CN208041288U - Lift the valve stem nut drive mechanism of valve - Google Patents
Lift the valve stem nut drive mechanism of valve Download PDFInfo
- Publication number
- CN208041288U CN208041288U CN201820370271.XU CN201820370271U CN208041288U CN 208041288 U CN208041288 U CN 208041288U CN 201820370271 U CN201820370271 U CN 201820370271U CN 208041288 U CN208041288 U CN 208041288U
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- China
- Prior art keywords
- valve stem
- stem nut
- valve
- bearing
- rolling bearing
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- 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.)
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- Rolling Contact Bearings (AREA)
Abstract
The utility model discloses a kind of valve stem nut drive mechanism of lifting valve, trapezoidal thread is machined on valve rod and valve stem nut, valve rod top is cased with handwheel, and handwheel drives valve stem nut rotation, carries out the elevating movement of valve with ovable valve stem by valve stem nut；Set is divided into loose ring and collar there are two rolling bearing to valve stem nut on rolling bearing above and below, and the rolling bearing loose ring of lower part is under, and collar is upper, and the rolling bearing loose ring on top is upper, and collar is under；Boss structure is equipped on valve stem nut；The lower face of boss structure is fitted close with the collar of lower part rolling bearing, and the upper surface of boss structure is fitted close with the collar of top rolling bearing；There is gap between the loose ring part of rolling bearing and bearing.The valve stem nut drive mechanism of the utility model lifting valve can play the role of mistake proofing installation, can play dustproof effect, can provide lubrication to T shape screw-driven pairs, provide an end-play space to bearing, prevent from being killed.
Description
Technical field
The utility model is related to a kind of valve stem nut drive mechanisms of lifting valve.
Background technology
The valve stem nut drive mechanism of traditional lifting valve, frame upper are equipped with bearing and valve stem nut, and bearing is logical
It crosses screw thread bearing gland to fix, bearing is lubricated by injecting grease in lubricating cup.Such structure can not ensure axis first
Whether correct hold installation direction, once mistake installation, will be unable to play correct mistake.Grease only can lubricate bearing can not
T shape screw threads are lubricated, T shape screw-driven pairs are easy to be worn, after bearing gland fixing bearing, bearing axial direction quilt
It compresses, without any gap, is easy to happen extremely phenomenon.
Invention content
The purpose of this utility model is to provide a kind of valve stem nut drive mechanisms of the lifting valve of favorable working performance.
The technical solution of the utility model is：
A kind of valve stem nut drive mechanism of lifting valve, it is characterized in that：Including holder, rolling bearing, lubricating cup, dust-proof
It is machined with trapezoidal thread on circle, valve stem nut, valve rod, handwheel, valve rod and valve stem nut, valve rod top is cased with handwheel, handwheel band
Ovable valve stem nut rotation is carried out the elevating movement of valve by valve stem nut with ovable valve stem；There are two roll for set above and below for valve stem nut
Bearing is divided into loose ring and collar on rolling bearing, and the rolling bearing loose ring of lower part is under, and collar is in upper, the rolling bearing on top
Loose ring is upper, and collar is under；Boss structure, the rolling bearing on top, the rolling bearing difference of lower part are equipped on valve stem nut
It is arranged in the top of the boss structure, lower section；The lower face of boss structure is fitted close with the collar of lower part rolling bearing, convex
The upper surface of platform structure is fitted close with the collar of top rolling bearing；Between having between the loose ring part of rolling bearing and bearing
Gap.
Dustband is installed on holder, dust is prevented to be entered in stent cavity body by holder.
It is provided with cross oiling groove on valve stem nut, by injecting grease, both bearing was lubricated, while grease passes through
Cross recess has entered at valve rod T-type screw thread, is lubricated to T-type screw thread.
Bearing is compressed by bearing gland, and be provided with slot in bearing gland is provided with preset clearance with bearing upper end, ensure that axis
The end-play held, prevents bearing seizure in slot.
The valve stem nut drive mechanism of the utility model lifting valve can play the role of mistake proofing installation, can play dust-proof
Effect can provide lubrication to T shape screw-driven pairs, provide an end-play space to bearing, prevent from being killed.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
Specific implementation mode
A kind of valve stem nut drive mechanism of lifting valve（Fig. 1）, by holder 1, rolling bearing 2, lubricating cup 3, dustband 4,
Valve stem nut 5, valve rod 6, handwheel 7 are composed, and are machined with trapezoidal thread on valve rod 6 and valve stem nut 5,6 top of valve rod is cased with
Handwheel 7, handwheel 7 drive valve stem nut 5 to rotate, and carry out the elevating movement of valve with ovable valve stem 6 by valve stem nut 5.Valve stem nut 5
Upper and lower sleeve is divided into loose ring and collar, under, collar exists the rolling bearing loose ring of lower part there are two rolling bearing 2 on rolling bearing 2
On, the rolling bearing loose ring on top is upper, and collar is under.When valve rod 6 rises, upper bearing plays a major role, when valve rod declines,
Lower bearing plays a major role.Boss structure, the rolling bearing on top, the rolling bearing difference of lower part are equipped on valve stem nut
It is arranged in the top of the boss structure, lower section；The lower face of boss structure is fitted close with the collar of lower part rolling bearing, convex
The upper surface of platform structure is fitted close with the collar of top rolling bearing；There is larger gap between loose ring part and bearing, ensures
The correctness of bearing installation.Once if setup error, bearing will not have corresponding effect, and the keying for increasing valve is turned round
Square, such structure can play the function of mistake proofing installation.Dustband 4 is installed on holder, prevent dust by holder into
Enter into stent cavity body, influences the greasy property of bearing.Cross oiling groove 8 is provided on valve stem nut 5, by injecting grease, both
Bearing is lubricated, while grease has been entered by cross recess at valve rod T-type screw thread, is lubricated T-type screw thread,
Prevent the generation of abrasion.Bearing is compressed by bearing gland, and be provided with slot in bearing gland is provided with preset clearance with bearing upper end,
It ensure that the end-play of bearing, it is therefore prevented that bearing seizure is in slot.
Claims (4)
1. a kind of valve stem nut drive mechanism of lifting valve, it is characterized in that：Including holder, rolling bearing, lubricating cup, dustband,
Trapezoidal thread is machined on valve stem nut, valve rod, handwheel, valve rod and valve stem nut, valve rod top is cased with handwheel, and handwheel drives valve
Stem nut rotates, and carries out the elevating movement of valve with ovable valve stem by valve stem nut；There are two the axis of rolling for set above and below for valve stem nut
It holds, loose ring and collar is divided on rolling bearing, the rolling bearing loose ring of lower part is under, and collar is in upper, the rolling bearing pine on top
Circle is upper, and collar is under；Boss structure is equipped on valve stem nut, the rolling bearing on top, the rolling bearing of lower part are set respectively
It sets in the top of the boss structure, lower section；The lower face of boss structure is fitted close with the collar of lower part rolling bearing, boss
The upper surface of structure is fitted close with the collar of top rolling bearing；There is gap between the loose ring part of rolling bearing and bearing.
2. the valve stem nut drive mechanism of lifting valve according to claim 1, it is characterized in that：It is equipped on holder dust-proof
Circle prevents dust from being entered in stent cavity body by holder.
3. the valve stem nut drive mechanism of lifting valve according to claim 1, it is characterized in that：Ten are provided on valve stem nut
Word oiling groove both lubricated bearing, while grease has entered valve rod T-type spiral shell by cross recess by injecting grease
At line, T-type screw thread is lubricated.
4. the valve stem nut drive mechanism of lifting valve according to claim 1, it is characterized in that：Bearing passes through bearing gland
It compresses, be provided with slot in bearing gland is provided with preset clearance with bearing upper end, ensure that the end-play of bearing, prevents bearing seizure
In slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820370271.XU CN208041288U (en) | 2018-03-19 | 2018-03-19 | Lift the valve stem nut drive mechanism of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820370271.XU CN208041288U (en) | 2018-03-19 | 2018-03-19 | Lift the valve stem nut drive mechanism of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208041288U true CN208041288U (en) | 2018-11-02 |
Family
ID=63947947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820370271.XU Active CN208041288U (en) | 2018-03-19 | 2018-03-19 | Lift the valve stem nut drive mechanism of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208041288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278410A (en) * | 2018-03-19 | 2018-07-13 | 江苏神通阀门股份有限公司 | Lift the valve stem nut drive mechanism of valve |
-
2018
- 2018-03-19 CN CN201820370271.XU patent/CN208041288U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278410A (en) * | 2018-03-19 | 2018-07-13 | 江苏神通阀门股份有限公司 | Lift the valve stem nut drive mechanism of valve |
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