CN106324457B - Withstand voltage testing device for insulating part - Google Patents

Abstract

The invention discloses an insulating part withstand voltage testing device which comprises a testing main body, a power transmission rod and a plurality of insulating parts, wherein the testing main body is provided with a plurality of power transmission rods; a closed cavity is formed in the test main body, the closed cavity is filled with test insulating gas SF6, and the power-on rod is arranged in the closed cavity; the insulating pieces are arranged in the closed cavity, the insulating pieces are connected in parallel, one ends of the insulating pieces are respectively connected with the power-on rod, and the other ends of the insulating pieces are respectively grounded. The invention can improve the efficiency of the voltage withstand test of the insulating part and improve the reliability of the test.

Description

A device for withstand voltage testing of insulating parts

technical field

The invention relates to the technical field of withstand voltage testing of insulating parts of high-voltage switchgear, in particular to an insulating part withstand voltage testing device.

Background technique

In the technical field of high-voltage switchgear, the withstand voltage performance of the insulating parts directly affects the safety of the high-voltage switchgear. Therefore, it is necessary to perform a withstand voltage test on the insulating parts of the high-voltage switchgear.

In the prior art, the method for withstand voltage testing of insulating parts in high-voltage switchgear is usually: first install the insulating parts in high-voltage switchgear for testing. When a certain insulating part is broken down, all insulating parts need to be eliminated one by one, and the test efficiency is relatively low.

In view of this, in order to improve the efficiency of withstand voltage testing of insulating parts, it is necessary to conduct withstand voltage testing before installing insulating parts in high-voltage switchgear, and this case arises from this.

Contents of the invention

The object of the present invention is to provide a device for withstand voltage testing of insulating parts, so as to improve the efficiency of withstand voltage testing of insulating parts and improve the reliability of the test.

To achieve the above object, the solution of the present invention is:

A device for withstand voltage testing of insulators, including a test body, a power rod and a plurality of insulators; a closed cavity is formed in the test body, and the sealed cavity is filled with a test insulating gas SF6, and the power rod is installed in the closed cavity In the middle; a plurality of insulators are installed in the airtight cavity, the plurality of insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the current pole, and the other ends of the plurality of insulators are respectively grounded.

Further, it also includes a conductive seat, an inner groove is provided at the lower end of the energizing rod, the upper end of the conductive seat is inserted into the inner groove, a compression spring is installed between the upper end of the conductive seat and the inner groove of the energizing rod, and the lower end of the conductive seat is connected to a plurality of insulators. file connection.

Further, an opening is formed on the side wall of the test body, a cover plate is sealed and installed on the opening, and a three-way self-sealing valve is installed on the cover plate. The three-way self-sealing valve communicates with the sealed cavity, and SF6 gas enters the airtight chamber through the three-way self-sealing valve. Cavity, install SF6 pressure gauge on the three-way self-sealing valve.

Further, the test body includes a casing, a casing and a frame, and a closed cavity is formed in the casing, the casing is installed on the upper end of the casing through a transition flange, and the power rod is installed in the casing and extends to the closed cavity of the casing Among them, a shielding cover is provided at the connection between the casing and the housing, and the shielding cover surrounds the lower end of the power pole; the lower end of the housing is installed on the frame through a fixing plate.

Further, the insulator is an insulating disc, a plurality of insulating discs are stacked, a support ring is provided on the peripheral part between the insulating discs, a shielding ring and a compression spring are provided in the middle part between the insulating discs, and the middle parts of the multiple insulating discs are separated by conductors. It is connected with the conductive seat, and the peripheral parts of the plurality of insulating discs are grounded through the screw rod.

Further, the uppermost insulating disc of the plurality of stacked insulating discs is connected to the conductive base through the connecting block.

Further, a lower support ring is installed on the lowermost insulating disc of the plurality of stacked insulating discs, the screw rod is connected to the lower supporting ring, and the lower supporting ring is grounded; a shielding cover is installed on the conductor connected to the conductive seat on the lowermost insulating disc, The shield is placed in the lower support ring.

