Withstand voltage test device for detecting cable

Abstract

The invention belongs to the technical field of cable detection devices, and particularly relates to a withstand voltage test device for detecting a cable, which comprises an insulated detection sleeve, the open end of the detection sleeve is connected with a limiting ring, one end of the detection sleeve far away from the opening is connected with a detection line, and the top and the bottom of the detection sleeve are symmetrically provided with strip-shaped limiting holes. And clamping devices are symmetrically arranged on the inner side of the detection sleeve up and down. Compared with an existing wire clamp, due to the fact that the two first clamping plates achieve electric connection operation on the cable on the inner side of the detection sleeve, the risk of electric leakage possibly existing in an existing connection mode is avoided, the safety in the voltage withstanding test is improved, and due to the fact that when the cable is connected through the detection sleeve, the electric leakage is avoided. And the two second clamping plates can emphatically clamp and fix the insulating part of the cable, so that the cable core of the cable is prevented from being damaged due to large pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of cable detection devices, and in particular relates to a voltage withstand test device for detecting cables. Background Art

[0002] There may be some potential insulation defects in the cable during the manufacturing process, such as bubbles, impurities, cracks in the insulation layer, etc. In the long-term operation, the insulation performance will also deteriorate due to aging, moisture, etc. Therefore, it is necessary to use a withstand voltage test device to perform a withstand voltage test on the cable. The principle is to test the insulation reliability and tolerance of the cable under high voltage by applying a test voltage higher than its normal operating voltage to the cable.

[0003] The existing withstand voltage test device is mainly composed of a variable frequency power supply, an excitation transformer, a reactor and a voltage divider. During the test, the above devices need to be connected in sequence. After the connection is completed, the wire is used to connect the cable to be tested. When connecting the cable, in order to improve the efficiency and convenience of the connection, a wire clamp is generally used to clamp the cable to be tested. Although the wire clamp can realize the quick connection of the cable, it has the following shortcomings in actual use: First of all, the clamping position of the wire clamp is the core part of the cable. Since the edge of the clamp is narrow, it may not be clamped firmly. In addition, the withstand voltage test needs to be carried out for a long time, so repeated clamping operations will damage the core of the cable. Secondly, since the position where the wire clamp is clamped to the cable lacks protection and is in an exposed device, there may be a risk of leakage when it is used or removed. Summary of the invention

[0004] 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 technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A withstand voltage test device for detecting cables, comprising an insulating detection sleeve, an open end of the detection sleeve is connected to a limit ring, an end of the detection sleeve away from the opening is connected to a detection line, the top and bottom of the detection sleeve are symmetrically provided with strip-shaped limit holes, the inner side of the detection sleeve is symmetrically provided with a clamping device, and the clamping device comprises a first clamping plate, a first movable rod, a second movable rod, a movable block, a push rod and a reset assembly; One end of the first movable rod away from the detection line is hinged to the front and rear inner walls of the limiting 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 limiting hole, the push rod is fixedly connected to the 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, and the fixing components are symmetrically arranged in the upper and lower parts of the limiting ring.

[0006] Furthermore, the reset assembly includes a telescopic rod, a first reset spring, a second reset spring, a first connecting line, a second connecting line, a positioning block and a limit assembly; The positioning block is located on a 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 return spring is sleeved on the telescopic rod, and the two ends of the first return spring are respectively fixedly connected to the fixed block and the positioning block, the two ends of the second return spring are respectively fixedly connected to the positioning block and the inner wall of the limiting hole close to one end of the detection line, the first connecting line is connected between the positioning block and the corresponding first clamping plate, and the second connecting line is connected between the detection line and the positioning block.

[0007] Furthermore, the limiting assembly includes two limiting blocks, two positioning grooves, a memory metal sheet and a cover plate; The two limit blocks are respectively slidably inserted in the front and rear sides of the positioning block, the limit block can be completely received in the positioning block, and the limit block and the end of the positioning groove close to the detection line are both inclined, the two positioning grooves are symmetrically distributed on the front and rear inner walls of the limit hole, and the positioning groove matches the positioning block, the memory metal sheet is arc-shaped, and the memory metal sheet is located between the two limit blocks, the middle part of the memory metal sheet is fixedly connected to the inner wall of the positioning block, and in the initial state, the two ends of the memory metal sheet are kept tightly against the two limit blocks, and the cover plate is detachably installed on the top of the positioning block.

