CN215059639U - Pressure reducing valve adaptive to variable working conditions - Google Patents
Pressure reducing valve adaptive to variable working conditions Download PDFInfo
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- CN215059639U CN215059639U CN202120323469.4U CN202120323469U CN215059639U CN 215059639 U CN215059639 U CN 215059639U CN 202120323469 U CN202120323469 U CN 202120323469U CN 215059639 U CN215059639 U CN 215059639U
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Abstract
The utility model discloses a pressure reducing valve adapting to variable working conditions, which relates to the valve field and comprises a valve body and the like, wherein the valve body is fixedly arranged at the lower part of a valve cover, an actuating mechanism is fixedly arranged on the valve cover and used for driving a valve rod, the valve rod penetrates through the valve cover and extends into a sleeve arranged in the valve body, a valve clack assembly is also arranged in the sleeve, and a plurality of annular grooves are arranged on the excircle of the valve clack assembly to be inserted into a guide ring; a valve seat is embedded in the valve body and is respectively in contact sealing with the lower part of the sleeve and the lower part of the valve clack assembly; the lower end of the valve rod is fixedly connected with the valve clack assembly, and the valve clack assembly is driven to move up and down along the inner wall of the sleeve; a plurality of sleeve throttling holes are formed in the throttling surface at the lower part of the sleeve at equal intervals along the length direction of the sleeve; the lower part of the valve clack assembly is provided with a plurality of valve clack throttling holes at equal intervals along the length direction of the valve clack assembly. The utility model realizes two-stage adjustable pressure reduction when the opening of the valve is less than 30 percent, and meets the requirement of high-pressure small-flow working condition; when the opening degree of the valve is more than 30%, one-stage adjustable pressure reduction is realized, and the requirements of low-pressure large-flow working conditions are met.
Description
Technical Field
The utility model relates to a field of valve, concretely relates to adaptation variable working condition's relief pressure valve.
Background
The high-temperature high-pressure reducing valve is a main core valve of a power station system, plays an important role in reducing high-pressure steam to required steam, and is an important corollary device for 'thermoelectric cooling' triple co-production. The traditional high-temperature high-pressure reducing valve can only realize one-time pressure reduction and adjustment when the system mainly has full-stroke adjustment in operation. In addition, the requirements of high-pressure small flow and low-pressure large flow working conditions cannot be met in the actual adjusting process. Therefore, the adjusting precision is poor, the vibration is large, the noise is high, and the requirement of variable working conditions cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, and provide a relief pressure valve that adapts to variable operating mode, have the advantage that the regulation precision is high, the vibration is weak, small in noise.
The purpose of the utility model is accomplished through following technical scheme: the pressure reducing valve suitable for variable working conditions comprises a valve body, a valve seat, a valve clack assembly, a sleeve, a valve cover and an execution structure, wherein the valve body is fixedly arranged at the lower part of the valve cover; a valve seat is embedded in the valve body and is respectively in contact sealing with the lower part of the sleeve and the lower part of the valve clack assembly; the lower end of the valve rod is fixedly connected with the valve clack assembly and is used for driving the valve clack assembly to move up and down along the inner wall of the sleeve; a plurality of sleeve throttling holes are arranged on the throttling surface at the lower part of the sleeve at equal intervals along the length direction of the sleeve, so that primary adjustable pressure reduction of the valve seat and valve clack assembly is realized; the lower part of the valve clack assembly is provided with a plurality of valve clack orifices at equal intervals along the length direction of the valve clack assembly, and secondary adjustable decompression of the valve clack assembly and the sleeve is realized.
As a further technical scheme, the length of the lower opening of the valve clack assembly is 0.3 times of the length of the lower opening of the sleeve.
As a further technical scheme, the valve clack assembly comprises a main valve clack and an auxiliary valve clack arranged in the main valve clack, and a butterfly spring is arranged between the main valve clack and the auxiliary valve clack; the valve rod penetrates through the auxiliary valve clack and is fixedly connected with the main valve clack.
As a further technical scheme, the guide ring is made of antimony-added hard graphite materials.
As a further technical scheme, the executing mechanism is controlled by one of electric, electro-hydraulic and pneumatic.
