CN101893110A - Top entry inclined pneumatic ball valve - Google Patents
Top entry inclined pneumatic ball valve Download PDFInfo
- Publication number
- CN101893110A CN101893110A CN2009101428716A CN200910142871A CN101893110A CN 101893110 A CN101893110 A CN 101893110A CN 2009101428716 A CN2009101428716 A CN 2009101428716A CN 200910142871 A CN200910142871 A CN 200910142871A CN 101893110 A CN101893110 A CN 101893110A
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- valve
- valve body
- pneumatic ball
- top entry
- rod
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Abstract
The invention belongs to a valve special for a nuclear power plant, and in particular relates to a nuclear two-stage top entry inclined pneumatic ball valve for a pressurized water reactor nuclear power plant. The valve comprises a valve body, wherein a sphere which is vertical to an axial pipeline in the valve body is arranged in the valve body; the sphere is connected with a valve rod; the valve rod passes through a valve cover which covers the valve body; a soft valve seat is arranged between the sphere and the valve body; a valve seat is arranged outside the soft valve seat; and a disc spring is sleeved on the valve rod and positioned between the valve body and the valve cover. The pneumatic ball valve has the advantages that: the valve has a top entry structure so as to facilitate disassembly; the valve body has an integral casting structure so as to ensure earthquake-resistant capability and reduce leakage points; a sealing system at the valve rod with high reliability and a middle cavity has a multiple sealing structure; and a pneumatic actuating mechanism makes the opening and closing of the valve quicker and more flexible.
Description
Technical field
The invention belongs to the extraordinary valve of a kind of nuclear power plant, be specifically related to a kind of pressurized-water reactor nuclear power plant nuclear secondary top loaded pneumatic ball valve that is used for.
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, it is 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 etc. 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.
As everyone knows, nuclear power with safe and reliable be first principle.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 top entry inclined pneumatic ball valve that the purpose of this invention is to provide a kind of superior performance, compact structure, good seal performance.
The present invention realizes like this, a kind of top entry inclined pneumatic ball valve, it comprises valve body, be provided with the spheroid perpendicular to axial pipeline in the valve body in the valve body, spheroid is connected with valve rod, and valve rod passes the valve gap that covers on valve body, between described spheroid and valve body, be provided with soft valve seat, soft valve seat is provided with valve seat outward, is with the butterfly spring on valve rod, and the dish spring is between valve body and valve gap.
Top at valve gap also is provided with gland, and gland is enclosed within on the valve rod, also is provided with pressing plate on the top of gland, and the top of valve rod is connected with coupling band, and coupling band and gas load connect, and the gas dress is fixed on a top of the trellis, and the bottom of support is fixed on the valve gap.
Also be provided with filler between gland and valve gap, the material of filler is a graphite.Between valve gap and valve body, be provided with pad.
The angle of the side of described spheroid and ball centre line is 5 °.
Advantage of the present invention is: what valve adopted is to go up dress formula structure to be convenient to dismounting; Valve body is the cast inblock structure, has guaranteed anti-seismic performance, reduces the leak point; Adopt multi-sealing structure to form the sealing system at high reliability valve rod and lumen place; Use pneumatic actuator and make that the keying of valve is flexible more rapidly.
Description of drawings
Fig. 1 is a kind of top entry inclined pneumatic ball valve schematic representation provided by the present invention.
Among the figure, 1 valve body, 2 soft valve seats, 3 valve seats, 4 spheroids, 5 dish springs, 6 valve gaps, 7 pads, 8 valve rods, 9 fillers, 10 glands, 11 pressing plates, 12 coupling bands, 13 supports, 14 gas dress.
Embodiment
Describe the present invention below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of top entry inclined pneumatic ball valve, it comprises valve body 1, and valve body 1 is the Three way type structure, and the spheroid 4 perpendicular to axial pipeline in the valve body 1 is installed in the valve body 1, and spheroid 4 is connected with valve rod 8, and the angle of the side of spheroid 4 and ball centre line is 5 °.Spheroid 1 be an integral structure with valve rod 8 in the present embodiment, the mode moulding of employing solid forging, and valve rod 8 passes the valve gap 6 that covers on valve body 1, is connected by bolt between valve gap 6 and the valve body 1, is provided with pad 7 between valve gap 6 and valve body 1.Be provided with soft valve seat 2 between spheroid 4 and valve body 1, be provided with valve seat 3 outside the soft valve seat 2, be with butterfly spring 5 on valve rod 8, dish spring 5 is between valve body 4 and valve gap 6.Top at valve gap 6 also is provided with gland 10, and gland 10 is enclosed within on the valve rod 8, also is provided with pressing plate 11 on the top of gland 10, the top of valve rod 8 is connected with coupling band 12, coupling band 12 is adorned 14 with gas and is connected, and gas is adorned 14 and is fixed on support 13 tops, and the bottom of support 13 is fixed on the valve gap 6.Also be provided with filler 9 between gland 10 and valve gap 6, the material of filler 9 is a graphite.
Beneficial effect of the present invention is as follows:
1) because whole valve has adopted last dress formula structure, but to being contained in inspection of valve direct-on-line and the maintenance on the pipeline.Valve need not be pulled down from process pipelines, internals can be taken out maintenance and replacing.
2) valve body is the cast inblock 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) valve seat adopts the PEEK material of superior performance, be PEEK to metallic seal, soft valve seat is provided with eyelet outward, plays and supports and fixation, guarantees effectively sealing.
5) valve rod leak-proof structure adopts packing seal.Filler adopts Expanded graphite, and sealing is reliable, and satisfies the requirement of valve serviceability temperature.
6) valve rod, spheroid, stationary axle one are forged, and have both satisfied the requirement of the anti-ejection of valve rod, and the central position that can guarantee spheroid simultaneously guarantees sealing.
7) 5 ° of oblique spherical structures, ball centre make spheroid can produce additional buoyancy under the medium effect in course of action on the valve flowing channel center, reduce moment of torsion.
8) on valve rod (spheroid), by two groups of dish springs, provide to spheroid under the acting in conjunction of downward power and spheroid self gravitation, provide a seal pressure to valve seat.The dish spring can effectively prevent the fluctuation that spheroid produces in rotation process simultaneously.
The invention provides a kind of dress formula nuclear power ball valve of going up, valve body 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.
Claims (5)
1. top entry inclined pneumatic ball valve, it comprises valve body (1), be provided with spheroid (4) in the valve body (1) perpendicular to axial pipeline in the valve body (1), spheroid (4) is connected with valve rod (8), valve rod (8) passes the valve gap (6) that covers on valve body (1), it is characterized in that: be provided with soft valve seat (2) between described spheroid (4) and valve body (1), the outer valve seat (3) that is provided with of soft valve seat (2), be with butterfly spring (5) on valve rod (8), dish spring (5) is positioned between valve body (4) and the valve gap (6).
2. a kind of top entry inclined pneumatic ball valve as claimed in claim 1, it is characterized in that: also be provided with gland (10) on the top of valve gap (6), gland (10) is enclosed within on the valve rod (8), also be provided with pressing plate (11) on the top of gland (10), the top of valve rod (8) is connected with coupling band (12), coupling band (12) is connected with gas dress (14), and gas dress (14) is fixed on support (13) top, and the bottom of support (13) is fixed on the valve gap (6).
3. a kind of top entry inclined pneumatic ball valve of stating as claim 2, it is characterized in that: also be provided with filler (9) between gland (10) and valve gap (6), the material of filler (9) is a graphite.
4. a kind of top entry inclined pneumatic ball valve as claimed in claim 1 or 2 is characterized in that: be provided with pad (7) between valve gap (6) and valve body (1).
5. a kind of top entry inclined pneumatic ball valve as claimed in claim 1 or 2 is characterized in that: the side of described spheroid (4) and the angle of ball centre line are 5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101428716A CN101893110A (en) | 2009-05-19 | 2009-05-19 | Top entry inclined pneumatic ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101428716A CN101893110A (en) | 2009-05-19 | 2009-05-19 | Top entry inclined pneumatic ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101893110A true CN101893110A (en) | 2010-11-24 |
Family
ID=43102394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101428716A Pending CN101893110A (en) | 2009-05-19 | 2009-05-19 | Top entry inclined pneumatic ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101893110A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606760A (en) * | 2010-12-29 | 2012-07-25 | 大连大高阀门有限公司 | Nuclear class I electric ball valve |
| CN109780252A (en) * | 2019-03-19 | 2019-05-21 | 龙长贵 | High-performance ball valve for coal chemical industry |
| CN112049957A (en) * | 2020-09-03 | 2020-12-08 | 江苏亿阀股份有限公司 | Ultralow-temperature upper-mounted inclined fixed ball valve capable of resisting burning and rapid assembly method thereof |
-
2009
- 2009-05-19 CN CN2009101428716A patent/CN101893110A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606760A (en) * | 2010-12-29 | 2012-07-25 | 大连大高阀门有限公司 | Nuclear class I electric ball valve |
| CN109780252A (en) * | 2019-03-19 | 2019-05-21 | 龙长贵 | High-performance ball valve for coal chemical industry |
| CN112049957A (en) * | 2020-09-03 | 2020-12-08 | 江苏亿阀股份有限公司 | Ultralow-temperature upper-mounted inclined fixed ball valve capable of resisting burning and rapid assembly method thereof |
| CN112049957B (en) * | 2020-09-03 | 2022-04-22 | 江苏亿阀股份有限公司 | Ultralow-temperature upper-mounted inclined fixed ball valve capable of resisting burning and rapid assembly method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101124 |