CN211501676U - Novel special two-way soft sealing flange butterfly valve of sea water - Google Patents
Novel special two-way soft sealing flange butterfly valve of sea water Download PDFInfo
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- CN211501676U CN211501676U CN201922332202.7U CN201922332202U CN211501676U CN 211501676 U CN211501676 U CN 211501676U CN 201922332202 U CN201922332202 U CN 201922332202U CN 211501676 U CN211501676 U CN 211501676U
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Abstract
The utility model discloses a novel bidirectional soft sealing flange butterfly valve special for seawater, belonging to the valve field, comprising a valve body, a butterfly plate, a valve seat and a valve rod; the valve seat is provided with a conical valve seat sealing surface with a large end facing the butterfly plate; the butterfly plate is characterized in that a sealing groove is formed in the circumferential side wall of the butterfly plate, an elastic sealing ring is installed in the sealing groove, the elastic sealing ring comprises a body part embedded in the sealing groove and an extension part integrally formed on the body part, the extension part is in a conical horn shape, and the large end of the extension part faces the valve seat sealing surface and is abutted against the valve seat sealing surface to form sealing; an annular baffle is fixed on the circumferential outer wall of the butterfly plate, an annular inflatable air bag is arranged in a cavity which is defined by the circumferential outer wall of the butterfly plate, the annular baffle, the valve seat and the extension part together, the annular inflatable air bag is connected with an inflation and deflation pipe, and the inflation and deflation pipe is connected with an inflation and deflation joint arranged on the outer wall of the valve body. The utility model relates to a rationally, take place to reveal when can effectually preventing the reverse atress of butterfly plate, have the two-way seal function.
Description
Technical Field
The utility model relates to a valve field, in particular to novel special two-way soft sealing flange butterfly valve of sea water.
Background
The valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, has various types, can be divided into a gate valve, a stop valve, a plug valve, a ball valve, a butterfly valve and the like according to the function and the application, is widely used in industries such as natural gas long-line conveying pipelines, metallurgy, hydropower, thermoelectricity, urban water supply and drainage, farmland irrigation and drainage and the like, is suitable for media including natural gas, coal gas, steam, air, water and the like, and is used for stopping or communicating the media in a medium bidirectional exchange pipeline system.
The butterfly valve mainly comprises a valve body, a valve seat and a valve rod, wherein the valve seat is arranged in the valve body, a butterfly plate is arranged on the valve rod, and the valve rod is rotated to drive the butterfly plate to rotate so as to realize the opening and closing of the valve body.
The butterfly valve comprises a single-eccentric butterfly valve, a double-eccentric butterfly valve, a triple-eccentric butterfly valve and a four-eccentric butterfly valve, and the evolution process of the eccentric structure of the butterfly valve aims to reduce the abrasion between a valve plate and a valve seat in the opening and closing process of the valve. When the existing eccentric butterfly valve is closed under forward pressure, medium pressure acts on the butterfly plate, the valve is completely attached to the valve plate sealing ring and the valve seat by means of torque force, and the larger the pressure is, the tighter the sealing is, and the tighter the sealing state is. In the field of butterfly valves for seawater, because the double eccentric seal valve has the comprehensive advantages of simple structure, good sealing effect and the like, the butterfly valve mainly adopting the double eccentric structure is widely applied in the field of seawater sealing. In the field of seawater, a special soft sealing flange butterfly valve for seawater is commonly used, and is suitable for seawater medium pipelines in industries such as petroleum, petrifaction, chemical industry, electric power, environmental protection, nuclear power, seawater desalination and the like in coastal areas for cutting off and adjusting medium flow.
At present, butterfly valves on the market, including seawater special flange butterfly valves, basically realize the sealing effect through simple sealing rings on the butterfly plates, so that the sealing rings are easy to shift or even fall under the pressure effect of media in the using process to influence the sealing effect. In eccentric butterfly valve structure, can set the inner wall of disk seat to unilateral tilting, make on the one hand the valve plate can be on the other hand with its laminating, on the other hand also makes the valve plate avoid the condition appearance that sealing washer offset or drop when receiving medium forward effort, makes the sealing washer atress increase leakproofness. But the valve seat design of unilateral tilting can only play one-way good sealed effect, when rotating the butterfly plate and closing the valve body, has medium reverse acting force easily, and general butterfly valve directly influences the leakproofness of sealing washer when receiving reverse acting force, leads to the unable inseparable conflict with the valve seat inner wall of sealing washer, and then the condition of medium backward flow appears, can't realize two-way good sealed effect.
SUMMERY OF THE UTILITY MODEL
The problem to the sea water that prior art exists with two eccentric butterfly valve two-way seal effect poor, appear sealed inefficacy easily, the utility model aims to provide a novel special two-way soft sealing flange butterfly valve of sea water.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a novel bidirectional soft sealing flange butterfly valve special for seawater comprises a valve body and a butterfly plate made of nickel-chromium alloy cast iron or nickel-chromium alloy nodular cast iron, a valve seat and a valve rod made of duplex stainless steel or copper alloy materials, wherein the inner surface and the outer surface of the butterfly valve are coated with epoxy resin or heavy anti-corrosion paint; the valve seat is provided with a conical valve seat sealing surface, and the large end of the valve seat sealing surface faces the butterfly plate; the butterfly plate is characterized in that a sealing groove is formed in the circumferential side wall of the butterfly plate, an elastic sealing ring is installed in the sealing groove, the elastic sealing ring comprises a body part embedded in the sealing groove and an extension part integrally formed on the body part, the extension part is in a conical horn shape, and the large end of the extension part faces the valve seat sealing surface and is abutted against the valve seat sealing surface to form sealing; an annular baffle is fixed on the circumferential outer wall of the butterfly plate, an annular inflatable air bag is arranged in a cavity defined by the circumferential outer wall of the butterfly plate, the annular baffle, the valve seat and the extension part together, the annular inflatable air bag is connected with an inflation and deflation pipe, and the inflation and deflation pipe is connected with an inflation and deflation joint arranged on the outer wall of the valve body.
Preferably, the annular inflatable air bag is fixed on the circumferential outer wall of the butterfly plate.
Preferably, the inflation and deflation pipe is a metal pipe.
Preferably, the inner wall of the extension part is arc-shaped and is attached to the annular inflatable air bag when the valve is closed.
Preferably, the elastic sealing ring is EPDM.
By adopting the technical scheme, the inclination directions of the valve seat sealing surface and the extension part of the elastic sealing ring are opposite, so that when the butterfly plate is stressed in the forward direction, the extension part is extruded on the valve seat sealing surface, the whole butterfly plate is restrained by the valve seat sealing surface to generate a contraction effect, the butterfly plate is ensured to be in closer contact with the valve seat, and the forward sealing is realized; and because of the arrangement of the annular inflatable air bag, when the butterfly plate is stressed reversely, the annular inflatable air bag only needs to be inflated to expand, the circumferential side wall of the butterfly plate, the valve seat, the annular baffle plate and the extension part are all subjected to pressure given by the annular inflatable air bag, when the valve plate is stressed reversely and displaces, and a gap is formed between the extension part and the sealing surface of the valve seat, after the gap is formed, the annular inflatable air bag can expand towards the extension part to expand the extension part, the diameter of the outer edge end of the annular inflatable air bag is expanded, so that the sealing position with the increased diameter on the sealing surface of the valve seat can be well adapted, and the butterfly plate can still be tightly attached to the sealing surface of the valve seat after being subjected to displacement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure, 1-valve body, 11-packing groove, 12-packing gland, 13-shaft sleeve, 2-butterfly plate, 3-valve rod, 4-valve seat, 5-elastic sealing ring, 51-body part, 52-extension part, 6-annular baffle, 7-cavity, 8-annular inflatable air bag, 9-inflation and deflation pipe, and 10-inflation and deflation joint.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.
In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.
As shown in fig. 1 and 2, the novel bidirectional soft sealing flange butterfly valve special for seawater comprises a valve body 1 and a butterfly plate 2 made of nickel-chromium alloy cast iron or nickel-chromium alloy nodular cast iron material, a valve rod 3 and a valve seat 4 made of duplex stainless steel or copper alloy material, wherein flange connecting surfaces for connecting with a pipeline are formed on two opposite end surfaces of the valve body 1. The valve seat 4 is arranged inside the valve body 1; the top of the valve body 1 is provided with a shaft hole for the valve rod 3 to pass through, the shaft hole is opposite to the valve seat 4, the top of the valve body 1 is provided with a stepped packing groove 11 for sealing the valve rod 3 and a packing gland 12 for sealing the packing groove, and the packing gland 12 is fastened on the top of the valve body 1 through screws; meanwhile, a shaft sleeve 13 is sleeved at the position where the valve rod 3 is contacted with the packing; the top of the valve body 1 is provided with a flange surface for connecting with a driving mechanism, such as a pneumatic actuator or an electric actuator or a worm gear, and the like, and the upper end of the valve rod 3 passes through the flange surface at the top of the valve body 1 and is positioned outside the valve body 1.
The lower part of valve rod 3 penetrates and is connected with butterfly plate 2 in the valve body 1, and usually, the eccentric axis that passes valve body 1 of valve rod 3 (the axis of valve rod 3 does not pass through valve body 1), and butterfly plate 2 also eccentric mounting is on valve rod 3 (the axis of butterfly plate 2 does not pass through the axis of valve rod 3), thereby makes the utility model discloses a butterfly valve constitutes double-eccentric flange butterfly valve. As the prior art, the advantages and the specific structure of the double-eccentric flange butterfly valve are not described in detail.
In this embodiment, the lower end of the valve rod 3 is rotatably connected to the valve body 1 through a shaft sleeve or a bearing made of a copper alloy material, and similarly, the upper portion of the valve rod 3 is also rotatably connected to the valve body 1 through a shaft sleeve or a bearing made of a copper alloy material. As the seawater exclusive valve, in addition to the above-described member material being provided to have corrosion resistance, in the present embodiment, all the surfaces of the butterfly valve that come into contact with seawater are coated with epoxy resin or heavy anticorrosive paint.
In the present embodiment, the side of the valve seat 4 facing the butterfly plate 2 is provided with an inclined valve seat sealing surface whose diameter gradually increases from the side away from the butterfly plate 2 to the side close to the butterfly plate 2. It will be appreciated that the valve seat sealing surface is generally conical with the larger end facing the butterfly plate 2.
In this embodiment, the butterfly plate 2 adopts a double-flat-plate flow-through design, which can ensure the strength and low head loss under the dynamic impact of water flow. Meanwhile, a sealing groove is formed in the circumferential side wall of one end, facing the valve seat 4, of the butterfly plate 2, an elastic sealing ring 5 is installed in the sealing groove, and the elastic sealing ring 5 is preferably made of EPDM. The elastic seal ring 5 includes a body portion 51 fitted in the seal groove and an extension portion 52 integrally formed on the body portion. The extension portion 52 is in a tapered trumpet shape, and a large end of the extension portion 52 faces the valve seat sealing surface and abuts against the valve seat sealing surface 52 to form a seal.
In this embodiment, an annular baffle 6 is fixed on the circumferential outer wall of the butterfly plate 2, and the annular baffle 6 may be fixed on the butterfly plate 2 by a thread or a welding manner. An annular inflatable air bag 8 is arranged in a cavity 7 defined by the circumferential outer wall of the butterfly plate 2, the annular baffle 6, the valve seat 4 and the extension part 52, the annular inflatable air bag 8 is connected with an inflation and deflation pipe 9, and the inflation and deflation pipe 9 penetrates through the valve body 1 and is connected with an inflation and deflation joint 10 arranged on the outer wall of the valve body 1.
In this embodiment, the annular inflatable air bag 8 may be fixed on the circumferential outer wall of the butterfly plate 2 in a form of screws, glue or buckles. And the charging and discharging pipe 8 is a metal pipe made of copper alloy or stainless steel material.
In this embodiment, since the outer wall of the annular inflatable bag 8 is curved when the annular inflatable bag is inflated, the inner wall of the extension portion 52 is curved and is attached to the annular inflatable bag 8 when the valve is closed. The arrangement is such that the annular inflatable air bag 8 can form good contact with the inner wall of the extension part 52, and the uniform stress is ensured.
When the butterfly valve is used, the valve rod 3 is driven to rotate by external forces such as a pneumatic actuator, an electric actuator or a worm turbine, and the like, under the action of a double-eccentric structure, the butterfly plate 2 is attached to the valve seat 4 by a low friction contact force, so that the extension part 52 of the elastic sealing ring 5 is tightly pressed on the sealing surface of the valve seat, and the two parts are tightly attached to each other in an elastic deformation mode in a soft sealing mode to realize sealing; and when the butterfly plate 2 is subjected to the positive force of the medium, as shown in fig. 1, the right side is stressed, at this time, the butterfly plate 2 has the tendency and the force of moving to the left side, the extension part 52 is extruded to the valve seat sealing surface, the larger the positive stress of the butterfly plate 2 is, the tighter the sealing between the extension part 52 and the valve seat sealing surface is, and the positive sealing is ensured. When the butterfly plate 2 needs to resist the reverse force, the annular inflatable airbag 8 is inflated through the inflation and deflation joint 10 and the inflation and deflation pipe 9 to be expanded, when the butterfly plate 2 is subjected to the reverse force and is displaced (as shown in fig. 1, the butterfly plate 2 is stressed on the left side and integrally moves to the right), a gap is formed between the extension part 52 and the valve seat sealing surface, the gap can cause medium leakage, but the gap exists, so that the annular inflatable airbag 8 has an expanded space, the annular inflatable airbag 8 forces the extension part 52 to expand outwards (the angle between the extension part 52 and the axis of the valve body 1 is increased, the angle between the extension part 52 and the valve rod 3 is reduced), the diameter of the outer edge end of the extension part 52 is expanded, so that the new sealing position with the increased diameter on the valve seat sealing surface can be well adapted, and the elastic sealing ring 5 can still be tightly attached to the valve seat sealing surface after the butterfly plate 2, therefore, the gap is filled again, and the medium is ensured not to leak.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (5)
1. The utility model provides a novel special two-way soft sealing flange butterfly valve of sea water which characterized in that: the butterfly valve comprises a valve body and a butterfly plate made of nickel-chromium alloy cast iron or nickel-chromium alloy nodular cast iron, a valve seat and a valve rod made of duplex stainless steel or copper alloy material, wherein the inner surface and the outer surface of the butterfly valve are coated with epoxy resin or heavy anti-corrosion coating; the valve seat is provided with a conical valve seat sealing surface, and the large end of the valve seat sealing surface faces the butterfly plate; the butterfly plate is characterized in that a sealing groove is formed in the circumferential side wall of the butterfly plate, an elastic sealing ring is installed in the sealing groove, the elastic sealing ring comprises a body part embedded in the sealing groove and an extension part integrally formed on the body part, the extension part is in a conical horn shape, and the large end of the extension part faces the valve seat sealing surface and is abutted against the valve seat sealing surface to form sealing; an annular baffle is fixed on the circumferential outer wall of the butterfly plate, an annular inflatable airbag is arranged in a cavity defined by the circumferential outer wall of the butterfly plate, the annular baffle, the valve seat and the extension portion, the annular inflatable airbag is connected with an inflation and deflation pipe, and the inflation and deflation pipe is connected with an inflation and deflation joint arranged on the outer wall of the valve body.
2. The novel bidirectional soft sealing flange butterfly valve special for seawater according to claim 1, characterized in that: the annular inflatable air bag is fixed on the circumferential outer wall of the butterfly plate.
3. The novel bidirectional soft sealing flange butterfly valve special for seawater according to claim 1, characterized in that: the inflation and deflation pipe is a metal pipe.
4. The novel bidirectional soft sealing flange butterfly valve special for seawater according to claim 1, characterized in that: the inner wall of the extension part is arc-shaped and is attached to the annular inflatable air bag when the valve is closed.
5. The novel bidirectional soft sealing flange butterfly valve special for seawater according to claim 1, characterized in that: the elastic sealing ring is EPDM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922332202.7U CN211501676U (en) | 2019-12-23 | 2019-12-23 | Novel special two-way soft sealing flange butterfly valve of sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922332202.7U CN211501676U (en) | 2019-12-23 | 2019-12-23 | Novel special two-way soft sealing flange butterfly valve of sea water |
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| CN211501676U true CN211501676U (en) | 2020-09-15 |
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| CN201922332202.7U Active CN211501676U (en) | 2019-12-23 | 2019-12-23 | Novel special two-way soft sealing flange butterfly valve of sea water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263751A (en) * | 2021-12-11 | 2022-04-01 | 李岸隆 | Scour prevention butterfly valve |
| CN114935041A (en) * | 2022-05-25 | 2022-08-23 | 常州电站辅机股份有限公司 | Valve actuating mechanism for water hammer elimination compensation and working method thereof |
| CN114931120A (en) * | 2022-07-04 | 2022-08-23 | 南方海洋科学与工程广东省实验室(湛江) | Flexibly connected feeding distributor and cultivation feeding system |
| CN116733603A (en) * | 2023-06-27 | 2023-09-12 | 山东飞奥航空发动机有限公司 | Deepwater unmanned aerial vehicle engine and application method thereof |
-
2019
- 2019-12-23 CN CN201922332202.7U patent/CN211501676U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263751A (en) * | 2021-12-11 | 2022-04-01 | 李岸隆 | Scour prevention butterfly valve |
| CN114935041A (en) * | 2022-05-25 | 2022-08-23 | 常州电站辅机股份有限公司 | Valve actuating mechanism for water hammer elimination compensation and working method thereof |
| CN114935041B (en) * | 2022-05-25 | 2023-10-31 | 常州电站辅机股份有限公司 | Valve actuating mechanism for water hammer elimination compensation and working method thereof |
| CN114931120A (en) * | 2022-07-04 | 2022-08-23 | 南方海洋科学与工程广东省实验室(湛江) | Flexibly connected feeding distributor and cultivation feeding system |
| CN116733603A (en) * | 2023-06-27 | 2023-09-12 | 山东飞奥航空发动机有限公司 | Deepwater unmanned aerial vehicle engine and application method thereof |
| CN116733603B (en) * | 2023-06-27 | 2024-01-05 | 山东飞奥航空发动机有限公司 | Deepwater unmanned aerial vehicle engine and application method thereof |
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