CN213117571U - Hard sealing fixed ball valve - Google Patents
Hard sealing fixed ball valve Download PDFInfo
- Publication number
- CN213117571U CN213117571U CN202021353958.6U CN202021353958U CN213117571U CN 213117571 U CN213117571 U CN 213117571U CN 202021353958 U CN202021353958 U CN 202021353958U CN 213117571 U CN213117571 U CN 213117571U
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- valve rod
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- 238000007789 sealing Methods 0.000 title claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims description 14
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000007774 longterm Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Details Of Valves (AREA)
Abstract
A hard seal fixed ball valve is provided with a valve seat sealing mechanism which comprises a pressing ring, a graphite ring, a valve seat and a pressure spring, wherein the valve seat is matched with a ball body; the pressure spring is arranged between the pressing ring and the valve body, the elastic force of the pressure spring is arranged towards the direction of the ball body, the axial section of the graphite ring is trapezoidal, the graphite ring is provided with a first conical surface and a second conical surface, the valve seat is provided with a third conical surface, the pressing ring is provided with a fourth conical surface, a first included angle gap is formed between the first conical surface and the third conical surface, the first included angle gap is large and inner-pointed, a second included angle gap is formed between the second conical surface and the fourth conical surface, and the second included angle gap is large and outer-pointed. The first and second included angle gaps enable the graphite ring and the pressing ring to have gaps with angle difference values respectively, axial and radial pressures of the graphite ring are increased progressively, and radial sealing among the valve seat, the valve body and the valve cover is guaranteed through small acting force.
Description
Technical Field
The utility model relates to a valve, in particular to fixed ball valve of hard seal.
Background
The hard sealing fixed ball valve is widely applied to the industries of petroleum, natural gas, chemical industry, medicine, paper making and the like.
For the occasion that the temperature of the used medium is not high, the O-shaped ring seal is adopted between the valve seat and the valve body, the O-shaped ring is made of rubber and is limited by the temperature of the rubber material, and for the occasion that the temperature is higher, the O-shaped ring seal is easy to age rapidly and lose efficacy under the high-temperature working condition, so that the valve seat seal is leaked.
In addition, after the valve rod runs for a long time under the working condition of high temperature and high pressure, the graphite packing in the valve cover is abraded inevitably due to frequent rotation of the valve rod, and the medium is easy to leak from the packing, so that the production is influenced.
SUMMERY OF THE UTILITY MODEL
In view of the technical problem who exists among the background art, the utility model aims at providing a long-term operation is stable, sealing performance is good sealed fixed ball valve firmly.
In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a fixed ball valve sealed firmly, including the valve body, the valve gap, go up the valve stem seat, go up the valve stem, lower valve rod and spheroid, the valve gap is connected with the valve body, go up the valve stem seat and connect on the valve body, the spheroid respectively with last valve stem, lower valve rod is connected, the spheroid sets up in the valve body, all be provided with medium passage on valve body and the valve gap, the spheroid is located between the medium passage of valve body and valve gap, the port department that links up between medium passage and the spheroid is equipped with valve seat sealing mechanism, its characterized in that respectively: the valve seat sealing mechanism comprises a pressing ring, a graphite ring, a valve seat and a pressure spring, the valve seat is matched with the ball body, the graphite ring is arranged between the pressing ring and the valve seat, the graphite ring is sleeved on the valve seat or the circumferential surface part of the pressing ring, and the graphite ring is clamped between the circumferential surface part and the inner wall of the port of the medium channel; the pressure spring is arranged between the pressing ring and the valve body or the valve cover, the elastic force of the pressure spring is arranged towards the direction of the ball body, the axial cross section of the graphite ring is trapezoidal, the graphite ring is provided with a first conical surface and a second conical surface, the valve seat is provided with a third conical surface, the pressing ring is provided with a fourth conical surface, the first conical surface is opposite to the third conical surface, a first included angle gap is formed between the first conical surface and the third conical surface, the first included angle gap is large and inner sharp, the second conical surface is opposite to the fourth conical surface, a second included angle gap is formed between the second conical surface and the fourth conical surface, and the second included angle gap is large and outer sharp.
The end of the medium channel is provided with a step ring vertical surface, and the pressure spring is positioned between the inside of the step ring and the pressing ring.
The pressing ring is provided with a spring mounting hole, and the pressure spring adopts a cylindrical spring.
The pressing ring is matched with the valve body or the valve cover in an axial floating and guiding way, and the pressing ring is matched with the valve seat in an axial floating and guiding way.
