CN114087392A - Valve seat structure of large-specification upper-mounting type fixed ball valve - Google Patents
Valve seat structure of large-specification upper-mounting type fixed ball valve Download PDFInfo
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- CN114087392A CN114087392A CN202111605778.1A CN202111605778A CN114087392A CN 114087392 A CN114087392 A CN 114087392A CN 202111605778 A CN202111605778 A CN 202111605778A CN 114087392 A CN114087392 A CN 114087392A
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- Prior art keywords
- valve
- valve seat
- sealing ring
- ball
- spring
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- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 84
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 28
- 239000010439 graphite Substances 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/061—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor knee-joint
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0626—Easy mounting or dismounting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention provides a valve seat structure of a large-size upper-mounted fixed ball valve, which comprises: the valve body is internally provided with a ball body; the valve seat holes are formed in the valve body on two sides of the ball body, and valve seat devices are installed in the valve seat holes; the valve seat device comprises a valve seat body, a main sealing ring and a flexible graphite fireproof sealing ring, wherein the main sealing ring and the flexible graphite fireproof sealing ring are respectively positioned at two ends of the valve seat body, and a spring box is sleeved outside the valve seat body; the valve body sealing surface is positioned in the valve seat hole, and an O-shaped sealing ring and a flexible graphite fireproof sealing ring are arranged between the valve body sealing surface and the valve seat body; and the valve rod penetrates through the top of the valve body. The invention solves the problems that the installation is difficult due to large compression amount of the spring during the assembly, and the sealing performance of the ball is influenced because the sealing medium between the ball and the valve seat is easy to wear in order to overcome the resistance of the spring.
Description
Technical Field
The invention relates to the technical field related to valve seat sealing, in particular to a valve seat structure of a large-size upper-mounted fixed ball valve.
Background
The upper-mounted ball valve is divided into a floating ball valve and a fixed ball valve, when a fault occurs and the repair is needed, the valve does not need to be disassembled from a pipeline, the ball body and the valve seat can be repaired on line by disassembling the valve cover and the valve rod assembly and then taking out the ball body and the valve seat assembly, and the upper-mounted ball valve is widely applied to petroleum and natural gas pipelines and devices for oil extraction, oil refining, petrochemical industry, chemical fiber, metallurgy, electric power, nuclear power, food, paper making and the like.
In the prior art, when the top-mounted fixed ball valve is assembled, the compression amount of a spring is large, so that the ball body is difficult to mount, and in order to overcome the resistance of the spring during assembly, a sealing medium between the ball body and a valve seat is easy to wear, so that the sealing performance of the ball body is influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, a valve seat structure of a large-specification top-mounted fixed ball valve is provided, so that the problems that in the prior art, the compression amount of a spring is large, a ball body is difficult to mount, and in order to overcome the resistance of the spring in assembly, a sealing medium between the ball body and a valve seat is easy to wear, so that the sealing performance of the ball body is influenced are solved.
In order to achieve the above object, there is provided a valve seat structure of a large-specification top-loading type fixed ball valve, comprising:
the valve body is internally provided with a ball body;
the valve seat holes are formed in the valve body on two sides of the ball body, and valve seat devices are installed in the valve seat holes;
the valve seat device comprises a valve seat body, a main sealing ring and a flexible graphite fireproof sealing ring, wherein the main sealing ring and the flexible graphite fireproof sealing ring are respectively positioned at two ends of the valve seat body;
the valve body sealing surface is positioned in the valve seat hole, and an O-shaped sealing ring and a flexible graphite fireproof sealing ring are arranged between the valve body sealing surface and the valve seat body;
the valve rod penetrates through the top of the valve body, one end of the valve rod is connected with the ball body, and the other end of the valve rod is connected with a driving device.
Furthermore, the inner wall of the valve body at the valve seat hole is in a step shape, and the aperture of the valve seat hole is gradually reduced from inside to outside.
Further, the contact surface between the valve seat device and the valve body is the valve body sealing surface.
Further, the main seal circle is located the spheroid with between the valve seat body, the main seal circle with spheroid area of contact is less than the main seal circle with valve seat body area of contact, the spheroid the main seal circle with the valve seat body constitutes seal structure.
Further, the valve seat device further comprises an elastic check ring, the elastic check ring is embedded in the outer wall of the valve seat body, one side end face of the elastic check ring is abutted to the spring box, and the elastic check ring is close to the main sealing ring.
Furthermore, the valve seat device also comprises a spring, wherein the spring is divided into two sections, one section of the spring is arranged in the spring box, the other section of the spring is fixed on the valve body, the two sections of the spring are opposite, and a gap is reserved between the two sections of the spring.
Further, set up the annular groove on the lateral surface of valve seat body, circlip, O type sealing washer and flexible graphite fire prevention sealing washer are located respectively in the recess of difference, O type sealing washer is close to flexible graphite fire prevention sealing washer, O type sealing washer with flexible graphite fire prevention sealing washer meets with adjacent ladder face respectively.
The valve seat structure of the large-specification top-mounted fixed ball valve has the beneficial effects that the valve seat structure of the large-specification top-mounted fixed ball valve is designed by utilizing the sectional type spring, and a gap is reserved between two sections of springs, so that the compression amount of the springs during assembly is reduced, the assembly of a ball body is facilitated, the situations that the assembly is difficult and the sealing performance is influenced are avoided, the sealing combination is realized by utilizing the main sealing ring and the ball body, the sealing combination is realized by utilizing the flexible graphite fireproof sealing ring and the O-shaped sealing ring, the sealing surface of the valve body and the valve seat body, and the sealing effect of the valve seat device is enhanced.
Drawings
FIG. 1 is a schematic front view of a cross-sectional structure according to an embodiment of the present invention;
fig. 2 is an enlarged structural schematic view of a valve seat device according to an embodiment of the invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a valve body; 2. a sphere; 3. a valve seat bore; 4. a valve seat means; 5. a valve body sealing surface; 6. a valve stem; 41. a primary seal ring; 42. a circlip; 43. a spring box; 44. a spring; 45. an O-shaped sealing ring; 46. a valve seat body; 47. flexible graphite fire prevention sealing washer.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 2, the present invention provides a valve seat structure of a large-sized top-loading type fixed ball valve, including: valve body 1, spheroid 2, valve seat hole 3, valve seat device 4, valve body sealing surface 5 and valve rod 6.
Specifically, a ball body 2 is arranged inside the valve body 1 and the valve body 1;
the valve seat holes 3 are arranged on the valve body 1 at two sides of the ball body 2, and the valve seat device 4 is arranged in the valve seat holes 3;
the valve seat device 4, the valve seat device 4 includes the valve seat body 46, main seal 41 and flexible graphite fire-proof seal 47, the main seal 41 and flexible graphite fire-proof seal 47 locate at both ends of the valve seat body 46 separately, the outside of the valve seat body 46 is fitted with the spring box 43, the sealing surface of the main seal 41 contacts with spheroid 2, the outer annular surface of the flexible graphite fire-proof seal 47 is supported and connected on the inner wall of the valve block 1;
the valve body sealing surface 5 is positioned in the valve seat hole 3, and an O-shaped sealing ring 45 and a flexible graphite fireproof sealing ring 47 are arranged between the valve body sealing surface 5 and the valve seat body 46;
When assembling the valve seat structure of the large-specification top-mounted fixed ball valve, the flexible graphite fireproof sealing ring 47, the O-shaped sealing ring 45 and the main sealing ring 41 are mounted on the corresponding position of the valve seat body 46, the spring box 43 with a section of spring 44 is sleeved on the valve seat body 46, the elastic retainer ring 42 is mounted at the joint of the spring box 43 and the valve seat body 46, the elastic retainer ring 42 prevents the axial movement of the spring box 43, the other section of spring 44 is fixed on the inner wall of the valve body 1, then the valve seat body 46 is mounted in the valve body 1, the outer ring surfaces of the flexible graphite fireproof sealing ring 47 and the O-shaped sealing ring 45 are contacted with the inner wall of the valve body 1, so that the two sections of springs 44 are positioned on the same straight line, the valve seat body 46 is continuously pushed outwards, the distance between the springs 44 is reduced, when the springs 44 are connected, the springs 44 interact with each other, the springs 44 are compressed, at the moment, the ball 2 is mounted in the valve body 1, after the mounting is completed, the spring 44 is not pressed by external force, and the two sections of springs 44 are restored to be deformed.
