CN211010065U - Valve rod nut anti-flying structure - Google Patents
Valve rod nut anti-flying structure Download PDFInfo
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- CN211010065U CN211010065U CN201921209728.XU CN201921209728U CN211010065U CN 211010065 U CN211010065 U CN 211010065U CN 201921209728 U CN201921209728 U CN 201921209728U CN 211010065 U CN211010065 U CN 211010065U
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- nut
- support
- flying
- valve rod
- stem
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Abstract
The utility model discloses a valve rod nut anti-flying structure, which comprises an annular boss arranged at the bottom of a valve rod nut body, and bearings are respectively sleeved at the upper side and the lower side of the annular boss; the valve rod nut body and the bearing are arranged in the support, and the support screw plug is screwed into the upper part of the support and tightly pressed on the bearing on the upper side; the anti-flying nut is screwed and arranged at the upper end of the support, and the valve rod nut body penetrates out of the anti-flying nut. The utility model discloses, increase on the basis of the upside screw in support cock of support and prevent flying the nut, further improve the stability when valve-stem nut moves, and overall structure is simple, easily realizes.
Description
Technical Field
The utility model relates to a valve field, concretely relates to valve-stem nut prevents out-of-flight structure.
Background
The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. The valve rod nut consists of a nut cap and a nut rod; the nut cap is provided with a dustproof sealing groove, the inner peripheral surface of the nut rod is sequentially provided with an upper annular groove and a lower annular groove, and the outer peripheral surface of the nut rod is provided with an annular groove. The valve rod nut has certain strength and compressive resistance, and because the valve rod nut is in the process of valve operation, the force of the valve rod shaft is directly given to the valve rod nut. The valve stem nut and the valve stem rotate along with the threads, and the friction coefficient of the valve stem nut is small. So that seizure or rusting can be prevented. The existing valve has the following problems:
(1) due to field operation, the actual pressure of the valve is possibly greater than the design pressure of the valve, so that the thread strength of the support screw plug is insufficient, and the valve rod nut flies out to cause safety accidents;
(2) the bracket screw plug corrodes in the air, which affects the strength of the screw thread.
In view of the above, there is a great need for an improved valve that prevents the stem nut from flying out of the valve during operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that current valve-stem nut flies out because of the operation.
In order to solve the technical problem, the utility model provides an adopted technical scheme is to provide a valve-stem nut prevents flying out structure, include:
the bottom of the valve rod nut body is provided with an annular boss, and bearings are respectively sleeved on the upper side and the lower side of the annular boss;
the valve rod nut body and the bearing are arranged in the support, and a support plug screw is screwed into the upper part of the support and is tightly pressed on the bearing on the upper side;
the anti-flying nut is screwed and arranged at the upper end of the support, and the valve rod nut body penetrates out of the anti-flying nut.
In the scheme, the peripheral surface of the support is provided with a positioning groove, a screw is transversely screwed into the anti-flying nut and abuts against the inside of the positioning groove, the screw is provided with a positioning nut for positioning, and the positioning nut abuts against the peripheral surface of the anti-flying nut.
In the above scheme, the support is of a cylindrical structure, a first boss and a second boss are arranged inside the support, the bearing is arranged on the lower side of the support and is arranged on the first boss, and the bearing is abutted against the inner wall of the second boss.
In the above aspect, the flying nut includes:
the cover plate is provided with a through hole for the valve rod nut body to penetrate out, and the cover plate is pressed on the support and the support screw plug;
and a side plate formed by extending the periphery of the cover plate downwards, wherein one side of the side plate is provided with a screw hole for the screw to pass through.
In the above scheme, a gap exists between the annular boss and the inner wall of the bracket, and an oil chamber is formed between the two bearings, the annular boss and the inner wall of the bracket.
In the above scheme, the valve rod nut body is of a hollow structure, and the valve rod is arranged inside the valve rod nut body.
In the above scheme, the inner side of the valve rod nut body is provided with the trapezoidal thread matched with the valve rod.
In the above scheme, a pressure filling oil cup is arranged on the side surface of the support, and the pressure filling oil cup is correspondingly arranged on one side of the oil cavity.
In the above scheme, the bearing is a plane thrust ball bearing.
Compared with the prior art, the utility model discloses increase on the basis of the upside screw in support cock of support and prevent flying the nut, further improve the stability when valve-stem nut moves, and overall structure is simple, easily realizes.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a partially enlarged view of fig. 3.
