Tool device for measuring resistivity of semi-conductive shielding layer of conductor

Abstract

The utility model relates to the technical field of resistivity measuring equipment, and particularly discloses a tool device for measuring the resistivity of a semi-conductive shielding layer of a conductor, which comprises a mounting bracket, a position adjusting mechanism arranged at the upper end of the mounting bracket, and a spring pressing mechanism arranged at the lower end of the position adjusting mechanism, the position adjusting mechanism is used for adjusting the position of the spring pressing mechanism, the spring pressing mechanism comprises a pressing assembly and a pre-pressing assembly, the pressing assembly comprises a pressing glass steel plate, the pre-pressing assembly comprises a pre-pressing pressing plate, and an electrode mechanism is arranged at the bottom end of the mounting bracket; according to the utility model, the metal upper top plate and the metal lower bottom plate are adopted, so that the whole tool forms a whole body and is more stable during placement; in the sample compressing process, four electrode positions are compressed at the same time by rotating a wobble plate, the installation steps are simple and convenient, the pre-compressing assembly can finely adjust the angle and the position of a cable, and the placing position of the tested cable is horizontally centered; the device is not limited by the external diameter of a test cable, is wide in measurement range, and facilitates the use.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistivity measuring equipment, and in particular relates to a tooling device for measuring the resistivity of a semi-conductive shielding layer of a conductor. Background Art

[0002] According to the requirements of JB / T11167.1 and GB / T32326.1 Cross-linked polyethylene insulated long-length AC submarine cables and accessories Part 1 Test methods and requirements, the resistivity of the semi-conductive shield of the cable conductor should be measured on a separate sample. Samples should be taken from the insulating core of the untreated cable sample after manufacturing and from the insulating core of the cable sample that has been aging treated in the material compatibility test to measure the resistivity of the extruded semi-conductive shield on the conductor;

[0003] The traditional tooling for measuring the resistivity of the semi-conductive shielding layer of a cable conductor is composed of a stainless steel retaining spring, a snap bolt, an insulating plate, an electrode and an electrode slot. During installation, the insulating plate needs to be installed into the electrode slot in sequence. The traditional tooling for measuring the resistivity of the semi-conductive shielding layer of a cable conductor has the problems of unstable placement during use, cumbersome installation, and easy slipping of the electrode sheet during installation. There are requirements for the core size. When measuring the resistivity of the semi-conductive shielding layer of a core conductor with a smaller cross-section, the core installation is not secure due to the length of the snap bolt, making it inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a tooling device for measuring the resistivity of a semi-conductive shielding layer of a conductor, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A tooling device for measuring the resistivity of a conductor semi-conductive shielding layer, comprising:

[0007] The mounting bracket is provided with a position adjustment mechanism at the upper end of the mounting bracket, and a spring clamping mechanism is installed at the lower end of the position adjustment mechanism, and the position adjustment mechanism is used to adjust the position of the spring clamping mechanism, and the spring clamping mechanism includes a clamping assembly and a pre-clamping assembly, and the clamping assembly includes a clamping glass fiber reinforced plastic plate, and the pre-clamping assembly includes a pre-clamping plate, and the clamping glass fiber reinforced plastic plate and the pre-clamping plate are both made of glass fiber reinforced plastic insulation materials, and the clamping glass fiber reinforced plastic plate is used to clamp the cable, and the pre-clamping plate is used to pre-clamp the cable, which is convenient for position fine-tuning, and the lower ends of the clamping glass fiber reinforced plastic plate and the pre-clamping plate are both set to arc shape, which is convenient for contacting and clamping the cable, and the pre-clamping glass fiber reinforced plastic plate is short in length but large in arc radius. When testing a large-section test cable, it is completely clamped by the clamping glass fiber reinforced plastic plate. When testing a small-section test cable, the pre-clamping plate plays an auxiliary clamping role because the arc height of the clamping glass fiber reinforced plastic plate is too high. The bottom end of the mounting bracket is provided with an electrode mechanism for connecting the electrode, and the electrode mechanism is located below the spring clamping mechanism.

[0008] Preferably, the mounting bracket includes an upper top plate, a supporting vertical rod and a lower bottom plate, the upper top plate and the lower bottom plate are connected by the supporting vertical rod, and the supporting vertical rod is arranged in four groups, which are respectively arranged at the end positions of the upper top plate and the lower bottom plate.

[0009] Preferably, the position adjustment mechanism includes a rocking plate, a lifting cover plate and a lifting screw, the lifting screw is installed in the middle of the upper top plate, the rocking plate is arranged on the upper end of the lifting screw, the outer end of the lifting screw located below the upper top plate is threadedly connected with the lifting cover plate, the ends of the lifting cover plate are provided with a through hole which cooperates with the supporting vertical rod, the lifting cover plate is slidably connected with the supporting vertical rod, and when in use, the rocking plate is rotated to drive the lifting screw to rotate, the lifting cover plate is threadedly connected with the lifting screw, so that the lifting cover plate can be raised or lowered and moved vertically.

[0010] Preferably, the clamping assembly is installed at the lower end of the lifting cover plate, the clamping assembly and the pre-clamping assembly are arranged in four groups, each group of the clamping assembly includes two groups of the clamping glass fiber reinforced plastic plates, the pre-clamping assembly is respectively located between the two groups of the clamping glass fiber reinforced plastic plates, the pre-clamping assembly also includes a spring adjustment rod, an adjustment spring, a metal plate and a mounting strip plate, the mounting strip plates are arranged between the two groups of the clamping glass fiber reinforced plastic plates, the spring adjustment rods are arranged at both ends of the mounting strip plates, two through holes matching with the spring adjustment rods are opened inside the two ends of the mounting strip plates, the spring adjustment rods are arranged at both ends of the mounting strip plates, and the spring adjustment rods are arranged at both ends of the mounting strip plates. The upper end of the whole rod is connected to the bottom end of the lifting cover, the middle part of the bottom end of the mounting strip is connected to a metal plate, the bottom ends of the mounting strips on both sides of the metal plate are connected to the pre-tightening plates, and the outer end of the spring adjustment rod located at the upper end of the mounting strip is sleeved with the adjustment spring. During installation, when the lifting cover is moved downward, the lower end of the pre-tightening plate will first contact the cable, and then the lifting cover will stop moving downward, and the cable position will be fine-tuned to ensure that the cable is in the center position and placed horizontally, and then the lifting cover will continue to move downward, so that the pressing fiberglass plate moves downward and contacts the cable, and is pressed and fixed.

[0011] Preferably, the pre-stressing assembly also includes a limiting rod, and the limiting rod is arranged inside both sides of the pre-stressing plate, and limiting grooves matching with the limiting rod are opened inside both sides of the pressing fiberglass reinforced plastic plate, and the two ends of the limiting rod are respectively located inside the corresponding limiting grooves, and through the cooperation of the setting limiting rod and the limiting groove, the setting installation strip and the pre-stressing plate can be moved relative to the pressing fiberglass reinforced plastic plate, and they can be limited to prevent displacement.

[0012] Preferably, the electrode mechanism includes an insulating plate and an electrode rod. The insulating plate is installed on the upper end of the lower base plate to perform insulation. The electrode rod is arranged on the upper end of the insulating plate. The electrode is arranged on the upper end of the electrode rod. An electrode connection point is also arranged on one side of the electrode rod for connecting the electrode.

[0013] Preferably, the electrode rods are arranged into four groups, and potential end electrodes are arranged at the upper ends of the two middle groups of electrode rods, and current end electrodes are arranged at the upper ends of the two groups of electrode rods on both sides. The potential end electrodes adopt a knife-edge structure, which can better contact with the test cable and make the measurement result more accurate. The current end electrodes adopt a columnar structure and have a large contact area with the cross-section of the test cable.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model adopts a metal upper top plate and a lower bottom plate to form a whole tooling, which is more stable when placed; in the process of pressing the sample, the four electrode positions are pressed at the same time by rotating the shaking plate, the installation steps are simple, and the pre-pressing component can make fine adjustments to the angle and position of the cable, so that the placement position of the test cable is horizontally centered; it is not limited by the outer diameter of the test cable, has a wide measurement range, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a connection diagram of the position adjustment mechanism of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of the spring pressing mechanism of the utility model;

[0019] Figure 4 It is a partial disassembly schematic diagram of the utility model;

[0020] Figure 5 This is a schematic diagram of the installation of the pre-tightening plate of the utility model;

[0021] Figure 6 It is a side view of the electrode mechanism of the utility model;

[0022] Figure 7 This is a schematic diagram of the use state of the utility model;

[0023] In the figure: 11, upper top plate; 12, supporting vertical rod; 13, lower bottom plate;

[0024] 2. Position adjustment mechanism; 21. Rocking plate; 22. Lifting cover plate; 23. Lifting screw;

[0025] 3. Spring clamping mechanism; 31. Pressing glass fiber reinforced plastic plate; 32. Limiting groove; 33. Spring adjustment rod; 34. Mounting strip; 35. Limiting rod; 36. Pre-tightening plate;

[0026] 4. Electrode mechanism; 41. Insulating plate; 42. Electrode rod; 43. Potential end electrode; 44. Electrode connection point; 45. Current end electrode. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example:

[0029] See also Figure 1-Figure 7 As shown, a tooling device for measuring the resistivity of a conductor semi-conductive shielding layer comprises:

[0030] The mounting bracket is provided with a position adjustment mechanism 2 at the upper end of the mounting bracket, and a spring clamping mechanism 3 is installed at the lower end of the position adjustment mechanism 2. The position adjustment mechanism 2 is used to adjust the position of the spring clamping mechanism 3. The spring clamping mechanism 3 includes a clamping component and a pre-clamping component. The clamping component includes a clamping glass fiber reinforced plastic plate 31. The pre-clamping component includes a pre-clamping plate 36. The clamping glass fiber reinforced plastic plate 31 and the pre-clamping plate 36 are both made of glass fiber reinforced plastic insulation material. The clamping glass fiber reinforced plastic plate 31 is used to clamp the cable, and the pre-clamping plate 36 is used to clamp the cable. Pre-tightening is performed to facilitate fine-tuning of the position. The lower ends of the pressing fiberglass plate 31 and the pre-tightening plate 36 are both set to an arc shape, which is convenient for contacting and pressing the cable. The pre-tightening fiberglass plate 31 is short in length but has a large arc radius. When testing a large-section test cable, the pressing is completely performed by the pressing fiberglass plate 31. When testing a small-section test cable, the pre-tightening plate 36 plays an auxiliary pressing role because the arc height of the pressing fiberglass plate 31 is too high. The bottom end of the mounting bracket is provided with an electrode mechanism 4 for connecting the electrode. The electrode mechanism 4 is located below the spring clamping mechanism 3.

[0031] refer to Figure 1-Figure 7 As shown, the mounting bracket includes an upper top plate 11, a supporting vertical rod 12 and a lower bottom plate 13. The upper top plate 11 and the lower bottom plate 13 are connected by the supporting vertical rod 12. The supporting vertical rod 12 is arranged in four groups, which are respectively arranged at the end positions of the upper top plate 11 and the lower bottom plate 13. Both the upper top plate 11 and the lower bottom plate 13 are made of metal.

[0032] refer to Figure 1-Figure 7 As shown, the position adjustment mechanism 2 includes a rocking plate 21, a lifting cover plate 22 and a lifting screw 23. The lifting screw 23 is installed in the middle of the upper top plate 11, and the upper end of the lifting screw 23 is provided with a rocking plate 21. The outer end of the lifting screw 23 located below the upper top plate 11 is threadedly connected with the lifting cover plate 22. The ends of the lifting cover plate 22 are provided with a through hole that matches the supporting vertical rod 12. The lifting cover plate 22 is slidably connected with the supporting vertical rod 12. When in use, the rocking plate 21 is rotated to drive the lifting screw 23 to rotate. The lifting cover plate 22 and the lifting screw 23 are threadedly connected, so that the lifting cover plate 22 can rise or fall and move vertically.

[0033] The position adjustment mechanism 2 manually rotates the rocker 21, and the lifting screw 23 drives the lifting cover 22, and the lifting cover 22 is connected to the spring clamping mechanism 3, so that the test cable can fit tightly with the spring clamping mechanism 3 and the electrode mechanism 4, thereby achieving the effect of fixing the test cable.

