CN203516772U - Zero-leakage regulating valve - Google Patents
Zero-leakage regulating valve Download PDFInfo
- Publication number
- CN203516772U CN203516772U CN201320590742.5U CN201320590742U CN203516772U CN 203516772 U CN203516772 U CN 203516772U CN 201320590742 U CN201320590742 U CN 201320590742U CN 203516772 U CN203516772 U CN 203516772U
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- valve
- composite
- seat
- zero
- leakage
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Abstract
The utility model relates regulating and controlling valves and discloses a zero-leakage regulating valve which is low in leakage rate, high in positioning accuracy and strict in control. The zero-leakage regulating valve comprises a valve body, a valve rod and a valve deck on the upper portion of the valve body; one end of the valve rod is connected with a valve core used for fixing a curve-type plunger, and the other end of the valve rod penetrates through the valve deck and is connected with an actuator; a composite valve seat is arranged in an inner cavity of the valve body and is in close fit with the valve core; the composite valve set is made of reinforced PTFE materials or PEEK resin materials; the composite valve seat is positioned and fixed through a valve sleeve; the valve deck and the valve body are connected and fixed through a double-end stud and a nut; a packing box and a spring are arranged at the part where the valve deck and the valve rod are connected; the packing box comprises a lower packing, a middle packing, an upper packing and a packing seat. According to the zero-leakage regulating valve, because flexible sealing and rigid sealing are simultaneously carried out when the composite valve seat and the valve core are sealed, scouring caused by media under high pressure can be prevented, and the zero-leakage sealing performance of the valve is guaranteed; besides, the zero-leakage regulating valve can be used on an occasion with middle-high pressure for a long time, thereby better meeting the requirement of an increasingly developed new process for automatic control.
Description
Technical field
The utility model relates to a kind of adjusting control valve, and especially a kind of leakage rate is little, positioning precision is high, control strict zero leakage regulation valve.
Background technique
Pneumatic diaphragm control valve is as the important component part of modulating valve, modulating valve ubiquity flow curve deviation is in the market large, positioning precision is low, flowed fluctuation is serious, the defects such as control accuracy is low, and common metal sealing modulating valve in the market, general leakage class is IV level, the leakage that ubiquity is larger, cannot meet the automatic demand for control of growing low flow rate condition.
Summary of the invention
The shortcoming that the utility model is used for pneumatic diaphragm control valve in prior art, has designed a kind of zero leakage regulation valve.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
Zero leakage regulation valve, comprises the valve gap on valve body, valve rod and valve body top, and one end of valve rod is connected and fixed the spool of curve plug type, and the other end of valve rod connects actuator through valve gap, and body cavity is provided with composite valve seat, and composite valve seat and spool closely cooperate.
As preferably, one end of valve rod is connected and fixed the spool of curve plug type, and the other end of valve rod connects actuator through valve gap.Spool adopts band curve plug type, Flow characteristics has two kinds, equal percentage and straight line, spool is fixedly connected on one end of valve rod, and the other end of valve rod stretches out valve gap by valve pocket pilot hole, is connected on actuator shaft, with moving up and down of movable valve plug, to change the orifice size size between spool and composite valve seat, regulate the rate-of flow flowing out through valve, during the downward complete shut-down of spool, soft, the hard sealing surface of composite valve seat seals simultaneously, guarantees valve zero leakage.
As preferably, composite valve seat is reinforced TFE material valve seat or polyether-ether-ketone resin material valve seat.Composite valve seat is reinforced TFE material valve seat or polyether-ether-ketone resin material valve seat, when spool contacts with composite valve seat, can soft or hard seal simultaneously, and the washing away of medium while preventing high pressure, guarantees valve zero leakage sealing.
As preferably, the joint of composite valve seat and valve body is provided with the first seal ring, and valve pocket and valve body and valve gap joint are provided with the second seal ring, can strengthen sealing.
As preferably, valve gap and valve body are connected and fixed by stud and nut, and valve gap and valve rod joint are provided with stuffing box and spring.Below stuffing box, increase a spring (pretightening force of spring needs to calculate), after filler wearing and tearing, due to the effect of spring, just can again compress filler, make its sealing, extend the life-span of filler.
As preferably, stuffing box comprises lower filler, middle filler, upper filler and Packing seat.Filler has good sealing and compared with friction coefficient, prevents medium leakage, and filler below is provided with Packing seat and plays the effect of supporting filler.
As preferably, in valve gap, stuffing box top is provided with lining and the screw being enclosed within on valve rod.Bushing device entangles valve rod in valve gap, and the leakage that reduces valve with this, reaches seal action.
