KR101935682B1 - Butterfly valve - Google Patents

Abstract

The present invention relates to a butterfly valve, wherein a valve stem is pushed in a direction of an inflow path direction when the pressure of an outflow path is higher than that of the inflow path so as to prevent backflow generated when a valve seat installed in a valve body and a seat ring installed in a valve disk are widened. According to the present invention, the butterfly valve comprises: the valve body having the inflow and outflow paths to communicate with each other through an inner flow path of a center, having upper and lower through-holes penetrating upper and lower parts, respectively, and having an annular valve seat disposed on the inner flow path; the valve stem penetrating the valve body to be installed to be able to rotate; the valve disk coupled to the lower part of the valve step to open/close the inner flow path of the valve body, and having the seat ring fixed and installed along the circumference of a surface facing the inflow path to be closely attached to the valve seat of the valve body when the inner flow path is closed; an operation part installed on the upper part of the valve stem to rotate the valve stem; an upper bush installed on the lower part of the upper through-hole of the valve body to rotate and support the outer circumferential surface of the valve stem; a lower bush installed on the upper part of the lower through-hole of the valve body to rotate and support the outer circumferential surface of the valve stem; and a first stem slip preventing part installed on the upper part of the upper through-hole of the valve body to press the valve step in the direction of the outflow path.

Description

Butterfly Valve {BUTTERFLY VALVE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a butterfly valve for controlling a flow rate and an oil pressure by opening and closing a pipe by rotating a disk in a disk shape.

In general, a valve is a device for controlling the flow rate, flow rate, pressure, etc. of a fluid flowing through a tube. The Butterfly Valve is light weight and small in size, so it can be installed in a narrow space, and it is used in various industrial fields. Especially, it can be used for industrial water, oil or sea water And the like. Such a butterfly valve has advantages of simple structure and good space utilization.

In addition, it has been developed as a primary eccentric, a secondary eccentric and a tertiary eccentric structure to reduce the operating torque and to be used at extremely low temperatures, high pressures and high temperatures. Also, a sheet ring made of a combination of graphite and metal, So as not to be limited by the kind of fluid flowing in the tube of the valve.

On the other hand, among various kinds of valves, valves such as butterfly valves and ball valves are provided with seats on the inner circumferential surface of the pipeline to prevent water leakage. Various techniques have been developed and applied to prevent this leakage. However, it does not directly block leakage caused by mechanical tolerances caused by machining and assembly.

In the butterfly valve of the prior art, a valve stem is inserted into an upper through hole and a lower through hole of a valve body, and a valve disk is coupled to the valve stem to open and close the channel. At this time, due to the clearance caused by the assembly of the valve stem in the upper and lower through-holes of the valve body, the valve stem is slightly displaced in the direction of the inflow channel and the outflow channel in accordance with the pressure of the fluid flowing in the channel, .

Particularly, when the butterfly valve is used, when the pressure acting on the inflow passage is higher than the pressure acting on the outflow passage, the valve stem is pushed toward the outflow passage, and the seat ring fixed on the valve disc is inserted into the valve body So that leakage does not occur.

However, in the opposite case, when the pressure acting on the inflow passage is lower than the pressure acting on the outflow passage, the valve stem is pushed toward the inflow passage, and the seat ring fixed on the valve disc is inserted into the valve seat Fall off.

At this time, there is a problem that backflow phenomenon occurs in which the fluid flowing from the outflow channel to the inflow channel leaks.

In order to solve the above problems, it is an object of the present invention to provide a valve stem having a clearance formed by a mechanical tolerance between a valve body and a valve stem when a pressure of an outflow channel is higher than a pressure of an inflow channel, A butterfly valve capable of preventing a reverse flow phenomenon caused by spreading of a valve seat provided in a valve body and a seat ring provided in a valve disk.

