CN212131347U - Combined throttling auxiliary type regulating valve - Google Patents
Combined throttling auxiliary type regulating valve Download PDFInfo
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- CN212131347U CN212131347U CN202020214975.5U CN202020214975U CN212131347U CN 212131347 U CN212131347 U CN 212131347U CN 202020214975 U CN202020214975 U CN 202020214975U CN 212131347 U CN212131347 U CN 212131347U
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- throttling
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- clack
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Abstract
The invention relates to a combined throttling pair type regulating valve which comprises a valve body (7), a valve cover (1), a valve seat (6), a valve rod (2), a throttling sleeve (4), a combined valve clack (5) and a bolt (3); the valve body (7) is connected with the valve cover (1) through a bolt (3), the valve cover (1) compresses the throttling sleeve (4) and the valve seat (6), and the combined valve clack (5) reciprocates under the driving of the valve rod (2); the lower part of the combined valve clack (5) is provided with a throttling sleeve (10), the combined valve clack (5) and the throttling sleeve (10) are of an integrated structure, the length H1 of the throttling sleeve (10) is 1/3 of the valve stroke H, a valve rod drives the combined valve clack to reciprocate in a throttling sleeve, the throttling area of the valve is adjusted, single-stage and two-stage throttling decompression is realized, and the throttling sleeve is suitable for the working conditions that the pressure difference and the flow rate are greatly changed.
Description
Technical Field
The invention relates to a combined throttling pair type regulating valve, and belongs to the field of valves for thermal power, nuclear power and the like.
Background
The regulating valve is installed on a steam-water system pipeline of a thermal power unit and a nuclear power unit, and is important equipment for regulating parameters such as medium flow, pressure, temperature and the like.
At present, the regulating valve in the power generation fields of thermal power, nuclear power and the like has the working conditions that the pressure difference change amplitude is large, and the flow also changes greatly along with the pressure difference, sometimes works under the working conditions of small flow and high pressure difference, and sometimes works under the working conditions of large flow and small pressure difference. For the pipeline system with the working condition of small flow and high pressure difference and the working condition of large flow and small pressure difference, a shunt regulation mode is generally adopted, namely a regulating valve is arranged on a main pipeline, a bypass pipeline is additionally arranged, the regulating valve is also arranged on the bypass pipeline, shunt regulation is implemented, and the engineering construction cost is increased.
The invention effectively solves the problems.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a combined throttling auxiliary type regulating valve, which is suitable for the working conditions of large variation of pressure difference and flow rate.
In order to achieve the purpose, the invention provides a combined throttling pair type regulating valve which comprises a valve body, a valve cover, a valve seat, a valve rod, a throttling sleeve, a combined valve clack, a bolt and the like.
The combined throttling pair type regulating valve adopts a combined throttling pair and comprises a throttling sleeve and a combined valve clack, and a valve rod drives the combined valve clack to reciprocate in the throttling sleeve to regulate the flow area of each throttling pair.
The lower part of a combined valve clack of the combined throttling pair type regulating valve is provided with a throttling sleeve of 1/3 stroke length, and under the working condition of low flow and high pressure difference, a medium is subjected to two-stage pressure reduction regulation through the throttling sleeve and the throttling sleeve at the lower part of the combined valve clack; under the working condition of large flow and small pressure difference, the throttling sleeve at the lower part of the combined valve clack is separated from the valve seat, and the medium is subjected to single-stage pressure reduction regulation only through the throttling sleeve.
The invention has the beneficial effects that: the combined throttling auxiliary type regulating valve can effectively adapt to the working conditions of large pressure difference change and large flow change, and can realize multiple purposes.
Drawings
FIG. 1 is a schematic structural view of a combined throttling pair type regulating valve;
FIG. 2 is a schematic structural diagram of a combined throttling pair;
FIG. 3 is a schematic view of the structure of the combined valve flap
In the figure, 1, a valve cover, 2, a valve rod, 3, a bolt, 4, a throttling sleeve, 5, a combined valve clack, 6, a valve seat, 7, a valve body, 8, a valve cavity, 9, a sleeve expansion area, 10, a throttling sleeve and 11, a valve clack expansion area
Detailed Description
In the embodiment shown in fig. 1, the valve cover 1 is connected with the valve body 7 through a bolt, the valve cover 1 presses the throttle sleeve 4, the throttle sleeve 4 presses the valve seat 6 on the valve body 7, and the valve rod 2 drives the combined valve clack 5 to reciprocate in the throttle sleeve 4 to adjust the throttle area.
In the embodiment shown in fig. 2 and 3, a partial stroke throttle sleeve 10 is arranged below the combined valve clack 5 of the combined throttle pair type regulating valve, the throttle sleeve 10 and the combined valve clack 5 are of an integral structure, and the length H1 of the throttle sleeve 10 is 1/3 of the valve stroke H.
When the system is in a working condition of small flow and high pressure difference, the medium is subjected to pressure reduction regulation by the two-stage throttling pair of the throttling sleeve 4 and the throttling sleeve 10 at the lower part of the combined valve clack 5 through the valve cavity 8, namely the medium firstly enters the sleeve expansion area 9 through the throttling sleeve 4 and then enters the valve clack expansion area 11 through the throttling sleeve 10, so that two-stage throttling and pressure reduction are realized; when the system is in the working condition of large flow and small pressure difference, the valve works under large opening degree, the throttling sleeve 10 at the lower part of the combined valve clack 5 is separated from the valve seat 6, and the medium realizes single-stage throttling and pressure reduction only through the throttling sleeve 4.
Claims (1)
1. The utility model provides a combination throttle pair formula governing valve which characterized in that: the valve comprises a valve body (7), a valve cover (1), a valve seat (6), a valve rod (2), a throttling sleeve (4), a combined valve clack (5) and a bolt (3); the valve body (7) is connected with the valve cover (1) through a bolt (3), the valve cover (1) compresses the throttling sleeve (4) and the valve seat (6), and the combined valve clack (5) reciprocates under the driving of the valve rod (2); the lower part of the combined valve clack (5) is provided with a throttling sleeve (10), the combined valve clack (5) and the throttling sleeve (10) are of an integrated structure, and the length H1 of the throttling sleeve (10) is 1/3 of the valve stroke H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020214975.5U CN212131347U (en) | 2020-02-21 | 2020-02-21 | Combined throttling auxiliary type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020214975.5U CN212131347U (en) | 2020-02-21 | 2020-02-21 | Combined throttling auxiliary type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212131347U true CN212131347U (en) | 2020-12-11 |
Family
ID=73677532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020214975.5U Active CN212131347U (en) | 2020-02-21 | 2020-02-21 | Combined throttling auxiliary type regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212131347U (en) |
-
2020
- 2020-02-21 CN CN202020214975.5U patent/CN212131347U/en active Active
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