Electrode clamp for testing resistivity of cable semi-conductive shielding layer

Abstract

The utility model discloses an electrode clamp for testing the resistivity of a cable semi-conductive shielding layer, which belongs to the technical field of cable shielding layer resistance testing, and comprises a bottom plate, four guide columns fixed on the bottom plate, a top plate fixed at the end parts of the four guide columns, and a sliding plate arranged on the four guide columns in a sliding manner, the end portion of the threaded rod is rotatably arranged on the sliding plate, a rotating disc is arranged at the end portion of the threaded rod, the measuring assembly is arranged on the bottom plate and used for fixing and testing a cable material, the measuring assembly comprises a measuring table installed on the bottom plate and a plurality of measuring hoops arranged on the measuring table in a sliding mode, and the measuring hoops are electrically connected with the measuring table; the main shaft is symmetrically and rotatably arranged on the bottom plate and is used for tightening the plurality of measuring hoops; and the clamping assembly is arranged on the sliding plate and used for clamping the cable material, meanwhile, the main shaft is driven to rotate through a driving assembly, and the clamping assembly comprises a clamping plate arranged on the lower side of the sliding plate in a sliding mode.

Description

Technical Field

[0001] This utility model belongs to the field of cable shielding layer resistance testing technology, and in particular relates to an electrode clamp for testing the resistivity of cable semiconductive shielding layer. Background Technology

[0002] The resistivity of the semi-conductive shielding layer of a cable has a significant impact on its conductivity, directly affecting the service life and reliability of the power cable. The resistivity test of the semi-conductive shielding layer is an effective preventive test to determine whether the cable is qualified. Therefore, the resistivity test of the semi-conductive shielding layer of a cable is of great significance for the normal use of the cable.

[0003] Traditional semiconductive shielding layer testing involves clamping the material to be measured and securing it with a measuring clamp. The resistance value of the material is measured by the fit between the measuring clamp and the material. However, in existing equipment, the size of the measuring clamp is generally fixed, and it needs to be manually tightened to ensure it fits the material surface for each measurement. Since the materials being measured vary in size, existing equipment is not convenient for clamping and measuring, as it cannot be adjusted according to the diameter of the material. This affects the practicality and ease of use of the equipment. Furthermore, an improper fit of the measuring clamp can affect the accuracy of the measurement data. For example, the aforementioned problem exists in patents CN202420631240.0 and CN201721710479.3, where the size of the measuring clamp cannot be adjusted according to the material size during measurement. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an electrode clamp for testing the resistivity of the semiconductive shielding layer of cables, which solves the problem that the size of the measuring clamp cannot be changed according to the dimensions during equipment measurement, resulting in unstable measurement data when the equipment is clamped.

[0005] This utility model is implemented as follows: an electrode clamp for testing the resistivity of a cable semiconductive shielding layer includes a base plate, four guide posts fixed to the base plate, a top plate fixed to the ends of the four guide posts, and a sliding plate slidably mounted on the four guide posts. A threaded rod is threadedly connected to the top plate, and the end of the threaded rod is rotatably mounted on the sliding plate. A turntable is provided at the end of the threaded rod. The device also includes:

[0006] The measuring assembly, set on the base plate, is used for fixing and testing cable materials. It includes a measuring platform mounted on the base plate, multiple measuring clamps slidably set on the measuring platform, and the measuring clamps are electrically connected to the measuring platform.

[0007] A symmetrically rotating spindle is mounted on the base plate for tightening multiple measuring clamps;

[0008] A clamping assembly, mounted on a slide plate, is used to clamp cable material and simultaneously drives a spindle to rotate via a drive assembly, including a clamping plate slidably mounted on the underside of the slide plate.

[0009] As a preferred embodiment of this invention, the measuring assembly further includes a take-up shaft mounted on the main shaft. The number of take-up shafts is the same as the number of measuring hoops. A pull rope is wound around the take-up shaft, and the end of the pull rope is fixedly connected to the end of the measuring hoops.

[0010] In a preferred embodiment of this invention, the measuring hoop is in the form of a ring-shaped cross, with the end of the measuring hoop passing through the measuring platform. The ends of the measuring hoop are located on both sides of the measuring platform, and the winding directions of the winding shafts on both sides are opposite.

[0011] As a preferred embodiment of the present invention, the clamping assembly further includes a mounting bracket fixedly disposed on the underside of the slide plate, the clamping plate being slidably disposed within the mounting bracket, and a spring for increasing the clamping plate pressure being fixedly disposed on one side of the clamping plate.

[0012] As a preferred embodiment of this invention, the drive assembly includes racks fixedly disposed on both sides of the clamping plate; and gears mounted on the main shaft and meshing with the racks.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a clamping plate and spring in the device to effectively clamp materials, ensuring stability during measurement. During clamping, the drive assembly can effectively change the size of the measuring clamp, allowing it to fit snugly against materials of different sizes, thus ensuring the measurement accuracy of the device. Simultaneously, the measuring clamp can also serve as a fixing element to secure the material, further guaranteeing the accuracy of the measurement and ensuring the stability of the measuring clamp electrode during measurement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure from the lower side of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of this utility model from a partial upper view.

[0018] Figure 4 This is a schematic diagram of the internal structure of this utility model from a partial frontal view.

[0019] In the picture:

[0020] 1. Base plate; 2. Guide column; 3. Top plate; 4. Slide plate; 5. Threaded rod; 6. Turntable; 7. Measuring table; 8. Measuring hoop; 9. Rewinding shaft; 10. Pull rope; 11. Main shaft; 12. Mounting bracket; 13. Clamping plate; 14. Spring; 15. Rack; 16. Gear. Detailed Implementation

[0021] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0022] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1 to 4 As shown in the figure, an electrode fixture for testing the resistivity of a cable semiconducting shield layer provided by this utility model includes a base plate 1, four guide posts 2 fixed on the base plate 1, a top plate 3 fixed to the ends of the four guide posts 2, a sliding plate 4 slidably disposed on the four guide posts 2, a threaded rod 5 threadedly connected to the top plate 3, and the end of the threaded rod 5 rotatably disposed on the sliding plate 4, and a turntable 6 disposed at the end of the threaded rod 5, and further includes:

[0024] The measuring assembly, set on the base plate 1, is used for fixing and testing cable materials. It includes a measuring platform 7 mounted on the base plate 1, and multiple measuring clamps 8 slidably set on the measuring platform 7, with the measuring clamps 8 electrically connected to the measuring platform 7.

[0025] A main shaft 11, symmetrically rotated and mounted on the base plate 1, is used to tighten multiple measuring hoops 8;

[0026] A clamping assembly, mounted on the slide plate 4, is used to clamp cable material and drives the spindle 11 to rotate via a drive assembly, including a clamping plate 13 slidably mounted on the underside of the slide plate 4.

[0027] As a preferred embodiment of this invention, the measuring assembly further includes a take-up shaft 9 mounted on the main shaft 11. The number of take-up shafts 9 is the same as the number of measuring hoops 8. A pull rope 10 is wound on the take-up shaft 9. The end of the pull rope 10 is fixedly connected to the end of the measuring hoop 8 to adjust the size of the measuring hoop 8 so that it can fit tightly against the surface of the measuring material, thereby further improving the measurement accuracy of the equipment.

[0028] As a preferred embodiment of this utility model, the measuring hoop 8 is in the shape of a ring cross, and the end of the measuring hoop 8 passes through the measuring platform 7. The ends of the measuring hoop 8 are located on both sides of the measuring platform 7, and the winding shafts 9 on both sides have opposite winding directions, which is used to improve the measurement accuracy and at the same time ensure that the two ends of the winding shaft 9 are pulled out in a cross shape.

[0029] As a preferred embodiment of this utility model, the clamping assembly further includes a mounting bracket 12 fixedly disposed on the lower side of the slide plate 4, a clamping plate 13 slidably disposed within the mounting bracket 12, and a spring 14 fixedly disposed on one side of the clamping plate 13 for increasing the pressure of the clamping plate 13, for fastening the measuring material, ensuring the stability of the measuring material, and simultaneously clamping it.

[0030] As a preferred embodiment of this utility model, the drive assembly includes racks 15 fixedly disposed on both sides of the clamping plate 13; and gears 16 mounted on the main shaft 11 and meshing with the racks 15, which are used to simultaneously drive multiple measuring hoops 8 to wind up and unwind, so that the measuring hoops 8 can be changed according to the diameter of the measuring material, further improving the practicality and ease of use of the equipment.

