WO2021075603A1

WO2021075603A1 - Valve actuating device

Info

Publication number: WO2021075603A1
Application number: PCT/KR2019/013678
Authority: WO
Inventors: 노창환
Original assignee: (주)코사플러스
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2021-04-22

Abstract

The present invention relates to a valve actuating device, comprising: a housing body having a space portion formed therein and having a socket fastened to one surface thereof such that pneumatic pressure is supplied thereto; a driving member in which a pair of pistons, capable of reciprocating movement by means of the pneumatic pressure supplied through the socket, are installed in the space portion; and a drive shaft member having a shaft rotatably installed by the reciprocating movement of the pair of pistons, a crank provided in the shaft, and a stopper for restricting rotation of the shaft such that the shaft rotates by a set angle. Accordingly, the present invention can obtain the effects of making it possible to easily and visually confirm whether a valve opens or closes by means of an indicator, rotate the stopper at a minimum of 45 and a maximum of 100 when the valve closes or opens by a stopper bolt so as to adjust the angle at which the valve opens and closes to a maximum of 100 or so as to have an open angle of 45 in a closed state or a closed angle of 45 in a maximum open state, and rotate the shaft stably and smoothly for a long period of time by means of a DU bushing and a wear-resistant washer even with frequent rotation of the shaft.

Description

Valve opening and closing device

The present invention relates to a valve opening/closing device, and more particularly, to a valve opening/closing device for smoothly rotating a driving shaft member during a reciprocating movement of a driving member driven by pneumatic pressure.

In general, in a pipeline for conveying fluid such as a chemical plant facility or a gas or oil conveying line, in order to control the flow rate, a pneumatic, hydraulic or electric actuator is installed on the valve of the pipeline to automatically open and close the valve.

A butterfly valve may be employed as a valve for opening and closing such a fluid channel, and the butterfly valve is rotatably installed in a valve housing provided with an annular valve seat.

The rotating shaft supporting the valve disk protrudes to the outside of the valve housing and rotates with the drive unit to open and close the pipes connected to both sides of the valve housing, and the opening and closing angle of the valve is controlled by the valve opening/closing device.

The recent valve actuator drive system is designed to transmit 90° rotational power of the rotary shaft of the butterfly valve. That is, in the valve actuator driving device, a separate driving drum is mounted on the rotation axis of the butterfly valve, and the rotational force of the rotation axis is a driven drum disposed in a direction perpendicular to the driving drum (that is, in the 90° direction). It is connected by a gear or scotch and a yoke, and a rack gear, and the rotational force of a driving drum is transmitted to the driven drum by the gear, and this driven drum is configured to rotate.

For example, a "valve opening and closing device" is disclosed in Patent Document 1 below.

The valve opening/closing device according to the following Patent Document 1 includes a housing having an accommodation space therein, a driving unit installed in the receiving space of the housing, and coupled with a driving gear, a driving rotating member having a driving rotating gear meshed with the driving gear, A driving cover member disposed above the driving rotating member and rotating according to the rotation of the driving rotating member, disposed inside the driving cover member, and having a through hole formed therein, and vertically by rotation of the driving cover member. A valve driving member that operates as a valve driving member, a valve control member coupled to a lower portion of the valve, and coupled to move up and down in a through hole of the valve driving member, and a valve coupled to a lower portion of the housing and coupled to a pipe on which the valve is installed It includes a coupling member.

In the following Patent Document 2, a'valve opening and closing device' is disclosed.

The valve opening/closing device according to the following patent document 2 includes a housing having an accommodation space therein, a driving part installed in the receiving space of the housing and coupled with a driving gear, a driving rotating member having a driving rotating gear engaged with the driving gear, and the A driving cover member disposed on the upper portion of the driving rotating member and rotating according to the rotation of the driving rotating member, a valve is coupled to the lower portion thereof, and disposed inside the driving cover member, and moving up and down by rotation of the driving cover member. A valve driving member that operates, a valve coupling member that is rotatably coupled to an upper portion of the housing, a control handle that rotates according to the rotation of the drive cover member, and a valve coupling member coupled to the lower portion of the housing and coupled to the tube on which the valve is installed Includes.