Detailed Description
The utility model provides a valve rod nut prevents out structure can prevent the phenomenon of valve rod nut departure in valve operation process. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in FIGS. 1-4, the utility model provides a valve-stem nut prevents flying out structure includes valve-stem nut body 10, bearing 11, support 20 and prevents flying nut 30.
An annular boss 12 is arranged at the bottom of the valve rod nut body 10, and bearings 11 are respectively sleeved on the upper side and the lower side of the annular boss 12. During installation, the bearing 11 needs to be coated with grease to reduce friction.
The valve rod nut body 10 and the bearing 11 are arranged in the support 20, the upper end of the support 20 is screwed into the support plug screw 21 and is pressed on the bearing 11 on the upper side, and then the valve rod nut body 10 is fixed, and the valve rod nut body 10 is prevented from flying out when the valve operates. The material of the bracket screw plug 21 is changed from 25-grade steel to 45-grade steel, so that the bracket screw plug is firmer, the tensile strength of the material is improved to 600MPa from 450MPa, and the yield strength is improved to 355MPa from 275 MPa.
The anti-flying nut 30 is screwed on the upper side of the bracket 20, and the valve rod nut body 10 penetrates through the anti-flying nut 30. The flying prevention nut 30 prevents the stem nut body 10 from flying out during operation due to the damage of the equipment, and the operating stem nut body 10 does not fly out because the stem nut body 10 has the annular projection 12 at the bottom, which corresponds to a stopper. The flying-preventing nut 30 is made of 45-grade steel.
The outer peripheral surface of the bracket 20 is provided with a positioning groove 24, the screw 40 is transversely screwed into the anti-flying nut 30 and abuts against the positioning groove 24, the screw 40 is provided with a positioning nut 41 for positioning, and the positioning nut 41 abuts against the outer peripheral surface of the anti-flying nut 30. The bracket 20 and the flying nut 30 are fixed by the screw 40, and the positioning nut 41 is installed to prevent the flying nut 30 and the bracket 20 from being loosened.
The bracket 20 is of a cylindrical structure, a first boss 25 and a second boss 26 are arranged in the bracket, the bearing 11 on the lower side is arranged on the first boss 25, and the bearing 11 on the upper side is abutted against the inner wall of the second boss 26. The first and second bosses 25, 26 are used to position the bearing 11.
The anti-flying nut 30 includes a cover plate 31 having a through hole 32 on the upper side thereof for the stem nut body 10 to pass through, the cover plate being press-fitted to the bracket 20 and the bracket plug 21, a side plate 33 formed by extending the outer periphery of the cover plate 31 downward, and a screw hole 34 on one side thereof for the screw 40 to pass through. The side plate 33 is screwed on the outer side surface of the support 20, the anti-flying nut 30 is additionally arranged on the basis of the support screw plug 21, the safety is improved, the valve rod nut body 10 is prevented from flying out due to accidental damage of the support screw plug 21, when the valve is not used, the valve can be detached for maintenance or replacement, and the safety is further improved.
The inner side of the bracket 20 is provided with an internal thread 22 which is screwed with the bracket screw plug 21, and the number of turns of the internal thread 22 and the bracket screw plug 21 is increased, so that the bracket screw plug 21 is not easy to fall off. The outer side of the bracket 20 is provided with an external thread 23 which is screwed with the flying-preventing nut 30. Molybdenum disulfide is coated on the internal thread 22 and the external thread 23 to serve as a lubricant, so that the installation is convenient, and thread seizure is prevented. The thread precision is checked by a go gauge and a no-go gauge after the internal thread 22 and the external thread 23 of the bracket 20 and the thread of the bracket screw plug 21 are processed, other dimensional precision is detected by a vernier caliper, and the part processing is accurate.
A gap exists between the annular boss 12 and the inner wall of the bracket 20, and an oil chamber 27 is formed between the bearing 11, the annular boss 12 and the inner wall of the bracket 20. And therefore does not interfere with the rotation of the stem nut body 10 during operation.
The valve rod nut body 10 is of a hollow structure, and a valve rod 13 is arranged inside the valve rod nut body. The inner side of the valve rod nut body 10 is provided with trapezoidal threads 14 matched with the valve rod 13, and the precision of the trapezoidal threads 14 is checked by a go gauge and a no-go gauge. During operation of the valve, the valve stem 13 is moved up and down by rotating about the acme thread 14.
