Gauge calibration valve with filtering device for GIS (Gas Insulated Switchgear)
By installing a filter device at the tank connection port of the calibration valve, the problems of density meter errors and impurities entering the GIS equipment were solved, thus ensuring the accuracy of gas pressure monitoring and protecting equipment performance.
Patent Information
- Application Number
- CN202423252953.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The density meters of existing GIS equipment may develop errors during long-term use, leading to inaccurate gas pressure monitoring. Furthermore, impurities in the gas introduced may cause corrosion and discharge risks to the equipment, affecting its performance and lifespan.
A filter device, including a mounting base and a filter element, is installed at the tank connection port of the calibration valve to filter impurities in the gas and ensure gas quality.
It improves the accuracy of gas pressure monitoring, prevents impurities from entering GIS equipment, reduces the risk of corrosion and discharge, and extends equipment life.
Smart Images
Figure CN223595126U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of gas insulated metal enclosed switchgear in electric switch, specifically relates to a table valve with filter device for GIS. BACKGROUND
[0002] GIS (Gas Insulated Switchgear, gas insulated metal enclosed switchgear) is widely used in substation because of its reliable operation, small external environment influence, space saving, no need for regular maintenance and other advantages. GIS device includes bus, circuit breaker, disconnecting switch, grounding switch, mutual inductor and other elements, which are combined in a tank through reasonable and ingenious structure design, then the tank is filled with sulfur hexafluoride gas with excellent insulation and arc extinguishing performance as insulation medium through aeration device, in addition, self-sealing joint connected with aeration device is arranged on the tank to ensure the sealing of GIS tank after disconnecting aeration device, so as to avoid gas leakage in the instant of disconnection.
[0003] SF6 gas pressure in GIS tank is an important basis for judging the operation condition of the device, in normal work, density table is usually used to monitor gas pressure, so that abnormal conditions such as gas leakage can be found and handled in time to ensure the normal operation of GIS device, but the error of density table may gradually appear in the long-term use process, which will lead to inaccurate monitoring of gas pressure in the tank and affect the normal operation of the device, so a device is needed to check the density table in real time to ensure that the density table can correctly monitor the gas pressure in the tank.
[0004] In the prior art, three-way table valve without disassembly is often used to check the density table, three interfaces of the table valve are connected with GIS tank body, density table for monitoring gas pressure and self-sealing joint for ensuring aeration sealing, the three devices are connected through the gas flow channel arranged in the table valve, which can not only realize aeration of the tank, but also ensure the accuracy of gas pressure monitoring in the tank, but the gas filled in the GIS tank may carry some impurities, which will enter the tank with the gas and affect the GIS device, for example, water in the impurities will accelerate the corrosion inside the GIS device, metal debris will increase the discharge risk inside the device, and these abnormal conditions will affect the overall performance and service life of the GIS device.
[0005] However, according to the existing table valve, there is basically no table valve with filter device, so a table valve with filter device is needed to filter impurities in the gas to avoid the influence of impurities on the performance and service life of GIS device. The utility model discloses a kind of table calibration valves with filtering device for GIS, to solve the problem that impurity enters GIS container with gas and produces performance influence to GIS equipment.
[0006] The utility model discloses a kind of table calibration valves with filtering device for GIS, to solve the problem that impurity enters GIS container with gas and produces performance influence to GIS equipment.
[0007] To solve the above problems, the utility model discloses a kind of table calibration valves with filtering device for GIS adopts the following technical scheme:
[0008] A kind of table calibration valve with filtering device for GIS, including valve body, the channel for gas flow is equipped in the valve body, the one end of the channel is equipped with the joint connecting port for being communicated with self-sealing joint, the other end is equipped with the tank body connecting port for being communicated with GIS tank body joint, the tank body connecting port is equipped with filtering device, the filtering device includes fixed seat, the fixed seat is equipped with the through hole being arranged along the channel axial direction, recess is equipped on the hole wall of the through hole, filter sheet for filtering impurity in gas is equipped in the recess.
[0009] Further, the tank body connecting port is stepped hole, the stepped hole includes relatively large diameter inner hole section and small diameter inner hole section of hole diameter size, the fixed seat is arranged in the small diameter inner hole section, and the fixed seat is prevented from moving axially by the step surface formed by the hole bottom of small diameter inner hole section and the channel, the large diameter inner hole section is equipped with stop ring groove at the end away from the valve body end face, and the elastic stop ring is equipped in the stop ring groove to prevent the axial movement of the fixed seat.
[0010] Further, the fixed seat includes pad close to the step surface and cover plate away from step surface, and the filter sheet is arranged in the gap between pad and cover plate.
[0011] Further, the cover plate includes L-shaped side plate consistent with the length of the small diameter inner hole section and top plate for pressing filter sheet.
[0012] Further, the hole diameter size of the large diameter inner hole section is matched with the outer diameter size of the GIS tank body joint.
[0013] Further, the filter sheet is multilayer metal sintered mesh.
[0014] Further, the fixed seat is polytetrafluoroethylene fixed seat.
[0015] Further, the pad is polytetrafluoroethylene pad.
[0016] Further, the cover plate is polytetrafluoroethylene cover plate.
[0017] Beneficial effects: the utility model discloses a GIS is with filter equipment's table calibration valve for improved practical new creation. The utility model discloses a GIS is with filter equipment's table calibration valve utilizes the existing table calibration valve as the foundation, only to the interface of GIS tank body joint connecting position place improves, can reduce the cost and the loss of resources, improve the utilization of existing quantity table calibration valve, set up filter equipment at the tank body connecting mouth, and the filter equipment simple structure is convenient for directly improving the utilization of existing table calibration valve, the filter equipment includes fixed seat, the fixed seat is equipped with the through -hole of arranging along the channel axial direction, is equipped with the recess on the hole wall of the through -hole, is equipped with the filter sheet for filtering the impurity in gas in the recess, and gas is filled by self -sealing joint end, and is filled into GIS tank body through the filter sheet of setting up at the channel and joint connecting mouth, and the filter sheet is filtered to the impurity of this gas, thereby preventing the moisture, the debris and other impurities in gas from entering GIS tank body with gas and the influence of GIS equipment and performance. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is one embodiment schematic view of the utility model's GIS is with filter equipment's table calibration valve.
[0019] In the drawing: 1, valve body;2, channel;3, joint connecting mouth;4, tank body connecting mouth;5, fixed seat;6, filter sheet;7, step surface;8, large diameter inner hole section;9, small diameter inner hole section;10, elastic baffle ring;11, cushion block;12, side plate;13, top plate. DETAILED DESCRIPTION
[0020] The features and performance of the utility model are further described in detail in combination with the embodiments.
[0021] The utility model discloses a kind of GIS is with filter equipment's table calibration valve in the interface of original table calibration valve and GIS tank body joint communication, increases filter equipment, filters the impurity in gas by filter equipment, avoids the influence of impurity on GIS equipment performance.
[0022] As a kind of basic scheme, as Figure 1As shown, a calibration valve with filtering device for GIS includes a valve body 1, which is basically consistent with the existing calibration valve structure, so as to ensure the matching degree when the calibration valve is connected with the self-sealing joint and the GIS tank joint. The filtering device can be directly added to the existing calibration valve, so as to reduce the influence on the existing equipment, reduce the cost consumption and waste of resources. The valve body 1 is provided with a channel 2 for gas circulation. One end of the channel 2 is provided with a joint connecting port 3 for communication with the self-sealing joint, and the other end is provided with a tank connecting port 4 for communication with the GIS tank joint. The self-sealing joint and the GIS tank are communicated through the channel 2, which not only can complete the inflation work in the GIS tank, but also can ensure the airtightness when the inflation equipment is disconnected after the inflation is completed. The tank connecting port 4 is provided with a filtering device. The filtering device includes a fixed seat 5, which provides stable support for the filter sheet 6 as the basis of the filtering device. The fixed seat 5 is provided with a through hole arranged along the axis of the channel 2. The hole wall of the through hole is provided with a groove. The groove is provided with a filter sheet 6 for filtering impurities in the gas. The filter sheet 6 is installed in the through hole of the fixed seat 5. When SF6 gas is filled into the GIS tank through the channel 2, the filter sheet 6 filters the impurities in the gas in the middle, which can avoid the impurities entering the GIS tank together with the gas and affecting the performance of the equipment in the GIS tank.
[0023] As a preferred embodiment, the tank connecting port 4 is a stepped hole, which includes a large-diameter inner hole section 8 and a small-diameter inner hole section 9 with relatively large and small diameters. The stepped hole not only facilitates the assembly of the fixing seat 5 and the butt joint with the GIS tank joint, but also facilitates the circulation of gas to reduce the formation of vortex or turbulence at the interface position. The fixing seat 5 is arranged in the small-diameter inner hole section 9 and is stop-fitted with the stepped surface 7 formed by the hole bottom of the small-diameter inner hole section 9 and the channel 2. The stepped hole facilitates the assembly of the fixing seat 5. The fixing seat 5 is placed in the small-diameter inner hole section 9 and is stop-fitted with the stepped surface 7 formed by the hole bottom, which can avoid the risk of loosening of the fixing seat 5 and falling into the channel 2 to cause the failure of the filtering device. The large-diameter inner hole section 8 is provided with a stop ring groove at one end away from the end face of the valve body 1. The stop ring groove is provided with an elastic stop ring 10 to stop the axial movement of the fixing seat 5. The elastic stop ring 10 generally adopts a high-strength and high-elasticity metal alloy, which has the advantages of good elasticity, high strength, and high durability, and can keep the fixing seat 5 stable under the impact of gas during inflation. The two ends of the fixing seat 5 are limited by the stepped surface 7 and the elastic stop ring 10, which can avoid the movement of the fixing seat 5 and improve the stability of the filtering device. Moreover, the elastic stop ring 10 has a simple structure and is easy to install. Only a special clamp is needed to compress the elastic stop ring 10 and place it in the stop ring groove. The elastic stop ring 10 can automatically recover to the normal state. In other embodiments, the stop ring can be replaced by a self-locking block to stop the fixing seat 5. The self-locking block needs to be matched with a self-locking groove in the large-diameter inner hole section 8. After the self-locking block is placed in the self-locking groove and rotated, the self-locking is completed. The machining of the self-locking block and the self-locking groove is relatively complex compared with the elastic stop ring 10 and the stop ring groove in the preferred embodiment, but it can achieve the function of stopping and limiting the fixing block.
[0024] As a preferred embodiment, the fixing seat 5 includes a pad 11 close to the stepped surface 7 and a cover plate away from the stepped surface 7, and the filter sheet 6 is arranged in the gap formed between the pad 11 and the cover plate, the pad 11 can provide support for the filter sheet 6, ensuring that the filter sheet 6 can be stably placed in the inner hole and is not easy to shift or fall off, the filter sheet 6 is arranged between the pad 11 and the cover plate, and the filter sheet 6 is pressed on the pad 11 by the cover plate, preventing the filter sheet 6 from moving or deforming during the flow of gas, a good seal is formed between the cover plate, the pad 11 and the hole wall, ensuring that the gas can only pass through the filter sheet 6 for filtering, preventing the leakage of gas, and the cover plate and the pad 11 can also serve as protection for the filter sheet 6 and the inner hole wall of the calibration valve, avoiding the phenomenon that the filter sheet 6 directly contacts the hole wall of the stepped hole of the calibration valve and the abrasion is aggravated and the sealing effect is poor, in addition, the design of the pad 11 and the cover plate in the fixing seat 5 in a separate module facilitates the installation and disassembly of the filter device, and the pad 11, the filter sheet 6 and the cover plate can be installed in the stepped hole one by one, in other embodiments, the pad 11 is not arranged, and the filter sheet 6 is directly pressed on the stepped surface 7 by the cover plate, so that the filter sheet 6 directly contacts the hole bottom of the stepped hole, and under the impact of gas for a long time, the abrasion between the filter sheet 6 and the hole bottom will become more and more obvious, resulting in poor filtering effect and irreversible abrasion of the calibration valve, compared with the preferred embodiment, not only the sealing effect is poor, but also the cost of repairing or replacing the calibration valve is increased, so the filter position needs to be checked and maintained frequently to ensure normal use effect.
[0025] As a preferred embodiment, the cover plate includes an L-shaped side plate 12 consistent with the length of the second inner hole section and a top plate 13 for pressing the filter sheet 6, which further optimizes the cover plate, protects the pad 11 and the filter sheet 6 from direct contact with the hole wall of the stepped hole in the calibration valve through the side plate 12, and also achieves better sealing effect, and the filter sheet 6 is pressed by the top plate 13, and the length of the side plate 12 consistent with the length of the second inner hole section can ensure that the hole bottom of the large-diameter inner hole section 8 in the stepped hole is flush, facilitating the better blocking effect of the retainer ring arranged in the large-diameter inner hole section 8 on the cover plate and the filter sheet 6 and the pad 11.
[0026] As a preferred embodiment, the hole diameter of the first inner hole section is matched with the outer diameter of the GIS tank joint, and the size matching can ensure that the GIS tank joint can be smoothly inserted into the first inner hole section, and further ensure that the gas can be smoothly filled into the GIS tank through the passage 2 and the filter piece 6. If the hole diameter of the first inner hole section is larger than the outer diameter of the GIS tank joint, gas leakage may occur, or if the hole diameter of the first inner hole section is smaller than the outer diameter of the GIS tank joint, the two cannot be connected, which causes the calibration valve to be unable to use. In other embodiments, the hole diameter of the first inner hole section is larger than the outer diameter of the GIS tank joint, which requires further sealing treatment of the interface after the GIS tank joint is inserted into the first inner hole section using adhesive or other structures. Compared with the preferred embodiment, this is more complex, which prolongs the assembly time and reduces the efficiency, but after the sealing treatment, it can also be used normally.
[0027] As a preferred embodiment, the filter piece 6 is a multi-layer metal sintered mesh. The multi-layer sintered metal mesh is manufactured by special layering and pressing and vacuum sintering processes of multi-layer metal woven wire mesh, has high mechanical strength and overall rigidity, and the mesh size can be adjusted according to needs. This unique structure makes the metal sintered mesh have high filtering performance, can effectively intercept impurities, particulate matter and the like in the gas, and improve the cleanliness of the gas. Moreover, the metal sintered mesh is woven from metal wire, has the advantages of compact structure, high strength, and not easy to deform and damage, etc., so the use life of the filtering device is prolonged by selecting the multi-layer sintered metal mesh. In other embodiments, sintered metal fiber felt can be selected. The sintered metal fiber felt is interwoven from metal fibers and sintered, also has high strength and excellent filtering performance, and can meet the filtering requirements of SF6 gas.
[0028] As a preferred embodiment, the fixing seat 5 is a polytetrafluoroethylene fixing seat 5. Polytetrafluoroethylene has excellent temperature resistance. Since GIS devices are mostly outdoor, the polytetrafluoroethylene fixing plate can completely adapt to the variable temperature conditions outdoors and maintain stable physical and chemical properties. Polytetrafluoroethylene also has the advantages of low friction coefficient and electrical insulation, which can avoid wear of the fixing seat 5 on the inner wall of the interface of the calibration valve, and further avoid the situation that the fixing seat 5 is loose or even falls off due to long-term wear. Since the fixing seat 5 includes the pad 11 and the cover plate, the pad 11 is a polytetrafluoroethylene pad 11, and the cover plate is a polytetrafluoroethylene cover plate for the same reason. In other embodiments, nylon fixing plates, polyether ether ketone fixing plates or other non-metal fixing plates can be selected. These non-metal fixing plates also have good wear resistance and can prevent wear between the fixing seat 5 and the inner wall of the interface of the calibration valve.
[0029] The specific usage process of the GIS calibration valve with filter device of this utility model is as follows: Figure 1 As shown, the self-sealing connector is connected to the connector connection port 3 in the valve body 1 of the calibration valve. The SF6 gas in the gas filling equipment flows through the self-sealing connector and into the GIS tank connected at the tank connection port 4 along the gas channel 2. The gas is filtered for impurities by the filter plate 6 set at the tank connection port 4, thereby preventing impurities from entering the GIS tank.
[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A calibration valve with filtering device for GIS, comprising a valve body, a channel for gas flow is arranged in the valve body, one end of the channel is provided with a joint connecting port for communicating with a self-sealing joint, the other end is provided with a tank connecting port for communicating with a GIS tank joint, characterized in that, The filter device is arranged in the tank connecting port, and comprises a fixing seat, a through hole arranged axially along the channel is arranged in the fixing seat, a groove is arranged on the hole wall of the through hole, and a filter sheet for filtering impurities in gas is arranged in the groove.
2. The calibration valve with filter for GIS according to claim 1, characterized in that, The tank connecting port is a stepped hole, the stepped hole comprises a large-diameter inner hole section and a small-diameter inner hole section with relatively large and small diameters, the fixing seat is arranged in the small-diameter inner hole section and is in stop cooperation with a stepped surface formed by the channel through a hole bottom of the small-diameter inner hole section, and the large-diameter inner hole section is provided with a stop ring groove at one end away from the end surface of the valve body, and an elastic stop ring is arranged in the stop ring groove to stop the axial movement of the fixing seat.
3. The calibration valve with filter for GIS according to claim 2, characterized in that, The fixing seat comprises a pad close to the stepped surface and a cover plate away from the stepped surface, and the filter sheet is arranged in a gap formed between the pad and the cover plate.
4. The calibration valve with filter for GIS according to claim 3, characterized in that, The cover plate comprises an L-shaped side plate consistent with the length of the small-diameter inner hole section and a top plate for pressing the filter sheet.
5. The calibration valve with filter for GIS according to claim 2 or 3, characterized in that, The large-diameter inner hole section is matched with the outer diameter of the GIS tank joint in size.
6. The calibration valve with filter for GIS according to claim 1 or 3, characterized in that, The filter sheet is a multi-layer metal sintered mesh.
7. The calibration valve with filter for GIS according to any one of claims 1 to 3, characterized in that, The fixing seat is a polytetrafluoroethylene fixing seat.
8. The calibration valve with filter for GIS according to claim 3, characterized in that, The pad is a polytetrafluoroethylene pad.
9. The calibration valve with filter for GIS according to claim 3, characterized in that, The cover plate is a polytetrafluoroethylene cover plate.