Wiring terminal for VD4 vacuum circuit breaker test
By designing a test terminal for VD4 vacuum circuit breaker, the problems of contact instability and circuit breaker damage caused by vibration during the test are solved, and the stability of the test process and data accuracy are achieved.
Patent Information
- Application Number
- CN202421478279.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the VD4 vacuum circuit breaker test, the existing technology caused the clamp or needle to loosen due to vibration and other factors, resulting in poor test and abnormal data, and the crocodile wire clip will damage the circuit breaker's moving contacts.
A VD4 vacuum circuit breaker test terminal is designed, including a conductive rod, a contact connecting piece and a compression nut. Through the coordination of the limit structure and the compression nut, the contact connecting piece is ensured to be in close contact with the moving contact, and a stable connection is achieved through the insulating sleeve and the test wire wiring hole.
The wiring terminals can maintain stable contact during the test, prevent unreliable contact caused by vibration, and avoid damage to the circuit breaker's moving contacts, ensuring the stability of the test process and the accuracy of data.
Smart Images
Figure CN222775217U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of VD4 vacuum circuit breaker testing, in particular to a wiring terminal for VD4 vacuum circuit breaker testing. Background Art
[0002] At present, 10kV VD4 vacuum circuit breakers are widely used in power distribution systems. When vacuum circuit breakers are overhauled, they are tested according to preventive test procedures. At present, when conducting tests on mechanical characteristics of circuit breakers, the contact between the test line and the moving contact of the circuit breaker is connected to the moving contact of the circuit breaker by an alligator wire clamp, and the needle of the multimeter used to measure the circuit breaker loop resistance is inserted inside the moving contact. The above methods will cause the wire clamp or the needle to loosen due to factors such as vibration during the test, which will cause the test to be unsmooth and the data to be abnormal. The long-term use of alligator wire clamps during the test will also cause damage to the moving contact of the vacuum circuit breaker. At present, there is no wire clamp that can ensure reliable contact with the vacuum circuit breaker without damaging the moving contact of the circuit breaker. Utility Model Content
[0003] The purpose of the utility model is to provide a VD4 vacuum circuit breaker test wiring terminal for the problems existing in the prior art, which can ensure close contact with the moving contact of the VD4 vacuum circuit breaker and is easy to install.
[0004] The technical solution adopted by the utility model is as follows: a VD4 vacuum circuit breaker test terminal, which is used to contact the moving contact of the VD4 vacuum circuit breaker, and the terminal comprises a conductive rod, a contact connecting piece and a clamping nut; the end of the conductive rod comprises a limiting structure, and the contact connecting piece has a conductive material and is arranged on the conductive rod; the clamping nut clamps and fixes the contact connecting piece between the clamping nut and the protrusion structure, so that the contact connecting piece is raised and has an expansion force; an insulating sleeve is arranged from the end tail of the conductive rod to the surface of the clamping nut, and a test line wiring hole is arranged at the end tail.
[0005] As a preferred solution, the limiting structure is a mushroom head-shaped structure.
[0006] As a preferred solution, after the wiring terminal contacts the moving contact of the VD4 vacuum circuit breaker, the contact connecting piece contacts closely with the inner surface of the moving contact.
[0007] As a preferred solution, the surface of the conductive rod is provided with threads, and the clamping nut is connected to the conductive rod through the threads and is pressed against the connecting piece.
[0008] As a preferred solution, the contact connecting piece is in an annular structure and is nested on the conductive rod.
[0009] As a preferred solution, strip holes are provided at intervals in the middle of the contact connecting piece along the axis of the conductive rod, and the remaining part forms a spring sheet, which is protruded after being tightened by the limiting structure and the clamping nut, and the protrusion is in close contact with the inner surface of the moving contact.
[0010] As a preferred solution, the conductive rod is provided with a blind hole of a certain depth from the end toward the inside to form the test line connection hole.
[0011] As a preferred solution, the diameter of the test line connection hole is equivalent to that of the test line to ensure reliable connection.
[0012] As a preferred solution, the outer diameter of the protruding spring piece in the contact connecting piece is larger than the outer diameter of the clamping nut.
[0013] As a preferred solution, the insulating sleeve is installed in a detachable manner.
[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model can make the wiring faster and more efficient during the 10kV VD4 vacuum circuit breaker test wiring, and can be in close contact with the circuit breaker moving contact during the test process, effectively preventing unreliable contact caused by test vibration. In the circuit breaker loop resistance test, it effectively solves the problem that the voltage line can only be replaced by the multimeter needle instead of the test line, and avoids the situation where the crocodile wire clip damages the VD4 vacuum circuit breaker moving contact. Therefore, when the utility model is used in the 10kV VD4 vacuum circuit breaker test, it can ensure the stability of the test process and the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The utility model is a schematic diagram of the structure of the VD4 vacuum circuit breaker test terminal.
