CN2670684Y - Rapid shut-off valves - Google Patents
Rapid shut-off valves Download PDFInfo
- Publication number
- CN2670684Y CN2670684Y CNU2003201286751U CN200320128675U CN2670684Y CN 2670684 Y CN2670684 Y CN 2670684Y CN U2003201286751 U CNU2003201286751 U CN U2003201286751U CN 200320128675 U CN200320128675 U CN 200320128675U CN 2670684 Y CN2670684 Y CN 2670684Y
- Authority
- CN
- China
- Prior art keywords
- valve
- sleeve
- sealing
- valve plug
- plug
- 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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- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model discloses a rapid shut-off valve. The valve body is a straight-way type streamlined integral structure which is split into an upper cavity and a lower cavity. A press cap is arranged on the valve body; the valve body and the press cap are connected with bolts; the structure of the middle sleeve is tubular; a square diversion hole is arranged on the rapid shut-off valve, the lower sealing port of which is a metallic sealing valve port; the upper side of the rapid shut-off valve is sealed with politef packing seal, the upper part of which is successively provided with the press sleeve and the press cap; the upper side and the lower side of the sleeve are sealed through a polytetrafluoro spacer; a valve plug is arranged in the middle of the sleeve; a hard sealing valve port is arranged under the valve plug, and a through hole is arranged in the middle of the valve plug. The upper cavity and the lower cavity of the valve plug are communicated; an actuator is connected with the valve plug through a valve rod; the upper side of the valve rod is sealed with a packing seal, and the valve rod is provided with a pressure flange. The advantages of the rapid shut-off valve are that the cutting speed of the rapid cut-off valve is fast; the sealing performance is good; the operating performance is reliable, and the service performance is favorable.
Description
Technical field
The utility model belongs to the design and the manufacturing technology field of fast shut-off valve.
Background technique
In industrial control, many working condition requirement valves have the fast shut-off performance.Such as the sending in the oxygen system of blast furnace, the cut-off velocity that requires cut-off valve is less than 3 seconds, and sealing will be got well.So break time and sealing are two important indicators of repid cut-off valve.Existing fast shut-off valve arrangement is multiple, the cut-out mode of similar stop valve spool, and resistance is big during cut-out, and to the requirement height of final controlling element, break time is longer.So better cut-out mode is to draw the tube-in-tube structure of sleeve adjusting valve.But existing tube-in-tube structure cut-off valve exists defectives such as processing difficulties, poor sealing.
Summary of the invention
Technological scheme: the purpose of this utility model is that a kind of repid cut-off valve is provided.Have that circulating resistance is little, break time is short, the sealability reliable characteristics.Its technological scheme is:
(1) valve body: body cavity adopts the design of straight-through type streamline.The valve body of this structure makes circulating resistance reduce to minimum, has reduced the pressure loss of pipeline.When the fast shut-off of valve, also help the pressure of buffering pipe in addition, avoid the impact of water hammer sleeve and valve plug.
(2) tube-in-tube structure: the lower seal mouth of sleeve is metallic seal, can resist from the quick closedown of valve plug and the impact that produces.And top employing packing seal, this has been avoided the conventional sleeve modulating valve shortcoming of the hard sealed mouth of twice up and down.Compressing of filler is to act on the gland by bonnet to finish, also can be between gland and bonnet the boost pressure spring, make filler can keep sealing state all the time.
(3) valve plug: valve plug is the open-shut device of repid cut-off valve, and it realizes the quick opening and closing of valve under the drive of final controlling element and valve rod.Its centre has through hole, make valve plug up and down pressure at both sides protect balance all the time, the resistance when reducing the valve plug opening and closing is easy to realize fast shut-off.
The repid cut-off valve of this structure, fluid is by the square hole circulation on opening around the sleeve.No matter be, act on hydrodynamic pressure on the valve plug, can cancel each other all the time and keep balance from the upstream at the opening and closing state.Thereby make the opening and closing resistance minimum of valve plug.Final controlling element only needs less power just can realize quick closedown.One metal hard-sealing can be resisted the impact from valve plug, and is easy to grind, and realizes good sealing effect easily.No matter the soft seal better tightness of last filler is that the opening and closing state can both seal all the time.The advantage of this structure is in a word, and the repid cut-off valve cut-off velocity is fast, good airproof performance, reliable working performance, have good usability.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
1-valve body 2-sleeve 3-stuffing box packing 4-gland 5-gland 6-valve plug 7-sealed mouth
Embodiment
Valve body 1 is a straight-through type streamline monomer structure, is divided into two chambeies up and down.Be gland 4 above the valve body 1, valve body 1 adopts bolt to be connected with valve gap 4.Intermediate sleeve 2 is a tubular construction, has square pod apertures above, and the lower seal mouth 7 of sleeve 2 is the metal hard-sealing valve port, is packing seal 3 above.Sealing material is a teflon, and the pressured lid 4 that compresses of filler compresses filler by gland 5, and the both sides up and down of sleeve 2 are by poly-Tetrafluoro spacer sealing.The centre of sleeve 2 is a valve plug 6.The following of valve plug 6 is the valve port of hard sealing, and the centre has through hole communicates the upper and lower cavity of valve plug 6.Valve plug 6 links to each other with valve rod by a round nut, and this connection belongs to a kind of dynamic connection, makes valve plug 6 not because of the motion disequilibrium of valve rod, influences the sealing of valve plug.Final controlling element drives the open and close that realize valve that move up and down of valve plug 6 by valve rod.Be sealed into packing seal on the valve rod, have differential to compress filler above.
Claims (1)
- Repid cut-off valve, by valve body, valve plug, Sealing and gland are formed, it is characterized in that valve body (1) is a straight-through type streamline monomer structure, be divided into two chambeies up and down, above the valve body (1) gland (4), the two is connected by bolt, intermediate sleeve (2) is a tubular construction, has square pod apertures above, and its lower seal mouth (7) is the metallic seal valve port, be polytetrafluoroethylene packing sealing (3) above, the top of packing seal (3) is followed successively by gland (5) and gland (4), and the both sides up and down of sleeve (2) are by poly-Tetrafluoro spacer sealing, and the centre of sleeve (2) is valve plug (6), it below the valve plug (6) hard sealing valve port, the centre has through hole, and the upper and lower cavity of valve plug (6) is communicated with, and final controlling element connects valve plug (6) through valve rod, be sealed into packing seal on the valve rod, differential is arranged on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201286751U CN2670684Y (en) | 2003-12-20 | 2003-12-20 | Rapid shut-off valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201286751U CN2670684Y (en) | 2003-12-20 | 2003-12-20 | Rapid shut-off valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2670684Y true CN2670684Y (en) | 2005-01-12 |
Family
ID=34477139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201286751U Expired - Fee Related CN2670684Y (en) | 2003-12-20 | 2003-12-20 | Rapid shut-off valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2670684Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867727A (en) * | 2012-12-14 | 2014-06-18 | 中核苏阀科技实业股份有限公司 | Dual rigidity seal sleeve type regulating valve with flexible structure |
| CN104405908A (en) * | 2014-08-30 | 2015-03-11 | 申宝光 | Valve core component of corrugated pipe type double-base sleeve valve |
-
2003
- 2003-12-20 CN CNU2003201286751U patent/CN2670684Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867727A (en) * | 2012-12-14 | 2014-06-18 | 中核苏阀科技实业股份有限公司 | Dual rigidity seal sleeve type regulating valve with flexible structure |
| CN103867727B (en) * | 2012-12-14 | 2016-12-21 | 中核苏阀科技实业股份有限公司 | A kind of two pass hard sealing shroud cartridge type regulation valve of flexible structure |
| CN104405908A (en) * | 2014-08-30 | 2015-03-11 | 申宝光 | Valve core component of corrugated pipe type double-base sleeve valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |