Withstand voltage detection equipment for pole-mounted circuit breaker

Abstract

The invention relates to a withstand voltage detection device for a pole-mounted circuit breaker, and relates to the technical field of detection devices, the withstand voltage detection device comprises a base station and a substrate located above the base station, the base station is provided with an adjusting assembly for driving the substrate to be adjusted horizontally and vertically, the substrate is hinged with a plurality of insulating rods and detection contact pieces fixedly arranged at one ends of the insulating rods, and the insulating rods are hinged with the detection contact pieces. A cable of which one end is connected with the detection contact piece is arranged above the base station, and a power piece for driving the insulating rod to rotate in a reciprocating manner is arranged on the side surface of the substrate; a supporting frame is fixedly arranged above the substrate, an insulating column is fixedly arranged on the upper side surface of the supporting frame, a connecting plate is fixedly arranged at the upper end part of the insulating column, and a cable connected with the detection contact is wound and fixed on the connecting plate; in the application, the insulating columns and the connecting plate are arranged on the supporting frame above the substrate, and the cable connected with the detection contact is wound and fixed on the connecting plate, so that the problem of staggered winding of the cable is effectively solved, and the corresponding safety performance is improved.

Description

Technical Field

[0001] The present application relates to a withstand voltage detection device for a pole-mounted circuit breaker, and in particular to a withstand voltage detection device. Background Art

[0002] As core components in power systems, pole-mounted circuit breakers play a critical role in controlling, protecting, and isolating circuits, making them crucial for maintaining stable power system operation. In complex substation environments and across extensive distribution lines, pole-mounted circuit breakers effectively protect against a variety of power anomalies, including overloads, short circuits, and ground faults, ensuring the safe transmission and distribution of electrical energy. However, in actual operation, pole-mounted circuit breakers also face multiple challenges, including fluctuating electrical loads and harsh environmental factors. These factors can cause equipment leakage and insulation degradation, leading to equipment failures and even safety accidents.

[0003] Given the importance of pole-mounted circuit breakers in power systems and their potential operational risks, it is particularly important to conduct regular and effective withstand voltage tests on them. Currently, there are invention patents on the market with publication number 202021122523.0, which propose an automatic withstand voltage test device for circuit breakers. The device integrates functional modules such as withstand voltage testing, fixing, grounding, transportation, and control, aiming to realize the automated testing process of circuit breakers. Among them, the withstand voltage test contact is a key component. By connecting with the plum blossom contact on the circuit breaker, a high-voltage test is performed to verify the insulation performance of the circuit breaker.

[0004] However, in practice, the spacing between adjacent plum blossom contacts varies between different sizes of pole-mounted circuit breakers. This necessitates matching withstand voltage testing equipment with corresponding specifications, significantly reducing the efficiency of withstand voltage testing and severely limiting the versatility and practicality of the equipment, leaving room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a withstand voltage detection device for a pole-mounted circuit breaker to solve the problem of poor versatility and practicality of the withstand voltage test device in the above-mentioned related art.

[0006] The present application provides a voltage withstand test device for a pole-mounted circuit breaker using the following technical solution: The cam is fixed on the upper end of the support frame, and the cam is fixed on the upper end of the support frame to the upper end of the support frame, and the cam is fixed on the upper end of the support frame to the upper end of the support frame.

[0007] By adopting the above technical solution, the adjustment component on the base can drive the base plate to adjust in the horizontal and vertical directions, and can flexibly adapt to the problem of different spacing between adjacent plum blossom contacts of pole-mounted circuit breakers of different specifications, so that the detection contacts are accurately aligned with the detection point, without the need to equip a variety of corresponding specifications of devices, thereby improving the efficiency of the withstand voltage test. The support slider sliding on the base plate is connected to the insulating rod through an extension rod. The support slider can be slid to adjust the position and locked by a locking member, further enhancing the adaptability of the equipment to circuit breakers of different specifications. At the same time, the cable winding is fixed on the connecting plate and can move synchronously during the adjustment process of the base plate, reducing the risk of cable intertwining and ensuring smooth detection. The overall design enables the equipment to meet the withstand voltage detection needs of pole-mounted circuit breakers of various specifications, effectively solving the problem of poor versatility and practicality of withstand voltage test equipment in related technologies, and providing reliable detection guarantees for the stable operation of the power system.

[0008] Optionally, the adjustment assembly includes an adjustment plate, a first adjustment bolt and a second adjustment bolt, the adjustment plate is slidably mounted on the upper side of the base, a plurality of guide rods are fixed on the adjustment plate, and a guide through hole for the guide rods to pass through is opened on the base plate; a second adjustment block is fixed on the adjustment plate, and a first adjustment block located on one side of the second adjustment block is fixed on the base plate, the first adjustment bolt is used to adjust the distance between the first adjustment block and the second adjustment block, and the second adjustment bolt is used to tighten the connection between the guide rod and the base plate.

[0009] By adopting the above technical solution, when adjusting the installation height of the baseplate, loosening the second adjustment bolt can release the lock on the guide rod. The baseplate can now slide freely along the guide rod, allowing the operator to easily and intuitively adjust the baseplate height as needed to adapt to the testing requirements of pole-mounted circuit breakers of different specifications. After the height is adjusted to the desired level, tightening the second adjustment bolt can quickly and firmly fix the connection between the baseplate and the guide rod, ensuring the stability of the baseplate during the testing process and preventing the impact of height deviation or shaking on the docking accuracy of the detection contact piece and the circuit breaker contact.

[0010] Optionally, the locking member includes a receiving frame, a locking rod, a crank and a handle, the receiving frame is fixed on the vertical side of the positioning block away from the supporting slider, and the receiving frame is provided with a receiving through hole for the locking rod to pass through in the vertical direction; one end of the handle is rotatably connected to the receiving frame, one end of the crank is hinged to the outer edge of the handle, and the other end of the crank is hinged to the lower end of the locking rod; when the handle rotates, the locking rod is driven to slide back and forth up and down by the crank, and the lower end of the locking rod can be tightly pressed against the side surface of the base.

[0011] By adopting the above technical solution, this locking design based on the linkage of the handle, crank and locking rod provides efficient and reliable stability for the equipment. The operator only needs to easily turn the handle, and with the help of the transmission effect of the crank, the locking rod can slide up and down accurately in the vertical direction, locking and unlocking the support slider in an intuitive and convenient way. The whole process is simple and smooth, which greatly reduces the difficulty and time cost of operation and significantly improves the operating efficiency of the equipment. When the lower end of the locking rod is tightly pressed against the side of the base, a stable and reliable mechanical locking structure will be formed, which effectively resists factors such as vibration and external force interference that may occur during the detection process, and eliminates accidental sliding of the support slider from the root.

[0012] Optionally, a mounting plate is fixed on the upper side surface of the support slider, and an upper contact switch located above the extension rod is fixed on the mounting plate; a mounting frame is fixed on the side of the support slider away from the locking member, and a lower contact switch located below the extension rod is fixed on the mounting frame; the extension rod can trigger the upper contact switch by rotating upward, and can trigger the lower contact switch by rotating downward.

[0013] By adopting the above technical solution, when the detection contact piece accurately connects to the circuit breaker contact, the upper contact switch is immediately triggered and sends a signal to the control system, and the system automatically starts the test program, eliminating the tedious steps of manual judgment and manual operation; after the test is completed, the lower contact switch responds and sends feedback signals in a timely manner, and the control system quickly executes the stop test and power-off instructions to ensure safe and orderly operation. This automated control mode not only greatly improves test efficiency and shortens the detection cycle, but also effectively avoids the risks of misjudgment and false contact that may occur during manual operation, ensuring the accuracy and reliability of test results from the source, enabling the equipment to stably and efficiently serve the withstand voltage testing of pole-mounted circuit breakers.

[0014] Optionally, the power member is a power cylinder, the lower end of the power cylinder is hinged to the lower part of the mounting frame, and the upper end of the power cylinder is hinged to the outer peripheral surface of the extension rod.

[0015] By employing this technical solution, the power cylinder provides stable and controllable power for the rotation of the extension rod (and the connected insulating rod and detection contacts). This power source offers smooth output and rapid response, ensuring that the detection contacts connect accurately and quickly to the circuit breaker contacts, thereby improving testing efficiency and accuracy.

[0016] Optionally, a protective assembly is provided above the base, and the protective assembly includes a plurality of first support rods, second support rods and protective curtains, the number of the first support rods and the second support rods is the same as the number of the insulating rods, and a supporting cross plate is fixedly provided on the side of the support frame close to the extension rod; the two ends of the first support rod are respectively hinged to the end of the second support rod and the side of the supporting cross plate, and the other end of the second support rod is hinged to the outer peripheral surface of the insulating rod; the hinge point of the first support rod and the second support rod protrudes upward, and the two opposite side surfaces of the protective curtain are detachably connected to the side surfaces of adjacent first support rods and adjacent second support rods that are close to each other.

[0017] By adopting the above technical solution, the provision of the protective curtain can provide additional safety protection for the operator during the test process, preventing injuries caused by arcs, splashes, etc. generated during the test process.

[0018] Optionally, a plurality of hooks are fixedly provided on opposite side edges of the protective curtain, and a snap ring for the hooks to be engaged is fixedly provided on the first support rod and the second support rod.

[0019] By adopting this technical solution, the combination of hooks and rings allows the curtain to be quickly and easily installed on the first and second poles, and also easily removed. This design greatly improves efficiency during the test preparation and finalization phases, reducing operator workload.

[0020] Optionally, an arc-shaped rod is fixedly provided on the upper edge of the end of the first support rod close to the second support rod, and both ends of the arc-shaped rod are bent upwards. The arc-shaped rod can limit the cable connected to the detection contact piece.

[0021] By adopting the above technical solution, the curved rod design effectively limits the position of the cable connected to the detection contacts. During the test process, the cable may wobble or shift due to external forces or its own weight. The presence of the curved rod effectively prevents this from happening, ensuring that the cable remains stable. The curved rod not only serves as a limiter but also enhances the stability of the entire device to a certain extent. When the cable is restrained by the curved rod, the impact of any wobble or shift on the overall stability of the device is greatly reduced, thereby improving the safety and reliability of the test process.

[0022] Optionally, a locking plate and a butterfly bolt are provided above the arc rod, one end of the locking plate is hinged to one end of the arc rod, and the other end of the locking plate is detachably connected to the other end of the arc rod through the butterfly bolt.

[0023] The combination of the locking plate and butterfly bolt makes cable securing quick and easy. Operators simply place the cable on the curved rod and then rotate the butterfly bolt to secure the other end of the locking plate to the curved rod, securing the cable in place. Similarly, to release the cable, simply reverse the butterfly bolt to easily remove the locking plate.

[0024] In summary, this application has the following beneficial technical effects: The adjustment assembly on the baseplate drives the baseplate for horizontal and vertical adjustment, flexibly adapting to the differences in spacing between adjacent plum blossom contacts on pole-mounted circuit breakers of different specifications. This allows the detection contacts to be precisely aligned with the test point, eliminating the need for multiple devices of corresponding specifications and improving the efficiency of withstand voltage testing. The support slider sliding on the baseplate is connected to the insulating rod via an extension rod. The support slider can be adjusted in position and locked by a locking member, further enhancing the device's adaptability to circuit breakers of different specifications. At the same time, the cables are wound and fixed on the connecting plate, allowing them to move synchronously during the baseplate adjustment process, reducing the risk of cable entanglement and ensuring smooth testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 This is a partial structural diagram of the installation and coordination of the detection assembly in Example 1 of the present application; Figure 3 This is a partial structural diagram of the installation and coordination of the adjustment assembly according to Example 1 of the present application; Figure 4 This is a partial structural diagram of the installation and coordination of the supporting slider in Example 1 of the present application; Figure 5 This is a schematic structural diagram of the assembly and cooperation of the locking member in Example 1 of the present application; Figure 6 This is a partial structural diagram of the installation and coordination of the power component in Example 1 of the present application; Figure 7 This is a partial structural diagram of the installation and coordination of the protective assembly according to Example 2 of the present application; Figure 8 This is a schematic diagram of the structure of the protective curtain installation and coordination embodiment 2 of the present application; Figure 9 yes Figure 8 A magnified schematic diagram of part A; Figure 10 It is a schematic diagram of the partial cross-sectional structure of the installation and cooperation of the fixing parts in Example 2 of the present application.

[0027] In the figure, 1, base; 11, first adjustment block; 12, I-shaped slide rail; 13, support slider; 14, extension rod; 15, positioning block; 16, mounting plate; 17, upper contact switch; 18, mounting frame; 19, lower contact switch; 2, base plate; 21, support frame; 211, support cross plate; 22, insulating column; 23, connecting plate; 3, adjustment assembly; 31, adjustment plate; 311, guide rod; 312, second adjustment block; 32, first adjustment bolt; 33, second adjustment bolt Joint bolt; 4. Detection assembly; 41. Insulation rod; 42. Detection contact piece; 43. Cable; 44. Power part; 441. Power cylinder; 5. Locking part; 51. Receiver frame; 511. Receiver through hole; 52. Locking rod; 53. Crank; 54. Handle; 6. Protection assembly; 61. First support rod; 611. Snap ring; 612. Arc rod; 62. Second support rod; 63. Protection curtain; 631. Hook; 7. Fixing part; 71. Locking plate; 72. Butterfly bolt. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0029] Example 1: Reference Figure 1 and Figure 2A withstand voltage test device for a pole-mounted circuit breaker includes a base 1, a test assembly 4, and a base plate 2 located above the base 1. The base 1 is provided with an adjustment assembly 3 for driving the base plate 2 to adjust horizontally and vertically. The test assembly 4 includes three groups of insulating rods 41 hinged to the base plate 2 and a test contact piece 42 fixed to one end of the insulating rod 41. A cable 43 is provided above the base 1 with one end connected to the test contact piece 42. A power piece 44 is provided on the side of the base plate 2 to drive the insulating rod 41 to reciprocate. A support frame 21 is fixed above the base plate 2 by screws. An insulating column 22 is fixed to the upper side of the support frame 21, and a connecting plate 23 is fixed to the upper end of the insulating column 22. Three cables 43 connected to the three test contacts 42 are wound and fixed on the connecting plate 23. When the adjustment component 3 drives the base plate 2 to move and adjust, the support frame 21 and the insulating column 22 move synchronously with it. At this time, the three cables 43 located above the base 1 move partially synchronously, thereby reducing the possibility of the three cables 43 being intertwined or entangled with each other. When performing a withstand voltage test, the position of the base plate 2 is first accurately adjusted by the adjustment component 3, and then the power member 44 is activated to rotate the test contact 42 to the incoming or outgoing terminal of the column-mounted circuit breaker. This device can be used in combination to comprehensively test the withstand voltage performance of pole-mounted circuit breakers, including the withstand voltage between the three phases, between the incoming and outgoing terminals, and between the three phases and the housing. In particular, when testing the withstand voltage between the three phases and the housing, ensure that the transformer is grounded.

[0030] Reference Figure 3 The adjustment assembly 3 includes an adjustment plate 31, two first adjustment bolts 32 and two second adjustment bolts 33, wherein the adjustment plate 31 is slidably mounted on the upper side of the base 1, and four guide rods 311 are fixedly mounted on the four corners of the upper side of the adjustment plate 31, and a guide through hole for the guide rods 311 to pass through is opened on the base plate 2; The second adjusting bolt 33 is used to tighten the connection between the guide rod 311 and the base plate 2. When adjusting the installation height of the base plate 2, first loosen the second adjusting bolt 33 to release the lock on the guide rod 311, then adjust the height of the base plate 2, and finally tighten the second adjusting bolt 33 to adjust the installation height of the base plate 2.

[0031] A second adjusting block 312 is fixedly provided on the adjusting plate 31, and a first adjusting block 11 is fixedly provided on the base 1 and is located on one side of the second adjusting block 312. An adjusting through hole is provided on the first adjusting block 11, and an adjusting screw hole is provided on the second adjusting block 312. The first adjusting bolt 32 passes through the adjusting through hole and is screwed into and passes through the adjusting screw hole, and then the first adjusting bolt 32 and the first adjusting block 11 are relatively fixed by a nut; the user can adjust the distance between the first adjusting block 11 and the second adjusting block 312 by rotating the first adjusting bolt 32, and adjust the horizontal position of the adjusting plate 31 and the base plate 2.

[0032] Reference Figure 4 and Figure 5 , three supporting sliders 13 corresponding to the insulating rods 41 are slidably provided on the upper side of the substrate 2, an I-shaped slide rail 12 is fixed on the substrate 2, and a slide groove for slidingly cooperating with the I-shaped slide rail 12 is opened on the lower side of the supporting slider 13. The three supporting sliders 13 are installed on the I-shaped slide rail 12 along a straight line direction, thereby realizing a sliding connection between the supporting slider 13 and the substrate 2; An extension rod 14 is hinged on the support slider 13, and the end of the insulating rod 41 away from the detection contact piece 42 is coaxially fixedly connected to the end of the extension rod 14 away from the support slider 13. A positioning block 15 is fixed on the support slider 13, and a locking member 5 is provided on the positioning block 15 for slidingly locking the support slider 13.

[0033] Reference Figure 4 and Figure 5 The locking member 5 includes a receiving frame 51, a locking rod 52, a crank 53 and a handle 54, wherein the receiving frame 51 is fixed to the vertical side surface of the positioning block 15 away from the support slider 13 by screws, and a receiving through hole 511 for the locking rod 52 to pass through in the vertical direction is opened on the receiving frame 51; one end of the handle 54 is rotatably connected to the receiving frame 51, one end of the crank 53 is hinged to the outer edge of the handle 54, and the other end of the crank 53 is hinged to the lower end of the locking rod 52; when the handle 54 rotates, the locking rod 52 is driven to slide back and forth up and down through the crank 53; When the handle 54 is rotated downward to a horizontal state, the lower end of the locking rod 52 is pressed against the upper side of the base 1, thereby locking the position of the support slider 13; when the handle 54 is rotated upward to a vertical state, the locking rod 52 slides upward, and there is a gap between the lower end of the locking rod 52 and the upper side of the base 1, so that the support slider 13 can be slidably adjusted.

[0034] Reference Figure 6 A mounting plate 16 is fixed on the upper side of the support slider 13, wherein an upper contact switch 17 located above the extension rod 14 is fixed on the mounting plate 16; a mounting frame 18 is fixed on the side of the support slider 13 away from the locking member 5 by screws, and a lower contact switch 19 located below the extension rod 14 is fixed on the mounting frame 18; When the extension rod 14 rotates upward to the extreme position, it can trigger the upper contact switch 17, and when it rotates downward to the extreme position, it can trigger the lower contact switch 19, thereby monitoring and limiting the rotation angle of the extension rod 14, the insulating rod 41 and the detection contact piece 42, thereby improving the safety performance of the detection equipment when in use.

[0035] Reference Figure 6The power part 44 is a power cylinder 441, wherein the lower end of the power cylinder 441 is hinged to the lower part of the mounting frame 18, and the upper end of the power cylinder 441 is hinged to the outer peripheral surface of the extension rod 14; when the power cylinder 441 operates and retracts, it drives the extension rod 14 and the detection contact piece 42 to rotate back and forth.

[0036] The implementation principle of the embodiment of this application is: First, the position and height of the base plate 2 are precisely adjusted by adjusting the assembly 3 to ensure that the detection contact 42 is aligned with the designated detection point of the pole-mounted circuit breaker. Then, the position of the support slider 13 is locked to ensure the stability of the detection process. Next, the power cylinder 441 is started to drive the insulating rod 41 and the detection contact 42 to rotate back and forth to the input or output end of the pole-mounted circuit breaker for voltage resistance testing. At the same time, the upper and lower contact switches 19 monitor and limit the rotation angles of the extension rod 14, the insulating rod 41, and the detection contact 42 to ensure the safety of the detection process. The device can be used in combination of two to comprehensively test the voltage resistance performance of the pole-mounted circuit breaker.

[0037] Example 2: Reference Figure 7 、 Figure 8 and Figure 9 The embodiment of the present application differs from the embodiment 1 in that a protective assembly 6 is provided above the base 1, and the protective assembly 6 includes a plurality of first support rods 61, second support rods 62 and a protective curtain 63. The number of the first support rods 61 and the second support rods 62 is the same as that of the insulating rods 41, that is, three groups. A support cross plate 211 is fixedly provided on the side of the support frame 21 near the extension rod 14. The two ends of the first support rod 61 are respectively hinged to the end of the second support rod 62 and the upper side of the support cross plate 211. The three first support rods 61 are arranged side by side, and the other ends of the second support rods 62 are hinged to the outer circumference of the insulating rod 41. The hinge point between the first support rod 61 and the second support rod 62 protrudes upward. A plurality of hooks 631 are fixedly provided on opposite side edges of the protective curtain 63, and a snap ring 611 for the hooks 631 to engage is fixedly provided on the first support rod 61 and the second support rod 62. In this way, the opposite side surfaces of the protective curtain 63 are detachably connected to the mutually adjacent side surfaces of the adjacent first support rod 61 and the adjacent second support rod 62, thereby protecting the upper parts of the adjacent first support rod 61 and the second support rod 62 and reducing the possibility of dust falling on the extension rod 14.

[0038] Reference Figure 8 and Figure 10An arc-shaped rod 612 is fixed to the upper edge of the end of the first support rod 61 near the second support rod 62, and both ends of the arc-shaped rod 612 are bent upward; a fixing member 7 is provided above the arc-shaped rod 612, wherein the fixing member 7 includes a locking plate 71 and a butterfly bolt 72, one end of the locking plate 71 is hinged to one end of the arc-shaped rod 612, and the other end of the locking plate 71 is detachably connected to the other end of the arc-shaped rod 612 through the butterfly bolt 72; When the extension rod 14 and the detection contact piece 42 rotate up and down, the combined structure of the arc rod 612 and the locking plate 71 can limit the cable 43 connected to the detection contact piece 42. At this time, the arc rod 612 moves up or down synchronously to keep the cable 43 taut, reducing the possibility of interlacing or entanglement between the three cables 43.

[0039] The working principle of the embodiment of this application: The first support rod 61, the second support rod 62 and the protective curtain 63 in the protective assembly 6 can be used to build a protective barrier above the extension rod 14 to prevent dust and other impurities from interfering with the detection; during the rotation of the detection contact 42, the combined structure of the arc rod 612 and the locking plate 71 effectively limits the cable 43, keeps it in a tensioned state, and avoids the cable 43 from being intertwined or entangled.

[0040] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A withstand voltage detection device for a pole-mounted circuit breaker, comprising a base (1), a base plate (2) located above the base plate (1), an adjustment assembly (3) for driving the base plate (2) to adjust horizontally and vertically, a plurality of insulating rods (41) and a detection contact piece (42) fixed to one end of the insulating rod (41) are hingedly connected to the base plate (2), a cable (43) with one end connected to the detection contact piece (42) is provided above the base plate (1), and a power piece (44) for driving the insulating rod (41) to rotate back and forth is provided on the side of the base plate (2); It is characterized by: A support frame (21) is fixedly provided above the substrate (2), an insulating column (22) is fixedly provided on the upper side of the support frame (21), a connecting plate (23) is fixedly provided on the upper end of the insulating column (22), and a cable (43) connected to the detection contact piece (42) is wound and fixed on the connecting plate (23); a support slider (13) is slidably provided on the upper side of the substrate (2), an extension rod (14) is hinged on the support slider (13), the end of the insulating rod (41) away from the detection contact piece (42) is coaxially fixedly connected with the end of the extension rod (14) away from the support slider (13), a positioning block (15) is fixedly provided on the support slider (13), and a locking member (5) for sliding and locking the support slider (13) is provided on the positioning block (15).

2. The withstand voltage detection device for a pole mounted circuit breaker according to claim 1, characterized in that: The adjustment assembly (3) comprises an adjustment plate (31), a first adjustment bolt (32) and a second adjustment bolt (33); the adjustment plate (31) is slidably arranged on the upper side of the base (1); a plurality of guide rods (311) are fixedly arranged on the adjustment plate (31); and a guide through hole for the guide rods (311) to pass through is opened on the base plate (2); A second adjustment block (312) is fixedly provided on the adjustment plate (31), a first adjustment block (11) located on one side of the second adjustment block (312) is fixedly provided on the base (1), the first adjustment bolt (32) is used to adjust the distance between the first adjustment block (11) and the second adjustment block (312), and the second adjustment bolt (33) is used to tighten the connection between the guide rod (311) and the base plate (2).

3. The withstand voltage detection device for a pole mounted circuit breaker according to claim 1, characterized in that: The locking member (5) comprises a receiving frame (51), a locking rod (52), a crank (53) and a handle (54); the receiving frame (51) is fixed on a vertical side surface of the positioning block (15) away from the supporting slider (13); and a receiving through hole (511) is provided on the receiving frame (51) for the locking rod (52) to pass through in a vertical direction; One end of the handle (54) is rotatably connected to the receiving frame (51), one end of the crank (53) is hinged to the outer edge of the handle (54), and the other end of the crank (53) is hinged to the lower end of the locking rod (52); when the handle (54) rotates, the crank (53) drives the locking rod (52) to slide back and forth up and down, and the lower end of the locking rod (52) can be tightly pressed against the upper side of the base (1).

4. The withstand voltage detection device for a pole mounted circuit breaker according to claim 1, characterized in that: A mounting plate (16) is fixedly provided on the upper side surface of the supporting slider (13), and an upper contact switch (17) located above the extension rod (14) is fixedly provided on the mounting plate (16); A mounting frame (18) is fixedly provided on the side of the support slider (13) away from the locking member (5); a lower contact switch (19) is fixedly provided on the mounting frame (18) and is located below the extension rod (14); the extension rod (14) can trigger the upper contact switch (17) when it rotates upward, and can trigger the lower contact switch (19) when it rotates downward.

5. The withstand voltage detection device for a pole mounted circuit breaker according to claim 4, characterized in that: The power member (44) is a power cylinder (441), the lower end of the power cylinder (441) is hinged to the lower part of the installation frame (18), and the upper end of the power cylinder (441) is hinged to the outer peripheral surface of the extension rod (14).

6. The withstand voltage detection device for a pole mounted circuit breaker according to claim 1, characterized in that: A protective assembly (6) is provided above the base (1), the protective assembly (6) comprising a plurality of first support rods (61), second support rods (62) and protective curtains (63), the number of the first support rods (61) and the second support rods (62) being the same as the number of the insulating rods (41), and a supporting horizontal plate (211) being fixedly provided on the side of the support frame (21) close to the extension rod (14); The two ends of the first support rod (61) are hinged to the end of the second support rod (62) and the upper side surface of the supporting horizontal plate (211), respectively, and the other end of the second support rod (62) is hinged to the outer peripheral surface of the insulating rod (41); the hinge point of the first support rod (61) and the second support rod (62) protrudes upward, and the two opposite side surfaces of the protective curtain (63) are detachably connected to the side surfaces of the adjacent first support rod (61) and the adjacent second support rod (62) that are close to each other.

7. The withstand voltage detection device for a pole mounted circuit breaker according to claim 6, characterized in that: A plurality of hooks (631) are fixedly provided on the opposite edges of the protective curtain (63), and a snap ring (611) for the hooks (631) to be snapped in is fixedly provided on the first support rod (61) and the second support rod (62).

8. The withstand voltage testing device for a pole mounted circuit breaker according to claim 6, characterized in that: An arc-shaped rod (612) is fixedly provided on the upper edge of the end of the first support rod (61) close to the second support rod (62), with both ends of the arc-shaped rod (612) bent upwards. The arc-shaped rod (612) can limit the cable (43) connected to the detection contact piece (42).

9. The withstand voltage testing device for a pole mounted circuit breaker according to claim 8, characterized in that: A locking plate (71) and a butterfly bolt (72) are provided above the arc-shaped rod (612); one end of the locking plate (71) is hinged to one end of the arc-shaped rod (612); and the other end of the locking plate (71) is detachably connected to the other end of the arc-shaped rod (612) via the butterfly bolt (72).

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