[0008] Furthermore, the fixing assembly includes a second clamping plate, a pressure rod, a pry rod and a limiting column; The pressure rod is vertically fixedly connected to the side of the second clamping plate away from the axis of the limiting ring, the free end of the pressure rod is slidably penetrated and inserted into the limiting ring, the limiting column is penetrated and inserted into the free end of the pressure rod from the front-to-back direction, the pry bar is arranged at the free end of the pressure rod, the pry bar is V-shaped as a whole, 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, the pry bar is provided with a notch near one end of the pressure rod, and the front and rear inner walls of the notch are penetrated with a strip-shaped guide hole matching the limiting column, and the two ends of the limiting column are respectively slidably inserted into the two guide holes.

[0009] Furthermore, the pry bar is insulated, one end of the pry bar away from the limiting column is fixedly connected to a pressing plate, and the pressing plate is coated with insulating rubber.

[0010] 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.

[0011] Furthermore, the first clamping plate is arc-shaped, and the concave surface of the first clamping plate is opposite to the axis of the detection sleeve. The end of the first clamping plate away from the detection line is fixedly connected to the first guide plate, and the end of the first guide plate away from the detection line is inclined in the direction away from the axis of the detection sleeve.

[0012] Furthermore, the second clamping plate is arc-shaped, and the concave surface of the second clamping plate is opposite to the direction of the axis of the limiting ring. The end of the second clamping plate away from the detection line is fixedly connected to the second guide plate, and the end of the second guide plate away from the detection line is inclined in the direction away from the axis of the limiting ring. The side of the second clamping plate away from the pressure rod is provided with anti-slip grooves.

[0013] 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.

[0014] Technical effects and advantages of the present invention: 1. Compared with the existing wire clamp, the present invention realizes the electrical connection operation of the cable on the inner side of the detection sleeve, thereby avoiding the risk of leakage in the existing connection mode and improving the safety during the withstand voltage test. In addition, when the cable is connected through the detection sleeve, the two second clamps can focus on clamping and fixing the insulating part of the cable, thereby avoiding the damage of the cable core due to the large pressure. 2. The present invention provides a limit assembly. During the cable detection process, when the cable overheats due to excessive detection, the heat generated by the cable can be transferred to the memory metal sheet through the first clamping plate, the first connecting line and the positioning block in sequence, so that the two ends of the memory metal sheet can be bent and deflected toward the middle and release the restriction on the limit block. Subsequently, as the second reset 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

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a three-dimensional cross-sectional view of the detection sleeve of the present invention; Figure 3 It is a three-dimensional schematic diagram of the first return spring, the telescopic rod, the movable block, the push rod and the roller shaft in the present invention; Figure 4 It is a three-dimensional schematic diagram of the positioning block, the limiting block and the memory metal sheet in the present invention; Figure 5 It is a three-dimensional schematic diagram of the detection sleeve and the second return spring in the present invention; Figure 6 The present invention Figure 5 A magnified view of part A; Figure 7 It 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.