The valve driving member includes a roller installed on one side, and the driving cover member has a space with an open top therein, a body having a through hole through which the valve driving member passes, and an inner bottom surface of the body And a protruding guide formed to surround the through hole.

It is an object of the present invention to provide a valve opening/closing device for smoothly driving the valve opening/closing device.

Another object of the present invention is to provide a valve opening/closing device capable of visually checking an open or closed state of a valve according to a valve drive.

Another object of the present invention is to provide a valve opening and closing device capable of rotating the rotation angle of the shaft to a limiting angle.

Another object of the present invention is to provide a valve opening/closing device that increases the durability of a valve opening/closing device by using a DU bushing, a snap ring, and a 3-stage washer, and increases convenience and miniaturization due to a wide control range of the driving device. will be.

In order to achieve the object as described above, the valve opening and closing device according to the present invention includes a housing body 10 having a space 11 formed therein, and having a socket 12 fastened so that pneumatic pressure is supplied to one surface thereof; A driving member 20 having a pair of pistons 21 installed in the space 11 to enable reciprocating movement by pneumatic pressure supplied through the socket; The shaft 41 is rotatably installed by the reciprocating movement of the pair of pistons 21, the crank 44 provided on the shaft 41, and the shaft 41 is rotated by a set angle. It characterized in that it includes; a drive shaft member 40 provided with a stopper 48 for limiting the rotation of the shaft 41.

Further includes an indicator 60 installed on the upper surface of the housing body 10 so as to check the opening and closing according to the rotation of the driving shaft member 40, wherein the indicator 60 is an indicator body formed in a cap shape (61); And an indicator key 62 coupled to the indicator body 61 so as to check the open/closed state of the driving shaft member 40, wherein the indicator key 62 has a first color having the same color as that of the body. It characterized in that it consists of an indicator key 63 and a second indicator key 64 formed in a color different from that of the body.

The driving member 20 has a piston body 22 formed to reciprocate the space 11 by the pneumatic pressure introduced through the socket 12, and protrude to one side of the piston body 22. A piston 21 consisting of a pair of piston legs 23 formed therein, and a coupling hole 24 formed so that the fixing pin 26 is coupled to the piston leg 23; A fixing pin 26 coupled to the coupling hole 24; It characterized in that it comprises a; a retaining pin (26) coupled to the piston (21) is coupled to the retaining pin (26) so that it is coupled so as not to be separated.

The piston 21 has a concave groove 25 formed on the other side of the piston body 22 so that the head of the fixing bolt 30 is concave to prevent interference with the fixing bolt 30. It is done.

The stopper 48 includes a stopper body 49 formed in a predetermined shape; A coupling hole 50 formed so that the stopper body 49 is coupled to the shaft; A locking portion 51 protruding from both sides of the stopper body 49 so that the shaft 41 rotates at a limited angle when the shaft 41 is rotated; Including, the inclined surface 52 formed on one surface of the locking part 51 so that the shaft 41 can be rotated at an angle of 45 to 100 ㅀ in the closed or open state, and interference with the crank 44 It is characterized in that the interference preventing groove (49a) formed in the stopper body is formed so as not to occur.

The housing body 10 further includes a stopper bolt 15 fastened to the housing body 10 so that the stopper 48 rotates within a limited angle, wherein the stopper bolt 15 includes the housing body ( 10) a threaded portion (15a) formed in a predetermined length to be fastened; It is characterized in that it is formed at the end of the screw portion (15a) so as to limit the rotation of the stopper (48) and is formed of a stopper portion (15b) extending by a predetermined length.

The housing body 10 is provided with a DU bushing 16 that prevents abrasion of the housing body 10 while smoothly rotating the shaft 41, and the DU bushing 16 is a hollow metal made of metal. It is formed of a cylindrical body, characterized in that the Teflon coating is made on the inner surface of the cylindrical body.

The abrasion-preventing washer 17 includes a first washer part 17a formed of a metal material having a predetermined thickness to prevent abrasion while allowing the shaft 41 to rotate smoothly; A second washer part 17b formed of a plastic material having a predetermined thickness on the upper surface of the first washer part 17a; It consists of a third washer part 17c formed of a metal material having a predetermined thickness on the upper surface of the second washer part 17b, so that the shaft 41 and the indicator 60 rotate smoothly. It characterized in that it comprises a; snap ring 27 installed on the upper surface of the DU bushing (16).

An airtight member 19 for maintaining airtightness of the housing body 10 is installed on the inner surface of the housing body 10, and the airtight member 19 is formed of a disc having a predetermined diameter. ; An uneven portion (19b) extending in a round shape on the outside of the airtight body (19a); It characterized in that it consists of; an airtight plate (19c) formed integrally extending outside the uneven portion (19b).

As described above, according to the valve opening/closing device according to the present invention, it is possible to easily check whether the valve is opened or closed by the indicator, and the stopper at a minimum of 45° and a maximum of 100° in the closed or open state of the valve by the stopper bolt. Can be rotated, and thus, the angle at which the valve opens and closes can be adjusted to a maximum of 100°, or the opening angle of 45° in the closed state or the closing angle of 45° in the maximum open state. And it is possible to stably and smoothly rotate the shaft for a long period of time by the abrasion-preventing washer is obtained.

In addition, according to the valve opening and closing device according to the present invention, the shaft can be rotated satisfactorily by the crank and the rack and the pinion rotated by the piston, the fixing pin can be kept in a stable coupled state by the snap ring, and the airtight member As a result, the airtightness of the space is increased and the driving of the shaft can be more stably driven.

1 is an exploded three-dimensional view showing a valve opening and closing device according to a first embodiment of the present invention,

Figure 2 is an exploded three-dimensional view showing a valve opening and closing device according to a first embodiment of the present invention,

3 is an enlarged cross-sectional view showing a valve opening and closing device according to a first embodiment of the present invention;

4 is a cross-sectional view showing a valve opening and closing device according to a first embodiment of the present invention;

5 is a plan sectional view showing an open state of the valve opening and closing device according to the first embodiment of the present invention;

6 is a plan sectional view showing a closed state of the valve opening and closing device according to the first embodiment of the present invention;

7 is a plan sectional view showing a state in which the rotation angle of a stopper is adjusted by a stopper bolt according to an embodiment of the present invention;

8 is an example of an angle of an open or closed state in an open and closed state when the rotation angle of a stopper is limited by a stopper bolt according to an embodiment of the present invention.

9 is a cross-sectional view showing a valve opening and closing device according to a second embodiment of the present invention;

10 is a plan sectional view showing an open state of a valve opening and closing device according to a second embodiment of the present invention;

11 is a plan sectional view showing a closed state of the valve opening and closing device according to a second embodiment of the present invention;

Hereinafter, a valve opening/closing device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The valve opening and closing device according to a preferred embodiment of the present invention has a space part 11 formed therein, and a housing body 10 to which the socket 12 is fastened so that the pneumatic pressure is supplied to one side, and the pneumatic pressure supplied through the socket A drive member 20 in which a pair of pistons 21 is installed in the space 11 so as to be reciprocated by, and a shaft 41 that is rotatably installed by reciprocating movement of the pair of pistons 21 Wow, a drive shaft member 40 provided with a crank 44 provided on the shaft 41 and a stopper 48 for restricting the rotation of the shaft 41 so that the shaft 41 is rotated by a set angle. , And an indicator 60 installed on the upper surface of the housing body 10 so as to check the opening and closing according to the rotation of the driving shaft member 40.