Further, an upper support ring is installed on the uppermost insulating disc of the plurality of stacked insulating discs, the upper end of the screw is screwed on the upper support ring, and a shielding nut is installed on the upper end of the screw.

Further, the insulator is an insulating platform, a plurality of insulating platforms are stacked, one end of the plurality of insulating platforms is connected to the conductive seat through a conductive rod, and the other end of the plurality of insulating platforms is grounded through another conductive rod.

Further, the insulator is an insulating pull rod, a plurality of insulating pull rods are arranged side by side, the upper ends of the plurality of insulating pull rods are installed on the upper positioning plate, the upper positioning plate is connected to the conductive seat through a conductive block, and a shielding cover is arranged on the periphery of the upper positioning plate The lower ends of the plurality of insulating pull rods are installed on the lower positioning plate, the lower positioning plate is installed on the lower supporting ring, and the lower supporting ring is grounded.

Further, the insulator is an insulating pull rod, and a plurality of insulating pull rods are arranged side by side. The upper ends of the plurality of insulating pull rods are installed on the upper positioning plate. The upper positioning plate is connected to the conductive seat through a conductive rod, and a shielding cover is provided on the periphery of the upper positioning plate. The lower ends of the plurality of insulating pull rods are installed on the lower positioning plate, the lower positioning plate is installed on the lower supporting ring, and the lower supporting ring is grounded.

After adopting the above scheme, a closed cavity is formed in the test body of the present invention, and the test insulating gas SF6 is filled in the closed cavity, and the conductive rod is installed in the closed cavity; a plurality of insulators are installed in the closed cavity, the multiple Two insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the current pole, and the other ends of the multiple insulators are respectively grounded. Whether the piece is broken down.

The invention can carry out withstand voltage test before the insulating part is installed in the high-voltage switchgear, and can test a plurality of insulating parts at one time, can improve the efficiency of the insulating part withstand voltage test, and improve the reliability of the test.

Description of drawings

Fig. 1 is the structural representation of test insulation platform of the present invention;

Fig. 1 a is the sectional view of Fig. 1A-A direction;

Fig. 2 is a schematic structural view of another angle of the test insulation platform of the present invention;

Fig. 3 is the structural entity diagram of the test insulating disk of the present invention;

Fig. 4 is a schematic structural view of testing a longer insulating pull rod in the present invention;

Fig. 4a is the sectional view of Fig. 4A-A direction;

5 to 7 are structural schematic diagrams of testing different types of shorter insulating pull rods according to the present invention.

Label description

Test body 1 sealed cavity 11

Opening 12 Cover 13

Three-way self-sealing valve 14 SF6 pressure gauge 15.

Housing 16 Fixed plate 161

Sleeve 17 Transition flange 171

Frame body 18 power pole 2

Inner Groove 21 Insulator 3

Insulation table 31 conductive rod (311, 312)

Insulation disc 32 Support ring 321

Shield ring 322 Compression spring 323

Screw rod 324 Lower support ring 325

Shielding cover 326 Upper support ring 327

Shield nut 328 Conductive seat 4

Compression spring 5 Shield 6.

Detailed ways

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

Please refer to FIG. 1 to FIG. 7 , a device for withstand voltage testing of an insulator disclosed in the present invention includes a test body 1 , a power pole 2 and a plurality of insulators 3 .

An airtight cavity 11 is formed in the test body 1 , and the airtight cavity 11 is filled with a test insulating gas SF6 , and the electrification rod 2 is installed in the airtight cavity 11 . A plurality of insulators 3 are installed in the airtight cavity 11 , the plurality of insulators 3 are connected in parallel, one end of the plurality of insulators 3 is respectively connected to the current pole 2 , and the other ends of the plurality of insulators 3 are respectively grounded.

When testing the withstand voltage performance of the insulator 3, adjust the voltage of the power pole 2 to the test voltage to determine whether the insulator 3 is broken down. The present invention can carry out the withstand voltage test before the insulator 3 is installed in the high-voltage switchgear, and can test a plurality of insulators 3 at a time, which can improve the efficiency of the withstand voltage test of the insulator 3 and improve the reliability of the test.

