Inflation tool for valve side sleeve of converter transformer
By designing an inflatable tooling suitable for the valve side sleeve of the domestic converter transformer, the problem of mismatch between the thread specifications of the sleeve and the SF6 equipment joint thread is solved, and the inflation and gas detection of the sleeve is achieved, which is convenient to use and has good results.
Patent Information
- Application Number
- CN202422841434.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The inflatable interface thread specifications of the valve side sleeve of the domestic converter transformer do not match the thread specifications of the inflatable tool joints of conventional SF6 equipment, resulting in the inflatable casing being unable to inflate and gas detection.
A converter transformer valve-side casing inflatable tooling is designed, which uses stainless steel pipes, round flanges, valves, transition joints, joints and thimbles. By adjusting the thread specifications of the joints, a sealing gasket and thimble are installed at the joints to ensure the convenience of sealing and inflation operations.
It realizes the filling of SF6 gas from the valve side casing of the domestic converter transformer, and supports the detection of dew point, water and purity of internal gases, which is easy to use and has good results.
Smart Images
Figure CN223035940U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gas filling tool for a valve side bushing of a converter transformer, belonging to the technical field of converter transformers. Background Art
[0002] The converter transformer is one of the key core equipment in the UHV DC transmission project. The valve side bushing is the core component of the converter transformer, and some converter transformers adopt domesticated valve side bushings. Before the finished product test, the bushing needs to be filled with SF6 gas. The thread specification of the gas filling interface of the domestic valve side bushing is a self-sealing joint with M27*1.5, and the thread specification of the gas filling tool joint of the conventional SF6 equipment is a self-sealing joint with M45*2. The thread of the domestic valve side bushing and the SF6 equipment side cannot be matched, so the bushing cannot be filled with gas and the gas detection cannot be carried out. Therefore, there is an urgent need in the art to design a gas filling tool to meet the requirement of filling SF6 gas into the bushing. Content of the Utility Model
[0003] The purpose of the utility model is to provide a gas filling tool for a valve side bushing of a converter transformer, with reasonable structure, convenient use and good cooperation, so as to solve the problems existing in the background art.
[0004] The technical solution of the utility model is as follows:
[0005] A gas filling tool for a valve side bushing of a converter transformer includes a first stainless steel pipe, a first circular flange, a valve, a second circular flange, a second stainless steel pipe, a transition joint, a joint and a thimble. One end of the first stainless steel pipe is threaded and is threadedly connected to the SF6 equipment interface. The other end of the first stainless steel pipe is welded with the first circular flange. The first circular flange is bolted to one end of the valve. The other end of the valve is bolted to the second circular flange. The second circular flange is welded to one end of the second stainless steel pipe. The other end of the second stainless steel pipe is welded to one end of the transition joint. The other end of the transition joint is connected to the joint. The joint is threadedly connected to the SF6 interface on the valve side bushing side. A thimble is arranged inside the transition joint, and the thimble is used to push open the self-sealing joint at the SF6 interface on the valve side bushing side.
[0006] Further, a first sealing washer and a second sealing washer are arranged on the inner ring of the joint for sealing at the connection with the SF6 interface on the valve side bushing side.
[0007] Further, a third sealing washer and a fourth sealing washer are respectively arranged between the first circular flange and the flange at one end of the valve and between the second circular flange and the flange at the other end of the valve.
[0008] The positive effect of the utility model: It can meet the requirement of filling SF6 gas into the domestic valve side bushing of the converter transformer in the factory and detect the dew point, micro water and purity of the internal gas, with convenient use and good effect. Description of the Drawings
[0009] Figure 1This is a schematic structural diagram of the utility model;
[0010] In the figure: stainless steel pipe 1, circular flange 1, valve 3, circular flange 2, stainless steel pipe 2, transition joint 6, joint 7, sealing washer 1, sealing washer 2, thimble 10, sealing washer 3, sealing washer 4. Specific implementation mode
[0011] The following further describes the utility model in conjunction with the drawings and embodiments:
[0012] An inflation tooling for the valve side bushing of a converter transformer includes a stainless steel pipe 1, a circular flange 1, a valve 3, a circular flange 2, a stainless steel pipe 2, a transition joint 6, a joint 7 and a thimble 10. One end of the stainless steel pipe 1 is threaded and threadedly connected to the SF6 equipment interface. The other end of the stainless steel pipe 1 is welded with a circular flange 1. The circular flange 1 and one end of the valve 3 are bolted. The other end of the valve 3 and the circular flange 2 are bolted. The circular flange 2 is welded to one end of the stainless steel pipe 2. The other end of the stainless steel pipe 2 is welded to one end of the transition joint 6. The other end of the transition joint 6 is connected to the joint 7. The joint 7 is threadedly connected to the SF6 interface on the valve side bushing side. A thimble 10 is provided inside the transition joint 6 for pushing open the self-sealing joint at the SF6 interface on the valve side bushing side.
[0013] Sealing washers 1 and 2 are provided on the inner ring of the joint 7 for sealing at the connection with the SF6 interface on the valve side bushing side.
[0014] Sealing washers 3 and 4 are respectively provided between the circular flange 1 and one end flange of the valve 3 and between the circular flange 2 and the other end flange of the valve 3.
[0015] Refer to the appendix Figure 1, the gas filling tooling for the valve side bushing of the converter transformer mainly consists of 12 parts. One end of the stainless steel pipe 1 is machined with threads and connected to the SF6 equipment interface. The round flange 1 2 is a four-hole flange, and one end of the round flange 1 2 is welded to the other end of the stainless steel pipe 1. One end of the valve 3 is connected to the round flange 1 2 by bolts. The round flange 2 4 is a four-hole flange, and the round flange 2 4 is connected to the other end of the valve 3 by bolts. The sealing gaskets 3 11 and the sealing gasket 4 12 are used for sealing at the connection between the round flange 2 4 and the valve. One end of the stainless steel pipe 2 5 is welded to the round flange 2 4, one end of the transition joint 6 is welded to the other end of the stainless steel pipe 2 5, and the other end of the transition joint 6 is connected to the joint 7. The joint 7 is used to connect to the SF6 interface on the valve side bushing side and is manufactured by machining. The thread specification of the joint 7 is M27*1.5, which matches the thread specification of the domestic valve side bushing gas filling interface. The sealing gaskets 1 8 and the sealing gasket 2 9 are used for sealing at the connection with the SF6 interface on the valve side bushing side. The thimble 10 is manufactured by machining and is used to push open the self-sealing joint at the SF6 interface on the valve side bushing side during the tightening process of the joint 7, opening the internal gas cavity of the valve side bushing.
[0016] The usage method of the present utility model is as follows: Thread one end of the stainless steel pipe 1 of the gas filling tooling for the valve side bushing of the converter transformer onto the SF6 equipment interface connection, and then thread the joint 7 of the gas filling tooling for the valve side bushing of the converter transformer onto the SF6 interface on the valve side bushing side. During the tightening process of the joint 7, the thimble 10 pushes open the self-sealing joint at the SF6 interface on the valve side bushing side, opening the internal gas cavity of the valve side bushing, and filling SF6 gas into the valve side bushing through the SF6 equipment.
[0017] After trial production, this tooling has been successfully used for filling SF6 gas into domestic valve side bushings of converter transformers, can meet the requirements of filling SF6 gas into domestic valve side bushings of converter transformers in the factory, and conduct dew point, trace moisture and purity detection on the internal gas. It is convenient to use and has good usage effects.
Claims
1. A converter transformer valve side bushing inflation tool, characterized in that: The invention comprises a stainless steel pipe (1), a round flange (2), a valve (3), a round flange (4), a stainless steel pipe (5), a transition joint (6), a joint (7) and a pin (10), wherein one end of the stainless steel pipe (1) is threaded and is threadedly connected to an interface of an SF6 device, the other end of the stainless steel pipe (1) is welded with a round flange (2), the round flange (2) is connected to one end of the valve (3) by bolts, the other end of the valve (3) is connected to the round flange (4) by bolts, the round flange (4) is welded to one end of the stainless steel pipe (5), the other end of the stainless steel pipe (5) is welded to one end of the transition joint (6), the other end of the transition joint (6) is connected to the joint (7), the joint (7) is threadedly connected to an SF6 interface on the valve side casing side, and a pin (10) is arranged inside the transition joint (6), the pin (10) is used to push open the self-sealing joint at the SF6 interface on the valve side casing side.
2. The converter transformer valve side bushing inflation tool according to claim 1, characterized in that: The inner ring of the joint (7) is provided with a sealing gasket 1 (8) and a sealing gasket 2 (9) for sealing the connection with the SF6 interface on the valve side and the casing side.
3. The converter transformer valve side bushing inflation tool according to claim 1, characterized in that: A sealing gasket three (11) and a sealing gasket four (12) are respectively provided between the circular flange one (2) and the flange at one end of the valve (3), and between the circular flange two (4) and the flange at the other end of the valve (3).