A tool for testing the withstand voltage of silicone rubber insulating sleeves

Abstract

The present invention discloses a tool for testing the withstand voltage of a silicone rubber insulating sleeve, comprising: an induction box, wherein a plurality of first inner cone sleeves are provided in the box body of the induction box, and a conductive aluminum bar and a grading ring are provided at the connection between the first inner cone sleeves and the first mounting plate; an adapter mounting sleeve is provided in the box body of the induction box; an air box, wherein a second mounting plate is provided at the connection between the air box and the inner cone sleeve of the induction box, wherein a plurality of second inner cone sleeves are provided in the box body of the air box, and one side of the second inner cone sleeve is connected to the second mounting plate; corresponding silicone rubber insulating sleeves are connected to the second mounting plate through the second inner cone sleeves, and connectors are provided at both ends of the silicone rubber insulating sleeves; a guide device is provided between the air box and the induction box, the guide device comprising a guide rod, which passes through a guide block provided on the outer periphery of the air box for guiding movement; and a cylinder and a drive shaft are provided between the air box and the induction box. The present invention improves detection efficiency and ensures product quality and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear manufacturing, and in particular to a tool for testing the withstand voltage of a silicone rubber insulating bushing. Background Art

[0002] As power grid reliability improves, quality requirements for key switchgear components are becoming increasingly stringent. Silicone rubber insulating bushings, as key components of gas-insulated metal-enclosed switchgear, are subject to 100% factory inspection before assembly.

[0003] The existing testing method can only clamp one piece per test, which is inefficient. To improve the testing efficiency, a test fixture can be designed to clamp multiple silicone rubber insulating sleeves at a time, thereby improving the efficiency of the withstand voltage test.

[0004] Furthermore, since testing a single bushing consumes the same amount of energy as testing multiple bushings, the tooling can also reduce the energy consumed during the withstand voltage test for each bushing. The withstand voltage test for silicone rubber bushings requires a voltage of 95kV, thus also utilizing existing gas-insulated metal-enclosed switchgear technology. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the object of the present invention is to provide a tool for voltage withstand testing of silicone rubber insulating sleeves.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted is:

[0007] A silicone rubber insulating sleeve withstand voltage test tool, comprising:

[0008] An electrical box, wherein a plurality of first inner cone sleeves are provided in the box body of the electrical box, one side of the first inner cone sleeves is connected to the first mounting plate, and a conductive aluminum bar and a grading ring are provided at the connection between the first inner cone sleeves of the first mounting plate;

[0009] An adapter mounting sleeve is provided in the box body of the power box, one side of the adapter mounting sleeve is connected to the adapter sealing plate, and the power adapter is connected through the adapter sealing plate;

[0010] The induction box is provided with a first self-sealing valve and a second self-sealing valve;

[0011] An air box, wherein a second mounting plate is provided at a connection point between the air box and the inner cone sleeve of the lead-in box, a plurality of second inner cone sleeves are provided in the air box body, and one side of the second inner cone sleeves is connected to the second mounting plate;

[0012] A corresponding silicone rubber insulating sleeve is connected to the second mounting plate through the second inner cone sleeve, and connectors are provided at both ends of the silicone rubber insulating sleeve;

[0013] A limit block is provided on the second mounting plate;

[0014] The air box is provided with a third self-sealing valve and a fourth self-sealing valve;

[0015] A guide device is provided between the air box and the induction box, and the guide device includes a plurality of guide rods, and the guide rods pass through guide blocks provided on the outer periphery of the air box to perform guiding movement;

[0016] An air cylinder and a drive shaft are provided between the air box and the induction box.

[0017] In a preferred embodiment of the present invention, the equalizing rings are arranged in a number corresponding to the number of the first inner cone sleeves.

[0018] In a preferred embodiment of the present invention, the conductive aluminum bars are arranged on several different voltage grading rings.

[0019] In a preferred embodiment of the present invention, the guide blocks are installed on both sides of the air box through pin holes.

[0020] In a preferred embodiment of the present invention, the cylinder is arranged on both sides of the induction box through a cylinder mounting structure.

[0021] In a preferred embodiment of the present invention, the cylinder mounting structure includes a cylinder mounting block mounted in contact with the cylinder and a cylinder mounting plate provided on a side of the induction box.

[0022] In a preferred embodiment of the present invention, the ends of the drive shaft are arranged on both sides of the air box through fixing blocks.

[0023] In a preferred embodiment of the present invention, a plurality of casters are provided at the lower end of the gas box or the induction box.

[0024] In a preferred embodiment of the present invention, the guide devices are first to fourth guide devices arranged in pairs at both sides between the air box and the induction box.

[0025] The beneficial effects of the present invention are:

[0026] The method of clamping multiple insulating sleeves at a time improves the detection efficiency and ensures product quality and benefits. The pneumatic clamping method ensures the compression of the insulating sleeve and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2It is a structural schematic diagram of the induction box of the present invention.

