CN215728565U

CN215728565U - Touchable terminal cable high-voltage test connecting tool and system

Info

Publication number: CN215728565U
Application number: CN202121291631.5U
Authority: CN
Inventors: 张永龙
Original assignee: CREC EEB Operation Maintenance Co Ltd
Current assignee: CREC EEB Operation Maintenance Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-02-01
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a connecting tool and a system for a high-voltage test of a cable of a touchable terminal, wherein the connecting tool comprises a first plug connector, a second plug connector and a connecting piece, wherein the first plug connector is used for being plugged in one end of a through hole of the cable terminal; the first plug connector comprises a first connecting rod and a test wire fixing structure which is connected to one end of the first connecting rod and used for connecting a test wire; the connecting piece is in threaded connection with the first plug connector and/or the second plug connector. The cable head core connection structure can be quickly connected with a cable core of a cable head, is reliable in connection, does not have the problem of infirm connection or falling off, and improves the safety of tests.

Description

Touchable terminal cable high-voltage test connecting tool and system

Technical Field

The utility model belongs to the technical field of cable high-voltage tests, and particularly relates to a connecting tool and a connecting system for a cable high-voltage test of a touchable terminal.

Background

With the development of the power industry, the enclosed gas high-voltage switch cabinet is widely used in power transformer substations and power distribution substations, and the cable terminals in the cabinet are all touch plug-in cable terminals which have the characteristics of full sealing and full insulation. As shown in fig. 1, the conventional plug-in cable terminal includes a T-shaped head 13, a cable 12 disposed at one end of the T-shaped head 13, and a connecting lug 14 connected to the cable 12, wherein a through hole 11 is disposed in a horizontal section of the T-shaped head 13, and one end of the cable 12 is disposed in the through hole 11. At present, closed gas switch cabinets are adopted in domestic high-speed or intercity railway power systems, indoor front-plug type cable terminals are adopted as high-voltage cable terminals, and conductor parts of cable cores are totally closed and led to the high-voltage equipment cabinet.

Before construction and installation or during cable fault and treatment, high-voltage test needs to be carried out on the cable. Because the nose of the cable core terminal is positioned at the center of the plug and is closely attached to the inner wall of the plug, the wire clamp is difficult to connect with the wire core during high-voltage test. After the common test wire clamps are forcibly connected, potential safety hazards such as weak connection and virtual connection or falling of the wire clamps in the test process exist, the shielding layers inside the cable head boots are scratched, the cable head is directly damaged due to discharge and burning of equipment, the economic loss is caused, and the time and labor are wasted in the wiring process, so that the efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of safety problem and low connection speed caused by infirm virtual connection or falling off of the connection with the plug-in terminal in the existing high-voltage test, the utility model provides a connecting tool and a system for a touch terminal cable high-voltage test, which can be quickly connected with a cable core of a cable head, are reliable in connection, have no problem of infirm virtual connection or falling off of connection, and improve the safety of the test.

The utility model is realized by the following technical scheme:

the utility model provides a touchable terminal cable high-voltage test connecting tool, which comprises a first plug connector, a second plug connector and a connecting piece, wherein the first plug connector is used for being plugged into one end of a through hole of a cable terminal;

the first plug connector comprises a first connecting rod and a test wire fixing structure which is connected to one end of the first connecting rod and used for connecting a test wire;

the connecting piece is in threaded connection with the first plug connector and/or the second plug connector.

This scheme connecting tool's first plug connector, second plug connector insert from the both ends of cable termination head through-hole respectively, through the connecting piece with first plug connector and second plug connector threaded connection, realize being connected of first plug connector, second plug connector and cable, pass through the test wire fixed knot structure and be connected with the conductor end of test instrument, the engaging lug of cable termination head links to each other with the shielding end of test instrument to constitute experimental return circuit. Adopt the device, owing to adopt first plug connector and second plug connector to peg graft in the through-hole, the connecting piece adopts threaded connection with first plug connector and/or second plug connector, can realize the device fast with cable junction, and connect reliably, do not have the jail virtual joint of connection or the problem that drops, improve experimental security.

In one possible design, the second connector includes a second connecting rod and an insulator connected to an end of the second connecting rod.

This scheme sets up the insulating part in the one end of second connecting rod, avoids discharging to closing on the object, improves experimental security.

In one possible design, the diameter of the insulating member gradually increases from the end connected to the second connecting rod to the other end, so that the diameter of the smallest diameter end of the insulating member is smaller than or equal to the diameter of the through hole, and the diameter of the largest diameter end of the insulating member is larger than the diameter of the through hole.

This scheme adopts the insulating part of above-mentioned structure, realizes effectively avoiding discharging close on the object to the shutoff of cable terminal through-hole one end.

In one possible embodiment, the insulating element is screwed to the second connecting rod.

The insulating part is a quick-wear part, and in order to facilitate replacement of the insulating part, the insulating part is in threaded connection with the second connecting rod through threads.

In one possible design, the test wire fixing structure is an alligator clamp or a bolt.

