CN112902020A - Spare valve position switching device for pneumatic valve - Google Patents
Spare valve position switching device for pneumatic valve Download PDFInfo
- Publication number
- CN112902020A CN112902020A CN202110333116.7A CN202110333116A CN112902020A CN 112902020 A CN112902020 A CN 112902020A CN 202110333116 A CN202110333116 A CN 202110333116A CN 112902020 A CN112902020 A CN 112902020A
- Authority
- CN
- China
- Prior art keywords
- valve
- way valve
- gas
- air
- switching device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to the field of nuclear power safety, in particular to a standby valve position switching device for a pneumatic valve, which comprises: the air source interface is used for connecting an external air source; the switch valve is used for switching off/on the connection between the switching device and the air source; the pressure adjusting unit is used for adjusting the gas pressure output by the gas source; the air-charging interface is used for connecting an external air-charging device; compared with the prior art, the multi-way valve is used for switching the working state of the device, and can ensure that certain pneumatic valves which are important for power generation in a nuclear power plant can still temporarily maintain working valve positions after the pneumatic valves break down, thereby saving time for equipment maintenance. The invention designs a spare valve position switching device of a nuclear power station pneumatic valve, which is simple and reliable.
Description
Technical Field
The invention relates to the field of nuclear power safety, in particular to a standby valve position switching device for a pneumatic valve.
Background
CAP1000 and CAP1400 nuclear power plants adopt passive conceptual design. All pneumatic valves are designed to be in a failure safety mode, namely, the pneumatic valves can run to a safety valve position after air and electricity are lost. Some of the safety-stage pneumatic valves can be switched to a safety valve position after a design basis accident, but if a loss of air occurs during normal operation, a shutdown may result due to the valve position switching.
The air compressor and the air storage tank of the CAP1000 and CAP1400 nuclear power plants are both in an unsafe design because the air compressor and the air storage tank do not bear safety functions, and air sources can be lost once faults occur. If the passive safety protection system of the nuclear power plant is put into operation and an accidental shutdown is caused, great economic loss exists.
Accordingly, there remains a need in the art for improvements.
Disclosure of Invention
The device can be used for temporarily opening the pneumatic valve of the nuclear power station after the air is lost, and strives for enough time for recovering the air compression system.
The invention adopts the following technical scheme:
a pneumatic valve standby valve position switching device comprising:
the air source interface is used for connecting an external air source;
the switch valve is used for switching off/on the connection between the switching device and the air source;
the pressure adjusting unit is used for adjusting the gas pressure output by the gas source;
the air-charging interface is used for connecting an external air-charging device;
the multi-way valve is provided with three stations, when the multi-way valve is positioned at a first station, gas output by an external gas source flows through the gas source interface, the switch valve and the pressure regulating unit and then is communicated with the atmosphere, when the multi-way valve is positioned at a second station, the gas using device is communicated with the atmosphere, and when the multi-way valve is positioned at a third station, the gas output by the external gas source flows through the gas source interface, the switch valve, the pressure regulating unit and the gas connecting interface and then flows into the external gas using device;
the air source interface, the switch valve, the pressure regulating unit, the multi-way valve and the air receiving interface are sequentially connected through a pipeline.
Further, the multi-way valve comprises a first three-way valve and a second three-way valve, an air inlet of the first three-way valve is communicated with an air outlet of the pressure regulating unit through a pipeline, a first air outlet of the first three-way valve is communicated with an air inlet of the second three-way valve, and a second air outlet of the first three-way valve is communicated with the atmosphere; and the air outlet of the second three-way valve is communicated with the air inlet, and the third port of the second three-way valve is communicated with the atmosphere.
Further, when the switching device is in the air supply state, the second air outlet of the first three-way valve is closed, and the air inlet of the first three-way valve is communicated with the first air outlet; when the switching device is in a pre-gas supply state, the first gas outlet of the first three-way valve is closed, and the gas inlet of the first three-way valve is communicated with the second gas outlet.
Further, when the switching device is in the air supply state, the third port of the second three-way valve is closed, and the air inlet and the air outlet of the second three-way valve are communicated; when the switching device is in an air-charging pressure relief state, the air inlet of the second three-way valve is closed, and the third port of the second three-way valve is communicated with the air outlet.
Further, an inlet of a safety valve is connected between the pressure adjusting unit and the first three-way valve, an outlet of the safety valve is connected with the external atmosphere, when the pressure value output by the pressure adjusting unit exceeds a first threshold value, the inlet of the first three-way valve is closed, and the pressure adjusting unit is communicated with the outlet of the safety valve.
Further, the pressure adjusting unit includes a throttle valve.
