CN205824369U - A kind of pilot operated safety valve inservice inspection device - Google Patents
A kind of pilot operated safety valve inservice inspection device Download PDFInfo
- Publication number
- CN205824369U CN205824369U CN201620662174.9U CN201620662174U CN205824369U CN 205824369 U CN205824369 U CN 205824369U CN 201620662174 U CN201620662174 U CN 201620662174U CN 205824369 U CN205824369 U CN 205824369U
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- valve
- manual switching
- pilot
- switching valve
- operated safety
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Abstract
The utility model discloses a kind of pilot operated safety valve inservice inspection device, including main valve and pilot valve, also include first manual switching valve, the second manual switching valve, nitrogen cylinder and Pressure gauge.Main valve connects pipeline by two valves and is connected with pilot valve.First manual switching valve and the second manual switching valve are separately positioned on two valves and connect on pipeline.First manual switching valve is connected with nitrogen cylinder by gas transmission line.Second manual switching valve is connected with safety exhaust point by exhaust line.A kind of pilot operated safety valve inservice inspection device of the present utility model, two manual switching valves have been installed additional between the main valve and pilot valve of pilot operated safety valve, each manual switching valve is combined by two stop valves, it is capable of isolating pilot valve and system media, and pilot valve is pressurizeed by the nitrogen cylinder connected, detects, by two manual switching valves, pilot valve is connected with medium system again after being completed, realize pilot operated safety valve conveniently inservice inspection with this.
Description
Technical field
This utility model relates to a kind of pilot operated safety valve inservice inspection device for nuclear power field.
Background technology
In existing nuclear power station, some nuclear power station spring loaded safety valves (include nuclear power main steam relief valve and manostat
Relief valve) require, at system worked well pressure or less than in the case of service pressure, there is in-service calibration of set-pressure
Function.The method of the verification of set-pressure is, installs a hydraulic jack at the top of valve rod, increases by one and bullet by oil cylinder
The power that spring force is in opposite direction, makes relief valve open.Read the Pressure gauge numerical value in hydraulic cylinder when relief valve is opened, at known hydraulic pressure
The effective area of cylinder piston, relief valve effective sealing area in the case of, the set-pressure of relief valve can be calculated.This is
A kind of method indirectly verifying safety valve set pressure.But nuclear power station pilot operated safety valve, due to its structure and spring
Relief valve is different, it is impossible to use hydraulic jack to carry out Checking and Adjustment pressure as spring loaded safety valve.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of pilot operated safety valve inservice inspection
Device, its simple in construction, is easily achieved, and is installed on pilot operated safety valve, can directly verify the whole of pilot operated safety valve
Constant-pressure.
A kind of technical scheme realizing above-mentioned purpose is: a kind of pilot operated safety valve inservice inspection device, including main valve and
Pilot valve, also includes first manual switching valve, the second manual switching valve, nitrogen cylinder and Pressure gauge.
Described main valve connects pipeline by two valves and is connected with pilot valve.
Described first manual switching valve and described second manual switching valve are separately positioned on two described valves and connect pipeline
On.
Described first manual switching valve is connected with described nitrogen cylinder by gas transmission line.
Described second manual switching valve is connected with safety exhaust point by exhaust line.
Described Pressure gauge is arranged on described nitrogen cylinder.
Further, described first manual switching valve is identical, by cut-off of adjusting with the structure of described second manual switching valve
Valve and work stop valve connect composition.
Further, the interface thread of stop valve adjusted described in seals by arranging plug screw and pad.
A kind of pilot operated safety valve inservice inspection device of the present utility model, between the main valve and pilot valve of pilot operated safety valve
Having installed two manual switching valves additional, each manual switching valve is combined by two stop valves, it is possible to realize pilot valve and system
Medium is isolated, and is pressurizeed pilot valve by the nitrogen cylinder connected, detected, again will by two manual switching valves after being completed
Pilot valve connects with medium system, realizes pilot operated safety valve conveniently inservice inspection with this.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of pilot operated safety valve inservice inspection device of the present utility model.
Detailed description of the invention
In order to enable preferably the technical solution of the utility model to be understood, below by specifically embodiment and combine
Accompanying drawing is described in detail:
Refer to Fig. 1, pilot operated safety valve inservice inspection device of the present utility model, including main valve 1 and pilot valve 2, also wrap
Include first manual switching valve the 3, second manual switching valve 4, nitrogen cylinder 5 and Pressure gauge 6.
Main valve 1 connects pipeline by two valves and is connected with pilot valve 2, forms pilot operated safety valve.Pilot valve 2 is a spring
Formula relief valve, the action (opening and closing) of main valve 1 is controlled by pilot valve 2.
First manual switching valve 3 is identical with the structure of the second manual switching valve 4, by stop valve 31 and the work stop valve adjusted
32 connect composition.The interface thread of stop valve 31 adjusted seals by arranging plug screw and pad, it is ensured that stop valve 31 of adjusting
No leakage during unlatching.First manual switching valve 3 and the second manual switching valve 4 are arranged on two valves by work stop valve 32 respectively
Door connects on pipeline.The stop valve 31 of adjusting of first manual switching valve 3 is connected with nitrogen cylinder 5 by gas transmission line.Second is manual
The stop valve of adjusting of switching valve 4 is connected with safety exhaust point 7 by exhaust line.Pressure gauge 6 is arranged on described nitrogen cylinder 5.
Operate as follows when pilot operated safety valve is carried out in-service calibration of set-pressure:
1) keep the stop valve 32 of adjusting in first manual switching valve 3 to be closed, first manual is switched in valve 3
Adjust the plug screw of interface end of stop valve 31 and pad is removed, by the pipe joint sealed, nitrogen cylinder 5 is switched with first manual
Valve 1 is adjusted stop valve 32 the port of export be connected.
2) stop valve that keeps adjusting in the second manual switching valve 4 is closed, and will adjust in the second manual switching valve 4
The plug screw of the interface end of stop valve and pad are removed, by the pipe joint sealed and pipeline adjusting the second manual switching valve 4
The outlet section end of stop valve is connected to a safety exhaust point 7.
3) the work stop valve 32 first manual switched respectively in valve 3 and the second manual switching valve 4 is closed, and makes pilot valve 2
Isolate with system media.
4) stop valve 31 of adjusting in first manual switching valve 3 is opened, by the needle valve on control nitrogen cylinder 5 to pilot valve
2 slowly pressurize, until pilot valve 2 is opened, are recorded the unlatching pressure of pilot valve 2 by Pressure gauge 6, and carry out with the set-pressure required
Relatively.
5) it is adjusted if desired for set-pressure, can be adjusted by adjusting the adjustment screw rod of pilot valve 2.
6) after calibration of set-pressure completes, closing the needle valve of nitrogen cylinder 5, opening adjusts in the second manual switching valve 4 cuts
Only valve, gets rid of the nitrogen in the cavity of pilot valve 2.Close adjusting in first manual switching valve 3 and the second manual switching valve 4 to cut
Only valve 31, removes the pipe joint being connected with stop valve 31 of adjusting, and then with plug screw and pad, first manual switches valve 3 and second
The outlet of stop valve 31 end of adjusting in manual switching valve 4 is blocked.
7) then open the work stop valve 32 in first manual switching valve 3 and the second manual switching valve 4, make pilot-operated type pacify
Full valve returns to normal operating conditions.
A kind of pilot operated safety valve inservice inspection device of the present utility model, simple in construction, low cost, processing ease, make
With convenient, directly can verify the set-pressure of pilot operated safety valve, reliability is high.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to illustrate that this practicality is new
Type, and it is not used as to restriction of the present utility model, as long as in spirit of the present utility model, to the above
The change of embodiment, modification all will fall in Claims scope of the present utility model.
Claims (3)
1. a pilot operated safety valve inservice inspection device, including main valve and pilot valve, it is characterised in that also include that first manual is cut
Change valve, the second manual switching valve, nitrogen cylinder and Pressure gauge:
Described main valve connects pipeline by two valves and is connected with pilot valve；
Described first manual switching valve and described second manual switching valve are separately positioned on two described valves and connect on pipeline；
Described first manual switching valve is connected with described nitrogen cylinder by gas transmission line；
Described second manual switching valve is connected with safety exhaust point by exhaust line；
Described Pressure gauge is arranged on described nitrogen cylinder.
A kind of pilot operated safety valve inservice inspection device the most according to claim 1, it is characterised in that described first manual
Switching valve is identical with the structure of described second manual switching valve, and by adjusting, stop valve forms with work stop valve connection.
A kind of pilot operated safety valve inservice inspection device the most according to claim 2, it is characterised in that described in adjust cut-off
The interface thread of valve seals by arranging plug screw and pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620662174.9U CN205824369U (en) | 2016-06-29 | 2016-06-29 | A kind of pilot operated safety valve inservice inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620662174.9U CN205824369U (en) | 2016-06-29 | 2016-06-29 | A kind of pilot operated safety valve inservice inspection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205824369U true CN205824369U (en) | 2016-12-21 |
Family
ID=57566311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620662174.9U Active CN205824369U (en) | 2016-06-29 | 2016-06-29 | A kind of pilot operated safety valve inservice inspection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205824369U (en) |
-
2016
- 2016-06-29 CN CN201620662174.9U patent/CN205824369U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |