CN202646726U - Axial-flow type multistage decompression anti-cavitation adjusting valve - Google Patents

Axial-flow type multistage decompression anti-cavitation adjusting valve Download PDF

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Publication number
CN202646726U
CN202646726U CN 201220333833 CN201220333833U CN202646726U CN 202646726 U CN202646726 U CN 202646726U CN 201220333833 CN201220333833 CN 201220333833 CN 201220333833 U CN201220333833 U CN 201220333833U CN 202646726 U CN202646726 U CN 202646726U
Authority
CN
China
Prior art keywords
valve
cavitation
spool
valve core
axial
Prior art date
Application number
CN 201220333833
Other languages
Chinese (zh)
Inventor
汪新春
张�杰
施海霞
Original Assignee
江苏神通阀门股份有限公司
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Filing date
Publication date
Application filed by 江苏神通阀门股份有限公司 filed Critical 江苏神通阀门股份有限公司
Priority to CN 201220333833 priority Critical patent/CN202646726U/en
Application granted granted Critical
Publication of CN202646726U publication Critical patent/CN202646726U/en

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Abstract

The utility model provides an axial-flow type multistage decompression anti-cavitation adjusting valve, comprising a valve body, a valve core and a driving shaft. The driving shaft is fixed in the valve body through a filling sleeve, a cushion ring and a lower bearing; the valve core passes through a valve core sleeve and a guide sleeve and is fixed in the valve body through a pressing ring; the valve core is a cascade stage valve core; a rack is arranged on the valve core; a gear is arranged on the driving shaft; and the gear and the rack are mutually engaged for transmission. The axial-flow type multistage decompression anti-cavitation adjusting valve provided by the utility model has the beneficial effects that angle displacement of the driving shaft is converted into linear displacement of the valve core, so that the motion is stable; furthermore, an angle stroke actuating mechanism can be used for driving; the valve mounting height is reduced; and the space is saved. Moreover, a cascade stage valve core structure has a higher circulating capability and a complete anti-cavitation capability, and can be designed into different throttling grades according to pressure differences, so that the brushing damages of fluid on the surface of the valve core can be effectively reduced, and the valve can be designed into an integral type structure and a splitting type structure; and the axial-flow type multistage decompression anti-cavitation adjusting valve is convenient to mount and maintain.

Description

A kind of axial flow multilevel decompression anti-cavitation modulating valve
Technical field
The utility model relates to a kind of valve, particularly relates to a kind of modulating valve for High Pressure Difference control occasion.
Background technique
At present, the High Pressure Difference controlling fileds such as the adjusting of power plant boiler cooling water, Minimum Flowrate of Feed Pump control, continuous blowdown, the adjusting that discharges water, main steam adjusting close, usually adopt multiple step plug or labyrinth structure pressure reduction with classification, with the infringement of avoiding flash distillation, cavitation, cavitation that the valve pipe system is caused.Common multilevel decompression modulating valve adopts the Cascade spool more both at home and abroad, can solve the problem of cavitation that produces under the High Pressure Difference operating mode, but it is by valve rod straight line motion band movable valve plug moving linearly, and action is not steady and installing space is larger; Valve body often adopts the smithwelding structure, and runner turns to suddenly, and flow resistance is large; Valve core housing adopts hot-mounting process, can not dismantle inconvenient maintenance after the assembling again.
The model utility content
In order to overcome the shortcoming that existing straight journey multilevel decompression anti-cavitation modulating valve action is not steady, installing space is large, flow resistance reaches greatly dismounting inconvenience, the utility model provides a kind of axial flow multilevel decompression anti-cavitation modulating valve.
The technological scheme that its technical problem that solves the utility model adopts is a kind of axial flow multilevel decompression anti-cavitation modulating valve, comprise valve body, spool, live axle, live axle is fixed in the valve body by filler cover, gasket ring and lower bearing, spool runs through valve core housing and guide sleeve, be fixed in the valve body by pressure ring, spool is the tandem spool, and spool is provided with tooth bar, live axle is provided with gear, the wheel and rack transmission of intermeshing.
The medium import is set in the valve body, and import is the axisymmetrical flow linear structure.
Spool can design different throttling progression.
Spool face has large breach, and large breach is positioned at the relative 90 degree positions of spool face, and 1 place is set at least.
Can be designed to integrated type and split-type structural.
The beneficial effects of the utility model are as follows:
1, built-in gear bar driven Design effectively is converted into the angular displacement of live axle the straight-line displacement of spool, and stable action can realize gapless driving, and can adopt the angle stroke actuators to drive, and reduces the valve installation height, saves the space.
2, the tandem valve core structure has higher negotiability and complete anti-cavitation ability, and the tandem spool can be designed to according to different pressure reduction different throttling progression, effectively reduces fluid to the erosion damage of spool face.
3, spool face has large breach, is more suitable for dirty medium operating mode, and spool can be not stuck, flexible movements.
4, the axisymmetrical flow linear structure is adopted in the medium import on the valve body, so that medium turns to smoothness, reduces flow resistance, reduces energy loss, has effectively avoided turning to because of runner eddy current, the cavitation of unexpected generation.
5, utilize pressing plate standing valve core retainer plate, dismantle, keep in repair very convenient.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the present embodiment monolithic construction figure
Fig. 2 is the present embodiment split-type structural figure
Among Fig. 1, Fig. 2: 1. valve body; 2. packing seal pad; 3. gasket ring; 4. filler; 5. filler pressing sleeve; 6. filler cover; 7. live axle; 8. guide sleeve; 9. guide sleeve sealing gasket; 10. seal spool ring; 11. valve core housing; 12. spool; 13. valve core housing seal ring; 14. screw; 15. pressure ring; 16. lower bearing; 17. medium import; 18. bolt; 19. main valve body; 20. auxiliary valve body.
Embodiment
As shown in Figure 1, a kind of axial flow multilevel decompression anti-cavitation modulating valve, comprise valve body 1, spool 12, live axle 7, live axle 7 is fixed in the valve body 1 by filler cover 6, gasket ring 3 and lower bearing 16, rear with filler pressing sleeve 5 fixing seals by filling filler 4 between live axle 7 and the filler cover 6, seal by packing seal pad 2 between filler cover 6 and the valve body 1; Spool 12 runs through valve core housing 11 and guide sleeve 8, utilize screw 14 to be fixed in the valve body 1 by pressure ring 15, seal by seal spool ring 10 between spool 12 and the guide sleeve 8, all by 9 sealings of pilot seal pad, valve core housing 11 is realized sealing by valve core housing seal ring 13 and valve body 1 between guide sleeve 8 and valve core housing 11 and the valve body 1; Spool 12 is the tandem spool, and spool 12 is provided with tooth bar, and live axle 7 is provided with gear, the wheel and rack transmission of intermeshing.
During work, medium enters from left end medium import 17, when driving mechanism provides certain moment of torsion to live axle 7, and the transmission of intermeshing of the rack segments on the gear segment on the live axle 7 and the spool 12, the angular displacement of live axle 7 is transformed into the axial direct linear displacement of spool 12, realizes the keying of valve.
When counterclockwise live axle 7 being applied moment, spool 12 moves to opening direction, medium is through the multistage throttle of spool 12, thereby reach the purpose of regulating rate-of flow and pressure, and relative 90 degree positions, spool 12 surperficial many places have large breach, medium is in flow process, constantly change direction, step pressure reducing reduces flow velocity, reaches the purpose that prevents cavitation and cavitation.
When clockwise direction applies moment to live axle 7, spool 12 moves to closing direction, until valve is closed fully, is made of the pressure pocket of a high leak tightness valve body 1, guide sleeve 8, valve core housing 11, spool 12 and pressure ring 15.
As shown in Figure 2, be the split-type structural figure of the present embodiment, split-type structural is that valve body is divided into main valve body 19 and auxiliary valve body 20 two-part, and these two-part are fixing with bolt 18, during maintenance, take valve body apart, takes out valve core housing and gets final product, and is efficient and convenient.

