CN2895911Y - Crystallization-proof double-stem stopping valve - Google Patents
Crystallization-proof double-stem stopping valve Download PDFInfo
- Publication number
- CN2895911Y CN2895911Y CN 200620103393 CN200620103393U CN2895911Y CN 2895911 Y CN2895911 Y CN 2895911Y CN 200620103393 CN200620103393 CN 200620103393 CN 200620103393 U CN200620103393 U CN 200620103393U CN 2895911 Y CN2895911 Y CN 2895911Y
- Authority
- CN
- China
- Prior art keywords
- valve
- valve stem
- valve rod
- stem
- connecting sleeve
- 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
Links
Abstract
The utility model relates to a crystallization-proof double-stem stopping valve which comprises a valve body and a valve cap; wherein a valve stem penetrates the valve cap to be in a loose connection with the sealing part, a valve flack is mounted at the lower end of the valve stem, the valve stem is a double-segment stem, the lower end of the upper valve stem is connected with the upper end of the lower valve stem by a connecting sleeve, the connection between the upper valve stem and the connecting sleeve is a rotary clearance fit, and the connection between the lower valve stem and the connecting sleeve is a fixed joint, so as to construct a structure in which the lower valve stem moves linearly along the axial direction of the lower valve stem. When opening or closing the valve of the utility model, the upper valve stem rotates to move up and down while the lower valve stem and the valve flack don't rotate and can only be moved along the axial direction, so as to make the abrasive deformation of the sealing pair, make the fitting of the sealing pair accurate in positioning, make the sealing reliable and prevent leakage of the medium. And if the valve stem is required to be made from special metallic material in a situation such as strongly corrosion, the upper valve stem and the lower valve stem can be make from different materials to make the structure rational, to save material and keep the production cost low.
Description
Technical field: the utility model relates to a kind of stop valve, particularly Oblique Stop Valve.
Background technique: general stop valve makes its lifting by the handwheel rotary valve rod when opening and closing, and then the pulling flap.Because flap and valve rod rotate together, make the secondary abrasion deformation of fitted seal of valve body and flap easily, sealability reduces, and may make valve invalidation under operating modes such as high temperature, high pressure.Generally be provided with the packing layer motive sealing between valve rod and the valve gap, the frequent rotary lifting of valve rod also easily makes motive sealing unreliable, and medium may leak.And when medium was severe corrosive, possible whole piece valve rod need be used more expensive particulate metal production, and the material of usefulness is many, the cost height.
Summary of the invention: at the prior art deficiency, it is a kind of rational in infrastructure that the utility model provides, and reliable sealing is prevented crystallization double stub shaft stop valve.
The utility model comprises valve body and valve gap, valve rod passes the moving contact seal of valve gap, flap is located at the valve rod lower end, valve rod is a two-part, the lower end of upper valve rod is connected by connecting sleeve with the upper end of lower valve rod, and upper valve rod and connecting sleeve are that the gap is rotatably assorted, and lower valve rod then fixes with connecting sleeve, constitute the axial straight line moving structure of lower valve rod.
The utility model is when opening and closing valve, and upper valve rod rotates lifting, and lower valve rod can only be moved axially together with flap, can not rotate, and the sealing pair abrasion deformation is few, and the position cooperates accurately, and sealing is reliable, prevents dielectric leakage.And when requiring valve rod to be particulate metal under situations such as deep-etching, upper and lower valve rod can adopt the different materials manufacturing, and is rational in infrastructure, saves and uses material, and cost is low.
Further specify the utility model below in conjunction with drawings and Examples.
Description of drawings: Fig. 1 is embodiment's a main structure schematic representation;
Fig. 2 is the I portion enlarged view of Fig. 1.
