CN201437852U - Top entry type pneumatic ball valve - Google Patents
Top entry type pneumatic ball valve Download PDFInfo
- Publication number
- CN201437852U CN201437852U CN2009201539714U CN200920153971U CN201437852U CN 201437852 U CN201437852 U CN 201437852U CN 2009201539714 U CN2009201539714 U CN 2009201539714U CN 200920153971 U CN200920153971 U CN 200920153971U CN 201437852 U CN201437852 U CN 201437852U
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- valve
- valve body
- pneumatic ball
- spheroid
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Abstract
The utility model belongs to a valve structure, and particularly relates to a top entry type pneumatic ball valve applied to a nuclear power station. The top entry type pneumatic ball valve is characterized in that the valve body adopts an integral forging structure, so that the leakage points are reduced, the technology is advanced, the standing pressure is high and the range of application is wide. When the shock-resistant analysis is carried out to the entire machine, the valve completely conforms to shock-resistant requirements; a valve cap is mounted on the valve body and adopts a top entry type structure, so that the valve mounted on a pipeline can directly receive on-line examination and maintenance, and the internal parts can be taken out for maintenance and replacement without dismounting the valve from a technical pipeline; the waste liquor leading nuclear radiation can not leak to the environment when the valve is maintained; and the valve has the characteristics of good rigidity, shock resistance, excellent radiation resistance, long service life, and convenient installation and maintenance. Therefore, the valve structure is suitable for waste liquor conveying system in the nuclear power station such as a pressurized water reactor.
Description
Technical field
The utility model belongs to a kind of valve mechanism, is specifically related to be applied to a kind of top loaded pneumatic ball valve of nuclear power station.
Background technique
Nuclear power valve is the hydraulic equipment that has a large capacity and a wide range in the nuclear power station, it connect whole nuclear power station 300 surplus a system, be the crucial annex of nuclear plant safety operation.The technical requirements of nuclear power valve also will be considered pollution, ambient temperature, running temperature, ambient humidity, radioactivity, DC electrical source and the voltage functuation of impurity in the medium emphatically, about the technical requirements, safety class or the like of stability down of earthquake and vibration condition except the technical requirements of valve routine.The performance of nuclear power valve drive unit and quality are extremely important and crucial, the reliability that must have safety operation, simultaneously, should be able to bearing temperature, the maximum value that changes of pressure, humidity, irradiation, eaerthquake damage, chemical contamination and institute's power supply source, and must under the situation that the dehydration fault takes place, still can work in the specified period.
At present, normally used traditional soft sealing floating ball valve mostly adopts side-mounted structure as shown in Figure 1, and is inconvenient in the nuclear power station installation and removal; Its valve seat is fixed structure normally, causes taking place easily between valve seat and the spheroid jam or obscission.The quality instability of nuclear power valve, control system reliability are good inadequately, so frequently to the on-bne repair of Fault Control equipment, not only can influence production, influence benefit, and can bring very high risk to system's operation.Some technical merits are lower, the not high phenomenon of q﹠r because domestic nuclear power valve also exists, influence the production domesticization of nuclear power valve to a certain extent, simultaneously owing to limit by the experimental test means of domestic nuclear power valve, and reason such as technology, management, nuclear power valve reliability of products data are few, automatic control level is low, the quality instability of product.Ball valve is used quite extensive in the nuclear power field, but because in the inconsiderate complete and restriction that is subjected to the domestic technique level in exploitation period, deficiencies such as a lot of ball valves exist that structure is huge, poor seismic behavior, online dismounting inconvenience, sealability are unreliable, it uses and development exerts a certain influence.
Summary of the invention
The purpose of this utility model is to provide the top loaded pneumatic ball valve of a kind of superior performance, compact structure, good seal performance, long service life.
Realize the technological scheme of the utility model purpose: a kind of top loaded pneumatic ball valve, comprise the valve body that has horizontal through hole, the central position of horizontal through hole is provided with spheroid in the valve body, the upper end of spheroid is connected with valve rod, the valve rod upper end is provided with connecting sleeve, valve body connects by connecting sleeve and gas load, be provided with valve seat between spheroid and the valve body, described valve body adopts overall structure, the valve body upper end is provided with valve gap, and described valve rod passes and covers at the valve body bonnet, is provided with rear valve base between valve seat and the valve body, be provided with the dish spring between valve seat and the rear valve base, be provided with soft valve seat between spheroid and the valve seat.
Aforesaid a kind of top loaded pneumatic ball valve is between valve rod and the valve body, between valve gap and the valve body, between valve seat and the rear valve base, all adopt the sealing of O type circle between rear valve base and the valve body.
Aforesaid a kind of top loaded pneumatic ball valve, O type circle adopt the fluorine rubber material to make.
Aforesaid a kind of top loaded pneumatic ball valve, valve rod top are provided with and hang nail, are provided with thrust pad between valve rod and the valve gap.
Aforesaid a kind of top loaded pneumatic ball valve, soft valve seat adopt polyetheretherketonematerials materials to make.
Effect of the present utility model is:
1) owing to adopted last dress formula structure, but, valve need not be pulled down from process pipelines, internals can be taken out maintenance and change being contained in inspection of valve direct-on-line and the maintenance on the pipeline.
2) valve body is the solid forging structure, has reduced leakage point, and technology advanced person bears the pressure height, and using scope is wide.When complete machine being carried out the antidetonation analysis, valve meets shockproof requirements fully.
3) all-pass directly designs, and by valve big disturbance takes place for avoiding fluid, produces disorder, increases flow resistance, and whole channel cross-sections keep level and smooth from the valve inlet to the sealing surface, and runner is unimpeded.
4) soft valve seat adopts polyether-ether-ketone (PEEK) material of superior performance, can realize the sealing with metal ball body preferably.
5) the movable valve stand structure that adopts the dish spring to load, this also is the place different with traditional floating ball valve, is in order initial specific pressure to be provided, to be convenient to install, prevent valve seat and problems such as spheroid jam or disengaging, sealing reliably long service life.
6) valve rod leak-proof structure adopts the sealing of O type circle, and O type circle adopts fluorine rubber, and sealing is reliable, satisfies the requirement of valve serviceability temperature.
7) nail is hung in setting at the valve rod top, can make on the valve rod and carry, and compresses retaining pad simultaneously, plays auxiliary seal.
Description of drawings
Fig. 1 is a kind of structural representation of traditional soft sealing floating ball valve;
Fig. 2 is the structural representation of a kind of top loaded pneumatic ball valve provided by the utility model.
Among the figure: 1. valve body; 2. spheroid; 3. soft valve seat; 4. valve seat; 5. rear valve base; 6.O type circle; 7. dish spring; 8. pad; 9. valve rod; 10.O type circle; 11. gas dress; 12. connecting sleeve; 13. hang nail; 14. valve gap; 15.O type circle; 16. thrust pad; 17.O type circle; 18. through hole.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 2, a kind of top loaded pneumatic ball valve, comprise the valve body 1 that has horizontal through hole 18, the central position of horizontal through hole 18 is provided with spheroid 2 in the valve body 1, the upper end of spheroid 2 is connected with valve rod 9, valve rod 9 upper ends are provided with connecting sleeve 12, and valve body 1 is adorned 11 by connecting sleeve 12 and gas and is connected, and are provided with valve seat 4 between spheroid 2 and the valve body 1.Valve body 1 adopts overall structure.Valve body 1 upper end is provided with valve gap 14, and described valve rod 9 passes and covers at valve body 1 bonnet 14.Valve rod 9 tops are provided with hangs nail 13, is provided with thrust pad 16 between valve rod 9 and the valve gap 14.Be provided with rear valve base 5 between valve seat 4 and the valve body 1, be provided with dish spring 7 between valve seat 4 and the rear valve base 5, be provided with soft valve seat 3 between spheroid 2 and the valve seat 4.Between valve rod 9 and the valve body 1, between valve gap 14 and the valve body 1, between valve seat 4 and the rear valve base 5, be respectively equipped with O type circle (10,15,17,6) between rear valve base 5 and the valve body 1 and seal.Valve gap 14 lower ends and valve body 1 point of contact also are provided with pad 8.O type circle adopts the fluorine rubber material to make, and soft valve seat 3 adopts the PEEK material to make, and can effectively satisfy nuclear power station usage requirement and environmental conditions requirement.
The working principle of pneumatic ball valve is by means of pneumatic actuator, apply certain commentaries on classics distance in valve rod 9 upper ends and pass to spheroid 2, open-shut device is a porose spheroid 2, the axis that it is wound perpendicular to passage rotates 90 ℃, the through hole of spheroid then overlaps with valve body 1 channel center or is vertical, has just finished the purpose that standard-sized sheet or complete shut-down open and close passage.
