CN108980398B - Double-sealing ball valve seat with compact structure - Google Patents
Double-sealing ball valve seat with compact structure Download PDFInfo
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- CN108980398B CN108980398B CN201811101331.9A CN201811101331A CN108980398B CN 108980398 B CN108980398 B CN 108980398B CN 201811101331 A CN201811101331 A CN 201811101331A CN 108980398 B CN108980398 B CN 108980398B
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- valve seat
- sealing
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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
- F16K5/0684—Packings on the 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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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
-
- 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
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a double-seal ball valve seat with a compact structure, which belongs to the technical field of ball valves and is characterized in that: comprises a valve body with a channel, a ball body arranged in the valve body and a limit ring; the inner wall of the channel is provided with an outer valve seat and an inner valve seat which are positioned between the ball body and the valve body, and the outer valve seat is arranged at one end of the inner valve seat close to the ball body; one end of the outer valve seat is abutted against the ball body to form a hard sealing surface, and the other end of the outer valve seat is abutted against the end face of the inner valve seat; the outer valve seat is provided with a circumferential bulge, one end of the limiting ring is clamped on the bulge to limit the axial displacement of the inner valve seat, and the other end of the limiting ring is fixedly connected with the inner valve seat. The invention has the beneficial effects that: the double sealing structure of the inner valve seat and the outer valve seat is adopted, so that the sealing reliability is ensured, and the sealing performance is better; and the outer valve seat is fixed by the limiting ring, so that the structure is compact, the volume of the outer valve seat is greatly saved, the manufacturing cost is reduced, the disassembly and the assembly are convenient, and the later maintenance is facilitated.
Description
Technical Field
The invention relates to the technical field of ball valves, in particular to a double-seal ball valve seat with a compact structure.
Background
Ball valves are a very common technology, are commonly used in industries such as petroleum refining, long-distance pipelines, chemical industry, paper making, medicine preparation, water conservancy, electric power, municipal administration, steel and the like, and are used for cutting off or connecting media in pipelines.
After the ball valve is installed on a pipeline, the leakage condition of the ball valve needs to be detected at regular time, but the leakage condition can only be detected at present, and a real-time effective correction and detection means is lacked for the inner leakage of the ball valve. This is because the ball valve has upper and lower disk seat twice and seals, and the condition of revealing of upper valve seat can only detect its condition of revealing through releasing pressure at the lumen, and at this in-process, the ball valve is in the totally-closed state, need guarantee that the lumen does not have remaining medium, if the upper valve seat reveals, the medium of lumen is arranged unclean, needs very long time to detect to can waste a large amount of media, cause pollution and waste. When a downstream valve seat is detected, the ball valve is in a fully closed state, the leakage condition of the downstream of the ball valve is detected, and the bad point is two points: firstly, the downstream medium needs to be removed, and the time is long; secondly, the detection is inaccurate, as long as the upper valve seat does not lose efficacy, the whole ball valve cannot leak, and at the moment, whether the lower valve seat leaks or not cannot be detected.
The common pipeline ball valve has low requirement on internal leakage, but in metering stations and other occasions, particularly in metering stations containing more impurities, the ball valve is required to have zero internal leakage and strong wear resistance, the existing valve is sealed by an O-shaped sealing ring and is easy to damage, and a sealing structure is usually arranged between a valve seat and a ball body, so that leakage can be generated once the sealing structure is damaged, the sealing is unreliable, and the existing structure can hardly meet the requirement; and current ball valve adopts double-seat to seal in order to guarantee sealed reliability often, but double-seat structure is complicated, and outer valve seat structure is unanimous with interior disk seat, all supports and leans on the valve body, consumes raw and other materials many, does not accord with energy-conserving green manufacturing theory, to above-mentioned problem, this application has proposed solution.
Disclosure of Invention
In order to solve the technical problems, the invention adopts a technical scheme that: the double-seal ball valve seat with the compact structure solves the technical problems of high manufacturing cost and complex structure.
