Plug-in tool for loop resistance test

Abstract

The utility model discloses a plug-in tool for loop resistance testing, which comprises a handle main body, a plug-in arm and a conducting bar which are mutually combined to play a role, the plug-in tool main body is formed by casting a nylon insulating material and is high in strength, and the maximum outer diameter of the whole plug-in arm and the conducting bar is kept consistent with the inner cavity of a tulip contact. Tightness is consistent, obvious errors are avoided, the conducting bar and the plum blossom contact finger on the contact are convenient to fully attach and mesh, handle bodies in various shapes are designed in a personalized mode, the tool can be conveniently and rapidly inserted into the plum blossom contact and rotated, connection holes are formed in connection ports in the two sides of the conducting bar, and detection equipment terminals can be conveniently connected and fastened.

Description

Technical Field

[0001] The utility model relates to the field of testing plug-in tools, in particular to a plug-in tool for loop resistance testing. Background Art

[0002] The level of loop resistance can directly reflect the contact conditions between the conductors inside the switch device. If the loop resistance of the equipment is too high, it will lead to increased energy consumption and excessive temperature rise in the conductive circuit, which can easily cause damage to the equipment or lines, and lead to large-scale power outages.

[0003] Therefore, during the production, inspection, installation, maintenance and overhaul of the switch, it is necessary to test its loop resistance.

[0004] The current trolley switch loop resistance test wire clamp is relatively thick and can only be clamped on the trolley switch plum blossom contact finger part. The clamping degree is difficult to judge, and the tightness between the trolley switch plum blossom contact finger and the trolley switch conductive tube is different, resulting in a large error between each measured value and the actual resistance value. The average value of multiple measurements also has an obvious error from the actual resistance value.

[0005] For example, a Chinese patent with publication number CN207502610U discloses a switch cabinet plum blossom contact finger resistance detection device, which involves the field of power equipment maintenance and detection, including a moving contact, the moving contact is provided with a connecting rod, the front end of the connecting rod is provided with a core rod, the front end of the core rod is provided with a limit part, and the rear end is provided with an insulating sleeve, and the insulating sleeve is provided with a plurality of mutually independent arc-shaped conductive springs in an annular shape, and the plurality of arc-shaped springs form a cavity with a hemispherical front end, and each spring is connected to an ammeter separately. The utility model measures the contact resistance of the contact fingers in different directions simultaneously by using a plurality of springs, which effectively solves the problem of low measurement efficiency in the prior art.

[0006] In summary, the existing loop resistance test tooling has many disadvantages, which are summarized as follows:

[0007] ① The current trolley switch circuit resistance test wire clamp is relatively thick and can only be clamped on the plum blossom contact finger part of the trolley switch, and the clamping degree is difficult to judge;

[0008] ② The tightness between the plum blossom contact finger of the trolley switch and the conductive tube of the trolley switch is different, resulting in a large error between each measured value and the actual resistance value, and the average value of multiple measurements also has an obvious error from the actual resistance value. Utility Model Content

[0009] In view of the deficiencies in the prior art, the utility model provides a plug-in tool for loop resistance testing to solve the above problems.

[0010] In order to achieve the above objectives, the utility model is implemented through the following technical solutions.

[0011] A plug-in tool for loop resistance testing comprises a handle body, a plug-in arm and a conductive bar, wherein the handle body is connected to one end of the plug-in arm, and the conductive bar is arranged at the other end of the plug-in arm. The plug-in arm is a cylinder and has planes adapted to the conductive bar on both sides. The conductive bar is U-shaped and has connecting holes on both sides. The plug-in tool body is die-casted from nylon insulating material and has high strength. The maximum outer diameter of the plug-in arm and the conductive bar as a whole is consistent with the inner cavity of the plum blossom contact, and the tightness is consistent to avoid the occurrence of obvious errors, so that the conductive bar and the plum blossom contact fingers on the contact are fully and tightly engaged. The handle body is personalized in various shapes to facilitate the rapid insertion of the tool into the plum blossom contact and rotation. The access ports on both sides of the conductive bar are provided with connecting holes to facilitate the access and tightening of the terminals of the detection equipment.

[0012] Preferably, the handle body is annular.

[0013] Preferably, the handle body is rectangular.

[0014] Preferably, the handle body is square.

[0015] Preferably, the handle body is triangular.

[0016] Preferably, the handle body is trapezoidal.

[0017] Preferably, the plug arm body is made of nylon insulating material.

[0018] Preferably, the conductive bar is bolted to the plug-in arm.

[0019] Preferably, the conductive bar is connected to the plug-in arm by nested bolts.

[0020] Preferably, the conductive row and the connecting end of the plug arm are flush with each other.

[0021] Compared with the prior art, the utility model discloses a plug-in tool for loop resistance testing, comprising a handle body, a plug-in arm, and a conductive bar, which are used in combination with each other to play a role.

[0022] ①The main body of the plug-in tooling is die-casted with nylon insulating material, which has high strength;

[0023] ② The maximum outer diameter of the plug arm and the conductive bar as a whole is consistent with the inner cavity of the plum blossom contact, and the tightness is consistent to avoid obvious errors, so that the conductive bar and the plum blossom contact fingers on the contact are fully and tightly engaged;

[0024] ③ Personalized design of various shapes of handle bodies to facilitate quick insertion of tooling into the plum blossom contact and rotation;

[0025] ④Connection holes are provided at the access ports on both sides of the conductive bar to facilitate the access and tightening of the detection equipment terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the plug-in tooling for loop resistance testing of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the plug-in tooling for loop resistance testing of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the plug-in tooling for loop resistance testing of the utility model;

[0029] Figure 4 The utility model is a schematic diagram of the structure and operation of the plug-in tooling for loop resistance testing. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] A plug-in tool for loop resistance testing, comprising a handle body 1, a plug-in arm 2, and a conductive bar 3, wherein the handle body 1 is connected to one end of the plug-in arm 2, and the conductive bar 3 is arranged at the other end of the plug-in arm 2, the plug-in arm 2 is a cylinder, and planes adapted to the conductive bar 3 are provided on both sides, the conductive bar 3 is U-shaped, and connecting holes 31 are provided on both sides, the handle body 1 is annular, the plug-in arm 2 body is made of nylon insulating material, the conductive bar 3 is bolted to the plug-in arm 2, the conductive bar 3 is nestedly bolted to the plug-in arm 2, and the planes of the conductive bar 3 and the connecting end of the plug-in arm 2 are flush.

[0032] The meshing part is cylindrical, which can be quickly and accurately meshed with the plum blossom contact fingers of the contact, which is convenient for the trolley switch loop resistance test, reduces the trolley switch loop resistance test error, and improves the loop resistance measurement efficiency. In addition, after the conductive bus 3 is assembled and fixed with the insulating plug arm 2, the resistance value is relatively small and the impact can be ignored. The maximum outer diameter of the plug arm 2 together with the conductive bus 3 is consistent with the inner cavity of the plum blossom contact, which facilitates the conductive bus 3 to be fully and tightly meshed with the plum blossom contact fingers on the contact. The handle body 1 can be designed into various shapes according to personalized needs, which is convenient for quickly inserting the tooling into the plum blossom contact and rotating it. The access ports on both sides of the conductive bus 3 are provided with connection holes 31, which are convenient for the terminals of the detection equipment to be connected and tightened.

[0033] Example 2

[0034] According to the above-mentioned other technical features, the handle body 1 can also be rectangular.

[0035] Example 3

[0036] Under the condition that the other technical features mentioned above remain unchanged, the handle body 1 can also be square.

[0037] Example 4

[0038] While other technical features mentioned above remain unchanged, the handle body 1 may also be triangular in shape.

[0039] Example 5

[0040] Under the condition that the other technical features mentioned above remain unchanged, the handle body 1 can also be trapezoidal.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plug-in tool for loop resistance testing, characterized in that: The invention comprises a handle body (1), a plug arm (2), and a conductive bar (3); the handle body (1) is connected to one end of the plug arm (2); the conductive bar (3) is arranged at the other end of the plug arm (2); the plug arm (2) is a cylinder, and planes adapted to the conductive bar (3) are arranged on both sides; the conductive bar (3) is U-shaped, and connection holes (31) are arranged on both sides.

2. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The handle body (1) is in the shape of a circular ring.

3. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The handle body (1) is rectangular.

4. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The handle body (1) is square.

5. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The handle body (1) is triangular in shape.

6. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The handle body (1) is trapezoidal in shape.

7. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The main body of the plug-in arm (2) is made of nylon insulating material.

8. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The conductive bar (3) is bolted to the plug-in arm (2).

9. The plug-in tool for loop resistance testing according to claim 8, characterized in that: The conductive bar (3) is connected to the plug-in arm (2) by means of nested bolts.

10. The plug-in tool for loop resistance testing according to claim 1, characterized in that: The planes of the conductive bar (3) and the connecting end of the plug arm (2) are flush.

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