CN219712405U - Hard seal ball valve - Google Patents
Hard seal ball valve Download PDFInfo
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- CN219712405U CN219712405U CN202321157683.2U CN202321157683U CN219712405U CN 219712405 U CN219712405 U CN 219712405U CN 202321157683 U CN202321157683 U CN 202321157683U CN 219712405 U CN219712405 U CN 219712405U
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- valve
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- seat
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- 238000007789 sealing Methods 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 8
- 230000014509 gene expression Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- -1 steam Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the technical field of valves, in particular to a hard sealing ball valve, wherein valve seats are arranged on two sides of a spherical valve core, a medium channel is arranged in a valve body, a valve core channel communicated with the medium channel is arranged in the spherical valve core, a compensation device is arranged between the valve seat and the valve body, the compensation device comprises an elastic sealing sleeve, a cavity is arranged in the elastic sealing sleeve, a pre-tightening elastic piece axially parallel to the medium channel in the valve body is arranged in the cavity, baffle plates are arranged on two ends of the pre-tightening elastic piece, the baffle plates on two ends are attached to inner walls on two sides of the cavity, two ends extend towards the center direction, and an abutting part is arranged on the two ends of the pre-tightening elastic piece.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a hard sealing ball valve.
Background
The surface of the manual cast steel hard sealing ball valve adopts an advanced spraying technology, and the highest hardness can reach HRC78 through the treatment of various different working conditions. The highest hardness of the valve seat sealing surface can reach HRC72. The ball body and the valve seat are subjected to pairing grinding, and all sealing areas of the whole sealing surface of the ball valve are subjected to precise grinding. Suitable for high temperature and high pressure water, steam, petroleum, coal, fiber, thick and corrosive media and particulate media. The metal sealing ball valve is provided with a floating ball and a fixed ball, and two structures of a metal valve seat ring is contacted with the spherical surface, so that the valve seat ring and the spherical surface form a seal through uniform spring load acted on the valve seat ring;
the traditional hard sealing ball valve has high matching precision requirement and high assembly precision requirement, so the corresponding processing precision and process requirements on the spherical valve core, the valve body and the valve seat are high.
Through retrieval, chinese patent CN201502738U discloses a bidirectional hard seal ball valve, which comprises a valve body, a spherical valve core in a valve cavity and valve seats respectively arranged between two sides of the spherical valve core and the valve body, wherein the spherical valve core is connected with a valve rod extending out of the valve body and rotates along with the valve rod, a gasket cavity is arranged between the axial end surfaces of the valve seats on two sides, facing away from the spherical valve core, and the valve body, and the valve seats are axially supported by valve seat gaskets arranged in the gasket cavity; the valve rod is connected with the spherical valve core through the sliding block structure, the sliding direction of which is perpendicular to the axial direction of the channel of the spherical valve core, and the scheme well solves the problems.
The inventors have further found that this solution still has the following problems: the sealing surface between the valve seat and the valve core is worn by using the valve seat and the spherical valve core for a long time, so that a gap is generated between the valve seat and the valve core, and the sealing effect of the ball valve is deteriorated.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings of the prior art and provides a hard sealing ball valve.
The technical scheme adopted by the utility model is as follows: the utility model provides a hard seal ball valve, includes valve body and spherical case, be equipped with in the valve body and supply spherical case pivoted rotation chamber, be equipped with valve rod and spherical case in the rotation chamber, valve rod one end is pegged graft the other end with spherical case and is extended to the valve body external connection and have slewing mechanism, spherical case both sides all are equipped with the disk seat, be equipped with the medium passageway in the valve body, be equipped with the case passageway that link up with the medium passageway in the spherical case, be equipped with compensation arrangement between disk seat and the valve body, compensation arrangement includes the elasticity seal cover, be equipped with the cavity in the elasticity seal cover, be equipped with the pretension elastic component with in the valve body medium passageway axial parallel in the cavity, pretension elastic component both ends all are equipped with the baffle, the baffle at both ends all laminates and both ends all extend to central direction and have the butt portion with the cavity both sides inner wall.
