GIL three-column insulator system anti-bending tool

Abstract

The utility model belongs to the field of insulator test, disclose GIL three support insulator system is with bending resistance tooling, including, disc -shaped adapter plate, its end surface fixed one positioning support and two adjustable supports, and positioning support and two adjustable supports are in the disc -shaped adapter plate and correspond with three support insulator triangular distribution, the utility model discloses positioning support and two adjustable supports are triangularly installed on the disc -shaped adapter plate, and match with the three legs of three support insulator, in order to install three support insulator, then conductor is inserted into the high -voltage conductor through -hole in three support insulator, and the conductor that stretches out high -voltage conductor through -hole outside is pressed vertically downward to pressure machine, to test the bending resistance of three support insulator, in order to satisfy the demand of factory test detection, compared with prior art, replace the mode of driving pull support leg, reduce test cost, shorten test time, provide test efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of insulator testing, specifically relating to bending resistance fixtures for GIL three-post insulator systems. Background Technology

[0002] The GIL three-post insulator system is a key component in gas-insulated metal-enclosed transmission lines (GIL). It has a convex shape, comprising the conductor-covered area and three posts. In practical applications, it is subject to various factors such as conductor / shell thermal expansion and contraction, ground settlement, and assembly errors, resulting in various horizontal stresses. Under these operating conditions, the posts are susceptible to large bending moment loads. Furthermore, under complex stress conditions during transportation, installation, and operation, internal air gap defects may form, eventually leading to insulation failure and insulator explosion accidents with long-term operation, causing personal injury and property damage. Therefore, bending resistance testing is necessary to ensure sufficient mechanical strength to withstand these stresses and guarantee the safe operation of the equipment.

[0003] However, due to the unique structure of this three-post insulator, where each pair of adjacent legs is positioned at a 120° angle, stable installation and positioning are required before conducting bending tests. Currently, the bending test fixtures mainly used are as follows: Figure 1 As shown, a fixing ring (not shown in the figure) located in the central insert of the three-post insulator is used to ensure that the position of the three-post insulator is relatively fixed and will not wobble; and a fixing bolt is fixedly connected between the drive and the end of the three-post insulator to be tested. After connection, the direction of the three-post insulator to be tested should be consistent with the direction of the drive tension F; the other two legs of the three-post insulator to be tested can be fixed or not fixed according to actual needs.

[0004] However, the above bending test only applies tension to one or more outriggers after the fixture is fixed. If tension is applied to each outrigger separately, only one drive is needed. After one outrigger is tested, the fixing bolt between the drive and the outrigger is removed, and then the fixing bolt is installed between the drive and the outrigger under test. This operation is very cumbersome. In addition, when two or three outriggers need to be tested at the same time, multiple drives are required, which increases the testing cost. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a bending resistance fixture for GIL three-post insulator systems, designed to test the bending resistance performance of GIL three-post insulators.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A bending resistance fixture for a GIL three-post insulator system, comprising,

[0008] A disc-shaped adapter plate has a positioning bracket and two adjustable brackets fixed on its end face; the positioning bracket and the two adjustable brackets are distributed in a triangle on the disc-shaped adapter plate and correspond to the three-post insulator, and the three legs of the three-post insulator are respectively installed in the positioning bracket and the two adjustable brackets;

[0009] A conductor is inserted into the three-post insulator and pressure is applied to it by a pressure device.

[0010] Preferably, the positioning bracket includes,

[0011] A square fixing plate is fixedly mounted on the disc-shaped adapter plate by bolts;

[0012] The first upright plate is fixedly mounted on the top of the square fixed plate and extends axially along the disc-shaped transition plate. One of the legs of the three-post insulator is fixedly mounted on the first upright plate by bolts.

[0013] Preferably, each of the adjustable supports includes,

[0014] A sliding plate, which is mounted on the disc-shaped adapter plate via an adjustable structure;

[0015] The second vertical plate is fixedly installed on the top of the sliding plate and extends along the axial direction of the disc-shaped transition plate;

[0016] The other two legs of the three-post insulator are respectively fixedly mounted on the second upright plate of the two adjustable brackets by bolts.

[0017] Preferably, the adjustable structure includes,

[0018] The oblong hole formed on the sliding plate has its center line extending in a direction that corresponds to the extension direction of the leg in the three-post insulator.

[0019] The locking bolt is fitted with a sliding plate through a slotted hole and threaded onto the disc-shaped adapter plate.

[0020] Preferably, the three-post insulator has a high-voltage conductor through hole at its center, and the conductor is inserted into the high-voltage conductor through hole.

[0021] Preferably, the pressure device is a press, which applies vertical downward pressure to the conductor extending from the three-post insulator.

[0022] Preferably, the disc-shaped adapter plate is fixedly connected to a back plate, the back plate extends vertically, and the back plate is mounted on the base plate of the press.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. Because the positioning bracket and two adjustable brackets in this utility model are triangularly mounted on the disc-shaped adapter plate and match the three legs of the three-post insulator, the three-post insulator is installed. Then, the conductor is inserted into the high-voltage conductor through hole inside the three-post insulator, and the conductor extending out of the high-voltage conductor through hole is subjected to vertical downward pressure by a press to perform a bending test, that is, to test the bending performance of the three-post insulator to meet the factory test requirements. Compared with the prior art, this method replaces the method of using a drive to pull the legs, so there is no need to replace the drive or add multiple drives to perform the above test method, reducing test costs, shortening test time, and improving test efficiency.

[0025] 2. Because the positioning bracket and two adjustable brackets in this utility model are installed in a triangular shape on the disc-shaped adapter plate and match the three legs of the three-post insulator, the adjustment capability of the two adjustable brackets allows the bending fixture to adapt to the installation of the legs of different lengths and thicknesses, so that the bending fixture can meet the testing requirements of three-post insulators of different sizes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an anti-bending tooling in the prior art;

[0027] Figure 2 This is a three-dimensional structural diagram of the bending-resistant tooling in this utility model;

[0028] Figure 3 This is a front view of the bending-resistant fixture in this utility model;

[0029] Figure 4 This is a side view of the bending-resistant fixture in this utility model;

[0030] Figure 5 This is a schematic diagram of the anti-bending fixture of this utility model installed on a press;

[0031] In the diagram: 1. Three-post insulator; 11. High-voltage conductor through hole; 2. Disc-shaped adapter plate; 21. Disc-shaped adapter plate mounting screw hole; 3. Positioning bracket; 31. Square fixing plate; 32. First upright plate; 4. Adjustable bracket; 41. Sliding plate; 411. Waist-shaped hole; 412. Locking bolt; 42. Second upright plate; 5. Conductor; 6. Press; 61. Force application part; 611. Arc surface of force application part; 7. Back plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments are described in detail with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0033] like Figure 2-5 As shown, a bending resistance fixture for a GIL three-post insulator system includes,

[0034] A disc-shaped adapter plate 2 has a positioning bracket 3 fixed to its end face. The positioning bracket 3 includes a square fixing plate 31, which is fixedly installed on the disc-shaped adapter plate 2 by bolts. A first upright plate 32 is fixedly installed on the top of the square fixing plate 31 and extends along the axial direction of the disc-shaped adapter plate 2. One of the legs of the three-post insulator 1 is fixedly installed on the first upright plate 32 by bolts.

[0035] And two adjustable brackets 4, wherein each adjustable bracket 4 includes a sliding plate 41, which is mounted on a disc-shaped adapter plate 2 through an adjustable structure. The adjustable structure includes an oblong hole 411 formed on the sliding plate 41, and the extension direction of its center line corresponds to the extension direction of the support leg in the three-post insulator 1. A locking bolt 412 is fitted onto the sliding plate 41 through the oblong hole 411 and threaded onto the disc-shaped adapter plate 1. Specifically, the disc-shaped adapter plate 2 also has a locking bolt threaded hole. The locking bolt first passes through the oblong hole and then is screwed into the locking bolt. In the threaded hole, then adjust the distance between the adjustable bracket and the positioning bracket until it is adjusted to the predetermined position; the second upright plate 42 is fixedly installed on the top of the sliding plate 41 and extends along the axial direction of the disc-shaped transition plate 2; the other two legs of the three-post insulator 1 are respectively fixedly installed on the second upright plate 42 on the two adjustable brackets 4 by bolts; and the positioning bracket 3 and the two adjustable brackets 4 are triangularly distributed on the disc-shaped transition plate 2 and correspond to the three-post insulator 1, and the three legs of the three-post insulator 1 are respectively installed in the positioning bracket 3 and the two adjustable brackets 4;

[0036] Conductor 5 is inserted into the three-post insulator and pressure is applied to it by a pressure device; specifically, the three-post insulator 1 has a high-voltage conductor through-hole 11 at its center, conductor 5 is inserted into the high-voltage conductor through-hole 11, and the pressure device is a press 6, which applies vertically downward pressure to conductor 5 extending out of the three-post insulator 1; specifically, the press 6 has a vertically downward force-applying part 61, which applies vertically downward pressure to conductor 5, such as... Figure 4The pressure (F) in the conductor 5 is such that the lower surface of the force-applying part 61 is set as a force-applying part arc surface 611 that matches the outer surface of the conductor 5. The purpose is to increase the force-applying area of ​​the conductor 5 and avoid excessive pressure from damaging the conductor 5.

