Tool for verifying effect of filter

Abstract

The utility model relates to the technical field of auxiliary devices for GIS (Gas Insulated Switchgear) gas filtration, in particular to a tool for verifying the effect of a filter. The tool for verifying the effect of the filter comprises a tool flange, a self-sealing connector butt joint face is arranged on one side of the tool flange and used for being in butt joint with a self-sealing connector, and the size of the self-sealing connector butt joint face is matched with the size of the end face of the self-sealing connector in butt joint with the self-sealing connector butt joint face. The other side of the tool flange is provided with a GIS tank butt joint face used for being in butt joint with a GIS tank, and the GIS tank butt joint face is matched with the end face of the GIS tank in butt joint with the GIS tank butt joint face in size. The tool flange is provided with a filter assembly clamping groove, a filter material fixing assembly is arranged in the filter assembly clamping groove, and the filter material fixing assembly is used for fixing a tested filter material in the clamping groove. According to the tool for verifying the effect of the filter, the filter assembly is fixed between the GIS equipment and the self-sealing joint for verifying the filtering effect, so that unnecessary cost is saved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field for GIS gas filters auxiliary device, especially to a kind of tool for filter effect verification. BACKGROUND

[0002] GIS device includes bus, circuit breaker, isolating switch, grounding switch, voltage transformer, current transformer, arrester, cable terminal, incoming line bushing etc., GIS device inside is divided into several independent gas chamber, each gas chamber is filled with certain pressure SF6 gas as insulating medium.

[0003] SF6 gas is important insulating medium in GIS device, its purity and quality are crucial to the operation of equipment.When metal foreign matter enters gas chamber, it can cause uneven electric field distribution, and produce electric field distortion.This electric field distortion can cause local electric field intensity to be too high, thereby causing insulation breakdown. Insulation breakdown can cause internal short circuit of equipment, and can cause equipment explosion in serious case, causing great harm to personnel and equipment. Therefore, in the operation and maintenance of GIS device, the tightness of gas chamber should be strictly controlled to prevent foreign matter from entering.

[0004] In the operation and maintenance of GIS device, foreign matter is most likely to enter GIS device during the process of filling gas in GIS device, specifically, impurities, moisture, oil stains and other substances in external air can enter GIS interior through self-sealing joint during the process of filling gas in GIS device, causing damage to equipment. Therefore, it is necessary to consider installing filter device between GIS device tank and self-sealing joint to filter SF6 gas entering the interior of GIS device tank, so as to maintain a highly pure environment in the interior of GIS device to ensure its insulation performance and operation reliability.

[0005] In order to ensure good tightness between GIS device and self-sealing joint after installing filter device, the existing structure of GIS device or self-sealing joint may need to be changed to fix filter device on GIS device or self-sealing joint after installing filter device between GIS device and self-sealing joint. The existing GIS device has a wide range of applications, and directly changing the structure of GIS device or self-sealing joint to install filter device will cause unnecessary cost if the filtering effect is not good, so filtering effect verification is needed when installing filter device. The existing filter device cannot be directly installed between GIS device and self-sealing joint, so the filter device needs to be fixed between GIS device and self-sealing joint by means of tool. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of tool for filter effect verification to solve the problem that filter device cannot be directly installed between GIS device and self-sealing joint.

[0007] To solve the above problems, the utility model discloses a tool for filter effect verification adopts the following technical scheme:

[0008] A tool for filter effect verification includes tool flange, one side of tool flange is equipped with self-sealing joint butt joint surface to butt joint with self-sealing joint, and the size of the end face of the self-sealing joint butted with the self-sealing joint butt joint surface is adapted;The other side of tool flange is equipped with GIS tank body butt joint surface to butt joint with GIS tank body, and the size of the end face of the GIS tank body butted with the GIS tank body butt joint surface is adapted;Filter assembly clamping groove is equipped on tool flange, filter material fixing assembly is equipped in filter assembly clamping groove, and filter material fixing assembly is used to fix test filter material in clamping groove.

[0009] Further, the filter assembly clamping groove is a counterbore opened at the center of the self-sealing joint butt joint surface.

[0010] Further, the filter material fixing assembly includes cover body and compression ring;The cover body and compression ring cooperate to insulate and isolate test filter material from GIS body and self-sealing joint.

[0011] Further, the cover body is arranged on the step above the counterbore, and the compression ring is arranged on the side close to the self-sealing joint butt joint surface.

[0012] Further, the cover body includes sheath and bottom ring arranged at one end of sheath, test filter material is arranged in the sheath during use, and the sheath is positioned and matched with the counterbore through the outer peripheral surface.

[0013] Further, the bottom ring is located in the corresponding end of the sheath.

[0014] Further, the cover body is a polytetrafluoroethylene cover body.

[0015] Further, the compression ring is a polytetrafluoroethylene compression ring.

[0016] Further, the GIS tank body butt joint surface is provided with a sealing ring for sealing cooperation with the GIS tank body.

[0017] Beneficial effects: the tooling for filter effect verification of the utility model is an opening-up invention. Through the scheme, the tooling flange is fixed between the GIS equipment and the self-sealing joint, which provides an installation position for the filter material fixing assembly; the butt joint surfaces at the two ends of the tooling flange are respectively adapted to the butt joint surface sizes of the GIS equipment and the self-sealing joint, which ensures the good sealing property between the GIS equipment and the self-sealing joint after the filter material fixing assembly is added; the filter assembly clamping groove ensures that the filter material fixing assembly and the test filter material remain stable during the working process. The tooling for filter effect verification of the utility model fixes the filter material fixing assembly and the test filter material between the GIS equipment and the self-sealing joint for filtering effect verification, which saves unnecessary cost and improves the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of an embodiment of the tooling for filter effect verification of the utility model.

[0019] In the figure: 1, tooling flange; 2, self-sealing joint butt joint surface; 3, GIS tank body butt joint surface; 4, filter assembly clamping groove; 5, test filter material; 6, cover body; 7, pressing ring; 8, sheath; 9, bottom ring; 10, sealing ring; 11, sealing ring groove. DETAILED DESCRIPTION

[0020] The features and performances of the utility model are further described in detail in combination with the embodiments.

[0021] The tooling for filter effect verification of the utility model provides an installation position for the filter material fixing assembly and the test filter material by adding the tooling, and the sealing property at the butt joint is improved by setting the butt joint surface sizes of the GIS equipment and the self-sealing joint.

[0022] As a basic scheme, the tool for verifying the filtering effect of the filter comprises a tool flange 1, the filtering assembly is installed between the GIS tank body and the self-sealing joint through the tool flange 1, so that the SF6 gas entering the inside of the GIS device is filtered; the two ends of the tool flange 1 are respectively provided with a self-sealing joint abutting surface 2 and a GIS tank body abutting surface 3, in order to improve the sealing performance of the self-sealing joint abutting surface 2 and the GIS tank body abutting surface 3 at the two ends of the tool flange 1 and the end surfaces of the GIS tank body and the self-sealing joint, the material of the tool flange 1 can be selected to be the same as the abutting surfaces of the GIS tank body and the self-sealing joint; the end surface of the self-sealing joint abutting surface 2 and the self-sealing joint connected thereto is set to be the same size and shape, and similarly, the end surface of the GIS tank body abutting surface 3 and the GIS tank body connected thereto is also set to be the same size and shape, the same size and shape not only facilitate the installation and abutment and improve the work efficiency, but also improve the sealing performance of the connection to a certain extent. The filter material fixing assembly is installed on the tool flange 1, specifically, a filtering assembly clamping groove 4 is arranged on the tool flange 1, and the filter material fixing assembly is installed in the filtering assembly clamping groove at this position, so that the filter material fixing assembly is more stable during use and is not affected by the airflow, thereby avoiding the displacement of the filter material fixing assembly and the test filter material caused by the too strong airflow of the SF6 entering the inside of the GIS device, and further affecting the filtering effect and the verification result.

[0023] As a preferred embodiment, the filtering assembly clamping groove 4 is a counterbore opened at the center of the self-sealing joint abutting surface 2. The center of the self-sealing joint abutting surface 2 is the center through-hole position of the tool flange 1, and the counterbore is processed at this position, the size of the counterbore is adapted to the size of the filter material fixing assembly, and the counterbore constitutes the filtering assembly clamping groove 4. The filter material fixing assembly is arranged in the counterbore, and the filter material fixing assembly is better fixed between the self-sealing joint and the GIS tank body, and the sealing performance of the joint can be maintained. In other optional embodiments, the filtering assembly clamping groove 4 can also be arranged at the counterbore opened at the center of the GIS tank body abutting surface 3, but when verifying the filtering effect of the filtering device, different test filter materials 5 of different mesh numbers are used to place different sizes of foreign matters for blowing detection, so the filtering assembly needs to be replaced many times, and the tool flange 1 needs to be frequently disassembled and assembled. When the filtering assembly is installed at the end close to the GIS tank body, the connection of the GIS tank body tool flange 1 needs to be frequently disassembled and assembled, which is easy to cause foreign matters to enter the GIS tank body. Therefore, during the frequent disassembly and assembly of the tool flange 1, attention should be paid to avoid foreign matters from entering the GIS tank body. However, in general, whether the filtering assembly clamping groove 4 is arranged on the self-sealing joint abutting surface 2 or the GIS tank body abutting surface 3, it does not affect the fixing effect of the filter material fixing assembly on the filtering assembly clamping groove 4.

[0024] The key component of the whole verification tooling of the filter assembly, the filter assembly filters the gas filled into the GIS tank to remove impurities and particles therein, as a preferred embodiment, the filter assembly comprises a filter material fixing assembly and a test filter material 5, the filter material fixing assembly further comprises a cover body 6 and a compression ring 7, the test filter material 5 is arranged between the cover body 6 and the compression ring 7 when in use, the cover body 6 and the compression ring 7 cooperate to wrap and fix the two ends of the test filter material 5 between the cover body 6 and the compression ring 7 to form insulation isolation, and only the center is left for passing through the gas to realize the filtering effect.

[0025] As a preferred embodiment, the cover body 6 covers the test filter material 5 and the compression ring 7, which ensures that the test filter material 5 does not displace during use and guarantees the filtering effect. The opening direction of the cover body 6 is towards the side of the self-sealing joint butt joint surface 2, that is, the cover body 6 is arranged on the step above the counterbore, and the compression ring 7 is arranged near the side of the self-sealing joint butt joint surface 2, which facilitates the disassembly of the filter material fixing assembly or the test filter material 5 and the cleaning of foreign matter during the specific verification process. In other alternative embodiments, the positions of the cover body 6 and the compression ring 7 can be changed, the compression ring 7 is arranged on the step above the counterbore, and the opening direction of the cover body 6 is arranged towards the side of the GIS tank butt joint surface 3. When replacing the test filter material 5, the cover body 6 and the test filter material 5 need to be disassembled and cleaned of foreign matter. Since the protection range of the cover body 6 includes the compression ring 7, the whole filter assembly needs to be disassembled when disassembling the cover body 6 and the test filter material 5. After replacing the test filter material 5 or cleaning the foreign matter, the filter assembly is assembled and installed into the filter assembly clamping slot, which increases the process and reduces the work efficiency, but does not affect the protection effect of the filter material fixing assembly.

[0026] As a preferred embodiment, the cover body 6 is a key protection structure of the filter material fixing assembly, the cover body 6 comprises a sheath 8 and a bottom ring 9 arranged at one end of the sheath 8, and the sheath 8 and the bottom ring 9 jointly form a semi-closed space for installing and protecting the test filter material 5 and the compression ring 7. The test filter material 5 is arranged in the sheath 8 when in use, and the outer peripheral surface of the sheath 8 cooperates with the counterbore to ensure that the cover body 6 can be stably installed on the tooling flange 1. The bottom ring 9 is located at one end of the sheath 8 and serves to fix and support the sheath 8. Meanwhile, the bottom ring 9 can also serve as a connection interface of the test filter material 5 and other parts of the tooling. The design of the cover body 6 and the sheath 8 makes the test filter material 5 easy to install and disassemble, which facilitates the cleaning of foreign matter on the test filter material 5 and the replacement of the test filter material 5 during the verification of the filtering effect.

[0027] As a preferred embodiment, the bottom ring 9 is located within the corresponding end of the sheath 8. The bottom ring 9 is located within the corresponding end of the sheath 8, forming a stable base for supporting and fixing the sheath 8 and the internal test filter 5. The sheath 8 wraps around the outside of the bottom ring 9, test filter 5, and compression ring 7, serving to protect and support the test filter 5, while forming a seal with the bottom ring 9, sheath 8, and compression ring 7, ensuring that SF6 gas can only pass through the test filter 5 for filtration.

[0028] As a preferred embodiment, the cover 6 is a polytetrafluoroethylene cover 6, and the compression ring 7 is a polytetrafluoroethylene compression ring 7. The cover 6 serves as an external enclosure for the test filter 5, providing a stable working environment for the test filter 5. The compression ring 7 is located at the open end of the cover 6, securing the test filter 5 within the cover 6 through a tightening action, and forming a sealed structure with the cover 6. The cover 6 is made of polytetrafluoroethylene material, taking advantage of the corrosion resistance and insulation of polytetrafluoroethylene to ensure that the cover 6 remains stable and sealed in harsh environments. The material of the compression ring 7 is the same as that of the cover 6, ensuring compatibility and sealing between the two. The close fit of the cover 6 and the compression ring 7 ensures the stability and reliability of the test filter 5 during verification, preventing verification errors caused by movement or deformation. The design of the compression ring 7 also takes into account the need for easy disassembly and cleaning, facilitating maintenance and use. The insulation properties of polytetrafluoroethylene allow the cover 6 to isolate the test filter 5 from external electrical signal interference, improving the accuracy of the verification. In other alternative embodiments, the materials of the cover 6 and the compression ring 7 can be selected from fluorinated polymers, which have similar corrosion resistance and high temperature resistance to polytetrafluoroethylene, and may be less expensive; however, the mechanical strength and sealing performance of fluorinated polymer covers or compression rings are not as good as those of polytetrafluoroethylene covers or compression rings. In other alternative embodiments, the materials of the cover 6 and the compression ring 7 can also be selected from fluorinated ethylene-propylene copolymers, which have the same properties as fluorinated polymers, and the mechanical strength and sealing performance of fluorinated ethylene-propylene copolymers are also not as good as those of polytetrafluoroethylene. The poor mechanical strength and sealing performance may have some impact on the accuracy of the filtration effect verification, but the cover or compression ring made of fluorinated polymer or fluorinated ethylene-propylene copolymer can still serve as an insulating barrier for the test filter.

[0029] As a preferred embodiment, the GIS tank abutting surface 3 is provided with a sealing ring 10 for sealing cooperation with the GIS tank. The tool flange 1 is made of the same material as the self-sealing joint to improve the sealing of the connection between the tool flange 1 and the self-sealing joint. To further improve the sealing of the connection between the tool flange 1 and the GIS tank, a sealing ring 10 is provided on the GIS tank abutting surface 3 of the tool flange 1 to improve the sealing of the connection between the tool flange 1 and the GIS tank. The GIS tank abutting surface 3 is provided with a sealing ring groove 11, and the sealing ring 10 is installed in the sealing ring groove 11 on the GIS tank abutting surface 3 to form an effective sealing structure, improve the sealing degree of the tool flange 1 and the GIS tank, and ensure the sealing during the verification process, thereby improving the accuracy of the verification of the filtering effect. The installation and removal of the sealing ring 10 is relatively simple, which is convenient for users to maintain and replace, and reduces the maintenance cost.

[0030] The specific implementation process of the embodiment is: first, different mesh number of test filter materials 5 are installed into the filter material fixing assembly of the embodiment in multiple times, and then different size foreign matters are used for blowing detection to verify the filtering effect of the test filter material 5. As shown in Figure 1 The tool flange 1 is installed on the GIS tank and the self-sealing joint, and the tool flange 1 and the filter material fixing assembly are installed between the GIS tank and the self-sealing joint. During connection, the sealing between the tool flange 1 and the GIS tank and the self-sealing joint is ensured to avoid affecting the accuracy of the verification effect, and then the gas treatment efficiency verification of the test filter material 5 with different mesh numbers is performed.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application. The patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A tooling for verifying the effectiveness of a filter, characterized in that, The device includes a tooling flange, one side of which has a self-sealing connector mating surface for mating with a self-sealing connector, the mating surface of which is adapted to the dimensions of the end face of the self-sealing connector it is mating with; the other side of the tooling flange has a GIS tank mating surface for mating with a GIS tank, the mating surface of which is adapted to the dimensions of the end face of the GIS tank it is mating with; the tooling flange has a filter assembly slot, and a filter media fixing assembly is provided in the filter assembly slot for fixing the test filter media into the slot.

2. The fixture for verifying filter effectiveness according to claim 1, characterized in that, The filter component slot is a countersunk hole at the center of the self-sealing connector mating surface.

3. The fixture for verifying filter effectiveness according to claim 2, characterized in that, The filter media fixing assembly includes a cover and a pressure ring, which cooperate to insulate and isolate the filter media under test from the GIS body and the self-sealing connector.

4. The fixture for verifying filter effectiveness according to claim 3, characterized in that, The cover is located on the step above the countersunk hole, and the pressure ring is located on the side close to the mating surface of the self-sealing joint.

5. The fixture for verifying filter effectiveness according to claim 4, characterized in that, The cover includes a sleeve and a bottom ring at one end of the sleeve. The test filter material is arranged in the sleeve during use, and the sleeve is positioned and fitted with the countersunk hole through its outer peripheral surface.

6. The fixture for verifying filter effectiveness according to claim 5, characterized in that, The bottom ring is located within the corresponding end of the sheath.

7. The fixture for verifying filter effectiveness according to claim 3, characterized in that, The cover is a polytetrafluoroethylene cover.

8. The fixture for verifying filter effectiveness according to claim 3, characterized in that, The compression ring is a polytetrafluoroethylene compression ring.

9. The fixture for verifying filter effectiveness according to claim 1, characterized in that, The GIS tank body has a sealing ring on its mating surface for sealing with the GIS tank body.

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