An upper bearing is arranged between the upper valve rod and the upper valve rod seat, a middle bearing is arranged between the upper valve rod and the valve body, a lower bearing is arranged between the lower valve rod and the ball body, packing is arranged between the upper valve rod seat and the upper valve rod, a gland is further arranged on the upper valve rod seat and pressed on the packing, the gland is connected with the upper valve rod through a fastener, and the fastener is provided with a disc spring.
The trapezoid is an isosceles trapezoid.
The beneficial effects of the utility model are that, give the clamping ring reapplication on the disk seat by biasing spring in this hard sealed fixed ball valve, the disk seat pretightning force is provided by biasing spring, no matter how temperature and pressure change, biasing spring gives thrust of disk seat all the time, can guarantee the sealing performance of valve under the low pressure operating mode, can repair the wearing and tearing of sealed face again, guarantees that the leakage grade of disk seat reaches the requirement. First contained angle clearance and second contained angle clearance make graphite ring and clamping ring, have the space of angle difference respectively with the disk seat for the axial of graphite ring and radial pressure distribution increase progressively, and the more close to the specific pressure of sealed point department is big more, because the existence in space of angle difference just can guarantee the radial seal between disk seat and valve body, the valve gap through very little effort. Through three bearing positioning, the force transmission between the ball body and the upper and lower valve rods is more stable, the opening and closing are flexible and smooth, and the blocking phenomenon is avoided. The disc spring is additionally arranged for pre-tightening, so that effective sealing of the packing is guaranteed, medium leakage is prevented, leakage caused by loosening of a gland bolt or loosening of the packing is avoided, and effective sealing of the packing in long-term use is guaranteed.
Drawings
The following describes details and operational principles of embodiments and examples of the present invention with reference to the drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
Fig. 3 is an enlarged view of B in fig. 2.
Detailed Description
Referring to the attached drawings, in the present embodiment, a hard seal fixed ball valve includes a valve body 1, a bonnet 2, an upper valve stem seat 13, an upper valve stem 5, a lower valve stem 4, and a ball 3, the bonnet 2 is connected to the valve body 1, the upper valve stem seat 13 is connected to the valve body 1, the ball 3 is connected to the upper valve stem 5 and the lower valve stem 4, the ball 3 is disposed in the valve body 1, and the valve body and the bonnet are both provided with medium passages 21 and 22, one of which is an inlet medium passage and the other is an outlet medium passage. The spheroid 3 is located between the medium channel of valve body and valve gap, and the spheroid is located the cavity promptly, and the port department that links up between medium channel and the spheroid is equipped with disk seat sealing mechanism respectively to cooperate with the spheroid sealed, have spheroid passageway 23 on the spheroid.
The valve seat sealing mechanism comprises a pressing ring 7, a graphite ring 8, a valve seat 9 and a pressure spring 6, the valve seat 9 is matched with the ball body 3 for sealing, the graphite ring 8 is arranged between the pressing ring and the valve seat, the graphite ring 8 is sleeved on the valve seat or the circumferential surface of the pressing ring, the graphite ring 8 is sleeved on the circumferential surface of the pressing ring in the drawing, and the graphite ring 8 is clamped between the circumferential surface and the inner wall (namely the pore canal wall) of the port of the medium channel. The pressure spring 6 is arranged between the pressing ring 7 and the valve body or the valve cover, the elastic force of the pressure spring 6 is arranged towards the direction of the ball body 3, the pressure spring applies pressure to the pressing ring and then acts on the valve seat, the pretightening force of the valve seat is provided by the pressure spring, and the pressure spring 6 always provides a thrust force for the valve seat 9 no matter how the temperature and the pressure change, so that the sealing performance of the valve under a low-pressure working condition can be ensured, the abrasion of a sealing surface can be repaired, and the leakage grade of the valve seat can meet the requirement. The valve seat sealing mechanisms on two sides of the ball body are arranged symmetrically left and right in the figure.
The axial cross-section of graphite ring 8 is trapezoidal, two base angles are the acute angle, graphite ring 8 has first conical surface and second conical surface, first conical surface is close to the spheroid, the third conical surface has on the disk seat 9, clamping ring 7 has the fourth conical surface, first conical surface is relative with the third conical surface, form first contained angle clearance between first conical surface and the third conical surface, the outer big interior point in first contained angle clearance, the closed angle of first contained angle is inwards, the second conical surface is relative with the fourth conical surface, form second contained angle clearance between second conical surface and the fourth conical surface, the big outer point in the second contained angle clearance, the closed angle of second contained angle is outwards. First contained angle clearance and second contained angle clearance make graphite ring and clamping ring, have the space of angle difference value respectively with the disk seat, the closed angle of first contained angle inwards, the closed angle of second contained angle outwards for the axial and the radial pressure distribution of graphite ring increase progressively, and the specific pressure that is close to sealed point department more is big more, because the existence in the space of angle difference value, just can guarantee the radial seal between disk seat and valve body, the valve gap through very little effort.
For the occasions with higher temperature of the used medium, the formed graphite ring can be used for replacing the ring seal, if the shape of the formed graphite ring is a V-shaped ring or a single-side trapezoid, the pressed deformation of the sealing property of the formed graphite ring is smaller, the axial seal of the valve seat and the valve body cannot be effectively ensured, and particularly, the leakage is easier to occur under the working conditions of high temperature and high pressure and low pressure. The axial section of the formed graphite ring 8 in the embodiment is trapezoidal, so that angle difference values are respectively arranged between two side walls (namely a first conical surface and a second conical surface) of the wedge-shaped graphite ring and inclined surfaces of the valve seat and the pressure ring, the graphite ring is easier to deform, the automatic compensation function of radial sealing of the graphite ring is enhanced, the wedge-shaped graphite ring can be sealed by very small pressing force, the no-load operation torque of the valve can be effectively reduced, the opening and closing process is more flexible, and the operation is stable. Meanwhile, the design also reduces the abrasion of the wedge-shaped graphite ring, prolongs the service life, particularly uses high-temperature and high-pressure working conditions and low-pressure sealing occasions, and simultaneously, the wedge-shaped graphite ring has large contact area with the valve body 1 and the valve cover 2, long fluid resistance and can better prevent medium leakage. Optimization, the trapezoid is an isosceles trapezoid, and the processing is more convenient. For example, the bottom angle of the two acute angles of the graphite ring ranges from 58 degrees to 62 degrees, and the included angle of the first included angle gap ranges from 2 degrees to 3 degrees.
The end of the medium channel has a step ring elevation, and the pressure spring 6 is positioned between the inner side of the step ring and the pressing ring 7. The installation and the cooperation of the pressure spring are convenient. The pressing ring is provided with a spring mounting hole, and the pressure spring adopts a cylindrical spring.
The pressing ring is matched with the valve body or the valve cover in an axial floating and guiding way, and the pressing ring is matched with the valve seat in an axial floating and guiding way. For example, the floating guide is matched with a step sliding floating guide.
An upper bearing 12 is arranged between the upper valve rod 5 and the upper valve rod seat 13, a middle bearing 11 is arranged between the upper valve rod 5 and the valve body 1, a lower bearing 10 is arranged between the lower valve rod 4 and the ball body, a packing 14 is arranged between the upper valve rod seat and the upper valve rod, a gland 15 is further arranged on the upper valve rod seat, the gland 5 is pressed on the packing 14, the gland and the upper valve rod are connected through a fastening piece (such as a bolt), and the fastening piece is provided with a disc spring 16. Through three bearing positioning, the force transmission between the ball body and the upper and lower valve rods is more stable, the opening and closing are flexible and smooth, and the blocking phenomenon is avoided. The 16 rows of the disc springs are additionally arranged for pre-tightening, so that the effective sealing of the packing is ensured, the medium is prevented from leaking outwards, the outward leakage caused by the loosening of the gland bolts or the loosening of the packing is avoided, and the effective sealing of the packing in long-term use is ensured. The lower valve rod can be fixed on the lower end cover, and the lower end cover is connected on the valve body.
Claims (6)
1. The utility model provides a fixed ball valve sealed firmly, including valve body (1), valve gap (2), go up valve rod seat (13), go up valve rod (5), lower valve rod (4) and spheroid (3), valve gap (2) are connected with valve body (1), it connects on valve body (1) to go up valve rod seat (13), spheroid (3) respectively with last valve rod, lower valve rod is connected, the spheroid sets up in the valve body, all be provided with medium channel on valve body (1) and valve gap (2), the spheroid is located between the medium channel of valve body and valve gap, the port department that links up between medium channel and the spheroid is equipped with disk seat sealing mechanism respectively, its characterized in that:
the valve seat sealing mechanism comprises a pressing ring (7), a graphite ring (8), a valve seat (9) and a pressure spring (6), the valve seat is matched with the ball body, the graphite ring (8) is arranged between the pressing ring (7) and the valve seat (9), the graphite ring (8) is sleeved on the circumferential surface part of the valve seat or the pressing ring, and the graphite ring (8) is clamped between the circumferential surface part and the inner wall of the port of the medium channel;
pressure spring (6) sets up between clamping ring and valve body or valve gap, pressure spring's elasticity sets up towards the spheroid direction, the axial cross-section of graphite ring (8) is trapezoidal, the graphite ring has first conical surface and second conical surface, the third conical surface has on the disk seat, the clamping ring has the fourth conical surface, first conical surface is relative with the third conical surface, form first contained angle clearance between first conical surface and the third conical surface, first contained angle clearance is outer big interior point, the second conical surface is relative with the fourth conical surface, form second contained angle clearance between second conical surface and the fourth conical surface, big outer point in the second contained angle clearance.
2. A hard seal seated ball valve as defined in claim 1, wherein: the end of the medium channel is provided with a step ring vertical surface, and the pressure spring is positioned between the inside of the step ring and the pressing ring.
3. A hard seal seated ball valve as defined in claim 2, wherein: the pressing ring is provided with a spring mounting hole, and the pressure spring adopts a cylindrical spring.
4. A hard seal seated ball valve as defined in claim 1, wherein: the pressing ring is matched with the valve body or the valve cover in an axial floating and guiding way, and the pressing ring is matched with the valve seat in an axial floating and guiding way.
5. A hard seal seated ball valve as defined in claim 1, wherein: an upper bearing is arranged between the upper valve rod and the upper valve rod seat, a middle bearing is arranged between the upper valve rod and the valve body, a lower bearing is arranged between the lower valve rod and the ball body, packing is arranged between the upper valve rod seat and the upper valve rod, a gland is further arranged on the upper valve rod seat and pressed on the packing, the gland is connected with the upper valve rod through a fastener, and the fastener is provided with a disc spring.
6. A hard seal seated ball valve as defined in claim 1, wherein: the trapezoid is an isosceles trapezoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021353958.6U CN213117571U (en) | 2020-07-11 | 2020-07-11 | Hard sealing fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021353958.6U CN213117571U (en) | 2020-07-11 | 2020-07-11 | Hard sealing fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213117571U true CN213117571U (en) | 2021-05-04 |
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ID=75676373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021353958.6U Active CN213117571U (en) | 2020-07-11 | 2020-07-11 | Hard sealing fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213117571U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001172A (en) * | 2021-11-17 | 2022-02-01 | 西诺威阀门控制（苏州）有限公司 | High-temperature metal sealing ball valve |
| CN114485354A (en) * | 2022-01-25 | 2022-05-13 | 江苏奕隆机电科技有限公司 | A method for accurately measuring the angle of the sealing cone surface of a solenoid valve seat |
| CN115126893A (en) * | 2022-07-01 | 2022-09-30 | 苏州华亘阀门有限公司 | Hard-seal fixed pneumatic ball valve for high-temperature working condition |
| CN117128333A (en) * | 2023-08-09 | 2023-11-28 | 中山铁王流体控制设备有限公司 | Ball valve for polycrystalline silicon with high sealing performance |
| CN119042356A (en) * | 2024-09-03 | 2024-11-29 | 慎江阀门有限公司 | Ultra-low temperature hard seal fixed ball valve |
-
2020
- 2020-07-11 CN CN202021353958.6U patent/CN213117571U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001172A (en) * | 2021-11-17 | 2022-02-01 | 西诺威阀门控制（苏州）有限公司 | High-temperature metal sealing ball valve |
| CN114485354A (en) * | 2022-01-25 | 2022-05-13 | 江苏奕隆机电科技有限公司 | A method for accurately measuring the angle of the sealing cone surface of a solenoid valve seat |
| CN115126893A (en) * | 2022-07-01 | 2022-09-30 | 苏州华亘阀门有限公司 | Hard-seal fixed pneumatic ball valve for high-temperature working condition |
| CN117128333A (en) * | 2023-08-09 | 2023-11-28 | 中山铁王流体控制设备有限公司 | Ball valve for polycrystalline silicon with high sealing performance |
| CN117128333B (en) * | 2023-08-09 | 2024-03-29 | 中山铁王流体控制设备有限公司 | Ball valve for polycrystalline silicon with high sealing performance |
| CN119042356A (en) * | 2024-09-03 | 2024-11-29 | 慎江阀门有限公司 | Ultra-low temperature hard seal fixed ball valve |
| CN119042356B (en) * | 2024-09-03 | 2025-04-11 | 慎江阀门有限公司 | An ultra-low temperature hard-sealed fixed ball valve |
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