CN206419539U - A kind of swing check valve opening-proof device for pushing up fork structure - Google Patents
A kind of swing check valve opening-proof device for pushing up fork structure Download PDFInfo
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- CN206419539U CN206419539U CN201621453572.6U CN201621453572U CN206419539U CN 206419539 U CN206419539 U CN 206419539U CN 201621453572 U CN201621453572 U CN 201621453572U CN 206419539 U CN206419539 U CN 206419539U
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- valve
- fork
- flap
- check valve
- swing check
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Abstract
The utility model belongs to nuclear plant safety experimental technique field, and in particular to pitch the swing check valve opening-proof device of structure in a kind of top.The flap of swing check valve is vertical with pipeline, by applying the pretightning force with pipeline axial direction on flap, valve is realized sealing；The present apparatus is generally 3 parts：Push up fork, expansion nut and take over a business；The outlet of swing check valve, top fork and valve flap contacts are placed into when the present apparatus is used, take over a business the tube contacts with valve export reducing.The air seal test of many deck valve doors is completed by using the device, experiment shows that the device can realize 0 leakage, will not produce influence to result of the test.The use of the device, smoothly completing for testing containment C classes serves most important effect.
Description
Technical field
The utility model belongs to nuclear plant safety experimental technique field, and in particular to pitch the swing type non-return of structure in a kind of top
Valve opening-proof device.
Background technology
For M310 heap-type nuclear power generating sets, according to normal unit regulation order, Primary hydraulic test should be first carried out, so
Carry out the overall bulge test of containment again afterwards.Before overall bulge test will under accident conditions security function associated mechanical run through
First of isolating valve carries out leakage test inside and outside part R factory buildings.
The safety-related mechanical penetration piece of M310 heap-type nuclear power generating sets totally 82, RIS systems 261,263,104,207,
101st, the 8 deck valves door (RIS046/047/048/049/069/070/071/081VP) on 102 this 6 penetration pieces is non-return
Valve on valve, this 8 deck valve passage downstream pipeline only has this 6 swing types of RIS072/073/074VP and RCP120/220/320VP
Check-valves, this 6 deck valve passage downstream is directly connected with primary Ioops, it is impossible to set up experiment border by the method for pass hull closure.
So being in the case where Primary hydraulic test buck stage main pipeline has the operating mode of 2.5MPa back pressures according to common practice
Carry out, valve seal test pressure is 0.42MPa, and back pressure 2.5MPa may insure that valve is closed.
But the stages such as construction, debugging due to nuclear power are influenceed by key equipment delivery cycle, it is impossible to debugged on schedule
Work, for example, all available situation can not can not carry out Primary hydraulic test etc. in DCS.Week is built to save as far as possible
Phase, the overall bulge test of containment is adjusted to carry out before Primary hydraulic test according to actual conditions.Do not carried on the back in primary Ioops
In the case of pressure, check-valves opening-proof device can be used to set up experiment border, be played greatly to shortening the Construction of Nuclear Electricity cycle
Facilitation.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of simple and direct device, and medium can only be leaned on certainly by changing check-valves
Body pressure realizes the idea opened and closed, and facilitation is played to adjusting debugging order according to actual conditions during Construction of Nuclear Electricity.
In order to realize this purpose, the utility model is adopted the technical scheme that：
A kind of swing check valve opening-proof device for pushing up fork structure, among nuclear power station debugging, swing type non-return
The flap of valve is vertical with pipeline, by applying the pretightning force with pipeline axial direction on flap, valve is realized sealing；
The present apparatus is generally 3 parts：Push up fork, expansion nut and take over a business；
The outlet of swing check valve, top fork and valve flap contacts are placed into when the present apparatus is used, takes over a business and becomes with valve export
The tube contacts in footpath；
Top fork includes two parts, and on top, one end of fork is 2 jaws, and the present apparatus and swing check valve are increased by jaw
Flap contact area, make to act on pretightning force on the flap of swing check valve closer to actual condition, control simultaneously
The stabilization of the present apparatus in use；On top, the other end of fork is an externally threaded fork handle of setting, external screw thread and expanding screw parent phase
Mutually coordinate；
The threaded portion insertion of top fork fork handle is taken over a business；
Take over a business including two parts, a part is card, card is the disc-shaped structure with the conical surface, it is axially fixed for carrying out
Position；Another part is sleeve, is coordinated with the threaded portion of top fork fork handle；
Expansion nut is arranged on the threaded portion of top fork fork handle, swollen by sleeve rotating after the present apparatus is installed on valve
Expansion nut, makes whole device axial stretching there is provided the pretightning force that valve is closed, so as to realize the forced seal of check-valves, realizes
Anti- open function.
Further, a kind of swing check valve opening-proof device for pushing up fork structure as described above, card is the band conical surface
Disc-shaped structure, the pipeline of the conical surface and valve export reducing cooperates.
Further, a kind of swing check valve opening-proof device for pushing up fork structure as described above, stops according to swing type
Flap, the size at valve base sealing position in valve are returned, soft seal pad is set, and is placed between flap and valve seat.
Further, a kind of swing check valve opening-proof device for pushing up fork structure as described above, soft seal pad
Thickness is 0.5-1mm.
The beneficial effect of technical solutions of the utility model is：The airtight examination of many deck valve doors is completed by using the device
Test, experiment shows that the device can realize 0 leakage, influence will not be produced on result of the test.The use of the device, to containment C classes
Smoothly completing for experiment serves most important effect, and for M310 units, this model check-valves opening-proof device is to carry
It is preceding to carry out the necessary condition that the overall bulge test of containment is smoothed out.By the use of this set instrument, Fuqing nuclear power is smoothly complete
Into 1,2, No. 3 overall bulge tests of unit safety shell are adjusted to the debugging optimization of Primary hydraulic test, to shortening unit
Construction period serves facilitation.
Brief description of the drawings
Fig. 1 is the utility model apparatus structure schematic diagram.
In figure：Top fork 1, expansion nut 2 and take over a business 3.
Embodiment
The technical scheme that the utility model is provided is further illustrated below in conjunction with the accompanying drawings：
By taking No. 1 unit of Fuqing nuclear power as an example, 1RIS072/073/074VP stops for the screw-lift type of domestic NJXSSA0150 models
Valve is returned, the model valve, flap is vertical with pipeline, the pretightning force with pipeline axial direction can be applied on flap, valve is realized
Sealing.
As shown in figure 1, a kind of swing check valve opening-proof device for pushing up fork structure of the utility model, the present apparatus is generally
3 parts：Push up fork, expansion nut and take over a business；
The outlet of swing check valve, top fork and valve flap contacts are placed into when the present apparatus is used, takes over a business and becomes with valve export
The tube contacts in footpath；
Top fork includes two parts, and on top, one end of fork is 2 jaws, and the present apparatus and swing check valve are increased by jaw
Flap contact area, make to act on pretightning force on the flap of swing check valve closer to actual condition, control simultaneously
The stabilization of the present apparatus in use；On top, the other end of fork is an externally threaded fork handle of setting, external screw thread and expanding screw parent phase
Mutually coordinate；
The threaded portion insertion of top fork fork handle is taken over a business；
Take over a business including two parts, a part is card, card is the disc-shaped structure with the conical surface, it is axially fixed for carrying out
Position；Card is the disc-shaped structure with the conical surface, and the pipeline of the conical surface and valve export reducing cooperates.
Another part is sleeve, is coordinated with the threaded portion of top fork fork handle；Expansion nut is arranged on the screw thread of top fork fork handle
Part, after the present apparatus is installed on valve, by sleeve rotating expansion nut, making whole device axial stretching, there is provided valve pass
The pretightning force closed, so as to realize the forced seal of check-valves, realizes anti-open function.
Concrete operations of the present utility model are as follows：
1. disintegration screw-lift type check-valves, takes bonnet away；
2. according to flap, the size at valve base sealing position, make 0.5-1mm soft seal pad, and be placed into flap with
Between valve seat；
3. screw-lift type check-valves opening-proof device is placed into screw-lift type non-return valve outlet, device top fork and valve flap contacts,
Take over a business the tube contacts with valve export reducing；
4. realizing the compression of flap by rotary expansion nut, start to carry out leakage test to experiment valve；Leakage test
During using leak detection liquid detection flap at whether gas leakage, then increase flap thrust if any gas leakage；
5. after the leakage test of valve terminates, being unclamped by rotary expansion nut and taking out opening-proof device, return dress and spin up
Formula check-valves bonnet.
Claims (5)
1. a kind of swing check valve opening-proof device for pushing up fork structure, among nuclear power station debugging, swing check valve
Flap it is vertical with pipeline, by flap apply with pipeline axial direction pretightning force, make valve realize sealing；Its feature exists
In：
The present apparatus is generally 3 parts：Push up fork, expansion nut and take over a business；
The outlet of swing check valve, top fork and valve flap contacts are placed into when the present apparatus is used, are taken over a business and valve export reducing
Tube contacts；
Top fork includes two parts, and on top, one end of fork is 2 jaws, increases the valve of the present apparatus and swing check valve by jaw
The contact area of valve, makes to act on the pretightning force on the flap of swing check valve closer to actual condition, while controlling this to fill
Put stabilization in use；On top, the other end of fork is an externally threaded fork handle of setting, external screw thread and expansion nut phase interworking
Close；
The threaded portion insertion of top fork fork handle is taken over a business；
Take over a business including two parts, a part is card, card is the disc-shaped structure with the conical surface, for carrying out axially position；Separately
A part is sleeve, is coordinated with the threaded portion of top fork fork handle；
Expansion nut is arranged on the threaded portion of top fork fork handle, after the present apparatus is installed on valve, passes through sleeve rotating expanding screw
Mother, makes whole device axial stretching there is provided the pretightning force that valve is closed, so as to realize the forced seal of check-valves, realizes anti-open
Open function.
2. a kind of swing check valve opening-proof device for pushing up fork structure as claimed in claim 1, it is characterised in that：Card is
Disc-shaped structure with the conical surface, the pipeline of the conical surface and valve export reducing cooperates.
3. a kind of swing check valve opening-proof device for pushing up fork structure as claimed in claim 1, it is characterised in that：According to rotation
Flap, the size at valve base sealing position in opening formula check-valves, set soft seal pad, and be placed between flap and valve seat.
4. a kind of swing check valve opening-proof device for pushing up fork structure as claimed in claim 3, it is characterised in that：Soft seal
The thickness of pad is 0.5-1mm.
5. a kind of swing check valve opening-proof device for pushing up fork structure as claimed in claim 1, it is characterised in that：Card is
Disc-shaped structure with the conical surface, the pipeline of the conical surface and valve export reducing cooperates；According to flap, valve in swing check valve
The size of seat sealing position, sets soft seal pad, and be placed between flap and valve seat；The thickness of soft seal pad is 0.5-
1mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621453572.6U CN206419539U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device for pushing up fork structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621453572.6U CN206419539U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device for pushing up fork structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206419539U true CN206419539U (en) | 2017-08-18 |
Family
ID=59576413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621453572.6U Active CN206419539U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device for pushing up fork structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206419539U (en) |
-
2016
- 2016-12-28 CN CN201621453572.6U patent/CN206419539U/en active Active
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