Preferably, the valve seat comprises a first valve seat (5) and a second valve seat (6), a self-sealing device is arranged between the second valve seat and the valve body, the self-sealing device comprises a first pressing ring, a second pressing ring and a graphite ring, the first pressing ring is attached to the valve body, the second pressing ring is attached to the second valve seat, a pressing ring groove is formed in one side surface of the first pressing ring, which is close to the second pressing ring, of the second pressing ring, a conical block is arranged on the second pressing ring, a clamping part matched with the pressing ring groove is arranged on the conical block, a conical angle is arranged at the joint of the conical block and the second pressing ring, and the width of the conical angle is smaller than that of the clamping part, and the graphite ring is sleeved on the periphery of the conical block.
Preferably, an arc spring is arranged between the second compression ring and the second valve seat, both ends of the arc spring are propped against the second compression ring, and the arc top of the arc spring is propped against the second valve seat.
Preferably, a pressing block and a valve seat sealing ring which are sequentially connected are arranged between the second valve seat and the valve body.
Preferably, one end of the valve seat, which is close to the spherical valve core, is overlaid with a metal sealing layer, and the outer surface of the metal sealing layer is matched with the outer surface of the spherical valve core.
Preferably, the valve body comprises a left valve body and a right valve body, a valve body sealing ring is arranged between the left valve body and the right valve body, and the left valve body and the right valve body are fixedly connected through a bolt piece.
Preferably, the joint of the valve rod and the spherical valve core is provided with a plurality of transmission pins, the transmission pins are uniformly distributed on the circumference of the bottom end of the valve rod, the axes of the transmission pins are parallel to the axes of the valve rod, and the valve rod is in plug-in fit with the spherical valve core through the transmission pins.
The beneficial effects of the utility model are as follows: when the ball valve is opened and closed, the spherical valve core rotates, the valve seat is worn due to friction between the ball valve core and the ball valve core, so that a gap is formed between the valve seat and the spherical valve core, the valve seat is attached to the spherical valve core by means of the thrust generated on the valve seat through the elasticity of the pre-tightening elastic piece, the gap between the valve seat and the spherical valve core is reduced, the tightness of the ball valve is improved, and the service life of the ball valve is prolonged.
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 view of a hard seal ball valve according to the present utility model;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of FIG. 1 at B;
in the figure, 1-valve body, 2-spherical valve core, 3-valve rod, 4-rotary mechanism, 5-first disk seat, 6-second disk seat, 7-elastic seal cover, 8-cavity, 9-pretension elastic piece, 10-baffle, 11-abutment portion, 12-first clamping ring, 13-second clamping ring, 14-graphite ring, 15-annular pressing groove, 16-conical block, 17-clamping portion, 18-conical angle, 19-arc spring, 20-briquetting, 21-disk seat sealing ring, 22-metal sealing layer, 23-valve body sealing ring, 24-driving pin.
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 3, in an embodiment of the present utility model, a hard seal ball valve includes a valve body 1 and a spherical valve core 2, a rotating cavity for rotating the spherical valve core 2 is provided in the valve body 1, a valve rod 3 and the spherical valve core 2 are provided in the rotating cavity, one end of the valve rod 3 is connected with the spherical valve core 2 in a plugging manner, the other end of the valve rod extends to the outside of the valve body 1 and is connected with a rotating mechanism 4, both sides of the spherical valve core 2 are provided with valve seats, a medium channel is provided in the valve body 1, a valve core channel penetrating the medium channel is provided in the spherical valve core 2, a compensating device is provided between the valve seat and the valve body 1, the compensating device includes an elastic sealing sleeve 7, a cavity 8 is provided in the elastic sealing sleeve 7, a pre-tightening elastic member 9 axially parallel to the medium channel in the valve body 1 is provided in the cavity 8, both ends of the pre-tightening elastic member 9 are provided with a baffle 10, both ends of the baffle 10 are attached to both inner walls of the cavity 8 and both ends extend toward the center direction.
The valve seat comprises a first valve seat 5 and a second valve seat 6, a self-sealing device is arranged between the second valve seat 6 and the valve body 1, the self-sealing device comprises a first pressure ring 12, a second pressure ring 13 and a graphite ring 14, the first pressure ring 12 is attached to the valve body 1, the second pressure ring 13 is attached to the second valve seat 6, a pressure ring groove 15 is arranged on one side surface of the first pressure ring 12, which is close to the second pressure ring 13, a conical block 16 is arranged on the second pressure ring 13, a clamping part 17 which is matched with the pressure ring groove 15 is arranged on the conical block 16, a conical angle 18 is arranged at the joint of the conical block 16 and the second pressure ring 13, the width of the conical angle 18 is smaller than the width of the clamping part 17, and the graphite ring 14 is sleeved on the periphery of the conical block 16.
An arc spring 19 is arranged between the second compression ring 13 and the second valve seat 6, both ends of the arc spring 19 are propped against the second compression ring 13, and the arc top of the arc spring 19 is propped against the second valve seat 6.
A pressing block 20 and a valve seat sealing ring 21 which are sequentially connected are arranged between the second valve seat 6 and the valve body 1.
And one end of the valve seat, which is close to the spherical valve core 2, is overlaid with a metal sealing layer 22, and the outer surface of the metal sealing layer 22 is matched with the outer surface of the spherical valve core 2.
The valve body 1 comprises a left valve body and a right valve body, a valve body sealing ring 23 is arranged between the left valve body and the right valve body, and the left valve body and the right valve body are fixedly connected through bolt pieces.
The valve rod 3 is provided with a plurality of transmission pins 24 at the joint with the spherical valve core 2, the transmission pins 24 are uniformly distributed on the circumference of the bottom end of the valve rod 3, the axis of the transmission pins 24 is parallel to the axis of the valve rod 3, and the valve rod 3 is in plug-in fit with the spherical valve core 2 through the transmission pins 24.
When the ball valve is opened and closed, the spherical valve core rotates, the valve seat is worn due to friction between the ball valve core and the ball valve core, so that a gap is formed between the valve seat and the spherical valve core, the valve seat is attached to the spherical valve core by generating a thrust to the valve seat through the elasticity of the pre-tightening elastic piece, the gap between the valve seat and the spherical valve core is reduced, the gap compensation effect is achieved, the tightness of the ball valve is improved, and the service life of the ball valve is prolonged;
the sealing effect between the valve seat and the valve body is improved through the elastic sealing sleeve, and the medium is prevented from entering between the pre-tightening elastic pieces, and the pre-tightening elastic pieces are prevented from being blocked to cause failure;
the baffle plates at the two ends of the inner cavity of the elastic sealing sleeve provide better supporting force for the pre-tightening elastic piece, and the abutting parts extending at the two ends prevent the pre-tightening elastic piece from being displaced or twisted, so that the compensation clearance effect of the pre-tightening elastic piece is ensured;
a compensating device is arranged between the first valve seat and the valve body, and a self-sealing device is arranged between the second valve seat and the valve body;
the self-sealing device of the first compression ring, the second compression ring and the graphite ring structure is adopted, the second compression ring is propped against the first compression ring through the conical block, and when the second compression ring is compressed, the conical angle on the conical block deforms towards the conical block to cause the graphite ring to be extruded, so that the self-sealing effect is better, and the sealing effect of the valve seat and the valve body is further improved;
the arc-shaped springs are propped against the second pressing ring, so that the stress effect of the upper end and the lower end of the second pressing ring is further increased, and the graphite ring is easier to deform to be extruded;
a pressing block is arranged between the valve seat and the valve body, and the pressing block is propped against the arc top of the arc spring, so that the stress of the arc spring is uniform, the arc spring is prevented from sliding out of a working position, and the sealing effect of the gap between the valve seat and the valve body is improved through a valve seat sealing ring;
the metal sealing layer deposited on the valve seat can greatly improve the wear resistance of the valve seat, prolong the service life of the valve and reduce the maintenance and replacement of parts;
the ball valve body is of a detachable structure, and the sealing ring of the valve body ensures the tightness of the joint of the left valve body and the right valve body;
the transmission pin between the valve rod and the spherical valve core can be better fixedly connected with the valve rod and the spherical valve core, and when the valve rod and the spherical valve core are blocked, the transmission pin is only damaged, the valve rod and the spherical valve core are not affected, and the maintenance cost is reduced.
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 (7)
1. The utility model provides a hard seal ball valve, includes valve body (1) and spherical case (2), its characterized in that: be equipped with in the valve body (1) and supply spherical case (2) pivoted rotation chamber, be equipped with valve rod (3) and spherical case (2) in the rotation chamber, valve rod (3) one end and spherical case (2) peg graft the other end and extend to valve body (1) external connection have slewing mechanism (4), spherical case (2) both sides all are equipped with the disk seat, be equipped with the medium passageway in valve body (1), be equipped with the case passageway that link up with the medium passageway in spherical case (2), be equipped with compensation arrangement between disk seat and valve body (1), compensation arrangement includes elastic sealing sleeve (7), be equipped with cavity (8) in elastic sealing sleeve (7), be equipped with in cavity (8) with medium passageway axial parallel pretension elastic component (9), pretension elastic component (9) both ends all are equipped with baffle (10), baffle (10) and cavity (8) both sides inner wall at both ends all laminate and both ends all extend to central direction have butt portion (11).
2. The hard seal ball valve of claim 1 wherein: the valve seat comprises a first valve seat (5) and a second valve seat (6), a self-sealing device is arranged between the second valve seat (6) and the valve body (1), the self-sealing device comprises a first pressing ring (12), a second pressing ring (13) and a graphite ring (14), the first pressing ring (12) is attached to the valve body (1), the second pressing ring (13) is attached to the second valve seat (6), a pressing ring groove (15) is arranged on one side surface of the first pressing ring (12) close to the second pressing ring (13), a conical block (16) is arranged on the second pressing ring (13), a clamping portion (17) matched with the pressing ring groove (15) is arranged on the conical block (16), a conical angle (18) is arranged at the joint of the conical block (16) and the second pressing ring (13), and the width of the conical angle (18) is smaller than that of the clamping portion (17), and the graphite ring (14) is sleeved on the periphery of the conical block (16).
3. A hard seal ball valve as defined in claim 2 wherein: an arc spring (19) is arranged between the second compression ring (13) and the second valve seat (6), two ends of the arc spring (19) are propped against the second compression ring (13), and the arc top of the arc spring (19) is propped against the second valve seat (6).
4. A hard seal ball valve as defined in claim 2 wherein: a pressing block (20) and a valve seat sealing ring (21) which are sequentially connected are arranged between the second valve seat (6) and the valve body (1).
5. The hard seal ball valve of claim 1 wherein: one end of the valve seat, which is close to the spherical valve core (2), is respectively overlaid with a metal sealing layer (22), and the outer surface of the metal sealing layer (22) is matched with the outer surface of the spherical valve core (2).
6. The hard seal ball valve of claim 1 wherein: the valve body (1) comprises a left valve body and a right valve body, a valve body sealing ring (23) is arranged between the left valve body and the right valve body, and the left valve body and the right valve body are fixedly connected through bolt pieces.
7. The hard seal ball valve of claim 1 wherein: the valve rod (3) is provided with a plurality of transmission pins (24) at the joint of the spherical valve core (2), the transmission pins (24) are uniformly distributed on the circumference of the bottom end of the valve rod (3), the axis of the transmission pins (24) is parallel to the axis of the valve rod (3), and the valve rod (3) is in plug-in fit with the spherical valve core (2) through the transmission pins (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321157683.2U CN219712405U (en) | 2023-05-11 | 2023-05-11 | Hard seal ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321157683.2U CN219712405U (en) | 2023-05-11 | 2023-05-11 | Hard seal ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219712405U true CN219712405U (en) | 2023-09-19 |
Family
ID=87996679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321157683.2U Active CN219712405U (en) | 2023-05-11 | 2023-05-11 | Hard seal ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219712405U (en) |
-
2023
- 2023-05-11 CN CN202321157683.2U patent/CN219712405U/en active Active
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