CN207261768U - Nuclear power station valve tightness test connecting device - Google Patents
Nuclear power station valve tightness test connecting device Download PDFInfo
- Publication number
- CN207261768U CN207261768U CN201721098498.5U CN201721098498U CN207261768U CN 207261768 U CN207261768 U CN 207261768U CN 201721098498 U CN201721098498 U CN 201721098498U CN 207261768 U CN207261768 U CN 207261768U
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- China
- Prior art keywords
- nuclear power
- power station
- station valve
- valve tightness
- tightness test
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Abstract
The utility model discloses a kind of nuclear power station valve tightness test connecting device, it includes：Switching device, including sealed end and connecting pin, sealed end are located at the inside of valves test interface, and connecting pin is connected with leak tightness test device；And clamp nut, positioned at the outside of valves test interface, for fixed transfer device；Wherein, switching device is equipped with the through hole that self sealss end is through to connecting pin, and the axial side wall of sealed end is equipped with the seal groove of annular, and seal groove is embedded with O-ring seal, and O-ring seal is contacted with the inner wall of valves test interface.Relative to the prior art, the utility model nuclear power station valve tightness test connecting device has the following advantages：Using the design of switching device compression O-ring seal, when clamp nut clamp load torque is smaller, it can guarantee that the decrement of O-ring seal, realize sealing function, reduce processing cost, reduce the working strength of testing crew, improve work efficiency, saved the duration.
Description
Technical field
The utility model belongs to technical field of nuclear power, more specifically, it is close to the utility model is related to a kind of nuclear power station valve
Envelope property test connecting device.
Background technology
The stage is debugged in nuclear power station, according to《Nuclear-safety-related system and equipment routine test supervision outline》Requirement, must
Seal tightness test must be carried out to containment isolating valve.Valve tightness measurement refers to measure the leakproofness of valve, to protect
It is qualified to demonstrate,prove valve leak rate.Valve tightness qualification is to realize the essential condition of containment overall tightness.
At present, in the nuclear power plant technique design phase, valve test interface has been reserved.Valves test interface structure such as Fig. 1
Shown, in unit normal operating phase, valves test interface 10 is sealed using plug 200, and plug is dome-type structure, and is used
Clamp nut 202 is compressed to ensure its leakproofness, and clamp nut 202 is metric system M40 coarse thread nuts, and this nut is made without sealing
With.In addition, valve tightness experimental rig is G1/2 internal threads, can not be directly connected with valves test interface 10, therefore, it is necessary to
A set of connection devices is provided to connect valves test interface and valve tightness experimental rig.
Refer to shown in Fig. 2, the prior art processes metal ball-head 204 on the top of existing switching device, passes through compression
Nut 202 contacts metal ball-head 204 and the conical surface of inboard wall of valves test interface, to realize sealing.
But the prior art still suffers from problems with：1) in order to ensure seal request, the machining accuracy of metal ball-head 204
It is required that high, difficulty of processing is big, adds processing cost；2) metal ball-head 204 is easily scratched by foreign matter in use, is scratched
Damage afterwards cannot be repaired under technical conditions at the scene, add use cost；3) the install failure rate of metal ball-head 204 is high,
In use repeatedly sealing is just can guarantee that, it is necessary to adjust.
In view of this, tested it is necessory to provide a kind of high nuclear power station valve tightness of facility, sealing reliability of dismantling
Attachment device.
Utility model content
The purpose of this utility model is that：The defects of overcoming the prior art, there is provided one kind dismounting is convenient, sealing reliability is high
Nuclear power station valve tightness test connecting device.
To achieve these goals, the utility model provides a kind of nuclear power station valve tightness test connecting device, its
Including：
Switching device, including sealed end and connecting pin, sealed end are located at valves test interface internal, connecting pin and leakproofness
Experimental rig connects；And
Clamp nut, positioned at the outside of valves test interface, for fixed transfer device；
Wherein, switching device is equipped with the through hole that self sealss end is through to connecting pin, and the axial side wall of sealed end is equipped with
The seal groove of annular, seal groove are embedded with O-ring seal, and O-ring seal is contacted with the inner wall of valves test interface.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, the valves test interface
Internal diameter be gradually reduced from close to one end of sealed end toward away from one end of sealed end.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, the valves test interface
Inner wall be first conical surface, it is close to first conical surface of valves test interface that clamp nut screws pusher turn connection device so that O
Type sealing ring and the first taper-face contact.