[0031] The working principle of this utility model:

[0032] refer to Figure 1 The material to be tested is passed through the measuring clamp 8 in sequence, positioning it inside the clamp 8. Then, the turntable 6 is rotated, causing the threaded rod 5 to rotate. As the threaded rod 5 rotates, it drives the sliding plate 4 to move downwards. (Refer to...) Figure 2 As the slide plate 4 moves downward, the mounting bracket 12 and the clamping plate 13 gradually move downward, as shown in the reference. Figure 4 When the mounting bracket 12 moves downward, because the clamping plate 13 is fixed to the rear spring 14 and the clamping plate 13 has not yet come into contact with the material, the force on the rack 15 will not drive the gear 16 to rotate. When the clamping plate 13 comes into contact with the cable material, the clamping plate 13 is squeezed and moves upward, while the spring 14 on the rear side of the clamping plate 13 is gradually compressed. As the spring 14 is gradually compressed, the rack 15 gradually moves upward. When the rack 15 moves upward, refer to... Figure 3 The rack 15 drives the gear 16 to rotate. When the gear 16 rotates, it drives the winding shaft 9 to rotate. At this time, the winding shaft 9 winds up the pull rope 10. When the pull rope 10 is wound up, it gradually pulls the two ends of the measuring hoop 8 to move to both sides, that is, the inner diameter of the measuring hoop 8 shrinks. As the measuring hoop 8 gradually shrinks, it gradually fits against the surface of the measuring material. At the same time, the clamping plate 13 is squeezed by the spring 14 and clamps the measuring material from the outside to ensure the stability of the material measurement. The measuring hoop 8 also tightens the material and performs resistance measurement. The measurement result is transmitted to the outside through the measuring table 7 and recorded on the external display.

[0033] After the equipment completes the measurement, the drive threaded rod 5 rotates in the opposite direction, which in turn causes the slide plate 4 to move upward. At this time, the mounting bracket 12 moves upward, and the rack 15 drives the gear 16 to rotate in the opposite direction, which in turn causes the main shaft 11 to gradually drive the winding shaft 9 to rotate in both directions, so that the measuring clamp 8 is gradually loosened in order to prepare for the next measurement of the equipment.

[0034] This invention utilizes the clamping plate 13 and spring 14 in the device to effectively clamp the material, ensuring stability during material measurement. During clamping, the size of the measuring clamp 8 can be effectively changed in conjunction with the drive assembly, allowing the measuring clamp 8 to fit effectively onto the surface of materials of different sizes, thereby ensuring the measurement accuracy of the device. At the same time, the measuring clamp 8 can also serve as a fixing component to secure the material, further ensuring the measurement accuracy of the device and the stability of the electrodes of the measuring clamp 8 during measurement.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrode fixture for testing the resistivity of a cable semiconductive shielding layer, comprising a base plate (1), four guide posts (2) fixed on the base plate (1), a top plate (3) fixed at the ends of the four guide posts (2), and a sliding plate (4) slidably disposed on the four guide posts (2), wherein a threaded rod (5) is threadedly connected to the top plate (3), and the end of the threaded rod (5) is rotatably disposed on the sliding plate (4), and a turntable (6) is disposed at the end of the threaded rod (5), characterized in that: Also include: Measurement assembly, arranged on the base plate (1), for the fixation and test of cable material, including a measurement table (7) installed on the base plate (1), a plurality of measurement clamps (8) slidingly arranged on the measurement table (7), and the measurement clamps (8) are electrically connected with the measurement table (7); The main shaft (11) is symmetrically arranged on the base plate (1) for tightening the plurality of measurement clamps (8); Clamping assembly, arranged on the sliding plate (4), for clamping the cable material, and the main shaft (11) is driven to rotate by a driving assembly, including a clamping plate (13) slidingly arranged on the lower side of the sliding plate (4).

2. An electrode fixture for testing the resistivity of a semi-conductive shield layer of a cable as defined in claim 1, characterized in that: The measurement assembly further comprises a winding shaft (9) installed on the main shaft (11), the number of the winding shaft (9) is the same as the number of the measurement clamps (8), the winding shaft (9) is wound with a pull rope (10), and the end of the pull rope (10) is fixedly connected with the end of the measurement clamp (8).

3. An electrode fixture for testing the resistivity of a semi-conductive shield layer of a cable as defined in claim 2, characterized in that: The measurement clamps (8) are in the shape of ring intersection, the ends of the measurement clamps (8) pass through the measurement table (7), the ends of the measurement clamps (8) are located on both sides of the measurement table (7), and the winding directions of the winding shafts (9) on both sides are opposite.

4. An electrode fixture for testing the resistivity of a semi-conductive shield layer of a cable as defined in claim 3, characterized in that: The clamping assembly further comprises a mounting bracket (12) fixedly arranged on the lower side of the sliding plate (4), the clamping plate (13) is slidingly arranged in the mounting bracket (12), and one side of the clamping plate (13) is fixedly provided with a spring (14) for increasing the clamping force of the clamping plate (13).

5. An electrode fixture for testing the resistivity of a semi-conductive shield layer of a cable as defined in claim 4, characterized in that: The driving assembly comprises a rack (15) fixedly arranged on both sides of the clamping plate (13); and a gear (16) installed on the main shaft (11) and corresponding engaged with the rack (15).

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