In order to achieve the above object, the butterfly valve according to the present invention is characterized in that the inflow channel and the outflow channel are formed so as to communicate with each other through a central inner flow channel, and upper and lower through holes are formed through the upper and lower portions, respectively A valve stem having an annular valve seat installed in the inner passage; a valve stem rotatably installed to pass through the valve body; a valve stem coupled to a lower portion of the valve stem to open and close the inner passage of the valve body, A valve disc fixedly installed on a circumference of a surface facing the inflow channel so as to be in close contact with the valve seat of the valve body when the inner flow path is closed; An upper bush installed below the upper through-hole of the valve body to rotatably support the outer circumferential surface of the valve stem, A lower bush installed above the lower through hole of the body for rotatably supporting the outer circumferential surface of the valve stem, a first stem pushing prevention member provided above the upper through hole of the valve body and urging the valve stem toward the outflow channel, ≪ / RTI >

The valve body may include a first supporter groove formed on an upper surface thereof so as to communicate with an upper portion of the upper through hole in the direction of the inflow passage, and the first stem anti-skid portion may be inserted into the first supporter groove, A first stem supporter member having a rounded shape so as to come into close contact with the outer circumferential surface of the valve stem and having a first inclined surface formed on the other side thereof, And a first supporter supporting member formed with a first wedge surface that is symmetrical with the first inclined surface of the one stem supporter member and a first fixing bracket protruding from the other side surface to be coupled to the first supporter groove .

Further, the first supporter groove of the valve body is formed in a shape of '┓' shape on the side surface so that the longitudinal side thereof communicates with the upper through hole, and the first stem supporter member has one side surface And the first supporter support member is inserted into a longitudinal side of the first supporter groove so as to contact the outer circumferential surface of the first supporter groove, The wedge surface is slidingly contacted to urge the first stem supporter member toward the outflow channel, and the first fixing bracket is bolted to the side of the first supporter groove.

The valve stem may further include a second stem anti-skid portion disposed under the lower through-hole of the valve body and urging the valve stem toward the outflow channel.

The valve body may have a second supporter groove formed on an upper surface thereof so as to communicate with a lower portion of the lower through-hole in the direction of the inflow passage. The second stem anti- A second stem supporter member having a rounded shape so as to come into close contact with the outer circumferential surface of the valve stem and having a second inclined surface formed on the other side thereof, And a second supporter supporting member formed with a second wedge surface that is symmetrical with the second inclined surface of the second stem supporter member and a second fixing bracket protruding from the other side surface and coupled to the second supporter groove .

In addition, the second supporter groove of the valve body may be formed in a shape of '┛' formed on the right side of the side section on the side surface so that the longitudinal side thereof communicates with the lower through hole, and the second stem supporter member Is inserted into the longitudinal side of the second supporter groove so as to be in contact with the outer circumferential surface of the valve stem, and the second supporter supporting member is inserted into the second inclined surface of the second stem supporter member inserted into the longitudinal side of the second supporter groove The second wedge surface slidably contacts the second stem supporter member in the direction of the outflow channel, and the second fixing bracket is bolted to the side of the second supporter groove.

The butterfly valve according to the present invention is characterized in that the first supporter groove is formed in the upper through-hole formed in the valve body in the shape of a cross section on the side surface in the inflow channel direction, and the first stem anti- The valve stem can be pushed in the direction of the outflow channel so that the clearance due to the tolerance formed in the outflow channel direction between the upper through hole of the valve body and the valve stem can be eliminated. Therefore, when the pressure of the outflow passage is higher than the pressure of the inflow passage, the valve stem is pushed toward the inflow passage, and the reverse flow phenomenon due to the leakage of the fluid caused by the conventional clearance between the valve seat of the valve body and the seat ring of the valve disc Can be prevented.

In addition, a second supporter groove is formed in the lower through-hole formed in the valve body, and a second stem anti-slide member is inserted into the second supporter groove to press the upper and lower portions of the valve stem in the direction of the outflow channel, It is possible to more effectively block the reverse flow phenomenon occurring when the pressure of the flow path is higher than that of the flow path.

In addition, when the bolt is tightened by bolting the first supporter supporting member to the first supporter groove, the first stem supporting member is wedge-connected to the first stem supporter member and the first supporter supporting member, Thereby further urging the stem supporter member toward the outflow channel. When the bolt is loosened, the first supporter supporting member is selectively adjusted to weaken the force pressing the first stem supporter member, thereby reducing the phenomenon that the upper through-hole of the valve body collides with the valve stem to be damaged or abraded by friction, The maintenance cost of the system can be reduced.

When the bolt is tightened by bolting the second supporter supporting member to the second supporter supporting member, the second supporter supporting member is wedge-joined to the second supporter supporting member, Thereby pressing the two-stem supporter member toward the outflow channel. When the bolt is loosened, the second supporter supporting member selectively adjusts the force for pressing the second stem supporter member to be weak so that the first and second stem anti-skid portions and the second stem anti- The valve stem can be stably pressed toward the outflow channel.

1 is a perspective view showing an embodiment of a butterfly valve according to the present invention,
Fig. 2 is a front view of Fig. 1 viewed from the front,
3 is a cross-sectional view taken along the line A-A 'in the embodiment of FIG. 2,
FIG. 4 is a side sectional view of the valve body of the embodiment of FIG. 3,
FIG. 5 is an exploded perspective view of the embodiment of FIG. 4,
Figs. 6 to 8 are side cross-sectional views showing the valve disk driving state, fluid flow and pressure in the embodiment of the butterfly valve according to the present invention,
9 is a plan view showing a state in which the seat ring of the valve disc and the valve seat of the valve body are normally in close contact when the pressure of the inflow passage is high,
10 is a plan view showing a clearance formed when the seat ring of the valve disc is formed apart from the valve seat of the valve body when the pressure of the outflow channel is high,
FIG. 11 is a partially enlarged cross-sectional view showing an enlarged view of a region C of the embodiment of FIG. 8,
12 is a side cross-sectional view showing a coupling groove of a first stem supporter member and a first supporter supporting member of a butterfly valve according to the present invention,
13 and 14 are partial enlarged cross-sectional views showing the clearances due to the tolerances of the valve stem, the upper bush, the lower bush and the valve body due to the bolt coupling of the first supporter supporting member.

Hereinafter, an embodiment of a butterfly valve according to the present invention will be described in detail with reference to the accompanying drawings.

The butterfly valve according to the present invention includes a valve body 100, a valve stem 200, a valve disc 300, an operation portion 400, an upper bush 500, a lower bush (not shown) 600, a first stem pushing prevention part 700, and a second stem pushing prevention part 800. The valve body 100 includes an internal passage 130, a valve seat 140, an upper through hole 150 and a lower through hole 160. The valve disc 300 includes a seat ring 310, . ≪ / RTI >

1 to 5, the valve body 100 is formed so that the inflow channel 110 and the outflow channel 120 are communicated with each other through a central inner flow channel 130, and upper and lower through holes 150 And a lower through hole 160 are formed in the inner passage 130, respectively, and an annular valve seat 140 is provided in the inner passage 130. At this time, an inlet pipe is provided in the direction of the inlet flow path 110 of the valve body 100, and an outlet pipe is provided in the direction of the outlet flow path 120 of the valve body 100. An upper through hole 150 and a lower through hole 160 are formed in the valve body 100 so that the valve stem 200 to be described later is inserted into the valve body 100 and is rotatable.

The valve stem 200 is rotatably installed through the valve body 100 as shown in FIGS. As described above, the valve body 100 is rotatably installed to open and close the internal flow path 130 of the valve body 100 by rotating the valve disc 300 described below.

3 to 5, the valve disc 300 is coupled to a lower portion of the valve stem 200 to open and close the internal flow path 130 of the valve body 100, and the internal flow path 130 is closed The seat ring 310 is fixedly installed along the periphery of the surface facing the inflow passage 110 so as to be in close contact with the valve seat 140 of the valve body 100. At this time, the seat retainer is engaged with the outside of the seat ring 310 to fix the valve disc 300 and the seat ring 310. In addition, the seat ring 310 may be made of a soft material or a metal material, depending on the environment in which the butterfly valve is installed and used. In particular, when made of a metal material, it is not deformed when used at a high temperature, and is more effective in preventing leakage than a seat ring 310 made of a soft material.

The operation unit 400 is installed on the valve stem 200 to rotate the valve stem 200 as shown in FIG. At this time, since the valve disc 300 coupled with the valve stem 200 operates in conjunction with each other, the internal flow path 130 of the valve body 100 can be opened and closed. In addition, the operation unit 400 can be selectively installed because it has a manual method and an automatic method. In the case of the manual system, the user directly rotates the lever to move the valve stem 200 to open and close the valve disc 300. In the case of the automatic system, the actuator is installed, and the valve stem 200 And the valve disc 300 is opened and closed.

3 to 5, the upper bush 500 is installed under the upper through-hole 150 of the valve body 100 to rotate and support the outer circumferential surface of the valve stem 200. The upper bush 500 fixes the upper portion of the valve stem 200 to the valve body 100 when the valve stem 200 is rotated by the operation unit 400 to open and close the valve disc 300, Thereby reducing friction.

3 to 5, the lower bush 600 is installed on the lower through-hole 160 of the valve body 100 to rotate and support the outer circumferential surface of the valve stem 200. When the valve stem 200 is rotated by the operating part 400 to open and close the valve disc 300, the lower bush 600 fixes the lower part of the valve stem 200 to the valve body 100, Thereby reducing friction.

As shown in FIGS. 3 and 5, the first stem anti-skid portion 700 is installed above the upper through-hole 150 of the valve body 100, and the valve stem 200 is connected to the outflow channel 110 ) Direction.

At this time, since the valve stem 200 penetrates through the upper through hole 150 and the lower through hole 160 of the valve body 100 and rotates, the necessary rotational tolerance is required for the rotating mechanism. A clearance due to the tolerance of the assembled machine or the machined machine is generated in the valve stem 200 and the upper and lower through holes 150 and 160 of the valve body 100. The seat ring 310 is provided in the valve disc 300 and the valve seat 140 is provided in the valve body 100 so that the inner flow path 130 of the valve body 100 is water tight, Leaks occur. Accordingly, the first stem anti-skid portion 700 is installed in the direction of the outflow channel 120 of the valve stem 200, and the valve stem 200 and the upper through-hole 150 of the valve body 100, Thereby minimizing the clearance caused by the tolerance in the hole 160.

3 and 5, a first supporter groove 151 is formed on the upper surface of the upper through-hole 150 in the direction of the inflow path 110 for installing the first stem anti- As shown in Fig.

The first stem pushing prevention portion 700 provided in the first supporter groove 151 is divided into a first stem supporter member 710 and a first supporter supporting member 720 and is easily installed in a narrow space . As shown in FIG. 5, the first supporter groove 151 is formed so as to be recessed in the shape of a cross section on the side surface so that the longitudinal sides thereof are communicated with and close to the upper through hole 150.

4 and 5, the first stem supporter member 710 is rounded so as to be inserted into the first supporter groove 151 so that one side thereof is in close contact with the outer peripheral surface of the valve stem 200, And a first inclined surface 711 is formed on the side surface. In addition, one side is inserted into the longitudinal side of the first supporter groove 151 so as to contact the outer circumferential surface of the valve stem 200.

The first supporter supporting member 720 is provided on one side of the first stem supporter member 710 to press the first stem supporter member 710 toward the valve stem 200 in a wedge manner as shown in Fig. A first wedge surface 721 symmetrical with the first inclined surface 711 of the first supporter groove 711 and a first fixing bracket 722 protruding from the other side surface of the first wedge surface 721 and coupled to the first supporter groove 151. The first wedge surface 721 is brought into sliding contact with the first inclined surface 711 of the first stem supporter member 710 inserted into the longitudinal side of the first supporter groove 151, The first fixing bracket 722 is bolted to the side of the first supporter groove 151 by pushing the supporter member 710 in the direction of the outflow channel 120. [ As described above, this configuration is to prevent the clearance caused by the tolerance in the direction in which the flow path is formed, thereby partially removing the clearance.

The reason for eliminating the clearance due to the clearance between the valve stem 200 and the upper through-hole 150 and the lower through-hole 160 of the valve body 100 is as follows.

6 to 8, when the butterfly valve is used, when the pressure of the inflow channel 110 is higher than the pressure of the outflow channel 120, the valve stem 200 is pushed by the pressure in the direction of the outflow channel 120 And the valve disc 300 coupled to the valve stem is also pushed toward the outflow channel 120. At this time, as shown in FIG. 9, the seat ring 310 provided on the valve disc 300 is tightly attached to the valve seat 140 of the valve body 100 and is watertight.

When the pressure of the outflow channel 120 is higher than the pressure of the inflow channel 110, the valve stem 200 is pushed in the direction of the inflow channel 110, The disk 300 is also pushed. 10, when the valve disc 300 is pushed in the direction of the inflow channel 110, a gap is formed between the seat ring 310 of the valve disc 300 and the valve seat 140 of the valve body 100 The clearance is generated and the fluid in the outflow channel 120 passes through the clearance and flows into the inflow channel 110 as shown in FIG. This phenomenon is called the reflux phenomenon. The valve stem 200 may be pushed in the direction of the outflow channel 120 through the first stem anti-skid portion so as to prevent the valve stem 200 from being pushed in the direction of the inflow channel 110, as shown in FIG.

As shown in FIG. 12, a second stem anti-skid portion (not shown) is provided on the lower through-hole 160 of the valve body 100 and urges the valve stem 200 toward the outflow channel 120 800). At this time, the valve body 100 is formed with a second supporter groove 161 so as to communicate with the upper portion of the lower through-hole 160 in the direction of the inflow channel 110 on the upper surface thereof. At this time, the second supporter groove 161 is recessed in the shape of '┛' formed on the right side of the vertical side on the side section so that the longitudinal side is communicated with the lower through-hole 160 in close proximity. That is, the second supporter groove is a shape in which the first supporter groove 151 is symmetrical with respect to a virtual plane centered on the longitudinal direction of the valve body 100.

The second stem anti-skid portion 800 is inserted into the second supporter groove 131 and is rounded so that one side thereof is in close contact with the outer circumferential surface of the valve stem 200, and a second slanted surface 811 is formed on the other side And a second stem supporting member 810 formed on one side of the second stem supporter member 810 so as to urge the second stem supporter member 810 toward the valve stem 200 in a wedge manner, A second supporter supporting member 820 formed to have a second wedge surface 821 so as to be symmetrical with the second supporter groove 811 and a second fixing bracket 822 protruding from the other side and coupled to the second supporter groove 161, . ≪ / RTI >

The second stem supporter member 810 is inserted into the longitudinal side of the second supporter groove 161 so that one side of the second stem supporter member 810 contacts the outer circumferential surface of the valve stem 200. The second supporter supporting member 820 is inserted into the second wedge surface 821 along the second inclined surface 811 of the second stem supporter member 810 inserted into the longitudinal side of the second supporter groove 161, And the second fixing bracket 822 is bolted to the side of the second supporter groove 161. The second fixing bracket 822 is engaged with the second fixing bracket 822 by sliding contact with the second stem supporter member 810 in the direction of the outflow channel 120. [

13, when the first fixing bracket 722 of the first supporter supporting member 720 is bolted, the pressure applied to the first inclined surface 711 of the first stem supporter member 710 can be adjusted have.

The first wedge surface 721 of the first supporter supporting member 720 is deeply inserted into the first supporter groove 151 when the bolt is fastened to the first fixing bracket 722 of the first supporter supporting member 720 do. The force exerted by the first inclined surface 711 of the first stem supporter member 710 wedged with the first wedge surface 721 of the first supporter supporting member 720 is increased and the bore of the valve stem 200 is leaked The pressure of pushing in the direction of the flow path 120 increases.

14, when the bolt is loosened on the first fixing bracket 722 of the first supporter supporting member 720, the first wedge surface 721 of the first supporter supporting member 720 is engaged with the first supporter supporting member 720, (151). The force received by the first inclined surface 711 of the first stem supporter member 710 wedged with the first wedge surface 721 of the first supporter supporting member 720 is reduced so that the upper portion of the valve stem 200 flows out So that it is slightly moved in the direction of the flow path 120.

The second wedge surface 821 of the second supporter supporting member 820 is deeply inserted into the second supporter groove 161 when the bolt is fastened to the second fixing bracket 822 of the second supporter supporting member 820 do. The force received by the second inclined surface 811 of the second stem supporter member 810 wedged with the second wedge surface 821 of the second supporter supporting member 820 is increased to cause the lower portion of the valve stem 200 to flow out The pressure of pushing in the direction of the flow path 120 increases.

When the bolt is loosened on the second fixing bracket 822 of the second supporter supporting member 820, the second wedge surface 821 of the second supporter supporting member 820 falls downward in the second supporting groove 161 do. The force received by the second inclined surface 811 of the second stem supporter member 810 wedged with the second wedge surface 821 of the second supporter supporting member 820 is reduced so that the lower portion of the valve stem 200 flows out So that it is slightly moved in the direction of the flow path 120.

Accordingly, since the first fixing bracket 722 of the first supporter supporting member 720 and the second fixing bracket 822 of the second supporter supporting member 820 are bolted to adjust the pressure, the butterfly valve is installed It is possible to effectively prevent leakage according to the conditions.

The pressure applied to the valve stem 200 in the direction of the outflow channel 120 is adjusted so that the valve stem 200 is worn or damaged in the upper through hole 150 and the lower through hole 160 of the valve body 100 And the degree to which the seat ring 310 of the valve disc 300 is pressed against the valve seat 140 of the valve body 100 can be adjusted to reduce the maintenance cost of the butterfly valve.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

100: valve body
110: Inflow channel 120: Outflow channel
130: internal flow path 140: valve seat
150: upper through hole 151: first supporter groove
160: lower through hole 161: second supporter groove
200: Valve stem
300: valve disc 310: seat ring
400:
500: upper bush
600: Lower bush
700: first stem pushing prevention part
710: first stem supporter member 711: first inclined surface
720: first supporter supporting member
721: first wedge surface 722: first fixing bracket
800: 2nd stem anti-skid portion
810: Second stem supporter member 811: Second inclined surface
820: second supporter supporting member
821: second wedge surface 822: second fixing bracket

Claims (6)

A valve body formed so that the inflow passage and the outflow passage are communicated with each other through a central internal passage, upper and lower through holes are formed through the upper and lower portions, respectively, and an annular valve seat is provided in the internal passage; A valve stem that is rotatably installed through the valve body and is coupled to a lower portion of the valve stem to open and close an internal flow path of the valve body and to open and close the internal flow path of the valve body, A valve disc having a seat ring fixedly installed along a circumference of a surface facing the flow path, an operating part installed on an upper portion of the valve stem for rotating the valve stem, An upper bush for rotatably supporting an outer circumferential surface of the valve stem; Basement is provided at the lower bush and the upper upper through-hole of the valve body, comprising a first prevention system jungle portion for urging the valve stem to the outlet flow direction,
Wherein the valve body comprises:
A first supporter groove is formed on the upper surface so as to communicate with the upper portion of the upper through hole in the direction of the inflow passage,
Wherein the first stem-
A first stem supporter member inserted into the first supporter groove and rounded so that one side thereof is brought into close contact with an outer circumferential surface of the valve stem, and a first inclined surface formed on the other side;
A first wedge surface that is symmetrical with the first inclined surface of the first stem supporter member is formed on one side so as to urge the first stem supporter member toward the valve stem in a wedge manner, And a first supporter supporting member formed on the first supporter groove and coupled to the first supporter groove.
delete The method according to claim 1,
The first supporter groove of the valve body,
And the vertical side is recessed in the shape of a cross section on the side surface so as to communicate with the upper through hole,
Wherein the first stem supporter member comprises:
Wherein one side surface is inserted into the longitudinal side of the first supporter groove so as to be in contact with the outer circumferential surface of the valve stem,
Wherein the first supporter supporting member comprises:
The first wedge surface is in sliding contact with the first inclined surface of the first stem supporter member inserted into the longitudinal side of the first supporter groove to urge the first stem supporter member toward the outflow channel, And the first fixing bracket is bolted to the side of the supporter groove.
The method according to claim 1,
Further comprising a second stem anti-skid portion provided under the lower through-hole of the valve body and urging the valve stem in the direction of the outflow channel.
5. The method of claim 4,
Wherein the valve body comprises:
A second supporter groove is formed on an upper surface thereof so as to communicate with a lower portion of the lower through hole in the direction of the inflow passage,
Wherein the second stem-
A second stem supporter member inserted into the second supporter groove and rounded so that one side thereof is in close contact with an outer peripheral surface of the valve stem, and a second inclined surface is formed on the other side;
A second wedge surface is formed on one side of the second stem supporter member to be symmetrical with the second inclined surface of the second stem supporter member in a wedge manner so as to urge the second stem supporter member toward the valve stem, And a second supporter supporting member formed to be coupled to the second supporter groove.
6. The method of claim 5,
The second supporter groove of the valve body,
And the vertical side is recessed in the shape of " ┛ " formed on the right side of the vertical side on the side surface so as to communicate with the lower through-
Wherein the second stem supporter member comprises:
Wherein one side surface is inserted into the longitudinal side of the second supporter groove so as to be in contact with the outer circumferential surface of the valve stem,
Wherein the second supporter supporting member comprises:
The second wedge surface is in sliding contact with the second inclined surface of the second stem supporter member inserted into the longitudinal side of the second supporter groove to urge the second stem supporter member toward the outflow channel, And the second fixing bracket is bolted to a transverse side of the supporter groove.

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