CN219755401U - Self-compensating packing type valve rod sealing mechanism and ball valve - Google Patents
Self-compensating packing type valve rod sealing mechanism and ball valve Download PDFInfo
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- CN219755401U CN219755401U CN202321005591.2U CN202321005591U CN219755401U CN 219755401 U CN219755401 U CN 219755401U CN 202321005591 U CN202321005591 U CN 202321005591U CN 219755401 U CN219755401 U CN 219755401U
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- valve rod
- packing
- valve
- sealing
- spring
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 238000012856 packing Methods 0.000 title claims abstract description 51
- 210000004907 gland Anatomy 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000945 filler Substances 0.000 description 7
- 241000251468 Actinopterygii Species 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of valves, in particular to a self-compensating packing type valve rod sealing mechanism and a ball valve, comprising a valve body, a valve rod, sealing packing, a packing pressing ring, a butterfly spring and a gland, wherein a sealing cavity is arranged at the circumferential position of the valve body corresponding to the valve rod, the sealing packing, the packing pressing ring and the butterfly spring are sequentially arranged in the sealing cavity, the gland is fixed on the valve body, the self-compensating packing type valve rod sealing mechanism further comprises a compression ring sleeved on the valve rod, a gap is reserved between the inner wall of the compression ring and the outer wall of the valve rod, the outer wall of the compression ring abuts against the radial inner end of the butterfly spring, the gland is in limit fit with the axial outer end of the butterfly spring, the axial inner end of the butterfly spring and the packing pressing ring form direct or indirect mechanical support fit, the butterfly spring is sleeved on the valve rod to separate the butterfly spring from the valve rod, the butterfly spring is prevented from being directly contacted with the valve rod, the valve rod is prevented from being scratched and blocked by the butterfly spring, the service life of the valve rod is prolonged, and the good sealing effect of the valve rod sealing mechanism is ensured.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a self-compensating packing type valve rod sealing mechanism and a ball valve.
Background
The sealing structure between the valve rod and the valve body of the ball valve is mainly formed by connecting sealing filler through a nut fastening mode, and the sealing structure has the defect that if the sealing filler is worn or the nut is loose, the sealing effect is reduced, so that the sealing filler cannot play a sealing role.
Through retrieving, chinese patent CN204477477U discloses a floating ball valve, including the valve body, take the spheroid of flow hole, the valve rod, disk seat and end cover, end cover and valve body fixed connection, and constitute the valve pocket, the spheroid is located the valve pocket, the one end of valve rod stretches into the valve pocket, and with spheroid fixed connection, the disk seat has two, and be located spheroidal both sides respectively, and respectively with valve body and end cover fixed connection, be equipped with first passageway and second passageway on valve body and the end cover respectively, still include the sealing packing, the belleville spring, the fastener, packing clamping ring, gland and indicator block, the sealing packing, packing clamping ring and belleville spring have down supreme order suit in proper order on the valve rod, the gland passes through fastener and valve body fixed connection, and tightly support the belleville spring, indicator block and valve rod fixed connection, this scheme carries out a self-compensating effect to the sealing packing through the clamp force of belleville spring, the problem that above-mentioned sealing effect descends has been solved well.
The inventors have further found that this solution still has the following problems: the belleville spring compresses under the compressive force of gland, makes belleville spring's internal diameter reduce, and the easy fish tail valve rod leads to the fact the damage, and especially when ball valve vertical installation, the valve rod is the level and places because the weight of spherical case is greater than the weight of valve rod, and under long-time operation, spherical case is to the gravity direction subsidence, drives the one end that the valve rod kept away from spherical case to upwarp, and when the valve continued to operate, the valve rod can lead to the fact the collision of bigger degree with the belleville spring, causes valve rod fish tail and crooked, makes the life of valve shorten.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings in the prior art and provides a self-compensating packing type valve rod sealing mechanism and a ball valve.
The technical scheme adopted by the utility model is as follows: the utility model provides a self-compensating packing formula valve rod sealing mechanism, includes valve body, valve rod, sealing packing, packing clamping ring, belleville spring and gland, the valve body be provided with sealed chamber corresponding to the circumference position of valve rod, sealed intracavity set gradually sealing packing, packing clamping ring, belleville spring, the gland be fixed in the valve body on, still including cup jointing the clamping ring on the valve rod, leave the clearance between the inner wall of this clamping ring and the outer wall of valve rod, the outer wall of clamping ring offsets with the radial inner of belleville spring, gland and the spacing cooperation of belleville spring axial outer end, the axial inner of belleville spring constitutes direct or indirect mechanics support cooperation with the packing clamping ring.
Preferably, an annular boss is arranged on the outer wall of the compression ring, one end of the annular boss abuts against the axial inner end of the belleville spring, and the other end abuts against the packing compression ring.
Preferably, the lower end surface of the gland is provided with an abutting cavity matched with the diameter of the pressure ring, the upper end of the pressure ring is inserted into the abutting cavity to be fixedly clamped with the gland, and the lower end of the pressure ring is inserted into the sealing cavity, and the outer wall of the pressure ring abuts against the inner wall of the sealing cavity.
Preferably, a spring mounting hole is formed in the side wall of one side of the valve rod, a spring and balls are arranged in the spring mounting hole, one end of the spring is abutted against the ball at the bottom of the spring mounting hole, and the balls are pressed against the inner wall of the valve body through the spring to the outside of the spring mounting hole.
Preferably, the inner wall edge of the spring mounting hole is extended inwards to form a clamping part, and the ball is arranged in the spring mounting hole in a manner of abutting against the clamping part.
Preferably, an elastic sealing ring is arranged between the valve rod and the valve body.
Preferably, the belleville springs are arranged in two and symmetrically attached mode.
The ball valve comprises a self-compensating packing type valve rod sealing mechanism, a spherical valve core and an end cover, wherein a spherical cavity for installing the spherical valve core is arranged in the valve body, the end cover is fixedly connected with the valve body, the spherical valve core is installed in the spherical cavity, and one end of the valve rod extends into the spherical cavity to be fixedly connected with the spherical valve core.
The beneficial effects of the utility model are as follows: through the cover establishes the clamping ring on the valve rod, separates belleville spring and valve rod, prevents direct contact, also leaves the clearance between clamping ring and the valve rod, and frictional force is too big when preventing clamping ring and valve rod relative rotation to cause the valve rod damage, and the protection valve rod prevents to be blocked by belleville spring fish tail card, and does not influence belleville spring's function, and belleville spring can provide the clamp force for sealing packing anyway, makes sealing packing layer automatic compensation after wearing and tearing, has both kept the good sealed effect of valve rod sealing mechanism and has prolonged the life of valve rod again.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of a self-compensating ball valve according to the present utility model;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is a schematic view of a press ring according to the present utility model;
in the figure, a valve rod, a 2-sealing filler, a 3-filler pressing ring, a 4-belleville spring, a 5-pressing cover, a 6-pressing ring, a 7-annular boss, an 8-abutting cavity, a 9-valve body, a 10-spherical valve core, an 11-end cover, a 12-spherical cavity, a 13-sealing cavity, a 14-spring mounting hole, a 15-spring, a 16-ball, a 17-clamping part and an 18-elastic sealing ring.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 4, in an embodiment of the present utility model, a self-compensating packing valve rod sealing mechanism includes a valve body 9, a valve rod 1, a packing 2, a packing pressing ring 3, a belleville spring 4, and a gland 5, wherein a sealing cavity 13 is disposed at a circumferential position of the valve body 9 corresponding to the valve rod 1, the packing 2, the packing pressing ring 3, and the belleville spring 4 are sequentially disposed in the sealing cavity 13, the gland 5 is fixed on the valve body 9, and further includes a pressing ring 6 sleeved on the valve rod 1, a gap is left between an inner wall of the pressing ring 6 and an outer wall of the valve rod 1, an outer wall of the pressing ring 6 abuts against a radially inner end of the belleville spring 4, the gland 5 is in limited fit with an axially outer end of the belleville spring 4, and the axially inner end of the belleville spring 3 and the packing pressing ring 3 form direct or indirect mechanical support fit. Through the cover establishes the clamping ring on the valve rod, separates belleville spring and valve rod, prevents direct contact, also leaves the clearance between clamping ring and the valve rod, and frictional force is too big when preventing clamping ring and valve rod relative rotation to cause the valve rod damage, and the protection valve rod prevents to be blocked by belleville spring fish tail card, and does not influence belleville spring's function, and belleville spring can provide the clamp force for sealing packing anyway, makes sealing packing layer automatic compensation after wearing and tearing, has both kept the good sealed effect of valve rod sealing mechanism and has prolonged the life of valve rod again.
The outer wall of the compression ring 6 is provided with an annular boss 7, one end of the annular boss 7 is propped against the axial inner end of the belleville spring 3, and the other end of the annular boss is propped against the packing compression ring 3. The belleville spring has pretightening force by means of extrusion deformation of the compression ring and the gland, and the annular boss on the compression ring provides better axial supporting force for the belleville spring.
The lower end face of the gland 5 is provided with an abutting cavity 8 matched with the diameter of the pressure ring 6, the upper end of the pressure ring 6 is inserted into the abutting cavity 8 to be fixedly clamped with the gland 5, the lower end of the pressure ring 6 is inserted into the sealing cavity 13, and the outer wall of the pressure ring abuts against the inner wall of the sealing cavity 13. The upper end of the compression ring is fixedly clamped with the abutting cavity on the compression cover, and the lower end of the compression ring is clamped with the sealing cavity, so that the compression ring is prevented from being offset and colliding with the valve rod.
The side wall of one side of the valve rod 1 is provided with a spring mounting hole 14, a spring 15 and a ball 16 are arranged in the spring mounting hole 14, one end of the spring 15 is abutted against the bottom of the spring mounting hole 14, the other end of the spring 15 is abutted against the ball 16, and the ball 16 is pressed outside the spring mounting hole 14 through the spring 15 to be abutted against the inner wall of the valve body 9. By the arrangement of the spring and the ball on the side wall of the valve rod near the spherical valve core, a transverse elastic compensation force of the valve rod is provided to prevent the valve rod from tilting or bending.
