CN107013688B - Double convex surface hollow butterfly valve plate - Google Patents
Double convex surface hollow butterfly valve plate Download PDFInfo
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- CN107013688B CN107013688B CN201710441029.7A CN201710441029A CN107013688B CN 107013688 B CN107013688 B CN 107013688B CN 201710441029 A CN201710441029 A CN 201710441029A CN 107013688 B CN107013688 B CN 107013688B
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention belongs to a butterfly valve component, and particularly relates to a double-convex-surface hollow butterfly valve plate. The valve plate driving mechanism comprises a valve plate body which is round as a whole and a fixed seat which is fixed on one side of the valve plate body and connected with the valve plate driving mechanism; the valve plate body comprises a first convex panel and a second convex panel, wherein the concave surfaces of the first convex panel and the second convex panel are oppositely arranged, the longitudinal sections of the first convex panel and the second convex panel are arc-shaped or arched, a fixed seat is fixed on the outer side of the first convex panel, the outer edges of the first convex panel and the second convex panel are fixedly connected into a whole through a rigid sealing ring, and the outer edges of the rigid sealing ring and the inner wall of a medium channel arranged on the valve seat form a sealing pair which is matched with each other. The invention effectively solves the technical problems that the existing product has poor sealing effect under the condition of meeting the structural strength, is not suitable for medium conveying regulation and truncation at high temperature and the like, and has the advantages of high forward pressure resistance, good sealing reliability and stability, certain reverse sealing effect and the like.
Description
Technical Field
The invention belongs to a butterfly valve component, and particularly relates to a double-convex-surface hollow butterfly valve plate.
Background
The valve industry plays an important role in national economic development as an important link of equipment manufacturing industry, and the valve industry chain in China is numerous but not a strong country. Generally, china has already been in the line of the world valve major country, but from the viewpoint of product quality, china still has a certain gap from the valve strong country. The phenomena of low production concentration, low valve research and development capability matched with high-end products, low manufacturing technical level of the valve industry and the like still exist in the industry, and a plurality of high-parameter, high-temperature and high-pressure and high-pound-grade key valves originally depend on imports all the time. In order to promote the localization of the valve, after a plurality of opinions about accelerating the localization of equipment manufacturing industry of joyful equipment issued by a state institute, a series of major deployments are made successively by related national departments according to the requirements of the localization of the major equipment made by the state, the head is drawn by the national development committee, the China mechanical industry association and the China general mechanical industry association deploy and make a valve localization scheme of the major equipment in the related field, and the valve localization is coordinated with the related departments for many times, so that the valve localization has been commonly known in the domestic valve industry nowadays. Actively adopting international standards to design products; absorb foreign excellent design structures (including patent technology); product test and performance inspection are strictly carried out according to international standards; absorbs the experience of the foreign advanced production process and attaches importance to the research, the popularization and the application of the new material; the necessary way of accelerating the localization process, promoting the continuous update of valve products and comprehensively realizing the localization of the valves is to find out the technical parameters, working conditions and the like of imported high-parameter valve products.
The butterfly valve is also called a flap valve and can be used for on-off control of pipeline media. A butterfly valve refers to a valve in which a closing member (a valve flap or a butterfly plate) rotates around a valve shaft to open and close, and mainly performs a cutting and throttling function on a pipeline. Its main structural style includes central line butterfly valve, eccentric butterfly valve, double eccentric butterfly valve, triple eccentric butterfly valve, etc., its advantages are small rotating moment, flexible operation, simple structure and convenient use. The butterfly valve is suitable for pipelines for conveying various corrosive and non-corrosive fluid media in engineering systems such as producer furnaces, coal gas, natural gas, liquefied petroleum gas, urban gas, cold and hot air, chemical smelting, power generation, environmental protection and the like, and is used for adjusting and cutting off the flow of the media.
To the extent that the applicant knows, the butterfly valve plate applied to the medium conveying process in the metallurgical industry in the existing market is usually driven by a mechanical drive or other power sources (high-pressure air source and hydraulic drive) to realize the sealing between the butterfly valve plate and a valve seat medium channel, the valve plate mostly adopts a planar plate-shaped structure, and the technical defects existing in the structural design are that the pressure resistance of the valve plate is poor, the valve plate is repeatedly impacted by huge forward pressure and reverse medium under a high-temperature environment, the valve plate is easy to deflect or structurally deform (upwarp or downwarp) due to fatigue or exceeding the pressure resistance limit, and the sealing performance of the valve plate on the medium channel sealing surface is reduced (seriously or even lost) due to the structural deformation of the valve plate, and the adjusting and cutting-off effects on the medium conveying are lost.
Patent documents retrieved by the applicant include:
a patent document with an authorization notice number of CN202017774U discloses a high-temperature-resistant double-arch-shaped valve plate square butterfly valve, a valve plate through shaft is mounted on a butterfly valve body through a shaft sleeve and a bearing, a valve plate rocker is arranged at the top of the valve plate through shaft, an arc-shaped front butterfly valve plate and a rear butterfly valve plate are arranged on the shaft sleeve of the valve plate through shaft in the butterfly valve body, an arc-shaped connecting rib plate is arranged between the front butterfly valve plate and the rear butterfly valve plate, a left valve plate limiting block is arranged on the inner surface of a left side plate of the butterfly valve body, and a right valve plate limiting block is arranged on the inner surface of a right side plate of the butterfly valve body.
The technical scheme has the design defects that: firstly, the technical scheme is not suitable for the sealing requirement in a medium conveying pipeline, and in order to meet the requirements of large overflow, no dead angle and small flow resistance, the section of the medium conveying pipeline is usually circular; the square valve plate is difficult to seal at the dead angle, and is usually used in a low-speed and low-pressure ventilation system. Secondly, the valve plate through shaft is assembled at the center line position of the valve plate, and the shaft is intersected with the sealing surface, so that reliable sealing is difficult to realize on the premise of flexible rotation, and the structure is usually used for regulating valves or butterfly valves with flexible sealing. And thirdly, the front butterfly valve plate and the rear butterfly valve plate are connected together through an arc-shaped connecting rib plate, and a left valve plate limiting block and a right valve plate limiting block are arranged on the left side plate and the right side plate of the butterfly valve body, so that the moving ranges of the front butterfly valve plate and the rear butterfly valve plate are limited by the left valve plate limiting block and the right valve plate limiting block, and although the structural strength is ensured, the weight of the part is increased and the flexibility of rotation is influenced by the adoption of the structure.
In summary, how to optimally design the valve plate structure to achieve a better two-way sealing effect on the basis of satisfying the structural strength and be suitable for medium transportation at high temperature is one of the technical problems troubling technicians in the field and one of the main research directions for the butterfly valve structure design in the medium transportation pipeline applied to the high-temperature environment.
Disclosure of Invention
The invention aims to provide a double-convex-surface hollow butterfly valve plate, which not only can effectively increase the structural strength of the valve plate and improve the shock resistance of the valve plate, but also can ensure that the sealing is more reliable.
The overall technical concept of the invention is as follows:
the double-convex-surface hollow butterfly valve plate comprises a valve plate body which is circular as a whole, and a fixed seat which is fixed on the outer side of the valve plate body and is connected with a valve plate driving mechanism; the valve plate body comprises a first convex panel and a second convex panel, wherein the concave surfaces of the first convex panel and the second convex panel are oppositely arranged, the longitudinal sections of the first convex panel and the second convex panel are arc-shaped or arched, a fixed seat is fixed on the outer side of the first convex panel, the outer edges of the first convex panel and the second convex panel are fixedly connected into a whole through a rigid sealing ring, and the outer edges of the rigid sealing ring and the inner wall of a medium channel arranged on the valve seat form a sealing pair which is matched with each other.
The specific technical concept of the invention is as follows:
in order to effectively seal the valve plate and the inner wall of the medium channel of the valve seat, the sealing reliability is further improved under the condition that the valve plate is pressed, and meanwhile, the sealing effect is prevented from being influenced by the deposition of residual media, the preferable technical scheme is that the sealing pair is a conical surface sealing pair.
The more preferable structure design is that the taper angle in the conical surface sealing pair is alpha, and the alpha is more than or equal to 60 degrees and less than or equal to 120 degrees.
In order to improve the structural strength of the first convex panel at the joint of the fixing seat, improve the pressure-bearing performance of the surface of the first convex panel and meet the requirement that the first convex panel is not easy to generate structural deformation, the preferable technical scheme is that the first convex panel connected with the fixing seat is provided with a thickened strengthening part.
In order to facilitate the connection between the fixing base and the surface of the first convex plate, the preferred technical scheme is that the surface of the first convex plate connected with the fixing base is a plane.
The connection mode of the first convex panel, the second convex panel and the rigid sealing ring can adopt various existing fixing modes, including but not limited to welding, bolts, clamping and the like, without departing from the technical essence of the invention, so that the requirements of industrial manufacturing are met, the uniform stress of a structural part is met, and meanwhile, the exposed parts are reduced to improve the corrosion resistance of the surface of the structural part.
The height, diameter and thickness of the first convex panel and the second convex panel are designed adaptively according to the specification and application environment of the butterfly valve, so that the layout of the part assembly and the matching mechanism is conveniently realized, and the requirement that the sealing reliability can be further improved by micro elastic deformation generated after the parts are pressed is met, the preferable technical realization mode is that the distance between the top and the bottom of the first convex panel is h1, the diameter of the first convex panel is D1, the distance between the top and the bottom of the second convex panel is h2, h1 is more than or equal to 5mm and less than or equal to 150mm, h2 is more than or equal to 5mm and less than or equal to 600mm and less than or equal to D1 and less than or equal to 2000mm, and D2 is more than or equal to 600mm and less than or equal to 2000mm.
More preferably, the distance between the top and the bottom of the first convex panel is h1, the distance between the top and the bottom of the second convex panel is h2, wherein h1 is more than or equal to 30mm and less than or equal to 150mm, and h2 is more than or equal to 30mm and less than or equal to 150mm.
In order to ensure that the first convex panel and the second convex panel are stressed uniformly and reduce the impact on the valve plate, the preferred technical scheme is that the convex centers of the first convex panel and the second convex panel are coaxial with the central axis of the rigid sealing ring.
It can be obvious that, in order to guarantee the service life of the parts and meet the use requirements, the rigid sealing ring, the first convex panel and the second convex panel are made of high-temperature-resistant and corrosion-resistant metal materials or the surfaces of the made materials are treated to meet the requirements of high-temperature resistance and corrosion resistance.
The working principle of the invention is as follows:
the valve plate moves towards the sealing surface under the driving of a transmission component matched with the fixed seat, and the force-bearing side (the first convex panel) of the valve plate can generate micro elastic deformation expanding along the radial direction when the valve is closed, so that the sealing surface becomes more compact, the sealing reliability of the sealing pair is improved, and meanwhile, the pressure resistance and the shock resistance of the valve plate are further improved due to the structural design of the convex panel.
In order to verify the technical effect of the invention, the applicant refers to the existing national standards and industrial standards, and performs the following comparative tests by combining the application environment and the practice:
1. traditional product (plane type valve)
1. The structural form of the valve is as follows: the valve body and the valve plate are both plane-type sealing surfaces, the valve plate is of a flat-plate structure, and the width of the sealing surface is about 12mm.
2. And (3) relevant parameters: the valve is opened and closed by driving the hydraulic cylinder to rotate by 90 degrees, the cylinder diameter is phi 100mm, and the pressure is 140kg.
3. Test procedure
(1) And starting the hydraulic station, driving the hydraulic station to open the valve, and wiping the sealing surface clean.
(2) And closing the valve, installing a standard blind plate at the air inlet end of the valve, installing a pressure gauge and an air connecting source, installing a dial indicator at the reverse sealing surface of the valve, and checking the strength and deformation condition of the valve plate.
(3) Positive pressure test (air source is air station compressed air, pressure is 8 kg)
(1) 3kg of injection pressure: the pressure gauge has the advantages that the pressure is kept constant for 5 minutes, soap water is used for blowing to the periphery of the sealing surface after the pointer of the pressure gauge is stabilized, naked eyes are used for observing along the sealing surface by using a 100-time magnifier, fine bubbles are accumulated at two symmetrical ends of the valve shaft, the bubbles break into water drops to form water drops to the valve cavity after a long time, water is accumulated in the cavity, the water drops 8 drops after the measurement for 30 minutes, and the reverse dial indicator shakes in a grid of + 1.
(2) Injection pressure of 4kg: constant pressure is kept for 5 minutes, a meter pointer is not stable in shaking, soap water is blown to a sealing surface, tiny bubbles along the periphery of the sealing surface are broken by naked eyes to drip water into a valve cavity, water is stored in the cavity and is discharged along the bottom of the valve cavity, and 20 drops of water are dripped after 30 minutes. The reverse dial indicator is dithered within +2 bins.
(4) Reverse compression test
(1) And (4) mounting the blind plate at the outlet end flange of the medium channel, and mounting a dial indicator at the central part of the valve shaft.
(2) Injection pressure of 1kg: and water leaks from the outer edge of the sealing surface while injection, the pressure gauge does not apply pressure, the pointer shakes more, water drops form a string and cannot be counted, and the dial indicator at the valve plate is +5 grids.
Conclusion
The pressure-bearing capacity of the traditional product adopting the flat plate valve plate is 3kg through tests, and the traditional product can not bear pressure in the reverse direction.
2. Product adopting structure of the invention
1. The structural form of the valve is as follows: the valve body is of a traditional structure, and the sealing surface is a plane seal. The valve plate adopts the double-convex surface hollow butterfly valve plate, and the sealing surface is plane sealing.
2. And (3) related parameters: the valve driving switch is a hydraulic cylinder which rotates 90 degrees, the cylinder diameter is phi 100mm, and the pressure is 140kg.
3. Procedure of the test
(1) And starting the hydraulic station, driving the hydraulic cylinder, opening the valve and wiping the sealing surface clean.
(2) And closing the valve, installing a standard blind plate at the air inlet end of the valve, installing a pressure gauge, connecting an air source, installing a dial indicator at the reverse sealing surface of the valve, and detecting the strength of the valve plate.
(3) Positive pressure test (compressed air source, pressure 8 kg)
(1) Injection pressure 3kg: and (3) keeping the pressure for 5 minutes, blowing soap water to the sealing surface after the pointer of the pressure gauge is stable, observing the periphery of the sealing surface without bubbles by naked eyes with a magnifying glass of 100 times, wherein no water drops and accumulated water exist at the bottom of the valve cavity, discharging the water drops after 30 minutes of measurement, and stabilizing the pointer of the reverse dial indicator at 0 position.
(2) Injection pressure of 4kg: the pressure was held constant for 5 minutes and the pressure gauge needle was stable indicating 4kg. When the meat eyes are observed by a 100-time magnifier, no bubble exists at the soap water spraying position, no accumulated water exists in the valve cavity, no water drops are discharged from the bottom of the valve cavity, and the pointer of the reverse dial indicator stably indicates at a 0 position.
(3) 6kg of injection pressure: the constant pressure is 5 minutes, after the pointer of the pressure gauge is stable, soap water is sprayed along the periphery of the sealing surface, three small bubble clouds are observed by naked eyes with a magnifying glass of 100 times, after the detection is carried out for 10 minutes, individual small bubbles are broken, trace accumulated water is found at the bottom of the valve cavity, 6 drops of water are dripped after the detection is carried out for 30 minutes, the constant indication of the pressure gauge is 6kg after the detection is carried out for 30 minutes, and the pressure is not reduced. The reverse pressure gauge indicates at 0.
(4) Injection pressure of 8kg: constant pressure is kept for 5 minutes, a pointer of a pressure gauge shakes at a position of 8kg, pressure maintaining is unstable, soapy water is blown to the periphery of a sealing surface, 6 air bubbles are observed by naked eyes, accumulated water is found at the bottom of a valve cavity, and water drops are discharged outside. 22 drops were dropped over 30 minutes, with a +2 grid reverse dial indicator.
(4) Reverse compression test
A standard blind plate is arranged at the outlet end of a medium channel, a pressure gauge and an air source are arranged, a dial indicator is arranged at the center of a valve rod shaft, and a dial indicator is arranged on the side wall of a hinged triangular plate used for driving a valve plate.
(1) Injection pressure of 1kg: keeping the pressure constant for 5 minutes, blowing the periphery of the sealing surface with soap water after the pointer of the pressure gauge is stabilized, and observing three small bubble clouds along the periphery of the sealing surface by naked eyes without breaking. The valve cavity has no accumulated water, and 2 drops are dripped after 30 minutes. The dial indicator at the center of the valve shaft is positioned at 0 position, and the dial indicator at the side wall of the hinged triangle swings between 3 grids at 0 position.
(2) Injection pressure 2kg: the constant pressure is 5 minutes, the pointer of the pressure gauge shakes, soap water is used for blowing the sealing surface, a plurality of bubbles are found, water drops flow to the valve cavity, the water drops drip 28 drops after 30 minutes of measurement, the pointer of the dial indicator at the center of the check valve rod shakes in +2 grids, and the dial indicator at the side wall of the hinged triangle is shaken in +/-5 grids.
Conclusion
Tests show that when the valve plate of the biconvex hollow butterfly valve is used for carrying forward pressure, no leakage exists when the valve plate is subjected to 6kg, the leakage amount exceeds the standard when the valve plate is subjected to 8kg, and the pressure-bearing capacity of the valve plate is 7kg. The reverse pressure-bearing capacity is 1kg, the national standard requirement is met, and the leakage amount is over standard at 2 kg. The analysis reason is caused by unstable horizontal position of the hinged triangle, hinged axial clearance and accumulated error swing.
The applicant needs to state that:
in the description of the present invention, the terms "inside", "outside", "longitudinal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of simplifying the description of the present invention, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention has the substantive characteristics and the obvious technical progress is that:
1. the invention skillfully designs the structure of the hollow convex panel according to the compression-resistant principle of the arch structure, and the valve plate is uniformly pressed and distributed on the edge while the pressure-bearing and impact-resistant properties of the valve plate are obviously improved, so that the valve plate has good stability and is not easy to deflect in a working state. The technical problem that the sealing effect is reduced due to structural deformation of the valve plate under the impact of pressure and media is effectively solved, and the experiment of the applicant proves that the butterfly valve has a certain reverse sealing effect while the forward sealing capability of the butterfly valve is remarkably improved.
2. In the invention, the convex panel generates radial expansion micro elastic deformation under stress, so that the rigid sealing ring is pushed to further realize radial self-tightening sealing with the sealing surface of the medium channel, and the sealing reliability of the sealing pair is effectively improved. Meanwhile, compared with the existing product, the bidirectional sealing reliability can be further improved even under the condition of lower driving power input, and the energy consumption is remarkably reduced.
3. The sealing pair is designed to adopt a conical surface sealing pair, so that the area of a sealing surface can be effectively increased, the anti-leakage performance of a butterfly valve is enhanced, the coaxiality of the sealing surface is ensured, the sealing effect is further improved by matching with the extrusion effect of the deformed convex panel, meanwhile, the deposition of residual media on the surface of the sealing surface can be avoided, and the sealing reliability and stability are improved.
4. The invention adopts the structural design of the rigid sealing ring, is particularly suitable for butterfly valves applied to medium conveying in high-temperature environments (particularly in the metallurgical industry), and effectively improves the sealing stability of the sealing pair.
5. On the premise of fully considering the stress conditions on the two sides of the valve plate, the first convex panel and the second convex panel are in structural design with different specifications, and the thickened part matched with the fixing seat is arranged on the first convex panel, so that the valve plate is not easy to deform under the stress of a power source, and the sealing effect is further improved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
The reference numbers in the drawings are as follows:
1. a rigid seal ring; 2. a second convex panel; 3. a first raised panel; 4. a fixed seat.
Detailed Description
The present invention is further described with reference to the following examples, which should not be construed as limiting the scope of the present invention, but the scope of the present invention is defined by the appended claims, and any equivalent technical means may be substituted according to the present specification without departing from the scope of the present invention.
Examples
The double-convex-surface hollow butterfly valve plate comprises a valve plate body which is integrally circular, and a fixed seat 4 which is fixed on the outer side of the valve plate body and is connected with a valve plate driving mechanism; the valve plate body include that the concave surface sets up relatively, and the longitudinal section is arc or arched first convex plate 3 and second convex plate 2, wherein the outside of first convex plate 3 is fixed with fixing base 4, the outward flange border on department of first convex plate 3, second convex plate 2 is a whole through rigid seal ring 1 fixed connection, the medium passageway inner wall of seting up on 1 outward flange of rigid seal ring and the disk seat forms the sealed pair of mutual adaptation.
The sealing pair is a conical surface sealing pair, the conical angle in the conical surface sealing pair is alpha, and the alpha is more than or equal to 60 degrees and less than or equal to 120 degrees.
The first convex plate 3 connected with the fixed seat 4 is provided with a thickened strengthening part, and the surface of the first convex plate 3 connected with the fixed seat 4 is a plane.
The first convex panel 3 and the second convex panel 2 are respectively welded and fixed with the inner side and the outer side of the rigid sealing ring 1.
The distance between the top and the bottom of the first convex panel 3 is h1, the diameter of the first convex panel 3 is D1, the distance between the top and the bottom of the second convex panel 2 is h2, the diameter of the second convex panel 2 is D2, wherein h1 is more than or equal to 5mm and less than or equal to 150mm, h2 is more than or equal to 5mm and less than or equal to 150mm, D1 is more than or equal to 600mm and less than or equal to 2000mm, and D2 is more than or equal to 600mm and less than or equal to 2000mm.