The present invention also includes a conductive seat 4, as shown in Figure 2, an inner groove 21 is set at the lower end of the power-on rod 2, the upper end of the conductive seat 4 is inserted into the inner groove 21, and the upper end of the conductive seat 4 is connected to the inner groove of the power-on rod 2. A compression spring 5 is installed between 21, and the lower end of the conductive seat 4 is connected to a plurality of insulators 3. Due to the effect of the compression spring 5, the connection error between the conductive seat 4 and the insulator 3 can be compensated, and there is usually a connection tolerance during the test. , The compression spring 5 can effectively compensate, making the contact better.

An opening 12 is formed on the side wall of the test body 1, and a cover plate 13 is sealed and installed on the opening 12. A three-way self-sealing valve 14 is installed on the cover plate 13. The three-way self-sealing valve 14 communicates with the airtight cavity 11, and SF6 gas passes through the The three-way self-sealing valve 14 enters the airtight cavity 11, and an SF6 pressure gauge 15 is installed on the three-way self-sealing valve 14.

The test body 1 includes a housing 16, a sleeve 17 and a frame body 18. A closed cavity 11 is formed in the housing 16. The sleeve 17 is installed on the upper end of the housing 16 through a transition flange 171. The power rod 2 is installed in the sleeve 17. And extend to the airtight cavity 11 of the housing 16, the shielding cover 6 is set at the connection between the casing 17 and the housing 16, and the shielding cover 6 surrounds the lower end of the power pole 2; the lower end of the housing 16 is installed on the frame through the fixing plate 161 On the body 18, the test body structure is convenient for installation and testing.

As shown in Figures 1 to 2, the insulator 3 is an insulating platform 31, and a plurality of insulating platforms 31 are stacked, and three insulating platforms 31 are shown in the figure, and one end of the plurality of insulating platforms 31 is connected with a conductive rod 311. The conductive bases 4 are connected, and the other ends of the plurality of insulating platforms 31 are grounded through another conductive rod 312 . Wherein, one end of the conductive rod 311 is connected to the upper end of the upper insulating platform 31, the other end of the conductive rod 311 is connected to the lower end of the intermediate insulating platform 31 and the upper end of the lower insulating platform 31, and the lower end of the lower insulating platform 31 is grounded; one end of the conductive rod 312 is connected to the upper insulating The lower end of the platform 31, the upper end of the intermediate insulating platform 31, and the other end of the conductive rod 312 are grounded.

As shown in Figure 3, the insulator 3 is an insulating disc 32, a plurality of insulating discs 32 are stacked, a support ring 321 is provided on the peripheral part between the insulating discs 32, and a shielding ring 322 and a compression spring are provided on the middle part between the insulating discs 32 323, the compression spring 323 makes the installation error between the insulating discs 32 smaller, the middle parts of the plurality of insulating discs 32 are respectively connected to the conductive seat 4 through conductors, and the peripheral parts of the plurality of insulating discs 32 are grounded through the screw rod 324.

In this embodiment, the uppermost insulating disc 32 of the plurality of stacked insulating discs 32 is connected to the conductive seat 4 through the connecting block 41 .

A lower supporting ring 325 is installed on the lowermost insulating disc 32 of a plurality of insulating discs 32 stacked, the screw rod 324 is connected with the lower supporting ring 325, and the lower supporting ring 325 is grounded; A shielding case 326 is installed on the conductor, and the shielding case 326 is placed in the lower supporting ring 325 .

The uppermost insulating disc 32 of the plurality of stacked insulating discs 32 is installed with an upper supporting ring 327 , the upper end of the screw 324 is screwed on the upper supporting ring 327 , and a shielding nut 328 is installed at the upper end of the screw 324 .

As shown in Figure 4 and Figure 4a, the insulator 3 is an insulating pull rod 33, and a plurality of insulating pull rods 33 are arranged side by side. As shown in Figure 4a, five insulating pull rods 33 can be set. In this embodiment, the insulating pull rod 33 is longer , the upper ends of the plurality of insulating pull rods 33 are installed on the upper positioning plate 331, the upper positioning plate 331 is connected with the conductive seat 4 through the conductive block 332, and a shielding cover 333 is arranged on the periphery of the upper positioning plate 331; the lower ends of the plurality of insulating pull rods 33 Installed on the lower positioning plate 334, the lower positioning plate 334 is installed on the lower supporting ring 335, and the lower supporting ring 335 is grounded.

As shown in Figures 5 to 7, the insulating pull rod 33 is relatively short, and a plurality of insulating pull rods 33 are arranged side by side. Seat 4 is connected, and shield cover 333 is set on upper positioning plate 331 periphery; 5 to 7 show three different types of shorter insulating pull rods 33 .

The above descriptions are only preferred embodiments of the present invention, and are not limitations on the design of this case. All equivalent changes made according to the key points of the design of this case fall within the scope of protection of this case.

Claims (6)

1. A device for withstand voltage testing of insulating parts, characterized in that: it comprises a test body, a energizing rod and a plurality of insulators; a sealed cavity is formed in the testing body, and the test insulating gas SF6 is filled in the sealed cavity, and the energizing rod Installed in the airtight cavity; a plurality of insulators are installed in the airtight cavity, the plurality of insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the power pole, and the other ends of the plurality of insulators are respectively grounded; The device for withstand voltage test of an insulating part also includes a conductive seat, an inner groove is provided at the lower end of the energizing rod, the upper end of the conductive seat is inserted into the inner groove, and a compression device is installed between the upper end of the conductive seat and the inner groove of the energizing rod. A spring, the lower end of the conductive seat is connected to a plurality of insulators; The insulator is an insulating disc, and a plurality of insulating discs are stacked. A supporting ring is arranged on the peripheral part between the insulating discs, and a shielding ring and a compression spring are arranged in the middle part between the insulating discs. The peripheral parts of multiple insulating discs are grounded through the screw rod; the lower support ring is installed on the lowermost insulating disc of the stacked insulating discs, the screw rod is connected with the lower support ring, and the lower support ring is grounded; the lowermost insulating disc A shielding cover is installed on the conductor connected to the conductive seat, and the shielding cover is placed in the lower supporting ring; the uppermost insulating disc of the stacked insulating discs is installed with the upper supporting ring, and the upper end of the screw is screwed on the upper supporting ring, and in the A shielding nut is installed on the upper end of the screw; The test body consists of a casing, a casing and a frame. A closed cavity is formed in the casing. The casing is installed on the upper end of the casing through a transition flange. The power rod is installed in the casing and extends into the closed cavity of the casing. A shielding cover is arranged at the joint between the casing and the shell, and the shielding cover surrounds the lower end of the power pole; the lower end of the shell is installed on the frame body through the fixing plate. 2 . The device for withstand voltage testing of an insulator according to claim 1 , wherein the uppermost insulating disc of the plurality of stacked insulating discs is connected to the conductive seat through a connecting block. 3 . 3. An insulator withstand voltage test device, characterized in that: it includes a test body, a energizing rod and a plurality of insulators; a closed cavity is formed in the test body, and the test insulating gas SF6 is filled in the closed cavity, and the energizing rod Installed in the airtight cavity; a plurality of insulators are installed in the airtight cavity, the plurality of insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the power pole, and the other ends of the plurality of insulators are respectively grounded; The device for withstand voltage test of an insulating part also includes a conductive seat, an inner groove is provided at the lower end of the energizing rod, the upper end of the conductive seat is inserted into the inner groove, and a compression device is installed between the upper end of the conductive seat and the inner groove of the energizing rod. A spring, the lower end of the conductive seat is connected to a plurality of insulators; The insulator is an insulating platform, and a plurality of insulating platforms are stacked. One end of the plurality of insulating platforms is connected to the conductive base through a conductive rod, and the other end of the plurality of insulating platforms is grounded through another conductive rod; one end of the conductive rod is connected to the ground. The upper end of the upper