CN101737558A - Feed water regulating valve - Google Patents
Feed water regulating valve Download PDFInfo
- Publication number
- CN101737558A CN101737558A CN200810202914A CN200810202914A CN101737558A CN 101737558 A CN101737558 A CN 101737558A CN 200810202914 A CN200810202914 A CN 200810202914A CN 200810202914 A CN200810202914 A CN 200810202914A CN 101737558 A CN101737558 A CN 101737558A
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- China
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- valve
- feed
- valve rod
- regulating
- regulating valve
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Abstract
The invention relates to a feed water regulating valve which comprises a valve body, a valve core and a valve seat, wherein the valve core and the valve seat are arranged in the valve body; the valve core is also connected with a valve rod; a labyrinth disc is arranged above the valve seat in the valve body; a flow equalization cover is arranged above the labyrinth disc; the labyrinth disc and the flow equalization cover are annular; and the valve core can pass through the labyrinth disc and the flow equalization cover in a sliding way. In the valve core structure of the invention, a labyrinth type zigzag flow passage structure and a new multi-stage balanced depressurized valve core design are adopted, thereby improving the resistance coefficient of a throttling component, increasing the adjustable amplitude of the resistance coefficient, reducing the flow rate of the flow passage, greatly improving the flow regulating performance of a high differential pressure regulating valve, reducing the vibration and the noise of the regulating valve and prolonging the service life.
Description
Technical field
The present invention relates to power station water supply system technical field, the water yield and pressure that the concrete modulating valve that relates in the water supply system of power station, this modulating valve are mainly regulated boiler guarantee that station boiler is in operation in the normal parameter scope all the time.
Background technique
Feed-regulating valve is installed between feed water pump and the boiler, along with domestic thermoelectricity industry develops towards big unit direction, unit parameter is more and more higher, nominal pressure also improves thereupon, can reach 60mPa, and traditional feed-regulating valve is to belong to multistage orifice-plate type throttling step-down, and its resistance coefficient is 10, can solve the cavitation problem of pressure reduction valve when not high.But in postcritical unit more than the 300MW, because flow velocity is high, make that the problem such as erosion, vibration, noise of valve is more serious, and flow is with the variation increase of stroke, adjusting function also decreases, and significantly reduce because of continuous firing face under high pressure, high temperature, the high flow rate actual life of valve.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of existing feed-regulating valve, and a kind of feed-regulating valve that can work under the situation of big pressure reduction is provided.
In order to address the above problem technological scheme of the present invention is such:
Feed-regulating valve, comprise valve body, be arranged on spool, valve seat in the valve body, described spool also connects a valve rod, it is characterized in that, described valve inner valve seat top is provided with labyrinth disc, the labyrinth disc top is provided with the current-sharing cover, described labyrinth disc, current-sharing cover are annular, and spool and labyrinth disc, current-sharing cover are slidingly matched, and spool can slide and pass labyrinth disc, current-sharing cover.
Described labyrinth disc is provided with the tortuous runner of mazy type.
Described valve body both sides are provided with water intake and water outlet, and described water intake connects the water inlet flow channel of valve inner, and described water outlet connects the outlet passage of valve inner, the above and below of interlaced layout of described water inlet flow channel and outlet passage and valve seat.
Described valve rod is made of lower valve rod and upper valve rod, and lower valve rod is connected with the spool upper end, and lower valve rod connects upper valve rod, upper valve rod connecting bushing.
Described valve body top is provided with valve gap, and the valve gap upper end connects a support, and the support upper end connects a bearing.
Be bolted to connection between described valve gap and the valve body, between valve gap and valve body, be provided with the valve gap packing ring.
Be bolted to connection between described valve gap and the support, valve gap and between between be provided with seal ring.
Be bolted to connection between described support and the bearing.
Described bearing inside is provided with the bearing of support sleeve.
Described internal stent is provided with the threaded bush who is connected with upper valve rod, has outside thread on the described upper valve rod, has internal thread on the described threaded bush, described threaded bush's connecting bushing.
The joint of described upper valve rod and lower valve rod is provided with contiguous block.
When feed-regulating valve of the present invention is worked, drive upper valve rod by the axle sleeve rotation and move up and down, and then further drive lower valve rod, drive spool then and move, thereby adjustment is by the flow size of the medium of valve body.
Beneficial effect, valve core structure of the present invention adopts the novel spool design of the tortuous flow passage structure of mazy type, multistage balance step-down, improve the resistance coefficient of throttling element, increase the degree of amplitude modulation of resistance coefficient, reduce the runner flow velocity, improved the Flow Adjusting Performance of high-differential-pressure regulating valve greatly, reduced modulating valve vibration and noise, increased the service life.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of feed-regulating valve of the present invention;
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1, feed-regulating valve, the bottom has a valve body 1, valve body 1 both sides have intake-outlet 2, intake-outlet communicates with the inlet and outlet channel that is arranged on valve inner, valve body 1 inside has valve seat 4, and described inlet and outlet channel dislocation arranges that promptly inlet and outlet channel lays respectively at the both sides up and down of valve seat 4.Be provided with valve washer 3 between valve seat 4 and the valve body 1.The top of valve seat 4 is provided with labyrinth disc 5, current-sharing cover 7 in the valve body 1, and labyrinth disc 5, current-sharing cover 7 are annular, and ring-shaped inner part is provided with the spool 6 that can slide, and spool 6 connects a lower valve rod 10.
Described labyrinth disc 5 is provided with the tortuous runner of mazy type.