1 is an exploded three-dimensional view showing a valve opening and closing device according to a first preferred embodiment of the present invention, and FIG. 2 is an exploded three-dimensional view showing a valve opening and closing device according to a first preferred embodiment of the present invention, and FIG. 3 Is an enlarged cross-sectional view showing a valve opening and closing device according to a first embodiment of the present invention.

1 to 3, the housing body 10 has a predetermined space 11 formed inside so that the driving member 20 is installed, and the space in front of the housing body 10 The socket 12 is installed so that the pneumatic pressure is supplied into the part 11.

In addition, a fastening hole 13 is formed on one surface of the housing body 10 so that the stopper bolt 15 is fastened, and a shaft coupling hole 14 is formed on the upper surface of the housing body 10.

The stopper bolt 15 limits the rotation angle of the stopper 48 of the driving member 20 and is fastened to the fastening hole 13 so as to secure the rotation angle of the stopper 48.

The stopper bolt 15 is formed in a predetermined length at the end of the screw portion 15a fastened to the fastening hole 13, and a stopper portion 15b extending from the end of the screw portion 15a to a predetermined length is formed. Is formed integrally.

In addition, the stopper part (15b) can limit the rotation angle of the stopper (48) by forming either a short or long length of one of the two stoppers (15b) in a state in which the rotation angle of the stopper (48) is 90°. To be there.

The two stopper bolts 15 can be adjusted to open and close, respectively. By making these stopper bolts 15 have a certain interval and forming a stopper shape corresponding thereto, the angle adjustment range is It is done by expanding or contracting.

In other words, the driving angle required for a general valve is 0ㅀ~90ㅀ, but the clearance angle for user's convenience is the maximum by allowing rotation by more than 5ㅀ in the close direction and the open direction, respectively. The rotation angle can reach 100ㅀ, and by replacing any one of both stopper bolts 15 with a long one, it is possible to limit the rotation angle of 45ㅀ in the open and close directions.

DU bushings 16 are installed on both sides of the shaft coupling hole 14 of the housing body 10 so that the shaft 41 rotates smoothly. The DU bushing 16 is formed of a hollow cylindrical body made of a metal material having a predetermined diameter, and a Teflon coating is formed on the inner surface of the metal.

That is, the Teflon coating is made so that the shaft 41 rotates smoothly, and the friction coefficient is reduced by the Teflon coating so that the rotation of the shaft 41 is smoothly performed. It increases the durability.

These DU bushings 16 are inserted into the housing body 10 and are coated with Teflon on the inner side in contact with the shaft 41 to serve as a bearing to smoothly rotate the shaft 41 to prevent abrasion of the bushing itself. ) Is directed to one side to prevent air leakage.

In addition, a wear-preventing washer 17 is installed on the upper surface of the housing body 10 to prevent abrasion due to rotation of the shaft 41.

The wear-resistant washer 17 has a triple structure, and the lowermost layer in contact with the upper surface of the housing body 10 is a first washer part 17a formed of a predetermined thickness of a metal material, and the first washer part A second washer portion 17b formed with a predetermined thickness of a plastic material on the upper surface of (17a), and a third washer portion 17c having a predetermined thickness of a metal material on the upper surface of the second washer portion 17b. , Snap ring (17d) is installed on the upper surface of these wear-resistant washers (17).

The abrasion-preventing washer 17 made of the triple structure is made of three layers of metal, plastic, and metal, and prevents the shaft 41 from falling down by the snap ring 27, and when air is supplied, the shaft 41 is The force that the snap ring 27 rotates in the same direction as the shaft 41 while receiving downward force and the force that moves the shaft 41 downward are combined, so that the shape of the washer 17 is bent like a plate or the washer 17 and the housing The housing body 10 is damaged by the friction of the body 10, and the shape of the washer 17 is prevented by the metal washers 17a, 17c, and the plastic washer 17b in the middle It acts as a bearing so that the washer part 17a of the lowermost layer is not damaged.

An airtight member 19 for maintaining airtightness of the pneumatic pressure supplied to the space 11 is installed on the inner surface of the housing body 10. The airtight member 19 is made of a rubber material that is easily deformed in shape, and is in close contact with the housing body 10 by pneumatic pressure, so that the airtightness of the housing body 10 can be improved.

Such an airtight member 19 includes an airtight body 19a formed of a disk having a predetermined diameter, an uneven portion 19b extending from the airtight body 19a and formed in a substantially semicircular shape, and the uneven portion 19b ) Consisting of an airtight plate (19c) extending from.

That is, the airtight body 19a is formed in a flat plate so as to be in close contact with the housing body 10, and the uneven portion 19b has a'U' shape or a'∩' shape so that the airtight plate 19c can flow. It is formed, and the airtight plate (19c) is moved to the free end based on the uneven portion (19b) so that it is in close contact with the housing body (10) by pneumatic pressure.

1 and 2, a driving member 20 for driving the shaft 41 by the pneumatic pressure supplied through the socket 12 is installed inside the space 11.

The driving member 20 is installed to be symmetrically left and right around the shaft 41, and pistons 21 are installed on both left and right sides of the shaft 41, respectively.

The piston 21 includes a piston body 22 contacting the inner surface of the space 11 and a piston leg 23 integrally extending from the piston body 22.

In addition, a coupling hole 24 is formed in the piston leg 23 so that a fixing pin 26 for rotating the crank 44 is installed.

A roller 26a is coupled to the fixing pin 26 and is positioned in the fitting groove 26 of the crank 44 to reduce friction in the operating relationship between the fixing pin 26 and the crank 44.

Accordingly, when air is supplied while the rollers 26a coupled to the fixing pin 26 are caught in the grooves on both sides of the crank 44, the piston 21 is moved to both sides, and the rollers 26a of the fixing pin 26 are The crank 44 coupled to the shaft 41 rotates while pulling the crank 44 to the sides.

In addition, a concave groove 25 is formed on the other side of the piston body 22 so that the fixing bolt 30 is inserted therein.

The fixing pin 26 is installed on a pair of piston legs 23, and a snap ring 27 is installed on the upper and lower sides of the fixing pin 26 so that the fixing pin 26 is stably installed.

The snap ring 27 securely fixes the fixing pin 26 to the piston 21 so that the crank 44 can be better rotated when the piston 21 rotates.

The snap ring 27 securely fixes the fixing pin 26 to the piston 41 to prevent separation of the piston pin that may be caused by force during multiple rotations, and when the piston pin is separated from both sides, the housing It is in contact with the inner wall of the main body 10 so that the operation is not performed.

Figure 4 is a cross-sectional view showing a valve opening and closing device according to a first embodiment of the present invention, Figure 5 is a plan cross-sectional view showing a state in which the valve opening and closing device according to the first embodiment of the present invention is opened. 6 is a plan sectional view showing a closed state of the valve opening and closing device according to the first embodiment of the present invention, and FIG. 7 is a diagram illustrating a state in which the rotation angle of the stopper of the valve driving device according to the embodiment of the present invention is limited. It is a top view.

.

1 to 7, a spring cap 28 for compressing and fixing the spring 31 is installed outside the piston 21, and the spring cap 28 covers the spring cap 28. A through hole 29 through which the fixing bolt 30 penetrates is formed so as to be fixed to the 32.

The spring 31 is installed outside the spring cap 28, and a cover 32 is installed on the other side of the spring 31 so that the spring 31 is stably supported.

In addition, a shaft 41 of a driving shaft member 40 rotated according to a reciprocating motion of the piston 21 is rotatably installed between the pair of pistons 21.

The shaft 41 is formed with a predetermined length, a groove 42 is formed on the upper surface of the shaft 41 so that the indicator 60 is coupled, and a crank 44 coupled to the shaft 41 is centered. The lower roller 43 is coupled to the lower part.

In addition, a crank 44 rotated by a piston 21 is coupled to the shaft 41, and the crank 44 has a coupling hole 45 formed in the center so as to be coupled to the shaft 41, and the crank ( Fitting grooves 46 are formed on both sides of 44) so that the rollers 26a coupled to the fixing pins 26 can be inserted.

An upper roller 47 is coupled to an upper portion of the shaft 41, and a stopper 48 is coupled to an upper portion of the shaft 41 so that the shaft 41 rotates at a limited angle.

The stopper 48 includes a stopper body 49, a coupling hole 50 formed in the center of the stopper body 49 so as to be coupled to the shaft 41 at the center of the stopper body 49, and the stopper body 49 ), and an inclined surface 52 is formed to be inclined at a predetermined angle on one surface of the locking portion 51 and a locking portion 51 formed to protrude to both left and right sides of ).

The stopper body 49 is formed with an interference preventing groove (49a) to prevent interference with the stopper bolt (15).

The locking portions 51 are formed to protrude to both left and right sides of the stopper body 49 so as to be in contact with the stopper bolt 15. That is, the stopper 48 is rotated by the shaft 41, at which time the locking portion 51 of the stopper 48 contacts the stopper bolt 15 to stop the rotation of the shaft 41.

In addition, an indicator 60 for visually checking the rotational state of the driving shaft member 40 is installed on the upper surface of the housing body 10. This indicator 60 is formed in a substantially cap shape.

The indicator 60 includes an indicator body 61 formed in a cap shape and an indicator key 62 coupled to the indicator body 61.

The indicator key 62 is installed symmetrically up, down, left, and right to check whether the shaft is opened or closed according to the rotation of the shaft 41, and the indicator key 62 is a first indicator key 63 that is installed symmetrically to each other. ) And a second indicator key 64.

The pair of first indicator keys 63 and the pair of second indicator keys 64 are formed in different colors so that opening/closing can be easily checked.

9 is a cross-sectional view showing a valve opening and closing device according to a second exemplary embodiment of the present invention, and FIG. 10 is a plan sectional view showing an open state of the valve opening and closing device according to a second exemplary embodiment of the present invention. 11 is a plan sectional view showing a closed state of the valve opening and closing device according to the second embodiment of the present invention.

9 to 11 show a second embodiment of the present invention, the first embodiment described above is to rotate the shaft 41 by the crank 44, the second embodiment of the piston 21 A rack 35 is formed on the piston leg 23, and a pinion 36 meshed with the rack 35 is formed on the shaft 41.

Since the housing body 10, the driving member 20, the driving shaft member 40, and the indicator 60 according to the second embodiment of the present invention are the same as those of the first embodiment, a duplicate description thereof will be omitted. It should be.

Next, the operation of the valve opening and closing device according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 11.

1 to 11, in the valve opening and closing device according to the embodiment of the present invention, pneumatic pressure is applied to the space 11 in the housing body 10 through the socket 12 in order to open and close the disk of the valve. Is supplied.

As the pneumatic pressure is supplied through the socket 12, the piston 21 installed symmetrically around the shaft 41 moves, and as the piston 21 moves, the fixing pin installed on the piston leg 23 (26) is moved.

Since the roller (26a) coupled to the fixing pin (26) is installed inside the fitting groove (46) of the crank (44), the fixing pin (26) rotates the crank (44).

Accordingly, the shaft 41 coupled to the crank 44 is rotated to open or close the disc of the valve.

5 shows a state in which the crank 44 and the shaft 41 are rotated and opened by the movement of the piston 21, and FIG. 6 is the piston 21 due to the elasticity of the spring 31 together with the discharge of pneumatic pressure. ) Shows a closed state by rotating the shaft 41 and the crank 44 while moving.

In this way, the valve opening and closing device according to the first embodiment of the present invention is opened by rotating the shaft 41 by pneumatic pressure, and the valve is closed by rotating the shaft 41 reversely by the elasticity of the spring 31.

As the shaft 41 is rotated by the crank 44, the indicator 60 coupled to the upper portion of the shaft 41 rotates, and a first indicator key 63 and a second indicator installed on the indicator 60 It is possible to visually check whether the valve is opened or closed by the indicator key 64.

In addition, the stopper bolt 15 fastened to the housing body 10 rotates the stopper 48 together with the crank 44, and the locking portions 51 protruding to both sides of the stopper 48 are the stopper bolts 15 ).

As the stopper portion 15b of the stopper bolt 15 has a short or long length, it is possible to limit the rotation radius of the stopper 48.

That is, the stopper part 15b of the stopper bolt 15 that controls rotation in the close direction among the two stopper bolts 15 is formed short so that the closing angle of the stopper 48 can be further rotated by 5°. have.

In addition, the stopper portion 15b for controlling the rotation in the close direction may be formed to be long so that the closing angle of the stopper 48 is rotated less than 45° so that it is always in an OPEN state.

On the other hand, by forming a short stopper portion (15b) of the stopper bolt 15, which controls the rotation of the open (OPEN) direction among the two stopper bolts 15, it may be further rotated 5ㅀ in the open (OPEN) direction.

In addition, by forming a long stopper portion (15b) for controlling the rotation of the open (OPEN) direction, the opening angle of the stopper 48 is rotated less than 45ㅀ, it can be implemented so that the maximum open (OPEN) angle of 45ㅀ.

In addition, the stopper bolt 15 is implemented so that the maximum rotation angle is 100° by allowing both the stopper portions 15b in the close direction and the open direction to have a shorter length that is rotated 5° further, or By shortening only one stopper part (15b) it can be implemented to have a rotation angle of 95ㅀ.

In addition, the DU core 16 installed on the housing body 10 reduces the frictional resistance caused by the rotation of the DU bushing 16 by coating the surface of the bushing with Teflon so that the shaft 41 rotates smoothly. Even with frequent rotation of the shaft 41, it has durability that can be used for a long time.

In addition, the abrasion-preventing washer 17 is coupled to the shaft 41 protruding outward of the housing body 10 so that the shaft 41 rotates smoothly.

In addition, the airtight member 19 is in close contact with the housing body 10 by the pneumatic pressure supplied through the socket 12 so that the sealed state of the space 11 of the housing body 10 can be stably maintained.

The valve opening and closing device according to the second embodiment of the present invention is a shaft in which a pinion 36 is formed by a rack 35 formed in the piston 21 while the piston 21 is moved by pneumatic pressure supplied through the socket 12. (41) will be rotated.

8 is a plan sectional view showing a state in which the valve is open, and FIG. 9 is a plan sectional view showing a state in which the valve is closed.

8 and 9, the piston 21 rotates the shaft 41 while moving in the right direction in the drawings of FIGS. 8 and 9 to open the valve, and the piston 21 is shown in FIGS. 8 and 9. As it moves to the left in the drawing of 9, the valve is closed.

Although the invention made by the present inventor has been described in detail according to the above embodiment, the invention is not limited to the above embodiment and can be changed in various ways without departing from the gist of the invention.

10: housing body 11: space

12: socket 13: fastening hole

14: shaft coupling hole 15: stopper bolt

15a: threaded portion 15b: stopper portion

16: DU bushing 17: wear-resistant washer

17a: first washer part 17b: second washer part

17c: third washer part 17d: washer

19: hermetic member 19a: hermetic body

19b: uneven portion 19c: airtight plate

20: drive member 21: piston

22: piston body 23: piston leg

24: coupling hole 25: concave groove

26: fixing pin 27: snap ring

28: spring cap 29: through hole

30: fixing bolt 31: spring

32: cover 35: rack

36: pinion

40: drive shaft member 41: shaft

42: groove 43: lower roller

44: crank 45: coupling hole

46: fitting groove 47: upper roller

48: stopper 49: stopper body

50: coupling hole 51: locking portion

52: slope

60: indicator 61: indicator body

62: indicator key 63: first indicator key

64: second indicator key

Claims

A housing body 10 having a space 11 formed therein and to which a socket 12 is fastened so that pneumatic pressure is supplied to one surface thereof;

