On-line detection device for direct current resistance of cable conductor

Abstract

The utility model discloses an on-line detection device for direct current resistance of a cable conductor. The on-line detection device comprises a box body, a bottom plate, a first connecting block, a second connecting block, a potential clamp and a current clamp, openings are formed in the two ends of the box body respectively, the first connecting blocks are arranged in the openings, the second connecting blocks are arranged on the bottom plate, first grooves are formed in the first connecting blocks, and second grooves are formed in the second connecting blocks; the potential clamp and the current clamp are arranged on the box body; the box body is provided with a first movable groove allowing the potential clamp and the current clamp to move. The device has the advantage of being convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical detection equipment, and particularly relates to an on-line detection device for the direct current resistance of a cable conductor. Background Art

[0002] The direct current resistance is a very important index in the cable electrical performance inspection items. Generally, cable conductor detection instruments are placed in the laboratory and are not convenient to move. When testing a cable conductor, one end of the cable conductor needs to be intercepted and taken to the laboratory for testing, which is not only inconvenient but also causes material waste. Because this method requires 1.5×2 meters of cable for each test. For example, for a 240mm2 conductor, each cable needs to be intercepted by 3 meters, resulting in a waste of 6kg of copper. Moreover, the cable conductor becomes loose due to truncation, resulting in poor contact and affecting the accuracy of measurement.

[0003] The Chinese utility model patent with the application number CN200920313790.3 discloses an on-line detection device for the direct current resistance of a cable conductor. It mainly solves the problems in the prior art that when detecting a cable conductor, one end of the cable conductor needs to be intercepted, the operation is inconvenient, it will cause material waste and inconvenience, and the detection results are not accurate enough due to the influence of factors such as air humidity, air temperature, and specimen temperature. The on-line detection device for the direct current resistance of a cable conductor includes a resistance tester and a mobile trolley. The resistance tester is arranged on the mobile trolley. A water tank for accommodating the cable is arranged on the top of the mobile trolley. It also includes a potential clamp and a current clamp for clamping on the cable. The potential clamp and the current clamp are connected to the resistance tester through wires. The utility model has the advantages of being movable at will, convenient to use, reducing waste, and improving the accuracy of the detection structure.

[0004] Although the above patent can solve the cable cutting problem, the overall equipment is still relatively large, and it is not convenient enough when the trolley moves, and there are still certain limitations for detection. Content of the Utility Model

[0005] This part of the content of the present application is used to briefly introduce the concepts, which will be described in detail in the following detailed implementation part. This part of the content of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0006] In order to overcome the deficiencies of the prior art, the utility model provides an on-line detection device for the direct current resistance of a cable conductor.

[0007] To achieve the above object, the utility model adopts the following technical solutions: A device for on-line detection of the DC resistance of a cable conductor, comprising a box body, a bottom plate, a first connecting block, a second connecting block, a potential clamp and a current clamp; openings are respectively provided at both ends of the box body, the first connecting block is arranged in the opening, the second connecting block is arranged on the bottom plate, a first groove body is provided on the first connecting block, and a second groove body is provided on the second connecting block; both the potential clamp and the current clamp are arranged on the box body; a first movable groove for the potential clamp and the current clamp to move is provided on the box body.

[0008] Further, a first convex block is provided on the end face of the box body, a third connecting block is provided on the first connecting block, and a first connecting groove corresponding to the third connecting block is provided at the bottom of the first convex block.

[0009] Further, a fourth movable groove is provided on the side wall of the third connecting block, a fixing block is arranged in the fourth movable groove, a first connecting spring is provided on the fixing block, one end of the first connecting spring is fixedly connected to the inner wall of the fourth movable groove, and a fixing groove corresponding to the fixing block is provided on the side wall of the first connecting groove.

[0010] Further, a push plate is arranged in the fixing groove, a push rod is provided on the push plate, the push rod passes out of the fixing groove, and an end plate is provided at one end of the push rod.

[0011] Further, a second movable groove and a third movable groove are provided on the top of the box body, the second movable groove and the third movable groove are arranged on the side wall of the first movable groove and communicate with the first movable groove, a first movable block is arranged in the second movable groove, a second movable block is arranged in the third movable groove, the potential clamp is arranged on the first movable block, and the current clamp is arranged on the second movable block.

[0012] Further, a first through cavity is provided on the first movable block, an installation block is arranged in the first through cavity, the installation block is of a cylindrical structure, an installation cavity is provided on the installation block, and the potential clamp is arranged in the installation cavity.

[0013] Further, a first sliding block and a second sliding block are provided on the side wall of the first movable block, a first sliding groove matched with the first sliding block is provided on the side wall of the first movable groove, and a second sliding groove matched with the second sliding block is provided on the inner wall of the second movable groove.

[0014] Further, a second convex block is provided on the side wall of the installation block, a fifth movable groove and an annular groove for the second convex block to move are provided on the inner wall of the first through cavity, the annular groove is arranged at the top of the fifth movable groove; a second through cavity is provided on the second sliding block, a limiting rod is arranged in the second through cavity, and the limiting rod passes through the annular groove.

[0015] Further, a first installation groove is provided on the inner wall of the first groove body, a first sealing ring is arranged in the first installation groove, a second installation groove is provided on the inner wall of the second groove body, a second sealing ring is arranged in the second installation groove, and both the first sealing ring and the second sealing ring are of a hollow structure.

[0016] Further, a fourth connecting block is provided on the bottom plate, a second connecting groove corresponding to the fourth connecting block is provided at the bottom of the second connecting block, an inserting block is provided at the top of the second connecting block, a slot corresponding to the inserting block is provided at the bottom of the first connecting block, a first air delivery cavity communicating with the slot and the first sealing ring is provided on the first connecting block, a second air delivery cavity communicating with the second sealing ring is provided on the second connecting block, a third air delivery cavity is provided on the inserting block, and a fourth air delivery cavity communicating with the second air delivery cavity and the third air delivery cavity is provided on the fourth connecting block.

[0017] The beneficial effect of the present utility model is to provide an on-line detection device for the DC resistance of cable conductors that is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic embodiments of the drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0019] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the elements and components are not necessarily drawn to scale.

[0020] In the drawings:

[0021] Figure 1 is a schematic structural diagram of an on-line detection device for the DC resistance of cable conductors in an embodiment of the present utility model.

[0022] Figure 2 is Figure 1 a cross-sectional view of the first convex block of the on-line detection device for the DC resistance of cable conductors in the shown embodiment.

[0023] Figure 3 is Figure 2 an enlarged view of part A in

[0024] Figure 4 is Figure 1 a cross-sectional view of the first movable block of the on-line detection device for the DC resistance of cable conductors in the shown embodiment Figure 1 .

[0025] Figure 5 is Figure 4 an enlarged view of part B in

[0026] Figure 6 is Figure 1 a cross-sectional view of the first movable block of the on-line detection device for the DC resistance of cable conductors in the shown embodiment Figure 2 .

[0027] Figure 7 is Figure 6 an enlarged view of part C in

[0028] Figure 8 The Figure 1 cross-sectional view of the second connection block of the on-line detection device for the DC resistance of the cable conductor in the illustrated embodiment.

[0029] Figure 9 The Figure 8 enlarged view at D in

[0030] Figure 10 The Figure 1 cross-sectional view of the third bump of the on-line detection device for the DC resistance of the cable conductor in the illustrated embodiment.

