A withstand voltage test device for detecting cables
Through the clamping device and memory metal sheet design on the inner side of the insulation detection sleeve, the problems of unstable clamping and leakage risks are solved, and safe connection and protection of cable voltage resistance test are achieved.
Patent Information
- Application Number
- CN202510404953.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2045-04-02
AI Technical Summary
When connecting cables with existing voltage test devices, the cable clamp is not tightly clamped, which may damage the cable core and pose a risk of leakage.
The clamping device on the inner side of the insulating detection sleeve is adopted, including the first clamp, a movable rod, a push rod and a reset assembly, and the secure connection of the cable is achieved through the limiting ring and the fixing assembly, and the memory metal sheet is used to prevent overheating damage.
It improves the safety of voltage resistance test, avoids the risk of cable core damage and leakage, protects the insulation of cable from damage, and prevents thermal damage caused by excessive detection.
Smart Images
Figure CN119916162B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of cable detection devices, and particularly relates to a withstand voltage test device for detecting cables. Background Art
[0002] During the production and manufacturing process of cables, there may be some potential insulation defects, such as air bubbles, impurities, cracks, etc. in the insulation layer. During long-term operation, the insulation performance will also decline due to factors such as aging and moisture absorption. Therefore, it is necessary to use a withstand voltage test device to conduct a withstand voltage test on the cable. The principle is to apply a test voltage higher than its normal operating voltage to the cable to test the insulation reliability and withstand ability of the cable under high voltage.
[0003] Existing withstand voltage test devices mainly consist of a variable frequency power supply, an excitation transformer, a reactor, and a voltage divider. During detection, the above devices need to be connected in sequence. After the connection is completed, a wire is used to connect to the cable to be tested. When connecting the cable, in order to improve the connection efficiency and convenience, generally a wire clamp is used to clamp the cable to be tested. Although the wire clamp can achieve rapid connection of the cable, there are the following deficiencies in actual use:
[0004] First, the clamping position of the wire clamp is the core part of the cable. Since the edge of the clamping opening of the wire clamp is relatively narrow, there may be a problem of insufficient clamping. And the withstand voltage test needs to be carried out for a long time, so repeated clamping operations will damage the core of the cable.
[0005] Second, since the position where the wire clamp clamps the cable lacks protection and is in an exposed device, there may be a risk of electric leakage when using or removing it. Summary of the Invention
[0006] In view of the above problems, the present invention provides a withstand voltage test device for detecting cables to solve the problems raised in the above background art.
[0007] To achieve the above object, the present invention provides the following technical solutions:
[0008] A withstand voltage test device for detecting cables, including an insulating detection sleeve. The open end of the detection sleeve is connected with a limiting ring. The end of the detection sleeve far from the opening is connected with a detection wire. Bar-shaped limiting holes are symmetrically opened at the top and bottom of the detection sleeve. Clamping devices are symmetrically arranged up and down inside the detection sleeve. The clamping device includes a first clamping plate, a first movable rod, a second movable rod, a movable block, a push rod, and a reset component;
[0009] One end of the first movable rod away from the detection line is hinged to the front and rear inner walls of the limit hole. One end of the second movable rod away from the detection line is hinged to the free end of the first movable rod, and the second movable rod is closer to the detection line than the first movable rod. The first clamping plate is hinged at the connection between the first movable rod and the second movable rod. The other end of the second movable rod is hinged to the movable block. The movable block is slidably installed in the limit hole. The push rod is fixedly connected to one side of the movable block away from the axis of the detection sleeve, and the free end of the push rod is inclined in the direction away from the detection line. Fixing components are symmetrically arranged up and down in the limit ring.
[0010] Furthermore, the reset component includes a telescopic rod, a first reset spring, a second reset spring, a first connecting wire, a second connecting wire, a positioning block, and a limiting component;
[0011] The positioning block is located on the side of the movable block close to the detection line. The two ends of the telescopic rod are respectively fixedly connected to the movable block and the positioning block. The first reset spring is sleeved on the telescopic rod, and the two ends of the first reset spring are respectively fixedly connected to the fixed block and the positioning block. The two ends of the second reset spring are respectively fixedly connected to the positioning block and the inner wall of the limit hole close to the detection line. The first connecting wire is connected between the positioning block and the corresponding first clamping plate. The second connecting wire is connected between the detection line and the positioning block.
[0012] Furthermore, the limiting component includes two limiting blocks, two positioning grooves, a shape memory alloy sheet, and a cover plate;
[0013] The two limiting blocks are respectively slidably inserted into the front and rear sides of the positioning block. The limiting blocks can be completely received in the positioning block, and the ends of the limiting blocks and the positioning grooves close to the detection line are both designed with inclined surfaces. The two positioning grooves are symmetrically distributed on the inner walls of the front and rear sides of the limit hole, and the positioning grooves match the positioning block. The shape memory alloy sheet is arc-shaped and is located between the two limiting blocks. The middle part of the shape memory alloy sheet is fixedly connected to the inner wall of the positioning block, and in the initial state, the two ends of the shape memory alloy sheet are kept in close contact with the two limiting blocks. The cover plate is detachably installed on the top of the positioning block.
[0014] Furthermore, the fixing component includes a second clamping plate, a pressure rod, a pry bar, and a limiting post;
[0015] The pressure bar is vertically and fixedly connected to the side of the second clamping plate away from the axis of the limiting ring. The free end of the pressure bar slides through and is inserted into the limiting ring. The limiting column penetrates and is inserted into the free end of the pressure bar in the front-back direction. The pry bar is arranged at the free end of the pressure bar. The whole pry bar is V-shaped, and the V-shaped convex part of the pry bar is hinged to the surface of the detection sleeve through a torsion spring. And the force generated by the first return spring on the first clamping plate is less than the force generated by the torsion spring on the second clamping plate. A notch is provided at the position of the pry bar close to the pressure bar. Through holes in the shape of strips matching the limiting column are penetrated and provided on the inner walls of the front and rear sides of the notch, and both ends of the limiting column are respectively slidably inserted into the two through holes.
[0016] Furthermore, the pry bar is insulated. A pressing plate is fixedly connected to the end of the pry bar away from the limiting column, and the pressing plate is coated with insulating rubber.
[0017] Furthermore, a roller shaft is installed at the free end of the push rod, and the axial direction of the roller shaft is perpendicular to the plane where the two pry bars are located.
[0018] Furthermore, the first clamping plate is arc-shaped, and the concave surface of the first clamping plate faces the direction of the axis of the detection sleeve. A first guiding plate is fixedly connected to the end of the first clamping plate away from the detection line, and the end of the first guiding plate away from the detection line inclines in the direction away from the axis of the detection sleeve.
[0019] Furthermore, the second clamping plate is arc-shaped, and the concave surface of the second clamping plate faces the direction of the axis of the limiting ring. A second guiding plate is fixedly connected to the end of the second clamping plate away from the detection line, and the end of the second guiding plate away from the detection line inclines in the direction away from the axis of the limiting ring. Anti-slip lines are provided on the side of the second clamping plate away from the pressure bar.
[0020] Furthermore, the limiting ring is fixedly connected to the detection sleeve through a plurality of fixing blocks, and the inner diameter of the limiting ring is larger than the inner diameter of the detection sleeve.
[0021] The technical effects and advantages of the present invention:
[0022] 1. Compared with the existing wire clips, in the present invention, since the two first clamping plates realize the electrical connection operation of the cable inside the detection sleeve, the risk of electric leakage that may exist in the existing connection method is avoided, the safety during the withstand voltage test is improved, and when connecting the cable through the detection sleeve, the two second clamping plates can emphatically clamp and fix the insulating part of the cable, thereby avoiding damage to the cable core due to excessive pressure.
[0023] 2. In the present invention, by providing a limiting component, during the cable detection process, when the cable overheats due to excessive detection, the heat generated by the cable can be sequentially transmitted to the shape memory metal sheet through the first clamping plate, the first connecting wire, and the positioning block, so that both ends of the shape memory metal sheet can bend and deflect towards the middle and release the restriction on the limiting block. Subsequently, as the second return spring contracts, the two first clamping plates can be separated from the core part of the cable under the pulling force of the movable block on the first movable rod and the second movable rod, thereby avoiding damage to the cable caused by excessive detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;
[0025] Figure 2 is a three-dimensional cross-sectional view of the detection sleeve in the present invention;
[0026] Figure 3 is a three-dimensional schematic diagram of the first return spring, the telescopic rod, the movable block, the push rod, and the roller in the present invention;
[0027] Figure 4 is a three-dimensional schematic diagram of the positioning block, the limiting block, and the shape memory metal sheet in the present invention;
[0028] Figure 5 is a three-dimensional schematic diagram of the detection sleeve and the second return spring in the present invention;
[0029] Figure 6 is in the present invention Figure 5 Enlarged view of part A;
[0030] Figure 7 is a three-dimensional schematic diagram of the second clamping plate, the pressure rod, the limiting column, and the second guide plate in the present invention.
[0031] In the figure: 1. Detection sleeve; 2. Limiting ring; 3. Detection wire; 4. First clamping plate; 5. First movable rod; 6. Second movable rod; 7. Movable block; 8. Push rod; 9. Telescopic rod; 10. First return spring; 11. Second return spring; 12. First connecting wire; 13. Second connecting wire; 14. Positioning block; 15. Limiting block; 16. Positioning groove; 17. Shape memory metal sheet; 18. Cover plate; 19. Second clamping plate; 20. Pressure rod; 21. Pry bar; 22. Limiting column; 23. Pressure plate; 24. Roller; 25. First guide plate; 26. Second guide plate; 27. Fixed block. DETAILED DESCRIPTION OF THE INVENTION
[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0033] The present invention provides a withstand voltage test device for detecting cables as shown in Figures 1 to 7 Figure 5, which includes an insulating detection sleeve 1. A limiting ring 2 is connected to the open end of the detection sleeve 1. A detection wire 3 is connected to the end of the detection sleeve 1 far from the opening. Strip-shaped limiting holes are symmetrically formed at the top and bottom of the detection sleeve 1. Clamping devices are symmetrically arranged on the upper and lower sides inside the detection sleeve 1. The clamping device includes a first clamping plate 4, a first movable rod 5, a second movable rod 6, a movable block 7, a push rod 8, and a reset assembly.
[0034] One end of the first movable rod 5 far from the detection wire 3 is hinged to the front and rear inner walls of the limiting hole. One end of the second movable rod 6 far from the detection wire 3 is hinged to the free end of the first movable rod, and the second movable rod 6 is closer to the detection wire 3 than the first movable rod 5. The first clamping plate 4 is hinged at the connection between the first movable rod 5 and the second movable rod 6. The other end of the second movable rod 6 is hinged to the movable block 7. The movable block 7 is slidably installed in the limiting hole. The push rod 8 is fixedly connected to the side of the movable block 7 far from the axis of the detection sleeve 1, and the free end of the push rod 8 is inclined in the direction away from the detection wire 3. Fixing components are symmetrically arranged up and down inside the limiting ring 2. The limiting ring 2 is fixedly connected to the detection sleeve 1 through a plurality of fixing blocks 27, and the inner diameter of the limiting ring 2 is larger than the inner diameter of the detection sleeve 1.