According to the technical solution of the utility model, zero leakage regulation valve, the valve gap that comprises valve body, valve rod and valve body top, one end of valve rod is connected and fixed the spool of curve plug type, the other end of valve rod connects actuator through valve gap, body cavity is provided with composite valve seat, and composite valve seat and spool closely cooperate.Spool adopts band curve plug type, Flow characteristics has two kinds, equal percentage and straight line, composite valve seat is reinforced TFE material valve seat or polyether-ether-ketone resin material valve seat, spool is fixedly connected on one end of valve rod, the other end of valve rod stretches out valve gap by valve pocket pilot hole, be connected on actuator shaft, with moving up and down of movable valve plug, to change the orifice size size between spool and composite valve seat, regulate the rate-of flow flowing out through valve, during the downward complete shut-down of spool, soft, the hard sealing surface of composite valve seat seals simultaneously, guarantees valve zero leakage.The utility model, soft, the sealing firmly simultaneously of composite valve seat and spool during sealing, the washing away of medium in the time of can preventing high pressure, guarantees valve zero leakage sealing, and can be long-term used in mesohigh occasion, thereby better meet the automatic demand for control of growing new process.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is stuffing box structure schematic diagram in Fig. 1.
The toponym that in accompanying drawing, each number designation refers to is as follows: 1-valve body, the 2-the first seal ring, 3-composite valve seat, 4-spool, 5-valve pocket, the 6-the second seal ring, 7-valve rod, 8-valve gap, 9-stud, 10-nut, 11-spring, 12-Packing seat, 13-lower filler, 14-middle filler, 15-upper filler, 16-lining, 17-screw, 18-stuffing box.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Embodiment 1
Zero leakage regulation valve, as shown in Figure 1, the valve gap 8 that comprises valve body 1, valve rod 7 and valve body 1 top, one end of valve rod 7 is connected and fixed the spool 4 of curve plug type, the other end of valve rod 7 connects actuator through valve gap 8, valve body 23 inner chambers are provided with composite valve seat 3, and composite valve seat 3 closely cooperates with spool 4.Composite valve seat 3 is reinforced TFE material valve seat or polyether-ether-ketone resin material valve seat, composite valve seat 3 is located and is fixed by valve pocket 5, composite valve seat 3 is provided with the first seal ring 2 with the joint of valve body 1, valve pocket 5 is provided with the second seal ring 6 with valve body 1 and valve gap 8 joints, valve gap 8 is connected and fixed by stud 9 and nut 10 with valve body 1, valve gap 8 is provided with stuffing box 18 and spring 11 with valve rod 7 joints, stuffing box 18 comprises lower filler 13, middle filler 14, upper filler 15 and Packing seat 12, in valve gap 8, stuffing box 18 tops are provided with lining 16 and the screw 17 being enclosed within on valve rod 7.
Working procedure: spool 4 is fixedly connected on one end of valve rod 7, the other end of valve rod 7 stretches out valve gap 8 by valve pocket 5 pilot holes, be connected on actuator shaft, with moving up and down of movable valve plug 4, to change the orifice size size between spool 4 and composite valve seat 3, regulate the rate-of flow flowing out through valve, during spool 4 downward complete shut-down, spool 4 seals with soft, the hard sealing surface of composite valve seat 3 simultaneously, guarantees valve zero leakage.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (6)
1. zero leakage regulation valve, the valve gap (8) that comprises valve body (1), valve rod (7) and valve body (1) top, it is characterized in that: one end of valve rod (7) is connected and fixed the spool (4) of curve plug type, the other end of valve rod (7) connects actuator through valve gap (8), valve body (23) inner chamber is provided with composite valve seat (3), and composite valve seat (3) closely cooperates with spool (4).
2. zero leakage regulation valve according to claim 1, is characterized in that: composite valve seat (3) is reinforced TFE material valve seat or polyether-ether-ketone resin material valve seat, and composite valve seat (3) is by valve pocket (5) location and fixing.
3. zero leakage regulation valve according to claim 2, is characterized in that: composite valve seat (3) is provided with the first seal ring (2) with the joint of valve body (1), and valve pocket (5) is provided with the second seal ring (6) with valve body (1) and valve gap (8) joint.
4. zero leakage regulation valve according to claim 1, is characterized in that: valve gap (8) is connected and fixed by stud (9) and nut (10) with valve body (1), and valve gap (8) and valve rod (7) joint are provided with stuffing box (18) and spring (11).
5. zero leakage regulation valve according to claim 4, is characterized in that: stuffing box (18) comprises lower filler (13), middle filler (14), upper filler (15) and Packing seat (12).
6. zero leakage regulation valve according to claim 1, is characterized in that: in valve gap (8), stuffing box (18) top is provided with lining (16) and the screw (17) being enclosed within on valve rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590742.5U CN203516772U (en) | 2013-09-23 | 2013-09-23 | Zero-leakage regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590742.5U CN203516772U (en) | 2013-09-23 | 2013-09-23 | Zero-leakage regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203516772U true CN203516772U (en) | 2014-04-02 |
Family
ID=50375704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320590742.5U Expired - Fee Related CN203516772U (en) | 2013-09-23 | 2013-09-23 | Zero-leakage regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203516772U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110578822A (en) * | 2018-06-08 | 2019-12-17 | 徐德胜 | Valve gate |
-
2013
- 2013-09-23 CN CN201320590742.5U patent/CN203516772U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578822A (en) * | 2018-06-08 | 2019-12-17 | 徐德胜 | Valve gate |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20190923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |