CN113075504A

CN113075504A - Alternating current-direct current withstand voltage partial discharge test device

Info

Publication number: CN113075504A
Application number: CN202110294215.9A
Authority: CN
Inventors: 胡文裕
Original assignee: Jiangsu Hengrun Electric Power Design Institute Co ltd
Current assignee: Jiangsu Hengrun Electric Power Design Institute Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-07-06

Abstract

The invention belongs to the field of voltage withstand tests, in particular to an alternating current-direct current voltage withstand partial discharge test device, which aims at solving the problems that the existing test device is lack of protection for workers during use, the workers can not effectively exit a dangerous range during use, and often can not be conveniently transferred, and the use is inconvenient, and the invention provides a scheme that the device comprises a test device body, the bottom of the test device body is fixedly connected with a movable base, the bottom of the movable base is fixedly connected with two U-shaped plates, axles are rotatably arranged on the two U-shaped plates, and wheels are fixedly connected with two ends of the two axles, when the device is used, the device can protect the workers through an annular protection plate, and simultaneously, the workers can effectively exit the dangerous range during use, and can be conveniently transferred, and the axles and the wheels can be locked after being transferred to a designated place, further improving the stability of the product.

Description

Alternating current-direct current withstand voltage partial discharge test device

Technical Field

The invention relates to the technical field of withstand voltage tests, in particular to an alternating current/direct current withstand voltage partial discharge test device.

Background

The withstand voltage test equipment is an important test equipment in the operation and maintenance process of power equipment, and is widely applied to the insulation strength tests of various high-voltage electrical equipment, electrical elements, insulating materials and the like, such as: the local electric field intensity in the insulation is too high; the metal part is provided with a sharp corner; impurities are mixed in the insulation or the electrical connection between metal grounding parts and between electric conductors in the product with defects is poor, so that the defects are eliminated, and the insulation is prevented from being damaged by local discharge;

but general test device lacks the protection to the staff when using, can not effectually make the staff withdraw from dangerous scope when using, and often can not be convenient shift, uses comparatively inconveniently.

Disclosure of Invention

The invention aims to solve the defects that a test device in the prior art lacks protection on workers during use, cannot effectively enable the workers to quit a dangerous range during use, often cannot be conveniently transferred, and is inconvenient to use, and provides an alternating current/direct current voltage-withstanding partial discharge test device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a withstand voltage partial discharge test device of alternating current-direct current, including the test device body, the bottom fixedly connected with of test device body removes the base, remove two U-shaped boards of bottom fixedly connected with of base, all rotate on two U-shaped boards and install the axletree, the equal fixedly connected with wheel in both ends of two axletrees, be provided with stop gear on the removal base, stop gear cooperatees with two axletrees, the top of test device body is provided with two circuit clamps, the motor chamber has been seted up in the test device body, motor intracavity fixed mounting has positive reverse motor, the top of test device body is provided with protection machanism, the outside of test device body is provided with median mechanism, positive reverse motor cooperatees with protection machanis.

Preferably, stop gear includes pneumatic cylinder, hydraulic telescoping rod, mount, two arc latch pieces, two connecting rods and two antiskid ribbed tile, has seted up the installation cavity in the removal base, and pneumatic cylinder fixed mounting is in the installation cavity, and hydraulic telescoping rod welds with the output shaft of pneumatic cylinder mutually, and hydraulic telescoping rod's bottom extends to the below of removing the base and with mount fixed connection, two arc latch pieces and two connecting rods all with the bottom fixed connection of mounting bracket, the bottom of two connecting rods respectively with two antiskid ribbed tile fixed connection.

Preferably, the outer sides of the two axles are fixedly sleeved with limit gears, and the two limit gears are respectively matched with the two arc-shaped clamping tooth sheets.

Preferably, the protection machanism includes the annular guard plate, two racks, first rotary rod, gear and worm wheel, the annular groove of accomodating has been seted up at the top of testing device body, annular guard plate slidable mounting is in the annular inslot of accomodating, all set up flutedly on the both sides inner wall of annular guard plate, two racks fixed mounting is respectively in two recesses, first rotatory hole has been seted up on the testing device body, first rotary rod rotates to be installed in first rotatory downthehole, the both ends of first rotary rod respectively with two gear fixed connection, two gears mesh with two racks respectively, the transmission chamber has been seted up on the testing device body, the transmission chamber is put through with first rotatory hole, the outside of first rotary rod is located to the fixed cover of worm wheel, and the worm wheel is located the transmission intracavity.

Preferably, the isolation belt mechanism comprises four rectangular rods, four arc-shaped plates, two isolation belts and a control switch, the four rectangular sliding grooves are symmetrically formed in the outer side of the testing device body, the four rectangular rods are slidably mounted in the four rectangular sliding grooves respectively, one ends of the four rectangular rods are fixedly connected with the four arc-shaped plates respectively, the two isolation belts are fixedly sleeved on the outer sides of the four arc-shaped plates, one arc-shaped plate in the four arc-shaped plates is fixedly connected with the control switch, and the control switch is matched with the forward and reverse rotating motor.

Preferably, one side, close to each other, of the motor cavity and the transmission cavity is provided with a second rotating hole, a second rotating rod is rotatably mounted in the second rotating hole, the top end of the second rotating rod extends into the transmission cavity and is fixedly connected with a worm, and the worm is meshed with the worm wheel.

Preferably, the gear chamber has been seted up in the testing device body, the gear chamber is put through with the second rotating hole, the fixed cover in the outside of second rotating rod is equipped with big bevel gear, big bevel gear is located the gear intracavity, the third rotating hole has all been seted up to one side that gear chamber and four rectangle spouts are close to each other, the threaded rod is installed all to rotating in four third rotating holes, the thread groove has all been seted up to the other end of four rectangle poles, the one end difference threaded mounting of four threaded rods is in four thread grooves, the equal fixedly connected with bevel pinion of the other end of four threaded rods, four bevel pinion all mesh with big bevel gear mutually.

Preferably, a rotating shaft is welded on an output shaft of the forward and reverse rotating motor, a pinion is fixedly connected to one end of the rotating shaft, a first bevel gear is fixedly sleeved on the outer side of the rotating shaft, a second bevel gear is fixedly connected to the bottom end of the second rotating rod, and the second bevel gear is meshed with the first bevel gear.

Preferably, a third rotating rod is installed in the motor cavity in a rotating mode, a large gear is fixedly sleeved on the outer side of the third rotating rod, and the large gear is meshed with the small gear.

Preferably, a button is arranged on the inner wall of one side of the motor cavity and matched with the two circuit clamps, a trigger rod is fixedly mounted on the outer side of the third rotating rod and matched with the button.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the scheme, the worm is matched with the worm wheel, and the gear is matched with the rack, so that the annular protection plate can be lifted to a certain height in advance before the button is contacted by the trigger rod, the periphery of a test target is effectively blocked, and other accidental conditions caused by the fact that the test target cannot bear voltage in the test process are avoided;

2. according to the scheme, the large bevel gear is matched with the small bevel gear, the threaded rod is matched with the rectangular rod through the threaded groove, and the arc-shaped plate is matched with the isolation belt, so that the rectangular rod can be displaced to a certain length before the button is contacted by the trigger rod, a certain isolation space is generated around the testing device body by matching the arc-shaped plate with the isolation belt, and the danger range of a pressure test is effectively avoided for workers;

3. according to the scheme, the arc-shaped clamping tooth piece is matched with the limiting gear, the connecting rod is matched with the antiskid plate, so that the test device is convenient to transfer through the wheel, the axle and the wheel are locked by embedding the limiting gear with the arc-shaped clamping tooth piece after the test device is transferred to a specified place, meanwhile, the antiskid plate is abutted against the ground, the friction coefficient of the antiskid plate is improved, and the stability of the antiskid plate is further improved;

when the safety protection device is used, workers can be protected through the annular protection plate, meanwhile, the workers can effectively quit the dangerous range when in use, the safety protection device can be conveniently transferred, the axle and the wheels can be locked after the safety protection device is transferred to a specified place, and the stability of the safety protection device is further improved.