Furthermore, a pressure gauge is connected between the pressure adjusting unit and the first three-way valve.
The invention has the beneficial effects that: after the pneumatic valve loses air due to faults, the device can be connected with an exhaust port of the pneumatic solenoid valve. Under the condition that the exhaust port of the electromagnetic valve is communicated with the cylinder, the air is supplied to the cylinder through the device, and the pneumatic valve is switched to a non-failure valve position and is maintained. The invention can ensure that certain pneumatic valves in the nuclear power plant which are important for power generation can still temporarily maintain the working valve position after the pneumatic valves are in fault, thereby saving time for equipment maintenance. The invention designs a spare valve position switching device of a nuclear power station pneumatic valve, which is simple and reliable.
Drawings
Fig. 1 is a schematic diagram of a standby valve position switching device of a pneumatic valve provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, a standby valve position switching device for a pneumatic valve includes:
the air source interface 2 is used for connecting an external air source 1;
a switching valve 3 for switching off/on the connection of the switching device with the gas source 1;
the throttle valve 4 is used for adjusting the gas pressure output by the gas source 1;
an air inlet 9 for connecting an external air using device through a metal pipe 10;
the multi-way valve is provided with three stations, when the multi-way valve is positioned at a first station, gas output by an external gas source flows through the gas source interface 2, the switch valve 3 and the throttle valve 4 and then is communicated with the atmosphere, when the multi-way valve is positioned at a second station, the gas using device is communicated with the atmosphere, and when the multi-way valve is positioned at a third station, the gas output by the external gas source flows into the external gas using device after flowing through the gas source interface, the switch valve, the pressure adjusting unit and the gas connecting port;
the air source interface, the switch valve, the pressure regulating unit, the multi-way valve and the air receiving interface are sequentially connected through a pipeline.
Further, the multi-way valve comprises a first three-way valve 7 and a second three-way valve 8, an air inlet of the first three-way valve 7 is communicated with an air outlet of the throttle valve 4 through a pipeline, a first air outlet of the first three-way valve 7 is communicated with an air inlet of the second three-way valve 8, and a second air outlet of the first three-way valve 7 is communicated with the atmosphere; the air outlet of the second three-way valve 8 is communicated with the air inlet 9, and the third opening of the second three-way valve 8 is communicated with the atmosphere.
Further, when the switching device is in the air supply state, the second air outlet of the first three-way valve 7 is closed, and the air inlet of the first three-way valve 7 is communicated with the first air outlet; before communicating with external gas device, the first gas outlet of first three-way valve 7 is closed, the income gas port and the second gas outlet intercommunication of first three-way valve 7, by the export pressure of operating personnel earlier adjusted the device, later with the auto-change over device switch over to the gas supply state.
Further, when the switching device is in the air supply state, the third port of the second three-way valve 8 is closed, and the air inlet and the air outlet of the second three-way valve 8 are communicated; when the switching device is in the air-charging pressure relief state, the air inlet of the second three-way valve 8 is closed, and the third port of the second three-way valve 8 is communicated with the air outlet and is used for rapidly exhausting the air-charging cylinder to enable the valve to enter the failure valve position.
Further, an inlet of a safety valve 5 is connected between the throttle valve 4 and the first three-way valve 7, an outlet of the safety valve 5 is connected with the external atmosphere, when the pressure value output by the throttle valve 4 exceeds a first threshold value, the inlet of the first three-way valve 7 is closed, and the throttle valve 4 is communicated with the outlet of the safety valve 5.
Further, a pressure gauge 6 is connected between the throttle valve 4 and the first three-way valve 7.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A standby valve position switching device for a pneumatic valve is characterized by comprising:
the air source interface is used for connecting an external air source;
the switch valve is used for switching off/on the connection between the switching device and the air source;
the pressure adjusting unit is used for adjusting the gas pressure output by the gas source;
the air-charging interface is used for connecting an external air-charging device;
the multi-way valve is provided with three stations, when the multi-way valve is positioned at a first station, gas output by an external gas source flows through the gas source interface, the switch valve and the pressure regulating unit and then is communicated with the atmosphere, when the multi-way valve is positioned at a second station, the gas using device is communicated with the atmosphere, and when the multi-way valve is positioned at a third station, the gas output by the external gas source flows through the gas source interface, the switch valve, the pressure regulating unit and the gas connecting interface and then flows into the external gas using device;
the air source interface, the switch valve, the pressure regulating unit, the multi-way valve and the air receiving interface are sequentially connected through a pipeline.