insulating platform, and the other end of the conductive rod is connected to the lower end of the intermediate insulating platform and the upper end of the lower insulating platform, and the lower end of the lower insulating platform is grounded; one end of the other conductive rod is connected to the lower end of the upper insulating platform and the upper end of the intermediate insulating platform , the other end of the other conductive rod is grounded; The test body consists of a casing, a casing and a frame. A closed cavity is formed in the casing. The casing is installed on the upper end of the casing through a transition flange. The power rod is installed in the casing and extends into the closed cavity of the casing. A shielding cover is arranged at the joint between the casing and the shell, and the shielding cover surrounds the lower end of the power pole; the lower end of the shell is installed on the frame body through the fixing plate. 4. An insulator withstand voltage test device, characterized in that: it includes a test body, a energization rod and a plurality of insulators; a closed cavity is formed in the test body, and the test insulating gas SF6 is filled in the airtight cavity, and the energization rod Installed in the airtight cavity; a plurality of insulators are installed in the airtight cavity, the plurality of insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the power pole, and the other ends of the plurality of insulators are respectively grounded; The device for withstand voltage test of an insulating part also includes a conductive seat, an inner groove is provided at the lower end of the energizing rod, the upper end of the conductive seat is inserted into the inner groove, and a compression device is installed between the upper end of the conductive seat and the inner groove of the energizing rod. A spring, the lower end of the conductive seat is connected to a plurality of insulators; The insulator is an insulating pull rod, and a plurality of insulating pull rods are arranged side by side. The upper ends of the plurality of insulating pull rods are installed on the upper positioning plate. The upper positioning plate is connected to the conductive seat through a conductive block, and a shielding cover is arranged on the periphery of the upper positioning plate; The lower ends of a plurality of insulating pull rods are installed on the lower positioning plate, the lower positioning plate is installed on the lower supporting ring, and the lower supporting ring is grounded; The test body consists of a casing, a casing and a frame. A closed cavity is formed in the casing. The casing is installed on the upper end of the casing through a transition flange. The power rod is installed in the casing and extends into the closed cavity of the casing. A shielding cover is arranged at the joint between the casing and the shell, and the shielding cover surrounds the lower end of the power pole; the lower end of the shell is installed on the frame body through the fixing plate. 5. An insulator withstand voltage test device, characterized in that: it includes a test body, a power rod and a plurality of insulators; a closed cavity is formed in the test body, and the test insulating gas SF6 is filled in the closed cavity, and the power rod Installed in the airtight cavity; a plurality of insulators are installed in the airtight cavity, the plurality of insulators are connected in parallel, one end of the plurality of insulators is respectively connected to the power pole, and the other ends of the plurality of insulators are respectively grounded; The device for withstand voltage test of an insulating part also includes a conductive seat, an inner groove is provided at the lower end of the energizing rod, the upper end of the conductive seat is inserted into the inner groove, and a compression device is installed between the upper end of the conductive seat and the inner groove of the energizing rod. A spring, the lower end of the conductive seat is connected to a plurality of insulators; The insulator is an insulating pull rod, and a plurality of insulating pull rods are arranged side by side. The upper ends of the plurality of insulating pull rods are installed on the upper positioning plate. The lower ends of a plurality of insulating pull rods are installed on the lower positioning plate, the lower positioning plate is installed on the lower supporting ring, and the lower supporting ring is grounded; The test body consists of a casing, a casing and a frame. A closed cavity is formed in the casing. The casing is installed on the upper end of the casing through a transition flange. The power rod is installed in the casing and extends into the closed cavity of the casing. A shielding cover is arranged at the joint between the casing and the shell, and the shielding cover surrounds the lower end of the power pole; the lower end of the shell is installed on the frame body through the fixing plate. 6. A kind of insulator withstand voltage testing device as claimed in claim 1 or 3 or 4 or 5, characterized in that: an opening is formed on the side wall of the test body, a cover plate is sealed and installed on the opening, and the cover plate Install a three-way self-sealing valve, the three-way self-sealing valve is connected to the closed cavity, SF6 gas enters the closed cavity through the three-way self-sealing valve, and an SF6 pressure gauge is installed on the three-way self-sealing valve.