When the test tool is used, the test tool is connected with a test instrument through a test line, an alligator wire clamp or a bolt is adopted, the test line is convenient to connect, and the convenience of operation is improved.

In one possible design, the connecting piece is a stud bolt.

And due to the adoption of a threaded connection mode, the connection reliability is easily influenced by the friction of the connecting rod in the long-term use process. This scheme adopts stud to realize being connected of first plug connector and second plug connector, both is convenient for improve the speed of dismouting, improves the speed of being connected with the cable, also is convenient for change the connecting piece, improves the reliability of connecting.

The utility model provides a touchable terminal cable high-voltage test system, which comprises the first aspect and any one of the touchable terminal cable high-voltage test connecting tools and a test instrument, wherein the test instrument comprises a conductor end and a shielding end, and the conductor end of the test instrument is connected with a test wire fixing structure through a test wire.

The test wire fixing structure is connected with the conductor end of the test instrument through the test wire, and the connecting lug of the cable terminal is connected with the shielding end of the test instrument to form a test loop. By adopting the device, the high-voltage test of the cable can be realized.

In one possible design, the test instrument is a high-voltage test device.

In one possible design, the test instruments are an insulation resistance test device, an alternating current withstand voltage test device, a direct current withstand voltage test device, a leakage current measurement device and a cable fault detection device.

Through the structure, the insulation resistance test, the alternating current withstand voltage test, the direct current withstand voltage test, the leakage current measurement, the cable fault detection and the like of the cable can be realized through the test instrument.

Compared with the prior art, the utility model at least has the following advantages and beneficial effects:

1. according to the testing tool, the first plug connector and the second plug connector are directly plugged in the through hole, and the connecting piece is in threaded connection with the first plug connector and/or the second plug connector, so that the device can be quickly connected with a cable, the connection is reliable, the problem of loose connection or falling of the device due to poor connection is avoided, and the safety of the test is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic view of a conventional cable termination.

Fig. 2 is a schematic view of the first connector.

Fig. 3 is a schematic view of the second connector.

Fig. 4 is a schematic view of the installation structure of the connection tool of the present invention and the cable termination.

Fig. 5 is a schematic diagram of the system of the present invention.

Reference numbers in the figures refer to:

11. a through hole; 12. a cable; 13. a T-shaped head; 14. connecting lugs; 21. a first connecting rod; 22. a test wire fixing structure; 31. a second connecting rod; 32. an insulating member; 4. a connecting member.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the utility model. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 2 to 3, in a first aspect of the present embodiment, a touchable terminal cable high-voltage test connection tool is disclosed, which includes a first connector, a second connector, and a connector 4. The first plug connector and the second plug connector are respectively used for being inserted into the through holes from two ends of the through hole of the cable terminal; the connecting piece 4 is used for connecting the first plug connector and the second plug connector so that the first plug connector and the second plug connector are connected with a cable in the cable terminal.

The first plug connector comprises a first connecting rod 21 and a test wire fixing structure 22 connected to one end of the first connecting rod 21 and used for connecting a test wire.

The connecting piece 4 is in threaded connection with the first plug connector and/or the second plug connector. Specifically, the connecting piece 4 may be a screw, one end of which is directly and fixedly connected with the first plug connector/the second plug connector, a threaded hole is formed in the second plug connector/the first plug connector, and the connecting piece is in threaded connection with the second plug connector/the first plug connector; or the connecting piece 4 adopts a stud bolt, threaded holes are formed in the first connector clip and the second connector clip, and the connecting piece is in threaded connection with the first connector clip and the second connector clip.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

In one possible design, the second connector includes a second connecting rod 31 and an insulator 32 connected to one end of the second connecting rod 31. The diameter of the insulating part 32 gradually increases from the connecting end with the second connecting rod 31 to the diameter of the other end, so that the diameter of the minimum diameter end of the insulating part is smaller than or equal to the diameter of the through hole, and the diameter of the maximum diameter end of the insulating part is larger than the diameter of the through hole, thereby being convenient for plugging the through hole of the cable terminal and plugging the insulating part into the through hole of the cable terminal.

In one possible design, the insulating element 32 is screwed to the second connecting rod 31.

In a possible design, test line fixed knot constructs 22 for crocodile mouth fastener or bolt, and the crocodile mouth fastener can not cause any damage to cable head inner wall insulating layer, and firm in connection, and the test fastener can not loosen and take off in the experimentation, and the test stable performance.

Specifically, as shown in fig. 2, the first connector comprises a first connecting rod 31, an alligator clip and a bolt fixed on the alligator clip, threaded holes are formed in both ends of the first connecting rod 31, the threaded holes in one end are connected with the bolt on the alligator clip, and the threaded holes in the other end are connected with the connecting piece 4. The diameter of the first connecting rod 31 is adapted to the diameter of the cable termination through hole. Before the test, the first connector and the connecting piece 4 can be assembled in advance to form a test clip part. The second plug connector comprises a second connecting rod 31, an insulating piece 32 and a bolt, threaded holes are formed in two ends of the second connecting rod 31, the threaded hole in one end is connected with the insulating piece 32, the threaded hole in one end is connected with the connecting piece, and the diameter of the second connecting rod 31 is smaller than or equal to that of the through hole of the cable terminal. Before the experiment, can be in advance with second connecting rod 31 and insulating part 32 assembly completion, constitute insulating stopper part to improve the installation rate, convenient to carry is difficult for losing.

