CN100520131C - Micro-flow regulating valve - Google Patents
Micro-flow regulating valve Download PDFInfo
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- CN100520131C CN100520131C CNB2007101079025A CN200710107902A CN100520131C CN 100520131 C CN100520131 C CN 100520131C CN B2007101079025 A CNB2007101079025 A CN B2007101079025A CN 200710107902 A CN200710107902 A CN 200710107902A CN 100520131 C CN100520131 C CN 100520131C
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- flow regulating
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Abstract
The invention discloses a micro-flow regulating valve, comprising a valve body, a valve base, a spool and an actuating mechanism, characterized in that the valve base is an independent element, which is embedded inside a valve base hole on the valve body, a sealing element is provided in an annular gap between the valve base and the valve body, the valve base is provided with a flow passage and a sealing surface. The regulating valve is convenient for rapid replacing and maintaining, which has a good sealing effect.
Description
Technical field
The present invention relates to a kind of modulating valve, is a kind of micro-flow regulating valve specifically.
Background technique
Modulating valve is grouped into by actuator and valve portion, the valve part is by valve seat in valve body, the valve body and spool, and parts such as valve gap, valve rod form, and actuator's main body is a cylinder, and the piston rod of cylinder links to each other by connected element with the valve rod of valve.Utilize source of the gas control cylinder piston action to promote spool and open and close, carry out Flow-rate adjustment.
At present, be used for the micro-flow regulating valve than Small Flow Control of poison, inflammable and explosive volatile and Korrosionsmedium extremely, ubiquity defectives such as volume is big, cost is high, maintenance is inconvenient, leakage rate is big, poor sealing performance.Be embodied in:
(1) valve seat be by on valve body directly the processing sealing surface constitute, when sealing surface washes away by dielectric corrosion or by medium and can not seal the time, must change whole valve body, cause maintenance difficult, the user cost height.
(2) valve seat seals by annular sealing surface with spool, if this one-level sealing is broken down, occurs easily leaking.
(3) adopt packing seal between valve rod and the valve body, occur seal failure in use for some time easily, and cause leakage.
(4) piston rod of cylinder in the actuator, the valve stem part by parts such as support, bolt and nut and valve fixedly is assembled together, complex structure, volume is big.
Summary of the invention
Owing to directly process the high problem of inconvenient maintenance, cost that sealing surface causes on valve body, purpose of the present invention is just in that a kind of novel micro-flow regulating valve is provided, to address the above problem at present micro-flow regulating valve.
The present invention adopts following technical solution: a kind of micro-flow regulating valve, comprise valve body, valve seat, spool, valve rod, valve gap and actuator, described valve seat is an independent component, be inlaid in the valve seat orifice on the valve body, seal element realization sealing between the two is housed in the annular space between valve seat and the valve body, the position of corresponding spool is provided with runner and sealing surface on the valve seat, it is characterized in that: the runner of described valve seat is a step hole, described spool comprises that a conical surface and the outer bore edges of step hole cooperate the sealing of the formation second level, and described spool front end is that aciculiform structure and step hole endoporus edge mate form first order sealing.
Can have a bellows upper end to be weldingly fixed on the described valve rod by link, its lower end and a Socket welding are connected together, and the sleeve pipe lower end is provided with flange and is pushed down by described valve gap, is provided with seal element and seals between the flange of valve gap and sleeve pipe.
Micro-flow regulating valve of the present invention has following beneficial effect:
(1) valve seat is an independently member, only need change valve seat and will whole valve body not change together when valve seat damage, therefore is convenient to quick replacing, maintenance, and has reduced the expense of changing material require.
(2) valve seat and spool adopt secondary seal, have improved sealing effect.
(3) adopted sylphon seal between valve rod and the valve body, good seal performance like this, leakage rate is little.
Part such as jack panel, attaching nut has so not only reduced manufacture cost, and makes the valve mechanism compactness, and volume is little.
Description of drawings
Fig. 1 is the structural representation of micro-flow regulating valve of the present invention.
Fig. 2 is the partial enlarged drawing of I portion among Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments micro-flow regulating valve of the present invention is described further, to help understanding content of the present invention.
As shown in Figure 1, be a kind of micro-flow regulating valve, comprise valve part and actuator.The valve part is made up of the parts such as valve body 1, valve seat 3, spool 27, valve rod 28 and valve gap 6 that have import and export and runner.
In conjunction with illustrated in figures 1 and 2, valve seat 3 is an independent component, is inlaid in the valve seat orifice on the valve body 1, valve seat is housed in the annular space between valve seat 3 and the valve body 1 uses Expanded graphite Composition spacer 2 as seal element.The outer wall of valve seat 3 is provided with in the step hole that the annular flange-like flange is embedded in valve body 1, and the flange-like flange is pressed on valve seat 3 with valve seat with Expanded graphite Composition spacer 2 and tops bar on the step end face in hole.Valve seat 3 is as sealed member, owing to flow-induced corrosion or wash away and cause impaired the making of sealing surface can only change valve seat 3 and get final product during seal failure.
For improving its sealing effect, prevent leakage failure in the using process, ring packing line A, the B that twice cooperatively interact (perhaps adopting sealing surface to strengthen sealing effect) arranged between valve seat 3 and the spool 27, form secondary seal, good seal performance like this, leakage rate is little.As seen from Figure 2, the runner of valve seat 3 is a step hole, and spool 27 comprises that a conical surface cooperates formation second level sealing B with the outer bore edges of valve seat step hole, and the front end of spool 27 is that bore edges forms sealing A in aciculiform structure and the valve seat step hole.The aciculiform structure of this valve core structure conical surface and end, can change the actual internal area of flow between valve seat 3 and the spool 27, be fit to tiny flow quantity and regulate, and secondary seal makes leakage class bring up to VI level (the ANSIB 16.104-1976 standard of the U.S.) by original IV level.
As shown in Figure 1, bellows 29 upper ends are weldingly fixed on the valve rod 28 by link 30, a lower end and a sleeve pipe 4 weld together, sleeve pipe 4 lower ends are provided with flange and are pushed down by valve gap 6, being provided with down between the flange of valve gap 6 and sleeve pipe 4, valve body seals with Expanded graphite composite pad 5, have through hole to communicate with outlet on the valve body on the sleeve pipe, sleeve pipe 4 lower ends are pressed on the flange-like flange of valve seat 3 outer walls.Adopt 29 pairs of valve rods of bellows 28 and valve body 1, valve gap 6 to seal, with respect to adopting filler sealing tighter, prevent that medium from leaking outside.
Actuator partly is mainly a cylinder, be combined into a cylinder barrel by upper cylinder body 25 and lower cylinder body 16, drive link 23 is housed in cylinder barrel, the through hole on the upper cylinder body is passed in drive link 23 upper ends, between upper cylinder body 25 through-hole walls and drive link 23, there is O-ring seals 26 to be embedded on the upper cylinder body 25, realizes sealing between the two.Drive link 23 ends and valve rod 28 are by being threaded, and piston 19 is installed by the boss of bounding means 22 and valve rod, O-ring seals 21 is arranged on the piston 19, add single coil spring lock washer light type 20 between bounding means 22 and the drive link 23, O-ring seals 18 also is housed in piston 19 endoporus is used to realize sealing between piston and the valve rod.Between the top cover of piston 19 tops and upper cylinder body 25 spring 24 is housed.On the spool 27 that valve rod 28 is connected valve part and the drive link 23 of actuator.Valve rod 28 has the function of piston rod again, and piston rod function and valve rod function are integrated in one, and makes valve mechanism become compacter, light and handy.
One pipe joint is arranged on the connecting tube 9, by screw thread bolt 11 is housed on the pipe joint, have pad 10 to seal between the nut of pipe joint end and bolt 11.Pull down the bolt 11 that stops up pipe joint, whether can observe bellows 29 by this pipe joint has damage or leaks appearance, so that in time adopt measure.
Be equipped with valve gap between valve gap 6 and the valve body 1 with Expanded graphite Composition spacer 7, between valve gap 6 and connecting tube 9, be equipped with pad 8.Seal with pad equally between connecting tube 9 and the link 12.
Working principle is: source of the gas enters cylinder by inlet hole, and the promotion piston moves upward and air is discharged by exhaust port, and pressure spring moves upward spool, thereby opens valve; Die, spring reset moves downward spool, throttle down.
Claims (8)
1, a kind of micro-flow regulating valve, comprise valve body, valve seat, spool, valve rod, valve gap and actuator, described valve seat is an independent component, be inlaid in the valve seat orifice on the valve body, seal element realization sealing between the two is housed in the annular space between valve seat and the valve body, the position of corresponding spool is provided with runner and sealing surface on the valve seat, it is characterized in that: the runner of described valve seat is a step hole, described spool comprises that a conical surface and the outer bore edges of step hole cooperate the sealing of the formation second level, and described spool front end is that aciculiform structure and step hole endoporus edge mate form first order sealing.
2, micro-flow regulating valve as claimed in claim 1, it is characterized in that: a bellows upper end is weldingly fixed on the described valve rod by link, its lower end and a Socket welding are connected together, the sleeve pipe lower end is provided with flange and is pushed down by described valve gap, between the flange of valve gap and sleeve pipe, be provided with seal element and seal, have through hole to communicate in the casing flange bottom with outlet on the valve body.
3, micro-flow regulating valve as claimed in claim 2, it is characterized in that: the outer wall of described valve seat is provided with in the step hole that the annular flange-like flange is embedded in described valve body, described sleeve pipe lower end is pressed on the flange-like flange of valve seat outer wall, makes the flange-like flange that the seal element between valve seat and the valve body is pressed on valve seat and tops bar on the step end face in hole.
4, as described micro-flow regulating valve one of in the claim 1 to 3, it is characterized in that: described actuator is a cylinder, and the piston rod of cylinder and described valve rod are one.
5, micro-flow regulating valve as claimed in claim 4, it is characterized in that: described cylinder is combined into a cylinder barrel by upper cylinder body and lower cylinder body, drive link is housed in cylinder barrel, the through hole on the upper cylinder body is passed in the drive link upper end, between upper cylinder body through-hole wall and drive link, there is O-ring seals to be embedded on the upper cylinder body, realizes sealing between the two; Drive link underpart and described valve rod are by being threaded, and piston is installed by the boss of bounding means on the valve rod and valve rod, O-ring seals also is housed in the piston inner hole is used to realize sealing between piston and the valve rod, between the top cover of piston top and upper cylinder body spring is housed.
6, as described micro-flow regulating valve one of in the claim 1 to 3, it is characterized in that: described actuator is a cylinder, its cylinder barrel is combined into by upper cylinder body and lower cylinder body, the lower cylinder body bottom is connected with a tubular link, the junction plane place of link and lower cylinder body is embedded with O-ring seals and is used for sealing, a connecting tube lower end directly is assemblied on the valve gap by screw thread, its upper end directly is assemblied in described link lower end by screw thread, and is adopting seal element to be connected and sealed between connecting tube and the valve gap and between connecting tube and the described link.
7, micro-flow regulating valve as claimed in claim 6 is characterized in that: a pipe joint is arranged on the described connecting tube, by screw thread bolt is housed on the pipe joint, have pad to seal between pipe joint end and the bolt nut.
8, micro-flow regulating valve as claimed in claim 6 is characterized in that: described tubular link upper end is inserted in the lower cylinder body and by locking nut that is contained in the end and the flange that is positioned at the lower cylinder body outside and is fixedly clamped on lower cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101079025A CN100520131C (en) | 2007-05-15 | 2007-05-15 | Micro-flow regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101079025A CN100520131C (en) | 2007-05-15 | 2007-05-15 | Micro-flow regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038037A CN101038037A (en) | 2007-09-19 |
| CN100520131C true CN100520131C (en) | 2009-07-29 |
Family
ID=38889116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101079025A Active CN100520131C (en) | 2007-05-15 | 2007-05-15 | Micro-flow regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100520131C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333163A (en) * | 2015-10-26 | 2016-02-17 | 无锡市圣科不锈钢气动自控阀门厂 | Novel stop valve |
| CN105927781A (en) * | 2015-11-20 | 2016-09-07 | 天津内燃机研究所（天津摩托车技术中心） | Leak-free pneumatic stop valve |
| CN105909803A (en) * | 2016-04-21 | 2016-08-31 | 杭州艾诺流体控制仪表有限公司 | Tapered thread type micro-flow regulating valve |
| CN108628352B (en) * | 2018-04-19 | 2021-07-06 | 兰州空间技术物理研究所 | Solid working medium gasification flow automatic control device |
| CN108930802A (en) * | 2018-09-25 | 2018-12-04 | 上海净有流体科技有限公司 | Sanitation-grade micrometeor intelligent regulating valve |
| CN110220032B (en) * | 2019-07-11 | 2024-06-11 | 江苏佰健环保科技有限公司 | Medium control valve with flow accurately adjusted |
-
2007
- 2007-05-15 CN CNB2007101079025A patent/CN100520131C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101038037A (en) | 2007-09-19 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHONGQING CHUANYI CONTROL VALVE CO., LTD. Free format text: FORMER NAME: CHONGQING CHUANYI NO.11 FACTORY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 400700 Longfeng village, Beibei District, Chongqing Patentee after: Chongqing Chuan Instrument Control Valve Co., Ltd. Address before: 400700 Longfeng village, Beibei District, Chongqing Patentee before: Chongqing Chuanyi No.11 Factory Co., Ltd. |