CN107422151B

CN107422151B - Unilateral short circuit has test terminal of preventing maloperation shutting function

Info

Publication number: CN107422151B
Application number: CN201710439771.4A
Authority: CN
Inventors: 陈晓彬; 孙玉彤; 倪苗升; 陈庆鸿; 李海涛
Original assignee: ZHUHAI ELECTRIC POWER DESIGN INSTITUTE CO LTD; Guangdong Power Grid Co Ltd; Jieyang Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: ZHUHAI ELECTRIC POWER DESIGN INSTITUTE CO LTD; Guangdong Power Grid Co Ltd; Jieyang Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2023-03-24
Anticipated expiration: 2037-06-12
Also published as: CN107422151A

Abstract

The invention belongs to the technical field of terminal devices, and particularly relates to a test terminal with a single-side short circuit and an anti-misoperation locking function. Including first termination, second termination, connecting block and insulating casing, first termination passes through the connecting block with the second termination and is connected, and wherein, the connecting block includes even piece and lower piece even, goes up even piece and is close to first termination department and is equipped with "L" type insulation barrier down, and even piece is close to first termination department and is equipped with the bar insulation board down, is equipped with the wiring jack on the first termination. The novel test terminal with the misoperation prevention locking function is simple in structure and convenient to operate, a worker can only insert the test plug into one side of the current transformer, meanwhile, the insulating baffle plate is arranged above the first wiring jack, the test plug can be prevented from being inserted into the first wiring jack in a connecting state of the connecting block, and safety accidents caused by wrong operation sequences are effectively avoided.

Description

Unilateral short circuit has test terminal of preventing maloperation shutting function

Technical Field

The invention belongs to the technical field of terminal devices, and particularly relates to a test terminal with a single-side short circuit and an anti-misoperation locking function.

Background

The switching and connection of the secondary loop cable lines are usually realized by connecting terminals in the interior of a power system relay protection screen, a terminal box or a control collection box and other screens. Part of the terminals are provided with terminal connecting sheets and test wire jacks according to the test requirements, the connecting sheets are used for connecting metal parts at two ends of the terminals, screws are attached above the connecting sheets, the screws are unscrewed, and the connecting sheets can be manually shifted to realize two states of connection and disconnection at two ends of the terminals; the connecting sheet is locked and fixed in the current state by screwing the screw, and the effect of reliable connection or disconnection is achieved. The connecting piece can be pulled to conveniently and reliably realize the connection and disconnection of cables connected with the two ends of the terminal; the test wire jacks are directly connected to the terminal metal sheets, the inner diameters of the test wire jacks are slightly larger than the outer diameter of the test wire plug, and the test wire jacks are arranged on the left side and the right side respectively and used for temporarily, conveniently and reliably inserting and pulling out the test wires during testing.

However, the test terminal in the prior art has a high requirement on professional ability of an operator, and when the test terminal is used, the test terminal must be operated completely according to a specified operation sequence, the steps cannot be reversed, and even misoperation cannot occur; conventional test terminal lacks the mistake function of preventing, can't realize the shutting function of flow operation, relies on staff's subjective control completely, and the error probability is high, and in case the error consequence is serious.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the test terminal with the anti-misoperation locking function in the unilateral short circuit, which has the advantages of simple structure and convenience in operation, and can effectively prevent safety accidents caused by misoperation.

In order to solve the problems, the technical scheme provided by the invention is as follows: the utility model provides a unilateral short circuit has test terminal of preventing maloperation shutting function, includes first termination, second termination, connecting block and insulating casing, first termination passes through the connecting block with second termination and is connected, and first termination, second termination, connecting block are located in the insulating casing, wherein, the connecting block include even piece and lower piece, last even piece be close to first termination department and be equipped with "L" type first insulation baffle down, last even piece be close to second termination department and be equipped with "L" type second insulation baffle down, lower piece be close to first termination department and be equipped with the bar insulation board, first termination on be equipped with the wiring jack.

Furthermore, the first wiring device further comprises a first wire pressing conductor, a first wire pressing screw and a first wire pressing nut, and the second wiring device comprises a second wire pressing conductor, a second wire pressing screw and a second wire pressing nut.

Furthermore, the first wiring jack is arranged on the first line pressing conductor. Only the current transformer side is provided with a test jack, so that the condition that a worker is short-circuited or plugged with a test wire on the non-current transformer side of the test terminal can be avoided.

Furthermore, the first wire pressing screw is arranged on the first wire pressing conductor and far away from the direction of the connecting block, and the first wire pressing screw is matched with the first wire pressing nut; the second wire pressing nut is arranged on the second wire pressing conductor in the direction away from the connecting block, and the second wire pressing screw is matched with the second wire pressing nut. The compression nut is used for compressing the lead connected to the line pressing conductor.

Furthermore, the connecting block further comprises a compression screw, compression nuts are arranged on the upper connecting piece and the lower connecting piece, and the compression screw penetrates through the compression nuts and is matched with the compression nuts. The first wiring device can be connected or disconnected with the second wiring device by screwing or unscrewing the screw.

Furthermore, a sleeve is arranged on the first wiring jack, and a limiting elastic sheet is arranged in the sleeve. Set up spacing shell fragment in the sleeve and can be used to compress tightly experimental plug.

Furthermore, the inverted L-shaped first insulating baffle is positioned right above the first wiring jack sleeve, and the strip-shaped insulating baffle is positioned below the first wiring hole; the inverted L-shaped second insulating baffle (18) is positioned right above the second line pressing screw (12) and the second line pressing nut (13). Set up insulating baffle above first wiring jack and can prevent to insert test plug under the connecting block connected state, first wiring jack sets up the insulating baffle of bar and can stabilize in order to let the connecting block, operates more smoothly.

Furthermore, the inverted L-shaped first insulating baffle is fixedly connected with the upper connecting piece, and the strip-shaped insulating baffle is fixedly connected with the lower connecting piece; and the inverted L-shaped second insulating baffle is fixedly connected with the side of the upper connecting piece, which is close to the second wiring device.

Compared with the prior art, the beneficial effects are: the novel test terminal with the misoperation prevention locking function is simple in structure and convenient to operate, a worker can only insert the test plug into one side of the current transformer, meanwhile, the insulating baffle plate is arranged above the first wiring jack, the test plug can be prevented from being inserted into the first wiring jack in a connecting state of the connecting block, and safety accidents caused by wrong operation sequences are effectively avoided.

Drawings

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

FIG. 2 is a top view of the present invention.

Fig. 3 is a schematic view of the connecting block of the present invention in a connected state.

Fig. 4 is a schematic structural view when the test plug is inserted.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

As shown in fig. 1 and fig. 2, a unilateral short circuit test terminal with anti-misoperation locking function comprises a first wiring device 1, a second wiring device 2, a connecting block 3 and an insulating housing 4, wherein the first wiring device 1 is connected with the second wiring device 2 through the connecting block 3, the first wiring device 1, the second wiring device 2 and the connecting block 3 are arranged in the insulating housing 4, the connecting block 3 comprises an upper connecting piece 15 and a lower connecting piece 16, the upper connecting piece (15) is provided with an inverted L-shaped first insulating baffle 5 near the first wiring device 1, the upper connecting piece 15 is provided with an inverted L-shaped second insulating baffle 18 near the second wiring device 1, the lower connecting piece 16 is provided with a strip-shaped insulating plate 6 near the first wiring device 1, and the first wiring device 1 is provided with a wiring jack.

Specifically, the first wiring device 1 further includes a first press line conductor 7, a first press line screw 9, and a first press line nut 8, and the second wiring device 2 includes a second press line conductor 14, a second press line screw 12, and a second press line nut 13.

Wherein the first wiring jack is provided on the first line voltage conductor 7. Only the current transformer side is provided with a wiring jack, so that the condition that a worker is short-circuited or plugged with a test wire on the non-current transformer side of the test terminal can be avoided.

In addition, a first wire pressing nut 8 is arranged on the first wire pressing conductor 7 and is far away from the connecting block 3, and a first wire pressing screw 9 is matched with the first wire pressing nut 8; the second pressing line nut 13 is arranged on the second pressing line conductor 14 in the direction away from the connecting block 3, and the second pressing line screw 12 is matched with the second pressing line nut 13. The compression nut is used for compressing the lead connected to the line pressing conductor.

The connecting block 3 further comprises a compression screw 17, compression nuts are arranged on the upper connecting piece 15 and the lower connecting piece 16, and the compression screw 17 penetrates through the compression nuts to be matched with the compression nuts. The first wiring device can be connected or disconnected with the second wiring device by screwing or unscrewing the screw.

In addition, a sleeve 10 is arranged on the first wiring jack, and a limiting elastic sheet 11 is arranged in the sleeve 10. A limiting elastic sheet 11 is arranged in the sleeve 10 and can be used for compressing the test plug.

The inverted L-shaped first insulating baffle 5 is positioned right above the first wiring jack sleeve 10, and the strip-shaped insulating baffle 6 is positioned below the first wiring hole; and the inverted L-shaped second insulating baffle (18) is positioned right above the second line pressing screw (12) and the second line pressing nut (13). Set up insulating baffle above first wiring jack and can prevent to insert test plug under the connecting block connected state, first wiring jack sets up bar insulating baffle and can prevent that the mistake from inserting test plug from first wiring jack below.

In addition, the inverted L-shaped first insulating baffle 5 is fixedly connected with the upper connecting piece 15, and the strip-shaped insulating baffle 6 is fixedly connected with the lower connecting piece 16; the inverted L-shaped second insulating baffle 18 is fixedly connected with the upper connecting sheet 15 close to the second wiring device 2.