[0035] The fixing component includes a second clamping plate 19, a pressure rod 20, a pry bar 21, and a limiting post 22. The pressure rod 20 is vertically and fixedly connected to the side of the second clamping plate 19 far from the axis of the limiting ring 2. The free end of the pressure rod 20 slidably penetrates and is inserted into the limiting ring 2. The limiting post 22 penetrates and is inserted into the free end of the pressure rod 20 from the front and rear directions. The pry bar 21 is arranged at the free end of the pressure rod 20. The pry bar 21 is integrally V-shaped, and the V-shaped convex part of the pry bar 21 is hinged to the surface of the detection sleeve 1 through a torsion spring. The force generated by the first return spring 10 on the first clamping plate 4 is less than the force generated by the torsion spring on the second clamping plate 19. A notch is formed at the position of the pry bar 21 close to the pressure rod 20. Strip-shaped guide holes matching the limiting post 22 are penetrated and formed on the front and rear inner walls of the notch, and both ends of the limiting post 22 are respectively slidably inserted into the two guide holes.
[0036] When connecting the cable, hold the detection sleeve 1 and pinch the free ends of the two pry bars 21 with the index finger and thumb respectively, so that the other end of the pry bar 21 can push up the limit post 22 through the inner wall of the bottom of the guide hole, so that the pressure bar 20 drives the second clamping plate 19 to move away from the axis of the limit ring 2 under the drive of the limit post 22. As the free end of the pry bar 21 gradually deflects downward, when the pry bar 21 contacts the push rod 8, the pry bar 21 can squeeze the push rod 8, so that the push rod 8 drives the movable block 7 to move towards the positioning block 14. As the movable block 7 moves, the reset assembly can be gradually compressed. At the same time, the second movable rod 6 can gradually pull the first movable rod 5, so that the connection between the first movable rod 5 and the second movable rod 6 and the second clamping plate 19 move away from the axis of the detection sleeve 1 together. After the two first clamping plates 4 are attached to the inner wall of the detection sleeve 1, the two second clamping plates 19 also remain attached to the inner wall of the limit ring 2. Then, the cable to be detected is inserted into the detection sleeve 1 through the limit ring 2 in sequence. During the insertion of the cable, the insertion depth of the cable can be observed through the gap between two adjacent fixed blocks 27. When the core part of the cable is inserted into the detection sleeve 1 and the insulating part of the cable is inserted into the limit ring 2, release the two pry bars 21. At this time, the two pry bars 21 can gradually drive the two pressure bars 20 to reset under the action of the torsion spring, so as to clamp the insulating part of the cable through the two second clamping plates 19, and the two first clamping plates 4 can clamp the core part of the cable under the action of the reset assembly, so as to cooperate with the two second clamping plates 19 to improve the stability during cable connection;
[0037] In addition, compared with the existing wire clamps, since the two first clamping plates 4 perform the electrical connection operation on the cable inside the detection sleeve 1, the risk of electric leakage that may exist in the existing connection method is avoided, and the safety during the withstand voltage test is improved.
[0038] As Figures 2 to 6 shown, the reset assembly includes a telescopic rod 9, a first return spring 10, a second return spring 11, a first connecting line 12, a second connecting line 13, a positioning block 14 and a limiting assembly. The positioning block 14 is located on the side of the movable block 7 close to the detection line 3. The two ends of the telescopic rod 9 are respectively fixedly connected to the movable block 7 and the positioning block 14. The first return spring 10 is sleeved on the telescopic rod 9, and the two ends of the first return spring 10 are respectively fixedly connected to the fixed block 27 and the positioning block 14. The two ends of the second return spring 11 are respectively fixedly connected to the positioning block 14 and the inner wall of the limit hole close to one end of the detection line 3. The first connecting line 12 is connected between the positioning block 14 and the corresponding first clamping plate 4. The second connecting line 13 is connected between the detection line 3 and the positioning block 14.
