Converter transformer valve side sleeve inflation tool and method

Abstract

The invention relates to a converter transformer valve side sleeve inflation tool and method, and belongs to the technical field of converter transformers. According to the technical scheme, one end of a first stainless steel pipe (1) is provided with threads and is in threaded connection with an SF6 equipment interface, a first round flange (2) is welded to the other end of the first stainless steel pipe (1), the first round flange (2) is connected with one end of a valve (3) through a bolt, the other end of the valve (3) is connected with a second round flange (4) through a bolt, and the second round flange (4) is welded to one end of a second stainless steel pipe (5); the other end of the second stainless steel pipe (5) is welded to one end of a transition connector (6), the other end of the transition connector (6) is connected with a connector (7), the connector (7) is in threaded connection with a valve side sleeve side SF6 connector, and an ejector pin (10) is arranged in the transition connector (6). The SF6 gas can be filled into a converter transformer domestic valve side sleeve factory, dew point, micro water and purity detection can be carried out on the internal gas, the use is convenient, and the effect is good.

Description

Technical Field

[0001] The invention relates to a converter transformer valve side bushing inflation tool and method, belonging to the technical field of converter transformers. Background Art

[0002] The converter transformer is one of the key core equipment of the UHV DC transmission project, and the valve side bushing is the core component of the converter transformer. The bushing needs to be filled with SF6 gas before the finished product test. The thread specification of the domestic valve side bushing filling interface is a self-sealing joint of M27*1.5, and the thread specification of the conventional SF6 equipment filling tool joint is a self-sealing joint of M45*2. The threads of the domestic valve bushing side and the SF6 equipment side joints cannot match, and the bushing cannot be filled with gas or gas detection. Therefore, this field urgently needs to design a filling tool to meet the requirements of filling the bushing with SF6 gas. Summary of the invention

[0003] The purpose of the present invention is to provide a converter transformer valve side bushing inflation tool and method, the tool has a reasonable structure, is easy to use, and has good coordination, thus solving the above-mentioned problems existing in the background technology.

[0004] The technical solution of the present invention is: A valve side bushing inflation tool for a converter transformer comprises a stainless steel pipe, a round flange, a valve, a round flange, a stainless steel pipe, a transition joint, a joint and a thimble. One end of the stainless steel pipe is threaded and threadedly connected to an SF6 equipment interface. The other end of the stainless steel pipe is welded with a round flange. The round flange is bolted to one end of the valve. The other end of the valve is bolted to the round flange. The round flange is welded to one end of the stainless steel pipe. The other end of the 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. A thimble is arranged in the transition joint. The thimble is used to push open the self-sealing joint at the SF6 interface on the valve side bushing.

[0005] Furthermore, a sealing gasket 1 and a sealing gasket 2 are provided on the inner ring of the joint, which are used to seal the SF6 interface connection on the valve side casing side.

[0006] Furthermore, a sealing gasket three and a sealing gasket four are respectively provided between the circular flange one and the flange at one end of the valve, and between the circular flange two and the flange at the other end of the valve.

[0007] A method for inflating a valve side bushing of a converter transformer, using the above-mentioned converter transformer valve side bushing inflation tooling, threading one end of a stainless steel tube of the converter transformer valve side bushing inflation tooling on an SF6 device interface connection, then threading a joint of the converter transformer valve side bushing inflation tooling on an SF6 interface on the valve side bushing side, during the process of tightening the joint, a pin pushes open a self-sealing joint at the SF6 interface on the valve side bushing side, opens an internal air cavity of the valve side bushing, and fills the valve side bushing with SF6 gas through the SF6 device.

[0008] The positive effects of the present invention are as follows: the present invention can meet the requirements of filling SF6 gas into the domestic valve-side bushing of the converter transformer and perform dew point, trace water and purity detection on the internal gas; the present invention is easy to use and has good effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram of the actual use state of the present invention; In the figure: stainless steel pipe 1, round flange 1, 2, valve 3, round flange 2, 4, stainless steel pipe 2, 5, transition joint 6, joint 7, sealing gasket 1, 8, sealing gasket 2, 9, ejector pin 10, sealing gasket 3, 11, sealing gasket 4, 12. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: A valve side bushing inflation tool for a converter transformer 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 ejector pin 10. One end of the stainless steel pipe 1 is threaded and threadedly connected to an SF6 equipment interface. A round flange 2 is welded to the other end of the stainless steel pipe 1. The round flange 2 is bolted to one end of the valve 3. The other end of the valve 3 is bolted to the round flange 4. 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 the SF6 interface on the valve side bushing. An ejector pin 10 is arranged in the transition joint 6. The ejector pin 10 is used to push open the self-sealing joint at the SF6 interface on the valve side bushing.

[0011] 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 casing side.

[0012] 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 .

[0013] A method for inflating a valve side bushing of a converter transformer, using the above-mentioned converter transformer valve side bushing inflation tooling, threading one end of a stainless steel pipe 1 of the converter transformer valve side bushing inflation tooling on an SF6 device interface connection, then threading a joint 7 of the converter transformer valve side bushing inflation tooling on an SF6 interface on the valve side bushing side, during the tightening process of the joint 7, a pin 10 pushes open the self-sealing joint at the SF6 interface on the valve side bushing side, opens the internal air cavity of the valve side bushing, and fills the valve side bushing with SF6 gas through the SF6 device.

[0014] Refer to the attached Figure 1 The valve side bushing inflation tooling of the converter transformer is mainly composed of 12 parts. One end of the stainless steel pipe 1 is threaded and connected to the SF6 equipment interface. The round flange 2 is a four-hole flange, and one end of the round flange 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 2 by bolts. The round flange 24 is a four-hole flange, and the round flange 24 is connected to the other end of the valve 3 by bolts. The sealing gasket 3 11 and the sealing gasket 4 12 are used to seal the connection between the round flange 24 and the valve. One end of the stainless steel pipe 25 is welded to the round flange 24, one end of the transition joint 6 is welded to the other end of the stainless steel pipe 25, 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. It is machined and made. The thread specification of the joint 7 is M27*1.5, which matches the thread specification of the domestic valve side bushing inflation interface. Sealing gasket 1 8 and sealing gasket 2 9 are used to seal the connection with the SF6 interface on the valve side casing side. The ejector pin 10 is machined and is used to push open the self-sealing joint at the SF6 interface on the valve side casing side during the tightening process of the joint 7 to open the internal air cavity of the valve side casing.

[0015] After trial production, the tooling has been successfully used to charge SF6 gas into the domestic valve-side bushing of converter transformers. It can meet the needs of charging SF6 gas into the domestic valve-side bushing of converter transformers in factories, and perform dew point, trace water and purity detection on the internal gas. It is easy to use and has good results.

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 2, 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).

4. A method for inflating a converter transformer valve side bushing, using the converter transformer valve side bushing inflation tooling according to any one of claims 1 to 3, characterized in that: One end of the stainless steel pipe (1) of the converter transformer valve side bushing charging tooling is threadedly connected to the SF6 equipment interface connection, and then the connector (7) of the converter transformer valve side bushing charging tooling is threadedly connected to the SF6 interface on the valve side bushing side. During the tightening process of the connector (7), the ejector pin (10) pushes open the self-sealing connector at the SF6 interface on the valve side bushing side, opens the internal air cavity of the valve side bushing, and fills the valve side bushing with SF6 gas through the SF6 equipment.

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