[0016] In the figure: 1. detection sleeve; 2. limit ring; 3. detection line; 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 line; 13. second connecting line; 14. positioning block; 15. limit block; 16. positioning groove; 17. memory metal sheet; 18. cover plate; 19. second clamping plate; 20. pressure rod; 21. pry bar; 22. limit column; 23. pressure plate; 24. roller; 25. first guide plate; 26. second guide plate; 27. fixing block. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides Figures 1 to 7 A withstand voltage test device for a detection cable shown in the figure comprises an insulating detection sleeve 1, an open end of the detection sleeve 1 is connected to a limit ring 2, an end of the detection sleeve 1 away from the opening is connected to a detection line 3, the top and bottom of the detection sleeve 1 are symmetrically provided with strip-shaped limit holes, and the inner side of the detection sleeve 1 is symmetrically provided with a clamping device, which comprises 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; One end of the first movable rod 5 away from the detection line 3 is hinged to the front and rear inner walls of the limiting hole, one end of the second movable rod 6 away from the detection line 3 is hinged to the free end of the first movable rod, and the second movable rod 6 is closer to the detection line 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 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 line 3, the limiting ring 2 is symmetrically arranged with fixing components in the upper and lower parts, 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; The fixing assembly includes a second clamping plate 19, a pressure rod 20, a prying rod 21 and a limiting column 22, the pressure rod 20 is vertically 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 pressure rod 20 is slidably penetrated and inserted into the limiting ring 2, the limiting column 22 is penetrated and inserted into the free end of the pressure rod 20 from the front and rear directions, the prying rod 21 is arranged at the free end of the pressure rod 20, the prying rod 21 is V-shaped as a whole, and the V-shaped convex part of the prying rod 21 is hinged to the surface of the detection sleeve 1 through a torsion spring, and 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, the prying rod 21 is provided with a notch at a position close to one end of the pressure rod 20, and the front and rear inner walls of the notch are penetrated with a strip-shaped guide hole matching the limiting column 22, and the two ends of the limiting column 22 are respectively slidably inserted into the two guide holes; When connecting the cable, hold the detection sleeve 1, and use the index finger and thumb to pinch the free ends of the two pry bars 21 respectively, so that the other end of the pry bar 21 can push the limit column 22 upward through the inner wall of the bottom of the guide hole, so that the pressure rod 20 pulls the second clamping plate 19 to move away from the axis of the limit ring 2 under the drive of the limit column 22, and as the pry bar 21 gradually deflects downward freely, 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 in the direction close to the positioning block 14, and 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 together in the direction away from the axis of the detection sleeve 1. When the two first clamping plates 4 are fitted with the inner wall of the detection sleeve 1, the two second clamping plates 19 also keep fitting with the inner wall of the limiting ring 2, and then the cable to be detected is inserted from the limiting ring 2 into the detection sleeve 1 in sequence. During the cable insertion process, the insertion depth of the cable can be observed through the gap between the two adjacent fixing 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 limiting ring 2, the two pry bars 21 are released. 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 that the insulating part of the cable is clamped by 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 component, and then cooperate with the two second clamping plates 19 to improve the stability of the cable connection; In addition, compared with the existing wire clamps, since the two first clamps 4 are on the inner side of the detection sleeve 1 to realize the electrical connection operation of the cable, the risk of leakage in the existing connection method is avoided, and the safety during the voltage resistance test is improved.

[0019] like Figures 2 to 6 As shown, the reset assembly includes a telescopic rod 9, a first reset spring 10, a second reset spring 11, a first connecting line 12, a second connecting line 13, a positioning block 14 and a limiting assembly, wherein the positioning block 14 is located on the side of the movable block 7 close to the detection line 3, and the two ends of the telescopic rod 9 are respectively fixedly connected to the movable block 7 and the positioning block 14, the first reset spring 10 is sleeved on the telescopic rod 9, and the two ends of the first reset spring 10 are respectively fixedly connected to the fixed block 27 and the positioning block 14, the two ends of the second reset spring 11 are respectively fixedly connected to the positioning block 14 and the inner wall of the limiting 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 splint 4, and the second connecting line 13 is connected between the detection line 3 and the positioning block 14.

[0020] The limit assembly includes two limit blocks 15, two positioning grooves 16, a memory metal sheet 17 and a cover plate 18. The two limit blocks 15 are respectively slidably inserted in the front and rear sides of the positioning block 14, and the limit block 15 can be completely received in the positioning block 14. The limit block 15 and the end of the positioning groove 16 close to the detection line 3 are both inclined. The two positioning grooves 16 are symmetrically distributed on the inner walls of the front and rear sides of the limit hole, and the positioning groove 16 matches the positioning block 14. The memory metal sheet 17 is arc-shaped, and the memory metal sheet 17 is located between the two limit blocks 15. The middle part of the memory metal sheet 17 is fixedly connected to the inner wall of the positioning block 14, and in the initial state, the two ends of the memory metal sheet 17 are kept in close contact with the two limit blocks 15, and the cover plate 18 is detachably installed on the top of the positioning block 14; When the index finger and thumb are used to pinch the two pry bars 21, as the pry bars 21 freely deflect downward, when the pry bars 21 come into contact with the push rod 8, the thrust of the pry bars 21 on the push rod 8 enables the movable block 7 to move toward 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 of the second movable rod 6 and the second clamping plate 19 to move away from the axial direction of the detection sleeve 1 through the pulling force on 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 Keep in contact with the inner wall of the limit ring 2, and then the cable to be tested can be inserted into the detection sleeve 1. After the cable is inserted into the detection sleeve 1, the two pry bars 21 are loosened. 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 that the insulation part of the cable is clamped by 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 component. Because the force generated by the second clamping plate 19 is greater than the force generated by the first pressure plate 23, the cable core is prevented from being damaged due to the large pressure. In addition, by setting a limit position component, during the cable detection process, the cable may be overheated due to excessive detection. At this time, the heat generated by the cable can be transferred to the memory metal sheet 17 through the first clamping plate 4, the first connecting line 12 and the positioning block 14 in sequence. Subsequently, the two ends of the memory metal sheet 17 can be bent and deflected toward the middle. At this time, since the limit block 15 is no longer blocked by the memory metal sheet 17, the pulling force of the second return spring 11 on the positioning block 14 can make the limit block 15 be retracted into the positioning block 14 under the pressure of the inclined surface 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 together to move in the direction close to the detection line 3, and as the movable block 7 moves, 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 excessive detection; When the detection is completed, as the detection sleeve 1 is removed from the cable, when the temperature of the memory metal sheet 17 drops, the memory metal sheet 17 can gradually reset, and the push rod 8 pulls the movable block 7, so that the positioning block 14 can be reset under the pulling force of the movable block 7 on the telescopic rod 9, and when the limit block 15 moves to the position of the positioning groove 16, the two limit blocks 15 can be re-stuck into the positioning groove 16 under the pushing force of the memory metal sheet 17, thereby locking the position of the positioning block 14.

[0021] like Figure 1 As shown, the pry bar 21 is insulated, and one end of the pry bar 21 away from the limiting column 22 is fixedly connected to a pressing plate 23, and the pressing plate 23 is covered with insulating rubber; 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 .

[0022] like Figure 2 and Figure 3 As shown, 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 pry bars 21 are located; By providing the roller 24 , when the pry bar 21 squeezes the push rod 8 , the roller 24 can roll against the pry bar 21 , thereby reducing the friction between the pry bar 21 and the push rod 8 , so that the push rod 8 can push the movable block 7 to compress the telescopic rod 9 more smoothly.

[0023] like Figure 2 As shown, the first clamping plate 4 is arc-shaped, and the concave surface of the first clamping plate 4 is directly opposite to the direction of the axis of the detection sleeve 1, and the end of the first clamping plate 4 away from the detection line 3 is fixedly connected to the first guide plate 25, and the 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; The arc-shaped first clamping plate 4 can better fit with the core part of the cable, thereby ensuring a stable electrical connection between the second clamping plate 19 and the cable, and the first guide plate 25 can guide the end of the cable when the cable passes between the two first clamping plates 4, avoiding the end of the cable from being blocked by the first clamping plate 4, thereby improving the convenience of inserting the cable into the detection sleeve 1.

[0024] like Figure 1 and Figure 7 As shown, the second clamping plate 19 is arc-shaped, and the concave surface of the second clamping plate 19 is directly opposite to the direction of the axis of the limiting ring 2. The end of the second clamping plate 19 away from the detection line 3 is fixedly connected to the second guide plate 26, and the 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. The side of the second clamping plate 19 away from the pressure rod 20 is provided with anti-slip grooves; The arc-shaped second clamping plate 19 can better fit with the insulating skin part on the outside of the cable, and then cooperate with the anti-slip grooves on the second clamping plate 19 to improve the clamping effect of the second clamping plate 19 on the cable, while the second guide plate 26 can guide the end of the cable when the cable passes through the limit ring 2, thereby improving the convenience of the cable passing through the limit ring 2.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A voltage withstand test device for detecting a cable, comprising an insulating detection sleeve (1), characterized in that: The open end of the detection sleeve (1) is connected to a limit ring (2), the end of the detection sleeve (1) away from the opening is connected to a detection line (3), the top and bottom of the detection sleeve (1) are symmetrically provided with strip-shaped limit holes, and the inner side of the detection sleeve (1) is symmetrically provided with a clamping device, the clamping device comprising 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 end of the first movable rod (5) away from the detection line (3) is hinged to the front and rear inner walls of the limit hole, and the end of the second movable rod (6) away from the detection line (3) is hinged to the front and rear inner walls of the limit hole. The first movable rod (4) is hinged to the free end of the first movable rod (5), and the second movable rod (6) is closer to the detection line (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 a side of the movable block (7) away from the axis of the detection sleeve (1), and the free end of the push rod (8) is inclined in a direction away from the detection line (3). Fixed components are symmetrically arranged in the limiting ring (2) from top to bottom.

2. The withstand voltage test device for detection cables according to claim 1, characterized in that: The reset assembly comprises a telescopic rod (9), a first reset spring (10), a second reset 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 a side of the movable block (7) close to the detection line (3); two ends of the telescopic rod (9) are respectively fixedly connected to the movable block (7) and the positioning block (14); the first reset spring (10) is sleeved on the telescopic rod (9); two ends of the first reset spring (10) are respectively fixedly connected to the fixed block (27) and the positioning block (14); two ends of the second reset spring (11) are respectively fixedly connected to the positioning block (14) and the inner wall of the limiting 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); and the second connecting line (13) is connected between the detection line (3) and the positioning block (14).

3. The withstand voltage test device for detection cables according to claim 2, characterized in that: The limit assembly comprises two limit blocks (15), two positioning grooves (16), a memory metal sheet (17) and a cover plate (18); the two limit blocks (15) are respectively slidably inserted into the front and rear sides of the positioning block (14); the limit block (15) can be completely received in the positioning block (14); and the end of the limit block (15) and the positioning groove (16) close to the detection line (3) are both designed with inclined surfaces; the two positioning grooves (16) are symmetrically distributed on the front and rear inner walls of the limit hole, and the positioning grooves (16) match the positioning block (14); the memory metal sheet (17) is arc-shaped, and the memory metal sheet (17) is located between the two limit blocks (15); the middle part of the memory metal sheet (17) is fixedly connected to the inner wall of the positioning block (14); and in the initial state, the two ends of the memory metal sheet (17) are kept in close contact with the two limit blocks (15); and the cover plate (18) is detachably mounted on the top of the positioning block (14).

4. The withstand voltage test device for detection cables according to claim 1, characterized in that: The fixing assembly comprises a second clamping plate (19), a pressure rod (20), a prying rod (21) and a limiting column (22); the pressure rod (20) is vertically fixedly connected to a side of the second clamping plate (19) away from the axis of the limiting ring (2); the free end of the pressure rod (20) is slidably inserted into the limiting ring (2); the limiting column (22) is inserted into the free end of the pressure rod (20) from the front-back direction; the prying rod (21) is arranged at the free end of the pressure rod (20); and the prying rod (21) is V-shaped as a whole. The V-shaped protrusion of the pry bar (21) is hinged to the surface of the detection sleeve (1) through a torsion spring, and the force generated by the first return spring (10) on the first clamping plate (4) is smaller than the force generated by the torsion spring on the second clamping plate (19). The pry bar (21) is provided with a notch at a position close to one end of the pressure bar (20), and the inner walls of the front and rear sides of the notch are penetrated by strip-shaped guide holes matching the limit column (22), and the two ends of the limit column (22) are respectively slidably inserted into the two guide holes.

5. The withstand voltage test device for detection cables according to claim 4, characterized in that: The pry bar (21) is insulated, and one end of the pry bar (21) away from the limiting column (22) is fixedly connected to a pressing plate (23), and the pressing plate (23) is coated with insulating rubber.

6. The withstand voltage test device for detection cables according to claim 5, characterized in that: A roller shaft (24) is mounted on the free end of the push rod (8), and the axial direction of the roller shaft (24) is perpendicular to the plane where the two pry bars (21) are located.

7. The withstand voltage test device for detection 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) is directly opposite to the direction of the axis of the detection sleeve (1); the end of the first clamping plate (4) away from the detection line (3) is fixedly connected to the first guide plate (25), and the end of the first guide plate (25) away from the detection line (3) is inclined in a direction away from the axis of the detection sleeve (1).

8. The withstand voltage test device for detection 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) is directly opposite to the direction of the axis of the limiting ring (2); the end of the second clamping plate (19) away from the detection line (3) is fixedly connected to the second guide plate (26), and the end of the second guide plate (26) away from the detection line (3) is inclined in a direction away from the axis of the limiting ring (2); and the side of the second clamping plate (19) away from the pressure rod (20) is provided with anti-slip grooves.

9. The withstand voltage test device for detection cables according to claim 8, characterized in that: The limiting ring (2) is fixedly connected to the detection sleeve (1) via a plurality of fixing blocks (27), and the inner diameter of the limiting ring (2) is greater than the inner diameter of the detection sleeve (1).

Images