[0039] The limiting component includes two limiting blocks 15, two positioning grooves 16, a shape memory alloy sheet 17 and a cover plate 18. The two limiting blocks 15 are respectively slidably inserted into the front and rear sides of the positioning block 14. The limiting blocks 15 can be completely received into the positioning block 14. The ends of the limiting blocks 15 and the positioning grooves 16 close to the detection line 3 are both designed with inclined surfaces. The two positioning grooves 16 are symmetrically distributed on the inner walls of the front and rear sides of the limiting hole, and the positioning grooves 16 are matched with the positioning block 14. The shape memory alloy sheet 17 is arc-shaped and is located between the two limiting blocks 15. The middle part of the shape memory alloy sheet 17 is fixedly connected to the inner wall of the positioning block 14. In the initial state, the two ends of the shape memory alloy sheet 17 are in close contact with the two limiting blocks 15. The cover plate 18 is detachably installed on the top of the positioning block 14;
[0040] When pinching the two pry bars 21 with the index finger and thumb, as the pry bars 21 freely deflect downward, when the pry bars 21 contact the push rod 8, the thrust of the pry bars 21 on the push rod 8 enables the movable block 7 to move in the direction close to the positioning block 14 and compress the telescopic rod 9 and the first return spring 10. As the movable block 7 moves, the movable block 7 can drive the connection part of the second movable rod 6 and the second clamping plate 19 to move away from the axis direction of the detection sleeve 1 together by pulling the second movable rod 6. When the two first clamping plates 4 are attached to the inner wall of the detection sleeve 1, the two second clamping plates 19 are also attached to the inner wall of the limiting ring 2. Then, the cable to be tested can be inserted into the detection sleeve 1. After the cable is inserted into the detection sleeve 1, release the two pry bars 21. At this time, the two pry bars 21 can gradually drive the two pressure bars 20 to reset under the action of the torsion spring, so as to clamp the insulating part of the cable through the two second clamping plates 19, and the two first clamping plates 4 can clamp the core part of the cable under the action of the reset assembly. And because the force generated by the second clamping plate 19 is greater than the force generated by the first pressing plate 23, the core of the cable is prevented from being damaged due to excessive pressure;
[0041] In addition, by setting a limit component, during the cable detection process, the cable may overheat due to over-detection. At this time, the heat generated by the cable can be sequentially transferred to the shape memory alloy sheet 17 through the first clamping plate 4, the first connecting wire 12, and the positioning block 14. Subsequently, both ends of the shape memory alloy sheet 17 can bend and deflect towards the middle. At this time, since the limiting block 15 is no longer blocked by the shape memory alloy sheet 17, the pulling force of the second return spring 11 on the positioning block 14 can cause the limiting block 15 to be received into the positioning block 14 under the action of the pressure of the inclined plane of the positioning groove 16. And as the second return spring 11 contracts, the second return spring 11 can pull the positioning block 14, the telescopic rod 9, and the movable block 7 to move together towards the detection line 3. With the movement of the movable block 7, the two first clamping plates 4 can be separated from the core part of the cable under the pulling force of the movable block 7 on the first movable rod 5 and the second movable rod 6, thereby avoiding damage to the cable caused by over-detection;
[0042] After the detection is completed, as the detection sleeve 1 is removed from the cable, when the temperature of the shape memory alloy sheet 17 drops, the shape memory alloy sheet 17 can gradually reset, pulling the movable block 7 through the push rod 8, so that the positioning block 14 can be reset under the pulling force of the movable block 7 on the telescopic rod 9. When the limiting block 15 moves to the position where the positioning groove 16 is located, the two limiting blocks 15 can be re-locked into the positioning groove 16 under the thrust of the shape memory alloy sheet 17, thereby realizing the locking of the position of the positioning block 14.
[0043] As Figure 1 shown, the pry bar 21 is insulated, and a pressing plate 23 is fixedly connected to the end of the pry bar 21 away from the limiting post 22, and the pressing plate 23 is coated with insulating rubber;
[0044] The presence of the pressing plate 23 can increase the contact area between the finger and the pry bar 21, so that the finger can better press the pry bar 21.
[0045] As Figure 2 and Figure 3 shown, a roller 24 is installed at the free end of the push rod 8, and the axis direction of the roller 24 is perpendicular to the plane where the two pry bars 21 are located;
[0046] By providing the roller 24, when the pry bar 21 presses the push rod 8, the roller 24 can roll along the pry bar 21, thereby reducing the friction between the pry bar 21 and the push rod 8, making the push rod 8 push the movable block 7 to compress the telescopic rod 9 more smoothly.
[0047] As Figure 2As shown, the first clamping plate 4 is arc-shaped, and the concave surface of the first clamping plate 4 faces the direction of the axis of the detection sleeve 1. One end of the first clamping plate 4 away from the detection line 3 is fixedly connected to a first guide plate 25, and one end of the first guide plate 25 away from the detection line 3 is inclined in the direction away from the axis of the detection sleeve 1;
[0048] The arc-shaped first clamping plate 4 can better fit with the core part of the cable, so as to ensure a stable electrical connection between the second clamping plate 19 and the cable. The first guide plate 25 can guide the end of the cable when the cable passes through between the two first clamping plates 4, avoiding the end of the cable being blocked by the first clamping plate 4 and improving the convenience of inserting the cable into the detection sleeve 1.
[0049] As Figure 1 and Figure 7 shown, the second clamping plate 19 is arc-shaped, and the concave surface of the second clamping plate 19 faces the direction of the axis of the limiting ring 2. One end of the second clamping plate 19 away from the detection line 3 is fixedly connected to a second guide plate 26, and one end of the second guide plate 26 away from the detection line 3 is inclined in the direction away from the axis of the limiting ring 2. A non-slip pattern is provided on the side of the second clamping plate 19 away from the pressing rod 20;
[0050] The arc-shaped second clamping plate 19 can better fit with the insulating skin part outside the cable, and then cooperate with the non-slip pattern on the second clamping plate 19 to improve the clamping effect of the second clamping plate 19 on the cable. The second guide plate 26 can guide the end of the cable when the cable passes through the limiting ring 2, improving the convenience of the cable passing through the limiting ring 2.
[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.
Claims
1. A withstand voltage test device for detecting cables, comprising an insulating detection sleeve (1), characterized in that: The open end of the detection sleeve (1) is connected with a limit ring (2), the end of the detection sleeve (1) far away from the opening is connected with a detection wire (3), strip-shaped limit holes are symmetrically arranged at the top and bottom of the detection sleeve (1), clamping devices are symmetrically arranged up and down inside the detection sleeve (1), the clamping device includes a first clamping plate (4), a first movable rod (5), a second movable rod (6), a movable block (7), a push rod (8) and a reset assembly, the reset assembly includes a telescopic rod (9), a first reset spring (10), a second reset spring (11), a first connecting wire (12), a second connecting wire (13), a positioning block (14) and a limit assembly, and the limit assembly includes two limit blocks (15), two positioning grooves (16), a shape memory alloy sheet (17) and a cover plate (18); one end of the first movable rod (5) far away from the detection wire (3) is hinged to the front and rear inner walls of the limit hole, one end of the second movable rod (6) far away from the detection wire (3) is hinged to the free end of the first movable rod, and the second movable rod (6) is closer to the detection wire (3) than the first movable rod (5), the first clamping plate (4) is hinged at the connection of the first movable rod (5) and the second movable rod (6), the other end of the second movable rod (6) is hinged to the movable block (7), the movable block (7) is slidably installed in the limit hole, the push rod (8) is fixedly connected to the side of the movable block (7) far away from the axis of the detection sleeve (1), and the free end of the push rod (8) is inclined in the direction away from the detection wire (3), fixed components are symmetrically arranged up and down inside the limit ring (2), and the fixed components include a second clamping plate (19), a pressing rod (20), a pry bar (21) and a limit post (22).
2. The withstand voltage test device for detecting cables according to claim 1, characterized in that: The positioning block (14) is located on the side of the movable block (7) close to the detection wire (3), both ends of the telescopic rod (9) are fixedly connected to the movable block (7) and the positioning block (14) respectively, the first reset spring (10) is sleeved on the telescopic rod (9), and both ends of the first reset spring (10) are fixedly connected to the fixed block (27) and the positioning block (14) respectively, both ends of the second reset spring (11) are fixedly connected to the positioning block (14) and the inner wall of the limit hole close to the detection wire (3) respectively, the first connecting wire (12) is connected between the positioning block (14) and the corresponding first clamping plate (4), and the second connecting wire (13) is connected between the detection wire (3) and the positioning block (14).