[0016] Figure 2 The utility model provides a schematic diagram of the use of the VD4 vacuum circuit breaker test terminal.
[0017] Reference numerals: 1-contact connecting piece, 2-circuit breaker moving contact, 3-pressing nut, 4-conductive rod, 5-insulating sleeve, 6-test line connection hole DETAILED DESCRIPTION
[0018] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limitations on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.
[0019] In order to solve the problem that the wire clamp or the meter needle will loosen due to vibration and other factors during the test, which will cause the test to be unsmooth and the data to be abnormal, and the long-term use of the crocodile wire clamp during the test will also cause damage to the moving contact of the vacuum circuit breaker. The embodiment of the utility model proposes a VD4 vacuum circuit breaker test terminal, which is mainly used to contact the moving contact of the VD4 vacuum circuit breaker.
[0020] Please refer to Figure 1 The terminal comprises a conductive rod 4, a contact connecting piece 1 and a clamping nut 3; the end of the conductive rod 4 comprises a limiting structure, and the contact connecting piece 1 is arranged on the conductive rod 4; the clamping nut 3 clamps and fixes the contact connecting piece 1 between the clamping nut 3 and the protruding structure, so that the contact connecting piece 1 is raised and has an expansion force; an insulating sleeve 5 is arranged from the end of the conductive rod 4 to the surface of the clamping nut 3, and a test line wiring hole 6 is arranged at the end.
[0021] In one embodiment, the limiting structure at the end of the conductive rod 4 is a mushroom head-shaped structure.
[0022] In this embodiment, after the terminal contacts the moving contact 2 of the VD4 vacuum circuit breaker, the contact connecting piece 1 is in close contact with the inner surface of the moving contact. The contact connecting piece 1 provided not only plays the role of conducting current, but also ensures that the terminal is in close contact with the moving contact, while being easy to install and remove. In one embodiment, the contact connecting piece 1 is made of conductive material and has an annular structure, and is nested on the conductive rod 4. Strip holes are provided at intervals in the middle of the contact connecting piece 1 along the axis of the conductive rod 4, and the remaining part forms a spring sheet, which is protruded after being pressed by the limiting structure and the clamping nut 3, and the protrusion is in close contact with the inner surface of the moving contact.
[0023] Furthermore, threads are provided on the surface of the conductive rod 4, and the clamping nut 3 is connected to the conductive rod 4 through threads, which can ensure stable clamping of the contact connecting piece 1 so that it maintains a certain expansion force.
[0024] In this embodiment, the conductive rod 4 is provided with a blind hole of a certain depth from the end to the inside, forming the test line connection hole 6. The diameter of the test line connection hole 6 is equivalent to the test line, ensuring reliable connection. The test line connection hole 6 can effectively solve the problem that the voltage line can only be replaced by the multimeter needle instead of the test line during the circuit breaker circuit resistance test, and can be reliably connected with the ordinary test line and conduct the current from the test line to the wiring terminal.
[0025] It should be noted that in order to ensure stable contact between the terminal and the vacuum circuit breaker, the outer diameter of the protruding spring piece in the contact connecting piece 1 in this embodiment should be larger than the outer diameter of the clamping nut 3 and be compressed after being inserted into the moving contact.
[0026] To ensure safety, in this embodiment, an insulating sleeve 5 is provided on the surface from the end of the conductive rod 4 to the clamping nut 3. The wiring sleeve is installed in a detachable manner to play an insulating protection role.
[0027] Please refer to Figure 2 , shows the use of the terminal block proposed by the utility model. The terminal block is inserted into the moving contact 2 of the VD4 vacuum circuit breaker. The contact connecting piece 1 can be deformed to generate a suitable expansion force to ensure close contact with the moving contact 2 of the vacuum circuit breaker, while facilitating the disassembly and assembly of the terminal block. During the test, the test line is connected to the test line connection hole 6 on the terminal block, and the test current flows from the test line to the conductive rod 4 of the terminal block, and then the current is conducted to the terminal contact connecting piece 1, and finally the current is conducted to the circuit breaker through the contact connecting piece 1 of the terminal block and the moving contact 2 of the vacuum circuit breaker.
[0028] The wiring terminal proposed by the utility model can be used for faster and more efficient wiring during the 10kV VD4 vacuum circuit breaker test wiring, and can be in close contact with the circuit breaker moving contact during the test process, effectively preventing unreliable contact caused by test vibration. In the circuit breaker loop resistance test, it effectively solves the problem that the voltage line can only be replaced by the multimeter needle instead of the test line, and avoids the situation where the crocodile wire clip damages the VD4 vacuum circuit breaker moving contact. Therefore, when using the 10kV VD4 vacuum circuit breaker test, the wiring terminal proposed by the utility model can ensure the stability of the test process and the accuracy of the test data.
