Resistance measuring instrument for lightning protection detection

Abstract

The utility model discloses a lightning protection detection resistance measuring instrument, which comprises a box body, a resistance testing instrument body is fixedly connected inside the box body, the front end of the resistance testing instrument body is fixedly connected with a connecting piece through a lead, and a copper matching block is fixedly connected in the middle inside the connecting piece. And movable cavities are formed in the two sides of the connecting piece correspondingly, two springs B are connected to the interiors of the movable cavities, and one ends of the springs B are connected with inserting plates. One end of the whole clamping head can be clamped on the surface of a metal plate piece or a metal cylinder piece, the inner surface of the clamping block makes contact with the surface of the metal plate piece or the metal cylinder piece, and the stretching elastic force of the two springs A in the fixing cavity has the transverse pushing effect on the whole clamping block; therefore, the inner surface of the whole clamping block is more tightly contacted with the surface of the metal plate piece or the metal cylinder piece, and the phenomenon of poor contact between the whole clamping head and the surface of the metal plate piece or the metal cylinder piece is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance measuring instruments, in particular to a resistance measuring instrument for lightning protection detection. Background Art

[0002] There are many types of resistance testers. Resistance testers are indispensable tools for electrical safety inspections and completion acceptance of grounding projects.

[0003] However, when measuring some smooth metal surfaces, the existing resistance measuring instrument has poor fixation of the wires on the resistance measuring instrument, resulting in poor contact when the wires come into contact with the smooth metal surface, affecting the inaccurate measurement data and the unstable current during measurement. Therefore, in order to solve this problem, we propose a resistance measuring instrument with lightning protection detection. Utility Model Content

[0004] The purpose of the present utility model is to provide a resistance measuring instrument for lightning protection detection, so as to solve the problem that the resistance measuring instrument proposed in the above background technology has poor fixation of the wire on the resistance measuring instrument when measuring some smooth metal surfaces, resulting in poor contact when the wire contacts the smooth metal surface, affecting the measurement data. Inaccurate and unstable current during measurement.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a resistance measuring instrument for lightning protection detection, comprising a box body, the interior of which is fixedly connected to a resistance test instrument body, the front end of the resistance test instrument body being fixedly connected to a connector via a wire, a copper matching block being fixedly connected to the middle of the connector, active cavities being provided inside both sides of the connector, two springs B being connected inside the active cavity, and one end of the spring B being connected to a plug board.

[0006] Preferably, one end of the connector is clamped with a clamping part A, one end of the clamping part A is fixedly connected to a clamping joint, a copper connecting block A is fixedly connected between the clamping joint and the clamping part A, and one end face of the copper connecting block A is in contact with the copper matching block inside the connector.

[0007] Preferably, the card joint includes a card joint shell, a fixed cavity is provided inside the card joint shell, two springs A are connected to both sides of the internal end surface of the fixed cavity, one end of the spring A is connected to a card joint block, and the internal end surface of the card joint block is in contact with the copper block A.

[0008] Preferably, one end of the connector is clamped with a clamping piece B, one end of the clamping piece B is fixedly connected to a suction cup, and the middle of the inside of the clamping piece B is fixedly connected to a copper connecting block B.

[0009] Preferably, one end of the copper connecting block B is connected to a copper spring, and one end of the copper spring is connected to a copper stop block.

[0010] Preferably, the other end of the copper connecting block B contacts the copper matching block inside the connector.

[0011] Preferably, both sides of the inside of the clamping member A and the clamping member B are provided with a clamping cavity, and the plug-in board is inserted into the clamping cavity.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model uses the copper spring to contract due to compression deformation, and the extension of the copper spring exerts an outward pushing force on the copper block. This pushing force makes the outer end surface of the copper block closely contact with the outer surface of the metal, thereby avoiding the phenomenon of poor contact between the copper block and the metal surface.

[0014] 2. In the present invention, one end of the integral clamping joint can be clamped onto the surface of a metal plate or a metal cylindrical part, and the inner surface of the clamping block contacts the surface of the metal plate or the metal cylindrical part. The tensioning elastic force of the two springs A inside the fixed cavity has a lateral pushing effect on the integral clamping block. This effect makes the inner surface of the integral clamping block more closely contact with the surface of the metal plate or the metal cylindrical part, thereby avoiding the phenomenon of poor contact between the integral clamping joint and the surface of the metal plate or the metal cylindrical part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A magnified view of the three-dimensional structure at point A in the middle;

[0017] Figure 3 For this utility model Figure 2 A top-down cutaway view of the three-dimensional structure;

[0018] Figure 4 A three-dimensional diagram of the connection between the suction cup, the clamping member B and the connecting member of the present invention;

[0019] Figure 5 For this utility model Figure 4 Top view cutaway view of the three-dimensional structure.

[0020] In the figure: 1. Resistance test instrument body; 2. Box; 3. Connector; 4. Card connector; 401. Card connector housing; 402. Spring A; 403. Fixed cavity; 404. Card block; 5. Card connector A; 6. Card connector cavity; 7. Movable cavity; 8. Press column; 9. Suction cup; 10. Copper connecting block A; 11. Copper matching block; 12. Spring B; 13. Plug-in board; 14. Card connector B; 15. Copper connecting block B; 16. Copper spring; 17. Copper abutment block. DETAILED DESCRIPTION

[0021] 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 the embodiments.

[0022] See also Figures 1 to 5 The utility model provides an embodiment of a resistance measuring instrument for lightning protection detection, comprising a box 2, a resistance test instrument body 1 fixedly connected to the interior of the box 2, a connector 3 fixedly connected to the front end of the resistance test instrument body 1 via a wire, a copper matching block 11 fixedly connected to the middle of the connector 3, active cavities 7 are provided on both sides of the connector 3, two springs B12 are connected to the interior of the active cavity 7, and one end of the spring B12 is connected to a plug board 13;

[0023] One end of the connector 3 is clamped with a clamping part A5, one end of the clamping part A5 is fixedly connected to a clamping joint 4, and a copper connecting block A10 is fixedly connected between the clamping joint 4 and the clamping part A5, and one end face of the copper connecting block A10 is in contact with the copper matching block 11 inside the connector 3.

[0024] The clamping joint 4 includes a clamping joint shell 401, and a fixed cavity 403 is provided inside the clamping joint shell 401. Two springs A402 are connected to both sides of the internal end surface of the fixed cavity 403, and one end of the spring A402 is connected to a clamping block 404. The internal end surface of the clamping block 404 contacts the copper block A10, wherein one end of the integral clamping joint 4 can be clamped on the surface of a metal plate or a metal cylindrical part, and the inner surface of the clamping block 404 contacts the surface of the metal plate or the metal cylindrical part. The stretching elastic force of the two springs A402 inside the fixed cavity 403 has a lateral pushing effect on the integral clamping block 404, which makes the inner surface of the integral clamping block 404 more closely contact with the surface of the metal plate or the metal cylindrical part, thereby avoiding the phenomenon of poor contact between the integral clamping joint 4 and the surface of the metal plate or the metal cylindrical part;

[0025] One end of the connector 3 is clamped with a clamping piece B14, and one end of the clamping piece B14 is fixedly connected to a suction cup 9. The suction force of the suction cup 9 fixes the wire to the smooth metal surface, thereby enabling the overall resistance measuring instrument to measure the resistance of the smooth metal surface. A copper connecting block B15 is fixedly connected to the middle of the clamping piece B14. One end of the copper connecting block B15 is connected to a copper spring 16, and one end of the copper spring 16 is connected to a copper stop block 17. The other end of the copper connecting block B15 is in contact with the copper matching block 11 inside the connector 3.

[0026] When the suction cup 9 is fixed on a smooth metal surface, the copper spring 16 is squeezed and deformed, causing it to contract. The elastic force of the copper spring 16 exerts an outward force on the copper block 17. This force causes the outer end surface of the copper block 17 to come into close contact with the outer surface of the metal, thereby preventing poor contact between the copper block 17 and the metal surface.

[0027] The clamping parts A5 and B14 are provided with a clamping cavity 6 on both sides thereof. The plug-in board 13 is inserted into the clamping cavity 6. One end of the connector 3 can be clamped to the clamping part A5 or the clamping part B14. When measuring the resistance value of a metal plate or a metal cylindrical part, one end of the connector 3 can be clamped to the clamping part A5. When measuring the resistance value of a smooth metal part, one end of the connector 3 can be clamped to the clamping part B14 for measurement.

[0028] When replacing the connector at one end of the connector 3, the user needs to press the pressing posts 8 on both sides of the connector 3, so that the pressing posts 8 move laterally toward the inside of the active cavity 7 and the clamping cavity 6, thereby causing the pressing posts 8 to squeeze the elastic force of the two springs B12. During the squeezing process, the pressing posts 8 drive the plug-in plate 13 at one end to move laterally toward the inside of the active cavity 7 and the clamping cavity 6, thereby releasing the plug-in plate 13 from the inside of the clamping cavity 6, and finally separating the connector 3 from the entire clamping member A5;

[0029] Then, the plug-in plate 13 at one end of the pressing column 8 is inserted into the clamping cavity 6 on the side of the clamping part B14. The tension of the two springs B12 inside the movable cavity 7 has a greater pushing effect on the plug-in plate 13, so that the plug-in plate 13 is clamped in the clamping cavity 6 inside the clamping part B14. The above operation realizes the disassembly and replacement between the clamping part A5 and the clamping part B14.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A resistance measuring instrument for lightning protection detection, comprising a box (2), characterized in that: The resistance test instrument body (1) is fixedly connected to the interior of the box (2); the front end of the resistance test instrument body (1) is fixedly connected to a connector (3) via a wire; a copper matching block (11) is fixedly connected to the middle of the connector (3); movable cavities (7) are provided inside both sides of the connector (3); two springs B (12) are connected inside the movable cavity (7); and one end of the spring B (12) is connected to a plug board (13).

2. The resistance measuring instrument for lightning protection detection according to claim 1, characterized in that: One end of the connector (3) is clamped with a clamping member A (5), one end of the clamping member A (5) is fixedly connected to a clamping joint (4), a copper connecting block A (10) is fixedly connected between the clamping joint (4) and the clamping member A (5), and one end surface of the copper connecting block A (10) is in contact with a copper matching block (11) inside the connector (3).

3. The resistance measuring instrument for lightning protection detection according to claim 2, characterized in that: The card connector (4) comprises a card connector housing (401), a fixed cavity (403) is provided inside the card connector housing (401), two springs A (402) are connected to both sides of the inner end surface of the fixed cavity (403), one end of the spring A (402) is connected to a card connector block (404), and the inner end surface of the card connector block (404) is in contact with the copper connector block A (10).

4. The resistance measuring instrument for lightning protection detection according to claim 2, characterized in that: One end of the connecting piece (3) is clamped with a clamping piece B (14), one end of the clamping piece B (14) is fixedly connected with a suction cup (9), and the middle of the inside of the clamping piece B (14) is fixedly connected with a copper connecting block B (15).

5. The resistance measuring instrument for lightning protection detection according to claim 4, characterized in that: One end of the copper connecting block B (15) is connected to a copper spring (16), and one end of the copper spring (16) is connected to a copper stop block (17).

6. The resistance measuring instrument for lightning protection detection according to claim 5, characterized in that: The other end of the copper connecting block B (15) contacts the copper matching block (11) inside the connector (3).

7. The resistance measuring instrument for lightning protection detection according to claim 4, characterized in that: Both sides of the interior of the clamping member A (5) and the clamping member B (14) are provided with a clamping cavity (6), and the plug-in board (13) is inserted into the clamping cavity (6).

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