CN201145049Y - Needle valve sealing structure - Google Patents
Needle valve sealing structure Download PDFInfo
- Publication number
- CN201145049Y CN201145049Y CNU2007203028894U CN200720302889U CN201145049Y CN 201145049 Y CN201145049 Y CN 201145049Y CN U2007203028894 U CNU2007203028894 U CN U2007203028894U CN 200720302889 U CN200720302889 U CN 200720302889U CN 201145049 Y CN201145049 Y CN 201145049Y
- Authority
- CN
- China
- Prior art keywords
- valve
- bonnet
- sealing
- valve rod
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lift Valve (AREA)
Abstract
A needle valve sealing structure comprises a valve body, a valve rod and an upper valve cap. The seal between the valve rod and the valve body is a soft seat seal, and the soft seat is fixed on the lower sealing part of the valve body from the lower end part of the upper valve cap and is in contact with a conical surface of the lower end of the valve rod to produce the seal. The seal between the valve rod and the upper valve cap is formed by alternant combination of at least a first O-shaped sealing ring and at least a retainer ring. The binding part of the upper valve cap and the valve body is a second O-shaped sealing ring. A circular handgrip which is fixed on the valve rod covers the upper end of the upper valve cap; the lower end of the circular handgrip which encloses the upper part of the upper valve cap is in clearance fit with the upper valve cap; when the valve is turned on or off, the lower end of the circular handgrip is never above the top of the upper valve cap all the time. The needle valve sealing structure can well solve the problems of running, puffing, dropping or leaking seals of the prior needle valve.
Description
Technical field
The utility model relates to a kind of needle-valve, relates in particular to the improvement of its sealing configuration.
Background technique
The primary seal of existing needle-valve, the i.e. sealing of valve rod and valve body are to produce sealing by metal to metal.The sealing of this structure is very high to the hardness requirement of valve rod valve point (being the valve rod cone face), and can't satisfy mixed gas and contain the medium needs of abrasive material, and then causes the phenomenon of " run, drip, leak " to produce.In addition, the sealing of bonnet comprises that filler is mostly adopted in the sealing of the connecting part of the sealing of valve rod and bonnet and bonnet and valve body, poor sealing performance, and it is heavy to open and close torsion.
Summary of the invention
For overcoming the defective of existing needle-valve sealing configuration, the utility model provides a kind of needle-valve sealing configuration.The sealing structure can finely solve the problem of the sealing " run, drip, leak " of existing needle-valve existence.
The technical solution that the utility model adopted is: a kind of needle-valve sealing configuration, comprise valve body, valve rod, bonnet, the soft seat that is sealed into of described valve rod and valve body seals, described soft seat is fixed on the lower seal portion of valve body by the lower end part of bonnet, contacts with the conical surface of valve rod lower end to produce sealing.Described soft seat can adopt the sheet nonmetallic material such as nylon 66.
One of further technical solution of the utility model is that the sealing of described valve rod and bonnet is formed by at least 1 the one O RunddichtringO and 1 ring washer alternate combinations at least.The one O RunddichtringO can adopt the fluororubber O-type seal ring, and ring washer can adopt ptfe sheet.
Two of the further technical solution of the utility model is that the connecting part of described bonnet and valve body is sealed by the 2nd O RunddichtringO.The 2nd O RunddichtringO can adopt the fluororubber O-type seal ring.
Three of the further technical solution of the utility model is that the bonnet upper end is with round handgrip, the circle handgrip is fixed on the valve rod, and the lower end of circle handgrip superscribes the top of valve gap, and is movable with bonnet and cooperates, during valve opening and closing, circle handgrip lower end is no more than the top of bonnet all the time.
The utlity model has following beneficial effect: 1 primary seal, the i.e. sealing of valve rod and valve body adopt the soft seat sealing configuration, especially adopt the sheet nonmetallic material, and be wear-resisting, closes functionally, and especially to negative pressure of vacuum, gas medium has good seal action; 2, O RunddichtringO and ring washer combination seal are adopted in the bonnet sealing, good seal performance, and keying is flexible, torsion is light, and high voltage performance is strong, and the O RunddichtringO after the wearing and tearing can be compensated and change; 3, the lower end of justifying handgrip superscribes the top of valve gap, and during valve opening and closing, circle handgrip lower end is no more than the top of bonnet all the time, utilize bundle of circles hand to prevent that directly dust from entering the threaded stem system, thereby prevent that dust from destroying the lubricated and wearing and tearing of valve rod, further improve sealing effect, and need not add other parts, simple in structure.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is a kind of embodiment's of the utility model an overall structure schematic representation.
Among the figure: 1, justify handgrip, 2, jackscrew, 3, valve rod, 4, bonnet, the 5, the one O RunddichtringO, 6, ring washer, the 7, the 2nd O RunddichtringO, 8, valve body, 9, soft seat.
Embodiment
Embodiment as shown in drawings, the high press seal needle-valve of the utility model double density mainly comprise valve body 8,, valve rod 3, bonnet 4 and circle handgrip 1, circle handgrip 1 is actively set on bonnet 4 upper ends, and be fixed on the valve rod 3 with jackscrew 2, slewing circle handgrip 1 drives valve rod 3 and moves up and down, and the lower end of circle handgrip 1 superscribes the top of valve gap 4, and be movable with bonnet and cooperate, during valve opening and closing, circle handgrip 1 lower end is no more than the top of bonnet 4 all the time, utilizes bundle of circles hand directly dustproof.Described valve rod 3 seals with the soft seat that is sealed into of valve body 8, soft seat 9 is fixed on the lower seal portion of valve body 8 by the lower end part of bonnet 4, contact the generation sealing with the conical surface of valve rod 3 lower ends, soft seat adopts the sheet nylon 66 material, utilize the sealed mouth on the soft seat sheet to contact with the valve rod conical surface (being valve pointed cone degree face), realize high pressure sealing, do not have leakage to reach medium.Described valve rod 3 is formed by two the one O RunddichtringOs 5 and two ring washer 6 alternate combinations with the sealing of bonnet 4, described bonnet 4 is sealed by the 2nd O RunddichtringO 7 with the connecting part of valve body 8, ring washer 6 adopts ptfe sheet, and an O RunddichtringO 5 and the 2nd O RunddichtringO 7 adopt the fluororubber O-type seal ring.
Claims (6)
1, a kind of needle-valve sealing configuration, comprise valve body (8), valve rod (3), bonnet (4), it is characterized in that the described valve rod (3) and the soft seat that is sealed into of valve body (8) seal, described soft seat (9) is fixed on the lower seal portion of valve body (8) by the lower end part of bonnet (4), contacts with the conical surface of valve rod (3) lower end to produce sealing.
2, needle-valve sealing configuration according to claim 1 is characterized in that the described valve rod (3) and the sealing of bonnet (4) are formed by at least 1 the one O RunddichtringO (5) and 1 ring washer (6) alternate combinations at least.
3, needle-valve sealing configuration according to claim 2 is characterized in that the described valve rod (3) and the sealing of bonnet (4) are formed by two the one O RunddichtringOs (5) and two ring washers (6) alternate combinations.
4,, it is characterized in that the described bonnet (4) and the connecting part of valve body (8) are sealed by the 2nd O RunddichtringO (7) according to claim 1 or 2 or 3 described needle-valve sealing configurations.
5, according to claim 1 or 2 or 3 described needle-valve sealing configurations, it is characterized in that described bonnet (4) upper end is with round handgrip (1), circle handgrip (1) is fixed on the valve rod (3), and the lower end of circle handgrip (1) superscribes the top of valve gap (4), and is movable with bonnet and cooperates.
6, needle-valve sealing configuration according to claim 4, it is characterized in that described bonnet (4) upper end is with round handgrip (1), circle handgrip (1) is fixed on the valve rod (3), and the lower end of circle handgrip (1) superscribes the top of valve gap (4), and is movable with bonnet and cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203028894U CN201145049Y (en) | 2007-12-11 | 2007-12-11 | Needle valve sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203028894U CN201145049Y (en) | 2007-12-11 | 2007-12-11 | Needle valve sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201145049Y true CN201145049Y (en) | 2008-11-05 |
Family
ID=40081926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203028894U Expired - Fee Related CN201145049Y (en) | 2007-12-11 | 2007-12-11 | Needle valve sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201145049Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671941A (en) * | 2013-12-04 | 2014-03-26 | 镇江新区汇达机电科技有限公司 | Sealing structure for high-pressure injection needle valve orifice |
| CN104676025A (en) * | 2013-12-03 | 2015-06-03 | 黄家军 | Highly sealed needle valve |
| CN107420624A (en) * | 2017-08-21 | 2017-12-01 | 赛洛克流体设备成都有限公司 | A kind of follow-on sampling bottle needle valve |
-
2007
- 2007-12-11 CN CNU2007203028894U patent/CN201145049Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676025A (en) * | 2013-12-03 | 2015-06-03 | 黄家军 | Highly sealed needle valve |
| CN103671941A (en) * | 2013-12-04 | 2014-03-26 | 镇江新区汇达机电科技有限公司 | Sealing structure for high-pressure injection needle valve orifice |
| CN107420624A (en) * | 2017-08-21 | 2017-12-01 | 赛洛克流体设备成都有限公司 | A kind of follow-on sampling bottle needle 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: 20081105 Termination date: 20141211 |
|
| EXPY | Termination of patent right or utility model |