WO2022220363A1

WO2022220363A1 - Anti-corrosion butterfly valve having integrated valve seat and flange

Info

Publication number: WO2022220363A1
Application number: PCT/KR2021/017610
Authority: WO
Inventors: 김은석; 하봉연
Original assignee: 신진정공(주)
Priority date: 2021-04-14
Filing date: 2021-11-26
Publication date: 2022-10-20
Also published as: KR102316746B1

Abstract

Disclosed is an anti-corrosion butterfly valve having an integrated valve seat and flange, wherein the butterfly valve is installed in a joint connection region between water pipes buried underground and is for controlling fluid flow inside the water pipes when a valve disk rotates. The anti-corrosion butterfly valve having an integrated valve seat and flange according to an embodiment disclosed herein is characterized by comprising: a non-metallic valve housing which has a flow path formed therein and is open at both ends; a valve disk which is rotatably installed inside the valve housing and opens and closes the flow path while rotating; a driving shaft and an auxiliary shaft which pass through the valve housing in a radial direction and are fixed to a shaft-supporting part of the valve disk, and which rotatably support the valve disk; a first flange which is pressed against a flange on one side surface of the valve housing and thereby mounted by a first fastening member; and a second flange which is pressed against a flange on the other side surface of the valve housing and thereby mounted by the first fastening member, wherein a valve seat that is sealed by bringing one end of a disk seat of the valve disk into surface contact therewith extends integrally from the second flange.

Description

Anti-corrosion butterfly valve with integral valve seat and flange

The present specification relates to a butterfly valve, and to be more specific, a valve seat and a flange installed at a joint connection between a water supply pipe and a water supply pipe buried underground to control the flow of fluid inside the water supply pipe when the valve disk rotates It relates to an anti-corrosion butterfly valve incorporating

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

In general, the butterfly valve connecting the water supply pipe and the water supply pipe buried in the ground through a joint connection includes a cylindrical valve housing in which a fluid passage is formed,

A disk-shaped valve disc rotatably formed in the valve housing to open and close the fluid passage, and

A ring-shaped valve seat placed between the inner circumferential surface of the valve housing and the outer circumferential surface of the valve disk for sealing;

It is connected to the valve disk by passing through the valve housing in a radial direction, and has a driving shaft and an auxiliary shaft for rotating the valve disk by driving an external actuator.

Although not shown in the drawing, the butterfly valve published in Patent Registration No. 10-1678171 can effectively manufacture a large-sized butterfly valve by molding the butterfly valve with a high-strength synthetic resin material, and Even when transferring a fluid, it has the advantage of maintaining corrosion resistance.

On the other hand, the butterfly valve described above combines a key corresponding to the keyway and the engaging groove formed in the housing body so that the housing body has durability against the fluid pressure passing through the inside of the valve housing and the fixing clip. However, the strength of the key and the fixing clip is not sufficient, and the durability is deteriorated.

In addition, there is a problem accompanying the inconvenience of separately mounting the valve seat on the outer circumferential surface of the valve disc to seal the gap between the inner circumferential surface of the valve housing and the outer circumferential surface of the valve disc.

The registration of a butterfly valve is announced in Republic of Korea Patent Publication No. 10-1678171.

The embodiment of the present specification relates to a corrosion-resistant butterfly valve in which the valve seat and the flange are integrally formed so that the operation process of separately mounting the valve seat to the flange is unnecessary by forming the valve seat and the valve flange integrally.

The embodiment of the present specification is a corrosion-resistant butterfly valve in which the valve seat and the flange are integrated so that the valve seat and the body are completely isolated from the inner surface of the valve housing in the butterfly valve open mode due to the use of double eccentricity (2 offset) is related to

In the embodiment of the present specification, the fixing bolts arranged in the circumferential direction to mount the valve flange on the left and right sides of the valve housing support the outer surface of the valve housing so as to have durability against water pressure generated when the valve is closed, the valve seat and flange Corrosion-resistant butterfly valves incorporating

According to an embodiment of the present specification to achieve the above and other purposes of the present specification,

The flow path is formed therein, both ends are formed to be open, the valve housing of a non-metal material;

a valve disk rotatably installed in the valve housing and configured to open and close the flow path during rotation;

a driving shaft and an auxiliary shaft passing through the valve housing in a radial direction and fixed to a bearing portion of the valve disk and rotatably supporting the valve disk;

a first flange attached to one side flange of the valve housing and mounted by a first fastening member;

and a second flange in close contact with the flange of the other side of the valve housing, mounted by the first fastening member, and extending integrally with a valve seat sealed by surface contact with the disk seat end of the valve disk. To provide an anti-corrosion butterfly valve in which a valve seat and a flange are integrated.

According to another embodiment of the present specification to achieve the above and other purposes of the present specification,

a first flange mounted in close contact with a flange of one side of the valve housing;

a second flange mounted in close contact with the flange of the other side of the valve housing and integrally extending with a valve seat sealed by surface contact with the disk seat end of the valve disk;

Both ends are screwed into a first fastening hole repeatedly formed in the first flange in the circumferential direction, and a second fastening hole repeatedly formed in the second flange in a circumferential direction opposite to the first fastening hole, and both sides of the valve housing a first fastening member for supporting the outer circumferential surface of the body of the valve housing in a circumferential direction when the first and second flanges are closely contacted to each other;

The first and second flanges formed outside the first concentric circle in which the first and second fastening holes are formed in the first and second flanges so that the flanges of the first and second water supply pipes can be jointly connected to the outer surfaces of the first and second flanges. Corrosion prevention butter that integrates the valve seat and flange, characterized in that it is formed in two concentric circles and is fastened to the third and fourth fastening holes respectively located on the left and right sides of the first and second fastening holes. Fly valves are provided.

The corrosion protection butterfly valve in which the valve seat and the flange are integrated according to the embodiment of the present specification having the above configuration has the following advantages.

As the valve seat and the valve flange are integrally formed, it is possible to improve the workability of assembling the valve because the operation process of separately mounting the valve seat, which is detachably and sealed from the disk seat of the valve disk, to the flange is unnecessary.

In addition, when the butterfly valve is switched to the open mode due to the use of double eccentricity, the valve seat and body are completely isolated from the inner surface of the valve housing, so that the butterfly valve can be easily opened and closed with little force. .

In addition, as the fixing bolts for fastening the valve flange on the left and right sides of the valve housing are arranged in the circumferential direction to support the outer surface of the valve housing, the thickness of the valve housing is increased in the radial direction to have durability against the water pressure generated when the butterfly valve is closed. have the effect of making

1 is a view of an anti-corrosion butterfly valve incorporating a valve seat and a flange according to a preferred embodiment of the present specification;

Figure 2 is an exploded perspective view of the butterfly valve shown in Figure 1;

3 is a plan view of the butterfly valve shown in FIG. 1;

4 is a cross-sectional view taken along the line A-A in the butterfly valve shown in FIG. 1;

5 is a cross-sectional view taken along the line B-B in the butterfly valve shown in FIG. 1;

Figure 6 (a, b) is an enlarged view of the drive shaft and the auxiliary shaft of Figure 4 in the butterfly valve shown in Figure 1,

Fig. 7 is a schematic view of the use state of the corrosion-resistant butterfly valve in which the valve seat and flange shown in Fig. 1 are integrated.

Hereinafter, an anti-corrosion butterfly valve in which a valve seat and a flange are integrated according to a preferred embodiment of the present specification will be described in detail with reference to the accompanying drawings.

1 to 7, the corrosion prevention butterfly valve (B) in which the valve seat and the flange are integrated according to an embodiment of the present specification has a flow path formed therein, both ends are open, and non-metal for corrosion prevention Cylindrical valve housing 10 formed of ash;

The actuator (A) is installed rotatably within 90 degrees in the valve housing 10 by driving the valve disc (valve disc) 11 for opening and closing the flow path during rotation;

a drive shaft 14 and an auxiliary shaft 15 that radially penetrate the valve housing 10 and are fixed to the bearing

portions

12 and 13 of the valve disk 11 and rotatably support the valve disk 11;

a first flange 18 attached to one side flange 16 of the valve housing 10 and mounted by a first fastening member 17;

A valve seat (20a) that is closely attached to the flange (19) of the other side of the valve housing (10), is mounted by the first fastening member (17), and is sealed with the end of the disk seat (11a) of the valve disk (11) in surface contact. It characterized in that it comprises a; the second flange 20 is formed to extend integrally.

1 to 7, the corrosion prevention butterfly valve (B) in which the valve seat and flange are integrated according to another embodiment of the present specification has a flow path formed therein, both ends are open, and non-metal for corrosion prevention a valve housing 10 formed of ash;

The actuator (A) is installed rotatably within 90 degrees to the valve housing 10 by driving the valve disk 11 for opening and closing the flow path during rotation;

portions

12 and 13 of the valve disk 11 and rotatably support the valve disk 11;

a first flange 18 mounted in close contact with one side flange 16 of the valve housing 10;

A second flange that is mounted in close contact with the flange 19 of the other side of the valve housing 10 and that the valve seat 20a, which is sealed by surface contact with the end of the disk seat 11a of the valve disk 11, is integrally extended. (20);

A first fastening hole 24 that is repeatedly formed in the circumferential direction on the inner surface of the first flange 18, and a first fastening hole 24 that is repeatedly formed in the circumferential direction on the inner surface of the second flange 20 opposite to the first fastening hole 24 Both ends are screwed into the second fastening hole 25, and when fastening the first and

second flanges

18 and 20 to both

side flanges

16 and 19 of the valve housing 10, the body of the valve housing 10 ( 10a) a first fastening member 17 for supporting the outer circumferential surface in the circumferential direction;

The first and

second flanges

18 and 20 so that the

flanges

28 and 29 of the first and

second water pipes

26 and 27 are closely attached to the outer surfaces of the first and

second flanges

18 and 20 to be jointly connected. The first and second fastening holes 24 and 25 (screw holes) are formed in the second concentric circle formed outside the first concentric circle, and located on the left and right sides of the first and

second fastening holes

24 and 25, respectively and a second fastening member 32 fastened to the third and fourth fastening holes 30 and 31 (through holes).

According to a more preferred embodiment, as shown in FIGS. 1 and 5, the first fastening member 17 can be prevented from loosening from the first and second flanges 18 and 20. ) for preventing loosening nuts 21 coupled to both sides of; characterized in that it further comprises.

For this reason, the first and second flanges 18 by the anti-loosening nut 21 coupled to both sides of the first fastening member 17 due to the impact caused by the water pressure generated inside the above-described butterfly valve (B). .

That is, as both ends of the first fastening member 17 are coupled to the first and

second fastening holes

24 and 25 of the aforementioned first and

second flanges

18 and 20 and fastened at the same time, the The first loosening phenomenon can be prevented. In addition, it is possible to prevent the secondary loosening of the first fastening member 17 by the above-described anti-loosening nut 21 .

2, 5, 6A, 6B, the first flange 18 and the above-described first flange 18 and the valve housing 10 are mounted on the mutual contact surface of the body 10a, the first from the valve housing 10 at least one first O-ring 22 for preventing leakage through the gap between the flange 18 and the body 10a;

It is mounted on the mutual contact surface of the above-described second flange 20 and the body 10a of the valve housing 10, and the gap between the second flange 20 and the body 10a from the valve housing 10 is closed. It characterized in that it further comprises; at least one second O-ring 23 for preventing leakage through.

For this reason, when the aforementioned valve disk 11 is switched to the closed mode and water pressure is generated inside the butterfly valve B, the first and

second flanges

18 and 20 and the body 10a of the valve housing 10 ), it is possible to prevent the tap water from being lost due to leakage through the gap between the mutual contact surfaces described above by the first and second O-

rings

22 and 23 mounted on the mutual contact surfaces.

As in FIGS. 1, 2, 3, 4, 6a, and 6b, the wing-type first and second extension pieces ( 100a, 100b) (200a, 200b);

The wing-type first and

second extension pieces

100a, 100b) (200a, 200b) are seated between the wing-type first and second extension pieces (100a, 100b) (200a, 200b) by means of a fastening member (not shown). It is mounted on the, rotatably supports the drive shaft 14 and the auxiliary shaft 15, the first flange 18 by the rotational force generated when the valve disk 11 is rotated toward the second flange 20, or , or a driving shaft support 100 and an auxiliary shaft support 200 for preventing the second flange 20 from being torsionally deformed toward the first flange 18; characterized in that it further comprises.

For this reason, the drive shaft 14 and the auxiliary shaft 15 by the bearing

portions

12 and 13 of the valve disk 11 and the drive shaft support portion 100 and the auxiliary shaft support portion 200 when the above-described valve disk 11 is rotated. ) is rotatably supported.

At this time, the first flange 18 or the second flange 20 is the opposite side flange (the second flange 20 or the first flange 18) by the rotational force generated when the above-described valve disk 11 is rotated. It is possible to prevent the torsional deformation toward the drive shaft support part 100 and the auxiliary shaft support part 200 .

Therefore, when the above-described valve disk 11 is rotated, the valve housing ( 10) can accurately close the internal passage.

On the other hand, the corrosion prevention butterfly valve in which the valve seat and the flange are integrated according to the embodiment of the present specification is a double eccentric (2 offset) valve, by rotating the valve disk 11 to turn the butterfly valve (B) into an open mode When switching, the disk seat 11a of the valve disk 11 and the outer ends of the

bearings

12 and 13 supporting the drive shaft 14 and the auxiliary shaft 15 are completely separated from the inner surface of the valve housing 10 . isolate

For this reason, the butterfly valve can be opened and closed by easily rotating the valve disk 11 with a small force.

Although not shown in the drawing, the concentric valve (1 offset) compared to the above-described double eccentric valve has a disk seat of the valve disk spaced apart from the inside of the valve housing when the valve disk is switched to the open mode. On the other hand, the outer end of the bearing for supporting the drive shaft and the auxiliary shaft maintains a state fixed to the inner surface of the valve housing.

For this reason, a lot of external force is required to rotate the valve disk to open and close the butterfly valve.

Hereinafter, an anti-corrosion butterfly valve in which the valve seat and the flange are integrated according to an embodiment of the present specification will be described with reference to the accompanying drawings.

1 to 7, the above-described actuator (A) radially penetrates through the through hole (10b) of the valve housing (10) and the drive shaft ( As the valve disk 11 is rotated by driving 14) (At this time, one end of the auxiliary shaft 15 penetrates the through hole 10c of the valve housing 10 in the radial direction, and the bearing portion of the valve disk 11 is (13) integrally connected) A manual method of opening and closing the flow path inside the valve housing 10 may be used.

At this time, opening and closing the flow path inside the valve housing 10 by rotating the valve disk 11 at an arbitrary angle by the driving shaft 14 and the auxiliary shaft 15 when the actuator (A) is driven as described above, and the second Since the description of mounting the valve seat 20a integrally formed on the flange 20 and the detachably sealing disk seat 11a to the valve disk 11 is commonly used in the technical field to which this specification belongs, their configuration and detailed description of the operation will be omitted.

In a state in which the first flange 18 and the second flange 20 are in close contact with the left and

right flanges

16 and 19 of the cylindrical valve housing 10 constituting the butterfly valve B described above, left-handed screws and The first fastening member 17 having a right-hand screw is screwed into the first and second fastening holes 24 and 25 (screw holes) formed to face the inner surfaces of the first and

second flanges

18 and 20 and fastened. Accordingly, it is possible to fix the first and

second flanges

18 and 20 in close contact with the left and

right flanges

16 and 19 of the valve housing 10 .

At this time, as the protrusion 10d of the valve housing 10 is formed to be larger than the recess 20b of the second flange 20 corresponding thereto, heat is applied to the protrusion 10d to the valve housing 10 with the second flange When (20) is fastened, the protrusion (10d) in close contact with the second flange (20) is compressed to seal the gap between the valve housing (10) and the second flange (20).

When the second flange 20 is brought into close contact with the flange 19 of the above-described valve housing 10 and fastened by the first fastening member 17 , the disk seat 11a of the valve disk 11 is connected to the second flange. It is in close contact with the valve seat (20a) integrally formed with the (20).

Accordingly, it is possible to close the flow path formed inside the valve housing 10 (that is, the movement of the fluid flowing along the first and second

water supply pipes

26 and 27 is temporarily stopped).

As described above, the valve seat 20a, which is detachably attached to the disk seat 11a of the valve disk 11 and opens and closes the internal flow path of the valve housing 10, is integrally extended to the second flange 20, 2 It is possible to reduce the work process of separately mounting the valve seat (20a) to the flange (20). In addition, since a separate valve seat is unnecessary, it has the effect of reducing the number of parts of the butterfly valve.

On the other hand, as the aforementioned valve disk 11 is rotated at an arbitrary angle to switch to the closed mode, even when water pressure of an arbitrary pressure acts in the radial direction on the body 10a of the valve housing 10 The body 10a has durability.

To describe this in detail, the first fastening member 17 fastened by closely attaching the first and

second flanges

18 and 20 to the left and

right flanges

16 and 19 of the above-described valve housing 10 is the valve housing 10 . The outer surface of the body (10a) of the circumferential direction is supported.

The first fastening member 17 described above is screwed into the first and second fastening holes 24 and 25 formed in the first concentric circles of the first and

second flanges

18 and 20 .

Therefore, due to the closing mode of the valve disk 11, the hydraulic pressure acting in the radial direction toward the body 10a of the valve housing 10 is applied to the first fastening member 17 that supports the outer circumferential surface of the body 10a in the circumferential direction. (that is, when the valve disk 11 is switched to the closing mode, the thickness of the body 10a is increased so that the first fastening member 17 has durability against the water pressure acting on the body 10a. have an effect).

On the other hand, the first and second flanges 18 on the left and

right flanges

16 and 19 of the valve housing 10 between the

flanges

28 and 29 of the first and second

water supply pipes

26 and 27 having a large diameter buried underground. , 20) and insert the butterfly valve (B) fastened by the first fastening member (17).

In a state in which the

flanges

28 and 29 of the first and

second water pipes

26 and 27 and the first and

second flanges

18 and 20 of the butterfly valve B are in close contact, the first and second flanges 18, 20), the first water pipe 26 and the second water pipe 26 using the butterfly valve (B) as fastened by a plurality of second fastening members 32 coupled to the third and fourth fastening holes 30 and 31. The water supply pipe 27 may be jointly connected.

At this time, fastening holes (not shown) corresponding to the third and fourth fastening holes 30 and 31 are formed through the

flanges

28 and 29 of the first and

second water pipes

26 and 27 .

The above-described second fastening member 32 is screwed to the first fastening member 17 which is fastened by contacting the first and

second flanges

18 and 20 to the left and

right flanges

16 and 19 of the valve housing 10 . The first and second fastening holes 24 and 25 (screw holes) formed in the first and

second flanges

18 and 20 to be concentric with the first concentric circles are formed in the second concentric circles formed outward, and the first fastening member (17) is coupled to and fixed to the third and fourth fastening holes 30 and 31 (through holes) respectively located on the left and right of the first and second fastening holes 24 and 25 to which they are fastened.

Here, although the foregoing specification has been described with reference to preferred embodiments, those skilled in the art can variously modify and modify the present specification without departing from the spirit and scope of the present specification as set forth in the following claims. You will understand that you can change it.

[Explanation of code]

10; valve housing

10a; body

11; valve disc

11a; disk sheet

12; bearing part

13; bearing part

14; driving axle

15; auxiliary shaft

16; Flange of valve housing

17; first fastening member

18; first flange

19; Flange of valve housing

20; 2nd flange

20a; valve seat

21; Anti-loosening nut

22; 1st O-ring

23; 2nd O-ring

24; 1st fastening hole

25; 2nd fastening hole

26; 1st water pipe

27; 2nd water pipe

28; Flange of the first water supply pipe

29; Flange of the second water pipe

30; 3rd fastener

31; 4 fastening hole

32; second fastening member

Claims

A flow path is formed therein, both ends are formed to be open, the non-metallic corrosion prevention valve housing;

a valve disk rotatably installed in the valve housing and configured to open and close the flow path during rotation;

a driving shaft and an auxiliary shaft passing through the valve housing in a radial direction and fixed to a bearing portion of the valve disk and rotatably supporting the valve disk;

a first flange attached to one side flange of the valve housing and mounted by a first fastening member;

and a second flange in close contact with the flange of the other side of the valve housing, mounted by the first fastening member, and extending integrally with a valve seat sealed by surface contact with the disk seat end of the valve disk. Anti-corrosion butterfly valve with integral valve seat and flange.
The flow path is formed therein, both ends are formed to be open, the valve housing of a non-metal material;

a valve disk rotatably installed in the valve housing and configured to open and close the flow path during rotation;

a driving shaft and an auxiliary shaft passing through the valve housing in a radial direction and fixed to a bearing portion of the valve disk and rotatably supporting the valve disk;

a first flange mounted in close contact with a flange of one side of the valve housing;

a second flange mounted in close contact with the flange of the other side of the valve housing and integrally extending with a valve seat sealed by surface contact with the disk seat end of the valve disk;

Both ends are screwed into a first fastening hole repeatedly formed in the first flange in the circumferential direction, and a second fastening hole repeatedly formed in the second flange in a circumferential direction opposite to the first fastening hole, and both sides of the valve housing a first fastening member for supporting the outer circumferential surface of the body of the valve housing in a circumferential direction when the first and second flanges are closely contacted to each other;

The first and second flanges formed outside the first concentric circle in which the first and second fastening holes are formed in the first and second flanges so that the flanges of the first and second water supply pipes can be jointly connected to the outer surfaces of the first and second flanges. Corrosion prevention butter that integrates the valve seat and flange, characterized in that it is formed in two concentric circles and is fastened to the third and fourth fastening holes respectively located on the left and right sides of the first and second fastening holes. fly valve.
According to claim 1,

Corrosion in which the valve seat and the flange are integrated with the valve seat and the flange, characterized in that the first fastening member is further provided with an anti-loosening nut coupled to both sides of the first fastening member to prevent the first fastening member from loosening from the first and second flanges. Anti-butterfly valve.
3. The method of claim 2,

Corrosion in which the valve seat and the flange are integrated with the valve seat and the flange, characterized in that the first fastening member is further provided with an anti-loosening nut coupled to both sides of the first fastening member to prevent the first fastening member from loosening from the first and second flanges. Anti-butterfly valve.
According to claim 1,

at least one first O-ring mounted on the contact surface of the first flange and the body of the valve housing and preventing water leakage from the valve housing through a gap between the first flange and the body of the valve housing;

at least one second O-ring mounted on the mutual contact surface of the second flange and the body of the valve housing, and for preventing water leakage from the valve housing through the gap between the second flange and the body of the valve housing; A corrosion-resistant butterfly valve in which the valve seat and the flange are integrated.
3. The method of claim 2,

at least one first O-ring mounted on the contact surface of the first flange and the body of the valve housing and preventing water leakage from the valve housing through a gap between the first flange and the body of the valve housing;

at least one second O-ring mounted on the mutual contact surface of the second flange and the body of the valve housing, and for preventing water leakage from the valve housing through the gap between the second flange and the body of the valve housing; A corrosion-resistant butterfly valve in which the valve seat and the flange are integrated.
According to claim 1,

wing-type first and second extension pieces formed to face the outer surfaces of the first and second flanges;

It is seated between the wing-type first and second extension pieces and is mounted on the wing-type first and second extension pieces by a fastening member, rotatably supports the driving shaft and the auxiliary shaft, and rotational force generated when the valve disk rotates A drive shaft support and auxiliary shaft support for preventing the first flange from being torsionally deformed toward the second flange or the second flange by the valve, characterized in that it further comprises a valve Anti-corrosion butterfly valve with integrated seat and flange.
3. The method of claim 2,

wing-type first and second extension pieces formed to face the outer surfaces of the first and second flanges;

It is seated between the wing-type first and second extension pieces and is mounted on the wing-type first and second extension pieces by a fastening member, rotatably supports the driving shaft and the auxiliary shaft, and rotational force generated when the valve disk rotates A drive shaft support and auxiliary shaft support for preventing the first flange from being torsionally deformed toward the second flange or the second flange by the valve, characterized in that it further comprises a valve Anti-corrosion butterfly valve with integrated seat and flange.