The centers of the convex surfaces of the first convex surface plate 3 and the second convex surface plate 2 are coaxial with the central axis of the rigid sealing ring 1.
The rigid sealing ring 1, the first convex panel 3 and the second convex panel 2 are made of high-temperature-resistant and corrosion-resistant metal materials or the surfaces of the materials are treated to meet the requirements of high-temperature resistance and corrosion resistance.
Claims (9)
1. The double-convex-surface hollow butterfly valve plate comprises a valve plate body which is integrally circular, and a fixed seat (4) which is fixed on the outer side of the valve plate body and is connected with a valve plate driving mechanism; the valve plate is characterized in that the valve plate body comprises a first convex plate (3) and a second convex plate (2), wherein the concave surfaces of the first convex plate (3) and the second convex plate are oppositely arranged, the longitudinal section of the first convex plate is arc-shaped or arched, a fixing seat (4) is fixed on the outer side of the first convex plate (3), the outer edges of the first convex plate (3) and the second convex plate (2) are fixedly connected into a whole through a rigid sealing ring (1), and the outer edges of the rigid sealing ring (1) and the inner wall of a medium channel formed on a valve seat form a sealing pair which is mutually matched.
2. The valve plate of a biconvex hollow butterfly valve according to claim 1, wherein the sealing pair is a conical sealing pair.
3. The valve plate of a biconvex hollow butterfly valve according to claim 2, wherein the angle of the taper in the pair of taper seals is α, α being greater than or equal to 60 ° and less than or equal to 120 °.
4. The valve plate of the biconvex hollow butterfly valve according to claim 1, characterized in that the first convex plate (3) connected to the holder (4) is provided with a thickened reinforcement.
5. The valve plate for the biconvex hollow butterfly valve according to any of the claims 1 or 4, characterized in that the surface of the first convex plate (3) connected to the fixed seat (4) is plane.
6. The valve plate of the biconvex hollow butterfly valve according to claim 1, wherein the first convex plate (3) and the second convex plate (2) are welded and fixed with the inner side and the outer side of the rigid sealing ring (1) respectively.
7. The valve plate of the biconvex hollow butterfly valve according to claim 1, wherein the distance between the top and the bottom of the first convex plate (3) is h1, the diameter of the first convex plate (3) is D1, the distance between the top and the bottom of the second convex plate (2) is h2, and the diameter of the second convex plate (2) is D2, wherein h1 is 5mm or more and 150mm, h2 is 5mm or more and 150mm or less, D1 is 600mm or more and 2000mm or less, and D2 is 600mm or more and 2000mm or less.
8. The valve plate of the biconvex hollow butterfly valve according to claim 1, wherein the distance between the top and the bottom of the first convex plate (3) is h1, the distance between the top and the bottom of the second convex plate (2) is h2, wherein h1 is greater than or equal to 30mm and less than or equal to 150mm, and h2 is greater than or equal to 30mm and less than or equal to 150mm.
9. The valve plate according to any of claims 1 to 4 and 6 to 8, wherein the centers of the first convex plate (3) and the second convex plate (2) are coaxial with the central axis of the rigid sealing ring (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441029.7A CN107013688B (en) | 2017-06-13 | 2017-06-13 | Double convex surface hollow butterfly valve plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441029.7A CN107013688B (en) | 2017-06-13 | 2017-06-13 | Double convex surface hollow butterfly valve plate |
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| CN107013688A CN107013688A (en) | 2017-08-04 |
| CN107013688B true CN107013688B (en) | 2023-03-10 |
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| CN201710441029.7A Active CN107013688B (en) | 2017-06-13 | 2017-06-13 | Double convex surface hollow butterfly valve plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108916395A (en) * | 2018-07-19 | 2018-11-30 | 陈颖翚 | A kind of valve board structure and manufacturing method of dish valve |
| CN110762232A (en) * | 2019-10-26 | 2020-02-07 | 五洲阀门股份有限公司 | Metal sealing double-plate hydraulic adjusting butterfly valve |
| CN110748654A (en) * | 2019-10-30 | 2020-02-04 | 上海沪东造船阀门有限公司 | Spherical board of hollow center butterfly valve |
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| CN107013688A (en) | 2017-08-04 |
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