As the utility model nuclear power station valve tightness test connecting device one kind improve, the sealed end be equipped with
Corresponding second conical surface of first conical surface, second conical surface are equipped with seal groove, and O-ring seal is sheathed in the seal groove.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, and the switching device also wraps
Interlude is included, interlude is connected with sealed end close to one end of connecting pin, and interlude is equipped with having three pyramidal faces.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, first conical surface, the
Two conical surfaces, the cone angle of having three pyramidal faces are identical.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, and the clamp nut is close
One end of connecting pin is equipped with along the boss protruded close to switching device direction.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, and the switching device also wraps
Fixed section is included, between connecting pin and sealed end, fixed section is connected fixed section with interlude.
One kind as the utility model nuclear power station valve tightness test connecting device is improved, and the fixed section is close to even
The one end for connecing end is equipped with and the corresponding groove of boss.
As the utility model nuclear power station valve tightness test connecting device one kind improve, the O-ring seal with
Seal groove is interference fitted.
Relative to the prior art, the utility model nuclear power station valve tightness test connecting device has below beneficial to effect
Fruit：1) using the design of switching device compression O-ring seal, when clamp nut clamp load torque is smaller, still can guarantee that O-shaped close
The decrement of seal, realizes sealing；2) using the low switching device of requirement on machining accuracy, processing cost can effectively be reduced；3) adopt
With the O-ring seal of price material benefit, it is convenient to replace, and reduces use cost；4) attachment device is easily installed and dismantles, and reduces
The working strength of testing crew, reduces probability of the people because of failure, improves work efficiency, saved the duration.
Brief description of the drawings
With reference to the accompanying drawings and detailed description, to the utility model nuclear power station valve tightness test connecting device and
Its technique effect is described in detail, wherein：
Fig. 1 is the structure diagram of valves test interface.
Fig. 2 is the structure diagram of prior art nuclear power station valve tightness test connecting device.
Fig. 3 is structure diagram (the O-ring seal compression of the utility model nuclear power station valve tightness test connecting device
Before).
Fig. 4 is structure diagram (the O-ring seal compression of the utility model nuclear power station valve tightness test connecting device
Afterwards).
Fig. 5 is the enlarged diagram of A in Fig. 4 the utility model nuclear power station valve tightness test connecting devices.
Embodiment
In order to become apparent from the purpose of this utility model, technical solution and its advantageous effects, below in conjunction with attached drawing
And embodiment, the utility model is further elaborated.It should be appreciated that the tool described in this specification
Body embodiment is not to limit the utility model just for the sake of explaining the utility model.
Refer to shown in Fig. 3 to Fig. 5, the utility model nuclear power station valve tightness test connecting device includes：
Switching device 30, including sealed end 302 and connecting pin 304, sealed end 302 are located at the interior of valves test interface 10
Portion, connecting pin 304 are connected with leak tightness test device (not shown)；And
Clamp nut 40, positioned at the outside of valves test interface 10, for fixed transfer device 30；
Wherein, switching device 30 is equipped with the through hole 300 that self sealss end 302 is through to connecting pin 304, sealed end 302
Axial side wall is equipped with the seal groove 306 of annular, and seal groove 306 is embedded with O-ring seal 308, O-ring seal 308 and valve
The inner wall contact of test interface 10.
Refer to shown in Fig. 3 to Fig. 5, the internal diameter of valves test interface 10 is from one end of close sealed end 302 toward away from close
One end of end-blocking 302 is gradually reduced, and the inner wall of valves test interface 10 is first conical surface 102, and clamp nut 40 promotes after screwing
First conical surface 102 of switching device 30 to valves test interface 10 is close so that O-ring seal 308 connects with first conical surface 102
Touch.In order to ensure that switching device 30 is not interfered with first conical surface 102, sealed end 302 is equipped with corresponding with first conical surface 102
Second conical surface 310, second conical surface 310 is equipped with seal groove 306, and O-ring seal 308 is sheathed in seal groove 306, O-shaped close
Seal 308 is interference fitted with seal groove 306.Switching device 30 further includes interlude 312, and interlude 312 and sealed end 302 are close
One end connection of connecting pin 304, interlude 312 are equipped with having three pyramidal faces 314, and interlude 312 is installed less than O-ring seal 308
Position, first conical surface 102, second conical surface 310, the cone angle of having three pyramidal faces 314 are identical, ensure that the only O-shaped sealing of switching device 30
Circle 308 is contacted with first conical surface 102.
An embodiment according to the present utility model, the cone angle of first conical surface 102 of valves test interface 10 is 18 °,
In order to which switching device 30 is not interfered with first conical surface 102 when ensureing installation, the cone angle of second conical surface 310 of sealed end 302
Also it is 18 °, in addition, the cone angle of having three pyramidal faces 314 is also 18 °, is designed more than, ensure that the only O-shaped sealing of switching device 30
Circle 308 is contacted with first conical surface 102.
An embodiment according to the present utility model, connecting pin 304 are G1/2 external screw threads, and O-ring seal 308 is preferably
O-shaped rubber ring.O-shaped rubber ring specification is internal diameter * outside diameters * line footpaths=35*28.8*3.1 (mm).According to the specification of O-shaped rubber ring,
It can determine installation site of the O-shaped rubber ring on switching device 30, O-shaped rubber ring takes interference fit with seal groove 306
Mounting means, the slot bottom footpath of seal groove 306 is 28.9mm, slightly larger than the internal diameter of O-shaped rubber ring, seal groove 306 itself it is straight
Footpath is 3mm, is slightly less than the line footpath of O-shaped rubber ring.It so not only ensure that the installation fastening of O-shaped rubber ring, can also reduce O-shaped
Distortion and displacement when rubber ring is compressed, improve sealing performance.Surface roughness of seal groove 306 etc. in conversion equipment 30
Level is not less than 6.3.The decrement of O-shaped rubber ring is about 1.5mm.
Refer to shown in Fig. 3 to Fig. 5, clamp nut 40 is equipped with along close to switching device 30 close to one end of connecting pin 304
The boss 402 that direction protrudes, switching device 30 further include fixed section 316, and fixed section 316 is located at connecting pin 304 and sealed end 302
Between, fixed section 316 is connected with interlude 312, and fixed section 316 is equipped with corresponding with boss 402 close to one end of connecting pin 304
Groove (not shown).The cooperation of switching device 30 and clamp nut 40, it is ensured that switching device 30 and valves test interface 10
Can effective centering, and then make O-shaped rubber ring compression uniform, improve sealing performance, the mutual cooperation of boss 402 and groove is further
Improve sealing performance.
Refer to shown in Fig. 3 to Fig. 5, the operation principle of the utility model nuclear power station valve tightness test connecting device
For：
O-ring seal 308 is installed on the seal groove 306 of switching device 30, switching device 30 and valves test interface 10
Docking, then places clamp nut 40, then screws clamp nut 40, promotes switching device 30 the to valves test interface 10
One conical surface 102 is close, and O-ring seal 308 is contacted and compressed with first conical surface 102, so as to fulfill sealing.
It should be noted that during installation and experiment, can be by switching device 30 and valves test interface 10
Interface pressurization spray leak detection liquid at the same time to detect the leakproofness of attachment device.
According to description more than to the utility model embodiment, relative to the prior art, the utility model nuclear power
Valve tightness of standing test connecting device has the advantages that：1) setting for O-ring seal 308 is compressed using switching device 30
Meter, when 40 clamp load torque of clamp nut is smaller, still can guarantee that the decrement of O-ring seal 308, realizes sealing；2) use
The low switching device 30 of requirement on machining accuracy, can effectively reduce processing cost；3) O-ring seal 308 of price material benefit is used, more
Change conveniently, reduce use cost；4) attachment device is easily installed and dismantles, and reduces the working strength of testing crew, reduces
Probability of the people because of failure, improves work efficiency, has saved the duration.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying carries out appropriate change and modification.Therefore, the utility model is not limited to specific implementation disclosed and described above
Some modifications and changes of the utility model should also be as falling into the scope of the claims of the utility model by mode.
In addition, although used some specific terms in this specification, but these terms are merely for convenience of description, not to this reality
With new composition any restrictions.
Claims (10)
- A kind of 1. nuclear power station valve tightness test connecting device, it is characterised in that including：Switching device, including sealed end and connecting pin, sealed end are located at the inside of valves test interface, and connecting pin is tried with leakproofness Experiment device connects；AndClamp nut, positioned at the outside of valves test interface, for fixed transfer device；Wherein, switching device is equipped with the through hole that self sealss end is through to connecting pin, and the axial side wall of sealed end is equipped with annular Seal groove, seal groove is embedded with O-ring seal, and O-ring seal is contacted with the inner wall of valves test interface.
- 2. nuclear power station valve tightness test connecting device according to claim 1, it is characterised in that the valves test The one end of the internal diameter of interface from close to one end of sealed end toward away from sealed end is gradually reduced.
- 3. nuclear power station valve tightness test connecting device according to claim 1, it is characterised in that the valves test The inner wall of interface is first conical surface, and it is close to first conical surface of valves test interface that clamp nut screws pusher turn connection device, So that O-ring seal and the first taper-face contact.
- 4. nuclear power station valve tightness test connecting device according to claim 3, it is characterised in that the sealed end is set Have and be equipped with seal groove with corresponding second conical surface of first conical surface, second conical surface, O-ring seal is sheathed on the seal groove It is interior.
- 5. nuclear power station valve tightness test connecting device according to claim 4, it is characterised in that the switching device Interlude is further included, interlude is connected with sealed end close to one end of connecting pin, and interlude is equipped with having three pyramidal faces.
- 6. nuclear power station valve tightness test connecting device according to claim 5, it is characterised in that first cone Face, second conical surface, the cone angle of having three pyramidal faces are identical.
- 7. nuclear power station valve tightness test connecting device according to claim 1, it is characterised in that the clamp nut It is equipped with close to one end of connecting pin along the boss protruded close to switching device direction.
- 8. nuclear power station valve tightness test connecting device according to claim 7, it is characterised in that the switching device Fixed section is further included, between connecting pin and sealed end, fixed section is connected fixed section with interlude.
- 9. nuclear power station valve tightness test connecting device according to claim 8, it is characterised in that the fixed section leans on One end of nearly connecting pin is equipped with and the corresponding groove of boss.
- 10. nuclear power station valve tightness test connecting device according to claim 1, it is characterised in that the O-shaped sealing Circle is interference fitted with seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721098498.5U CN207261768U (en) | 2017-08-30 | 2017-08-30 | Nuclear power station valve tightness test connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721098498.5U CN207261768U (en) | 2017-08-30 | 2017-08-30 | Nuclear power station valve tightness test connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261768U true CN207261768U (en) | 2018-04-20 |
Family
ID=61922706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721098498.5U Active CN207261768U (en) | 2017-08-30 | 2017-08-30 | Nuclear power station valve tightness test connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207261768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340479A (en) * | 2018-11-02 | 2019-02-15 | 首都航天机械有限公司 | A kind of space flight Special valve heteromorphic connector switching device |
| CN111667931A (en) * | 2020-05-08 | 2020-09-15 | 福建福清核电有限公司 | Reactor pressure vessel neutron flux measurement channel seal assembly and replacement method thereof |
-
2017
- 2017-08-30 CN CN201721098498.5U patent/CN207261768U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340479A (en) * | 2018-11-02 | 2019-02-15 | 首都航天机械有限公司 | A kind of space flight Special valve heteromorphic connector switching device |
| CN111667931A (en) * | 2020-05-08 | 2020-09-15 | 福建福清核电有限公司 | Reactor pressure vessel neutron flux measurement channel seal assembly and replacement method thereof |
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