Claims (5)

1. axial flow multilevel decompression anti-cavitation modulating valve, comprise valve body, spool, live axle, live axle is fixed in the valve body by filler cover, gasket ring and lower bearing, spool runs through valve core housing and guide sleeve, be fixed in the valve body by pressure ring, it is characterized in that: described spool is the tandem spool, and spool is provided with tooth bar, described live axle is provided with gear, the wheel and rack transmission of intermeshing.
2. a kind of axial flow multilevel decompression anti-cavitation modulating valve according to claim 1, it is characterized in that: the medium import is set in the described valve body, and described import is the axisymmetrical flow linear structure.
3. a kind of axial flow multilevel decompression anti-cavitation modulating valve according to claim 1, it is characterized in that: described spool can design different throttling progression.
4. according to claim 1 or 3 described a kind of axial flow multilevel decompression anti-cavitation modulating valve, it is characterized in that: described spool face has large breach, and large breach is positioned at the relative 90 degree positions of spool face, and 1 place is set at least.
5. a kind of axial flow multilevel decompression anti-cavitation modulating valve according to claim 1 is characterized in that: can be designed to integrated type and split-type structural.
CN 201220333833 2012-07-11 2012-07-11 Axial-flow type multistage decompression anti-cavitation adjusting valve CN202646726U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220333833 CN202646726U (en) 2012-07-11 2012-07-11 Axial-flow type multistage decompression anti-cavitation adjusting valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220333833 CN202646726U (en) 2012-07-11 2012-07-11 Axial-flow type multistage decompression anti-cavitation adjusting valve

Publications (1)

Publication Number Publication Date
CN202646726U true CN202646726U (en) 2013-01-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220333833 CN202646726U (en) 2012-07-11 2012-07-11 Axial-flow type multistage decompression anti-cavitation adjusting valve

Country Status (1)

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CN (1) CN202646726U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542115A (en) * 2012-07-11 2014-01-29 江苏神通阀门股份有限公司 Axial-flow type multistage depressurization anti-cavitation regulating valve
CN104633134A (en) * 2015-02-10 2015-05-20 无锡智能自控工程股份有限公司 Hydrocracking heat highly-distributing high-pressure regulating angle valve
CN106224560A (en) * 2016-08-29 2016-12-14 约翰斯顿流体科技(无锡)有限公司 A kind of regulation valve being conveniently replaceable rubber ring
CN106523725A (en) * 2016-12-15 2017-03-22 吴忠中创自控阀有限公司 Cascaded type zero-leakage valve interior assembly
CN106958662A (en) * 2017-03-21 2017-07-18 湖州师范学院 A kind of lock-bit ball valve water transfer mechanism

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542115A (en) * 2012-07-11 2014-01-29 江苏神通阀门股份有限公司 Axial-flow type multistage depressurization anti-cavitation regulating valve
CN104633134A (en) * 2015-02-10 2015-05-20 无锡智能自控工程股份有限公司 Hydrocracking heat highly-distributing high-pressure regulating angle valve
CN104633134B (en) * 2015-02-10 2017-01-11 无锡智能自控工程股份有限公司 Hydrocracking heat highly-distributing high-pressure regulating angle valve
CN106224560A (en) * 2016-08-29 2016-12-14 约翰斯顿流体科技(无锡)有限公司 A kind of regulation valve being conveniently replaceable rubber ring
CN106224560B (en) * 2016-08-29 2018-06-12 约翰斯顿流体科技(无锡)有限公司 A kind of regulating valve for being conveniently replaceable rubber ring
CN106523725A (en) * 2016-12-15 2017-03-22 吴忠中创自控阀有限公司 Cascaded type zero-leakage valve interior assembly
CN106523725B (en) * 2016-12-15 2018-12-28 吴忠中创自控阀有限公司 Cascade zero-leakage valve inner assembly
CN106958662A (en) * 2017-03-21 2017-07-18 湖州师范学院 A kind of lock-bit ball valve water transfer mechanism

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