[0029] Example 1
[0030] This embodiment proposes a VD4 vacuum circuit breaker test terminal, which is used to contact the moving contact of the VD4 vacuum circuit breaker, and the terminal includes a conductive rod, a contact connecting piece and a clamping nut; the end of the conductive rod includes a limiting structure, and the contact connecting piece has a conductive material and is arranged on the conductive rod; the clamping nut clamps and fixes the contact connecting piece between the clamping nut and the protrusion structure, so that the contact connecting piece is raised and has an expansion force; an insulating sleeve is arranged on the surface from the end of the conductive rod to the clamping nut, and a test wire wiring hole is arranged at the end.
[0031] Example 2
[0032] On the basis of Example 1, the limiting structure in this embodiment is a mushroom head-shaped structure.
[0033] Example 3
[0034] On the basis of Example 2, in this embodiment, after the connection terminal contacts the moving contact of the VD4 vacuum circuit breaker, the contact connecting piece contacts closely with the inner surface of the moving contact.
[0035] Example 4
[0036] On the basis of Example 3, in this embodiment, threads are arranged on the surface of the conductive rod, and the clamping nut is connected to the conductive rod through threads and is clamped to contact the connecting piece.
[0037] Example 5
[0038] On the basis of Embodiment 4, in this embodiment, the contact connecting piece is in an annular structure and is nested on the conductive rod.
[0039] Example 6
[0040] On the basis of Example 5, in this embodiment, strip holes are arranged at intervals in the middle of the contact connecting piece along the axis of the conductive rod, and the remaining part forms a spring sheet, which is protruded after being tightened by the limiting structure and the clamping nut, and the protrusion is in close contact with the inner surface of the moving contact.
[0041] Example 7
[0042] On the basis of Example 6, in this embodiment, a blind hole of a certain depth is opened from the end of the conductive rod toward the inside to form the test line connection hole.
[0043] Example 8
[0044] On the basis of Example 7, the diameter of the test line connection hole in this embodiment is equivalent to that of the test line to ensure reliable connection.
[0045] Example 9
[0046] On the basis of Embodiment 8, in this embodiment, the outer diameter of the protruding spring piece in the contact connecting piece is larger than the outer diameter of the clamping nut.
[0047] Example 10
[0048] On the basis of Example 9, the insulating sleeve in this embodiment is installed in a detachable manner.
[0049] The present utility model can be better realized through Examples 1 to 10.
[0050] It should be noted that in the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. The components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0051] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A VD4 vacuum circuit breaker test terminal, characterized in that: Used to contact with the moving contact of the VD4 vacuum circuit breaker, the terminal comprises a conductive rod, a contact connecting piece and a clamping nut; the end of the conductive rod comprises a limiting structure, the contact connecting piece has a conductive material and is arranged on the conductive rod; the clamping nut clamps and fixes the contact connecting piece between the clamping nut and the protrusion structure, so that the contact connecting piece is raised and has an expansion force; an insulating sleeve is arranged on the surface from the end of the conductive rod to the clamping nut, and a test line wiring hole is arranged at the end.
2. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: The limiting structure is a mushroom head-shaped structure.
3. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: After the wiring terminal contacts the moving contact of the VD4 vacuum circuit breaker, the contact connecting piece contacts closely with the inner surface of the moving contact.
4. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: The surface of the conductive rod is provided with threads, and the clamping nut is connected to the conductive rod through the threads and is clamped to contact the connecting piece.
5. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: The contact connecting piece is in an annular structure and is nested on the conductive rod.
6. The VD4 vacuum circuit breaker test terminal according to claim 5, characterized in that: The middle part of the contact connecting piece is provided with strip-shaped holes at intervals along the axis of the conductive rod, and the remaining part forms a spring sheet. The spring sheet is protruded after being pressed by the limiting structure and the clamping nut, and the protrusion is in close contact with the inner surface of the moving contact.
7. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: The conductive rod is provided with a blind hole of a certain depth from the end toward the inside to form the test line connection hole.
8. The VD4 vacuum circuit breaker test terminal according to claim 1 or 7, characterized in that: The diameter of the test line connection hole is equivalent to that of the test line to ensure reliable connection.
9. The VD4 vacuum circuit breaker test terminal according to claim 6, characterized in that: The outer diameter of the protruding spring piece in the contact connecting piece is larger than the outer diameter of the clamping nut.
10. The VD4 vacuum circuit breaker test terminal according to claim 1, characterized in that: The insulating sleeve is installed in a detachable manner.