CN108312087B

CN108312087B - Assembling tool for GIL post insulator test

Info

Publication number: CN108312087B
Application number: CN201711483600.8A
Authority: CN
Inventors: 朱朝发; 王玉杰; 郭明璞; 陈春辉; 高威昊
Original assignee: State Grid Corp of China SGCC; Pinggao Group Co Ltd; Henan Pinggao Electric Co Ltd
Current assignee: State Grid Corp of China SGCC; Pinggao Group Co Ltd; Henan Pinggao Electric Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-04-07
Anticipated expiration: 2037-12-29
Also published as: CN108312087A

Abstract

The invention relates to an assembly tool for a GIL post insulator test, which comprises a tool cylinder body for installing a post insulator to be tested, wherein the tool cylinder body is provided with a grounding structure and a supporting leg connecting structure which is used for fixing a supporting leg insert on the post insulator and is in conductive connection with the supporting leg insert; the assembling tool further comprises switching electrodes which are respectively buckled at two axial ends of the supporting cylinder insert on the post insulator, and conductive connecting structures matched with the switching electrodes on the adjacent post insulators are arranged on the switching electrodes. During testing, the switching electrode is arranged on the post insulator, then the post insulator is arranged in the tool cylinder, all the post insulators are electrically connected through the connecting structure matched with the switching electrode, the tool cylinder is grounded, the switching electrode is connected with the high-voltage end of the experimental device, and then a power frequency withstand voltage test can be carried out. Compared with the prior art, the testing device has the advantages that the structure is simple, more than two post insulators can be tested through one-time assembly, and the testing efficiency is higher.

Description

Assembling tool for GIL post insulator test

Technical Field

The invention relates to an assembling tool for a GIL post insulator test in the field of gas insulated metal closed transmission lines.

Background

The GXL5-1100kV fixed/sliding three-post insulator is good in supporting effect, saves materials, is widely applied to megavolt GXL, and is a core insulating part of GIL; in an 1100kV power supply system, the main function is to well support the conducting rod, but the reliability of the insulation plays a crucial role. For example, a three-post insulator for a gas insulated bus disclosed in chinese utility model patent publication No. CN205384910 and publication No. 2016.07.13, includes a base body for plug-in connection with a conductive rod and three insulated posts arranged on the base body at equal intervals, a support barrel insert is coaxially arranged in the base body, and a leg insert is arranged at an end of the insulated post; by replacing the leg insert, the type of the three-post insulator, namely a fixed post insulator or a sliding post insulator, can be changed. Before the three-post insulator leaves a factory, a power frequency withstand voltage test needs to be carried out and the local discharge capacity of the three-post insulator is accurately measured; when the test is carried out, the assembling tool for the test is needed, the existing assembling tool for the test is a single test, and the test efficiency is low.

Disclosure of Invention

The invention aims to provide an assembly tool for a GIL post insulator test with high test efficiency.

In order to achieve the purpose, the scheme 1 of the assembling tool for the GIL post insulator test is as follows: the assembly tool for the GIL post insulator test comprises a tool cylinder body for installing a post insulator to be tested, wherein the tool cylinder body is provided with a grounding structure and a supporting leg connecting structure which is used for fixing a supporting leg insert on the post insulator and is in conductive connection with the supporting leg insert; the assembling tool further comprises switching electrodes which are respectively buckled at two axial ends of the supporting cylinder insert on the post insulator, and conductive connecting structures matched with the switching electrodes on the adjacent post insulators are arranged on the switching electrodes.

Scheme 2 is, according to the assembly fixture of scheme 1, the assembly fixture still includes the electrically conductive pull rod that is arranged in installing support section of thick bamboo inserts and axial connection two switching electrodes.

Scheme 3 is, according to scheme 2 the assembly fixture, the both ends of electrically conductive pull rod outwards stretch out respectively and correspond the switching electrode, and the one end of electrically conductive pull rod is equipped with the jack that supplies the corresponding end of electrically conductive pull rod to insert on the adjacent post insulator.

Scheme 4 is, according to the assembly fixture of scheme 3, the swivel electrode in the periphery of conducting rod is equipped with the shoulder hole, the shoulder hole have supply the nut to install the minor diameter portion and the diameter with the major diameter portion of the external diameter looks adaptation of conducting rod.

Scheme 5 is, according to scheme 4 the assembly fixture, the assembly fixture still including set up the spring that supplies the conductive pull rod on the adjacent post insulator to connect in the jack on the conductive pull rod.

Scheme 6 is, according to the assembly fixture of scheme 2, be equipped with on the switching electrode and be used for detaining the groove of establishing support section of thick bamboo inserts axial tip.

Scheme 7 is that, according to the assembly fixture of any one of schemes 1 to 6, the assembly fixture further comprises a conducting rod for connecting a high-voltage end of the test device with the transfer electrode.

Scheme 8 is the assembly fixture of any one of schemes 1 to 6, wherein the fixture cylinder is formed by more than two cylinder units which are arranged in parallel along the axial direction and detachably connected.

Scheme 9 is the assembly fixture according to any one of schemes 1 to 6, wherein the fixture cylinder is provided with two or more positioning holes arranged at intervals around an axis thereof, the assembly fixture further comprises a leg connecting block for being mounted in the positioning holes, the leg connecting block is provided with an insertion portion for being inserted into the positioning holes and a flange arranged at an end portion of the insertion portion for being in stop fit with an outer wall of the fixture cylinder, the insertion portion is provided with a central hole for mounting a connecting bolt, and the leg connecting block and the connecting bolt form the leg connecting structure.

Solution 10 is the assembly fixture according to solution 9, wherein the leg connecting portion further has an insertion end for being inserted into a cavity of a corresponding leg insert on the post insulator.

The invention has the beneficial effects that: during testing, the switching electrode is arranged on the post insulator, then the post insulator is arranged in the tool cylinder, all the post insulators are electrically connected through the connecting structure matched with the switching electrode, the tool cylinder is grounded, the switching electrode is connected with the high-voltage end of the experimental device, and then a power frequency withstand voltage test can be carried out. Compared with the prior art, the testing device has the advantages that the structure is simple, more than two post insulators can be tested through one-time assembly, and the testing efficiency is higher.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the assembling tool for the GIL post insulator test of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

fig. 4 is an enlarged view of fig. 1 at C.

In the figure: the method comprises the following steps of 1-a fixed three-post insulator, 2-a sliding three-post insulator, 3-a tooling cylinder, 4-a cylinder unit, 5-a convex adapter electrode, 6-a concave adapter electrode, 7-a conductive pull rod, 8-a spring, 9-a fixed leg insert, 10-a sliding leg insert, 11-a connecting screw, 12-a supporting cylinder insert, 13-a first leg connecting block, 14-a second leg connecting block, 15-a nut and 16-a conductive rod.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

According to the first embodiment of the assembly tool for the GIL post insulator test, as shown in fig. 1 to 4, the rotating assembly tool can be used for installing a fixed three-post insulator 1 and a sliding three-post insulator 2, a fixed supporting leg insert 9 is arranged on the fixed three-post insulator 1, a sliding supporting leg insert 10 is arranged in the sliding three-post insulator 2, threaded holes for connecting screws 11 are formed in the two supporting leg inserts, a concave cavity is further formed in the sliding supporting leg insert 10, and the threaded holes are formed in the bottom wall of the concave cavity. The assembly fixture comprises a fixture cylinder 3 for mounting the three-post insulator, a supporting leg connecting block for fixing the three-post insulator, a switching electrode for connecting adjacent post insulators, a conductive pull rod 7 for axially tensioning the switching electrode and a conductive rod 16 for connecting a high-voltage end of the test device with the outermost switching electrode.

The tool cylinder 3 is formed by four cylinder units 4 which are axially arranged in parallel and detachably connected, the axial length of each cylinder unit 4 is close to that of a single three-post insulator, and only one three-post insulator is mounted on one cylinder unit 4. The inner diameter of the cylinder unit 4 is larger than the outer diameter of the three-post insulator, three positioning holes are formed in the side wall of the cylinder unit 4 at equal intervals around the axis of the cylinder unit, supporting leg connecting blocks used for fixing and conducting connection of supporting leg inserts on the three-post insulator are arranged in the positioning holes, and each supporting leg connecting block comprises a first supporting leg connecting block 13 used for fixing a fixed supporting leg insert 9 and a second supporting leg connecting block 14 used for fixing a sliding supporting leg insert 10.

The first and second supporting leg connecting blocks 14 respectively comprise an inserting part for inserting into the positioning hole and a flange arranged at the end part of the inserting part for stopping the outer wall of the tool cylinder 3, and the inserting part is provided with a central hole for installing the connecting screw 11; the insert part of the second leg attachment block 14 is longer and the inner end of the insert part is provided with a cavity for inserting the sliding leg insert 10.

The switching electrode comprises a convex switching electrode 5 arranged at the left end of a supporting cylinder insert 12 of each post insulator and a concave switching electrode 6 arranged at the left end, the convex switching electrode and the concave switching electrode are respectively provided with a groove used for buckling the end part of the supporting cylinder insert 12, and the convex switching electrode and the concave switching electrode are connected in an axial tensioning mode through a conductive pull rod 7 coaxially arranged in the supporting cylinder insert 12. The two ends of the conductive pull rod 7 respectively extend out of the convex and concave switching electrodes, the left end of the conductive pull rod 7 is a big end for blocking the convex switching electrode 5, and the right end is fixedly connected with the concave switching electrode 6 through a nut 15.

The left end of the conductive pull rod 7 is provided with an insertion hole for inserting the right end of the conductive pull rod 7 on the adjacent post insulator, and a spring 8 is arranged in the insertion hole; the concave adapter electrode 6 is provided with a stepped hole at the periphery of the conductive pull rod 7, the stepped hole is provided with a small diameter part and a large diameter part with the diameter matched with the outer diameter of the conductive rod 16, the nut 15 is installed in the small diameter part, and one side of the small diameter part, which is far away from the large diameter part, is provided with an inner blocking edge.

During testing, the convex and concave surface switching electrodes are installed on the three-post insulators, wherein the concave surface switching electrodes 6 are installed at two ends of the three-post insulator on the leftmost side, then appropriate supporting leg connecting blocks are selected according to the types of the three-post insulators, the three-post insulators are installed in the barrel units 4, the barrel units 4 are connected into a whole, the conductive connection of the conductive pull rods 7 is guaranteed to be reliable, and the barrel on the rightmost side is connected with a grounding wire.

The test fixture is integrally placed on a flat trolley, the test fixture is fixed by a nylon cushion block, the conducting rod 16 is screwed into the concave surface switching electrode 6 of the leftmost post insulator, the flat trolley is pushed, the conducting rod 16 is connected with the high-voltage end of the test device, and then power frequency withstand voltage tests can be carried out on the three post insulators and the local discharge amount of the three post insulators can be accurately measured.

Compared with the prior art, more than two post insulators are connected into a string for testing, the switching electrodes ensure that the post insulators are in conductive connection, and the testing efficiency is high. The tool barrel is flexible to disassemble and assemble, can be adjusted according to actual needs, and has strong adaptability; according to the landing leg inserts difference, design two kinds of landing leg connecting blocks, need not select frock barrel 3, only need select suitable landing leg connecting block, convenient assembling.

The second embodiment is different from the first embodiment in that: the switching electrode and the supporting cylinder insert can also adopt other forms of connecting structures; such as a set screw connection, or a hoop connection; in addition, the convex-concave structure can be arranged on the transfer electrode.

The third embodiment is different from the first embodiment in that: the length of the barrel unit may be increased so that two or more post insulators can be mounted to one barrel unit.

Claims

Assembling tool for GIL post insulator test, which is characterized in that: the testing device comprises a tool cylinder body for installing a post insulator to be tested, wherein the tool cylinder body is provided with a grounding structure and a supporting leg connecting structure which is used for fixing a supporting leg insert on the post insulator and is in conductive connection with the supporting leg insert; assembly fixture is still including being used for detaining respectively and establishing the switching electrode at support section of thick bamboo inserts axial both ends on the post insulator, be equipped with on the switching electrode with the electrically conductive connection structure of the switching electrode looks adaptation on the adjacent post insulator, assembly fixture is still including being used for installing support section of thick bamboo inserts in and the axial connection two the electrically conductive pull rod of switching electrode, electrically conductive pull rod forms radial space between the inner wall of back and support section of thick bamboo inserts in installing support section of thick bamboo inserts, the electrically conductive pull rod of the radial cross-over connection of switching electrode and support section of thick bamboo inserts.
2. The assembling tool for the GIL post insulator test of claim 1, wherein: two ends of the conductive pull rod respectively extend out of the corresponding switching electrodes, and one end of the conductive pull rod is provided with a jack for inserting the corresponding end of the conductive pull rod on the adjacent post insulator.
3. The assembling tool for the GIL post insulator test of claim 2, wherein: the assembly tool further comprises a high-voltage end used for connecting the test device and the conducting rod of the switching electrode, a stepped hole is formed in the periphery of the conducting rod on the switching electrode, and the stepped hole is provided with a small-diameter portion for nut installation and a large-diameter portion with the diameter matched with the outer diameter of the conducting rod.
4. The assembling tool for the GIL post insulator test of claim 3, wherein: the assembly tool further comprises a spring which is arranged in the jack on the conductive pull rod and used for connecting the conductive pull rods on the adjacent post insulators.
5. The assembling tool for the GIL post insulator test of claim 1, wherein: the switching electrode is provided with a groove used for buckling the axial end part of the support cylinder insert.
6. The assembling tool for the GIL post insulator test as set forth in claim 1, 2 or 5, wherein: the assembly tool further comprises a conducting rod used for connecting the high-voltage end of the test device with the switching electrode.
7. The assembling tool for the GIL post insulator test according to any one of claims 1 to 5, wherein: the tool cylinder is formed by more than two cylinder units which are arranged in parallel along the axial direction of the tool cylinder and are detachably connected.
8. The assembling tool for the GIL post insulator test according to any one of claims 1 to 5, wherein: the assembly fixture is characterized in that more than two positioning holes are formed in the fixture barrel body at intervals around the axis of the fixture barrel body, the assembly fixture further comprises a supporting leg connecting block used for being installed in the positioning holes, the supporting leg connecting block is provided with an inserting portion used for being inserted into the positioning holes and a flange which is arranged at the end portion of the inserting portion and used for being in stop fit with the outer wall of the fixture barrel body, the inserting portion is provided with a center hole for installing a connecting bolt, and the supporting leg connecting block and the connecting bolt form the supporting leg.
9. The assembling tool for the GIL post insulator test of claim 8, wherein: the leg connecting block also has an insertion end for insertion into a cavity of a corresponding leg insert on the post insulator.