Embodiment: as shown in the figure, the oblique layout of the valve rod of present embodiment is the direct current type structure.Valve body 1 is connected with valve gap 2, and valve rod is a two-part, and lower valve rod 3 passes valve gap 2 by packing layer 7 moving contact seals, and flap 6 is located at lower valve rod 3 lower ends.The upper end of the lower end of upper valve rod 4 and lower valve rod 3 is connected by connecting sleeve 5, and upper valve rod 4 and connecting sleeve 5 be for the gap is rotatably assorted, and 3 of lower valve rods and connecting sleeve 5 fix, and constitute lower valve rod 3 axial straight line moving structures.During use, rotate lifting upper valve rod 4 by handwheel 9, because upper valve rod 4 and connecting sleeve 5 are rotatably assorted for the gap, so lower valve rod 3 can only axially be spurred together with flap 6, can not rotate, so not only the wearing and tearing of the sealing pair of flap 6 and valve body 1 are few, and packing layer 7 in the valve gap 2 and the wearing and tearing of the juxtaposition metamorphose on lower valve rod 3 surfaces are also few, and motive sealing is reliable.
The rising limit position correspondence of the position, lower end surface of the valve gap 2 of present embodiment and flap 6, and valve gap 2 lower end surfaces are smooth surface, constitute anti-crystallization depositional fabric, medium is not easy crystallization deposition and locates in valve gap 2 lower end surfaces like this.And, also can be provided with insulation jacket 8 at the outer surface of valve body 1, keep temperature, the more difficult crystallization of medium by insulation jacket 8.Flap 6 and lower valve rod 3 can be integral connecting structure, produce more conveniently like this, and accuracy of manufacturing is higher, and the concentricity height of flap 6 and lower valve rod 3 can carry out conical surface seal in the direct current type valve, improve the combination property of valve.
Claims (3)
1, a kind of anti-crystallization double stub shaft stop valve, comprise valve body and valve gap, valve rod passes the moving contact seal of valve gap, flap is located at the valve rod lower end, it is characterized by: valve rod is a two-part, and the upper end of the lower end of upper valve rod (4) and lower valve rod (3) is connected by connecting sleeve (5), and upper valve rod (4) and connecting sleeve (5) are rotatably assorted for the gap, lower valve rod (3) then and connecting sleeve (5) fix, constitute axially straight line moving structure of lower valve rod (3).
2, anti-crystallization double stub shaft stop valve according to claim 1 is characterized by: the rising limit position correspondence of the position, lower end surface of valve gap (2) and flap (6), and valve gap (2) lower end surface is smooth surface, constitutes anti-crystallization depositional fabric.
3, anti-crystallization double stub shaft stop valve according to claim 1 and 2, it is characterized by: the outer surface at valve body (1) also is provided with insulation jacket (8), and flap (6) and lower valve rod (3) they are integral connecting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103393 CN2895911Y (en) | 2006-05-01 | 2006-05-01 | Crystallization-proof double-stem stopping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103393 CN2895911Y (en) | 2006-05-01 | 2006-05-01 | Crystallization-proof double-stem stopping valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2895911Y true CN2895911Y (en) | 2007-05-02 |
Family
ID=38065487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620103393 Expired - Fee Related CN2895911Y (en) | 2006-05-01 | 2006-05-01 | Crystallization-proof double-stem stopping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2895911Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916399A (en) * | 2018-07-11 | 2018-11-30 | 九江中船消防设备有限公司 | A kind of high pressure hull valve |
| CN109084028A (en) * | 2018-08-20 | 2018-12-25 | 中国科学院理化技术研究所 | New type low temperature distribution valve arrangement |
-
2006
- 2006-05-01 CN CN 200620103393 patent/CN2895911Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916399A (en) * | 2018-07-11 | 2018-11-30 | 九江中船消防设备有限公司 | A kind of high pressure hull valve |
| CN109084028A (en) * | 2018-08-20 | 2018-12-25 | 中国科学院理化技术研究所 | New type low temperature distribution valve arrangement |
| CN109084028B (en) * | 2018-08-20 | 2021-03-19 | 中国科学院理化技术研究所 | Novel low-temperature air distribution valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 Termination date: 20120501 |