CN212208057U - SF6 online check valve - Google Patents
SF6 online check valve Download PDFInfo
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- CN212208057U CN212208057U CN202021142004.0U CN202021142004U CN212208057U CN 212208057 U CN212208057 U CN 212208057U CN 202021142004 U CN202021142004 U CN 202021142004U CN 212208057 U CN212208057 U CN 212208057U
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Abstract
The utility model relates to the technical field of check valves, in particular to an SF6 online check valve, which comprises a main valve component and an auxiliary valve component, wherein a pressure discharge pipe is connected between the main valve component and the auxiliary valve component; the main valve component comprises a main valve shell, an air inlet pipe is arranged at the lower end of the main valve shell, a gas collecting cavity is arranged at the position, close to the air inlet pipe, of the main valve shell, a main valve seat is arranged at the position, close to the gas collecting cavity, of the main valve shell, a main valve cavity is arranged at the upper end of the main valve seat, and a main valve is arranged inside the main valve cavity. The utility model provides a SF6 online check valve wherein is provided with main valve subassembly and auxiliary valve subassembly, comes to carry out the tonifying qi pressure boost to the SF6 gas in the pipeline through the main valve subassembly, comes to carry out the decompression of exhausting to the SF6 gas in the pipeline through the auxiliary valve subassembly, and two kinds of modes are all proofreaded to the gas in the pipeline for SF6 gas accords with rated pressure, thereby satisfies the working requirement.
Description
Technical Field
The utility model relates to a check valve technical field especially relates to a SF6 online check valve.
Background
In order to reduce the size of the existing 220KV transformer substation, a sulfur hexafluoride (SF6) closed type combined electrical apparatus (also called GIS) is mostly adopted, SF6 gas with rated pressure is filled in the SF6 closed type combined electrical apparatus, the higher the pressure of the SF6 gas is, the better the electrical insulation performance is, and therefore the requirements of constant internal pressure of equipment and good equipment sealing performance are met.
During work of SF6 gas in the prior art, rated pressure of SF6 gas in equipment is difficult to maintain, the work result is affected when the pressure of SF6 gas is too low, and safety problems can be caused when the pressure of SF6 gas is too high.
To the above problem, the utility model provides a SF6 online check valve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that an online check valve of SF6 is provided with main valve subassembly and auxiliary valve subassembly wherein, come the gaseous tonifying qi pressure boost that carries out of SF6 in the pipeline through main valve subassembly, come the gaseous decompression of exhausting of SF6 in the pipeline through auxiliary valve subassembly, two kinds of modes are all proofreaded to the gas in the pipeline for SF6 gas accords with rated pressure, thereby satisfies the working requirement.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: an SF6 online check valve comprises a main valve assembly and an auxiliary valve assembly, wherein a pressure discharge pipe is connected between the main valve assembly and the auxiliary valve assembly.
The main valve assembly comprises a main valve housing, an air inlet pipe is arranged at the lower end of the main valve housing, a gas collecting cavity is arranged at the position, close to the air inlet pipe, of the main valve housing, a main valve seat is arranged at the position, close to the gas collecting cavity, of the main valve housing, a main valve cavity is arranged at the upper end of the main valve seat, and a main valve is arranged inside the main valve cavity; an air outlet is formed in one side, close to the main valve cavity, of the main valve shell; and a main valve pressure sensor is arranged on the outer wall of the main valve shell close to the gas collection cavity, and an SF6 density relay is arranged near the main valve pressure sensor.
Preferably, the main valve member includes a main fixed iron core mounted at an upper end of the main valve cavity, the main valve cavity is connected with the main valve core by a sliding fit, and a main valve spring is connected between the main fixed iron core and the main valve core.
Preferably, the auxiliary valve assembly comprises an auxiliary housing, an auxiliary cavity is arranged in the auxiliary housing, an auxiliary fixed iron core is installed at the upper end of the auxiliary cavity, an auxiliary valve core is connected in the auxiliary cavity in a sliding fit manner, and an auxiliary spring is connected between the auxiliary fixed iron core and the auxiliary valve core.
Preferably, a supplementary pipe is arranged on the side wall of the air inlet pipe, the supplementary pipe is communicated with the air inlet pipe and the gas collecting cavity, and a supplementary cut-off valve is arranged in the middle of the supplementary pipe.
Preferably, the side wall of the auxiliary shell is provided with a discharge pipe, and an auxiliary cut-off valve is installed at the position of the discharge pipe.
Preferably, an auxiliary pressure sensor is arranged on the outer wall of the auxiliary shell and close to the pressure discharge pipe, and an SF6 density relay is arranged near the auxiliary pressure sensor.
Compared with the prior art, the technical scheme of the utility model have following advantage:
1. the utility model provides a SF6 online check valve, wherein be provided with main valve subassembly and auxiliary valve subassembly, come to carry out the tonifying qi pressure boost to the SF6 gas in the pipeline through the main valve subassembly, come to carry out the decompression of exhausting to the SF6 gas in the pipeline through the auxiliary valve subassembly, two kinds of modes are all proofings to the gas in the pipeline for SF6 gas accords with rated pressure, thereby satisfies the working requirement.
2. The SF6 online check valve provided by the utility model has the advantages that the SF6 density relay can measure the real-time pressure in the pipeline, and when the pressure in the pipeline is less than the rated pressure, the gas can be supplemented and pressurized in time by the mutual matching between the supplementary cut-off valve and the main valve piece; when the pressure in the pipeline is higher than the rated pressure, the pressure discharge pipe, the auxiliary valve assembly and the discharge pipe are matched with each other, so that redundant gas can be discharged in time, and the purpose of pressure reduction is achieved.
Drawings
Fig. 1 is the utility model discloses omit the overall structure schematic diagram of posterior lateral plate.
Wherein: the main valve assembly is 1, the main valve housing is 11, the air inlet pipe is 12, the supplementary pipe is 120, the supplementary cut-off valve is 1200, the air collecting cavity is 13, the main valve seat is 14, the main valve cavity is 15, the main valve is 16, the main fixed iron core is 161, the main valve core is 162, the main valve spring is 163, the air outlet is 17, the sensor is 18, the 19SF6 density relay, the auxiliary valve assembly is 2, the auxiliary housing is 21, the auxiliary cavity is 22, the auxiliary fixed iron core is 23, the auxiliary valve core is 24, the auxiliary spring is 25, the exhaust pipe is 26, the auxiliary cut-off.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, the SF6 online check valve comprises a main valve assembly 1 and an auxiliary valve assembly 2, wherein a power supply is mounted outside the main valve assembly 1 and the auxiliary valve assembly 2, and a pressure discharge pipe 3 is connected between the main valve assembly 1 and the auxiliary valve assembly 2.
The main valve component 1 comprises a main valve shell 11, an air inlet pipe 12 is arranged at the lower end of the main valve shell 11, the air inlet pipe 12 is connected with an SF6 gas tank, a gas collection cavity 13 is arranged at the position, close to the air inlet pipe 12, of the main valve shell 11, a main valve seat 14 is arranged at the position, close to the gas collection cavity 13, of the main valve shell 11, the main valve seat 14 and the main valve shell 11 are integrally formed, a main valve cavity 15 is arranged at the upper end of the main valve seat 14, and a main valve; an air outlet 17 is arranged on one side of the main valve shell 11 close to the main valve cavity 15; a main valve pressure sensor 18 is arranged on the outer wall of the main valve shell 11 close to the gas collecting cavity 13, an SF6 density relay 19 is arranged near the main valve pressure sensor 18, and the SF6 density relay 19 can measure real-time pressure in a pipeline.
The main valve 16 includes a main fixed core 161 installed at the upper end of the main valve cavity 15, a main valve 162 is connected in the main valve cavity 15 by a sliding fit, a main valve spring 163 is connected between the main fixed core 161 and the main valve 162, an electromagnetic device is arranged in the main valve housing 11 near the main fixed core 161, the electromagnetic device is matched with the main fixed core 161 and the main valve 162, and the electromagnetic device is connected with a power supply.
The side wall of the air inlet pipe 12 is provided with a supplementary pipe 120, the supplementary pipe 120 is communicated with the air inlet pipe 12 and the air collecting cavity 13, and the middle of the supplementary pipe 120 is provided with a supplementary air stop valve 1200.
In operation, the main valve pressure sensor 18 senses a pressure signal in the line and controls the main valve member 16; the SF6 density relay 19 can measure the real-time pressure in the pipeline, when the pressure of SF6 gas is lower than the rated pressure, the main valve pressure sensor 18 controls the main valve spring 163 in the main valve 16 to push the main valve spool 162 to the sealing surface of the main valve seat 14, so that SF6 gas is isolated inside the gas collecting cavity 13, at this time, the supplement gas stop valve 1200 is opened, so as to supplement the gas in the gas collecting cavity 13, when the appropriate amount of SF6 gas is supplemented, the pressure in the gas collecting cavity 13 reaches the rated pressure, the main valve pressure sensor 18 controls the main valve spring 163 in the main valve 16 to pull the main valve spool 162 to the position of the main fixed core 161, at this time, the supplement pipe 120, the gas inlet pipe 12, the gas collecting cavity 13 and the exhaust port are communicated, and the SF6 gas reaching the rated pressure is discharged from the exhaust port and enters other pipelines.
The auxiliary valve assembly 2 comprises an auxiliary housing 21, the auxiliary housing 21 is communicated with the pressure discharge pipe 3, an auxiliary cavity 22 is arranged in the auxiliary housing 21, an auxiliary fixed iron core 23 is installed at the upper end of the auxiliary cavity 22, an auxiliary valve core 24 is connected in the auxiliary cavity 22 in a sliding fit mode, and an auxiliary spring 25 is connected between the auxiliary fixed iron core 23 and the auxiliary valve core 24.
The side wall of the auxiliary shell 21 is provided with a discharge pipe 26, and an auxiliary cut-off valve 27 is arranged at the position of the discharge pipe 26.
An auxiliary pressure sensor 28 is arranged on the outer wall of the auxiliary shell 21 close to the pressure discharge pipe 3, and an SF6 density relay 19 is arranged near the auxiliary pressure sensor 28.
In specific operation, the auxiliary pressure sensor 28 senses a pressure signal in the pressure discharge pipe 3 and controls the auxiliary valve assembly 2; the SF6 density relay 19 can measure the real-time pressure in the pipeline, when the pressure of SF6 gas is higher than the rated pressure, the main valve pressure sensor 18 controls the main valve spring 163 in the main valve member 16 to push the main valve core 162 to the sealing surface of the main valve seat 14, so that the SF6 gas is isolated in the gas collecting chamber 13, at this time, the supplementary gas stop valve 1200 is in the closed state, the gas in the gas collecting chamber 13 is connected with the auxiliary valve assembly 2 through the exhaust pipe 3, the auxiliary pressure sensor 28 senses the gas higher than the rated pressure, so as to control the auxiliary spring 25 in the auxiliary valve assembly 2 to pull the auxiliary valve core 24 to the position of the auxiliary fixed core 23, the auxiliary valve assembly 2 is opened, so that the exhaust pipe 3, the auxiliary chamber 22 and the exhaust pipe 26 are communicated, the auxiliary gas stop valve 27 is opened, the SF6 gas is rapidly exhausted from the exhaust pipe 3 and the exhaust pipe 26, when the pressure in the pipeline is reduced to the rated, the main valve pressure sensor 18 controls the main valve member 16 to open and SF6 gas is vented from the exhaust port into the other piping for operation.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An SF6 online verification valve, including a main valve assembly (1) and an auxiliary valve assembly (2), characterized in that: a pressure discharge pipe (3) is connected between the main valve component (1) and the auxiliary valve component (2);
the main valve component (1) comprises a main valve shell (11), an air inlet pipe (12) is arranged at the lower end of the main valve shell (11), a gas collection cavity (13) is arranged at the position, close to the air inlet pipe (12), of the main valve shell (11), a main valve seat (14) is arranged at the position, close to the gas collection cavity (13), of the main valve shell (11), a main valve cavity (15) is arranged at the upper end of the main valve seat (14), and a main valve element (16) is arranged inside the main valve cavity (15); an air outlet (17) is formed in one side, close to the main valve cavity (15), of the main valve shell (11); and a main valve pressure sensor (18) is arranged on the outer wall of the main valve shell (11) close to the gas collection cavity (13), and an SF6 density relay (19) is arranged near the main valve pressure sensor (18).
2. An SF6 online check valve as recited in claim 1, wherein: the main valve (16) comprises a main fixed iron core (161) arranged at the upper end of the main valve cavity (15), the main valve cavity (15) is internally connected with a main valve core (162) in a sliding fit mode, and a main valve spring (163) is connected between the main fixed iron core (161) and the main valve core (162).
3. An SF6 online check valve as recited in claim 1, wherein: the auxiliary valve assembly (2) comprises an auxiliary shell (21), an auxiliary cavity (22) is arranged in the auxiliary shell (21), an auxiliary fixed iron core (23) is installed at the upper end of the auxiliary cavity (22), an auxiliary valve core (24) is connected in the auxiliary cavity (22) in a sliding fit mode, and an auxiliary spring (25) is connected between the auxiliary fixed iron core (23) and the auxiliary valve core (24).
4. An SF6 online check valve as recited in claim 1, wherein: the side wall of the air inlet pipe (12) is provided with a supplement pipe (120), the supplement pipe (120) is communicated with the air inlet pipe (12) and the air collecting cavity (13), and a supplement cut-off valve (1200) is installed in the middle of the supplement pipe (120).
5. An SF6 online check valve as in claim 3, wherein: and a discharge pipe (26) is arranged on the side wall of the auxiliary shell (21), and an auxiliary cut-off valve (27) is arranged at the position of the discharge pipe (26).
6. An SF6 online verification valve as in claim 5, wherein: the outer wall of the auxiliary shell (21) is close to the position of the pressure discharge pipe (3) and is provided with an auxiliary pressure sensor (28), and the position close to the auxiliary pressure sensor (28) is provided with the SF6 density relay (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142004.0U CN212208057U (en) | 2020-06-18 | 2020-06-18 | SF6 online check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142004.0U CN212208057U (en) | 2020-06-18 | 2020-06-18 | SF6 online check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212208057U true CN212208057U (en) | 2020-12-22 |
Family
ID=73809415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021142004.0U Active CN212208057U (en) | 2020-06-18 | 2020-06-18 | SF6 online check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212208057U (en) |
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2020
- 2020-06-18 CN CN202021142004.0U patent/CN212208057U/en active Active
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