[0031] Figure 11 The Figure 10 enlarged view at E in

[0032] The meanings of the reference numerals in the figure are as follows:

[0033] 101, box body; 101a, first movable groove; 102, bottom plate; 103, first connection block; 104, second connection block; 105, potential clamp; 106, current clamp; 107, first bump; 108, airbag; 109, third connection block; 110, fixed block; 1101, first connection spring; 111, push plate; 1111, push rod; 1112, end plate; 112, first movable block; 1121, first slider; 1122, fifth movable groove; 1123, annular groove; 1124, second slider; 113, mounting block; 1131, second bump; 114, limiting rod; 1141, third slider; 1141, return spring; 115, second air delivery cavity; 116, first sealing ring; 117, second sealing ring; 118, insertion block; 119, first air delivery cavity; 120, fourth connection block; 1201, fourth air delivery cavity; 121, third bump; 123, fourth bump; 124, buckle; 125, air outlet cavity; 126, third air delivery cavity. Detailed implementation manners

[0034] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0035] In addition, it should be noted that, for the sake of convenience of description, only the parts related to the relevant utility model are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0036] It should be noted that concepts such as "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.

[0037] It should be noted that the modifications of "one" and "multiple" mentioned in this disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0038] The names of the messages or information exchanged between multiple devices in the embodiments of this disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0039] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0040] As Figure 1-11 shown, an on-line detection device for the DC resistance of a cable conductor includes a box body 101, a bottom plate 102, a first connection block 103, a second connection block 104, a potential clamp 105 and a current clamp 106; openings are respectively provided at both ends of the box body 101, the first connection block 103 is arranged in the opening, the second connection block 104 is arranged on the bottom plate 102, a first groove is provided on the first connection block 103, and a second groove is provided on the second connection block 104; both the potential clamp 105 and the current clamp 106 are arranged on the box body 101; a first movable groove 101a for the potential clamp 105 and the current clamp 106 to move is provided on the box body 101.

[0041] A first convex block 107 is provided on the end face of the box body 101, a third connection block 109 is provided on the first connection block 103, and a first connection groove corresponding to the third connection block 109 is provided at the bottom of the first convex block 107; a fourth movable groove is provided on the side wall of the third connection block 109, a fixing block 110 is arranged in the fourth movable groove, a first connection spring 1101 is provided on the fixing block 110, one end of the first connection spring 1101 is fixedly connected to the inner wall of the fourth movable groove, and a fixing groove corresponding to the fixing block 110 is provided on the side wall of the first connection groove; an inclined groove is provided on the fixing block 110; a push plate 111 is arranged in the fixing groove, a push rod 1111 is provided on the push plate 111, the push rod 1111 passes through the fixing groove, and an end plate 1112 is provided at the end of the push rod 1111 outside the fixing groove.

[0042] A second movable groove and a third movable groove are provided on the top of the box body 101, the second movable groove and the third movable groove are arranged on the side wall of the first movable groove 101a and communicate with the first movable groove 101a, a first movable block 112 is arranged in the second movable groove, a second movable block is arranged in the third movable groove, the potential clamp 105 is arranged on the first movable block 112, and the current clamp 106 is arranged on the second movable block.

[0043] A first through cavity is provided on the first movable block 112. An installation block 113 is provided in the first through cavity. The installation block 113 is of a cylindrical structure. An installation cavity is provided on the installation block 113. The potential fixture 105 is provided in the installation cavity.

[0044] A first sliding block 1121 and a second sliding block 1124 are provided on the side wall of the first movable block 112. A first sliding groove matching with the first sliding block 1121 is provided on the side wall of the first movable groove 101a. A second sliding groove matching with the second sliding block 1124 is provided on the inner wall of the second movable groove.

[0045] A second convex block 1131 is provided on the side wall of the installation block 113. The second convex block 1131 is of an arc-shaped structure. A fifth movable groove 1122 and an annular groove 1123 for the second convex block 1131 to move are provided on the inner wall of the first through cavity. The fifth movable groove 1122 extends along the length direction of the first through cavity. The annular groove 1123 is provided at the top of the fifth movable groove 1122. A second through cavity is provided on the second sliding block 1124. A limiting rod 114 is provided in the second through cavity. The limiting rod 114 passes through the annular groove 1123. A third sliding block 1141 is provided on the limiting rod 114. A third sliding groove for the third sliding block 1141 to move is provided on the inner wall of the second through cavity. A return spring 1141 is provided on the third sliding block 1141. The return spring 1141 abuts against the end face of the third sliding groove.

[0046] The structure of the second movable block is the same as that of the first movable block 112.

[0047] Furthermore, a first installation groove is provided on the inner wall of the first groove body. A first sealing ring 116 is provided in the first installation groove. A second installation groove is provided on the inner wall of the second groove body. A second sealing ring 117 is provided in the second installation groove. Both the first sealing ring 116 and the second sealing ring 117 are of a hollow structure.

[0048] A fourth connection block 120 is provided on the bottom plate 102. A second connection groove corresponding to the fourth connection block 120 is provided at the bottom of the second connection block 104. An insertion block 118 is provided at the top of the second connection block 104. A slot corresponding to the insertion block 118 is provided at the bottom of the first connection block 103. A first air delivery cavity 119 communicating the slot and the first sealing ring 116 is provided on the first connection block 103. A second air delivery cavity 115 communicating with the second sealing ring 117 is provided on the second connection block 104. A third air delivery cavity 126 is provided on the insertion block 118. A fourth air delivery cavity 1201 communicating with the second air delivery cavity 115 and the third air delivery cavity 126 is provided on the fourth connection block 120.

[0049] At the bottom of the bottom plate 102, there is an airbag 108 communicating with the fourth air delivery cavity 1201. When the airbag 108 is squeezed, air can be injected into the fourth air delivery cavity 1201, and then the first sealing ring 116 and the second sealing ring 117 are inflated; on the side wall of the bottom plate 102, there is a third convex block 121, on the side wall of the box body 101, there is a fourth convex block 123, and a buckle 124 is rotatably connected to the third convex block 121; on the third convex block 121, there is an air outlet cavity 125 communicating with the fourth air delivery cavity 1201, and the air outlet of the air outlet cavity 125 is arranged at the top of the third convex block 121.

[0050] The first connecting block 103 and the second connecting block 104 can be replaced according to the diameter of the cable to be measured, so that the first groove body and the second groove body can fit against the side wall of the cable.

[0051] When using this device, first buckle the box body 101 on the cable, the cable abuts against the first groove body, then align the bottom plate 102 with the box body 101 for installation, so that the cable is located in the first groove body and the second groove body, turn up the buckle 124 to fix the third convex block 121 and the fourth convex block 123 together, the bottom plate 102 is fixed at the bottom of the box body 101, the fourth convex block 123 closes the outlet of the air outlet cavity 125, squeeze the airbag 108 to inject air into the first sealing ring 116 and the second sealing ring 117, and the first sealing ring 116 and the second sealing ring 117 wrap around the side wall of the cable to close the gap between the first groove body and the second groove body; rotate the potential clamp 105 and the current clamp 106, the potential clamp 105 and the current clamp 106 drive the mounting block 113 to rotate, when the mounting block 113 rotates, the second convex block 1131 is staggered from the limiting rod 114, after the second convex block 1131 rotates to the top of the fifth movable groove 1122, push the first movable block 112 and the second movable block into the first movable groove 101a, after the potential clamp 105 and the current clamp 106 move to the preset position, push down the mounting block 113 to clamp the potential clamp 105 and the current clamp 106 on the cable, inject deionized water into the box body 101 through the first movable groove 101a, connect wires to the potential clamp 105 and the current clamp 106, so that the potential clamp 105 and the current clamp 106 are connected to a portable resistance tester to test the cable.

[0052] By setting the structure of the second convex block 1131 and the limiting rod 114 on the side wall of the mounting block 113, the potential clamp 105 and the current clamp 106 are stored on the side wall of the box body 101 when not in use, avoiding the potential clamp 105 and the current clamp 106 from hindering the operation of fixing the box body 101 on the cable.

[0053] There is a drain port on the bottom plate 102, and a valve is arranged in the drain port. The drain port is used to drain the water in the box body 101 after the cable test.

[0054] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above utility model concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the embodiments of the present disclosure.

Claims

1. An online detection device for DC resistance of a cable conductor, characterized in that: It includes a box body, a bottom plate, a first connecting block, a second connecting block, a potential clamp and a current clamp; openings are respectively provided at both ends of the box body, the first connecting block is arranged in the opening, the second connecting block is arranged on the bottom plate, a first slot body is provided on the first connecting block, and a second slot body is provided on the second connecting block; the potential clamp and the current clamp are both arranged on the box body; a first movable slot for the potential clamp and the current clamp to move is provided on the box body.

2. The on-line detection device for DC resistance of cable conductor according to claim 1, characterized in that: A first protrusion is disposed on the end surface of the box body, a third connection block is disposed on the first connection block, and a first connection groove corresponding to the third connection block is disposed at the bottom of the first protrusion.

3. The on-line detection device for DC resistance of cable conductor according to claim 2, characterized in that: A fourth movable groove is provided on the side wall of the third connecting block, a fixed block is provided in the fourth movable groove, a first connecting spring is provided on the fixed block, one end of the first connecting spring is fixedly connected to the inner wall of the fourth movable groove, and a fixing groove corresponding to the fixed block is provided on the side wall of the first connecting groove.

4. The on-line detection device for DC resistance of cable conductor according to claim 3, characterized in that: A push plate is arranged in the fixing groove, a push rod is arranged on the push plate, the push rod passes through the fixing groove, and an end plate is arranged at one end of the push rod.

5. The on-line detection device for DC resistance of cable conductor according to claim 1, characterized in that: A second movable groove and a third movable groove are provided on the top of the box body, the second movable groove and the third movable groove are provided on the side walls of the first movable groove and are communicated with the first movable groove, a first movable block is provided in the second movable groove, a second movable block is provided in the third movable groove, the potential clamp is provided on the first movable block, and the current clamp is provided on the second movable block.

6. The on-line detection device for DC resistance of cable conductor according to claim 5, characterized in that: The first movable block is provided with a first through cavity, a mounting block is provided in the first through cavity, the mounting block is a cylindrical structure, a mounting cavity is provided on the mounting block, and the potential clamp is provided in the mounting cavity.

7. The on-line detection device for the DC resistance of a cable conductor according to claim 6, characterized in that: A first sliding block and a second sliding block are provided on the side wall of the first movable block, a first sliding groove matched with the first sliding block is provided on the side wall of the first movable groove, and a second sliding groove matched with the second sliding block is provided on the inner wall of the second movable groove.

8. The on-line detection device for the DC resistance of a cable conductor according to claim 7, characterized in that: A second protrusion is provided on the side wall of the mounting block, and a fifth movable groove and an annular groove for the second protrusion to move are provided on the inner wall of the first through cavity, and the annular groove is provided at the top of the fifth movable groove; a second through cavity is provided on the second sliding block, and a limiting rod is provided in the second through cavity, and the limiting rod is passed through the annular groove.

9. The on-line detection device for DC resistance of cable conductor according to claim 1, characterized in that: A first installation groove is provided on the inner wall of the first groove body, a first sealing ring is provided in the first installation groove, a second installation groove is provided on the inner wall of the second groove body, a second sealing ring is provided in the second installation groove, and both the first sealing ring and the second sealing ring are hollow structures.

10. The on-line detection device for the DC resistance of a cable conductor according to claim 9, characterized in that: A fourth connecting block is provided on the bottom plate, a second connecting groove corresponding to the fourth connecting block is provided at the bottom of the second connecting block, an insert block is provided on the top of the second connecting block, a slot corresponding to the insert block is provided at the bottom of the first connecting block, a first air delivery cavity communicating with the slot and the first sealing ring is provided on the first connecting block, a second air delivery cavity communicating with the second sealing ring is provided on the second connecting block, a third air delivery cavity is provided on the insert block, and a fourth air delivery cavity communicating with the second air delivery cavity and the third air delivery cavity is provided on the fourth connecting block.

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