CN2382908Y - Leakless stop valve - Google Patents
Leakless stop valve Download PDFInfo
- Publication number
- CN2382908Y CN2382908Y CN 98249998 CN98249998U CN2382908Y CN 2382908 Y CN2382908 Y CN 2382908Y CN 98249998 CN98249998 CN 98249998 CN 98249998 U CN98249998 U CN 98249998U CN 2382908 Y CN2382908 Y CN 2382908Y
- Authority
- CN
- China
- Prior art keywords
- valve
- spool
- valve rod
- sealing
- pad
- 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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Abstract
The utility model relates to a leakless stop valve. A sealing insulating element is sheathed outside a valve rod in a valve cavity, and the lower end and the upper end of the insulating element are respectively fixedly connected with a valve core and a sealed flange fixedly arranged between a valve body and a valve cover in a sealing way. The sealing insulating element completely separates the controlled fluid medium from the valve rod. All the seal of the valve is static seal with reliability. The utility model is the stop valve without external leakage, and has the advantages of convenient installation and maintenance and reliable operation. The utility model is particularly suitable for the conveying control of the toxic, inflammable, explosive or unusual fluid medium of which the liquid medium pressure is not higher than 20KG.
Description
The utility model relates to valve technology field, particularly is used for the stop valve that poisonous, inflammable and explosive, rare flowing medium is carried control.
The stop valve that is used for the prior art of FLUID TRANSPORTATION control is sealed into motive sealing between its valve rod and the valve gap, i.e. packing seal is adopted in sealing between movement parts and the static element usually.The sealing at this place is place the weakest during stop valve seals everywhere, when the design of its filling-material structure unreasonable, filler selection or install improper, or after the running regular hour, always having flowing medium external leakage more or less herein, is main generation place of chemical plant evaporating, emitting, dripping or leaking of liquid or gas.When the flowing medium that is transferred was poisonous, inflammable and explosive, it leaks also was one of main root that causes factory's major accident generation.Usually adopting in the production practices increases pack length or filler road number, or shortens the working life of filler artificially, increases the replacing number of times of filler, or prevents to be transferred the external leakage of flowing medium by the measures such as maintenance that improve filler device.Though but take which type of measure, and all can not fundamentally solve its external leakage problem, always external leakage is unescapable, external leakage is more or less always arranged.
The purpose of this utility model is to avoid the deficiency of prior art, and a kind of stop valve that can stop to be transferred the flowing medium external leakage fully is provided.Be specially adapted to the conveying control of poisonous, inflammable and explosive or rare flowing medium.
Core concept of the present utility model is that the motive sealing with the valve rod place becomes static seal, in the hope of fundamentally solving the sealing problem of valve.
The purpose of this utility model realizes by taking following technical measures.
Stop valve comprises valve body, valve gap, spool, valve rod and seal isolation member, the sealing that constitutes valve that is complementary of the sealing surface of spool and the sealing surface of seat in the valve body is paid, the relative valve rod of spool is placed in the lower end of valve rod rotationally, can open and close motion up and down under the drive of valve rod in valve pocket.The seal isolation member is nested with on the valve rod within the valve pocket that is positioned at valve body and valve gap formation, and lower end and seal spool are fixedly connected, and the upper end connects with the static element sealing and fixing, and the seal isolation member can stretch along the valve rod direction.
In order better to realize the purpose of this utility model, the utility model has also been taked following technical measures:
Between valve body and valve gap, be provided with and be used for the sealing flange that connects with seal isolation member upper end sealing and fixing.
The seal isolation member is axial telescopic bellows.
Valve rod lower end design has the shaft shoulder head that is complementary with the spool mounting hole, and by the shaft shoulder gland that is complementary with shaft shoulder head and mounting hole spool is placed in the valve rod lower end.
The mounting hole of spool is a blind hole, is mounted with the pad that material is different from the valve rod material in the hole, and the valve rod lower end surface that is connected with the pad contact is a curved end.
The lower end surface of spool is installed with the pad of teflon material, and the end face of pad constitutes the sealing surface of spool.
The utility model has also been taked some other technical measures.
The utility model is compared with the stop valve of prior art has following relatively more outstanding advantage.
1. seal reliable and stablely, can stop controlled fluid medium external leakage fully.Be positioned at valve pocket and be nested with that its lower end and seal spool are fixedly connected outside valve rod, the seal isolation member that the upper end connects with static sealing flange sealing and fixing is the exclusive structural member of the utility model.Its special and cleverly structural design make controlled fluid medium and valve rod completely cut off, everywhere sealing in the valve has all been become static seal, seal very reliably, stopped the external leakage of controlled fluid medium fully.The utility model is a kind of stop valve that does not leak fully, is specially adapted to conveying control poisonous, inflammable and explosive, rare flowing medium.
2. it is reliable that spool opens and closes operational movement.Because the fit of spool and valve rod lower end uniqueness, the shaft shoulder termination that is the assembling blind hole of spool and valve rod lower end is for being rotatably assorted, be assembled together by shaft shoulder gland, and the end face of the shaft shoulder termination of valve rod lower end is designed to the convex end face, in spool assembling blind hole, be provided with the pad that material is different from the valve rod material again.Therefore spool has guaranteed that with this assembly structure of valve rod spool both can rotate relative to valve rod neatly, guaranteed again spool under valve rod drives in valve pocket up and down keying move, can prevent effectively that valve rod and valve core movement from killing, spool turns round very reliable.
3. the component mounting or dismounting that are positioned at valve pocket are convenient.And the sealing flange of seal isolation member phase configuration is fixed between valve body and the valve gap by fastening piece, and this structure had both guaranteed seal isolation member and static element sealed attachment, has guaranteed that again the component mounting or dismounting in the valve pocket are convenient, and the installation and maintenance performance of valve is good.
The stop valve that the utility model disclosed is through the experiment of factory actual motion, and the result proves that its sealing effect of stop valve that the utility model discloses is very good, has solved the evaporating, emitting, dripping or leaking of liquid or gas problem that causes owing to the sealing of valve is bad fully, has improved production environment.The stop valve that the utility model disclosed is specially adapted to pressure medium and is not more than 20 kilograms/cm
2, conveying poisonous, inflammable and explosive or rare flowing medium is controlled.
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is combiners of spool, valve rod, seal isolation member and sealing flange in the accompanying drawing 1.
Provide an embodiment of the present utility model below in conjunction with description of drawings, and the utility model is further described in detail by embodiment.
Not leaking stop valve is made of valve body 1, spool 3, seal isolation member 4, valve rod 5, sealing flange 7, valve gap 11 and filler 12.The lower end surface of spool is installed with the pad 2 that material is a teflon by clamping bolt 19, and the Transverse plane of pad and the sealing surface of seat on the valve body constitute the sealing of stop valve and pay.Spool and valve rod fit together rotationally.Connecting structure as shown in Figure 2.The design of valve rod lower end has shaft shoulder head 17, shaft shoulder end surface is protruding sphere, the inner headed face of the assembling blind hole on shaft shoulder head periphery and the spool is rotatably assorted, and at the bottom of the pilot hole and be mounted with the pad 18 of copper material between the shaft shoulder end surface, rotates freely between valve rod and the spool guaranteeing.Spool and valve rod are assembled together by shaft shoulder gland 16.This assembly structure has guaranteed axial motion synchronously in relative rotation between spool and the valve rod, has guaranteed that promptly spool is opening and closing motion up and down under the drive of valve rod in the valve pocket 6 that valve body 1 and valve gap 11 constitute.But seal isolation member 4 is the bellows of axial stretching, lower end and spool 3 seal weldings, and upper end and sealing flange 7 seal weldings are opened valve rod and controlled fluid media isolated.Sealing flange 7 is installed with between valve flange and bonnet flange by bolt 10 and nut 9.The upper end of bellows also can directly connect with valve body or valve gap.But the place of this connecting mode deficiency is the member in the valve pocket installs inconvenience, is not easy to the maintenance of valve.Valve rod 5 is paid 8 with valve gap 11 by screw thread and is fitted together.Material is the packing cavity that the filler 12 of teflon is positioned at the valve gap upper end, hugs in valve rod by gland 13 and locking nut 14, constitutes the sealing defence line that preparatory second road of the utility model prevents controlled fluid medium external leakage.The 15th, the handle wheel of valve can not be installed together with the valve rod upper end with relatively rotating.
