CN212616373U - Three-eccentric sealing butterfly valve - Google Patents
Three-eccentric sealing butterfly valve Download PDFInfo
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- CN212616373U CN212616373U CN202021832075.3U CN202021832075U CN212616373U CN 212616373 U CN212616373 U CN 212616373U CN 202021832075 U CN202021832075 U CN 202021832075U CN 212616373 U CN212616373 U CN 212616373U
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Abstract
The utility model discloses a three eccentric seal butterfly valves, which comprises a valve body, be provided with the valve plate in the valve body, the valve body is connected with the valve rod, the valve rod is connected with its pivoted executor of drive, the valve rod with the valve plate passes through connecting block fixed connection, be provided with on the valve plate with the valve body complex is sealed vice, sealed vice with the valve plate passes through the clamp plate and fixes, the valve plate with be provided with the sealing washer between sealed vice. The utility model discloses lead to the valve plate and pass through the connecting hole indirect fixation with the valve rod, the three independent existence carries out pre-assembly before the processing, adds the relative position and the roughness that only need guarantee sealed face man-hour, and the position degree can carry out the secondary adjustment for eliminate machining error and assembly error, guarantee product quality. The utility model discloses overall structure design is stable, and the leakproofness is good, and is firmly durable.
Description
Technical Field
The utility model relates to the technical field of valves, more specifically relates to a three eccentric seal butterfly valves.
Background
The three-eccentric seal butterfly valve is introduced from the 80 s in China, is applied to the industries such as chemical industry, electric power and the like, soft seal is mostly adopted for a seal pair, the requirements of low friction, low leakage and quick closing of some applications are met, the localization of the valve is realized, the large-scale requirement is met, meanwhile, the seal pair of the three-eccentric hard seal butterfly valve is made of metal, and the leakage requirement of the metal seal pair valve in the national standard GB13927-2008 is D level.
In nuclear power engineering, a nuclear reactor generates electricity, a large amount of waste gas is generated, the waste gas often has high radioactivity, the waste gas is converted into gas with a composite emission standard along an air pipe through a series of post-treatment processes and is discharged outdoors, a large number of valves are often arranged on an air duct in order to adjust air volume or realize a sealing effect, and under the condition of higher leakage requirement, a soft sealing structure is usually adopted, but the soft sealing has the defects of being not durable, poor in abrasion and irradiation resistance, short in service cycle of a sealing pair, and poor in reliability of a conventional hard sealing valve, and cannot meet the requirement of nuclear grade anti-seismic application of a nuclear power station.
Therefore, the research and development aim of the product is to develop an AA-grade metal hard sealing butterfly valve which meets the nuclear-grade anti-seismic application in a ventilation system related to nuclear safety.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a three eccentric seal butterfly valves that sealing performance is good, stable in structure, firmly durable.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a three eccentric seal butterfly valves, includes the valve body, be provided with the valve plate in the valve body, the valve body is connected with the valve rod, the valve rod is connected with its pivoted executor of drive, the valve rod with the valve plate passes through connecting block fixed connection, be provided with on the valve plate with valve body complex is sealed vice, sealed vice with the valve plate passes through the clamp plate and fixes, the valve plate with be provided with the sealing washer between sealed vice.
By adopting the valve with the triple eccentric structure, the sealing surface of the sealing pair can be separated from the sealing surface of the valve body immediately at the moment of opening, and when the valve is closed, the sealing surface of the sealing pair can contact and compress the sealing surface of the valve body only at the moment of closing, so that the mechanical abrasion and scratch between the sealing surfaces when the valve plate is opened and closed are thoroughly eliminated, and the service life of the sealing pair is prolonged. Conventional butterfly valve rod and valve plate lug connection together, it is fixed through the taper pin, for guaranteeing sealing performance, require very high to the processing of sealed vice sealed face, no matter be surface roughness or position degree, increased the manufacturing degree of difficulty. The utility model discloses well valve plate passes through the connecting block with the valve rod indirectly fixed, and the three exists independently, and the connecting block passes through the bolt to be connected with the valve plate, carries out preassembly before the processing, adds the relative position and the roughness that only need guarantee sealed face man-hour, and the position degree can carry out the secondary adjustment for eliminate machining error and assembly error, guarantee product quality.
When the butterfly valve is closed, the sealing specific pressure between the sealing surfaces of the butterfly valve can be generated by the driving torque of an actuator additionally arranged on the valve rod, the reduction and disappearance of the sealing specific pressure between the sealing surfaces caused by the aging, cold flow, elastic failure and other reasons of elastic materials of the valve plate in the conventional butterfly valve are eliminated by the components, and the random adjustment of the sealing specific pressure of the butterfly valve can be realized by the change of the additionally arranged driving torque, so that the sealing performance and the service life of the three-eccentric sealing butterfly valve are greatly improved.
Furthermore, the inner side surface of the sealing pair connected with the valve plate is a cylindrical surface, and the outer side surface in contact with the valve body is an elliptical oblique conical surface. The inner side surface of the sealing pair is a cylindrical surface and is matched with the valve plate for radial positioning, and the outer side surface, namely the sealing surface, adopts an elliptical oblique conical surface, so that the sealing performance is improved.
Furthermore, one side of the valve plate is provided with a connecting hole connected with the connecting block, and the connecting hole is a blind hole.
Furthermore, a plurality of corresponding positioning holes are formed in the circumferential direction of the sealing pair and the valve plate, and positioning taper pins are arranged in the positioning holes. The sealing pair and the valve plate are accurately positioned by the positioning taper pin, so that the relative position of the sealing pair and the valve plate is ensured, circumferential positioning is carried out, and secondary replacement of the sealing pair is facilitated.
Further, the valve plate with the clamp plate passes through bolted connection, set up the bolt hole that is used for connecting on the valve plate, the bolt hole adopts the blind hole. The pressing plate and the valve plate are locked by bolts, so that the valve plate is convenient to disassemble and replace, and the bolt holes are all set to be blind holes, so that adverse effects on the sealing performance of the valve plate can be avoided. The bolt fastener is locked by the locking gasket, and the anti-loosening effect is achieved, and meanwhile the shock resistance can be improved.
Furthermore, the valve body is provided with a reinforcing rib plate, the earthquake resistance intensity is analyzed through finite elements, and corresponding reinforcing rib plates are arranged for the valve bodies of different specifications to be reinforced, so that the earthquake resistance requirement of the product is ensured.
Furthermore, the sealing pair adopts a metal graphite composite gasket, the composite gasket is sealed by elastic deformation, the metal graphite composite sealing is adopted to replace a rubber ring for sealing, the problems that the sealing material is easy to age, is not high-temperature resistant and has poor irradiation resistance are solved, and the sealing pair has higher safety and sealing performance.
Furthermore, the sealing ring is made of ethylene propylene diene monomer, so that the sealing ring is aging-resistant, corrosion-resistant and high in pressure resistance, and the sealing performance can be improved.
Furthermore, the valve body is made of stainless steel, and is made of 304 stainless steel, so that the valve body is high in strength, corrosion-resistant and wear-resistant.
To sum up, the utility model discloses lead to the valve plate and pass through the connecting hole indirect fixation with the valve rod, the three exists independently, carries out pre-assembly before the processing, adds the relative position and the roughness that only need guarantee sealed face man-hour, and the position degree can carry out the secondary adjustment for eliminate machining error and assembly error, guarantee product quality. The utility model discloses overall structure design is stable, and the leakproofness is good, and is firmly durable.
Drawings
FIG. 1 is a schematic diagram of a valve plate structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is an enlarged view of the structure of the middle valve plate.
Description of the labeling: 1. a valve body; 2. a valve plate; 3. a valve stem; 4. an actuator; 5. connecting blocks; 6. pressing a plate; 7. a sealing pair; 8. a seal ring; 9. a locking washer; 10. positioning a taper pin; 11. and (4) bolts.
Detailed Description
A specific embodiment of a triple offset butterfly valve according to the present invention will be further described with reference to fig. 1 to 2.
The utility model provides a three eccentric seal butterfly valves, includes valve body 1, be provided with valve plate 2 in the valve body 1, valve body 1 is connected with valve rod 3, valve rod 3 is connected with its pivoted executor 4 of drive, valve rod 3 with valve plate 2 passes through 5 fixed connection of connecting block, be provided with on the valve plate 2 with 1 complex of valve body is sealed vice 7, sealed vice 7 with valve plate 2 is fixed through clamp plate 6, valve plate 2 with be provided with sealing washer 8 between sealed vice 7.
By adopting the valve with the three-eccentric structure, the sealing surface of the sealing pair 7 can be separated from the sealing surface of the valve body 1 immediately at the opening moment, and when the valve is closed, the sealing surface of the sealing pair 7 can contact and press the sealing surface of the valve body 1 only at the closing moment, so that the mechanical abrasion and scratch between the sealing surfaces when the valve plate 2 is opened and closed are thoroughly eliminated, and the service life of the sealing pair 7 is prolonged. Conventional butterfly valve rod 3 is in the same place with 2 lug connection of valve plate, and is fixed through the taper pin, for guaranteeing sealing performance, requires very high to the processing of sealed face of sealed pair 7, no matter is roughness or position degree, has increased the manufacturing degree of difficulty. The utility model discloses well valve plate 2 passes through 5 indirect fixations of connecting block with valve rod 3, and the three exists independently, and connecting block 5 passes through bolt 11 and is connected with valve plate 2, carries out preassembly before the processing, adds the relative position and the roughness that only need guarantee sealed face man-hour, and the position degree can carry out the secondary adjustment for eliminate machining error and assembly error, guarantee product quality.
When the butterfly valve is closed, the sealing specific pressure between the sealing surfaces of the butterfly valve can be generated by the driving torque of the actuator 4 additionally arranged on the valve rod 3, the reduction and disappearance of the sealing specific pressure between the sealing surfaces caused by the aging, cold flow, elastic failure and other reasons of elastic materials of the valve plate 2 in the conventional butterfly valve are eliminated by the components, and the random adjustment of the sealing specific pressure can be realized by the change of the externally-arranged driving torque, so that the sealing performance and the service life of the three-eccentric sealing butterfly valve are greatly improved.
In this embodiment, preferably, the inner side surface of the seal pair 7 connected to the valve plate 2 is a cylindrical surface, and the outer side surface contacting the valve body 1 is an elliptical oblique conical surface. The inner side surface of the sealing pair 7 is a cylindrical surface and is matched with the valve plate 2 for radial positioning, and the outer side surface, namely a sealing surface, adopts an elliptical oblique conical surface, so that the sealing performance is improved.
In this embodiment, preferably, one side of the valve plate 2 is provided with a connecting hole connected with the connecting block 5, and the connecting hole is a blind hole.
In this embodiment, preferably, a plurality of corresponding positioning holes are formed in the circumferential direction of the sealing pair 7 and the valve plate 2, and a positioning taper pin 10 is arranged in each positioning hole. The sealing pair 7 and the valve plate 2 are accurately positioned by the positioning taper pin 10, so that the relative position of the sealing pair 7 and the valve plate 2 is ensured, circumferential positioning is carried out, and secondary replacement of the sealing pair 7 is facilitated.
Preferably, in this embodiment, the valve plate 2 is connected to the pressure plate 6 through a bolt 11, a bolt 11 hole for connection is formed in the valve plate 2, and the bolt 11 hole is a blind hole. The pressing plate 6 and the valve plate 2 are locked by the bolts 11, so that the disassembly and the replacement are convenient, and the 11 holes of the bolts are all set to be blind holes, so that adverse effects on the sealing performance of the valve plate 2 cannot be caused. The bolt 11 fastener adopts the locking gasket 9 to lock, plays locking effect, can increase the shock resistance.
In the preferred embodiment, the valve body 1 is provided with the reinforcing rib plate, the earthquake resistance intensity is analyzed through the finite element, and the corresponding reinforcing rib plate is arranged for the valve body 1 with different specifications to be reinforced, so that the earthquake resistance requirement of the product is ensured.
In the preferred embodiment, the sealing pair 7 adopts the metal graphite composite gasket, the composite gasket is sealed by elastic deformation, the metal graphite composite sealing is adopted to replace the rubber ring sealing, the problems that the sealing material is easy to age, is not high temperature resistant and has poor irradiation resistance are solved, and the sealing device has higher safety and sealing performance.
In this embodiment, preferably, the seal ring 8 is made of ethylene propylene diene monomer, and has strong aging resistance, corrosion resistance and compression resistance, and the sealing performance can be improved.
In the present embodiment, the valve body 1 is preferably made of stainless steel, and the valve body 1 is made of 304 stainless steel, and has high strength, corrosion resistance and wear resistance.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a three eccentric seal butterfly valves which characterized in that: the valve comprises a valve body, be provided with the valve plate in the valve body, the valve body is connected with the valve rod, the valve rod is connected with its pivoted executor of drive, the valve rod with the valve plate passes through connecting block fixed connection, be provided with on the valve plate with the valve body complex is sealed vice, sealed vice with the valve plate passes through the clamp plate and fixes, the valve plate with be provided with the sealing washer between sealed vice.
2. The triple offset seal butterfly valve of claim 1, wherein: the inner side face of the sealing pair connected with the valve plate is a cylindrical surface, and the outer side face in contact with the valve body is an elliptical oblique conical surface.
3. The triple offset seal butterfly valve of claim 1, wherein: and one side of the valve plate is provided with a connecting hole connected with the connecting block, and the connecting hole is a blind hole.
4. The triple offset seal butterfly valve of claim 1, wherein: the periphery of the sealing pair and the valve plate is provided with a plurality of corresponding positioning holes, and positioning taper pins are arranged in the positioning holes.
5. The triple offset seal butterfly valve of claim 1, wherein: the valve plate with the clamp plate passes through bolted connection, set up the bolt hole that is used for connecting on the valve plate, the bolt hole adopts the blind hole.
6. The triple offset seal butterfly valve of claim 1, wherein: and the valve body is provided with a reinforcing rib plate.
7. The triple offset seal butterfly valve of claim 2, wherein: the sealing pair adopts a metal graphite composite gasket.
8. The triple offset seal butterfly valve of claim 1, wherein: the sealing ring is made of ethylene propylene diene monomer.
9. The triple offset seal butterfly valve of claim 1, wherein: the valve body is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021832075.3U CN212616373U (en) | 2020-08-28 | 2020-08-28 | Three-eccentric sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021832075.3U CN212616373U (en) | 2020-08-28 | 2020-08-28 | Three-eccentric sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212616373U true CN212616373U (en) | 2021-02-26 |
Family
ID=74704831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021832075.3U Active CN212616373U (en) | 2020-08-28 | 2020-08-28 | Three-eccentric sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212616373U (en) |
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2020
- 2020-08-28 CN CN202021832075.3U patent/CN212616373U/en active Active
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