[0037] The disc-shaped adapter plate 1 is fixedly connected to a back plate 7, which extends vertically and is mounted on the base plate of the press 6. The purpose is to improve the test stability of the disc-shaped adapter plate 1 by connecting it to the base plate of the press 6 via the back plate 7, thereby providing a stable environment for the bending test.

[0038] This utility model is operated in the following manner:

[0039] First, the back plate 7 is fixed to the base plate of the tensile testing machine 6 with bolts, so that the back plate 7 is set in the vertical direction;

[0040] Secondly, the positioning bracket 3 and the two adjustable brackets 4 are both fixed to the disc-shaped adapter plate 1 with bolts, and the positioning bracket 3 and the adjustable brackets 4 both extend along the axial direction of the disc-shaped adapter plate 2. Specifically, the first upright plate 32 and the second upright plate 42 extend along the axial direction of the disc-shaped adapter plate 2. In addition, the positioning bracket 3 is used as the positioning reference. The locking bolt 412 on each adjustable bracket first passes through the oblong hole 411, and then the locking bolt 412 is screwed into the locking bolt thread hole. Then the distance between the adjustable bracket 4 and the positioning bracket 3 is adjusted until it is adjusted to the predetermined position. The oblong hole 411 provides adjustment margin for the distance between the two adjustable brackets 4 and the positioning bracket 3.

[0041] Next, the three legs of the three-post insulator 1 are fixed to the positioning bracket 3 and the two adjustable brackets 4 respectively by bolts. Specifically, the three legs are installed on the first upright plate 32 and the two second upright plates 42 respectively.

[0042] Additionally, it should be noted that each upright plate is equipped with a circular fixing plate, and each of the legs is bolted to the circular fixing plate so that the three legs are respectively fixed on the positioning bracket 3 and the two adjustable brackets 4.

[0043] Then adjust the two adjustable brackets 4 separately to fine-tune their positions and stabilize the entire fixture;

[0044] Finally, the entire crane is hoisted (the disc-shaped adapter plate 2 is equipped with hoisting holes). The assembled whole is screwed into the mounting screw holes of the disc-shaped adapter plate with bolts, so that the disc-shaped adapter plate 2 is installed on the back plate 7. The conductor 5 is inserted into the high-voltage conductor through hole of the three-post insulator 1, the lever arm is measured, and then pressure is applied vertically downward through the press 6 until the required value is reached.

[0045] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A bending resistance fixture for a GIL three-post insulator system, characterized in that, include, A disc-shaped adapter plate has a positioning bracket and two adjustable brackets fixed on its end face; the positioning bracket and the two adjustable brackets are distributed in a triangle on the disc-shaped adapter plate and correspond to the three-post insulator, and the three legs of the three-post insulator are respectively installed in the positioning bracket and the two adjustable brackets; A conductor is inserted into the three-post insulator and pressure is applied to it by a pressure device.

2. The bending resistance fixture according to claim 1, characterized in that: The positioning bracket includes, A square fixing plate is fixedly mounted on the disc-shaped adapter plate by bolts; The first upright plate is fixedly mounted on the top of the square fixed plate and extends axially along the disc-shaped transition plate. One of the legs of the three-post insulator is fixedly mounted on the first upright plate by bolts.

3. The bending resistance fixture according to claim 1, characterized in that: Each of the adjustable supports includes, A sliding plate, which is mounted on the disc-shaped adapter plate via an adjustable structure; The second vertical plate is fixedly installed on the top of the sliding plate and extends along the axial direction of the disc-shaped transition plate; The other two legs of the three-post insulator are respectively fixedly mounted on the second upright plate of the two adjustable brackets by bolts.

4. The bending resistance fixture according to claim 3, characterized in that: The adjustable structure includes, The oblong hole formed on the sliding plate has its center line extending in a direction that corresponds to the extension direction of the leg in the three-post insulator. The locking bolt is fitted with a sliding plate through a slotted hole and threaded onto the disc-shaped adapter plate.

5. The bending resistance fixture according to claim 1 or 4, characterized in that: The three-post insulator has a high-voltage conductor through-hole at its center, and the conductor is inserted into the high-voltage conductor through-hole.

6. The bending resistance fixture according to claim 5, characterized in that: The pressure device is a press, which applies vertical downward pressure to the conductor extending from the three-post insulator.

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