3. The withstand voltage test device for detecting cables according to claim 2, wherein: The two limiting blocks (15) are respectively slidably inserted into the front and rear sides of the positioning block (14). The limiting blocks (15) can be completely received into the positioning block (14). Both the limiting block (15) and the end of the positioning groove (16) close to the detection line (3) are designed with inclined surfaces. The two positioning grooves (16) are symmetrically distributed on the inner walls of the front and rear sides of the limiting hole, and the positioning groove (16) is matched with the positioning block (14). The shape memory metal sheet (17) is arc-shaped, and the shape memory metal sheet (17) is located between the two limiting blocks (15). The middle part of the shape memory metal sheet (17) is fixedly connected to the inner wall of the positioning block (14). In the initial state, the two ends of the shape memory metal sheet (17) are kept in close contact with the two limiting blocks (15). The cover plate (18) is detachably installed on the top of the positioning block (14).
4. The withstand voltage test device for detecting cables according to claim 1, characterized in that: The pressing rod (20) is vertically and fixedly connected to the side of the second clamping plate (19) away from the axis of the limiting ring (2). The free end of the pressing rod (20) is slidably inserted through the limiting ring (2). The limiting column (22) is inserted through the free end of the pressing rod (20) in the front-rear direction. The lever (21) is arranged at the free end of the pressing rod (20). The lever (21) is integrally V-shaped, and the convex part of the V-shape of the lever (21) is hinged to the surface of the detection sleeve (1) through a torsion spring. The force generated by the first return spring (10) on the first clamping plate (4) is less than the force generated by the torsion spring on the second clamping plate (19). A notch is provided at the position of the lever (21) close to the pressing rod (20). Through holes in the shape of strips matching the limiting column (22) are penetrated through the inner walls of the front and rear sides of the notch, and the two ends of the limiting column (22) are respectively slidably inserted into the two through holes.
5. The withstand voltage test device for detecting cables according to claim 4, characterized in that: The lever (21) is insulated. A pressing plate (23) is fixedly connected to the end of the lever (21) away from the limiting column (22), and the pressing plate (23) is coated with insulating rubber on the outside.
6. The withstand voltage test device for detecting cables according to claim 5, characterized in that: A roller shaft (24) is installed at the free end of the push rod (8), and the axis direction of the roller shaft (24) is perpendicular to the plane where the two levers (21) are located.
7. The voltage withstand test device for detecting cables according to claim 4, characterized in that: The first clamping plate (4) is arc-shaped, and the concave surface of the first clamping plate (4) faces the direction of the axis of the detection sleeve (1). A first guiding plate (25) is fixedly connected to the end of the first clamping plate (4) away from the detection line (3), and the end of the first guiding plate (25) away from the detection line (3) is inclined in the direction away from the axis of the detection sleeve (1).
8. The withstand voltage test device for detecting cables according to claim 7, characterized in that: The second clamping plate (19) is arc-shaped, and the concave surface of the second clamping plate (19) faces the direction of the axis of the limiting ring (2). A second guiding plate (26) is fixedly connected to the end of the second clamping plate (19) away from the detection line (3), and the end of the second guiding plate (26) away from the detection line (3) is inclined in the direction away from the axis of the limiting ring (2). Anti-slip lines are provided on the side of the second clamping plate (19) away from the pressing rod (20).
9. The withstand voltage test device for detecting cables according to claim 8, characterized in that: The limiting ring (2) is fixedly connected to the detection sleeve (1) through a plurality of fixing blocks (27), and the inner diameter of the limiting ring (2) is larger than the inner diameter of the detection sleeve (1).
Citation Information
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