2. A pneumatic valve standby valve position switching device according to claim 1, wherein the multi-way valve includes a first three-way valve and a second three-way valve, an air inlet of the first three-way valve is communicated with an air outlet of the pressure adjusting unit through a pipeline, a first air outlet of the first three-way valve is communicated with an air inlet of the second three-way valve, and a second air outlet of the first three-way valve is communicated with the atmosphere; and the air outlet of the second three-way valve is communicated with the air inlet, and the third port of the second three-way valve is communicated with the atmosphere.
3. A pneumatic valve standby valve position switching device as claimed in claim 2, wherein when the switching device is in a gas supply state, the second gas outlet port of the first three-way valve is closed, and the gas inlet port of the first three-way valve is in communication with the first gas outlet port; when the switching device is in a pre-gas supply state, the first gas outlet of the first three-way valve is closed, and the gas inlet of the first three-way valve is communicated with the second gas outlet.
4. A pneumatic valve standby valve position switching device as in claim 2, wherein when the switching device is in a gas supply state, the third port of the second three-way valve is closed, and the gas inlet and the gas outlet of the second three-way valve are communicated; when the switching device is in an air-charging pressure relief state, the air inlet of the second three-way valve is closed, and the third port of the second three-way valve is communicated with the air outlet.
5. A pneumatic valve standby valve position switching device according to claim 2, wherein an inlet of a relief valve is further connected between the pressure adjusting unit and the first three-way valve, an outlet of the relief valve is connected to an external atmosphere, the inlet of the first three-way valve is closed when a pressure value outputted from the pressure adjusting unit exceeds a first threshold value, and the pressure adjusting unit is communicated with the outlet of the relief valve.
6. A pneumatic valve standby position switching device as in claim 1, wherein said pressure regulating unit includes a throttle valve.
7. A pneumatic valve standby valve position switching device as in claim 2, further characterized in that a pressure gauge is connected between said pressure regulating unit and said first three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333116.7A CN112902020A (en) | 2021-03-29 | 2021-03-29 | Spare valve position switching device for pneumatic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333116.7A CN112902020A (en) | 2021-03-29 | 2021-03-29 | Spare valve position switching device for pneumatic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112902020A true CN112902020A (en) | 2021-06-04 |
Family
ID=76109222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110333116.7A Withdrawn CN112902020A (en) | 2021-03-29 | 2021-03-29 | Spare valve position switching device for pneumatic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112902020A (en) |
-
2021
- 2021-03-29 CN CN202110333116.7A patent/CN112902020A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108091908B (en) | Fuel cell hydrogen supply system and control method thereof | |
| CN110296320B (en) | Nitrogen gas supply system | |
| CN109216732B (en) | High-pressure hydrogen supply system of hydrogen fuel cell ship | |
| CN205841927U (en) | A kind of emergency cut-off valve control system | |
| CN214890515U (en) | Spare valve position switching device for pneumatic valve | |
| CN112902020A (en) | Spare valve position switching device for pneumatic valve | |
| CN112576805A (en) | Air supply system and method for pneumatic valve actuating mechanism | |
| CN103727392A (en) | Important instrument air source switching device | |
| CN210829929U (en) | Compressed air supply system of electric pole production workshop | |
| CN114530615B (en) | Fuel cell engine capable of preventing hydrogen air pressure difference from being excessive and control method thereof | |
| CN202812802U (en) | Important instrument air source switching device | |
| CN214900320U (en) | Uninterrupted power supply system of emergency shut-off valve of natural gas pressure regulating station | |
| CN210576244U (en) | Hydrogen supply device for hydrogen fuel cell | |
| CN203783648U (en) | Device for discharging hydrogen safely under emergency condition | |
| CN213810035U (en) | Integrated pressure relief protection device on test board of hydrogen fuel cell system | |
| CN112066256A (en) | Natural gas pressure regulating station system with protection device | |
| CN112252402A (en) | Non-negative pressure water supply equipment | |
| CN216743845U (en) | Bleeding valve redundancy control device and natural gas pressure regulating station of gas power plant thereof | |
| CN214377692U (en) | Passive containment cooling system with gas storage device | |
| CN217951965U (en) | Natural gas pressure regulating station fire alarm shutoff valve actuating mechanism control system | |
| CN218935392U (en) | Pneumatic valve structure of redundant transformation | |
| CN220132369U (en) | Safety device for controlling liquid level deviation of hydrogen production device and hydrogen production system | |
| CN214580426U (en) | ESD valve control system for gas supply of gas turbine power plant | |
| CN213366633U (en) | Pressure regulation failure protection device for hydrogen fuel cell | |
| CN216928644U (en) | High pressure safety vented hydrogen system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
|
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210604 |