A driving member 20 having a pair of pistons 21 installed in the space 11 to enable reciprocating movement by pneumatic pressure supplied through the socket;

The shaft 41 is rotatably installed by the reciprocating movement of the pair of pistons 21, the crank 44 provided on the shaft 41, and the shaft 41 is rotated by a set angle. A valve opening and closing device comprising: a drive shaft member 40 provided with a stopper () for limiting the rotation of the shaft 41.
The method of claim 1,

The driving member 20 has a piston body 22 formed to reciprocate the space 11 by the pneumatic pressure introduced through the socket 12, and protrude to one side of the piston body 22. Includes; a piston 21 consisting of a pair of piston legs 23 to be formed,

The piston leg 23 has a coupling hole 24 formed so that the fixing pin 26 is coupled;

A fixing pin 26 to which a roller 26a is coupled to be coupled to the coupling hole 24;

And a retaining ring (27) coupled to the fixing pin (26) so that the fixing pin (26) coupled to the piston (21) is not separated from each other.
The method of claim 1,

The piston 21 has a concave groove 25 formed on the other side of the piston body 22 so that the head of the fixing bolt 30 is concave to prevent interference with the fixing bolt 30. Valve opening and closing device.
The stopper 48 includes a stopper body 49 formed in a predetermined shape;

A coupling hole 50 formed so that the stopper body 49 is coupled to the shaft;

A locking portion 51 protruding from both sides of the stopper body 49 so that the shaft 41 rotates at a limited angle when the shaft 41 is rotated;

Including; an inclined surface 52 formed on one surface of the locking portion 51 so that the shaft 41 can be rotated at an angle of a minimum of 45ㅀ to a maximum of 100ㅀ,

The valve opening and closing device, characterized in that the stopper body (49) is formed with an interference preventing groove (49a) so as not to interfere with the stopper bolt (15).
The method of claim 4,

The housing body 10 further includes a stopper bolt 15 fastened to the housing body 10 so that the stopper 48 rotates within a limited angle,

The stopper bolt 15 includes a threaded portion 15a formed to have a predetermined length to be fastened to the housing body 10;

It consists of a stopper portion (15b) extending by a predetermined length to the end of the screw portion (15a) to limit the rotation of the stopper (48),

The stopper portion (15b) is a valve opening and closing device, characterized in that the length is formed to extend short or long to limit the rotation angle of the stopper (48).
The method of claim 1,

The housing body 10 is provided with a DU bushing 16 that prevents abrasion of the housing body 10 while smoothly rotating the shaft 41,

The DU bushing (16) is formed of a hollow cylindrical body made of metal, a valve opening and closing device, characterized in that the Teflon coating is formed on the inner surface of the cylindrical body.
The method of claim 1,

The wear-resistant washer 17 includes a first washer portion 17a formed of a metal material having a predetermined thickness to prevent abrasion of the indicator 60 while allowing the indicator 60 to rotate smoothly;

A second washer part 17b formed of a plastic material having a predetermined thickness on the upper surface of the first washer part 17a;

Consisting of; a third washer part 17c formed of a metal material having a predetermined thickness on the upper surface of the second washer part 17b,

A washer (17d) installed on the upper surface of the DU bushing (16) so that the shaft (41) rotates smoothly.
The method of claim 6,

An airtight member 19 for maintaining airtightness of the housing body 10 is installed on the inner surface of the housing body 10,

The airtight member 19 includes an airtight body 19a formed of a disk having a predetermined diameter;

An uneven portion (19b) extending in a round shape on the outside of the airtight body (19a);

A valve opening/closing device comprising: an airtight plate (19c) integrally extending outside the uneven portion (19b).