CN216082869U

CN216082869U - Test wiring test needle for circuit breaker

Info

Publication number: CN216082869U
Application number: CN202122561222.9U
Authority: CN
Inventors: 徐鑫; 邢小琛; 李晶; 邬世杰; 姜晓颖; 靳凯迪; 姜华; 杜骏
Original assignee: Ulanqab Electric Power Bureau Of Inner Mongolia Power Group Co ltd
Current assignee: Ulanqab Electric Power Bureau Of Inner Mongolia Power Group Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-03-18
Anticipated expiration: 2031-10-25

Abstract

The utility model discloses a test wiring test needle for a circuit breaker, which comprises a needle body and is characterized in that: the contact point needle is arranged at the end part of the needle body and is connected with the needle body through an elastic part, so that the contact point needle can elastically move along the axial direction of the needle body; be provided with along the fixed plate that the needle body can elastic expansion radially at the lateral wall of needle body, through fixed plate with needle body and circuit breaker rigid coupling, its rigid coupling that can be quick, stable is on the contact of circuit breaker to adopt the needle of spring, ensure the connection that the contact point can be stable, last.

Description

Test wiring test needle for circuit breaker

Technical Field

The utility model relates to the field of detection equipment for circuit breaker related tests, in particular to a test needle for a circuit breaker mechanical property test.

Background

The circuit breaker is a switching device capable of closing, carrying and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a specified time, and is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to its use range. The circuit breaker can be used for distributing electric energy and protecting a power supply line, and when the circuit breaker and the power supply line are in an abnormal operation state, a fault line is automatically cut off through the protection device, so that the power supply reliability is ensured.

The function of the cable is very important in a power system, and is a ring which is crucial to ensuring the safety and reliability of the assets of the power system, and very serious consequences can be caused once the cable is damaged; in order to ensure that the circuit breaker can always normally operate and the probability of occurrence of problems is reduced to the minimum, regular tests (tests) need to be carried out on the circuit breaker, and the related tests of the circuit breaker are used for testing each subsystem of a spring mechanism, a hydraulic mechanism, an energy storage mechanism, an anti-tripping mechanism and the like of the circuit breaker, so that the circuit breaker can stably and reliably act, and the circuit breaker can be ensured not to be mistakenly operated and refused to operate in normal operation.

In addition, the circuit breaker is equivalent to the insurance in the power system, and can be triggered to work only when an abnormal (fault) condition occurs, and can be kept idle for a plurality of months or even years under a common condition, so that the circuit breaker can not be triggered, can not work for a long time, can normally work or not, and can be known only through testing.

The test of the circuit breaker mainly comprises the following aspects:

circuit breaker mechanical property testing, which involves repeated opening and closing of the circuit breaker, requires that the circuit breaker must be closed and opened at an appropriate speed and that its assigned work and functions be completed without any fault.

When the action of the circuit breaker is tested, the vibration of the test action of the circuit breaker is large, and a technician must press and hold the test to ensure that the test needle is continuously contacted with the contact;

when the three-phase split circuit breaker is tested, the three mechanism boxes have more lines (at least six groups of measuring points), so that a single person can hardly press the lines on the contacts of the circuit breaker simultaneously, and a plurality of persons are required to cooperate with the circuit breaker simultaneously.

And the three-phase split circuit breaker is also aimed at, if the split phases are controlled together, the test needle which is caused by small space is not well pressed, so that the test needle is in virtual connection with a contact point of a contact of the circuit breaker, the test is unstable, and the problem that the circuit breaker has a problem or the contact of the test needle is poor can not be truly reflected.

Disclosure of Invention

In view of this, the utility model provides a test wiring test pin for a circuit breaker, which can be quickly and stably fixed to a contact of the circuit breaker, and a spring-type pin is adopted to ensure stable and continuous connection of the contact.

In a first aspect, the application provides a test wiring test needle for a circuit breaker, which comprises a needle body;

the contact point needle is arranged at the end part of the needle body and is connected with the needle body through an elastic part, so that the contact point needle can elastically move along the axial direction of the needle body;

the side wall of the needle body is provided with a fixed plate which can elastically expand along the radial direction of the needle body, and the needle body is fixedly connected with the breaker through the fixed plate.

With reference to the first aspect, as a possible implementation structure, when the needle body is disposed, the connection port is configured at the top end of the needle body, the elastic member is disposed in the needle body, the connection port is electrically connected to one end of the elastic member, the other end of the elastic member is connected to the contact pin, and when the elastic member is in a natural state, the elastic pin extends out of the needle body.

The elastic part comprises an outer tube, the outer tube is fixedly connected with the inner wall of the needle body, a spring is arranged in the outer tube, and the contact needle is arranged in the outer tube and is arranged on the spring in an overhead mode, so that elastic connection is formed between the contact needle and the needle body; the outer tube or the spring is made of an electrically conductive metal material, so that an electric current can be transmitted from the connection opening to the contact pin.

The wiring port is electrically connected with the elastic element, and particularly, the wiring port and the elastic element can be connected through a lead.

With reference to the first aspect, as one possible implementation structure, when the needle body is disposed, an inverted V-shaped elastic sheet is disposed in the needle body, fixing columns extending in the radial direction of the needle body are fixed to two end portions of the elastic sheet, the fixing columns penetrate through the needle body, and the fixing plates are connected to free ends of the fixing columns;

the elastic sheet is provided with a pressing column near the bending end, the pressing column penetrates through the needle body, and the free end of the pressing column is provided with a pressing button for extruding the elastic sheet.

In the above structure, the structure of the press button extruding elastic sheet is formed in two types, wherein

The first method is as follows: the compression leg is fixedly connected with the elastic sheet, the elastic sheet is extruded by pressing the compression button, and the fixing plate moves towards the needle body after the elastic sheet is extruded.

The second method is as follows: the compression leg contacts but not fixed with the flexure strip, is provided with the bar logical groove that is used for the compression leg to pass along the axial on the needle body, extrudees the flexure strip through the endwise slip along the needle body, and the flexure strip is extruded the back fixed plate and is removed towards the needle body.

This practicality has the electric wire with the form external world of plug on the wiring mouth when implementing, passes through the wire by the wiring mouth and transmits the electric current to the contact needle on.

With reference to the first aspect, as one possible implementation structure, when the fixing plate is disposed, the fixing plate is an arc-shaped plate surface, and a rubber layer or a pointed portion is disposed on an outer wall of the fixing plate. To increase the friction between the fixed plate and the circuit breaker.

The utility model has the following beneficial effects:

the testing pin can be quickly and stably fixed on a short-circuit device through the arrangement of the elastic sheet, and when the testing pin is fixed, the elastic sheet is extruded firstly, and then the testing pin is inserted into a hole column of a contact bolt of a circuit breaker; after the circuit breaker is fixed, due to the elastic force of the elastic piece, the circuit breaker can be kept without manual continuous maintenance, and therefore, in the actual operation, the circuit breaker can be efficiently tested by a single person.

Secondly, when the action of the circuit breaker is tested, the action of the components in the circuit breaker can enable the circuit breaker to act, and the vibration can cause relative movement between the testing needle and the circuit breaker (because the testing needle and the circuit breaker are only fixed by friction force), so that the movement can cause the problems of virtual connection and poor contact between the contact needle and the contact of the circuit breaker, and great instability can occur during testing; in this regard, in the present application, the contact pin is elastically connected to the pin body, and after the side license is inserted into the hole column of the circuit breaker, the contact pin is compressed by a certain distance; in this state, even after the needle body and the breaker are moved relatively, stable contact is ensured.

Drawings

Fig. 1 is a schematic overall structure diagram of the present application.

FIG. 2 is a schematic view of the connection between the wire connection port and the elastic member (the needle body is axially cut).

Fig. 3 is a schematic structural view of the elastic sheet of the present application.

Fig. 4 is a schematic structural diagram of the elastic member of the present application.

Fig. 5 is a schematic view of the structure of the elastic sheet compressed by pressing the button.

Fig. 6 is a schematic view showing the structure of the elastic sheet compressed by sliding the press button in the application.

In the figure, 1, a needle body; 1.1, a wiring port; 1.2, pressing the column; 1.3, pressing a button; 1.4, fixing columns; 1.5, strip-shaped through grooves; 2. a contact pin; 3. an elastic member; 3.1, an outer tube; 3.2, a spring; 4. and (7) fixing the plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

Firstly, an application scene is introduced, when a circuit breaker is subjected to an inspection test, external current (such as external overload current, short circuit and other means) is needed to test the stability of the circuit breaker during working, and when the circuit breaker is tested, a project is required to be repeatedly carried out for many times so as to ensure that the circuit breaker can normally work, the process needs to manually hold a contact pin 2 (an insulating layer is arranged on the contact pin 2 used at present) to continuously press the contact pin on a wiring end of the circuit breaker (the wiring end is connected with a circuit, so that the contact pin is usually pressed in a hole column for installing a fixing bolt on the wiring end), and for a three-phase circuit breaker, six groups of wiring ends are arranged, so that one person is difficult to operate, multiple persons are required to cooperate, and the difficulty in the operation process is large; in this respect, the present application proposes the following solutions:

as shown in fig. 1, the application provides a test wiring test pin for a circuit breaker, which comprises a pin body 1; the needle body 1 is in a cylindrical tubular structure, an upper end cover is arranged at the upper end of the needle body 1, a through hole is processed at the center of the upper end cover, and a wiring port 1.1 is bonded in the through hole; an elastic part 3 is fixed on the inner wall of the needle body 1 along the axial direction of the needle body 1 at a position close to the lower end in the needle body 1, the elastic part 3 comprises an outer tube 3.1 and a spring 3.2, a compression spring 3.2 (shown in figure 4) is installed in the inner tube, the upper end of the contact needle 2 is positioned in the inner tube and is contacted with the spring 3.2, and the lower end of the contact needle passes through a lower end cover and extends out of the needle body 1; the needle body 1 is made of plastic materials which are not conductive.

As shown in fig. 2, the upper end of the outer tube 3.1 (made of aluminum or iron) is plugged by a copper sheet and the copper sheet is connected with the outer tube 3.1 by soldering, so that the upper end of the spring 3.2 is directly contacted with the copper sheet, and the spring 3.2 is made of a metal conductive material 3.2; the copper sheet is connected with a wiring terminal of the wiring port 1.1 through a copper wire by tin soldering; so that a current path is formed between the connection port 1.1 and the contact pin 2.

When the contact pin 2 is pushed, the contact pin 2 is retracted due to the spring force of the spring 3.2.

As shown in fig. 3, an elastic sheet with an inverted V-shaped structure is arranged in the needle body 1, two end parts of the elastic sheet are close to the lower end of the needle body 1, and fixing columns 1.4 extending in the radial direction of the needle body 1 are fixed (can be fixed in an adhesion manner) at the two end parts of the elastic sheet;

the fixing column 1.4 penetrates through the needle body 1 and extends out of the needle body 1, the fixing plate 4 is connected with the free end of the fixing column 1.4 to form a whole, when the fixing column 1.4 and the fixing column are connected, a threaded hole is machined in the fixing plate 4, an external thread is correspondingly machined in the free end of the fixing column 1.4, and the fixing plate 4 is connected with the fixing column in a threaded mode; and because fixing bolt's hole post is cylindrical structure on the circuit breaker, in order to increase the contact surface between fixed plate 4 and the short circuiter, fixed plate 4 sets up to curved face structure, further in order to increase frictional force between the two, it has the one deck rubber layer to paste at the surface of fixed plate 4, or the even processing of surface at fixed plate 4 has the pointed end, the pointed end can adopt the structural style of "barb" to implement, avoid fixing needle body 1 on the circuit breaker after, needle body 1 slips from the circuit breaker.

The elastic sheet is provided with a pressing column 1.2 (which can be fixed in a bonding mode) at a position close to the bending end, the pressing column 1.2 penetrates through the needle body 1, and a pressing button 1.3 used for extruding the elastic sheet is arranged at the free end of the pressing column 1.2 (which can be installed in a threaded connection mode and specifically refers to the installation mode of the fixing plate 4).

In the structure, the elastic sheet can be compressed by the press button 1.3, and the fixing plate 4 is further moved towards the center of the needle body 1; in the structural form, when the needle body 1 needs to be fixed on the circuit breaker, the fixing plate 4 retracts through the press button 1.3, then the needle body 1 is aligned to a hole column of a fixing bolt of the circuit breaker, the needle body 1 is inserted into the hole column, so that the contact pin 2 is contacted with the fixing bolt, the spring 3.2 is compressed to a certain degree, the press button 1.3 is loosened, the fixing plate 4 can be tightly attached to the inner wall of the hole column due to the elasticity of the elastic sheet, and the needle body 1 can be fixed on the circuit breaker due to the action of friction force; the arrangement of the spring 3.2 realizes the stable contact effect of the contact pin 2 and the wiring end of the circuit breaker.

On the basis of the above structure, the structure of the press button 1.3 extruding the elastic sheet is formed in two types, and the following description is made by two embodiments:

example 1

As shown in fig. 5, on the basis of the above structure, the elastic sheet is compressed mainly by pressing, and the specific structure is as follows: pressing post 1.2 and flexure strip fixed connection, and pressing post 1.2 distributes in the both sides of flexure strip for the distribution of pressing post 1.2 symmetry is on needle body 1, extrudees the flexure strip through pressing two sets of pressure buttons 1.3, and the flexure strip is extruded after-fixing plate 4 and is moved towards needle body 1.

Example 2

As shown in fig. 6, on the basis of the above structure, the compression of the elastic sheet is mainly realized by sliding the press button 1.3, and the specific structure is as follows: the pressing columns 1.2 are in contact with the elastic sheet but not fixed, the pressing columns 1.2 are provided with two groups, the two groups are respectively and symmetrically distributed on two sides of the elastic sheet, strip-shaped through grooves 1.5 for the pressing columns 1.2 to pass through are axially arranged on the needle body 1, the strip-shaped through grooves 1.5 are also symmetrically distributed on two sides of the needle body 1, the elastic sheet is extruded by sliding along the axial direction of the needle body 1 (downwards sliding as shown in figure 5), and the fixing plate 4 moves towards the needle body 1 after the elastic sheet is extruded; when the compression of the elastic sheet needs to be released, the pressing button 1.3 can be slid upwards to release the compression.

The utility model discloses when implementing, there is external electric wire with the grafting on wiring mouth 1.1 now, then fixes needle body 1 on the circuit breaker, and the circuit that forms through external electric wire city provides experimental electric current for the circuit breaker, verifies it when meeting with the problem, and whether the circuit breaker can normally move, because needle body 1 can stably fix on the circuit breaker, this experiment is verified and can single completion to the high efficiency that fixed mode is ten minutes.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a test wiring test needle of circuit breaker, includes needle body (1), its characterized in that:

the contact point needle (2) is arranged at the end part of the needle body (1), and the contact point needle (2) is connected with the needle body (1) through the elastic part (3) so that the contact point needle (2) can elastically move along the axial direction of the needle body (1);

the side wall of the needle body (1) is provided with a fixed plate (4) which can elastically expand along the radial direction of the needle body (1), and the needle body (1) is fixedly connected with the breaker through the fixed plate (4).

2. The circuit breaker testing connection testing pin of claim 1, characterized in that: when setting up above-mentioned needle body (1), constructed wiring mouth (1.1) at the top of needle body (1), elastic component (3) set up in needle body (1), wiring mouth (1.1) and the one end electric connection of elastic component (3), the other end and the contact needle (2) of elastic component (3) are connected, and when elastic component (3) were in natural state, the elastic needle stretched out outside needle body (1).

3. The circuit breaker testing connection testing pin of claim 2, characterized in that: the elastic part (3) comprises an outer tube (3.1), the outer tube (3.1) is fixedly connected with the inner wall of the needle body (1), a spring (3.2) is arranged in the outer tube (3.1), and the contact needle (2) is arranged in the outer tube (3.1) and is arranged on the spring (3.2) in an overhead mode, so that elastic connection is formed between the contact needle (2) and the needle body (1); the outer tube (3.1) or the spring (3.2) is made of an electrically conductive metal material, so that an electric current can be transmitted from the connection opening (1.1) to the contact pin (2).

4. The circuit breaker testing connection testing pin of claim 1, characterized in that: an inverted V-shaped elastic sheet is arranged in the needle body (1), fixing columns (1.4) extending in the radial direction of the needle body (1) are fixed at the two end parts of the elastic sheet, the fixing columns (1.4) penetrate through the needle body (1), and the fixing plates (4) are connected with the free ends of the fixing columns (1.4);

a pressing column (1.2) is arranged on the elastic sheet close to the bending end, the pressing column (1.2) penetrates through the needle body (1), and a pressing button (1.3) for extruding the elastic sheet is arranged at the free end of the pressing column (1.2).

5. The circuit breaker testing connection testing pin of claim 4, wherein: the pressing column (1.2) is fixedly connected with the elastic sheet, the elastic sheet is extruded by pressing the pressing button (1.3), and the fixing plate (4) moves towards the needle body (1) after the elastic sheet is extruded.

6. The circuit breaker testing connection testing pin of claim 4, wherein: the compression leg (1.2) contacts with the elastic sheet, a strip-shaped through groove (1.5) for the compression leg (1.2) to pass through is arranged on the needle body (1) along the axial direction, the elastic sheet is extruded through the axial sliding along the needle body (1), and the elastic sheet is extruded to move towards the needle body (1) by the extrusion rear fixing plate (4).

7. The circuit breaker testing connection testing pin according to any one of claims 1-6, characterized in that: the fixed plate (4) is an arc-shaped plate surface, and a rubber layer or a pointed head part is arranged on the outer wall of the fixed plate (4).