As shown in fig. 3 and 4, the operation flow and the principle of the anti-misoperation locking function are as follows:

1. according to the test terminal, only the current transformer side is provided with the first wiring jack in the structural design, so that a worker can be effectively prevented from carrying out short circuit or inserting a test wire on the non-current transformer side of the test terminal, the situation that the movable pressing connecting piece is moved to the current transformer side and then the non-current transformer side (interval protection side) is subjected to short circuit according to the working habit after the movable pressing connecting piece is moved to the current transformer side is prevented, and then the test wire is mistakenly inserted into the non-current transformer side, namely the interval protection side according to the working habit to carry out test work such as current and the like is prevented;

2. when the loop is in an operation connection state, current loop wires are connected to the left and the right of the test terminal, the loop is in an electrified operation state, the connecting block capable of being pulled is located on the side of a left current transformer, namely, a connection position, the test jack insulating baffle on the left side of an upper connecting piece capable of being pulled to press the connecting piece tightly seals the wiring jack, the wiring jack on the left side of the terminal cannot be inserted with a test wire, a worker is prevented from directly inserting the connecting piece into the test wire to add test current or inserting a short circuit wire when the connecting piece capable of being pulled to disconnect the loop is not moved to the right, the connecting piece capable of being pulled to be moved to the side of a non-current transformer is prevented from being not moved, and the test wire is directly inserted into the test jack on the side of the current transformer to carry out a current adding test;

3. when the pressing connecting piece can be pulled to move to the non-current transformer side of the test terminal right, namely the test terminal is in an off position state, the upper part and the lower part of the socket of the sleeve on the left side are opened, a test wire or a short-circuit wire plug can be inserted, the pressing connecting piece can be prevented from being moved to the non-current transformer side, and a test wire is directly inserted into a test jack on the current transformer side to carry out a current test;

4. after this test terminal current transformer side wiring jack inserts test wire or short-circuit connection plug or other non-standard test lines, with can stir the wiring jack that compresses tightly the last piece of even piece and be connected by "L" type first insulation baffle and block, simultaneously with can stir the wiring jack bar insulation baffle that compresses tightly even piece and be connected down, can prevent to stir and compress tightly even piece and move left and resume to current transformer side and "connect" position state promptly, just so prevented that the left and right conductible part of test terminal from connecting. The circuit is prevented from being conducted by a test terminal directly without pulling out a test wire or a short-circuit wire plug or other non-standard test wires, and the condition that the test wire at the side of a current transformer which is not pulled out directly restores a connecting sheet to connect the circuit can be prevented;

5. after the test work is finished, the test wire is pulled out to open the upper channel and the lower channel of the test jack, the pressing connecting piece capable of being pulled is moved to the side of the current transformer, the test terminal is restored to the connection position state, and the upper channel and the lower channel of the test jack are locked.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A test terminal with a single-side short circuit and an anti-misoperation locking function comprises a first wiring device (1), a second wiring device (2), a connecting block (3) and an insulating shell (4), wherein the first wiring device (1) is connected with the second wiring device (2) through the connecting block (3), the first wiring device (1), the second wiring device (2) and the connecting block (3) are arranged in the insulating shell (4), the test terminal is characterized in that the connecting block (3) comprises an upper connecting piece (15) and a lower connecting piece (16), an inverted L-shaped first insulating baffle (5) is arranged at the position, close to the first wiring device (1), of the upper connecting piece (15), an inverted L-shaped second insulating baffle (18) is arranged at the position, close to the second wiring device (2), a strip-shaped insulating baffle (6) is arranged at the position, close to the first wiring device (1), of the lower connecting piece (16), and a wiring jack is arranged on the first wiring device (1); the first wiring device (1) further comprises a first wire pressing conductor (7), a first wire pressing screw (9) and a first wire pressing nut (8), and the second wiring device (2) comprises a second wire pressing conductor (14), a second wire pressing screw (12) and a second wire pressing nut (13); the first wiring jack is arranged on the first wire pressing conductor (7); the first wire pressing nut (8) is arranged on the first wire pressing conductor (7) and is far away from the connecting block (3), and the first wire pressing screw (9) is matched with the first wire pressing nut (8); the second wire pressing nut (13) is arranged on the second wire pressing conductor (14) in the direction far away from the connecting block (3), and the second wire pressing screw (12) is matched with the second wire pressing nut (13); the inverted L-shaped first insulating baffle (5) is fixedly connected with the upper connecting piece (15), and the strip-shaped insulating baffle (6) is fixedly connected with the lower connecting piece (16); the inverted L-shaped second insulating baffle (18) is fixedly connected with the side, close to the second wiring device (2), of the upper connecting sheet (15).

2. The test terminal with the single-side short circuit and the anti-misoperation locking function according to claim 1 is characterized in that the connecting block (3) further comprises a compression screw (17), compression nuts are arranged on the upper connecting piece (15) and the lower connecting piece (16), and the compression screw (17) penetrates through the compression nut and is matched with the compression nut.

3. The test terminal with the one-side short circuit and the anti-misoperation locking function according to claim 1 is characterized in that a sleeve (10) is arranged on the first wiring jack, and a limiting elastic sheet (11) is arranged in the sleeve (10).