CN107831424B - Be used for GIS interval withstand voltage test testing arrangement - Google Patents

Abstract

The invention discloses a testing device for a GIS interval withstand voltage test, which comprises a closed shell, an outlet sleeve, a first conducting rod, a moving end rotating device, a moving end supporting device and a basin-type insulator, wherein the closed shell is arranged on the first conducting rod; the movable end supporting device is arranged at the right end of the closed shell, and the basin-type insulator is arranged at the left end of the closed shell; the wire outlet sleeve is arranged at the outer side of the upper end of the closed shell, the first conductive rod is arranged in the wire outlet sleeve, and the first conductive rod extends into the closed shell and is electrically connected with the movable end supporting device; the movable end rotating device comprises a supporting rotating shaft, an insulating pull rod, a conductive rotating shaft, a rotating seat, a rotating disc, a movable contact conductive rod and a grounding contact device; the invention improves the test efficiency of a withstand voltage test, avoids misoperation and improves safety.

Description

A testing device for GIS interval withstand voltage test

Technical field

The invention relates to a testing device for GIS interval withstand voltage test.

Background technique

Gas insulated metal-enclosed switchgear (GIS, GAS insulated SWITCHGEAR) is a gas-insulated fully enclosed combination electrical appliance, which is composed of circuit breakers, isolating switches, grounding switches, transformers, arresters, busbars, connectors and outlet terminals. These equipment or components All are enclosed in a metal grounded shell, which is filled with a certain pressure of SF6 insulating gas, so it is also called SF6 fully enclosed combined electrical appliances. GIS is widely used not only in high voltage and ultra-high voltage fields, but also in ultra-high voltage fields. Compared with conventional open substations, GIS has the advantages of compact structure, small footprint, high reliability, flexible configuration, and easy installation. , strong safety, strong environmental adaptability and small maintenance workload.

Each component in a GIS requires a certain insulation strength to ensure safety and stability. Therefore, it is an indispensable procedure to conduct a withstand voltage test on the GIS after assembly and before leaving the factory. Patent 201320024694.3 discloses an auxiliary device for pressure test, including a sealed shell, three grounding devices, three propulsion devices, a phase commutation device and an outlet bushing. The three grounding devices are installed inside the upper end of the sealed shell. And a grounding device is correspondingly provided with a propulsion device. The propulsion device is installed outside the sealed housing and acts on the grounding device to ground it; the commutation device includes a moving contact, a transmission shaft and a commutation conductor, and the transmission shaft is installed outside the sealed housing. , connected in conjunction with the movable contact. The movable contact is installed inside the lower end of the closed housing through the insulating pillar. The commutation conductor is installed on the grounding device. In the rotating state, the movable contact is connected to the commutation conductor installed on the grounding device. Through connection; the outlet bushing is installed on the outside of the sealed shell, and is provided with a conductive rod, which is connected to the movable contact. The test process of the above-mentioned auxiliary device is as follows: the closed shell is filled with protective SF ₆ , the GIS is hoisted on the upper end of the closed shell, its three phases are connected to three grounding devices respectively, and the conductive rod of the outlet bushing is connected to the high-voltage test equipment. When testing one phase of the GIS, the moving contact is connected to the commutation conductor, and the ring conductor is connected to the phase of the GIS through the grounding device. At this time, the propulsion device causes the grounding device to break away from contact with the ground, and the other two phases are grounded. The device is grounded and a withstand voltage test is performed. After testing one phase, the rotating shaft drives the movable contact to rotate so that the movable contact is connected to the other commutation conductor. At this time, the propulsion device causes the grounding device to break away from contact with the ground, and The grounding device connected to the other two phases is grounded and a withstand voltage test is performed. It can be seen that in order to maintain the two-phase grounding during the test, the auxiliary device for the voltage test requires two steps for each item of the test. First, the moving contact and the commutation conductor must be connected by rotating the rotating transmission shaft. To ensure continuity, you need to turn the rotating screw of the propulsion device to disconnect one of the grounding devices from the ground. Therefore, the test operation is not fast and convenient. The more operations are performed, the easier it is to cause misoperation. In order to ensure that one phase is connected, the other two phases are grounded. , the connection condition in the sealed housing must be detected every time it is switched.

Therefore, the inventor specially developed a testing device for GIS interval withstand voltage test based on safety and simpler operation.

Contents of the invention

The object of the present invention is to provide a testing device for a GIS interval withstand voltage test, so as to improve the operational convenience of the withstand voltage test, avoid misoperation and improve safety.

In order to achieve the above object, the technical solution of the present invention is as follows:

A test device for GIS interval withstand voltage test, including a sealed shell, an outlet casing, a first conductive rod, a moving end rotating device, a moving end supporting device and a basin insulator;

The moving end support device is located at the right end of the airtight housing and seals the right end of the airtight housing; the basin insulator is located at the left end of the airtight housing and seals the left end of the airtight housing; the outlet bushing is provided at the airtight housing Outside the upper end of the body, the first conductive rod is arranged in the outlet casing, and the first conductive rod extends into the sealed housing and is electrically connected to the moving end support device;

The moving end rotating device includes a supporting rotating shaft, an insulating pull rod, a conductive rotating shaft, a rotating base, a turntable, a moving contact conductive rod and a grounding contact device; wherein the supporting rotating shaft is rotatably installed on the right end of the moving end supporting device, The right end of the supporting rotating shaft protrudes from the right end of the sealed housing. The left end of the supporting rotating shaft is connected to the right end of the insulating tie rod provided in the moving end support device. The conductive rotating base is fixed on the left end of the moving end supporting device and the rotating base passes through the moving end supporting device. It is electrically connected to the first conductive rod, the conductive rotating shaft is rotatably installed on the rotating seat, the left end of the insulating rod is connected to the right end of the conductive rotating shaft, and the left end of the conductive rotating shaft is connected to the turntable;

A movable contact conductive rod and two grounding contact devices are installed on the turntable corresponding to the three metal accessories of the pot-type insulator at equal intervals. The grounding contact device includes an insulating pull rod, a grounding contact seat, and a grounding movable contact device. Contacts and grounding stationary contacts, in which the right end of the insulating pull rod of the grounding contact device is fixed on the turntable, the grounding contact base is installed on the left end of the insulating pull rod of the grounding contact device, and the grounding movable contact is installed on the side of the grounding contact base , and the grounding movable contact contacts the inside of the sealed housing and is grounded, the grounding static contact is installed at the left end of the grounding contact base, and the grounding static contact is in electrical contact with the left side of one of the metal accessories of the basin insulator; so The right end of the movable contact conductive rod is fixed on the turntable, and the left end of the movable contact conductive rod is in electrical contact with the left side of one of the metal accessories of the basin insulator.

The test device also includes a transition short tube, which is fixedly connected to the left side of the basin insulator; a plum blossom contact device is installed on the left side of the metal accessory of the basin insulator. The plum blossom contact device consists of a plum blossom contact. , contact base, contact conductor, guide rod and contact shield. The guide rod is fixed in the middle of the contact base, the plum blossom contact sleeve is set at one end of the contact base, and the contact conductor is fixed at the other end of the contact base. The contact shielding cover is set on the plum blossom contacts and the contact conductors.

The moving end support device includes a cover plate, a support insulating sleeve, a support seat, a shielding cover and a conductive seat. The cover plate is located at the right end of the airtight housing and seals the right end of the airtight housing. A support shaft hole is provided on the cover plate. The support rotation shaft is installed in the support shaft hole; the support insulation sleeve is installed in the sealed housing and its right end is fixed to the cover plate; the support seat is fixed to the left end of the support insulation sleeve; the shielding cover is installed On the support base, the conductive base is fixed on the outside of the upper end of the support base, the first conductive rod is plugged into the conductive base, the rotating base is fixed on the left end of the supporting base, and the insulating rod of the moving end rotating device is inserted through Support inside the insulating sleeve.

The moving end rotation device also includes an insulating rotation handle and an indicator rod, which are both arranged on the right side of the closed shell and installed on the right end of the supporting rotation shaft. A positioning rod for limiting the rotation of the indicator rod is also provided on the outside of the cover plate corresponding to the positions of the three metal accessories of the pot-type insulator.

The right end of the supporting insulating sleeve is fixed to the cover plate via a flange.

The left end of the insulating pull rod and the right end of the conductive rotating shaft of the movable end rotating device are both provided with pin holes, and the insulating pull rod and the conductive rotating shaft are connected by means of the pin shaft.

The rotating base has an axis hole, and a bearing and a spring contact finger are provided in the axis hole. The conductive rotating shaft is penetrated through the axis hole of the rotating base with the help of the bearing and the spring contact finger. There is also a fixed block on the conductive rotating shaft. The retaining ring for bearing sliding on the rotating seat.

The movable contact conductive rod is composed of a second conductive rod, a conductive joint arranged at the tail of the second conductive rod, and a conductive movable contact arranged at the head of the second conductive rod. The conductive joint is fixed to the rotating disk, and the conductive movable contact is in electrical contact with the left side of one of the metal accessories of the basin insulator.

The right side of the metal accessory of the pot-type insulator is provided with a static end contact device for electrical contact with the grounding movable contact and the movable contact conductive rod. The static end contact device is composed of a commutator fixedly connected to the metal accessory. It consists of a transition joint and a static end contact installed on the commutation transition joint.

The inner side of the sealed shell corresponds to the direction of the three metal accessories of the basin insulator and corresponds to one movable contact conductive rod and two grounding contact devices. Three insulating contacts are arranged at equal intervals, and two adjacent insulating contacts are arranged at equal intervals. The angle between the points is 120°.

After adopting the above solution, when the present invention is used for withstand voltage test, the sealed shell is filled with protective gas SF ₆ , and the three phases of the gas-insulated metal-enclosed switchgear are connected to the three accessories on the left side of the basin insulator. A conductive rod is connected to the high-voltage test equipment. When testing one phase of the GIS, the supporting rotating shaft outside the closed shell is operated to drive the insulating pull rod, the conductive rotating shaft and the turntable to rotate. The movable contact conductive rod installed on the turntable It is electrically connected to one of the metal accessories of the pot-type insulator. The first conductive rod sequentially inputs high-voltage electricity (lightning 1050kv, working Frequency 460kv) to the corresponding phase of GIS, and although the two grounding contact devices are also connected to the metal accessories of the basin insulator through the grounding static contact, the grounding movable contact of the grounding contact device is grounded through contact with the inside of the sealed shell. , thus realizing the single-phase withstand voltage test; after testing the phase, rotate the supporting rotating shaft again, and the movable contact conductive rod on the turntable is switched to another metal accessory of the basin insulator, so that the GIS is in contact with the metal accessory. One phase is connected, and the other two phases are not connected. After completing the second phase withstand voltage test, you only need to rotate the supporting rotating shaft once more to make the movable contact conductive rod electrically contact the last untested phase to complete the three phases. test.

The beneficial effects of the present invention are:

1. The present invention only needs (at most) three rotations of the supporting rotating shaft to complete the GIS three-phase voltage test. Each phase switching only needs to be rotated into place at one time. The operation is simple and fast, and the efficiency of the voltage test is improved;

2. The present invention sets the distance (equally spaced) between the movable contact guide rod and the two ground contact devices corresponding to the positions of the three accessories of the pot-type insulator, so that the three contacts on the turntable (i.e., the movable contact device) The position of the head guide rod and the two ground contact devices are relatively fixed, do not affect each other, and can be positioned accurately, avoiding misoperation, achieving stable electrical contact, and improving the stability of the test process.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a cross-sectional view of the overall structure of the present invention;

Figures 2 and 3 are assembly perspective views of the moving end rotating device and the moving end supporting device of the present invention;

Figure 4 is a front view of the partial structure of the present invention;

Figure 5 is a top view of the partial structure of the present invention;

FIG6 is a bottom view of a partial structure of the present invention;

Figure 7 is a cross-sectional view of the moving end rotating device and the moving end supporting device of the present invention;

FIG8 is a cross-sectional view of the sealed housing of the present invention;

FIG9 is a cross-sectional view of a pot-type insulator of the present invention;

Figure 10 is a cross-sectional view of the transition short pipe of the present invention;

Figure 11 is a cross-sectional view of the plum blossom contact device of the present invention;

Figure 12 is a cross-sectional view of the static end contact device of the present invention;

Figure 13 is a cross-sectional view of the GIS basin insulator connected to the present invention;

14 is a schematic diagram of the structure of the present invention for testing non-basin insulator GIS solution;

Figure 15 is a schematic structural diagram of the convex side scheme of connecting GIS basin insulator according to the present invention;

Figure 16 is a schematic structural diagram of the concave side solution of the GIS basin insulator according to the present invention.