In the present embodiment, as shown in fig. 1 and 2, the inner wall of the valve body 1 in the valve seat hole 3 is stepped, the diameter of the valve seat hole 3 is gradually reduced from inside to outside, and the stepped structure is adapted to the valve seat body 46 to prevent the valve seat body 46 from moving in the axial direction.
In the present embodiment, the contact surfaces of the valve seat device 4 and the valve body 1 are a valve body sealing surface 5 and a valve body sealing surface 5.
In the present embodiment, as shown in fig. 1 and 2, the main seal 41 is located between the ball 2 and the valve seat body 46, the contact area between the main seal 41 and the ball 2 is smaller than the contact area between the main seal 41 and the valve seat body 46, the ball 2, the main seal 41, and the valve seat body 46 constitute a seal structure, the valve seat body 46 semi-surrounds the main seal 41, the contact area between the main seal 41 and the ball 2 is smaller, the acting force of the ball 2 on the main seal 41 is small, and the degree of wear of the main seal 41 is prevented from increasing due to the assembly and rotation of the ball 2.
In the present embodiment, as shown in fig. 1 and 2, the valve seat device 4 further includes a circlip 42, the circlip 42 is embedded in the outer wall of the valve seat body 46, one end surface of the circlip 42 abuts against the spring box 43, the circlip 42 is close to the main seal 41, and the circlip 42 is used for blocking the movement of the spring box 43.
In the present embodiment, as shown in fig. 2, the valve seat apparatus 4 further includes a spring 44, the spring 44 is divided into two sections, one section of the spring 44 is installed in the spring box 43, the other section of the spring 44 is fixed on the valve body 1, the two sections of the spring 44 are opposite, and a gap is left between the two sections of the spring 44, so that the amount of compression of the spring 44 required during assembly is effectively reduced, the resistance of the spring 44 required to be overcome is reduced, and the function of facilitating assembly is realized.
In this embodiment, as shown in fig. 2, an annular groove is formed on the outer side surface of the valve seat body 46, the elastic collar 42, the O-shaped sealing ring 45 and the flexible graphite fireproof sealing ring 47 are respectively disposed in different grooves, the O-shaped sealing ring 45 is close to the flexible graphite fireproof sealing ring 47, the O-shaped sealing ring 45 and the flexible graphite fireproof sealing ring 47 are respectively connected with adjacent stepped surfaces, and the flexible graphite fireproof sealing ring 47 prevents the O-shaped sealing ring 45 from failing under a high temperature condition, so as to ensure the sealing performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a disk seat structure of fixed ball valve of big specification upper assembling formula which characterized in that includes:
the valve comprises a valve body (1), wherein a ball body (2) is arranged inside the valve body (1);
the valve seat hole (3) is formed in the valve body (1) on two sides of the ball body (2), and a valve seat device (4) is installed in the valve seat hole (3);
the valve seat device (4), the valve seat device (4) comprises a valve seat body (46), a main sealing ring (41) and a flexible graphite fireproof sealing ring (47), the main sealing ring (41) and the flexible graphite fireproof sealing ring (47) are respectively positioned at two ends of the valve seat body (46), a spring box (43) is sleeved outside the valve seat body (46), a sealing surface of the main sealing ring (41) is in contact with the ball body (2), and an outer annular surface of the flexible graphite fireproof sealing ring (47) is abutted to the inner wall of the valve body (1);
the valve body sealing surface (5) is positioned in the valve seat hole (3), and an O-shaped sealing ring (45) and a flexible graphite fireproof sealing ring (47) are arranged between the valve body sealing surface (5) and the valve seat body (46);
the valve rod (6) penetrates through the top of the valve body (1), one end of the valve rod (6) is connected with the ball body (2), and the other end of the valve rod (6) is connected with a driving device.
2. The valve seat structure of a large-specification top-loading type fixed ball valve according to claim 1, wherein the inner wall of the valve body (1) at the valve seat hole (3) is stepped, and the diameter of the valve seat hole (3) is gradually reduced from inside to outside.
3. A seat structure for a large format top-loading globe valve according to claim 1, wherein the contact surface of the seat means (4) and the valve body (1) is the valve body sealing surface (5).
4. The valve seat structure of a large-specification top-loading type fixed ball valve according to claim 1, wherein the main seal ring (41) is located between the ball body (2) and the valve seat body (46), the contact area of the main seal ring (41) and the ball body (2) is smaller than that of the main seal ring (41) and the valve seat body (46), and the ball body (2), the main seal ring (41) and the valve seat body (46) constitute a sealing structure.
5. The valve seat structure of the large-specification top-loading type fixed ball valve according to claim 1, wherein the valve seat device (4) further comprises a circlip (42), the circlip (42) is embedded on the outer wall of the valve seat body (46), one side end face of the circlip (42) abuts against the spring box (43), and the circlip (42) is close to the main sealing ring (41).
6. A seat structure for a large format top loading globe valve according to claim 1, wherein the seat means (4) further comprises a spring (44), the spring (44) is divided into two segments, one segment (44) of the spring being mounted in the spring housing (43) and the other segment (44) of the spring being fixed to the valve body (1), the two segments (44) of the spring being in a normal opposition with a gap between the two segments (44).
7. The valve seat structure of a large-specification top-loading type fixed ball valve according to claim 1, wherein an annular groove is formed in the outer side surface of the valve seat body (46), the elastic check ring (42), the O-shaped sealing ring (45) and the flexible graphite fireproof sealing ring (47) are respectively arranged in different grooves, the O-shaped sealing ring (45) is close to the flexible graphite fireproof sealing ring (47), and the O-shaped sealing ring (45) and the flexible graphite fireproof sealing ring (47) are respectively connected with adjacent stepped surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111605778.1A CN114087392A (en) | 2021-12-25 | 2021-12-25 | Valve seat structure of large-specification upper-mounting type fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111605778.1A CN114087392A (en) | 2021-12-25 | 2021-12-25 | Valve seat structure of large-specification upper-mounting type fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114087392A true CN114087392A (en) | 2022-02-25 |
Family
ID=80307926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111605778.1A Pending CN114087392A (en) | 2021-12-25 | 2021-12-25 | Valve seat structure of large-specification upper-mounting type fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114087392A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629387A (en) * | 2012-08-29 | 2014-03-12 | 昆山维萨阀门有限公司 | Large-caliber upwardly-installed fixed ball valve |
| CN205824255U (en) * | 2016-07-28 | 2016-12-21 | 自贡自高阀门有限公司 | Dress formula fixing ball valve in one |
-
2021
- 2021-12-25 CN CN202111605778.1A patent/CN114087392A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629387A (en) * | 2012-08-29 | 2014-03-12 | 昆山维萨阀门有限公司 | Large-caliber upwardly-installed fixed ball valve |
| CN205824255U (en) * | 2016-07-28 | 2016-12-21 | 自贡自高阀门有限公司 | Dress formula fixing ball valve in one |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220225 |
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| RJ01 | Rejection of invention patent application after publication |