[0034] refer to Figure 1-Figure 7 As shown, the clamping assembly is installed at the lower end of the lifting cover 22, and the clamping assembly and the pre-compression assembly are arranged in four groups, each group of the clamping assembly includes two groups of pressing glass fiber reinforced plastic plates 31, and the pre-compression assembly is respectively located between the two groups of pressing glass fiber reinforced plastic plates 31. The pre-compression assembly also includes a spring adjustment rod 33, an adjustment spring, a metal plate and a mounting strip 34. A mounting strip 34 is arranged between the two groups of pressing glass fiber reinforced plastic plates 31, and spring adjustment rods 33 are arranged at both ends of the mounting strip 34. Two through holes matching the spring adjustment rods 33 are provided inside the two ends of the mounting strip 34, and the upper ends of the spring adjustment rods 33 are aligned with the bottom ends of the lifting cover 22. The bottom end of the spring adjustment rod 33 is connected with an anti-dropping block, the middle part of the bottom end of the mounting strip 34 is connected with a metal plate, the bottom ends of the mounting strips 34 on both sides of the metal plate are connected with pre-tightening plates 36, and the outer end of the spring adjustment rod 33 at the upper end of the mounting strip 34 is sleeved with an adjustment spring. During installation, when the lifting cover 22 is moved down, the lower end of the pre-tightening plate 36 will first contact the cable, and then the lifting cover 22 will be stopped from moving down, and the cable position will be fine-tuned to ensure that the cable is in the center position and placed horizontally, and then the lifting cover 22 will continue to move down, so that the pressing glass fiber reinforced plastic plate 31 moves down and contacts the cable, and is pressed and fixed.

[0035] refer to Figure 1-Figure 7 As shown, the pre-stressing assembly also includes a limit rod 35. The limit rods 35 are arranged inside the two sides of the pre-stressing plate 36. The limit grooves 32 that cooperate with the limit rods 35 are opened inside the two sides of the pressing glass fiber reinforced plastic plate 31. The two ends of the limit rod 35 are respectively located inside the corresponding limit grooves 32. Through the cooperation of the set limit rod 35 and the limit groove 32, the set installation strip 34 and the pre-stressing plate 36 can be moved relative to the pressing glass fiber reinforced plastic plate 31, and they can be limited to prevent displacement.

[0036] refer to Figure 1-Figure 7 As shown, the electrode mechanism 4 includes an insulating plate 41 and an electrode rod 42. The insulating plate 41 is installed on the upper end of the lower base plate 13 to play an insulating role. The electrode rod 42 is arranged on the upper end of the insulating plate 41. The electrode is arranged on the upper end of the electrode rod 42. An electrode is also arranged on one side of the electrode rod 42 for connecting the electrode.

[0037] refer to Figure 1-Figure 7 As shown, the electrode rods 42 are arranged into four groups, the upper ends of the two middle groups of electrode rods 42 are provided with potential end electrodes 43, and the upper ends of the two groups of electrode rods 42 on both sides are provided with current end electrodes 45. The potential end electrodes 43 adopt a knife-edge structure, which can better contact with the test cable and make the measurement result more accurate. The current end electrodes 45 adopt a columnar structure and have a large contact area with the cross-section of the test cable.

[0038] When in use, cut the 150mm finished cable insulation core sample into two halves longitudinally, remove the conductor and isolation layer (if any), and prepare the conductor shielding sample. Select a suitable electrode and place it on the electrode rod 42, and place the potential end electrode 43 with the small surface facing outward. Place the prepared sample in the tooling, rotate the rocker 21 to lower the spring clamping mechanism 3 until the pre-tightening plate 36 contacts the sample, stop rotating, and fine-tune the angle and position of the sample to ensure that the sample is in the center and placed horizontally. After the adjustment is completed, continue to rotate the rocker 21 so that the compressed fiberglass plate 31 continues to move down and contact the cable to compress the sample. Then use a suitable clamp to connect the electrode connection point 44, place it in an oven preheated to the specified temperature, and measure the resistance between the electrodes after at least 30 minutes of constant temperature.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooling device for measuring the resistivity of a conductor semi-conductive shielding layer, characterized in that: include: A mounting bracket, wherein a position adjustment mechanism (2) is arranged at the upper end of the mounting bracket, a spring clamping mechanism (3) is arranged at the lower end of the position adjustment mechanism (2), the position adjustment mechanism (2) is used to adjust the position of the spring clamping mechanism (3), the spring clamping mechanism (3) comprises a clamping assembly and a pre-clamping assembly, the clamping assembly comprises a clamping glass fiber reinforced plastic plate (31), the pre-clamping assembly comprises a pre-clamping plate (36), the lower ends of the clamping glass fiber reinforced plastic plate (31) and the pre-clamping plate (36) are both configured to be arc-shaped, and an electrode mechanism (4) is arranged at the bottom end of the mounting bracket, the electrode mechanism (4) is located below the spring clamping mechanism (3).