Description of symbols

Sealed housing 1, outlet bushing 2, first conductive rod 3, moving end rotating device 4, supporting rotating shaft 41, insulating pull rod 42, conductive rotating shaft 43, rotating base 44, turntable 45, moving contact conductive rod 46, Ground contact device 47, insulated pull rod 471, ground contact seat 472, ground moving contact 473, ground stationary contact 474, insulated rotating handle 48, indicator rod 49, moving end support device 5, cover plate 51, support shaft hole 511 , support insulation sleeve 52, support seat 53, shielding cover 54, conductive seat 55, basin insulator 6, metal accessories 61, static end contact device 62, commutation transition joint 621, static end contact 622, GIS basin insulator 7. Transition short tube 8, plum blossom contact device 9, plum blossom contact 91, contact base 92, contact conductor 93, guide rod 94, contact shield 95, pin 10, bearing 11, spring contact 12, method Lan13.

Implementation

As shown in Figures 1-13, the present invention discloses a test device for GIS interval withstand voltage test, including a sealed shell 1, an outlet sleeve 2, a first conductive rod 3, a moving end rotation device 4, and a moving end support. Device 5 and basin insulator 6;

The moving end support device 5 is located at the right end of the airtight housing 1 and seals the right end of the airtight housing 1. The basin insulator 6 is located at the left end of the airtight housing 1 and seals the left end of the airtight housing 1; the outlet wire The bushing 2 is arranged outside the upper end of the airtight housing 1, the first conductive rod 3 is installed in the outlet casing, and the first conductive rod 3 extends into the airtight housing 1 and is electrically connected to the moving end support device 5;

The above-mentioned moving end rotating device 4 includes a supporting rotating shaft 41, an insulating pull rod 42, a conductive rotating shaft 43, a rotating base 44, a turntable 45, a moving contact conductive rod 46 and a grounding contact device 47; wherein the supporting rotating shaft 41 can rotate through It is located at the right end of the moving end support device 5. The right end of the support rotation shaft 41 extends from the right end of the airtight housing 1. The left end of the support rotation shaft 41 is connected to the right end of the insulating pull rod 42 provided in the moving end support device 5. The conductive rotation base 44 It is fixed on the left end of the moving end support device 5 and the rotating base 44 is electrically connected to the first conductive rod 3 through the moving end supporting device 5. The conductive rotating shaft 43 is rotatably installed in the rotating base 44, and the left end of the insulating pull rod 42 is connected to the conductive rotating shaft 44. The right end of the shaft 43 is connected, and the left end of the conductive rotating shaft 43 is connected to the turntable 45;

A moving contact conductive rod 46 and two grounding contact devices 47 are installed at equal intervals on the turntable 45 corresponding to the three metal accessories 61 of the basin insulator 6. The grounding contact device 47 includes an insulating pull rod 471, a grounding contact seat 472, a grounding moving contact 473 and a grounding static contact 474, wherein the right end of the insulating pull rod 471 of the grounding contact device 47 is fixed on the turntable 45, the grounding contact seat 472 is installed on the left end of the insulating pull rod 471 of the grounding contact device, the grounding moving contact 473 is installed on the side of the grounding contact seat 472, and the grounding moving contact 473 is grounded by contacting the inner side of the closed shell 1, the grounding static contact 474 is installed on the left end of the grounding contact seat 472, and the grounding static contact 474 is electrically contacted with the left side of one of the metal accessories 61 of the basin insulator 6; the right end of the moving contact conductive rod 46 is fixed on the turntable 45, and the left end of the moving contact conductive rod 46 is electrically contacted with the left side of one of the metal accessories 61 of the basin insulator 6.

The above-mentioned moving end support device 5 includes a cover plate 51, a support insulating sleeve 52, a support seat 53, a shielding cover 54 and a conductive seat 55. The cover plate 51 is provided at the right end of the airtight housing 1 and seals the right end of the airtight housing 1. The cover plate 51 is provided with a support shaft hole 511, and the support rotation shaft 41 is passed through the support shaft hole 511; the support insulating sleeve 52 is provided in the sealed housing 1 and its right end is fixed to the cover via a flange 13. Board 51, the support seat 53 is fixed to the left end of the support insulating sleeve 52, the shielding cover 54 is provided on the support seat 53, the conductive seat 55 is fixed on the outside of the upper end of the support seat 53, and the first conductive rod 3 is plugged into the On the conductive base 55, the rotating base 44 is fixed on the left end of the supporting base 53, and the insulating pull rod 42 of the moving end rotating device is inserted into the supporting insulating sleeve 52. In order to facilitate the rotation of the moving end rotating device 4, the moving end rotating device also includes an insulated rotating handle 48 and an indicating rod 49. The insulating rotating handle 48 and the indicating rod 49 are both located on the right side of the closed housing 1 and installed on the supporting rotating shaft 41. At the right end of the cover plate 51 , a positioning rod 56 is provided outside the cover plate 51 corresponding to the three metal accessories 61 of the basin insulator 6 to limit the rotation of the indicating rod 49 .

Further, the test device also includes a transition short tube 8, which is fixedly connected to the left side of the basin insulator 6; a plum blossom contact device 9 is installed on the left side of the basin insulator metal accessory 61. The contact device 9 is composed of a plum blossom contact 91, a contact base 92, a contact conductor 93, a guide rod 94 and a contact shield 95. The guide rod 94 is fixed in the middle of the contact base 92, and the plum blossom contact 91 is set in At one end of the contact base, the contact conductor 93 is fixed at the other end of the contact base 92, and the contact shield 95 is set on the plum blossom contact 91 and the contact conductor 93.

Furthermore, pin holes are provided at the left end of the insulating pull rod 42 and the right end of the conductive rotation shaft 43 of the moving end rotation device. The insulating pull rod and the conductive rotation shaft are connected by the pin shaft 10 .

Furthermore, the rotating base 44 has an axis hole 441, and a bearing 11 and a spring contact finger 12 are provided in the axis hole. The conductive rotating shaft 43 passes through the axis hole 441 of the rotating base with the help of the bearing 11 and the spring contact finger 12. The conductive rotating shaft 43 is also fixed with a retaining ring 13 that blocks the sliding movement of the bearing on the rotating seat.

Further, the movable contact conductive rod 46 is composed of a second conductive rod 461, a conductive joint 462 provided at the tail of the second conductive rod, and a conductive electric contact 463 provided at the head of the second conductive rod 461. The conductive joint 462 is fixedly connected to the turntable 45 , and the conductive electric contact 463 is in electrical contact with the left side of one of the metal accessories 61 of the pot insulator 6 .

As shown in Figure 4, in order to improve the stability of electrical contact, the right side of the pot-type insulator metal accessory 61 is provided with a static end contact device 62 for electrical contact with the grounding movable contact 47 and the movable contact conductive rod 46. The static end contact device 62 is composed of a commutation transition joint 621 fixedly connected to the metal accessory and a static end contact 622 installed on the commutation transition joint 621. The static end contact 622 is used to communicate with the ground. The static contacts 474 or the conductive electric contacts 463 make contact.

Furthermore, three insulating contacts 14 are evenly spaced inside the enclosed housing 1 corresponding to the directions of the three metal accessories 61 of the pot-type insulator and corresponding to a moving contact conductive rod 46 and two grounding contact devices 47, and the angle between two adjacent insulating contacts 14 is 120°.

