 2.

[0039] The inner sleeve 2 of this invention is made of nylon plastic. The use of nylon plastic for the inner sleeve 2 ensures uniform stress on the cable terminal stress cone. The radial gap between the cable insulation and the inner sleeve is 3 to 5 millimeters, preventing uneven pressure on both sides from scratching the insulation and effectively eliminating the risk of impact to the cable insulation during pushing. During the pushing process, the uniform stress on the cable terminal stress cone prevents excessive localized stress and damage, thus ensuring the stress cone remains intact after installation.

[0040] Example 2

[0041] The only difference between this embodiment and embodiment one is that the main ring body in this embodiment is an integral structure, and the inner bushing is detachably connected to the main ring body, or the inner bushing includes inner bushing one and inner bushing two, and inner bushing one and inner bushing two are detachably connected to the main ring body respectively.

[0042] The other structures in this embodiment are the same as in Embodiment 1.

[0043] Example 3

[0044] The only difference between this embodiment and embodiment one is that: the other end of the main body one and the other end of the main body two are respectively provided with matching fastening parts, and the other end of the main body one and the other end of the main body two are opened and closed by fastening.

[0045] The other structures in this embodiment are the same as in Embodiment 1.

[0046] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An installation tool for facilitating the installation of stress cones on cable terminals, characterized in that: It includes a main ring body, an inner bushing, and a pressure device to facilitate the main ring body's advancement of the cable terminal stress cone; the inner bushing is detachably connected to the main ring body, and the inner bushing is provided with an opening that matches the cable terminal stress cone and a through hole for cable insertion, the opening and the through hole being connected; the pressure device is connected to the main ring body. The main ring body is an openable structure and includes a main body one and a main body two. One end of the main body one is hinged to one end of the main body two, and the other end of the main body one is openable and closedable to the other end of the main body two.

2. The installation tool for facilitating the installation of cable terminal stress cones according to claim 1, characterized in that: The detachable connection between the inner liner and the main ring body means that the inner liner and the main ring body are snap-fitted together to achieve a detachable connection.

3. The installation tool for facilitating the installation of cable terminal stress cones according to claim 2, characterized in that: The main ring body has at least one slot inside, and the inner liner has a number of protrusions equal to the number of slots. The inner liner is snapped into the main ring body by engaging the protrusions with the slots.

4. The installation tool for facilitating the installation of cable terminal stress cones according to claim 3, characterized in that: The slot is provided with an elastic positioning element to prevent the inner liner from loosening; when the inner liner is fastened to the main ring body, the elastic positioning element contacts the inner liner.

5. The installation tool for facilitating the installation of cable terminal stress cones according to claim 1, characterized in that: The inner liner includes inner liner one and inner liner two; inner liner one and inner liner two are detachably connected to main body one and main body two, respectively.

6. The installation tool for facilitating the installation of cable terminal stress cones according to claim 1, characterized in that: The phrase "the other end of the main body one and the other end of the main body two can be opened and closed" means that the other end of the main body one and the other end of the main body two are opened and closed by a fastening method. Alternatively, the installation tool may also include fasteners, which enable the opening and closing of the other end of the first body and the other end of the second body.

7. The installation tool for facilitating the installation of cable termination stress cones according to claim 1, characterized in that: The pressure device is a pressure lever and / or a tension component; the pressure lever is detachably connected to the main ring body. The tensioning component includes tension rings and a hoisting rope / chain hoist. The tension rings are evenly distributed on the outside of the main ring body and are detachably connected to the main ring body. One end of the hoisting rope / chain hoist is detachably connected to the tension rings, and the other end is connected to an external tensioning device.

8. The installation tool for facilitating the installation of cable termination stress cones according to claim 7, characterized in that: The pressure handles are evenly distributed on the outer side of the main ring body, or the pressure handles are symmetrically distributed on both sides of the main ring body.

9. The installation tool for facilitating the installation of cable terminal stress cones according to claim 1, characterized in that: The installation tool also includes an ejector component for ejecting the inner liner; the ejector component includes an ejector rod, and the main ring body has an ejector hole through which the ejector rod passes to eject the inner liner.

10. The installation tool for facilitating the installation of stress cones at cable terminals according to claim 1, characterized in that: The inner liner is made of nylon plastic.

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