The utility model has the advantages that:
1. the variable pressure-reducing throttling structure can meet different working conditions of high pressure, large flow, low pressure, large flow and the like, can reduce pressure loss in a low pressure state, and can reduce noise by the porous throttling cover;
2. the valve body of the pressure reducing valve is in a forging type, so that the pressure resistance is strong, the pressure reducing valve is corrosion resistant, the reliability is enhanced, and the service life of the valve is prolonged;
3. a butterfly spring is adopted between the main valve clack and the auxiliary valve clack, so that the valve has the characteristics of short stroke and heavy load, the shaking is reduced, and the safety is high;
4. antimony-added hard graphite is arranged between the valve clack and the sleeve, so that medium leakage between the valve clack and the sleeve is reduced, and a buffer effect between the guides can be achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the valve when closed.
Fig. 3 is a schematic view of the structure when the valve is opened by 30%.
Fig. 4 is a schematic structural view of the valve when the valve is fully opened.
Description of reference numerals: the valve comprises a valve body 1, a valve seat 2, a valve clack assembly 3, a main valve clack 3-1, an auxiliary valve clack 3-2, a sleeve 4, a valve cover 5, an actuating mechanism 6, a guide ring 7, a belleville spring 8, a valve rod 9, a sleeve throttling hole 10 and a valve clack throttling hole 11.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
example (b): as shown in the attached figure 1, the pressure reducing valve suitable for variable working conditions comprises a valve body 1, a valve seat 2, a valve clack assembly 3, a sleeve 4, a valve cover 5 and an execution structure 6, wherein the valve body 1 is fixedly arranged at the lower part of the valve cover 5, the valve cover 5 is fixedly provided with the execution mechanism 6, the execution mechanism 6 is used for connecting a movable valve rod 9, the valve rod 9 penetrates through the valve cover 5 and extends into the sleeve 4 arranged in the valve body 1, the valve clack assembly 3 is also arranged in the sleeve 4, and the excircle of the valve clack assembly 3 is provided with a plurality of annular grooves for placing a guide ring 7 and matching with the inner wall of the sleeve 4 to realize sealing and guiding; a valve seat 2 is embedded in the valve body 1, and the valve seat 2 is respectively in contact sealing with the lower part of the sleeve 4 and the lower part of the valve clack assembly 3; the lower end of the valve rod 9 is fixedly connected with the valve clack assembly 3 and is used for driving the valve clack assembly 3 to move up and down along the inner wall of the sleeve 4; a plurality of sleeve throttling holes 10 are formed in the throttling surface at the lower part of the sleeve 4 at equal intervals along the length direction of the throttling surface, so that primary adjustable pressure reduction of the valve seat 2 and the valve clack assembly 3 is realized; the lower part of the valve clack assembly 3 is provided with a plurality of valve clack orifices 11 at equal intervals along the length direction of the valve clack assembly, and secondary adjustable decompression of the valve clack assembly 3 and the sleeve 4 is realized. The valve clack assembly 3 comprises a main valve clack 3-1 and an auxiliary valve clack 3-2 arranged in the main valve clack 3-1, and a butterfly spring 8 is arranged between the main valve clack 3-1 and the auxiliary valve clack 3-2; the valve rod 9 penetrates through the auxiliary valve clack 3-2 and is fixedly connected with the main valve clack 3-1.
Preferably, the valve flap assembly 3 has a lower opening length that is 0.3 times the lower opening length of the sleeve 4. The guide ring 7 is made of antimony-added hard graphite material. The actuating mechanism 6 is controlled by adopting one of electric, electrohydraulic and pneumatic. The valve flap assembly 3 has a good tuning profile and can be made into linear LN, equal percentage EP% and parabolic equal flow characteristics. The valve seat 2 and the valve clack assembly 3 have good sealing surfaces and good sealing performance.
The utility model discloses a doublestage decompression structure that sleeve orifice and valve clack orifice are constituteed, steam gets into by admission line, and when the valve rod reciprocated, steam realized the decompression through the change of runner area. As shown in fig. 2, when the valve is closed, the valve flap orifice at the bottom of the valve flap is blocked by the valve seat, and the flow rate of the valve is zero. When the valve opening is less than or equal to 30% (i.e. the upward movement stroke of the valve rod 9 is 0-30% of the maximum stroke), one-stage adjustable pressure reduction of the valve seat and the valve clack can be realized, and two-stage adjustable pressure reduction of the valve clack and the sleeve can be realized, and the structural form meets the requirement of a high-pressure small-flow working condition, and is a schematic diagram when the valve opening is equal to 30% as shown in fig. 3. When the opening of the valve is larger than 30%, the valve clack orifice at the bottom of the valve clack leaves the valve seat, no pressure reduction is performed, and the working condition requirement of low pressure and large flow is met, as shown in fig. 4, the valve is schematically shown when the valve is fully opened. The valve clack adopts a main and auxiliary valve clack form, the auxiliary valve clack stroke is enlarged, and when the valve clack is opened in the starting process, the auxiliary valve clack is firstly opened to balance the pressure of the upper high-pressure air inlet cavity and the lower low-pressure air chamber, so that the thrust of the actuating mechanism is reduced. Antimony-added hard graphite is arranged between the valve clack and the sleeve, so that medium leakage between the valve clack and the sleeve is reduced, and a buffer effect between the guides can be achieved.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (4)
1. A pressure reducing valve adapting to variable working conditions is characterized in that: the valve comprises a valve body (1), a valve seat (2), a valve clack assembly (3), a sleeve (4), a valve cover (5) and an actuating mechanism (6), wherein the valve body (1) is fixedly arranged at the lower part of the valve cover (5), the actuating mechanism (6) is fixedly arranged on the valve cover (5), the actuating mechanism (6) is used for connecting a movable valve rod (9), the valve rod (9) penetrates through the valve cover (5) and extends into the sleeve (4) arranged in the valve body (1), the valve clack assembly (3) is also arranged in the sleeve (4), a plurality of annular grooves are formed in the excircle of the valve clack assembly (3) and used for placing a guide ring (7), and the sealing and guiding are realized by matching with the inner wall of the sleeve (4); a valve seat (2) is embedded in the valve body (1), and the valve seat (2) is respectively in contact sealing with the lower part of the sleeve (4) and the lower part of the valve clack assembly (3); the lower end of the valve rod (9) is fixedly connected with the valve clack assembly (3) and is used for driving the valve clack assembly (3) to move up and down along the inner wall of the sleeve (4); a plurality of sleeve throttling holes (10) are formed in the throttling surface at the lower part of the sleeve (4) at equal intervals along the length direction of the throttling surface, so that primary adjustable pressure reduction of the valve seat (2) and the valve clack assembly (3) is realized; the lower part of the valve clack assembly (3) is provided with a plurality of valve clack orifices (11) at equal intervals along the length direction of the valve clack assembly, so that secondary adjustable decompression of the valve clack assembly (3) and the sleeve (4) is realized; the length of the lower opening of the valve clack assembly (3) is 0.3 times of the length of the lower opening of the sleeve (4).
2. The variable-duty pressure relief valve of claim 1, wherein: the valve clack assembly (3) comprises a main valve clack (3-1) and an auxiliary valve clack (3-2) arranged in the main valve clack (3-1), and a butterfly spring (8) is arranged between the main valve clack (3-1) and the auxiliary valve clack (3-2); the valve rod (9) penetrates through the auxiliary valve clack (3-2) and is fixedly connected with the main valve clack (3-1).
3. The variable-duty pressure relief valve of claim 1, wherein: the guide ring (7) is made of a hard graphite material added with antimony.
4. The variable-duty pressure relief valve of claim 1, wherein: the actuating mechanism (6) is controlled by one of electric, electrohydraulic and pneumatic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120323469.4U CN215059639U (en) | 2021-02-04 | 2021-02-04 | Pressure reducing valve adaptive to variable working conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120323469.4U CN215059639U (en) | 2021-02-04 | 2021-02-04 | Pressure reducing valve adaptive to variable working conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215059639U true CN215059639U (en) | 2021-12-07 |
Family
ID=79259085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120323469.4U Active CN215059639U (en) | 2021-02-04 | 2021-02-04 | Pressure reducing valve adaptive to variable working conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215059639U (en) |
-
2021
- 2021-02-04 CN CN202120323469.4U patent/CN215059639U/en active Active
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