Drawings

Fig. 1 is a schematic structural diagram of an ac/dc withstand voltage partial discharge test apparatus according to the present invention;

fig. 2 is a schematic cross-sectional structure diagram of an ac/dc withstand voltage partial discharge test apparatus according to the present invention;

fig. 3 is an enlarged schematic structural diagram of a part a in fig. 2 of an ac/dc withstand voltage partial discharge test apparatus according to the present invention;

fig. 4 is an enlarged schematic structural diagram of a part B in fig. 2 of the ac/dc withstand voltage partial discharge test apparatus according to the present invention;

fig. 5 is an enlarged schematic structural diagram of a part C in fig. 2 of an ac/dc withstand voltage partial discharge test apparatus according to the present invention.

In the figure: the device comprises a test device body 1, a movable base 2, a U-shaped plate 3, an axle 4, wheels 5, a circuit clamp 6, a motor cavity 7, a forward and reverse rotating motor 8, a hydraulic cylinder 9, a hydraulic telescopic rod 10, a fixed frame 11, an arc-shaped tooth clamping sheet 12, a connecting rod 13, a antiskid plate 14, a limit gear 15, an annular protection plate 16, a rack 17, a first rotating rod 18, a gear 19, a worm gear 20, an annular accommodating groove 21, a rectangular rod 22, an arc-shaped plate 23, an isolation belt 24, a control switch 25, a second rotating rod 26, a worm 27, a large bevel gear 28, a threaded rod 29, a small bevel gear 30, a rotating shaft 31, a small gear 32, a first bevel gear 33, a second bevel gear 34, a third rotating rod 35, a large gear 36, a button 37, a trigger lever 38, a transmission.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-5, an alternating current-direct current withstand voltage partial discharge test device comprises a test device body 1, a bottom fixedly connected with movable base 2 of the test device body 1, two U-shaped plates 3 fixedly connected with the bottom of the movable base 2, axles 4 are installed on the two U-shaped plates 3 in a rotating mode, wheels 5 are fixedly connected with the two ends of the two axles 4, a limiting mechanism is arranged on the movable base 2 and matched with the two axles 4, two circuit clamps 6 are arranged at the top of the test device body 1, a motor cavity 7 is formed in the test device body 1, a forward and reverse motor 8 is fixedly installed in the motor cavity 7, a protection mechanism is arranged at the top of the test device body 1, an isolation belt mechanism is arranged on the outer side of the test device body 1, and the forward and reverse motor 8 is matched with the protection mechanism and the.

In this embodiment, stop gear includes pneumatic cylinder 9, hydraulic telescoping rod 10, mount 11, two arc latch pieces 12, two connecting rods 13 and two antiskid ribbed tile 14, the installation cavity has been seted up in the

removal base

2, 9 fixed mounting of pneumatic cylinder in the installation cavity, hydraulic telescoping rod 10 welds with the output shaft of pneumatic cylinder 9 mutually, hydraulic telescoping rod 10's bottom extend to the below of removing base 2 and with mount 11 fixed connection, two arc latch pieces 12 and two connecting rods 13 all with the bottom fixed connection of mounting bracket 11, the bottom of two connecting rods 13 respectively with two antiskid ribbed tile 14 fixed connection, antiskid ribbed tile 14 can offset and promote frictional force with ground.

In this embodiment, the outside of two axletrees 4 is all fixed the cover and is equipped with limit gear 15, and two limit gear 15 cooperate with two arc-shaped latch pieces 12 respectively, and arc-shaped latch piece 12 can be with limit gear 15 locking.

In this embodiment, the protection mechanism includes an annular protection plate 16, two racks 17, a first rotating rod 18, a gear 19 and a worm wheel 20, an annular accommodating groove 21 is formed at the top of the testing device body 1, the annular protection plate 16 is slidably mounted in the annular accommodating groove 21, grooves are formed on inner walls of two sides of the annular protection plate 16, the two racks 17 are respectively and fixedly mounted in the two grooves, a first rotating hole is formed on the testing device body 1, the first rotating rod 18 is rotatably mounted in the first rotating hole, two ends of the first rotating rod 18 are respectively and fixedly connected with the two gears 19, the two gears 19 are respectively engaged with the two racks 17, a transmission cavity 39 is formed on the testing device body 1, the transmission cavity 39 is communicated with the first rotating hole, and the worm wheel 20 is fixedly sleeved outside the first rotating rod 18, and the worm wheel 20 is positioned in the transmission cavity 39, and the gear 19 can drive the annular protection plate 16 to slide and displace through the rack 17.