Be connected with valve gap 9 on valve body 1 top, valve gap 9 is connected with valve body 1 by bolt, in order to reach sealing function, is provided with valve gap packing ring 8 at the phase-contact surface place of valve gap 9 and valve body 1, makes it to reach the function of sealing.Described lower valve rod 10 slidably passes valve gap 9.
The top of valve gap 9 is provided with support 12, and support 12 is connected with valve gap 9 by bolt, in order to reach sealing, is provided with long tubular seal ring 11 between support 12 and lower valve rod 10 equally.Sealing circle 11 extends in the valve gap 9 in support always.
Support 12 upper ends connect a bearing 16 by bolt, and bearing 16 is provided with an axle sleeve 18, and axle sleeve 18 connects a upper valve rod 14, and upper valve rod 14 connects lower valve rod 10 by contiguous block 13.In bearing 16, be provided with the bearing 17 that is used for support sleeve 18, and be provided with threaded bush 15, have internal thread in the threaded bush 15, on upper valve rod 14, have outside thread, make upper valve rod 14 to move mutually relative to threaded bush 15 in the upper end of support 12.
Show spool stroke for convenience, also be provided with a pointer on the contiguous block 13, and side sign there are scale, pointer to move the corresponding amount of movement of meeting indication on support 12.
When feed-regulating valve of the present invention is worked, drive upper valve rod by the axle sleeve rotation and move up and down, and then further drive lower valve rod, drive spool then and move, thereby adjustment is by the flow size of the medium of valve body.
Compared with prior art, valve core structure of the present invention adopts the novel spool design of the tortuous flow passage structure of mazy type, multistage balance step-down, improve the resistance coefficient of throttling element, increase the degree of amplitude modulation of resistance coefficient, reduce the runner flow velocity, improved the Flow Adjusting Performance of high-differential-pressure regulating valve greatly, reduced modulating valve vibration and noise, increased the service life.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (11)
1. feed-regulating valve, comprise valve body, be arranged on spool, valve seat in the valve body, described spool also connects a valve rod, it is characterized in that, described valve inner valve seat top is provided with labyrinth disc, the labyrinth disc top is provided with the current-sharing cover, described labyrinth disc, current-sharing cover are annular, and spool and labyrinth disc, current-sharing cover are slidingly matched, and spool can slide and pass labyrinth disc, current-sharing cover.
2. feed-regulating valve according to claim 1 is characterized in that, described labyrinth disc is provided with the tortuous runner of mazy type.
3. feed-regulating valve according to claim 1, it is characterized in that, described valve body both sides are provided with water intake and water outlet, described water intake connects the water inlet flow channel of valve inner, described water outlet connects the outlet passage of valve inner, the above and below of interlaced layout of described water inlet flow channel and outlet passage and valve seat.
4. feed-regulating valve according to claim 1 is characterized in that described valve rod is made of lower valve rod and upper valve rod, and lower valve rod is connected with the spool upper end, and lower valve rod connects upper valve rod, upper valve rod connecting bushing.
5. feed-regulating valve according to claim 4 is characterized in that, described valve body top is provided with valve gap, and the valve gap upper end connects a support, and the support upper end connects a bearing.
6. feed-regulating valve according to claim 5 is characterized in that, is bolted to connection between described valve gap and the valve body, is provided with the valve gap packing ring between valve gap and valve body.
7. feed-regulating valve according to claim 5 is characterized in that, be bolted to connection between described valve gap and the support, valve gap and between be provided with seal ring.
8. feed-regulating valve according to claim 5 is characterized in that, is bolted to connection between described support and the bearing.
9. feed-regulating valve according to claim 5 is characterized in that, described bearing inside is provided with the bearing of support sleeve.
10. feed-regulating valve according to claim 5 is characterized in that described internal stent is provided with the threaded bush who is connected with upper valve rod, has outside thread on the described upper valve rod, has internal thread on the described threaded bush, described threaded bush's connecting bushing.
11. feed-regulating valve according to claim 4 is characterized in that, the joint of described upper valve rod and lower valve rod is provided with contiguous block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202914A CN101737558A (en) | 2008-11-18 | 2008-11-18 | Feed water regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202914A CN101737558A (en) | 2008-11-18 | 2008-11-18 | Feed water regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101737558A true CN101737558A (en) | 2010-06-16 |
Family
ID=42461428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810202914A Pending CN101737558A (en) | 2008-11-18 | 2008-11-18 | Feed water regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737558A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927296A (en) * | 2012-11-10 | 2013-02-13 | 无锡智能自控工程股份有限公司 | Structure of array type flow rate control valve suitable for compressible fluid |
| CN108518513A (en) * | 2018-05-24 | 2018-09-11 | 杭州浙临阀门有限公司 | High temperature and pressure labyrinth adjusting valve |
| CN110375100A (en) * | 2019-08-23 | 2019-10-25 | 开立基业（北京）阀门制造有限公司 | Flow control valve and electric flow control valve |
-
2008
- 2008-11-18 CN CN200810202914A patent/CN101737558A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927296A (en) * | 2012-11-10 | 2013-02-13 | 无锡智能自控工程股份有限公司 | Structure of array type flow rate control valve suitable for compressible fluid |
| CN108518513A (en) * | 2018-05-24 | 2018-09-11 | 杭州浙临阀门有限公司 | High temperature and pressure labyrinth adjusting valve |
| CN110375100A (en) * | 2019-08-23 | 2019-10-25 | 开立基业（北京）阀门制造有限公司 | Flow control valve and electric flow control valve |
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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 |
Open date: 20100616 |