The purpose of the invention is realized by the following technical scheme: the utility model provides a compact structure's double seal ball valve disk seat which characterized in that: comprises a valve body with a channel, a ball body arranged in the valve body and a limit ring; the inner wall of the channel is provided with an outer valve seat and an inner valve seat which are positioned between the ball body and the valve body, and the outer valve seat is arranged at one end of the inner valve seat close to the ball body; one end of the outer valve seat is abutted against the ball body to form a hard sealing surface, and the other end of the outer valve seat is abutted against the end face of the inner valve seat; the outer valve seat is provided with a circumferential bulge, one end of the limiting ring is clamped on the bulge to limit the axial displacement of the inner valve seat, and the other end of the limiting ring is fixedly connected with the inner valve seat.
Preferably, a sealing ring is arranged between one end of the inner valve seat and the ball body, the end face of the sealing ring is a soft sealing face, and an inner sealing cavity is formed between the other end of the sealing ring and the valve body.
Preferably, a pre-tightening sealing mechanism is arranged in the inner sealing cavity and comprises a spring, a clamping ring and a filler which are sequentially arranged, the clamping ring is arranged between the spring and the filler, and the filler is arranged between the valve body and the inner valve seat.
Preferably, a first sealing ring and a second sealing ring are arranged between the inner valve seat and the valve body; the pre-tightening sealing mechanism is arranged between the first sealing ring and the second sealing ring.
Preferably, the outer valve seat is provided with a leakage detection hole positioned between the hard sealing surface and the soft sealing surface, one end of the leakage detection hole is arranged between the soft sealing surface and the hard sealing surface, and the other end of the leakage detection hole is arranged between the first sealing ring and the second sealing ring; the valve body is provided with an observation hole communicated with the leak detection hole; and a blocking device is arranged on the observation hole.
Preferably, the leakage detecting hole is provided in plurality along a circumferential direction of the outer valve seat.
Preferably, the plugging device is a plug or a grease injection valve.
Preferably, the hard sealing surface is coated with cemented carbide.
Preferably, a third sealing ring is arranged between the outer valve seat and the inner valve seat, and the third sealing ring is arranged on the end face of the inner valve seat.
Preferably, the limiting ring is fixedly connected with the inner valve seat through threads.
The invention has the beneficial effects that:
firstly, an inner valve seat and an outer valve seat are in a double-sealing structure, so that the sealing reliability is ensured, and the sealing performance is better; and the outer valve seat is fixed by the limiting ring, so that the structure is compact, the volume of the outer valve seat is greatly saved, the manufacturing cost is reduced, the disassembly and the assembly are convenient, and the later maintenance is facilitated.
If the hard sealing surface and the soft sealing surface are well sealed, the medium cannot flow into the leakage detection hole, namely cannot seep out of the observation hole, and if one or two of the sealing surfaces fail, the medium can enter the leakage detection hole and then seep out of the observation hole; when the ball valve detects internal leakage, the plug is taken out, whether a medium seeps out or not is observed through the observation hole, if the medium seeps out, the ball valve generates the internal leakage, and the maintenance is needed in time; if no medium seeps out, the sealing is tight and no inner leakage exists. The detection method is simple and reliable, is easy to operate, and realizes the online leak detection function.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a detail view of section A of FIG. 1;
in the figure: 1-valve body, 2-channel, 3-ball, 4-outer valve seat, 5-inner valve seat, 6-hard sealing surface, 7-filler, 8-snap ring, 9-spring, 10-sealing ring, 11-soft sealing surface, 12-leak hole, 13-observation hole, 14-blocking device, 15-first sealing ring, 16-second sealing ring, 17-limiting ring, and 18-third sealing ring.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
The first embodiment:
as shown in fig. 1-2, a double-sealing ball valve seat with compact structure is characterized in that: comprises a valve body 1 with a channel 2, a ball body 3 arranged in the valve body 1 and a limit ring 17; an outer valve seat 4 and an inner valve seat 5 which are positioned between the ball body 3 and the valve body 1 are arranged on the inner wall of the channel 2, and the outer valve seat 4 is arranged at one end of the inner valve seat 5 close to the ball body 3; one end of the outer valve seat 4 is abutted against the ball 3 to form a hard sealing surface 6, and the other end of the outer valve seat is abutted against the end surface of the inner valve seat 5; the outer valve seat 4 is provided with a circumferential bulge, one end of the limiting ring 17 is clamped on the bulge to limit the axial displacement of the inner valve seat 5, and the other end of the limiting ring is fixedly connected with the inner valve seat 5.
The double sealing structure of the inner valve seat 5 and the outer valve seat 4 is adopted, so that the sealing reliability is ensured, and the sealing performance is better; and the outer valve seat 4 is fixed on the outer valve seat 4 through the limiting ring 17, the structure is compact, the volume of the outer valve seat 4 is greatly saved, the manufacturing cost is reduced, the disassembly and the assembly are convenient, and the later maintenance is facilitated.
Second embodiment:
as shown in fig. 1-2, a double-sealing ball valve seat with compact structure is characterized in that: comprises a valve body 1 with a channel 2, a ball body 3 arranged in the valve body 1 and a limit ring 17; an outer valve seat 4 and an inner valve seat 5 which are positioned between the ball body 3 and the valve body 1 are arranged on the inner wall of the channel 2, and the outer valve seat 4 is arranged at one end of the inner valve seat 5 close to the ball body 3; one end of the outer valve seat 4 is abutted against the ball 3 to form a hard sealing surface 6, and the other end of the outer valve seat is abutted against the end surface of the inner valve seat 5; the outer valve seat 4 is provided with a circumferential bulge, one end of the limiting ring 17 is clamped on the bulge to limit the axial displacement of the inner valve seat 5, and the other end of the limiting ring is fixedly connected with the inner valve seat 5.
A sealing ring 10 is arranged between one end of the inner valve seat 5 and the ball body 3, the end surface of the sealing ring 10 is a soft sealing surface 11, and an inner sealing cavity is formed between the other end of the sealing ring and the valve body 1; a pre-tightening sealing mechanism is arranged in the inner sealing cavity and comprises a spring 9, a clamping ring 8 and a filler 7 which are sequentially arranged, the clamping ring 8 is arranged between the spring 9 and the filler 7, and the filler 7 is arranged between the valve body 1 and the inner valve seat 5; a first sealing ring 10 and a second sealing ring 10 are arranged between the inner valve seat 5 and the valve body 1; the pre-tensioned sealing mechanism is arranged between the first sealing ring 15 and the second sealing ring 16.
The third embodiment:
as shown in fig. 1-2, a double-sealing ball valve seat with compact structure is characterized in that: comprises a valve body 1 with a channel 2, a ball body 3 arranged in the valve body 1 and a limit ring 17; an outer valve seat 4 and an inner valve seat 5 which are positioned between the ball body 3 and the valve body 1 are arranged on the inner wall of the channel 2, and the outer valve seat 4 is arranged at one end of the inner valve seat 5 close to the ball body 3; one end of the outer valve seat 4 is abutted against the ball 3 to form a hard sealing surface 6, and the other end of the outer valve seat is abutted against the end surface of the inner valve seat 5; the outer valve seat 4 is provided with a circumferential bulge, one end of the limiting ring 17 is clamped on the bulge to limit the axial displacement of the inner valve seat 5, and the other end of the limiting ring is fixedly connected with the inner valve seat 5.
A sealing ring 10 is arranged between one end of the inner valve seat 5 and the ball body 3, the end surface of the sealing ring 10 is a soft sealing surface 11, and an inner sealing cavity is formed between the other end of the sealing ring and the valve body 1; a pre-tightening sealing mechanism is arranged in the inner sealing cavity and comprises a spring 9, a clamping ring 8 and a filler 7 which are sequentially arranged, the clamping ring 8 is arranged between the spring 9 and the filler 7, and the filler 7 is arranged between the valve body 1 and the inner valve seat 5; a first sealing ring 10 and a second sealing ring 10 are arranged between the inner valve seat 5 and the valve body 1; the pre-tensioned sealing mechanism is arranged between the first sealing ring 15 and the second sealing ring 16.