Working principle of the present utility model is as follows.Rotate the handle wheel 15 that is fixedly installed togather with valve rod 5, valve rod rotates under the drive of handle wheel, be placed in valve gap because valve rod pays 8 by screw thread, thereby valve rod not only rotates but also move upward with respect to valve body and valve gap.Again since as the bellows and the spool of insulating element and be fixedly arranged in valve body and valve gap between sealing flange be fixedly connected, spool is placed in rotationally with valve rod, when valve rod moves upward rotationally, spool only moves upward along with valve rod and does not rotate, and the bellows that is fixedly connected with spool is shunk thereupon upwards pressing.At this moment valve is opened, and the controlled fluid MEDIA FLOW is through the valve pocket passage, and bellows is kept apart valve rod and controlled fluid medium fully.The packing seal that is positioned at the valve gap upper end does not play a role.The sealing at this place only just played a role when sylphon seal is lost efficacy.The backward rotation handle wheel, spool moves downward in the drive of valve rod, and bellows trails downwards thereupon.The sealing surface of last spool is pressed to the sealing surface of valve seat, and the sealing of blocking that forms valve is paid, and the passage in the valve body is cut off, and valve is in closed condition.
The utility model is not limited to the described structure of embodiment and forms.
The thought that the utility model disclosed is also applicable to the valve of other types.
Claims (7)
1. one kind does not leak stop valve, comprise valve body, valve gap, spool and valve rod, the sealing surface of spool and the sealing surface of seat in the valve body are complementary, spool is placed on the valve rod, in the valve pocket of valve body and valve gap formation, can open and close motion up and down under the drive of valve rod, it is characterized in that spool is placed in the valve rod lower end rotationally with respect to valve rod, valve rod is positioned at its outer telescopic seal isolation member that controlled fluid medium and valve rod are kept apart that is equipped with of part of valve pocket, insulating element lower end and seal spool are fixedly connected, and the upper end connects with the static element sealing and fixing.
2. the stop valve that do not leak according to claim 1 is characterized in that being provided with between valve body and valve gap and is used for the sealing flange that connects with insulating element upper end sealing and fixing.
3. the stop valve that do not leak according to claim 1 and 2 is characterized in that the seal isolation member is telescopic bellows.
4. non-leakage stopping valve according to claim 3 is characterized in that the design of valve rod lower end has the shaft shoulder head that is complementary with the spool mounting hole, and by the shaft shoulder gland spool is placed in the valve rod lower end.
5. the stop valve that do not leak according to claim 4 is characterized in that being mounted with in the spool mounting hole material pad different with the valve rod material, and the valve rod lower end surface that is connected with the pad contact is a curved end.
6. according to claim 1 or 2 or the 4 or 5 described stop valves that do not leak, it is characterized in that the lower end of spool is installed with the pad that material is a teflon, the end face of pad constitutes the sealing surface of spool.
7. the stop valve that do not leak according to claim 3 is characterized in that the lower end of spool is installed with the pad that material is a teflon, and the end face of pad constitutes the sealing surface of spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98249998 CN2382908Y (en) | 1998-12-30 | 1998-12-30 | Leakless stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98249998 CN2382908Y (en) | 1998-12-30 | 1998-12-30 | Leakless stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382908Y true CN2382908Y (en) | 2000-06-14 |
Family
ID=33994601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98249998 Expired - Fee Related CN2382908Y (en) | 1998-12-30 | 1998-12-30 | Leakless stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382908Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975288A (en) * | 2010-10-19 | 2011-02-16 | 张晓荣 | Pneumatically operated three-way reversing valve |
| CN103016756A (en) * | 2013-01-07 | 2013-04-03 | 李江平 | Throttling stop valve |
| CN103527794A (en) * | 2012-07-04 | 2014-01-22 | 石立军 | Anti-inner-leakage device for stainless steel stop valve |
| CN112197035A (en) * | 2020-11-12 | 2021-01-08 | 沈阳北亚饮品机械有限公司 | Aseptic diaphragm one-way stop valve |
| CN114542968A (en) * | 2020-11-26 | 2022-05-27 | 未势能源科技有限公司 | Cylinder valve for gas cylinder and gas cylinder |
-
1998
- 1998-12-30 CN CN 98249998 patent/CN2382908Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975288A (en) * | 2010-10-19 | 2011-02-16 | 张晓荣 | Pneumatically operated three-way reversing valve |
| CN103527794A (en) * | 2012-07-04 | 2014-01-22 | 石立军 | Anti-inner-leakage device for stainless steel stop valve |
| CN103016756A (en) * | 2013-01-07 | 2013-04-03 | 李江平 | Throttling stop valve |
| CN112197035A (en) * | 2020-11-12 | 2021-01-08 | 沈阳北亚饮品机械有限公司 | Aseptic diaphragm one-way stop valve |
| CN114542968A (en) * | 2020-11-26 | 2022-05-27 | 未势能源科技有限公司 | Cylinder valve for gas cylinder and gas cylinder |
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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 |