[0029] Figure 3 It is a structural schematic diagram of the air box of the present invention.

[0030] Figure 4 It is a schematic diagram of the local structure of the present invention Figure 1 .

[0031] Figure 5 It is a schematic diagram of the local structure of the present invention Figure 2 . DETAILED DESCRIPTION

[0032] To make the objects, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are merely intended to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, in the following structure, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion about the concepts of the present invention.

[0033] In describing the present invention, it should be noted that terms such as "upper," "lower," "inner," "outer," and "top / bottom" are used to indicate positions or relationships based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations of the present invention. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] like Figure 1-5 The illustrated tooling for testing the withstand voltage of silicone rubber insulating sleeves includes a lead box 100. Several first inner-conical sleeves 110 are installed within the lead box 100. One side of the first inner-conical sleeves 110 is connected to a first mounting plate 101. A conductive aluminum busbar 120 and a grading ring 130 are installed at the connection between the first inner-conical sleeves 110 and the first mounting plate 101. The lead box 100 is welded from stainless steel plates and its sealing performance is tested using a vacuum helium leak test.

[0035] Furthermore, the number of the equalizing rings 130 is corresponding to the number of the first inner cone sleeves 110 . The conductive aluminum bars 120 are arranged on different equalizing rings 130 .

[0036] The conductive aluminum busbar 120 is used for conducting electricity, and the voltage grading ring 130 is used to prevent local discharge at the connection.

[0037] An adapter mounting sleeve 140 is provided in the box body of the power box 100 . One side of the adapter mounting sleeve 140 is connected to the adapter sealing plate 102 , and is connected to the power adapter 200 through the adapter sealing plate 102 .

[0038] A first self-sealing valve 151 and a second self-sealing valve 152 are provided on the induction box 100. The two self-sealing valves are installed in the mounting holes reserved in the box body of the induction box 100. The first self-sealing valve 151 is used to charge and discharge SF6 gas, and the second self-sealing valve 152 is equipped with a pressure gauge (not shown in the figure), which can realize real-time monitoring during the charging and discharging process.

[0039] A sealing plate 103 is provided at the upper end of the induction box 100 . The sealing plate 103 is mounted on the housing with bolts and is detachable, which facilitates maintenance of the interior of the induction box 100 .

[0040] A second mounting plate 301 is installed at the connection between the inner conical sleeve of the gas box 300 and the induction box 100. Several second inner conical sleeves 310 are installed within the gas box 300, one side of which is connected to the second mounting plate 301. The gas box 300 is welded from stainless steel plates and its sealing performance is tested using a vacuum helium leak test.

[0041] The second mounting plate 301 is connected to a corresponding silicone rubber insulating sleeve 400 via a second inner cone sleeve 310 , and connectors 410 are provided at both ends of the silicone rubber insulating sleeve 400 .

[0042] A sealing plate 302 is provided at the upper end of the air box 300 . The sealing plate 302 is mounted on the shell with bolts and is detachable, which facilitates maintenance of the interior of the air box 300 .

[0043] A limit block 320 is provided on the second mounting plate 301 . The limit block 320 is made of a cold-rolled steel plate and is used to control the compression amount of the silicone rubber insulating sleeve 400 .

[0044] The gas box 300 is provided with a third self-sealing valve 330 and a fourth self-sealing valve 340. The two self-sealing valves are installed in the mounting holes reserved in the box body of the gas box 300. The third self-sealing valve 330 is used to charge and discharge SF6 gas, and the fourth self-sealing valve 340 is equipped with a pressure gauge (not shown in the figure), which can realize real-time monitoring during the charging and discharging process.

[0045] A guide mechanism 500 is installed between the air box 300 and the fuse box 100. The guide mechanism 500 includes several guide rods 510, which pass through guide blocks 520 located on the outer periphery of the air box 300 for guiding movement. The guide blocks 520 are mounted on either side of the air box 300 through pin holes 530. After being compressed into place, positioning pins can be inserted inside to limit the position.

[0046] The guide devices 500 are the first to fourth guide devices arranged in pairs on both sides between the air box 300 and the induction box 100. There are four sets symmetrically distributed on both sides to ensure uniform distribution of the guide force.

[0047] A cylinder 600 and a drive shaft 610 are provided between the gas box 300 and the induction box 100. The cylinder 600 is provided on both sides of the induction box 100 through a cylinder mounting structure.

[0048] The cylinder mounting structure includes a cylinder mounting block 620 mounted in contact with the cylinder 600 and a cylinder mounting plate 630 provided on a side of the induction box 100 .

[0049] The ends of the driving shaft 610 are disposed on both sides of the air box 300 through fixing blocks 640 .

[0050] A plurality of casters 700 are provided at the lower end of the gas box 300 or the induction box 100. The casters 700 can realize the movement of the test tooling and have a brake device, so that they can be fixed at any position for use.

[0051] Because of the above structure, the working principle of the present invention is:

[0052] Fill the induction box and gas box with SF6 gas. After assembly, install a pressure gauge on one self-sealing valve and connect the other self-sealing valve to the SF6 gas cylinder for charging. Observe the charging pressure carefully and stop when it reaches the appropriate range.

[0053] After positioning the tooling, secure the caster brake with the cylinder in the open position. Once secure, apply conductive silicone grease to the silicone rubber insulation sleeve, insert it into the copper connector, and then place it into the conical sleeve inside the air box. Securely install.

[0054] After installing all silicone rubber insulating sleeves and connectors, select appropriate limit blocks and assemble them on the contact surface between the induction box and the gas box. Then start the cylinder to compress the silicone rubber insulating sleeve until both sides of the gas box are close to the limit blocks, and use the positioning pin to pass through the pin hole to position it.

[0055] After compression, conduct electricity from the adapter side to complete the test. After the test is completed, pull out the positioning pin and start the cylinder to separate the lead box and the air box. After separation, remove the silicone rubber insulation sleeve and connector together, then take out the silicone rubber insulation sleeve alone and inspect the surface for signs of breakdown.

[0056] Use the recovery device to drain the SF6 gas in the induction box and gas box, then remove the sealing plate at the position that needs maintenance, and inspect and maintain the inside of the gas box.

[0057] The present invention is used for the withstand voltage test of silicone rubber insulating sleeves and has great advantages over the previous technologies:

[0058] 1. The method of clamping multiple insulating sleeves at one time improves the detection efficiency and ensures product quality and benefits;

[0059] 2. The use of SF6 insulation technology has achieved miniaturization of the gas box, greatly reducing the volume and weight of the tooling.

[0060] 3. The pneumatic clamping method is adopted to ensure the compression of the insulating sleeve and improve the detection efficiency;

[0061] 4. It has a detachable limit block, which can adjust the compression of the casing with different thicknesses;

[0062] 5. Through the caster brake, it can be arranged on the site as needed;

[0063] 6. Aluminum busbar is used to conduct voltage and grading ring is used to prevent partial discharge, which reduces tooling costs.

[0064] 7. It has a locking device that can lock the position after the compression sleeve is in place.

[0065] 8. It has a guide device that can accurately locate the position of the insulating sleeve during movement.

[0066] 9. The air box has a removable cover to facilitate the installation and replacement of internal parts.

[0067] 10. Each gas box has two self-sealing valves, which can monitor the air pressure in the box throughout the filling and deflation process.

[0068] 11. The adapter is used to draw power, which is convenient and flexible, and reduces site requirements and costs.

[0069] The basic principles and main features of the invention and the advantages of the invention are shown and described above.

[0070] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tool for testing the withstand voltage of a silicone rubber insulating sleeve, characterized in that: include: An electrical box, wherein a plurality of first inner cone sleeves are provided in the box body of the electrical box, one side of the first inner cone sleeves is connected to the first mounting plate, and a conductive aluminum bar and a grading ring are provided at the connection between the first inner cone sleeves of the first mounting plate; An adapter mounting sleeve is provided in the box body of the power box, one side of the adapter mounting sleeve is connected to the adapter sealing plate, and the power adapter is connected through the adapter sealing plate; The induction box is provided with a first self-sealing valve and a second self-sealing valve; An air box, wherein a second mounting plate is provided at a connection point between the air box and the inner cone sleeve of the lead-in box, a plurality of second inner cone sleeves are provided in the air box body, and one side of the second inner cone sleeves is connected to the second mounting plate; A corresponding silicone rubber insulating sleeve is connected to the second mounting plate through the second inner cone sleeve, and connectors are provided at both ends of the silicone rubber insulating sleeve; A limit block is provided on the second mounting plate; The air box is provided with a third self-sealing valve and a fourth self-sealing valve; A guide device is provided between the air box and the induction box, and the guide device includes a plurality of guide rods, and the guide rods pass through guide blocks provided on the outer periphery of the air box to perform guiding movement; A cylinder and a drive shaft are provided between the air box and the induction box; The ends of the drive shaft are arranged on both sides of the air box through fixing blocks; The number of the pressure equalizing rings corresponds to the number of the first inner cone sleeves; The conductive aluminum bars are arranged on a number of different voltage-equalizing rings; The guide blocks are mounted on both sides of the air box through pin holes; The cylinder is arranged on both sides of the induction box through a cylinder mounting structure.

2. A silicone rubber insulating sleeve withstand voltage test tool as claimed in claim 1, characterized in that: The cylinder mounting structure includes a cylinder mounting block mounted in contact with the cylinder and a cylinder mounting plate arranged on a side of the induction box.

3. A tool for testing the withstand voltage of a silicone rubber insulating sleeve as claimed in claim 1, characterized in that: The lower end of the gas box or the induction box is provided with a plurality of casters.

4. A silicone rubber insulating sleeve withstand voltage test tool as claimed in claim 1, characterized in that: The guide devices are first to fourth guide devices arranged in pairs at both sides between the air box and the induction box.

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