The outer valve seat 4 is provided with a leak detection hole 12 positioned between the hard sealing surface 6 and the soft sealing surface 11, one end of the leak detection hole 12 is arranged between the soft sealing surface 11 and the hard sealing surface 6, and the other end is arranged between the first sealing ring 15 and the second sealing ring 16; the valve body 1 is provided with an observation hole 13 communicated with the leak detection hole 12; the observation hole 13 is provided with a blocking device 14.
The plurality of leak detection holes 12 are provided along the circumferential direction of the outer valve seat 4.
If the hard sealing surface 6 and the soft sealing surface 11 are well sealed, the medium cannot flow into the leakage detection hole 12, namely cannot seep out of the observation hole 13, and if one or two of the sealing surfaces fail, the medium can enter the leakage detection hole 12 and then seep out of the observation hole 13; when the ball valve detects internal leakage, the plug is taken out, whether a medium seeps out or not is observed through the observation hole 13, if the medium seeps out, the ball valve generates internal leakage, and the maintenance is needed in time; if no medium seeps out, the sealing is tight and no inner leakage exists. The detection method is simple and reliable and is easy to operate.
The upper valve seat assembly and the lower valve seat assembly of the ball valve can adopt the structure, and a medium flows from upstream to downstream; during online detection, the leakage condition of the upper valve seat assembly can be detected through the observation hole 13 only by placing the ball valve in a fully closed state, but at the moment, whether the ball valve generates internal leakage or not can only be determined, and which ball valve generates leakage cannot be determined, because if the upper valve seat assembly is well sealed, no medium passes through the lower valve seat assembly, and the leakage condition of the lower valve seat assembly cannot be detected; at the moment, the ball valve can be completely closed, a medium is injected from the middle cavity of the ball valve, the medium flows to the upper end and the lower end, and the sealing performance of the upper valve seat assembly and the lower valve seat assembly can be detected simultaneously. Fig. 1-2 show the structure of the lower valve seat assembly, the structure of the upper valve seat assembly is identical and the lower valve seat assembly is symmetrically arranged.
The fourth embodiment:
as shown in fig. 1-2, a double-sealing ball valve seat with compact structure is characterized in that: comprises a valve body 1 with a channel 2, a ball body 3 arranged in the valve body 1 and a limit ring 17; an outer valve seat 4 and an inner valve seat 5 which are positioned between the ball body 3 and the valve body 1 are arranged on the inner wall of the channel 2, and the outer valve seat 4 is arranged at one end of the inner valve seat 5 close to the ball body 3; one end of the outer valve seat 4 is abutted against the ball 3 to form a hard sealing surface 6, and the other end of the outer valve seat is abutted against the end surface of the inner valve seat 5; the outer valve seat 4 is provided with a circumferential bulge, one end of the limiting ring 17 is clamped on the bulge to limit the axial displacement of the inner valve seat 5, and the other end of the limiting ring is fixedly connected with the inner valve seat 5.
A sealing ring 10 is arranged between one end of the inner valve seat 5 and the ball body 3, the end surface of the sealing ring 10 is a soft sealing surface 11, and an inner sealing cavity is formed between the other end of the sealing ring and the valve body 1; a pre-tightening sealing mechanism is arranged in the inner sealing cavity and comprises a spring 9, a clamping ring 8 and a filler 7 which are sequentially arranged, the clamping ring 8 is arranged between the spring 9 and the filler 7, and the filler 7 is arranged between the valve body 1 and the inner valve seat 5; a first sealing ring 10 and a second sealing ring 10 are arranged between the inner valve seat 5 and the valve body 1; the pre-tensioned sealing mechanism is arranged between the first sealing ring 15 and the second sealing ring 16.
The outer valve seat 4 is provided with a leak detection hole 12 positioned between the hard sealing surface 6 and the soft sealing surface 11, one end of the leak detection hole 12 is arranged between the soft sealing surface 11 and the hard sealing surface 6, and the other end is arranged between the first sealing ring 15 and the second sealing ring 16; the valve body 1 is provided with an observation hole 13 communicated with the leak detection hole 12; the observation hole 13 is provided with a blocking device 14.
The plurality of leak detection holes 12 are provided along the circumferential direction of the outer valve seat 4.
If the hard sealing surface 6 and the soft sealing surface 11 are well sealed, the medium cannot flow into the leakage detection hole 12, namely cannot seep out of the observation hole 13, and if one or two of the sealing surfaces fail, the medium can enter the leakage detection hole 12 and then seep out of the observation hole 13; when the ball valve detects internal leakage, the plug is taken out, whether a medium seeps out or not is observed through the observation hole 13, if the medium seeps out, the ball valve generates internal leakage, and the maintenance is needed in time; if no medium seeps out, the sealing is tight and no inner leakage exists. The detection method is simple and reliable and is easy to operate.
The upper valve seat assembly and the lower valve seat assembly of the ball valve can adopt the structure, and a medium flows from upstream to downstream; during online detection, the leakage condition of the upper valve seat assembly can be detected through the observation hole 13 only by placing the ball valve in a fully closed state, but at the moment, whether the ball valve generates internal leakage or not can only be determined, and which ball valve generates leakage cannot be determined, because if the upper valve seat assembly is well sealed, no medium passes through the lower valve seat assembly, and the leakage condition of the lower valve seat assembly cannot be detected; at the moment, the ball valve can be completely closed, a medium is injected from the middle cavity of the ball valve, the medium flows to the upper end and the lower end, and the sealing performance of the upper valve seat assembly and the lower valve seat assembly can be detected simultaneously. Fig. 1-2 show the structure of the lower valve seat assembly, the structure of the upper valve seat assembly is identical and the lower valve seat assembly is symmetrically arranged.
The plugging device 14 is a plug or a grease injection valve. When the plug is adopted, only a simple blocking effect is achieved; when the ester injection valve is adopted, the blocking function is realized, and the emergency grease injection valve can also be used for emergency grease injection; generally, in order to ensure the function of detecting internal leakage of the ball valve, sealing grease cannot be injected into a sealing surface, but in an emergency situation, for example, toxic and harmful gas leakage can cause casualties or environmental pollution, and at the moment, the sealing grease can be injected between the ball body 3 and the valve seat through the grease injection valve to play a role of emergency sealing.
And hard alloy is sprayed on the hard sealing surface 6. The wear resistance is improved.
And a third sealing ring 18 is arranged between the outer valve seat 4 and the inner valve seat 5, and the third sealing ring 18 is arranged on the end surface of the inner valve seat 5.
The limiting ring 17 is fixedly connected with the inner valve seat 5 through threads.
The spring 9 is a disc spring. Compared with a spiral spring, the anti-jamming performance is better.
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 present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the spirit and principle of the present invention and that equivalent modifications and substitutions and the like are included in the scope of the present invention.
Claims (9)
1. The utility model provides a compact structure's double seal ball valve disk seat which characterized in that: comprises a valve body with a channel, a ball body arranged in the valve body and a limit ring; the inner wall of the channel is provided with an outer valve seat and an inner valve seat which are positioned between the ball body and the valve body, and the outer valve seat is arranged at one end of the inner valve seat close to the ball body; one end of the outer valve seat is abutted against the ball body to form a hard sealing surface, and the other end of the outer valve seat is abutted against the end face of the inner valve seat; the outer valve seat is provided with a circumferential bulge, one end of the limiting ring is clamped on the bulge to limit the axial displacement of the inner valve seat, and the other end of the limiting ring is fixedly connected with the inner valve seat; a sealing ring is arranged between one end of the inner valve seat and the ball body, the end face of the sealing ring is a soft sealing face, and an inner sealing cavity is formed between the other end of the sealing ring and the valve body.
