KR102296760B1 - Seat for control valve and control valve including the same - Google Patents

Abstract

According to the present invention, a seat for a control valve comprises: a body part which is mounted in a mounting groove formed along a circumferential surface of a disk for opening and closing a flow path of the control valve, and can flow in a twisted form according to the rotational direction of the disk; and a scraping part which is connected to the body part and protrudes to the outside of the mounting groove to seal the flow path while scraping the seat on the flow path according to the rotation direction of the disk, or to be spaced apart from the seat. According to an embodiment of the present invention, a control valve comprises: a valve body part having a flow path formed therein; a disk disposed in the flow path and opening and closing the flow path by rotation; and a seat for the control valve installed on a circumferential surface of the disk.

Description

Seat for control valve and control valve including the same

The present invention relates to a seat for a control valve and a control valve, and more particularly, it is possible to have a small operating torque performance while improving the sealing property, the dust trapping phenomenon does not occur, and the interior of the valve body has excellent performance It relates to a seat for a control valve capable of increasing dust control efficiency by self-cleaning and sealing with a vacuum cleaner, and a control valve including the same.

In general, the control valve is installed on a pipe that transports various types of water such as drinking water, industrial water, agricultural water, etc., seawater, wastewater, etc., and rotates a disk-shaped disk provided in the valve body. It opens and closes to control the flow rate or hydraulic pressure of the fluid.

And, it is a valve that opens and closes as the disk rotates about the center line of the disk. Because the opening and closing action is simple, the operation is fast and it is widely applied to low or high pressure water, steam, air, gas, etc. As materials, cast steel, cast iron, stainless steel, PP, PV, etc. are used.

Such a control valve includes a valve body having a fluid passage through which fluid can flow to either side, a valve disk that opens or closes a fluid passage in the valve body, and a valve disk and a bolt or pin fastened with a bolt or pin to close the valve disk. It consists of a rotating stem that rotates in the fluid passage of the body, and a valve seat that is installed on the inner diameter of the fluid passage and maintains airtightness between the valve body and the valve disk when the valve disk closes the fluid passage. A handle or actuator is installed that can automatically rotate the stem to open or close the valve disc.

Here, the fluid passage is closed by the contact between the valve seat and the valve disk, and at this time, the torque is generated the most.

To facilitate rotation of the rotating stem assembly, a copper stem bushing or dry series or coated metal stem bushing is applied inside the valve body, and to prevent fluid from flowing out toward the rotating stem, the valve The packing is installed on the upper part of the main body.

This control valve operates while rotating the rotating stem by 90 degrees during the opening and closing process of the valve disk.

In addition, the control valve is a central valve, and since the position of the valve seat and the rotating stem hub is the same, there is a problem in that torque is generated by contact.

In addition, a butterfly valve to which a rubber seat is applied is widely used for the purpose of controlling the dust having a powdery property including particles in the fluid.

This is because, when the valve disk rotates, it has a self-cleaning structure in which it sits while sweeping away the dust on the rubber sheet located in the valve body part by itself.

However, in the structure of the hub, there is a problem in that dust is caught between the valve disk and the valve body.

And, the conventional butterfly valve has a rubber seat inside the valve body, and when the metal disk rotates inside, the upper and lower ends of the disc and the upper and lower ends (hub part) inside the valve body are always in contact. The operating torque is large, and there is a problem that a pinching phenomenon occurs in this part as well.

In addition, there is a problem in that it is difficult to ensure perfect sealing when seated only with the valve disk constituting the butterfly valve, and it is difficult to operate while cleaning the dust accumulated on the seat.

Therefore, it is possible to reduce the capacity of the actuator by minimizing all torque generated during opening and closing of the valve disc, and in the process, it is possible to improve the sealing performance while self-cleaning the dust without much friction. There is an urgent need to develop a control valve suitable for controlling dust having a sealing part to prevent powder from entering.

Registered Patent Publication No. 10-1070462 Registered Patent Publication No. 10-2015101

The present invention has been devised to solve the problems of the prior art, and includes a seat for a control valve capable of providing small operating torque performance by minimizing the contact area between a seat and a disk of a valve body in which torque occurs the most, and including the same An object of the present invention is to provide a control valve that does

Another object of the present invention is to provide a seat for a control valve capable of efficiently removing dust by self-cleaning and sealing the inside of the valve body with excellent performance without causing dust to be caught, and a control valve including the same but it has a purpose.

Another object of the present invention is that the seat for the control valve flows in a twisted form in the process of sealing the seat of the valve body, thereby reducing the friction of the contact surface of the seat of the valve body and reducing the resistance of the seat of the valve body. An object of the present invention is to provide a seat for a control valve capable of reducing abrasion by the seat of the body and a control valve including the same.

Another object of the present invention is to provide a seat for a control valve capable of preventing fluid leakage when the disk closes the flow path of the valve body by stably maintaining the airtightness of the disk by the seat for the control valve, and a control valve including the same Its purpose is to provide

Another object of the present invention is to allow the seat for the control valve to be compressed to a certain level in the process of sealing the seat of the valve body, thereby reducing the resistance to the seat of the valve body, whereby the seat for the control valve is An object of the present invention is to provide a seat for a control valve capable of smoothly scraping and self-cleaning the seat without being pushed by the seat of the disk and separated from the disk, and a control valve including the same.

A seat for a control valve according to an embodiment of the present invention is a seat mounted in a mounting groove formed along a circumference of a disk for opening and closing a flow path of a control valve, and is located in the mounting groove, the width of which is the width of the mounting groove a body portion that is formed to have a smaller width and can flow in a twisted form according to the rotational direction of the disk; and a scraping part connected to the body part and protruding to the outside of the mounting groove to seal the flow path while scraping the sheet on the flow path according to the rotation direction of the disk, or to be spaced apart from the seat. At least one sealing lip is formed along the edge of at least one of the one side and the other side to be in contact with or spaced apart from the inner wall of the mounting groove according to the rotational direction of the disk, and the sealing lip is formed in the body part. First and second sealing lip disposed on one side and the other side, respectively, contacting or spaced apart from the inner wall of the mounting groove at the entrance side of the mounting groove, and disposed on one side and the other side of the body, respectively, the first and ,2 third and fourth sealing lip contacting or spaced apart from the inner wall of the mounting groove from the inside of the mounting groove rather than the sealing lip.

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In addition, the body portion is spaced apart from a connection surface connecting both sides of the wall of the mounting groove by a predetermined distance.

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In addition, the seat for a control valve according to another embodiment of the present invention is a seat mounted in a mounting groove formed along the circumference of a disk that opens and closes a flow path of the control valve, and is located in the mounting groove, the width of which is the mounting a body portion formed to have a width smaller than the width of the groove and capable of flowing in a twisted form according to the rotational direction of the disk; and a scraping part connected to the body part and protruding to the outside of the mounting groove to seal the flow path while scraping the sheet on the flow path according to the rotation direction of the disk, or to be spaced apart from the sheet. It includes a curved sealing surface portion for maintaining a state in contact with the connection surface connecting both sides of the wall of the mounting groove, along the edges of one side and the other side of the body portion a state in contact with the inner wall of the mounting groove The first and second sealing lip holding the , respectively, are formed.

In addition, at least one compression guide groove is formed on at least one surface of one side and the other side of the body part so that the body part can be compressed when the scraping part scrapes the sheet.

A control valve according to an embodiment of the present invention includes a valve body having a flow path formed therein; a disk disposed in the flow path and opening and closing the flow path by rotation; and a seat for a control valve installed on the circumferential surface of the disk.

According to the seat for a control valve according to the present invention and a control valve including the same, there is an effect that a small operating torque performance can be obtained by minimizing the contact area between the seat and the disk of the valve body in which the torque is the largest.

In addition, there is an effect that dust is not caught, and dust can be efficiently removed by self-cleaning and sealing the inside of the valve body with excellent performance.

In addition, the seat for the control valve flows in a twisted form in the process of sealing the seat of the valve body, thereby reducing the degree of friction of the contact surface with the seat of the valve body and reducing the resistance of the seat of the valve body. It has the effect of reducing wear.

In addition, since the seat for the control valve stably maintains the airtightness of the disk, there is an effect of preventing the fluid from leaking when the disk closes the flow path of the valve body.

In addition, by allowing the seat for the control valve to be compressed to a certain level in the process of sealing the seat of the valve body, the resistance to the seat of the valve body can be relieved, which causes the seat for the control valve to be pushed against the seat of the valve body and the disc It has the effect of smoothly scraping and self-cleaning the sheet without the phenomenon of being separated from the sheet.

1 is a front view showing a control valve according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view showing a control valve according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view showing the state of the seat for the control valve in the process of closing the flow path of the disk applied to the control valve according to an embodiment of the present invention.
4 is a view showing an embodiment of a seat for a control valve applied to the control valve according to the present invention.
5 is a view showing another embodiment of the seat for the control valve applied to the control valve according to the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Throughout the specification, like reference numerals are assigned to similar parts.

1 is a front view showing a control valve according to an embodiment of the present invention, Figure 2 is a side cross-sectional view showing a control valve according to an embodiment of the present invention, Figure 3 is a control valve according to an embodiment of the present invention It is a side cross-sectional view showing the state of the seat for the control valve in the process that the disk applied to the control valve closes the flow path.

The control valve 1 according to an embodiment of the present invention includes at least any one or more of the valve body portion 10, the disk 20, the control valve seats 30a, 30b, 30c, and the rotating stem 40. may include

In addition, the seat 30a for a control valve according to another embodiment of the present invention may include a body portion 31a and a scraping portion 32a.

First, the valve body 10 is fixed between the conduits of the fluid line.

The valve body 10 has a flow path 10a for passing various types of fluids such as various powders, sludge, nitric acid, strong acid, and the like therein.

The seat 11 to which the scraping part 32a comes into contact when the disk 20 opens and closes the flow path 10a is integrally formed on the inner periphery of the valve body part 10 . In this case, the sheet 11 may be positioned on the flow path 10a.

The sheet 11 located on the upper right side with reference to FIG. 3 may be formed to have an inclination angle that gradually decreases from the front end where the scraping part 32a, which will be described later, first contacts the rear end, and the sheet 11 located on the lower left side. ) may be formed to have an inclination angle that gradually increases from the front end to which the scraping portion 32a first contacts to the rear end.

In this way, when the inclination angle is formed on the seat 11 , when the disk 20 closes the flow path 10a , the scraping part 32a can move naturally along the seat 11 .

The disk 20 is disposed on the flow path 10a to allow the fluid to flow by opening the flow path 10a through a rotational operation, or to block the flow of the fluid by closing the flow path 10a.

At this time, the rotation angle of the disk 20 may be 0 ~ 90 °, it may be configured to completely block the flow of the fluid when fully closed.

Furthermore, the disk 20 may be inclined at an angle of 10° to 20° with respect to the rotating stem 40 , and may be installed in a symmetrical structure with respect to the rotating stem 40 . In this case, it is possible to increase the exponential effect on the bidirectional hydraulic pressure.

The rotating stem 40 may be formed in a bar shape, and is inserted into and coupled to a through hole formed in the longitudinal direction of the valve body 10 .

At this time, a separation space is formed between the through hole and the rotating stem 40, and the packing (P) is installed in the separation space.

The packing (P) is mounted on the upper outer periphery of the rotating stem 40 at the top side of the through hole into which the rotating stem 40 is first inserted.

The packing (P) reduces friction generated while the rotating stem 40 rotates while maintaining the airtightness of the valve body 10 and the rotating stem 40, thereby eliminating the leakage of fluid and improving the lifespan. .

Although not shown in the drawings, the rotating stem 40 is attached to the disk 20 with a key, bolt, tapered pin, etc., and the disk 20 is driven by the power of a driving unit such as a motor (not shown) to the valve body portion 10 Rotate in the flow path (10a) of.

Meanwhile, along the circumferential surface of the disk 20 described above, a mounting groove 20a in which the seat 30a for the control valve is accommodated is formed.

The seat 30a for the control valve is disposed on the circumferential surface of the disk 20, and when the disk 20 closes the flow path 10a, it comes into contact with the seat 11 to form the valve body 10 and the disk 20. ) performs a function of cleaning the sheet 11 by scraping particles such as powder and powder attached to the sheet 11 while maintaining the airtightness between the two.

The seat 30a for the control valve may maintain an inclined state at an angle of 10° to 20° with respect to the rotating stem 40 by the disk 20 . In this case, when the disk 20 closes the flow path 10a, it is in close contact with the seat 11 formed on the inner surface of the valve body 10 to completely close the flow path 10a.

Next, the body part 31a and the scraping part 32a which comprise the seat 30a for control valves are demonstrated concretely.

The body portion 31a is formed in a substantially ring shape to surround the circumference of the disk 20 in the mounting groove 20a.

The scraping part 32a is integrally formed with the body part 31a.

The scraping part 32a protrudes to the outside of the mounting groove 20a, and either comes into contact with the seat 11 according to the rotation direction of the disk 20 and is responsible for sealing, or is spaced apart from the seat 11 to the flow path 10a. open the

The scraping unit 32a performs a function of cleaning the sheet 11 by scraping particles such as powder or powder attached to the sheet 11 in the process of sealing the sheet 11 .

The scraping part 32a may be formed in a curved shape so as to be in contact while scraping the sheet 11 smoothly.

The body portion 31a and the scraping portion 32a may be formed of a metal material that does not change in physical properties even at high temperatures.

In addition, the body portion (31a) is formed to have a width smaller than the width of the mounting groove (20a). And, the body portion (31a) is spaced apart from the connection surface (20b) for connecting both sides of the wall of the mounting groove (20a) and a predetermined distance.

Accordingly, the body portion 31a can be smoothly twisted and bent by the action of the scraping portion 32a that scrapes the sheet 11 according to the rotation of the disk 20 .

On the other hand, at least one or more sealing lip contacting or spaced apart from the inner wall of the mounting groove 20a according to the rotation direction of the disk 20 is formed on at least one surface of one side and the other side of the body portion 31a. can

That is, the sealing lip may be formed only on one side or the other side of the body portion 31a, or may be formed on both sides of the body portion 31a, respectively. In addition, at least one sealing lip may be formed on one side or the other side of the body portion 31a.

The sealing lip is formed along the edge of the body portion (31a). Accordingly, the sealing lip is formed into a ring shape when viewed from the front.

The drawing shows an example in which the first sealing lip 311a to the fourth sealing lip 314a are dividedly formed.

2 and 3, the first sealing lip 311a and the second sealing lip 312a are respectively disposed on one side and the other side of the body part 31a, and the inlet of the mounting groove 20a In contact with or spaced apart from the inner wall of the mounting groove (20a) from the side.

The third sealing lip 313a and the fourth sealing lip 314a are respectively disposed on one side and the other side of the body portion 31a.

The third sealing lip 313a is spaced apart from the first sealing lip 311a on the same surface of the body 31a by a predetermined distance, and the fourth sealing lip 313a is separated from the second sealing lip 312a on the same surface of the body 31a. spaced apart by a predetermined distance.

Accordingly, the third and fourth sealing lip 313a and 314a are in contact with or spaced apart from the inner wall of the mounting groove 20a from the inside of the mounting groove 20a than the first and second sealing lip 311a and 312a.

Next, the operation of the seat 30a for a control valve and a control valve including the same according to an embodiment of the present invention and unique effects appearing in the process will be described.

First, when the flow path 10a of the valve body 10 is to be closed, the rotating stem 40 is rotated through the driving unit.

Due to the rotation of the rotating stem 40, the disk 20 is rotated together so that the scraping part 32a is in close contact with the seat 11 to prevent leakage due to airtight maintenance.

And, when the pressure is applied in the moving direction by setting the inclination in the moving direction of the disc 20 to 10° to 20°, the acute angle of the seat 11 receives opposing pressure to prevent the disc 20 from being pushed, and the seat By increasing the adhesion to (11), the disk 20 or the sheet 11 is contacted without being pushed, thereby forming an improved airtightness and preventing fluid from leaking.

At this time, the seat 30a for the control valve is buried in the seat 11 because the scraping part 32a maintains a contact state while scraping the seat 11 when the disk 20 closes the flow path 10a. It is sealed while thoroughly removing the dust in it.

In particular, as shown in FIG. 2 , the first sealing lip 311a to the fourth sealing lip 314a are all spaced apart from the inner wall surface of the mounting groove 20a in a state in which the disk 20 opens the flow path 10a. However, when the disk 20 closes the flow path 10a as shown in FIG. 3 , the scraping part 32a is pushed in the opposite direction of the closing of the flow path 10a by the seat 11 to scrape the sheet 11 . do. As a result, the seat 30a for the control valve may be entirely twisted in the process of scraping the seat 11 . In this case, it is possible to relieve the resistance of the seat 11 acting on the seat 30a for the control valve while reducing the degree of friction of the contact surface with the seat 11, thereby reducing the wear of the scraping portion 32a. .

Furthermore, when the scraping part 32a is pushed in the opposite direction of the closing of the flow path 10a by the seat 11, the first sealing lip 311a and the second sealing lip 311a positioned on the upper side of the disk 20 with reference to FIG. 4 The sealing lip 314a is in contact with the inner wall surface of the mounting groove 20a, respectively, and the second sealing lip 312a and the third sealing lip 313a located below the disk 20 are also the mounting groove 20a. each of which is in contact with the inner wall surface of

That is, the first sealing lip 311a to the fourth sealing lip 314a form a closed area on the mounting groove 20a, and the fluid flowing in through the inlet of the mounting groove 20a is transferred to the mounting groove 20a. can be prevented from flowing into the In addition, even if the fluid passes between the inner wall surface of the first sealing lip 311a located on the upper side of the disk 20 and the mounting groove 20a, by the fourth sealing lip 314a in close contact with the mounting groove 20a. Even if it passes between the inner wall surface of the second sealing lip 312a located on the lower side of the disk 20 and the mounting groove 20a, it is blocked by the third sealing lip 313a in close contact with the mounting groove 20a. Therefore, it is possible to more reliably prevent the fluid from leaking.

Additionally, even when the disk 20 is rotated in the direction in which the flow path 10a is opened, the seat 30a for the control valve is twisted by the frictional force with the seat 11 , so the friction of the contact surface against the seat 11 . It is possible to relieve the resistance of the sheet 11 applied to the scraping portion 32a while reducing the degree.

As a result, the durability of the control valve 1 can be improved through the characteristics of the seat 30a for the control valve as described above, and a phenomenon in which the lifespan is unnecessarily shortened can be prevented from occurring.

Meanwhile, a seat 30b for a control valve according to another embodiment of the present invention will be described with reference to FIG. 4 .

4 is a view showing an embodiment of a seat for a control valve applied to the control valve according to the present invention.

The seat 30b for the control valve shown in FIG. 4 includes a body part 31b and a scraping part 32b.

Since the scraping part 32b is the same as the aforementioned scraping part 32a, only the body part 31b will be described below.

The body portion 31b is located in the mounting groove 20a. The body portion 31b is formed to have a smaller width than the mounting groove 20a as in the above-described body portion 31a, and scrapes the sheet 11 according to the rotation of the disk 20. It can be bent as it is twisted by action.

In addition, a sealing surface portion 315b is formed at an end of the body portion 31b to maintain a state in contact with the connection surface 20b connecting both side walls of the mounting groove 20a.

At this time, the sealing surface portion 315b may be formed in a curved shape so that the control valve seat 30b can be smoothly twisted and bent.

In this case, the sealing surface portion 315b may be formed to have a width length of 10 to 90% of the width length of the body portion 31b.

The sealing lip formed in the body portion 31b may be divided into first sealing lip 311b to fourth sealing lip 314b.

The first sealing lip 311b and the second sealing lip 312b are respectively disposed on one side and the other side of the body portion 31b, and on the inner wall of the mounting groove 20a from the inlet side of the mounting groove 20a. contacted or separated.

The third sealing lip 313b and the fourth sealing lip 314b are respectively disposed on one side and the other side of the body portion 31b.

The third sealing lip 313b is spaced apart from the first sealing lip 311b on the same surface of the body part 31b by a predetermined distance, and the fourth sealing lip 313b is separated from the second sealing lip 312b on the same surface of the body part 31b. spaced apart by a predetermined distance.

Accordingly, the third and fourth sealing lip 313b and 314b are disposed inside the mounting groove 20a than the first and second sealing lip 311b and 312b.

And, the third and fourth sealing lip (313b, 314b) is formed to be larger than the first and second sealing lip (311b, 312b) to maintain a state in contact with the inner wall of the mounting groove (20a).

That is, in a state in which the disk 20 opens the flow path 10a, the first sealing lip 311b and the second sealing lip 312b maintain a state spaced apart from the inner wall surface of the mounting groove 20a, and the third The sealing lip 313b and the fourth sealing lip 314b maintain a state in contact with the inner wall surface of the mounting groove 20a, but when the disk 20 closes the flow path 10a, the scraping part 32b moves to the seat. (11) is pushed in the opposite direction to the closing of the flow path (10a), the first sealing lip (311b) located on the upper side of the disk (20) is in contact with the inner wall surface of the mounting groove (20a), the disk (20) ) of the second sealing lip (312b) located on the lower side is also in contact with the inner wall surface of the mounting groove (20a).

That is, due to the first sealing lip 311b, the third sealing lip 313b, the sealing surface portion 315b and the fourth sealing lip 314b located on the upper side of the disk 20, the mounting groove 20a A plurality of closed regions are formed in the disk 20, and a plurality of sealing lip 312b to third sealing lip 313b and sealing surface portion 315b located on the lower side of the disk 20 are formed on the mounting groove 20a. Since the closed area is formed, it is possible to prevent the fluid flowing in through the inlet of the mounting groove 20a from flowing into the mounting groove 20a. In addition, even if the fluid passes between the first sealing lip 311b positioned above the disk 20 and the inner wall surface of the mounting groove 20a, the third sealing lip 313b is in close contact with the inner wall surface of the mounting groove 20a. ) and the sealing surface portion 315b and the fourth sealing lip 314b, and the fluid passes between the second sealing lip 312b located on the lower side of the disk 20 and the inner wall surface of the mounting groove 20a Even so, since the third sealing lip 313b and the fourth sealing lip 314b and the sealing surface portion 315b that are in close contact with the inner wall surface of the mounting groove 20a are blocked, leakage of the fluid can be more reliably prevented.

Meanwhile, a seat 30c for a control valve according to an embodiment of the present invention will be described with reference to FIG. 5 .

5 is a view showing another embodiment of the seat for the control valve applied to the control valve according to the present invention.

The seat 30c for a control valve shown in FIG. 5 includes a body part 31c and a scraping part 32c.

Since the scraping part 32c is the same as the aforementioned scraping part 32a, only the body part 31c will be described below.

The body portion 31c is located in the mounting groove 20a. The body portion 31c is formed to have a smaller width than the mounting groove 20a as in the body portion 31a described above, and scrapes the sheet 11 according to the rotation of the disk 20. It can be bent as it is twisted by action.

In addition, a sealing surface portion 313c is formed at the end of the body portion 31c to maintain a state in contact with the connection surface 20b connecting both side walls of the mounting groove 20a.

At this time, the sealing surface portion 313c may be formed in a curved shape so that the control valve seat 30c can be smoothly twisted and bent.

In this case, the sealing surface portion 315c may be formed to have a width length of 10 to 90% of the width length of the body portion 31c.

The sealing lip formed in the body part 31c may be divided into a first sealing lip 311c and a second sealing lip 312c.

The first sealing lip 311c and the second sealing lip 312c are respectively disposed on one side and the other side of the body portion 31c, and maintain a state in contact with the inner wall of the mounting groove 20a.

In addition, a compression guide groove 314c may be formed on at least one surface of one side and the other side of the body portion 31c.

That is, the compression guide groove 314c may be formed only on one side or the other side of the body portion 31c, or may be formed on both sides of the body portion 31c, respectively. And, the compression guide groove (314c) may be formed in at least one or more on one side or the other side of the body portion (31c).

The figure shows an example in which the compression guide grooves 314c are formed on one side and the other side of the body 31c, respectively, and are arranged at different heights.

The compression guide groove 314c is formed in a ring shape when viewed from the front.

And, the compression guide groove (314c) may be formed by cutting a certain area of the body portion (31c). Due to this, when the scraping part 32c scrapes the seat 11 and the disk 20 closes the flow path 10a to keep the scraping part 32c in contact with the seat 11, the body part 31c ) due to the pressing force acting on the body portion 31c may be compressed to a certain level.

Accordingly, the scraping portion 32c is further introduced into the mounting groove 20a by a predetermined depth while compressing the body portion 31c, thereby reducing the resistance of the sheet 11 to the scraping portion 32c.

As a result, the control valve seat 30c is pushed in the opposite direction to the scraping direction of the seat 11 to smoothly scrape and self-clean the seat 11 without being separated from the disk 20, and the body portion 31c ), it is possible to increase the adhesion of the scraping portion 32c to the sheet 11 due to the elastic force.

Furthermore, due to the action of the body portion 31c by the compression guide groove 314c, it is possible to manufacture the seat 30c for the control valve of a metal material that has excellent durability and does not change in physical properties even at high temperatures.

Meanwhile, in a state in which the disk 20 opens the flow path 10a, the body portion 31c maintains a spaced state from the inner wall surface of the mounting groove 20a, and the first sealing lip 311c and the second sealing lip The 312c maintains a state in contact with the inner wall surface of the mounting groove 20a, but when the disk 20 closes the flow path 10a, the scraping portion 32c is moved by the seat 11 of the flow path 10a. By being pushed in the opposite direction to closing, the left side of the body portion 31c located on the upper side of the disk 20 is in contact with the inner wall surface of the mounting groove 20a, and the body portion located on the lower side of the disk 20 ( 31c) is in contact with the inner wall surface of the mounting groove (20a).

That is, due to the left side of the body portion 31c located on the upper side of the disk 20, the first sealing lip 311c, the sealing surface portion 313c and the second sealing lip 312c, the mounting groove 20a is formed. A plurality of closed areas are formed on the disk 20, the right side of the body portion 31c positioned below the disk 20, the first sealing lip 311c, the sealing surface portion 313c, and the second sealing lip 312c. Due to this, a plurality of closed areas are formed on the mounting groove 20a, and thus, it is possible to prevent the fluid flowing in through the inlet of the mounting groove 20a from flowing into the mounting groove 20a.

In addition, even if the fluid passes between the left surface of the body portion 31c located on the upper side of the disk 20 and the inner wall surface of the mounting groove 20a, the first sealing lip ( 311c), the sealing surface portion 313c and the second sealing lip 312c are blocked, and the fluid flows between the right side of the body portion 31c located below the disk 20 and the inner wall surface of the mounting groove 20a. Even if it passes, it is blocked by the first sealing lip 311c and the sealing surface part and the second sealing lip 312c in close contact with the inner wall surface of the mounting groove 20a, so that the fluid can be more reliably prevented from leaking.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims described later rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted

1: control valve 10: valve body part
10a: Euro 11: Seat
20: disk 20a: mounting groove
20b: connection surface 30a, 30b, 30c: seat for control valve
31a, 31b, 31c: body portion 311a, 311b, 311c: first sealing lip
312a, 312b, 312c: second sealing lip 313a, 313b: third sealing lip
314a, 314b: fourth sealing lip 315b, 313c: sealing surface portion
32a, 32b, 32c: scraping part 314c: compression guide groove
40: rotating stem

Claims (8)

A seat mounted in a mounting groove formed along the circumference of a disk that opens and closes the flow path of the control valve,
a body portion positioned in the mounting groove, the body portion being formed to have a width smaller than the width of the mounting groove and being able to flow in a twisted shape according to the rotational direction of the disk; and
and a scraping part connected to the body and protruding to the outside of the mounting groove to close the flow path while scraping the sheet on the flow path according to the rotation direction of the disk, or to be spaced apart from the sheet; and
At least one sealing lip contacting or spaced apart from the inner wall of the mounting groove is formed along the edge of at least one surface of the one side and the other side of the body part according to the rotational direction of the disk,
The sealing lip is disposed on one side and the other side of the body portion, respectively, and first and second sealing lip contacting or spaced apart from the inner wall of the mounting groove from the entrance side of the mounting groove, and one side and the other side of the body portion A seat for a control valve comprising third and fourth sealing lip disposed respectively, the third and fourth sealing lip contacting or spaced apart from the inner wall of the mounting groove from the inside of the mounting groove rather than the first and second sealing lip.
delete delete According to claim 1,
The body portion is a seat for a control valve spaced apart from a connection surface connecting both sides of the wall of the mounting groove and a predetermined distance.
delete A seat mounted in a mounting groove formed along the circumference of a disk that opens and closes the flow path of the control valve,
a body portion positioned in the mounting groove, the body portion being formed to have a width smaller than the width of the mounting groove and being able to flow in a twisted shape according to the rotational direction of the disk; and
and a scraping part connected to the body and protruding to the outside of the mounting groove to close the flow path while scraping the sheet on the flow path according to the rotation direction of the disk, or to be spaced apart from the sheet; and
The body portion includes a curved sealing surface portion that maintains a state in contact with the connection surface connecting both sides of the wall of the mounting groove,
A seat for a control valve in which first and second sealing lips are respectively formed along the edges of one side and the other side of the body portion to keep in contact with the inner wall of the mounting groove.
7. The method of claim 6,
A seat for a control valve having at least one compression guide groove formed on at least one surface of one side and the other side of the body part so that the body part can be compressed when the scraping part scrapes the seat.
a valve body having a flow path formed therein;
a disk disposed in the flow path and opening and closing the flow path by rotation; and
Including the seat for the control valve according to any one of claims 1 and 4 installed on the circumferential surface of the disk, or the seat for the control valve according to any one of claims 6 and 7; control valve.

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