As shown in Figures 4-6 and 14, it is a solution of the present invention that does not contain the transition short pipe 8. This solution is used to test GIS without basin insulators. When testing one phase of the GIS, the closed shell is operated 1. The external insulated rotating handle 48 rotates the supporting rotating shaft 41, causing it to drive the insulating pull rod 42, the conductive rotating shaft 43 and the turntable 45 to rotate. The movable contact conductive rod 46 installed on the turntable 45 communicates with the static end contact device 62 through the static end contact device 62. One of the metal accessories 61 of the basin insulator 6 is electrically connected. The three phases of the GIS are respectively connected to the three metal accessories 61 of the basin insulator 6 from the left through conductors. At this time, the first conductive rod 3 passes through the conductive seat 55 and the support in turn. The base 53, the conductive rotating shaft 43, the turntable 45, the moving contact conductive rod 46, the static end contact device 62 of the basin insulator 6 and the metal accessories 61 input high-voltage electricity (thunder 1050kv, working frequency 460kv) to GIS correspondence Phase, although the two grounding contact devices 47 also connect to the metal attachment 61 of the basin insulator through the grounding stationary contact 474 and the stationary end contact device 62, the grounding movable contact 473 of the grounding contact device passes through the sealed shell 1 The inner side is in contact and grounded, so that the two phases are in a grounded state, and the single-phase withstand voltage test is realized; after testing the phase, the insulated rotating handle 48 is again rotated to support the rotating shaft 41, and the movable contact conductive rod 46 on the turntable 45 Switch to another metal accessory 61 of the pot-type insulator, so that one phase of the GIS in contact with the metal accessory is conductive, and the other two phases are not conductive. After completing the second phase withstand voltage test, you only need to rotate the insulating rotating handle 48 again Once the rotating shaft 41 is supported and the movable contact conductive rod 46 is electrically contacted with the last untested phase, the three-phase test can be completed.

As shown in Figure 15, it is a solution containing the transition short pipe 8 of the present invention. The testing steps of this solution are basically the same as those of the solution without the transition short pipe 8. The difference is that the GIS targeted is different. This solution is used for Test the GIS with the basin insulator 7, and the connection method is to connect the convex side of the basin insulator 7. In order to connect the conductor 71 of the basin insulator 7 more stably and conveniently, the present invention also provides a plum blossom contact on the left side of the basin insulator 6 Device 9.

As shown in Figure 16, it is another solution of the present invention containing the transition short pipe 8. The test steps of this solution are basically the same as those of the solution without the transition short pipe 8. The difference is that the GIS targeted is different. This solution uses For testing the GIS with basin insulator 7, and the connection method is to connect the concave side of basin insulator 7.

The above are only specific embodiments of the present invention and do not limit the scope of the present invention. All equivalent changes made based on the design ideas of this case fall within the scope of protection of this case.

Claims (8)

1. A test device for GIS interval withstand voltage test, characterized by: including a sealed shell, an outlet bushing, a first conductive rod, a moving end rotation device, a moving end support device and a basin insulator; The moving end support device is located at the right end of the airtight housing and seals the right end of the airtight housing; the basin insulator is located at the left end of the airtight housing and seals the left end of the airtight housing; the outlet bushing is provided at the airtight housing Outside the upper end of the body, the first conductive rod is arranged in the outlet casing, and the first conductive rod extends into the sealed housing and is electrically connected to the moving end support device; The movable end rotating device comprises a supporting rotating shaft, an insulating pull rod, a conductive rotating shaft, a rotating seat, a rotating disk, a movable contact conductive rod and a grounding contact device; wherein the supporting rotating shaft is rotatably arranged at the right end of the movable end supporting device, the right end of the supporting rotating shaft extends out from the right end of the sealed shell, the left end of the supporting rotating shaft is connected to the right end of the insulating pull rod arranged in the movable end supporting device, the conductive rotating seat is fixed to the left end of the movable end supporting device and the rotating seat is electrically connected to the first conductive rod through the movable end supporting device, the conductive rotating shaft is rotatably arranged at the rotating seat, the left end of the insulating pull rod is connected to the right end of the conductive rotating shaft, and the left end of the conductive rotating shaft is connected to the rotating disk; A movable contact conductive rod and two grounding contact devices are installed on the turntable corresponding to the three metal accessories of the pot-type insulator at equal intervals. The grounding contact device includes an insulating pull rod, a grounding contact seat, and a grounding movable contact device. Contacts and grounding stationary contacts, in which the right end of the insulating pull rod of the grounding contact device is fixed on the turntable, the grounding contact base is installed on the left end of the insulating pull rod of the grounding contact device, and the grounding movable contact is installed on the side of the grounding contact base , and the grounding movable contact contacts the inside of the sealed housing and is grounded, the grounding static contact is installed at the left end of the grounding contact base, and the grounding static contact is in electrical contact with the left side of one of the metal accessories of the basin insulator; so The right end of the movable contact conductive rod is fixed on the turntable, and the left end of the movable contact conductive rod is in electrical contact with the left side of one of the metal accessories of the basin insulator; the test device also includes a transition short tube, which is fixedly connected to The left side of the basin insulator; a plum blossom contact device is installed on the left side of the metal accessory of the basin insulator. The plum blossom contact device consists of a plum blossom contact, a contact base, a contact conductor, a guide rod and a contact shield. , the guide rod is fixed in the middle of the contact base, the plum blossom contact is set on one end of the contact base, the contact conductor is fixed on the other end of the contact base, and the contact shielding cover is set on the plum blossom contact and the contact conductor; so The moving end support device includes a cover plate, a support insulating sleeve, a support seat, a shielding cover and a conductive seat. The cover plate is located at the right end of the airtight housing and seals the right end of the airtight housing. A support shaft hole is provided on the cover plate, so The support rotation shaft is passed through the support shaft hole; the support insulating sleeve is set in the sealed housing and its right end is fixed to the cover plate; the support seat is fixed to the left end of the support insulating sleeve; the shielding cover is set in On the support base, the conductive base is fixed on the outside of the upper end of the support base, the first conductive rod is plugged into the conductive base, the rotating base is fixed on the left end of the supporting base, and the insulating tie rod of the moving end rotating device is passed through the supporting base. Inside the insulation sleeve. 2. A GIS interval withstand voltage test test device as described in claim 1, characterized in that: the moving end rotation device also includes an insulating rotation handle and an indicator rod, the insulating rotation handle and the indicator rod are both arranged on the right side of the closed shell and installed on the right end of the supporting rotation shaft, and a positioning rod for limiting the rotation of the indicator rod is also provided on the outside of the cover plate corresponding to the positions of the three metal accessories of the pot-type insulator. 3. A GIS interval withstand voltage test device as described in claim 1, characterized in that the right end of the supporting insulating sleeve is fixed to the cover plate by means of a flange. 4. A GIS interval withstand voltage test device as described in claim 1, characterized in that: pin holes are provided at the left end of the insulating pull rod and the right end of the conductive rotating shaft of the movable end rotating device, and the insulating pull rod and the conductive rotating shaft are connected by means of a pin shaft. 5. A testing device for GIS interval pressure test as claimed in claim 1, characterized in that: the rotating seat is provided with an axis hole, and a bearing and a spring contact finger are provided in the axis hole, and the conductive rotating shaft is The bearing and the spring contact finger pass through the shaft hole of the rotating base, and the conductive rotating shaft is also fixed with a retaining ring that blocks the sliding movement of the bearing on the rotating base. 6. A testing device for GIS interval withstand voltage test as claimed in claim 1, characterized in that: the movable contact conductive rod is composed of a second conductive rod and a conductive joint arranged at the tail of the second conductive rod. It consists of a conductive electric contact at the head of the second conductive rod, the conductive joint is fixed to the turntable, and the conductive electric contact is in electrical contact with the left side of one of the metal accessories of the basin insulator. 7. A testing device for GIS interval withstand voltage test as claimed in claim 1, characterized in that: the right side of the metal accessory of the pot-type insulator is provided with a grounding movable contact and a movable contact conductive rod for electrical contact The static end contact device is composed of a commutation transition joint fixedly connected to the metal accessory and a static end contact installed on the commutation transition joint. 8. A testing device for GIS interval withstand voltage test according to claim 1, characterized in that: the inside of the sealed shell corresponds to the direction of the three metal accessories of the basin insulator and corresponds to a moving contact. The head conductive rod and the two ground contact devices are provided with three insulating contacts at equal intervals, and the angle between two adjacent insulating contacts is 120°.