2. A tooling device for measuring the resistivity of a conductor semi-conductive shielding layer according to claim 1, characterized in that: The mounting bracket comprises an upper top plate (11), a supporting vertical rod (12) and a lower bottom plate (13); the upper top plate (11) and the lower bottom plate (13) are connected via the supporting vertical rod (12); and the supporting vertical rod (12) is arranged in four groups.

3. A tooling device for measuring the resistivity of a conductor semi-conductive shielding layer according to claim 2, characterized in that: The position adjustment mechanism (2) comprises a rocking plate (21), a lifting cover plate (22) and a lifting screw (23); the lifting screw (23) is installed in the middle of the upper top plate (11); the rocking plate (21) is arranged at the upper end of the lifting screw (23); the outer end of the lifting screw (23) located below the upper top plate (11) is threadedly connected to the lifting cover plate (22); the end of the lifting cover plate (22) is provided with a through hole that matches the supporting vertical rod (12); the lifting cover plate (22) is slidably connected to the supporting vertical rod (12).

4. The device for measuring the resistivity of a conductor semi-conductive shielding layer according to claim 3, characterized in that: The clamping assembly is installed at the lower end of the lifting cover plate (22). The clamping assembly and the pre-compression assembly are both arranged in four groups. Each group of the clamping assembly includes two groups of the pressing glass fiber reinforced plastic plates (31). The pre-compression assembly is respectively located between the two groups of the pressing glass fiber reinforced plastic plates (31). The pre-compression assembly also includes a spring adjustment rod (33), an adjustment spring, a metal plate and a mounting strip (34). The mounting strip (34) is arranged between the two groups of the pressing glass fiber reinforced plastic plates (31). Both ends of the mounting strip (34) are provided with The spring adjustment rod (33) is arranged, and two through holes matching the spring adjustment rod (33) are provided inside the two ends of the installation strip (34). The upper ends of the spring adjustment rod (33) are connected to the bottom end of the lifting cover (22). The middle part of the bottom end of the installation strip (34) is connected to the metal plate. The bottom ends of the installation strip (34) located on both sides of the metal plate are connected to the pre-tightening plates (36). The outer end of the spring adjustment rod (33) located at the upper end of the installation strip (34) is sleeved with the adjustment spring.

5. The device for measuring the resistivity of a conductor semi-conductive shielding layer according to claim 4, characterized in that: The pre-pressing assembly also includes a limiting rod (35), and the limiting rod (35) is arranged inside both sides of the pre-pressing plate (36), and limiting grooves (32) matching with the limiting rod (35) are opened inside both sides of the pressing glass fiber reinforced plastic plate (31), and the two ends of the limiting rod (35) are respectively located inside the corresponding limiting grooves (32).

6. The device for measuring the resistivity of a conductor and a semi-conductive shielding layer according to claim 5, characterized in that: The electrode mechanism (4) comprises an insulating plate (41) and an electrode rod (42); the insulating plate (41) is mounted on the upper end of the lower base plate (13); the electrode rod (42) is arranged on the upper end of the insulating plate (41); an electrode is arranged on the upper end of the electrode rod (42); and an electrode connection point (44) is also arranged on one side of the electrode rod (42).

7. A tooling device for measuring the resistivity of a conductor semi-conductive shielding layer according to claim 6, characterized in that: The electrode rods (42) are arranged in four groups, the upper ends of the two middle groups of electrode rods (42) are provided with potential end electrodes (43), and the upper ends of the two groups of electrode rods (42) on both sides are provided with current end electrodes (45), the potential end electrodes (43) adopt a knife-edge structure, and the current end electrodes (45) adopt a columnar structure.

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