In this embodiment, median mechanism includes four rectangular rods 22, four arcs 23, two median 24 and control switch 25, four rectangle spouts have been seted up to test device body 1's outside symmetry, four rectangular rods 22 are sliding mounting respectively in four rectangle spouts, four rectangular rods 22's one end respectively with four arcs 23 fixed connection, four arcs 23's the outside is located to two median 24 fixed covers, 23 and the control switch 25 fixed connection of an arc in four arcs 23, control switch 25 cooperatees with positive reverse motor 8, rectangular rods 22 can be along rectangle spout sliding displacement.

In this embodiment, one side of the motor cavity 7 close to the transmission cavity 39 is provided with a second rotating hole, a second rotating rod 26 is rotatably installed in the second rotating hole, the top end of the second rotating rod 26 extends into the transmission cavity 39 and is fixedly connected with a worm 27, the worm 27 is meshed with the worm wheel 20, and the worm 27 can drive the worm wheel 20 to rotate.

In this embodiment, gear chamber 40 has been seted up in test device body 1, gear chamber 40 communicates with the second rotating hole, the fixed cover in outside of second rotating rod 26 is equipped with big bevel gear 28, big bevel gear 28 is located gear chamber 40, third rotating hole has all been seted up to one side that gear chamber 40 and four rectangle spouts are close to each other, threaded rod 29 is installed all to rotating in four third rotating holes, the thread groove has all been seted up to four rectangle poles 22's the other end, threaded mounting is in four thread grooves respectively to four threaded rod 29's one end, the equal fixedly connected with bevel pinion 30 of the other end of four threaded rod 29, four bevel pinion 30 all mesh with big bevel gear 28 mutually, big bevel gear 28 can drive four bevel pinion 30 rotations simultaneously.

In this embodiment, a rotating shaft 31 is welded on an output shaft of the forward and reverse rotation motor 8, a pinion 32 is fixedly connected to one end of the rotating shaft 31, a first bevel gear 33 is fixedly sleeved on an outer side of the rotating shaft 31, a second bevel gear 34 is fixedly connected to a bottom end of the second rotating rod 26, the second bevel gear 34 is engaged with the first bevel gear 33, and the first bevel gear 33 can drive the second bevel gear 34 to rotate.

In this embodiment, a third rotating rod 35 is rotatably mounted in the motor cavity 7, a large gear 36 is fixedly sleeved on the outer side of the third rotating rod 35, the large gear 36 is engaged with the small gear 32, and the small gear 32 can drive the large gear 36 to rotate and reduce the speed.

In this embodiment, a button 37 is arranged on an inner wall of one side of the motor cavity 7, the button 37 is matched with the two circuit clamps 6, a trigger rod 38 is fixedly installed on an outer side of the third rotating rod 35, the trigger rod 38 is matched with the button 37, and the third rotating rod 35 can drive the trigger rod 38 to make an annular motion until the annular motion is abutted against the button 37.

Example two

Referring to fig. 1-5, an alternating current-direct current withstand voltage partial discharge test device comprises a test device body 1, the bottom of the test device body 1 is fixedly connected with a movable base 2 through welding, the bottom of the movable base 2 is fixedly connected with two U-shaped plates 3 through welding, axles 4 are rotatably mounted on the two U-shaped plates 3, wheels 5 are fixedly connected at two ends of the two axles 4 through welding, a limiting mechanism is arranged on the movable base 2 and matched with the two axles 4, two circuit clamps 6 are arranged at the top of the test device body 1, a motor cavity 7 is formed in the test device body 1, a forward and reverse motor 8 is fixedly mounted in the motor cavity 7 through bolts, a protection mechanism is arranged at the top of the test device body 1, an isolation belt mechanism is arranged on the outer side of the test device body 1, and the forward and reverse motor 8 is matched with the protection mechanism and the isolation belt.

In this embodiment, stop gear includes pneumatic cylinder 9, hydraulic telescoping rod 10, mount 11, two arc-shaped latch pieces 12, two connecting rods 13 and two antiskid ribbed tile 14, the installation cavity has been seted up in the removal base 2, pneumatic cylinder 9 passes through bolt fixed mounting in the installation cavity, hydraulic telescoping rod 10 welds with the output shaft of pneumatic cylinder 9 mutually, hydraulic telescoping rod 10's bottom extends to the below of removing base 2 and passes through welded fastening with mount 11 and be connected, welded fastening is passed through with the bottom of mounting bracket 11 to two arc-shaped latch pieces 12 and two connecting rods 13 all, two connecting rods 13's bottom passes through welded fastening with two antiskid ribbed tile 14 respectively and is connected, antiskid ribbed tile 14 can offset and promote frictional force with ground.

In this embodiment, the outside of two axletrees 4 all is equipped with limit gear 15 through the fixed cover of welding, and two limit gear 15 cooperate with two arc latch pieces 12 respectively, and arc latch piece 12 can be with limit gear 15 locking.

In this embodiment, the protection mechanism includes an annular protection plate 16, two racks 17, a first rotating rod 18, a gear 19 and a worm wheel 20, an annular accommodating groove 21 is formed at the top of the testing device body 1, the annular protection plate 16 is slidably mounted in the annular accommodating groove 21, grooves are formed on inner walls of two sides of the annular protection plate 16, the two racks 17 are respectively fixedly mounted in the two grooves by welding, a first rotating hole is formed on the testing device body 1, the first rotating rod 18 is rotatably mounted in the first rotating hole, two ends of the first rotating rod 18 are respectively fixedly connected with the two gears 19 by welding, the two gears 19 are respectively engaged with the two racks 17, a transmission cavity 39 is formed on the testing device body 1, the transmission cavity 39 is communicated with the first rotating hole, the worm wheel 20 is arranged at the outer side of the first rotating rod 18 by welding, and the worm wheel 20 is located in the transmission cavity 39, the gear 19 can drive the annular protection plate 16 to slide and displace through the rack 17.

In this embodiment, median mechanism includes four rectangular rods 22, four arcs 23, two median 24 and control switch 25, four rectangle spouts have been seted up to test device body 1's outside symmetry, four rectangular rods 22 are sliding mounting respectively in four rectangle spouts, four rectangular rods 22's one end passes through welded fastening with four arcs 23 respectively and is connected, two median 24 locate four arcs 23's the outside through the fixed cover of bonding, an arc 23 in four arcs 23 passes through bolt fixed connection with control switch 25, control switch 25 cooperatees with positive reverse motor 8, rectangular rods 22 can be along rectangle spout sliding displacement.

In this embodiment, one side of the motor cavity 7 close to the transmission cavity 39 is provided with a second rotating hole, a second rotating rod 26 is rotatably mounted in the second rotating hole, the top end of the second rotating rod 26 extends into the transmission cavity 39 and is fixedly connected with a worm 27 through welding, the worm 27 is meshed with the worm wheel 20, and the worm 27 can drive the worm wheel 20 to rotate.

In this embodiment, a gear cavity 40 has been seted up in the test device body 1, gear cavity 40 communicates with the second rotating hole, the outside of second rotary rod 26 is equipped with big bevel gear 28 through the fixed cover of welding, big bevel gear 28 is located gear cavity 40, third rotating hole has all been seted up to one side that gear cavity 40 and four rectangle spouts are close to each other, threaded rod 29 is installed all to all rotating in four third rotating holes, the thread groove has all been seted up to four rectangle poles 22's the other end, threaded installation is in four thread grooves respectively to four threaded rod 29's one end, the other end of four threaded rod 29 all is connected with bevel pinion 30 through welded fastening, four bevel pinion 30 all mesh with big bevel gear 28 mutually, big bevel gear 28 can drive four bevel pinion 30 rotations simultaneously.

In this embodiment, the rotating shaft 31 is welded on the output shaft of the forward and reverse rotating motor 8, one end of the rotating shaft 31 is fixedly connected with the pinion 32 by welding, the outer side of the rotating shaft 31 is fixedly sleeved with the first bevel gear 33 by welding, the bottom end of the second rotating rod 26 is fixedly connected with the second bevel gear 34 by welding, the second bevel gear 34 is meshed with the first bevel gear 33, and the first bevel gear 33 can drive the second bevel gear 34 to rotate.

In this embodiment, a third rotating rod 35 is rotatably mounted in the motor cavity 7, a large gear 36 is fixedly sleeved on the outer side of the third rotating rod 35 through welding, the large gear 36 is engaged with the small gear 32, and the small gear 32 can drive the large gear 36 to rotate and reduce the speed.

In this embodiment, a button 37 is arranged on an inner wall of one side of the motor cavity 7, the button 37 is matched with the two circuit clamps 6, a trigger rod 38 is fixedly installed on the outer side of the third rotating rod 35 through welding, the trigger rod 38 is matched with the button 37, and the third rotating rod 35 can drive the trigger rod 38 to make annular motion until the annular motion is abutted against the button 37.

In the invention, when the device is used, firstly, the testing device body 1 is required to be transferred to a designated place, then the hydraulic cylinder 9 is started, the output shaft of the hydraulic cylinder 9 drives the hydraulic telescopic rod 10 to extend, the hydraulic telescopic rod 10 drives the fixing frame 11 to displace, the fixing frame 11 drives the arc-shaped latch piece 12 to be embedded with the limiting gear 15, so that the axle 4 and the wheels 5 are locked, meanwhile, the fixing frame 11 enables the anti-skid plate 14 to be abutted against the ground through the connecting rod 13, so that the friction coefficient is effectively increased, the stability of the testing device body 1 in use is further improved, then, a target of a pressure test is placed on the top of the testing device body 1, the circuit clamp 6 is connected with the testing device body, then the forward and reverse rotating motor 8 is enabled to rotate forward through the control switch 25, the output shaft of the forward and reverse rotating motor 8 drives the, the first bevel gear 33 drives the second bevel gear 34 to rotate, the pinion 32 drives the big gear 36 to rotate and reduce the speed, the big gear 36 drives the trigger rod 38 to rotate through the third rotating rod 35, meanwhile, the second bevel gear 34 drives the second rotating rod 26 to rotate, the second rotating rod 26 drives the worm 27 to rotate, the worm 27 drives the worm wheel 20 to rotate, the worm wheel 20 drives the first rotating rod 18 to rotate, the first rotating rod 18 drives the gear 19 to rotate, the gear 19 drives the annular protection plate 16 to move upwards through the rack 17, so that the annular protection plate 16 gradually protects the periphery of the pressure test target, meanwhile, the second rotating rod 26 drives the big bevel gear 28 to rotate, the big bevel gear 28 drives the small bevel gear 30 to rotate, the small bevel gear 30 drives the threaded rod 29 to rotate, the threaded rod 29 drives the rectangular rod 22 to move through the threaded groove, the rectangular rod 22 drives the arc-shaped plate 23 to move, so that the arc-shaped plate 23 cooperates with, therefore, the working personnel can avoid dangerous areas in time until the trigger rod 38 abuts against the button 37 finally, the circuit clamp 6 is electrified, and the withstand voltage partial discharge test is carried out.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An alternating current-direct current withstand voltage partial discharge test device comprises a test device body (1) and is characterized in that the bottom of the test device body (1) is fixedly connected with a movable base (2), the bottom of the movable base (2) is fixedly connected with two U-shaped plates (3), the two U-shaped plates (3) are respectively and rotatably provided with an axle (4), two ends of each axle (4) are respectively and fixedly connected with a wheel (5), the movable base (2) is provided with a limiting mechanism, the limiting mechanisms are matched with the two axles (4), the top of the test device body (1) is provided with two circuit clamps (6), a motor cavity (7) is formed in the test device body (1), a forward and reverse motor (8) is fixedly arranged in the motor cavity (7), the top of the test device body (1) is provided with a protection mechanism, and the outer side of the test device body (1) is provided with an isolation, the positive and negative rotation motor (8) is matched with the protection mechanism and the isolation belt mechanism.

2. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein the limiting mechanism comprises a hydraulic cylinder (9), a hydraulic telescopic rod (10), a fixed frame (11), two arc-shaped snap tooth sheets (12), two connecting rods (13) and two anti-slip plates (14), a mounting cavity is formed in the movable base (2), the hydraulic cylinder (9) is fixedly mounted in the mounting cavity, the hydraulic telescopic rod (10) is welded with an output shaft of the hydraulic cylinder (9), the bottom end of the hydraulic telescopic rod (10) extends to the lower portion of the movable base (2) and is fixedly connected with the fixed frame (11), the two arc-shaped snap tooth sheets (12) and the two connecting rods (13) are fixedly connected with the bottom of the mounting frame (11), and the bottom ends of the two connecting rods (13) are respectively fixedly connected with the two anti-slip plates (14).

3. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein limiting gears (15) are fixedly sleeved on the outer sides of the two axles (4), and the two limiting gears (15) are respectively matched with the two arc-shaped clamping tooth sheets (12).

4. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein the protection mechanism comprises an annular protection plate (16), two racks (17), a first rotating rod (18), a gear (19) and a worm gear (20), an annular accommodating groove (21) is formed in the top of the test device body (1), the annular protection plate (16) is slidably mounted in the annular accommodating groove (21), grooves are formed in inner walls of two sides of the annular protection plate (16), the two racks (17) are respectively and fixedly mounted in the two grooves, a first rotating hole is formed in the test device body (1), the first rotating rod (18) is rotatably mounted in the first rotating hole, two ends of the first rotating rod (18) are respectively and fixedly connected with the two gears (19), the two gears (19) are respectively engaged with the two racks (17), a transmission cavity (39) is formed in the test device body (1), the transmission cavity (39) is communicated with the first rotating hole, the worm wheel (20) is fixedly sleeved on the outer side of the first rotating rod (18), and the worm wheel (20) is positioned in the transmission cavity (39).

5. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein the isolation belt mechanism comprises four rectangular rods (22), four arc-shaped plates (23), two isolation belts (24) and a control switch (25), four rectangular sliding grooves are symmetrically formed in the outer side of the test device body (1), the four rectangular rods (22) are respectively and slidably mounted in the four rectangular sliding grooves, one ends of the four rectangular rods (22) are respectively and fixedly connected with the four arc-shaped plates (23), the two isolation belts (24) are fixedly sleeved on the outer sides of the four arc-shaped plates (23), one arc-shaped plate (23) of the four arc-shaped plates (23) is fixedly connected with the control switch (25), and the control switch (25) is matched with the forward and reverse rotating motor (8).

6. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein one side of the motor cavity (7) close to the transmission cavity (39) is provided with a second rotating hole, a second rotating rod (26) is rotatably mounted in the second rotating hole, the top end of the second rotating rod (26) extends into the transmission cavity (39) and is fixedly connected with a worm (27), and the worm (27) is meshed with the worm wheel (20).

7. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein a gear cavity (40) is formed in the test device body (1), the gear cavity (40) is communicated with the second rotating hole, a large bevel gear (28) is fixedly sleeved on the outer side of the second rotating rod (26), the large bevel gear (28) is located in the gear cavity (40), third rotating holes are formed in the sides, close to each other, of the gear cavity (40) and the four rectangular sliding grooves, a threaded rod (29) is rotatably mounted in each of the four third rotating holes, threaded grooves are formed in the other ends of the four rectangular rods (22), one ends of the four threaded rods (29) are respectively and threadedly mounted in the four threaded grooves, small bevel gears (30) are fixedly connected to the other ends of the four threaded rods (29), and the four small bevel gears (30) are respectively meshed with the large bevel gear (28).

8. The alternating current/direct current withstand voltage partial discharge test device according to claim 1, wherein a rotating shaft (31) is welded on an output shaft of the forward/reverse rotating motor (8), a pinion (32) is fixedly connected to one end of the rotating shaft (31), a first bevel gear (33) is fixedly sleeved on the outer side of the rotating shaft (31), a second bevel gear (34) is fixedly connected to the bottom end of the second rotating rod (26), and the second bevel gear (34) is meshed with the first bevel gear (33).

9. The alternating current/direct current withstand voltage partial discharge test device according to claim 1, wherein a third rotating rod (35) is rotatably mounted in the motor cavity (7), a large gear (36) is fixedly sleeved on the outer side of the third rotating rod (35), and the large gear (36) is meshed with the small gear (32).

10. The alternating current-direct current withstand voltage partial discharge test device according to claim 1, wherein a button (37) is arranged on an inner wall of one side of the motor cavity (7), the button (37) is matched with the two circuit clamps (6), a trigger rod (38) is fixedly installed on the outer side of the third rotating rod (35), and the trigger rod (38) is matched with the button (37).