Valve body of the present utility model is an integrated type, and valve gap is installed on the valve body.The waste liquid of valve when maintenance band nuclear radiation can not leak in the environment, the valve good rigidly, and antidetonation, radiation resistance are good, and long service life is convenient for installation and maintenance, is applicable to nuclear power plant's waste liquid transporting systems such as pressurized water reactor.According to design calculation result, the maximum operational torque of valve rod is 42Nm during keying, adopts 90 ° of rotary type gas dresses.Main bearer has been carried out stress intensity calculating, comprised bearers such as valve body, valve gap, middle flange bolt, valve rod, result of calculation is qualified.The analysis of natural vibration frequency of valve: calculate natural frequency of vibration 78Hz＞33Hz, meet the demands.With the equivalent static force method valve dangerous section is carried out the antidetonation analysis, each dangerouse cross-section meets with stresses and all meets the demands.
And valve has been carried out multiple type approval test, all met the demands.1) cold cycle test; 2) heat cycle test; 3) thermal shock test; 4) operating life test; 5) fluid blocking test; 6) vibration degradation testing; 7) dynamic characteristic exploratory test; 8) seismic test; 9) end load test; 10) flow coefficient (flow resistance coefficient) determination test.
Technical order of the present utility model has reached international like product level, and product performance are reliable, novel structure, reasonable, and selection is suitable, belongs to leading domestic product.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.If these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (5)
1. top loaded pneumatic ball valve, comprise the valve body (1) that has horizontal through hole (18), the central position of the interior horizontal through hole of valve body (1) (18) is provided with spheroid (2), the upper end of spheroid (2) is connected with valve rod (9), valve rod (9) upper end is provided with connecting sleeve (12), valve body (1) is connected with gas dress (11) by connecting sleeve (12), be provided with valve seat (4) between spheroid (2) and the valve body (1), it is characterized in that: described valve body (1) adopts overall structure, valve body (1) upper end is provided with valve gap (14), described valve rod (9) passes and covers at valve body (1) bonnet (14), be provided with rear valve base (5) between valve seat (4) and the valve body (1), be provided with dish spring (7) between valve seat (4) and the rear valve base (5), be provided with soft valve seat (3) between spheroid (2) and the valve seat (4).
2. according to the described a kind of top loaded pneumatic ball valve of claim 1, it is characterized in that: between described valve rod (9) and the valve body (1), between valve gap (14) and the valve body (1), between valve seat (4) and the rear valve base (5), all adopt the sealing of O type circle between rear valve base (5) and the valve body (1).
3. according to the described a kind of top loaded pneumatic ball valve of claim 2, it is characterized in that: described O type circle adopts the fluorine rubber material to make.
4. according to the described a kind of top loaded pneumatic ball valve of claim 1, it is characterized in that: described valve rod (9) top is provided with hangs nail (13), is provided with thrust pad (16) between valve rod (9) and the valve gap (14).
5. according to the described a kind of top loaded pneumatic ball valve of claim 1, it is characterized in that: described soft valve seat (3) adopts polyetheretherketonematerials materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201539714U CN201437852U (en) | 2009-05-19 | 2009-05-19 | Top entry type pneumatic ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201539714U CN201437852U (en) | 2009-05-19 | 2009-05-19 | Top entry type pneumatic ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201437852U true CN201437852U (en) | 2010-04-14 |
Family
ID=42399826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201539714U Expired - Lifetime CN201437852U (en) | 2009-05-19 | 2009-05-19 | Top entry type pneumatic ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201437852U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858446A (en) * | 2010-06-13 | 2010-10-13 | 无锡智能自控工程有限公司 | Bi-directional sealed V-shaped regulating ball valve |
| CN102606760A (en) * | 2010-12-29 | 2012-07-25 | 大连大高阀门有限公司 | Nuclear class I electric ball valve |
| CN105257893A (en) * | 2015-11-09 | 2016-01-20 | 五洲阀门有限公司 | High-temperature molten salt dissection ball valve |
| CN106090285A (en) * | 2016-08-12 | 2016-11-09 | 四川省简阳市川力机械制造有限责任公司 | A kind of control stop valve for cryogenic equipment |
-
2009
- 2009-05-19 CN CN2009201539714U patent/CN201437852U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858446A (en) * | 2010-06-13 | 2010-10-13 | 无锡智能自控工程有限公司 | Bi-directional sealed V-shaped regulating ball valve |
| CN102606760A (en) * | 2010-12-29 | 2012-07-25 | 大连大高阀门有限公司 | Nuclear class I electric ball valve |
| CN105257893A (en) * | 2015-11-09 | 2016-01-20 | 五洲阀门有限公司 | High-temperature molten salt dissection ball valve |
| CN106090285A (en) * | 2016-08-12 | 2016-11-09 | 四川省简阳市川力机械制造有限责任公司 | A kind of control stop valve for cryogenic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100414 |
|
| CX01 | Expiry of patent term |