The side surface of the bracket 20 is provided with a pressure filling oil cup 50, the pressure filling oil cup 50 is correspondingly arranged on one side of the oil chamber 27, and the pressure filling oil cup 50 is a press-fit type pressure filling oil cup.
The bearing 11 is a plane thrust ball bearing, and the plane thrust ball bearing 11 is used, so that the performance of the bearing 11 is improved, and the bearing is more durable and has long service life.
The utility model discloses an installation method as follows:
(1) applying grease to the bearing 11;
(2) simultaneously sleeving the valve rod nut body 10 with the sleeve 11;
(3) putting the valve rod nut body 10 sleeved with the bearing 11 into the bracket 20;
(4) coating molybdenum disulfide on the internal thread 22 of the bracket 20;
(5) screwing the bracket screw plug 21 into the bracket 20 by using a tool special for pre-tightening the bracket screw plug 21;
(6) adjusting the fit clearance between the support screw plug 21 and the bearing 11 to enable the valve rod nut body 10 to freely rotate in the support 20;
(7) coating molybdenum disulfide on the external thread 23 of the bracket 20;
(8) screwing the flying-prevention nut 30 into the bracket 20;
(9) after the flying-preventing screw cap 30 is screwed into the bracket 20, a screw hole 34 with the diameter of 8mm is drilled on the side edge, and the bracket 20 is drilled through to form a positioning groove 24;
(10) screwing the screw 40 into the screw hole 34;
(11) the set nut 41 is screwed onto the screw 40 by a wrench to prevent the screw 40 from backing out.
The utility model discloses increase on the basis of the upside screw in support cock of support and prevent flying the nut, further improve the stability when valve-stem nut moves, and overall structure is simple, easily realizes.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.
Claims (9)
1. The utility model provides a stem nut prevents out of structure which characterized in that includes:
the bottom of the valve rod nut body is provided with an annular boss, and bearings are respectively sleeved on the upper side and the lower side of the annular boss;
the valve rod nut body and the bearing are arranged in the support, and a support plug screw is screwed into the upper part of the support and is tightly pressed on the bearing on the upper side;
the anti-flying nut is screwed and arranged at the upper end of the support, and the valve rod nut body penetrates out of the anti-flying nut.
2. The stem nut anti-pop structure of claim 1, wherein the outer periphery of the bracket is provided with a positioning groove, a screw is transversely screwed into the anti-pop nut and abuts against the positioning groove, the screw is provided with a positioning nut for positioning, and the positioning nut abuts against the outer periphery of the anti-pop nut.
3. The stem nut anti-flying structure as claimed in claim 1, wherein the support is a cylindrical structure, a first boss and a second boss are arranged inside the support, the bearing at the lower side is arranged on the first boss, and the bearing at the upper side is abutted against the inner wall of the second boss.
4. The stem nut anti-fly-out structure of claim 2, wherein the anti-fly nut comprises:
the cover plate is provided with a through hole for the valve rod nut body to penetrate out, and the cover plate is pressed on the support and the support screw plug;
and a side plate formed by extending the periphery of the cover plate downwards, wherein one side of the side plate is provided with a screw hole for the screw to pass through.
5. The stem nut anti-pop structure of claim 1, wherein a gap exists between the annular boss and the inner wall of the bracket, and an oil chamber is formed between the two bearings, the annular boss and the inner wall of the bracket.
6. The stem nut anti-flying structure as defined in claim 1, wherein the stem nut body is a hollow structure with a stem disposed therein.
7. The stem nut anti-flying structure as defined in claim 6, wherein the inner side of the stem nut body is provided with a trapezoidal thread adapted to the valve stem.
8. The stem nut anti-flying structure as defined in claim 5, wherein said bracket is provided with a pressure filling cup at a side thereof, said pressure filling cup being correspondingly disposed at a side of said oil chamber.
9. The stem nut anti-pop-out structure of claim 1, wherein the bearing is a flat thrust ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921209728.XU CN211010065U (en) | 2019-07-30 | 2019-07-30 | Valve rod nut anti-flying structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921209728.XU CN211010065U (en) | 2019-07-30 | 2019-07-30 | Valve rod nut anti-flying structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211010065U true CN211010065U (en) | 2020-07-14 |
Family
ID=71504873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921209728.XU Active CN211010065U (en) | 2019-07-30 | 2019-07-30 | Valve rod nut anti-flying structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211010065U (en) |
-
2019
- 2019-07-30 CN CN201921209728.XU patent/CN211010065U/en active Active
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