CN201866278U - Valve stem limit device for stop valve with rotary driving device - Google Patents
Valve stem limit device for stop valve with rotary driving device Download PDFInfo
- Publication number
- CN201866278U CN201866278U CN2010205886853U CN201020588685U CN201866278U CN 201866278 U CN201866278 U CN 201866278U CN 2010205886853 U CN2010205886853 U CN 2010205886853U CN 201020588685 U CN201020588685 U CN 201020588685U CN 201866278 U CN201866278 U CN 201866278U
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- Prior art keywords
- valve
- axial keyway
- axial
- key groove
- valve rod
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- Expired - Lifetime
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Abstract
A valve stem limit device for a stop valve with a rotary driving device belongs to the technical field of valves. An axial stem key groove (4) is arranged on the external circle surface of a valve stem (1); an axial hole key groove (5) corresponding to the axial stem key groove (4) in a matched manner is arranged on the inner wall of a central hole (3) of a connection plate (2); limit keys (6) corresponding in a matched manner are fixedly mounted in the axial hole key groove (5) in an interference fit manner; and simultaneously the limit keys (6) can be in clearance fit with the axial stem key groove (4) in the manner of freely sliding in the axial stem key groove (4). The length and the vertical position of the axial stem key groove (4) have to meet the need that the stop valve with the rotary driving device can be opened or closed completely, axial rotation of the valve stem of the stop valve provided with the driving device can be limited so that normal opening or closing is realized, and the valve stem limit device is simple in structure, easy in implementation and reliable in operation.
Description
Technical field
The utility model belongs to valve technology field, relates to a kind of limit stoper of taking back the stop valve valve rod of rotatable drive unit.
Background technique
Because the particularity of stop valve structure, make its without limits its stem shaft to the rotation device, therefore, after installing back rotatable drive unit (hereinafter to be referred as drive unit), when the stiction between its Stem Mut and the valve rod matching thread during greater than the rotation friction of valve rod, valve rod promptly can rotate together and can not rise or descend with Stem Mut, causes valve not open or to close.
Summary of the invention
The technical problem that solves:
A kind of new structure is provided, can limits the axial rotation of stop valve valve rod, make stop valve that drive unit is installed after, can normally open or close.
The technological scheme that adopts:
Take back the limit stoper of the stop valve valve rod of rotatable drive unit, has valve rod, support and land thereof, it is characterized in that: it is as follows to have the key limit structure between the inwall of the center hole of the land that periphery and its passed of valve rod, has the bar axial keyway on the periphery of valve rod, have on the inwall of the center hole of land and the supporting corresponding hole axial keyway of bar axial keyway, other has the positive stop key of supporting correspondence, this key interference fit formula is packed in the axial keyway of hole, simultaneously spacing bond energy in the bar axial keyway, be free to slide with bar axial keyway Spielpassung; The described stop valve energy full open of rotatable drive unit or the needs of contract fully taken back must be satisfied in the length of bar axial keyway and upper and lower position.
Beneficial effect:
The axial rotation of the stop valve valve rod behind the drive unit is installed in spacing bond energy restriction, thereby make valve rod can overcome stiction between itself and the Stem Mut, the stop valve of installing behind the drive unit can normally be opened or close, and simple in structure, easily implement, reliable.
Description of drawings
Fig. 1, general structure schematic representation;
Fig. 2, press the amplification I figure shown in Fig. 1;
Embodiment
Further explanation in detail in conjunction with the accompanying drawings; Among the figure, 7-Stem Mut, 8-valve head, 9-valve body.
As shown in Figure 1, 2, the limit stoper of taking back the stop valve valve rod of rotatable drive unit is, it is as follows to have the key limit structure between the inwall of the center hole 3 of the land that periphery and its passed 2 of valve rod 1, has bar axial keyway 4 on the periphery of valve rod 1, have on the inwall of the center hole 3 of land 2 and bar axial keyway 4 supporting corresponding hole axial keyways 5, other has the positive stop key 6 interference fit formulas of supporting correspondence to be packed in the hole axial keyway 5, simultaneously positive stop key 6 can in bar axial keyway 4, be free to slide with bar axial keyway 4 Spielpassung; The described stop valve energy full open of rotatable drive unit or the needs of contract fully taken back must be satisfied in the length of bar axial keyway 4 and upper and lower position.
The intensity of positive stop key 6 must fully satisfy the axially needs of rotation of restriction valve rod 1.
Described axially, i.e. the axial O-O ' of valve rod 1.
Claims (2)
1. take back the limit stoper of the stop valve valve rod of rotatable drive unit, has valve rod, support and land thereof, it is characterized in that: it is as follows to have the key limit structure between the inwall of the center hole of the land that periphery and its passed of valve rod, has the bar axial keyway on the periphery of valve rod, have on the inwall of the center hole of land and the supporting corresponding hole axial keyway of bar axial keyway, other has the positive stop key of supporting correspondence, this key interference fit formula is packed in the axial keyway of hole, simultaneously spacing bond energy in the bar axial keyway, be free to slide with bar axial keyway Spielpassung; The described stop valve energy full open of rotatable drive unit or the needs of contract fully taken back must be satisfied in the length of bar axial keyway and upper and lower position.
2. the limit stoper of taking back the stop valve valve rod of rotatable drive unit according to claim 1 is characterized in that: positive stop key (6) links together with land (2) spot welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205886853U CN201866278U (en) | 2010-10-28 | 2010-10-28 | Valve stem limit device for stop valve with rotary driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205886853U CN201866278U (en) | 2010-10-28 | 2010-10-28 | Valve stem limit device for stop valve with rotary driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201866278U true CN201866278U (en) | 2011-06-15 |
Family
ID=44137434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205886853U Expired - Lifetime CN201866278U (en) | 2010-10-28 | 2010-10-28 | Valve stem limit device for stop valve with rotary driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201866278U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709085A (en) * | 2012-05-02 | 2012-10-03 | 美的集团有限公司 | Switch structure |
| CN103672082A (en) * | 2012-09-23 | 2014-03-26 | 江苏神通阀门股份有限公司 | Safety block bottom valve for storage and transportation device of liquid dangerous goods |
-
2010
- 2010-10-28 CN CN2010205886853U patent/CN201866278U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709085A (en) * | 2012-05-02 | 2012-10-03 | 美的集团有限公司 | Switch structure |
| CN102709085B (en) * | 2012-05-02 | 2016-04-20 | 美的集团股份有限公司 | A kind of construction of switch |
| CN103672082A (en) * | 2012-09-23 | 2014-03-26 | 江苏神通阀门股份有限公司 | Safety block bottom valve for storage and transportation device of liquid dangerous goods |
| CN103672082B (en) * | 2012-09-23 | 2016-06-08 | 江苏神通阀门股份有限公司 | Liquid hazardous goods accumulating equipment safety blocks bottom valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 102601 Beijing city Daxing District Panggezhuang Town Green Road No. 3 Patentee after: BEIJING VALVE GENERAL FACTORY CO., LTD. Address before: 102601 Beijing city Daxing District Panggezhuang Industrial Zone Green Road No. 3 Patentee before: Beijing Valve General Factory Group Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |