Groove rubber sheet wafer type butterfly valve

Abstract

The present invention relates to a grooved rubber sheet wafer-type butterfly valve, characterized by comprising: a valve body; a body seat provided on the inner surface of the valve body; a rotary drive unit including a rotating shaft installed through the valve body and a driving means coupled to the end of the rotating shaft to provide rotational force to the rotating shaft; and a disc provided inside the valve body to open and close a flow path inside the valve body, the disc having elastic rubber coated on its surface to seal the flow path by adhering to the inner circumference of the body seat. The technical feature is that, through this, rubber with a high coefficient of friction is coated on the surface of the disc to enhance sealing performance through close contact between the body sheet and the disc, and the front and rear sides of the disc are coated with rubber while some coating is omitted in between to form a groove. Then, an elastic sealing part is formed on the inner circumference of the body sheet to protrude to correspond to the groove and is elastically supported, thereby forming an elastic sealing part that is compressed and restored according to the pressure applied by the rotation of the disc, so that when the disc closes the flow path, the elastic sealing part adheres to the groove to further enhance the sealing force.

Description

Technology Field

[0001] The present invention relates to a grooved rubber sheet wafer-type butterfly valve that improves sealing performance by increasing the adhesion between the disc and the body seat. Background Technology

[0003] Generally, various types of valves are used to open and close passages, and as an example, a rotary type having a sealed structure is mainly used.

[0004] As shown in FIG. 1, a conventional valve has a rubber sheet (1) made of rubber material formed on the inner surface of a body seat so that a metal disc (2) rotates and adheres to the rubber sheet to close the flow path, and has a high sealing power.

[0005] However, there is a problem where the rubber sheet peels off or wrinkles when the disc rotates and adheres to and detaches from the rubber sheet.

[0006] In addition, there is a problem in that a motor capable of generating even higher torque must be provided because the frictional force between the disc and the rubber sheet is high when the disc adheres to or detaches from the rubber sheet, requiring high torque for the drive unit that rotates the disc.

[0007] In addition, there is a problem where a gap occurs in a specific area due to continuous friction between the disc and the rubber sheet. Prior art literature

[0009] Korean Published Patent Application No. 10-2020-0114785 (Air sealing damper capable of preventing leakage of sealing air, Oct. 07, 2020) Korean Registered Patent Application No. 10-2096490 (Valve device with improved sealing function, Mar. 27, 2020) The problem to be solved

[0010] The present invention aims to solve the aforementioned problems by coating the surface of the disc with rubber having a high coefficient of friction, thereby enhancing sealing performance through close contact between the body sheet and the disc.

[0011] In addition, another purpose is to form a groove by coating the front and rear sides of the disc with rubber and omitting some of the coating in between, and then forming an elastic sealing part that protrudes from the inner circumference of the body seat to correspond to the groove and is elastically supported, thereby forming an elastic sealing part that is compressed and restored according to the pressure applied by the rotation of the disc, so that when the disc is in a state where the flow path is closed, the elastic sealing part adheres closely to the groove to further enhance the sealing force. means of solving the problem

[0013] To achieve the above objectives, the present invention is characterized by comprising: a valve body; a body seat provided on the inner surface of the valve body; a rotary drive unit including a rotating shaft installed through the valve body and a driving means coupled to the end of the rotating shaft to provide rotational force to the rotating shaft; and a disc provided inside the valve body to open and close a fluid passage inside the valve body, the disc having elastic rubber coated on its surface to seal the fluid passage by adhering to the inner surface of the body seat.

[0014] The above-described disc is characterized by comprising: a first coated protrusion that protrudes by being coated with rubber extending from the front to a part of the side; a second coated protrusion that protrudes by being coated with rubber extending from the rear to a part of the side; and a groove portion that forms a groove on the side between the first coated protrusion and the second coated protrusion without being coated.

[0015] The above body sheet is further characterized by having an elastic sealing part that protrudes on the inner surface to correspond to the shape of the groove and is elastically supported, and is compressed and restored according to the pressure applied by the rotation of the disk.

[0016] The elastic sealing member is characterized by comprising: a cut groove having a predetermined depth formed along both inner surfaces of the body sheet with respect to the rotation axis; a plurality of elastic support grooves formed at regular intervals along the inner surface of the body sheet and communicating with the cut groove; an elastic body mounted in the elastic support groove; and a contact member provided on the cut groove so that a portion is exposed to the outside and inserted into the groove, with its bottom surface coupled to the elastic body to be elastically supported. Effects of the invention

[0018] According to the present invention, by coating the surface of the disc with rubber having a high coefficient of friction, the sealing performance can be enhanced through close contact between the body sheet and the disc.

[0019] In addition, the front and rear sides of the disc are coated with rubber and a portion of the coating is omitted in between to form a groove. Then, the inner surface of the body sheet is configured to protrude to correspond to the groove and be elastically supported, thereby forming an elastic sealing part that is compressed and restored according to the pressure applied by the rotation of the disc. This has the effect of further enhancing the sealing force by ensuring that the elastic sealing part adheres closely to the groove when the disc is in a closed state of the fluid passage. Brief explanation of the drawing

[0021] FIG. 1 is a drawing of a valve device according to the prior art. FIG. 2 is a perspective view of a grooved rubber sheet wafer-type butterfly valve according to the present invention. FIG. 3 is a cross-sectional view taken from the front of a grooved rubber sheet wafer-type butterfly valve according to the present invention. FIG. 4 is a side view of the disc of a grooved rubber sheet wafer-type butterfly valve according to the present invention. Specific details for implementing the invention

[0022] The present invention relates to a grooved rubber sheet wafer-type butterfly valve that improves sealing performance by increasing the adhesion between the disc and the body seat. The technical features include coating the surface of the disc with rubber having a high coefficient of friction to enhance sealing performance through adhesion between the body seat and the disc, forming a groove by coating the front and rear sides of the disc with rubber and omitting a portion of the coating in between, and forming an elastic sealing part that protrudes from the inner circumference of the body seat to correspond to the groove and is elastically supported, thereby forming an elastic sealing part that is compressed and restored according to the pressure applied by the rotation of the disc, so that when the disc closes the flow path, the elastic sealing part adheres to the groove to further enhance the sealing force.

[0024] FIG. 2 is a perspective view of a grooved rubber sheet wafer-type butterfly valve according to the present invention, FIG. 3 is a cross-sectional view of a grooved rubber sheet wafer-type butterfly valve according to the present invention viewed from the front, and FIG. 4 is a side view of a disc of a grooved rubber sheet wafer-type butterfly valve according to the present invention.

[0026] Hereinafter, embodiments of the present invention having the aforementioned features will be described in more detail with reference to the attached drawings.

[0027] The grooved rubber sheet wafer-type butterfly valve according to the present invention comprises a valve body (100), a body seat (200), a rotary drive unit (300), and a disc (400).

[0028] A valve body (100) has a fluid passage formed therein through which fluid can flow, and a body seat (200) is provided on the inner surface of the valve body (100).

[0029] The rotary drive unit (300) includes a rotary shaft (310) installed through the valve body (100) and a driving means (not shown) coupled to the end of the rotary shaft (310) to provide rotational force to the rotary shaft (310).

[0030] The disc (400) is provided inside the valve body (100) to open and close the flow path inside the valve body (100), and has elastic rubber coated on its surface to seal the flow path by adhering to the inner surface of the body seat (200).

[0031] At this time, the disc (400) includes a first coating protrusion (410), a second coating protrusion (420), and a groove (430), and the aforementioned detailed configuration is formed according to the difference in thickness due to the rubber coating.

[0032] First, the first coating protrusion (410) is coated with rubber and protrudes so as to extend from the front of the disk (400) to a part of the side.

[0033] The second coating protrusion (420) is coated with rubber and protrudes so as to extend from the rear of the disc (400) to a part of the side.

[0034] The groove portion (430) is formed without being coated on the side between the first coating protrusion (410) and the second coating protrusion (420).

[0035] That is, the groove portion (430) represents a point that forms a concave groove between the protruding first coating protrusion (410) and the second coating protrusion (420).

[0036] By forming the groove (430), friction can be reduced compared to when the entire side of the disk (400) is coated with rubber, thereby reducing the torque of the driving means (not shown) for rotating the disk (400).

[0037] In addition, when the body sheet (200) and the disc (400) are in close contact, there is a groove (430) between the first coating protrusion (410) and the second coating protrusion (420), so that each of the first coating protrusion (410) and the second coating protrusion (420) can be easily restored to their original shape after deformation such as compression and friction due to elasticity.

[0038] On the other hand, if the entire side of the disc (400) is coated with rubber without the groove (430), the rubber may tear or deform, causing a gap to form between the disc (400) and the body seat (200).

[0040] Meanwhile, the body sheet (200) may further be provided with an elastic sealing part (500) that protrudes on the inner surface to correspond to the shape of the groove and is elastically supported, and is compressed and restored according to the pressure applied by the rotation of the disk (400).

[0041] That is, as the disk (400) rotates, the first coating protrusion (410) or the second coating protrusion (420) presses the elastic sealing part (500), causing it to be compressed and pressed, and then elastically restored and inserted into the groove (430), thereby increasing the contact area and increasing the sealing force.

[0042] To explain the elastic sealing part (500) in more detail, it is formed by including an incision groove (510), an elastic support groove (520), an elastic body (530), and a sealing member (540).

[0043] The cut groove (510) is formed along the inner surface of both sides of the body sheet (200) with respect to the rotation axis (310) and is formed to have a predetermined depth so that the contact member (540), which will be described later, can be compressed and restored in the inner and outer directions.

[0044] A plurality of elastic support grooves (520) are formed at regular intervals along the inner surface of the body sheet (200) and are connected to the cut groove (510).

[0045] That is, the elastic support groove (520) is cut deeper into the outer body sheet (200) from the cut groove (510) forming a ring-shaped space, and a plurality of them are individually arranged along the circumference of the cut groove (510).

[0046] The elastic body (530) is mounted in each of the plurality of elastic support grooves (520).

[0047] The contact member (540) is provided on the cut groove (510) so that a part of it is exposed to the outside and is inserted into the groove, and its bottom surface is joined to the elastic body (530) and elastically supported.

[0048] At this time, the inner cross-section of the contact member (540) is formed in a shape corresponding to the formation of a groove, and it is preferable that it be formed in a round shape.

[0049] If the inner cross-section of the contact member (540) is formed in a round shape, the jamming phenomenon when the disk (400) rotates is alleviated, thereby increasing durability.

[0051] The above-described embodiments are merely exemplary, and various other modified embodiments are possible therefrom for those skilled in the art.

[0052] Therefore, the true technical scope of protection of the present invention should include not only the above embodiments but also other embodiments that are variously modified according to the technical concept of the invention described in the following claims. Explanation of the symbols

[0054] 100 : Valve body 200 : Body seat 300 : Rotary drive unit 310 : Rotation axis 400 : Disk 410 : First coating protrusion 420 : Second coating protrusion 430 : Yohombu 500 : Elastic seal 510 : Incision groove 520 : Elastic support groove 530 : Elastomer 540 : Contact member

Claims

Claim 1 A grooved rubber sheet wafer-type butterfly valve characterized by comprising: a valve body; a body seat provided on the inner surface of the valve body; a rotary drive unit including a rotating shaft installed through the valve body and a driving means coupled to the end of the rotating shaft to provide rotational force to the rotating shaft; and a disc provided inside the valve body to open and close a flow path inside the valve body, the disc having elastic rubber coated on its surface to seal the flow path by adhering to the inner surface of the body seat. Claim 2 A groove rubber sheet wafer-type butterfly valve according to claim 1, wherein the disc comprises: a first coated protrusion that is coated with rubber and protrudes extending from the front to a part of the side; a second coated protrusion that is coated with rubber and protrudes extending from the rear to a part of the side; and a groove portion that is not coated on the side between the first coated protrusion and the second coated protrusion and forms a groove. Claim 3 A groove rubber sheet wafer-type butterfly valve characterized in that, in paragraph 2, the body sheet is formed to protrude on the inner surface to correspond to the shape of the groove and is elastically supported, and further comprises an elastic sealing part that is compressed and restored according to the pressure applied by the rotation of the disk. Claim 4 In claim 3, the elastic sealing member comprises: a cut groove having a predetermined depth formed along both inner circumferential surfaces of the body sheet with respect to the rotation axis; a plurality of elastic support grooves formed at regular intervals along the inner circumferential surface of the body sheet and communicating with the cut groove; an elastic body mounted in the elastic support groove; and a contact member provided on the cut groove, formed so that a portion thereof is exposed to the outside and inserted into the groove, with its bottom surface coupled to the elastic body and elastically supported.

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