2. The compact, double-seal ball valve seat as defined in claim 1, wherein: the inner sealing cavity is internally provided with a pre-tightening sealing mechanism, the pre-tightening sealing mechanism comprises a spring, a clamping ring and a filler which are sequentially arranged, the clamping ring is arranged between the spring and the filler, and the filler is arranged between the valve body and the inner valve seat.
3. The compact, double-seal ball valve seat as defined in claim 2, wherein: a first sealing ring and a second sealing ring are arranged between the inner valve seat and the valve body; the pre-tightening sealing mechanism is arranged between the first sealing ring and the second sealing ring.
4. A compact, double-sealing ball valve seat as defined in claim 3, wherein: the outer valve seat is provided with a leak detection hole positioned between the hard sealing surface and the soft sealing surface, one end of the leak detection hole is arranged between the soft sealing surface and the hard sealing surface, and the other end of the leak detection hole is arranged between the first sealing ring and the second sealing ring; the valve body is provided with an observation hole communicated with the leak detection hole; and a blocking device is arranged on the observation hole.
5. The compact, double-seal ball valve seat as defined in claim 4, wherein: the leakage detection holes are arranged in a plurality along the circumferential direction of the outer valve seat.
6. The compact, double-seal ball valve seat as defined in claim 4, wherein: the plugging device is a plug or a grease injection valve.
7. The double-seal ball valve seat with a compact structure as claimed in any one of claims 1 to 6, wherein: and hard alloy is sprayed on the hard sealing surface.
8. The compact, double-seal ball valve seat as defined in claim 7, wherein: and a third sealing ring is arranged between the outer valve seat and the inner valve seat, and the third sealing ring is arranged on the end surface of the inner valve seat.
9. The compact, double-seal ball valve seat as defined in claim 8, wherein: the limiting ring is fixedly connected with the inner valve seat through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101331.9A CN108980398B (en) | 2018-09-20 | 2018-09-20 | Double-sealing ball valve seat with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101331.9A CN108980398B (en) | 2018-09-20 | 2018-09-20 | Double-sealing ball valve seat with compact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108980398A CN108980398A (en) | 2018-12-11 |
| CN108980398B true CN108980398B (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811101331.9A Active CN108980398B (en) | 2018-09-20 | 2018-09-20 | Double-sealing ball valve seat with compact structure |
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| CN (1) | CN108980398B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240409B (en) * | 2020-09-09 | 2023-04-11 | 科科集团有限公司 | Ball valve |
| CN112240408B (en) * | 2020-09-09 | 2022-12-23 | 科科集团有限公司 | Conical oblique cutting sealing ball valve |
| CN112728151A (en) * | 2020-12-31 | 2021-04-30 | 五洲阀门股份有限公司 | Ball valve with multiple sealing track structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338003A (en) * | 1983-11-14 | 1994-08-16 | John Beson | Dual seal ball valve |
| JPS6117771A (en) * | 1984-07-02 | 1986-01-25 | Kobe Steel Ltd | Ball valve |
| CN201866315U (en) * | 2010-10-21 | 2011-06-15 | 圣博莱阀门有限公司 | Valve seat with dual-seal pair |
| CN102062231A (en) * | 2010-12-28 | 2011-05-18 | 吴军 | Hard-soft double-layer sealing combined valve seat of corrugated pipe |
| CN103322233A (en) * | 2013-07-05 | 2013-09-25 | 昆山维萨阀门有限公司 | Valve applied in ultralow-temperature environments |
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2018
- 2018-09-20 CN CN201811101331.9A patent/CN108980398B/en active Active
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| Publication number | Publication date |
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| CN108980398A (en) | 2018-12-11 |
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Denomination of invention: A Compact Double Seal Ball Valve Seat Effective date of registration: 20230724 Granted publication date: 20200825 Pledgee: Bank of Zigong Limited by Share Ltd. Pledgor: SICHUAN KAITZ VALVE MFG. Co.,Ltd. Registration number: Y2023980049385 |