The edge of the inner wall of the spring mounting hole 14 is inwardly extended with a clamping part 17, and the ball 16 is arranged in the spring mounting hole 14 by abutting against the clamping part 17. The ball and the spring are fixed in the spring mounting hole through the clamping part, so that the ball is prevented from being separated from the spring mounting hole and entering the valve body to damage other parts.
An elastic sealing ring 18 is arranged between the valve rod 1 and the valve body 9. The tightness between the valve rod and the valve body is further improved through the elastic sealing ring.
The belleville springs 4 are symmetrically attached to each other. The two belleville springs have larger pressing force, so that the elastic compensation of the belleville springs to the sealing filler is ensured, and the sealing performance of the sealing filler is ensured.
The ball valve comprises a self-compensating packing type valve rod sealing mechanism, a spherical valve core 10 and an end cover 11, wherein a spherical cavity 12 for installing the spherical valve core 10 is arranged in the valve body 9, the end cover 11 is fixedly connected with the valve body 9, the spherical valve core 10 is installed in the spherical cavity 12, and one end of the valve rod 1 extends into the spherical cavity 12 to be fixedly connected with the spherical valve core 10.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (8)
1. The utility model provides a self-compensating packing formula valve rod sealing mechanism, includes valve body (9), valve rod (1), sealing packing (2), packing clamping ring (3), belleville spring (4) and gland (5), the circumference position that valve body (9) correspond valve rod (1) be provided with sealed chamber (13), sealed chamber (13) in set gradually sealing packing (2), packing clamping ring (3), belleville spring (4), gland (5) be fixed in on valve body (9), its characterized in that: still including cup jointing clamping ring (6) on valve rod (1), leave the clearance between the outer wall of inner wall and valve rod (1) of this clamping ring (6), the outer wall of clamping ring (6) offsets with the radial inner of belleville spring (4), gland (5) and belleville spring (4) axial outer end spacing fit, the axial inner of belleville spring (4) constitutes direct or indirect mechanical support cooperation with packing clamping ring (3).
2. A self compensating packing stem seal as defined in claim 1, wherein: the outer wall of the compression ring (6) is provided with an annular boss (7), one end of the annular boss (7) is propped against the axial inner end of the belleville spring (4), and the other end of the annular boss is propped against the packing compression ring (3).
3. A self compensating packing stem seal as defined in claim 1, wherein: the lower end face of the gland (5) is provided with an abutting cavity (8) matched with the diameter of the pressure ring (6), the upper end of the pressure ring (6) is inserted into the abutting cavity (8) to be fixedly clamped with the gland (5), and the lower end of the pressure ring (6) is inserted into the sealing cavity (13) and the outer wall of the pressure ring abuts against the inner wall of the sealing cavity (13).
4. A self compensating packing stem seal as defined in claim 1, wherein: the valve rod is characterized in that a spring mounting hole (14) is formed in one side wall of the valve rod (1), a spring (15) and a ball (16) are arranged in the spring mounting hole (14), one end of the spring (15) is abutted against the ball (16) at the other end of the bottom of the spring mounting hole (14), and the ball (16) is pressed against the inner wall of the valve body (9) towards the outside of the spring mounting hole (14) through the spring (15).
5. A self compensating packing stem seal as defined in claim 4, wherein: the edge of the inner wall of the spring mounting hole (14) is inwards extended to form a clamping part (17), and the ball (16) is arranged in the spring mounting hole (14) in a manner of being abutted with the clamping part (17).
6. A self compensating packing stem seal as defined in claim 1, wherein: an elastic sealing ring (18) is arranged between the valve rod (1) and the valve body (9).
7. A self compensating packing stem seal as defined in claim 1, wherein: the belleville springs (4) are symmetrically attached to each other.
8. A ball valve, characterized in that: the self-compensating packing type valve rod sealing mechanism comprises the self-compensating packing type valve rod sealing mechanism disclosed by claim 1, and further comprises a spherical valve core (10) and an end cover (11), wherein a spherical cavity (12) for installing the spherical valve core (10) is arranged in the valve body (9), the end cover (11) is fixedly connected with the valve body (9), the spherical valve core (10) is installed in the spherical cavity (12), and one end of the valve rod (1) extends into the spherical cavity (12) to be fixedly connected with the spherical valve core (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005591.2U CN219755401U (en) | 2023-04-25 | 2023-04-25 | Self-compensating packing type valve rod sealing mechanism and ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005591.2U CN219755401U (en) | 2023-04-25 | 2023-04-25 | Self-compensating packing type valve rod sealing mechanism and ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219755401U true CN219755401U (en) | 2023-09-26 |
Family
ID=88075020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321005591.2U Active CN219755401U (en) | 2023-04-25 | 2023-04-25 | Self-compensating packing type valve rod sealing mechanism and ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219755401U (en) |
-
2023
- 2023-04-25 CN CN202321005591.2U patent/CN219755401U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |