Quick clamping device for testing shielding volume resistivity of cable conductor

Abstract

The utility model belongs to the technical field of cable testing, and discloses a rapid clamping device for testing shielding volume resistivity of a cable conductor. The device comprises a first insulating part, an electrode group and a second insulating part, the electrode group is arranged between the second insulating part and the first insulating part, the second insulating part and the first insulating part are adjustably arranged along a preset second axis distance, and the second insulating part can simultaneously press a sample to be tested on an electric connection surface of the electrode group. Through the device, the to-be-tested sample and the test electrode can be conveniently pressed and connected, and the step of manually coating a silver electrode on the to-be-tested sample is avoided, so that reliable and long-acting electric connection between the test electrode and the to-be-tested sample is ensured, the preparation steps are simplified, the difficulty of the test process is reduced, and the test efficiency is improved. The accuracy and efficiency of a test result are improved, and the rapid clamping device for testing the shielding volume resistivity of the cable conductor can be suitable for samples with different thicknesses and is beneficial to realizing batch detection.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to a quick clamping device for testing the volume resistivity of a cable conductor shield. Background Art

[0002] The cable conductor shield mitigates electric field concentration within the cable and improves the distribution of electric field stress on the inner and outer surfaces of the insulation layer. Volume resistivity is a key indicator for evaluating this performance. A shield with low resistivity more effectively and evenly distributes the electric field, thereby improving the cable's electrical strength and service life. Furthermore, resistivity directly influences the shield's protective effect on the insulation layer. An appropriate resistivity effectively prevents partial discharge and charge accumulation, reduces the risk of insulation aging and breakdown, and thus enhances cable safety and reliability.

[0003] In the existing testing process, first, four silver electrodes, including two potential electrodes and two current electrodes, need to be manually coated on the surface of the cable shielding layer. This process is relatively complicated, not only time-consuming, but also requires high manual skills, so it is often prone to problems of inaccurate production. Then, multiple groups of electrode heads are fixed and clamped one by one with screws to ensure good contact between the electrode heads and the silver electrodes. Only after the above preparatory steps are completed can the test be carried out, and during the test process, it must be ensured that the electrical connection between the test equipment and the cable sample is stable to avoid affecting the accuracy of the test results. This results in the existing testing process being complicated, with low reliability, and high technical requirements for testers, making this method unfavorable for batch testing and difficult to meet efficient and accurate testing needs.

[0004] Based on the above, there is an urgent need for a quick clamping device for testing the volume resistivity of cable conductor shielding to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a quick clamping device for testing the volume resistivity of a cable conductor shield, which can simplify the existing testing process and reduce the technical requirements for testers.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Quick clamping device for testing the volume resistivity of cable conductor shields, including:

[0008] a first insulating member;

[0009] an electrode group, the electrode group comprising at least four test electrodes, the at least four test electrodes being arranged in an interval along a preset first axis and mounted on the first insulating member, the test electrodes having an electrical connection surface at one end away from the first insulating member, the electrical connection surface being capable of supporting a sample to be tested;

[0010] A second insulating member, the electrode group is arranged between the second insulating member and the first insulating member, and the distance between the second insulating member and the first insulating member is adjustable along a preset second axis. The second insulating member can simultaneously press the sample to be tested against the electrical connection surfaces of at least four test electrodes, and the preset second axis is perpendicular to the preset first axis.

[0011] Preferably, the quick clamping device for testing the volume resistivity of the cable conductor shield further comprises a locking assembly, the locking assembly comprising a connecting piece and a locking piece, the locking piece having a locking hole, the connecting piece being passed through the locking hole, and the locking piece being adjustably fixed along the position of the connecting piece.

[0012] One end of the connecting member is fixedly connected to the first insulating member, and the locking member is fixedly installed on the second insulating member, so that the distance between the second insulating member and the first insulating member can be adjusted.

[0013] Preferably, the connecting member is a steel wire rope, and the locking member is a wire locker.

[0014] Preferably, the quick clamping device for testing the volume resistivity of the cable conductor shield further comprises a guide assembly, and the guide assembly is used to guide the second insulating member to approach and move away from the first insulating member along the preset second axis.

[0015] Preferably, the guide assembly includes at least three guide rods, one end of each guide rod is fixedly mounted on the first insulating member, an axial direction of each guide rod is parallel to the preset second axis, and each guide rod is slidably disposed in the second insulating member.

[0016] Preferably, the first insulating member and the second insulating member are both plates, and the first insulating member and the second insulating member are arranged in parallel, the preset first axis is parallel to the first insulating member, and the preset second axis is perpendicular to the first insulating member.

[0017] The first insulating member has four apex portions, each of which is equipped with the guide rod and the steel wire rope, and the second insulating member is equipped with four corresponding wire lockers.

[0018] Preferably, the electrode group further includes an electrode base, the test electrode is detachably mounted on the electrode base, and the electrode base is detachably mounted on the first insulating member.

[0019] Preferably, the first insulating member is provided with a snap seat, and the electrode base is provided with a snap connector, and the snap connector is detachably connected to the snap seat.

[0020] Preferably, the first insulating member is provided with a first positioning member, and the electrode base is provided with a second positioning member. The first positioning member and the second positioning member can be inserted and matched in a limited position so that the electrode base can be installed in a limited position on the first insulating member.

[0021] Preferably, the test electrode includes an electrode holder and an electrode test head, one end of the electrode holder is mounted on the electrode base, the other end of the electrode holder is mounted with the electrode test head, and the electrical connection surface is provided at one end of the electrode test head away from the electrode base.

[0022] The beneficial effects of the quick clamping device for testing the volume resistivity of cable conductor shielding provided by the utility model are as follows: through the quick clamping device for testing the volume resistivity of cable conductor shielding, the sample to be tested and the test electrode can be conveniently pressed and connected, and the step of manually coating the silver electrode on the sample to be tested is avoided, which not only ensures a reliable and long-lasting electrical connection between the test electrode and the sample to be tested, but also simplifies the preparation steps, reduces the difficulty of the testing process, improves the accuracy and efficiency of the test results, and enables the quick clamping device for testing the volume resistivity of cable conductor shielding to be applicable to samples of different thicknesses, which is conducive to batch testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of the quick clamping device for testing the volume resistivity of cable conductor shielding provided by the utility model before clamping;

[0024] Figure 2 This is a front view of the quick clamping device for testing the volume resistivity of cable conductor shielding provided by the utility model when clamping;

[0025] Figure 3 This is a side view of the quick clamping device for testing the volume resistivity of cable conductor shielding provided by the utility model when clamping;

[0026] Figure 4 This is a three-dimensional diagram of the electrode group in the quick clamping device for testing the volume resistivity of the cable conductor shield provided by the utility model;

[0027] Figure 5 This is an exploded view of the electrode group in the quick clamping device for testing the volume resistivity of the cable conductor shield provided by the utility model;

[0028] Figure 6 This is an assembly diagram of the first insulating component in the quick clamping device for testing the volume resistivity of cable conductor shielding provided by the utility model.

[0029] In the picture:

[0030] 1. First insulating member; 11. Snap-fit ​​seat; 12. First positioning member; 2. Second insulating member; 3. Sample to be tested; 4. Electrode group; 41. Test electrode; 411. Electrode test head; 412. Electrode bracket; 42. Electrode base; 43. Snap-fit ​​connector; 44. Second positioning member; 5. Connector; 6. Locking member; 7. Guide rod. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] The following is based on the attached Figure 1 To the attached Figure 6 The utility model introduces a quick clamping device for testing the volume resistivity of a cable conductor shield.

[0036] Specifically, if Figures 1 to 3 As shown, the quick clamping device for testing the volume resistivity of the cable conductor shield includes a first insulating part 1, an electrode group 4 and a second insulating part 2. Among them, the first insulating part 1 is fixedly arranged as a basic support structure, which can fix the electrode group 4 and provide a stable test platform. The electrode group 4 includes at least four test electrodes 41 to meet the requirements of national standards (such as GB / T12706-2020, GB / T11017-2014). These test electrodes 41 are arranged at intervals along a preset first axis and are installed on the first insulating part 1. Each test electrode 41 has an electrical connection surface at one end away from the first insulating part 1, and these electrical connection surfaces can support the sample 3 to be tested to ensure good electrical contact. The second insulating part 2 is arranged at intervals from the first insulating part 1, so that the electrode group 4 is arranged between the second insulating part 2 and the first insulating part 1, and the distance between the first insulating part 1 and the second insulating part 2 is adjustable along the preset second axis, and the preset second axis is perpendicular to the preset first axis.

[0037] During the test, the second insulating member 2 can simultaneously press the sample 3 to be tested against the electrical connection surfaces of at least four test electrodes 41, thereby facilitating the energization of the test electrodes 41 for volume resistivity testing. Optionally, in this embodiment, both the first insulating member 1 and the second insulating member 2 are plate members, with the first axis being horizontal and the second axis being vertical. The first insulating member 1 and the second insulating member 2 are arranged in parallel, with the first axis being parallel to the first insulating member 1 and the second axis being perpendicular to the first insulating member 1, to facilitate direct placement of the sample 3 to be tested on the test electrodes 41.

[0038] For example, when used, Figure 1 As shown, first move the second insulating member 2 away from the first insulating member 1, so as to facilitate the placement of the cable shield to be tested on the test cable. Figure 2 、 Figure 3 As shown, the second insulating member 2 is moved toward the first insulating member 1, pressing the cable shield against the electrical connection surfaces of the four test electrodes 41. The second insulating member 2 is then secured, completing the preparatory steps for testing. Subsequently, by energizing the test electrodes 41, the volume resistivity test can be performed.

[0039] Through the quick clamping device for testing the volume resistivity of the cable conductor shield, the sample to be tested 3 and the test electrode 41 can be conveniently pressed and connected, and the step of manually applying the silver electrode on the sample to be tested 3 is avoided. This not only ensures a reliable and long-lasting electrical connection between the test electrode 41 and the sample to be tested 3, but also simplifies the preparation steps, reduces the difficulty of the testing process, improves the accuracy and efficiency of the test results, and enables the quick clamping device for testing the volume resistivity of the cable conductor shield to be applicable to samples of different thicknesses, which is conducive to batch testing.

[0040] Specifically, in this embodiment, the quick clamping device for testing the volume resistivity of the cable conductor shield further includes a locking assembly to adjust the distance between the second insulating member 2 and the first insulating member 1. Figure 2 、 Figure 3 As shown, the locking assembly includes a connector 5 and a locking member 6. The locking member 6 has a locking hole. The connector 5 is inserted into the locking hole, and the locking member 6 is adjustably fixed along the connector 5. One end of the connector 5 is fixedly connected to the first insulating member 1, and the locking member 6 is fixedly installed on the second insulating member 2. When it is necessary to adjust the distance between the first insulating member 1 and the second insulating member 2, the locking member 6 and the connector 5 are first unlocked, and the locking member 6 can be moved along the connector 5 to increase or decrease the distance between the first insulating member 1 and the second insulating member 2. When the distance between the first insulating member 1 and the second insulating member 2 is adjusted to the desired position, the locking member 6 and the connector 5 are locked, and the locking member 6 can be fixed to the preset position on the connector 5, so that the distance between the first insulating member 1 and the second insulating member 2 remains relatively fixed.

[0041] More specifically, in this embodiment, the connecting member 5 is a steel wire rope, and the locking member 6 is a wire lock. Figure 2 、 Figure 3 As shown, one end of the wire rope is fixed to the first insulating member 1 via a fixing post. The wire rope is then threaded through the second insulating member 2 in a direction parallel to a predetermined second axis, allowing the distance between the second insulating member 2 and the first insulating member 1 to be adjusted along the predetermined second axis. A wire locker is threaded through the second insulating member 2 and secured with a nut. The wire rope is threaded through the locking hole of the wire locker along its axis and simultaneously threaded through the second insulating member 2.

[0042] Furthermore, in this embodiment, the quick clamping device for testing the volume resistivity of the cable conductor shield also includes a guide assembly, which is used to guide the second insulating part 2 to approach and move away from the first insulating part 1 along a preset second axis to avoid deviation of the second insulating part 2 and reduce the difficulty of moving the second insulating part 2.

[0043] Specifically, if Figure 2 、 Figure 3As shown, the guide assembly includes four guide rods 7, the axes of which are parallel to a predetermined second axis. One end of the guide rod 7 is fixedly mounted on the first insulating member 1, and the guide rod 7 slides through the second insulating member 2. When adjusting the distance between the second insulating member 2 and the first insulating member 1, the wire lock is first unlocked, and the second insulating member 2 can be slid along the guide rods 7. This facilitates adjustment by the tester, avoids misalignment between the second insulating member 2 and the first insulating member 1, and ensures that the sample 3 to be tested can be reliably pressed against the test electrode 41.

[0044] Of course, in some other embodiments, two or three guide rods 7 may be used, as long as they can play a limiting and guiding role on the second insulating member 2. Preferably, the quick clamping device for testing the volume resistivity of the cable conductor shield includes four steel wires and four lockers. The first insulating member 1 has four vertices, each of which is equipped with a steel wire, and a wire locker is installed at the corresponding position of the second insulating member 2, so that the second insulating member 2 can fit and press the sample 3 to be tested against the test electrode 41, thereby improving the reliability of the pressing.

[0045] like Figure 4 、 Figure 5 As shown, in this embodiment, the electrode group 4 further includes an electrode base 42, and the test electrode 41 is detachably mounted on the electrode base 42, and the electrode base 42 is detachably mounted on the first insulating member 1. By separating the electrode base 42 from the first insulating member 1, different test electrodes 41 can be easily replaced according to test needs, thereby improving test efficiency.