During the test, as shown in fig. 4, the first plug connector and the second plug connector are directly inserted from two ends of the cable terminal, the connecting piece is aligned with the threaded hole on the second connecting rod, and the connecting piece is connected with the second connecting rod through rotation.

The utility model provides a touchable terminal cable high-voltage test system, which comprises the touchable terminal cable high-voltage test connecting tool and a test instrument, wherein the test instrument comprises a conductor end and a shielding end, and the conductor end of the test instrument is connected with the test wire fixing structure 22 through a test wire. The testing instrument is a high-voltage testing device. The testing instrument is an insulation resistance testing device, an alternating current withstand voltage testing device, a direct current withstand voltage testing device, a leakage current measuring device and a cable fault detecting device.

During the experiment, confirm to be surveyed the cable electroless back, it is unsettled to extract the cable plug, assemble into experimental clamp part and insulating stopper part with the testing tool in advance, with first plug connector, the second plug connector subsection is inserted from cable terminal both ends, align the screw hole on connecting piece and the second connecting rod, it is connected with the second connecting rod to rotate the realization connecting piece, it is inseparable to require to connect, prevent to connect the discharge in test process virtual, be connected the conductor end test line and the crocodile mouth fastener of test instrument, be connected the shielding end test line and the engaging lug of test instrument, confirm that test instrument wiring is correct and connect firm rear and can start the experiment.

The structure of this scheme of adoption, easy operation is swift, and firm in connection has effectually shortened the test wiring time of salvageing in-process, and save time can accomplish test wiring convenient and fast in one minute. The safety performance is high, the breakdown fault of the cable terminal head caused by the fact that the insulating layer of the inner wall of the cable plug is scratched by a test wire clamp or a wire head in the operation process is avoided, and the personal safety and the equipment safety caused by the fact that the test wire which is being pressurized falls off due to the connection of the wire clamp in the test process are solved. The cabinet body is discharged because of insufficient insulation distance when the effectual cabinet is tested in having prevented, and insulating shrinkage sleeve pipe is adopted to test tool connecting rod oversheath, uses insulating stopper and test rod to be connected at the connecting rod other end and has sealed the cable terminal, has improved the security.

The second connecting rod, the first connecting rod and the connecting piece can be made of copper materials, and have strong electric conductivity and 70mm of sectional area²For example, the cable made of cross-linked polyethylene has a resistance value of 0.2 Ω/km after the wire is connected to the tool, and a standard resistance of 0.3 Ω/km for pure wire, so that it is known that the special tool for installing the cable terminal head does not affect any parameter of the cable, and the cable has excellent performance and meets the design specifications.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail with reference to the foregoing examples, it should be understood that: modifications and equivalents of the foregoing embodiments may be made. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A touchable terminal cable high-voltage test connecting tool is characterized by comprising a first plug connector, a second plug connector and a connecting piece (4), wherein the first plug connector is used for being plugged into one end of a through hole of a cable terminal, the second plug connector is used for being plugged into the other end of the through hole of the cable terminal, and the connecting piece is used for connecting the first plug connector and the second plug connector so that the first plug connector and the second plug connector are connected with a cable in the cable terminal;

the first plug connector comprises a first connecting rod (21) and a test wire fixing structure (22) which is connected to one end of the first connecting rod (21) and used for connecting a test wire;

the connecting piece (4) is in threaded connection with the first plug connector and/or the second plug connector.

2. The cable high-voltage test connection tool for the touchable terminal according to claim 1, wherein the second plug connector comprises a second connecting rod (31) and an insulating member (32) connected to one end of the second connecting rod (31).

3. A touchable termination cable high-voltage test connection tool according to claim 2, wherein the diameter of the insulator (32) increases gradually from the end connected to the second connection rod (31) to the other end.

4. A touchable termination cable high-voltage test connection tool according to claim 2, wherein the insulator (32) is screwed to the second connection rod (31).

5. The touchable termination cable high-voltage test connection tool according to claim 1, wherein the test wire fixing structure (22) is an alligator clamp or a bolt.

6. A touchable termination cable high-voltage test connection tool according to claim 1, wherein the connection members (4) are stud bolts.

7. A touchable termination cable high voltage test system, comprising the touchable termination cable high voltage test connection tool of any one of claims 1 to 6 and a test instrument, the test instrument comprising a conductor end and a shield end, the conductor end of the test instrument being connected to the test wire fixing structure (22) by a test wire.

8. The touchable termination cable high voltage testing system according to claim 7, wherein the testing instrument is a high voltage testing device.

9. The system of claim 7, wherein the testing apparatus is selected from the group consisting of insulation resistance testing apparatus, ac voltage withstand testing apparatus, dc voltage withstand testing apparatus, leakage current measuring apparatus, and cable fault detecting apparatus.