CN209977426U - Valve rod sealing structure of floating ball valve - Google Patents
Valve rod sealing structure of floating ball valve Download PDFInfo
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- CN209977426U CN209977426U CN201920604559.3U CN201920604559U CN209977426U CN 209977426 U CN209977426 U CN 209977426U CN 201920604559 U CN201920604559 U CN 201920604559U CN 209977426 U CN209977426 U CN 209977426U
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Abstract
The utility model belongs to the technical field of the valve, concretely relates to valve rod sealing structure of ball valve floats, including valve body, valve rod and gland, gland is last be equipped with the first through-hole of valve rod complex, first through-hole inner wall lower extreme is equipped with an annular groove and forms the stuffing box, be equipped with in the stuffing box with the sealed complex filler of valve rod, the through-hole inner wall is equipped with first sealing washer recess in the top of stuffing box, be equipped with in the first sealing washer recess with the sealed complex first sealing member of valve rod, the gland outer wall is equipped with second sealing washer recess, be equipped with the second through-hole on the valve body, be equipped with in the second sealing washer recess with the sealed complex second sealing member of second through-hole inner wall. The valve rod seal is optimized and improved, the grooves of the sealing element are additionally arranged on the inner hole and the outer circle of the packing pressing sleeve, and the sealing element is arranged to ensure that the leakage grade of the sealing performance meets the standard regulation and the requirements of users.
Description
Technical Field
The utility model belongs to the technical field of the valve, concretely relates to valve rod seal structure of ball valve floats.
Background
The valve rod of the common floating ball valve is provided with a sealing mechanism to prevent liquid inside the valve body from leaking, the sealing mechanism comprises a valve body, a valve rod and a packing gland, annular packing is arranged on the valve rod along the radial direction, the valve rod is arranged in the valve body, and a packing box matched with the packing is arranged on the inner side wall of the valve body. For the floating ball valve, the valve rod is completely sealed by graphite packing, and the requirement of grade A leakage grade standard of ISO15848, ISO15848 dissipation leakage test is not easily met.
Disclosure of Invention
The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a valve rod seal structure of ball valve floats.
The utility model discloses the technical scheme who takes as follows: the utility model provides a valve rod seal structure of ball valve floats, includes valve body, valve rod and gland, gland is last be equipped with the first through-hole of valve rod complex, first through-hole inner wall lower extreme is equipped with an annular groove and forms the stuffing box, be equipped with in the stuffing box with the sealed complex packing of valve rod, the through-hole inner wall is equipped with first sealing washer recess in the top of stuffing box, be equipped with in the first sealing washer recess with the first sealing member of the sealed complex of valve rod, the gland outer wall is equipped with second sealing washer recess, be equipped with the second through-hole on the valve body, be equipped with in the second sealing washer recess with the sealed complex second sealing member of second through-hole inner wall.
The first sealing element is an O-shaped sealing ring.
The second sealing element is an O-shaped sealing ring.
A protruding ring is arranged on the inner wall of the second through hole, a PTFE bearing is arranged between the upper end of the protruding ring and the lower end of the packing gland, and the PTFE bearing is located below the packing.
The PTFE bearing is two, and superposes from top to bottom.
The valve rod is provided with a first radial deep hole, a first spring and a first steel ball are sequentially arranged in the first radial deep hole, and the first steel ball is in abutting contact with the inner wall of the convex ring.
The ball body is connected to the lower end of the valve rod, a second radial deep hole is formed in the valve rod, a second spring and a second steel ball are sequentially arranged in the second radial deep hole, and the second steel ball is in top contact with the ball body.
The utility model has the advantages as follows: the valve rod seal is optimized and improved, the grooves of the sealing element are additionally arranged on the inner hole and the outer circle of the packing pressing sleeve, and the sealing element is arranged to ensure that the leakage grade of the sealing performance meets the standard regulation and the requirements of users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1, a valve body; 2, a valve rod; 3, a packing gland; 4, filling; 5, a first seal; 6, a second seal; 7, a convex ring; 8, a PTFE bearing; 9, a first radial deep hole; 10, a first spring; 11, a first steel ball; 12, a sphere; 13, a second radial deep hole; 14, a second spring; 15, a second steel ball.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.
The utility model provides a valve rod seal structure of ball valve floats, includes valve body 1, valve rod 2 and gland 3, gland 3 is last be equipped with the first through-hole of 2 complex of valve rod, first through-hole inner wall lower extreme is equipped with an annular groove and forms the stuffing box, be equipped with in the stuffing box with the sealed complex packing 4 of valve rod 2, the through-hole inner wall is equipped with first sealing washer recess in the top of stuffing box, be equipped with in the first sealing washer recess with the sealed complex first sealing member 5 of valve rod 2, the 3 outer walls of gland are equipped with second sealing washer recess, be equipped with the second through-hole on the valve body 1, be equipped with in the second sealing washer recess with the sealed complex second sealing member 6 of second through-hole inner wall. The valve rod seal is optimized and improved, the grooves of the sealing element are additionally arranged on the inner hole and the outer circle of the packing pressing sleeve, and the sealing element is arranged to ensure that the leakage grade of the sealing performance meets the standard regulation and the requirements of users.
The first sealing element 5 is an O-shaped sealing ring.
The second sealing element 6 is an O-shaped sealing ring.
A convex ring 7 is arranged on the inner wall of the second through hole, a PTFE bearing 8 is arranged between the upper end of the convex ring 7 and the lower end of the packing gland 3, and the PTFE bearing 8 is located below the packing 4. In order to reduce the valve torque, a PTFE bearing is added in an inner hole of a packing pressing sleeve, the friction coefficient of PTFE is small, the friction force is reduced, and the valve torque is reduced.
The number of the PTFE bearings 8 is two, and the PTFE bearings are superposed up and down.
The valve rod 2 is provided with a first radial deep hole 9, a first spring 10 and a first steel ball 11 are sequentially arranged in the first radial deep hole 9, and the first steel ball 11 is in top contact with the inner wall of the convex ring 7. The spring-plunger type static leading-out device is adopted to form a static channel between the valve rod and the valve body, so that the aim of eliminating static accumulation is fulfilled.
The lower end of the valve rod 2 is connected with a ball body 12, a second radial deep hole 13 is formed in the valve rod 2, a second spring 14 and a second steel ball 15 are sequentially arranged in the second radial deep hole 13, and the second steel ball 15 is in top contact with the ball body 12. So that a static passage is formed between the ball body and the valve rod, and the purpose of eliminating static accumulation is achieved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (7)
1. The utility model provides a valve rod seal structure of ball valve floats, includes valve body (1), valve rod (2) and gland (3), its characterized in that: be equipped with on gland (3) with valve rod (2) complex first through-hole, first through-hole inner wall lower extreme is equipped with an annular groove and forms the packing box, be equipped with in the packing box with valve rod (2) sealed complex packing (4), the through-hole inner wall is equipped with first sealing washer recess in the top of packing box, be equipped with in the first sealing washer recess with valve rod (2) sealed complex first sealing member (5), gland (3) outer wall is equipped with second sealing washer recess, be equipped with the second through-hole on valve body (1), be equipped with in the second sealing washer recess with second through-hole inner wall sealed complex second sealing member (6).
2. A stem seal arrangement for a floating ball valve according to claim 1, wherein: the first sealing element (5) is an O-shaped sealing ring.
3. A stem seal arrangement for a floating ball valve according to claim 1, wherein: the second sealing element (6) is an O-shaped sealing ring.
4. A stem seal arrangement for a floating ball valve according to claim 1, wherein: the inner wall of the second through hole is provided with a convex ring (7), a PTFE bearing (8) is arranged between the upper end of the convex ring (7) and the lower end of the packing gland (3), and the PTFE bearing (8) is positioned below the packing (4).
5. A stem seal arrangement for a floating ball valve according to claim 4, wherein: the PTFE bearings (8) are two and are superposed up and down.
6. A stem seal arrangement for a floating ball valve according to claim 4, wherein: be equipped with first radial deep hole (9) on valve rod (2), first spring (10) and first steel ball (11) have set gradually in first radial deep hole (9), first steel ball (11) and bulge loop (7) inner wall top are touched.
7. A stem seal arrangement for a floating ball valve according to claim 1, wherein: the ball body (12) is connected to valve rod (2) lower extreme, be equipped with radial deep hole of second (13) on valve rod (2), second spring (14) and second steel ball (15) have set gradually in the radial deep hole of second (13), second steel ball (15) and spheroid (12) top are touched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920604559.3U CN209977426U (en) | 2019-04-29 | 2019-04-29 | Valve rod sealing structure of floating ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920604559.3U CN209977426U (en) | 2019-04-29 | 2019-04-29 | Valve rod sealing structure of floating ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209977426U true CN209977426U (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920604559.3U Active CN209977426U (en) | 2019-04-29 | 2019-04-29 | Valve rod sealing structure of floating ball valve |
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| Country | Link |
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| CN (1) | CN209977426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116085524A (en) * | 2023-02-10 | 2023-05-09 | 北京星河动力装备科技有限公司 | Pneumatic valve and carrier rocket |
-
2019
- 2019-04-29 CN CN201920604559.3U patent/CN209977426U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116085524A (en) * | 2023-02-10 | 2023-05-09 | 北京星河动力装备科技有限公司 | Pneumatic valve and carrier rocket |
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