[0046] More specifically, in this embodiment, the test electrode 41 includes an electrode holder 412 and an electrode test head 411, one end of the electrode holder 412 is mounted on the electrode base 42, and the other end of the electrode holder 412 is mounted with the electrode test head 411, and an electrical connection surface is provided at one end of the electrode test head 411 away from the electrode base 42. In this embodiment, the sample to be tested 3 is a cable shielding layer cut along its axis, so the electrical connection surface of the electrode test head 411 includes a cylindrical surface and a conical surface, which can be attached to the inner circumference of the cable shielding layer along the circumferential direction, thereby achieving a good and reliable electrical connection effect. When the sample to be tested 3 is of other shapes, the electrode base 42 can be directly separated from the first insulating member 1 and replaced with an electrode test head 411 having an electrical connection surface of a corresponding shape or a corresponding size, thereby ensuring an excellent electrical connection effect between the electrode test head 411 and the sample to be tested 3, thereby ensuring the accuracy and reliability of the test results.

[0047] like Figure 5 、 Figure 6As shown, in this embodiment, the first insulating member 1 is provided with a snap seat 11, and the electrode base 42 is provided with a snap connector 43. The snap connector 43 is detachably connected to the snap seat 11, thereby facilitating the disassembly and installation of the electrode base 42.

[0048] Preferably, in this embodiment, the first insulating part 1 is provided with a first positioning part 12, and the electrode base 42 is provided with a second positioning part 44. The first positioning part 12 and the second positioning part 44 can be limitedly plugged into each other so that the electrode base 42 can be limitedly installed on the first insulating part 1, thereby ensuring that the installation position of the electrode base 42 is accurate and reliable.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A quick clamping device for testing the volume resistivity of cable conductor shielding, characterized in that: include: a first insulating member (1); An electrode group (4), the electrode group (4) comprising at least four test electrodes (41), the at least four test electrodes (41) being arranged at intervals along a preset first axis and mounted on the first insulating member (1), the test electrodes (41) having an electrical connection surface at one end away from the first insulating member (1), the electrical connection surface being capable of supporting a sample (3) to be tested; A second insulating member (2), the electrode group (4) is arranged between the second insulating member (2) and the first insulating member (1), the second insulating member (2) and the first insulating member (1) are arranged at an adjustable distance along a preset second axis, the second insulating member (2) is capable of simultaneously pressing the sample to be tested (3) against the electrical connection surfaces of at least four test electrodes (41), and the preset second axis is perpendicular to the preset first axis.

2. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 1, characterized in that: The quick clamping device for testing the volume resistivity of the cable conductor shield further comprises a locking assembly, wherein the locking assembly comprises a connecting piece (5) and a locking piece (6), wherein the locking piece (6) has a locking hole, the connecting piece (5) is passed through the locking hole, and the locking piece (6) is fixedly arranged along the connecting piece (5) in an adjustable manner. One end of the connecting member (5) is fixedly connected to the first insulating member (1), and the locking member (6) is fixedly mounted on the second insulating member (2), so that the distance between the second insulating member (2) and the first insulating member (1) can be adjusted.

3. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 2, characterized in that: The connecting member (5) is a steel wire rope, and the locking member (6) is a wire locker.

4. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 3, characterized in that: The quick clamping device for testing the volume resistivity of the cable conductor shield further comprises a guide assembly, which is used to guide the second insulating member (2) to approach and move away from the first insulating member (1) along the preset second axis.

5. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 4, characterized in that: The guide assembly comprises at least three guide rods (7), one end of each guide rod (7) is fixedly mounted on the first insulating member (1), the axial direction of each guide rod (7) is parallel to the preset second axis, and each guide rod (7) is slidably disposed in the second insulating member (2).

6. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 5, characterized in that: The first insulating member (1) and the second insulating member (2) are both plate members, and the first insulating member (1) and the second insulating member (2) are arranged in parallel, the preset first axis is parallel to the first insulating member (1), and the preset second axis is perpendicular to the first insulating member (1). The first insulating member (1) has four apex portions, each of which is equipped with the guide rod (7) and the steel wire rope, and the second insulating member (2) is equipped with four corresponding wire lockers.

7. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 1, characterized in that: The electrode group (4) further comprises an electrode base (42), the test electrode (41) is detachably mounted on the electrode base (42), and the electrode base (42) is detachably mounted on the first insulating member (1).

8. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 7, characterized in that: The first insulating member (1) is provided with a snap seat (11), and the electrode base (42) is provided with a snap connector (43), and the snap connector (43) is detachably connected to the snap seat (11).

9. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 7, characterized in that: The first insulating member (1) is provided with a first positioning member (12), and the electrode base (42) is provided with a second positioning member (44). The first positioning member (12) and the second positioning member (44) can be plugged in and matched in a limited manner so that the electrode base (42) is installed in a limited manner on the first insulating member (1).

10. The quick clamping device for testing the volume resistivity of a cable conductor shield according to claim 7, characterized in that: The test electrode (41) comprises an electrode bracket (412) and an electrode test head (411); one end of the electrode bracket (412) is mounted on the electrode base (42); the electrode test head (411) is mounted on the other end of the electrode bracket (412); and the electrical connection surface is provided at one end of the electrode test head (411) away from the electrode base (42).

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