CN206419538U - A kind of swing check valve opening-proof device of push rod structure - Google Patents
A kind of swing check valve opening-proof device of push rod structure Download PDFInfo
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- CN206419538U CN206419538U CN201621452985.2U CN201621452985U CN206419538U CN 206419538 U CN206419538 U CN 206419538U CN 201621452985 U CN201621452985 U CN 201621452985U CN 206419538 U CN206419538 U CN 206419538U
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- push rod
- valve
- 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 a kind of swing check valve opening-proof device of push rod structure.Including push rod, take over a business, the part of expansion nut three；One end of push rod is contacted with the rocking arm of the flap of swing check valve, for the thrust of the present apparatus to be passed into flap, so as to realize the forced seal of swing check valve；The other end of push rod is sets external screw thread, and external screw thread is engaged with expansion nut；The threaded portion insertion of push rod is taken over a business；The one end taken over a business and the threaded portion of push rod coordinate, and the valve body cambered surface of the other end and swing check valve coordinates；Take over a business top identical with valve body globoidal structure.Expansion nut is arranged at push rod screw thread, after the present apparatus is installed on valve, and the cooperation realized push rod by rotary expansion nut and taken over a business is expanded, and realizes the pressuring action of flap, so as to realize the forced seal of check-valves, realizes anti-open function.
Description
Technical field
The utility model belongs to nuclear plant safety experimental technique field, and in particular to a kind of swing type non-return of push rod structure
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 of push rod structure, among nuclear power station debugging, swing type non-return
The flap of valve is with pipeline into 60 ° of angles, and according to valve mechanism, flap is vertical with valve body inclined-plane, and valve is realized by the present apparatus
Sealing；
Including push rod, take over a business, the part of expansion nut three；
One end of push rod is contacted with the rocking arm of the flap of swing check valve, for the thrust of the present apparatus to be passed into valve
Valve, so as to realize the forced seal of swing check valve；The other end of push rod is setting external screw thread, external screw thread and expanding screw parent phase
Coordinate；
The threaded portion insertion of push rod is taken over a business；
The one end taken over a business and the threaded portion of push rod coordinate, and the valve body cambered surface of the other end and swing check valve coordinates；
Expansion nut is arranged at push rod screw thread, after the present apparatus is installed on valve, is realized and pushed up by rotary expansion nut
Bar and the cooperation taken over a business are expanded, and realize the pressuring action of flap, so as to realize the forced seal of check-valves, realize anti-unlatching work(
Energy.
Further, a kind of swing check valve opening-proof device of push rod structure as described above, takes over a business top and valve
Body globoidal structure is identical.
Further, a kind of swing check valve opening-proof device of push rod 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, the swing check valve opening-proof device of a kind of push rod 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, both model check-valves opening-proof devices are
The necessary condition that the overall bulge test of containment is smoothed out is carried out in advance.By the use of this two sets of instruments, Fuqing nuclear power is suitable
Profit completes 1,2, No. 3 overall bulge tests of unit safety shell are adjusted to the debugging optimization of Primary hydraulic test, to shortening machine
The construction period of group serves facilitation.
Brief description of the drawings
Fig. 1 is the utility model apparatus structure schematic diagram.
In figure：Push rod 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, 1RCP120/220/320VP is the NJXSSA0150 types of French VELAN productions
Number screw-lift type check-valves.The flap and pipeline are into 60 ° of angles, and according to valve mechanism, flap is vertical with valve body inclined-plane, can be by
Device is installed in this position, and sealing force is provided for valve.
As shown in figure 1, a kind of swing check valve opening-proof device of push rod structure of the utility model, applied to nuclear power station
Among debugging, the flap of swing check valve is with pipeline into 60 ° of angles, and according to valve mechanism, flap is vertical with valve body inclined-plane, leads to
Crossing the present apparatus makes valve realize sealing；Including push rod, take over a business, the part of expansion nut three；
One end of push rod is contacted with the rocking arm of the flap of swing check valve, for the thrust of the present apparatus to be passed into valve
Valve, so as to realize the forced seal of swing check valve；The other end of push rod is setting external screw thread, external screw thread and expanding screw parent phase
Coordinate；
The threaded portion insertion of push rod is taken over a business；
The one end taken over a business and the threaded portion of push rod coordinate, and the valve body cambered surface of the other end and swing check valve coordinates；Top
It is identical with valve body globoidal structure at the top of disk.
Expansion nut is arranged at push rod screw thread, after the present apparatus is installed on valve, is realized and pushed up by rotary expansion nut
Bar and the cooperation taken over a business are expanded, and realize the pressuring action of flap, so as to realize the forced seal of check-valves, realize anti-unlatching work(
Energy.
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 push rod 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 of push rod structure, among nuclear power station debugging, swing check valve
Flap and pipeline into 60 ° of angles, according to valve mechanism, flap is vertical with valve body inclined-plane, realizes valve by the present apparatus close
Envelope；It is characterized in that：
Including push rod, take over a business, the part of expansion nut three；
One end of push rod is contacted with the rocking arm of the flap of swing check valve, for the thrust of the present apparatus to be passed into flap,
So as to realize the forced seal of swing check valve；The other end of push rod is sets external screw thread, and external screw thread matches with expansion nut
Close；
The threaded portion insertion of push rod is taken over a business；
The one end taken over a business and the threaded portion of push rod coordinate, and the valve body cambered surface of the other end and swing check valve coordinates；
Expansion nut be arranged on push rod screw thread at, after the present apparatus is installed on valve, by rotary expansion nut realize push rod with
The cooperation expansion taken over a business, realizes the pressuring action of flap, so as to realize the forced seal of check-valves, realizes anti-open function.
2. a kind of swing check valve opening-proof device of push rod structure as claimed in claim 1, it is characterised in that：Take over a business
Portion is identical with valve body globoidal structure.
3. a kind of swing check valve opening-proof device of push rod 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 of push rod 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 of push rod structure as claimed in claim 1, it is characterised in that：Take over a business
Portion is identical with valve body globoidal structure；According to flap in swing check valve, the size at valve base sealing position, soft seal pad is set
Piece, 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 |
|---|---|---|---|
| CN201621452985.2U CN206419538U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device of push rod structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621452985.2U CN206419538U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device of push rod structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206419538U true CN206419538U (en) | 2017-08-18 |
Family
ID=59577022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621452985.2U Active CN206419538U (en) | 2016-12-28 | 2016-12-28 | A kind of swing check valve opening-proof device of push rod structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206419538U (en) |
-
2016
- 2016-12-28 CN CN201621452985.2U patent/CN206419538U/en active Active
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