KR101029685B1 - Multi-valve having pressure adjustment valve - Google Patents

Abstract

PURPOSE: A composite valve comprising a pressure control valve is provided to facilitate remote control of a main valve installed in a pipeline through the pressure control valve. CONSTITUTION: A composite valve comprises a main valve(100), an actuator(200), and a pressure control valve(300). The main valve is installed in the middle of a pipeline(4). The actuator is connected to the main valve and operated with high pressure air provided from an air compressor(5) to control the opening/closing degree of the main valve. The pressure control valve, to which a pressure control line(8) and a pressure deliver line(9) are connected, controls the pressure of the air provided to the actuator by the pressure difference between the air supplied through the pressure control line and the fluid transferred through the pressure deliver line, thereby controlling the opening/closing of the main valve.

Description

Multi-valve having pressure adjustment valve

The present invention relates to a composite valve having a pressure regulating valve, and more particularly, a composite valve having a pressure regulating valve for automatically controlling the opening and closing of a main valve by interlocking a pressure of a fluid flowing in a pipe with a set pressure. It is about.

In general, the valve is a device that is installed in the middle of the pipeline or the container to control the flow rate or pressure of the fluid, such a valve is manufactured in a variety of structures depending on the purpose of use, the physical and chemical properties of the fluid and the method of operation. have.

Valves are generally classified into opening and closing valves and flow control valves according to a function of blocking a flow of a fluid or adjusting a flow rate or a pressure, and the valves classified as such are water, air, steam, gas, oil, chemicals, etc. It is installed and used at various positions in various pipe lines for conveying oil.

However, the conventional valve is installed in the pipe line far from the operator, and in order to adjust the flow rate or pressure of the conveyed fluid, the operator must directly go to the position where the valve is installed and adjust the pressure or flow rate of the fluid flowing in the pipe. There was a problem in that the regulation could not be timely and remotely remote.

In particular, in the production line for manufacturing styrofoam with foamed resin, high-quality products can be manufactured only when the fluid in the pipe is supplied at a constant flow rate and pressure. There was a difficulty in providing a constant supply of the required fluid because it had to be adjusted.

In addition, when a problem such as damage occurs in the piping line, the main valve should be closed quickly to shut off the supply of fluid. Since the installation position of the main valve is far away, the operator cannot close the valve quickly. There was a problem that can not prevent the accident in advance.

In addition, since the valve is generally made of cast iron, in relation to the fluid used, problems such as corrosion due to the chemical properties of the fluid and erosion depending on the physical properties are raised with respect to the fluid used. In addition, when the scale is to be removed in the pipe of the valve installed part, the valve has to be disassembled as a whole.

On the other hand, in order to solve this problem, a pressure sensor is provided in the pipe line, and a method of automatically controlling the opening and closing amount of the valve using a control device for receiving a signal of the pressure sensor has been proposed, but such a control method is very expensive. Not only does it work but it does not work quickly.

Therefore, there is a demand for technology development of a composite valve that can open and close the main valve installed in a pipe line quickly and remotely in a timely manner.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a composite valve having a pressure control valve for controlling the main valve installed in the pipe line to be quickly and remotely controlled automatically.

The present invention for achieving the above object, and the main valve connected to the intermediate portion of the pipe line; An actuator connected to the main valve and operated by high pressure air supplied from an air compressor to adjust the opening and closing amount of the main valve; It is provided with an intermediate portion of the air supply line connecting the actuator and the air compressor is composed of a pressure control valve for adjusting the pressure of the air supplied to the actuator; The pressure control line is connected to a pressure control line for supplying air of a predetermined constant pressure and a pressure transfer line connected to a pipe line at the rear end of the main valve to transfer the pressure of the fluid passing through the main valve, respectively, to control the pressure. Provides a composite valve with a pressure control valve characterized in that the main valve is controlled by adjusting the pressure of the air supplied to the actuator by the pressure difference of the air supplied through the line and the pressure difference of the fluid delivered through the pressure transfer line. do.

In the present invention, the air supply line of the front end of the pressure control valve is characterized in that the solenoid valve is installed.

In the present invention, the main valve, the valve housing is formed therein is connected to the pipe line, and the disk housing coupled to the valve housing forward and backward to open and close the flow path, the disk connected to the outside of the valve housing Consisting of an extended valve stem; The actuator is a cylinder coupled to the valve housing, a piston that is hermetically installed inside the cylinder and is coupled to the valve stem, and connected to the piston to move forward in a direction in which the piston, the valve stem and the disc seal the flow path. It is composed of a spring to pressurize as possible, the piston of the actuator is reversed by the pressure of the air supplied into the cylinder, characterized in that to open the flow path of the main valve.

In the present invention, the pressure control valve, the housing body is formed with a communication hole connected to the intermediate portion of the air supply line and the pressure control hole to cross the communication hole, the stem slidably installed in the pressure control hole, and A first diaphragm and a second diaphragm coupled to both ends of the stem and defining a first pressurizing chamber and a second pressurizing chamber, the first pressurizing chamber being defined within the housing body and the pressure adjusting hole; A valve seat is formed in the pressure regulating hole, and the stem is provided with a close contact with the valve seat; The pressure control line is connected to the first pressure chamber, the pressure transfer line is connected to the second pressure chamber, the pressure difference between the air pressure applied to the first pressure chamber and the pressure applied to the second pressure chamber, The stem is moved forward and backward to open and close the pressure regulation hole.

In the present invention, the pressure control line, the air supply pipe connected to the air compressor, and is provided in the middle of the air supply pipe includes a regulator for adjusting the pressure of the air supplied to the first pressure chamber through the air supply pipe It features.

In the present invention, the valve housing of the main valve is formed with a drain opening in the opposite direction to the extending direction of the valve stem, characterized in that the cover is coupled to the drain.

The present invention provides the following effects by the means for solving the problem.

According to the present invention, the high pressure air supplied from the air compressor to operate the actuator through the communication hole and the pressure control hole of the pressure control valve connected to the pressure control line and the pressure transmission line to automatically open and close the main valve connected to the actuator, The pressure control valve has the effect of easily controlling the main valve installed in the pipe line at a remote location.

In addition, when a problem such as damage occurs in the piping line, the solenoid valve for supplying the high pressure air connected to the pressure regulating valve is operated to quickly shut off the high pressure air supplied to the actuator, thereby preventing accidents in the piping line. There is an effect that can be prevented.

In addition, by disassembling the cover of the drain formed on the lower end of the main valve installed in the pipe line, there is an effect that can easily remove the scale of foreign matters accumulated in the valve housing.

1 is a block diagram showing an installation state of the composite valve with a pressure control valve according to the present invention.
Figure 2 is a side cross-sectional view showing the main valve and the actuator of the composite valve with a pressure control valve according to the present invention.
Figure 3 is a side cross-sectional view showing the operating state of the main valve and the actuator of the composite valve with a pressure control valve according to the present invention.
Figure 4 is an exploded perspective view showing a pressure control valve of the composite valve with a pressure control valve according to the present invention.
Figure 5 is a side cross-sectional view showing an exploded state of the pressure control valve of the pressure control valve according to the present invention.
Figure 6 is a side cross-sectional view showing a pressure control valve of the composite valve with a pressure control valve according to the present invention.
Figure 7 is a side cross-sectional view showing the operating state of the pressure control valve of the composite valve with a pressure control valve according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 illustrate a composite valve having a pressure control valve according to the present invention.

Referring first to FIG. 1, the present invention relates to a pipe line 4 for supplying a fluid to a place 1, 2 of various fluids (eg, water, air, steam, gas, oil, chemicals, etc.). The main focus is to control the opening and closing of the main valve 100 installed in the middle part so that the flow rate of the constant pressure is supplied to the use place (1, 2).

At this time, the pipe line 4 is branched as necessary to be configured to supply various fluids to the use (1, 2), the composite valve of the present invention is arranged in a predetermined position of the branched pipe line (4) do.

As shown in FIG. 1, the present invention is connected to the main valve 100 installed in the middle of the pipe line 4 and to the high pressure air connected to the main valve 100 and supplied from the air compressor 5. It is operated by the actuator 200 for adjusting the opening and closing amount of the main valve 100, and is provided in the middle of the air supply line 6 for connecting the actuator 200 and the air compressor 5 and the actuator 200 It consists of a pressure control valve 300 for adjusting the pressure of the air supplied to, and the solenoid valve 400 installed at a predetermined position of the air supply line 6 connected to the front end of the pressure control valve (300).

As shown in FIGS. 2 and 3, the main valve 100 includes a valve housing 110 in which a flow path 111 connected to the piping line 4 is formed, and moves forward and backward to the valve housing 110. The disk 120 which is coupled to open and close the flow path 111 and the valve stem 130 connected to the disk 120 and extended out of the valve housing 110.

The valve housing 110 has openings 112 formed at both sides thereof to which the flow path 111 is connected, and flanges 113 are provided at the circumference of the opening 112 to connect the valve housing 110 to the pipe line 4. It is configured to be coupled to the middle of the fixed).

In addition, the valve seat 114 facing upward is formed in the middle portion of the flow path 111, and the disk 120 is provided with a packing 121 in close contact with the upper surface of the valve seat 114 on the lower surface. It is configured to open and close the flow path 111 in accordance with the lifting and lowering of 120.

The valve stem 130 extends outward from the upper portion of the valve housing 110 at the center of the disk 120 and is coupled to the piston 220 of the actuator 200.

Therefore, as shown in FIG. 3, when the valve stem 130 is pulled upward, the disk 120 is spaced apart from the valve seat 114 to open the flow path 111 so that fluid flows through the flow path 111. It becomes possible.

In this case, a drain 140 having the same diameter as the valve seat 114 is formed at the center of the lower side of the valve housing 110, and the cover 150 is screwed to the drain 140 to separate the cover 150. The lower surface of the valve housing 110 is configured to easily discharge the scale, such as foreign matter.

In addition, the O-ring 160 and the spring 170 is coupled between the circumferential surface of the valve stem 130 and the valve housing 110 to press the O-ring 160 by the spring 170 to the valve stem 130. It is configured to hermetically seal between the valve housing 110 and.

As shown in FIGS. 2 and 3, the actuator 200 has a cylinder 210 fixedly coupled to the valve housing 110, and is airtightly installed inside the cylinder 210 and the valve stem 130. A spring coupled to the piston 220 and connected to the piston 220 to elastically press the piston 220, the valve stem 130, and the disk 120 to move forward in a direction to seal the flow path 111. 230.

The cylinder 210 has a cylinder body 211 formed in a cylindrical shape with an open lower end, and a diaphragm 212 securely coupled to the lower end of the cylinder body 211 and fixed to an upper end of the valve housing 110. Composed of, the central portion of the diaphragm 212 is formed with a coupling hole 213 through which the valve stem 130 passes.

The piston 220 is installed in the cylinder 210 to divide the space inside the cylinder 210 into the upper chamber 240 and the lower chamber 250, when the high pressure air is supplied to the lower chamber 250 It is pushed upward to lift the valve stem 130 and the disk 120 of the main valve 100 to the upper side to function to open the flow path (111).

To this end, an air supply port 260 to which the air supply line 6 is connected is formed at a lower end side of the cylinder 210 so as to communicate with the lower chamber 250, and an upper portion at an upper circumferential surface of the cylinder 210. Aeration hole 270 is connected to the chamber 240 is formed.

The spring 230 is composed of a compression coil spring, and is installed in the upper chamber 240 to pressurize the piston 220 to the lower side, the piston 220 and the valve stem 130 and the disk 120 It lowers to the lower side to close the flow path 111.

Therefore, as shown in FIG. 3, when the high pressure air is supplied into the lower chamber 250 through the air supply line 6, the piston 220 is raised and the flow path 111 of the main valve 100 is raised. Open the air, in this case, the air inside the upper chamber 240 is discharged to the outside through the vent 270.

And, when the pressure of the air supplied to the lower chamber 250 is lowered, as shown in Figure 2, the piston 220 is lowered by the elastic force of the spring 230, the flow path 111 of the main valve 100 Is closed, at this time, the air inside the lower chamber 250 is discharged by flowing back the air supply line (6) and the outside air is introduced into the upper chamber 240 through the vent hole 270.

4 to 7, the pressure control valve 300, the communication hole 315 connected to a predetermined position of the middle portion of the air supply line 6, and the pressure intersecting the communication hole 315 A housing body 311 made of a brass material having an adjustment hole 316, a stem 320 slidably installed in the pressure control hole 316, and a housing body coupled to both ends of the stem 320. A first diaphragm 330 and a second diaphragm 340 forming a first pressurizing chamber 360 and a second pressurizing chamber 370 which are partitioned from the pressure regulating hole 316 inside the 311; It consists of a washer 350 coupled to the first diaphragm 330 and the second diaphragm 340, the pressure control line 8 is connected to the first pressure chamber 360, the second pressure The pressure transmission line 9 is connected to the chamber 370.

In addition, upper and lower ends of the housing body 311 are coupled to upper and lower covers 312 and 313 made of aluminum to fix the first diaphragm 330 and the second diaphragm 340, and the upper and lower covers 312 and 313 are vertically coupled. It consists of a set screw 314 to penetrate the upper cover 312, 313 to the housing 311.

At this time, the communication hole 315 penetrates both sides of the housing body 311, and the pressure control hole 316 is formed through the upper and lower surfaces of the housing body 311 so as to cross at a right angle with the communication hole 315. On the upper side, a valve seat 316a to which the stem 320 is in close contact is formed.

In addition, upper and lower concave portions 311a and 311b are formed on the upper and lower surfaces of the housing body 311 so that the first diaphragm 330 and the second diaphragm 340 may flow, and the upper concave portion 311a may be formed. In the periphery of the) is formed a vent hole (311c) connecting the inside of the upper concave portion (311a) and the outer space of the housing body (311).

In addition, concave grooves 312a and 313a corresponding to upper and lower concave portions 311a and 311b are formed on opposite surfaces facing the housing body 311 from the upper and lower covers 312 and 313, respectively. In the central portion, connection ports 312b and 313b, to which the pressure control line 8 and the pressure transmission line 9 are connected, are formed to penetrate the upper and lower surfaces, respectively.

The stem 320 is configured in the form of a long rod up and down is coupled to the inside of the pressure control hole 316 so that the upper and lower ends protrude to the upper and lower ends of the housing body 311, the lower end of the pressure control hole 316 It is airtightly fitted in the interior and the upper portion is formed in close contact 321 is in close contact with the valve seat (316a).

Therefore, when the stem 320 is lowered, the close contact portion 321 is in close contact with the valve seat 316a to close the upper end of the pressure regulating hole 316 so that the high pressure air supplied through the air supply line 6 communicates. It is supplied to the actuator 200 through the ball 315, when the stem 320 is raised, the close contact portion 321 is spaced from the valve seat 316a to open the air supply line by opening the pressure control hole 316 High pressure air supplied through the (6) is to be discharged to the outside of the housing body 311 through the pressure adjusting hole 316 and the upper concave portion (311a) and the vent hole (311c).

At this time, the valve seat 316a is configured to increase the inner diameter toward the upper side, the contact portion 321 is also configured in a cone shape of the diameter increases toward the upper side, the pressure of the air passing through the communication hole 315 By doing so, the stem 320 can be pushed upward.

In addition, the narrow portion 322 is formed in the middle portion of the stem 320 is reduced in diameter is configured to minimize the resistance generated in the flow of air passing through the communication hole 315.

The first diaphragm 330 and the second diaphragm 340 are composed of a sheet having elasticity of Viton material, and fixed between the upper and lower surfaces of the housing body 311 and the upper and lower covers 312 and 313. The upper and lower concave grooves 312a and 313a of the upper and lower covers 312 and 313 are hermetically sealed to form an upper first pressurizing chamber 360 and a lower second pressurizing chamber 370.

At this time, the first and second diaphragms 330 and the second diaphragm 340 has a coupling washer 350 formed in the upper and lower ends of the metal washer 350 formed with a coupling hole 351 in the central portion ( By being coupled to the 323, the upper and lower ends of the stem 320 are firmly coupled to the first diaphragm 330 and the second diaphragm 340.

The pressure control line 8 is configured by installing a regulator (8b) for adjusting the pressure of the air at a predetermined position in the middle portion of the air supply pipe (8a) connected to the air compressor (5), It is connected to the connection port 312b to set the high-pressure air supplied from the air compressor 5 to a constant pressure and supply it to the first pressure chamber 360. Since the regulator 8b is widely used as a mechanism for regulating pressure in a general pneumatic system, a detailed description thereof will be omitted.

The pressure transmission line 9 is connected to a branch pipe 4a provided at the rear end of the main valve 100, preferably immediately before the portion connected to the fluid use points 1 and 2 in the pipe line 4. And the connection port 313b of the lower cover 313 to transfer the pressure of the fluid before being supplied to the fluid use places 1 and 2 to the second pressure chamber 360.

Accordingly, the first diaphragm 330 and the second diaphragm 340 are acted upon by the air pressure applied to the first pressurizing chamber 360 and the second pressurizing chamber 370 and the pressure of the transferred fluid. In this case, the stem 320 acts in the up and down direction, and when the set pressure of the air applied to the first pressure chamber 360 and the fluid pressure applied to the second pressure chamber 370 are different from each other, the stem 320 ) Is raised and lowered to open and close the pressure control hole (316).

The solenoid valve 400 is installed at a predetermined position of the air supply line 6 such that the solenoid valve 400 is positioned at an intermediate portion of the air compressor 5 and the pressure regulating valve 300. For example, the flow path of the main valve 100 by the actuator 200 by blocking the flow of air supplied to the actuator 200 through the air supply line 6 in accordance with a separate control signal in the control room or control room) Allow 111 to close quickly to prevent accidents.

Meanwhile, the air supply line 6, the pressure control line 8, and the pressure transmission line 9 connected to the air compressor 5 and the pressure regulating valve 300 have high strength and excellent heat resistance or chemical resistance. Connect with the pressure control valve 300, but the length is adjusted as necessary to adjust the pressure control valve 300 in the remote (for example, control room or control room).

In the accompanying FIG. 1, reference numeral 6a denotes a regulator that is provided in the air supply line 6 to constantly control the pressure of air supplied through the air supply line 6, and FIGS. 5 to 7. Reference numeral 311d denotes a vent hole formed in the circumferential surface of the lower recess 311b to allow air in the lower recess 311b to circulate when the stem 320 is elevated.

Referring to the operation of the present invention configured as described above are as follows.

First, when high pressure air is supplied from the air compressor 5 through the air supply line 6 and the pressure control line 8, the high pressure air supplied to the pressure control line 8 is supplied to the pressure control line 8. It is set to a constant pressure by the installed regulator (8b) is supplied to the first pressure chamber 360 of the pressure control valve 300, the high pressure air supplied to the air supply line (6) of the pressure control valve (300) It is supplied to the actuator 200 connected to the pressure control valve 300 through the communication hole 315 and the pressure adjusting hole 316, the high pressure air supplied in this way is in the cylinder body 211 of the actuator 200 The piston 220 is pushed up, and as the piston 220 is pushed up, the valve stem 130 and the disk 120 coupled with the piston 220 are lifted up, so that the main valve installed in the pipe line 4 ( The flow path 111 of the 100 is opened to supply the fluid.

At this time, the pressure of the fluid supplied through the pressure transfer line 9 connected to the branch pipe 4a of the pipe line 4 is applied to the second pressure chamber 370 of the pressure control valve 300, the second When the pressure of the fluid applied to the pressure chamber 370 is lower than the pressure of the air applied to the first pressure chamber 360, as shown in FIG. 6, the stem 320 is lowered to adjust the pressure adjusting hole 316. Since it prevents the high-pressure air supplied through the air supply line 6 is continuously supplied to the actuator 200 through the communication hole 315.

Therefore, as shown in FIG. 3, when the piston 220 is lifted up by the pressure of the air supplied to the actuator 200, the valve stem 130 and the disc of the main valve 100 connected to the piston 220. As the 120 rises upward, the flow path 111 is opened, and the fluid continues to be supplied to the place of use 1 and 2 through the flow path 111 and the pipe line 4.

In addition, when the flow rate 111 of the main valve 100 is opened to increase the flow rate of the fluid supplied to the fluid use points 1 and 2 through the pipe line 4, the pressure inside the pipe line 4 increases. Accordingly, when the pressure of the fluid applied to the second pressure chamber 370 rises above the pressure of air supplied to the first pressure chamber 360, as shown in FIG. 7, the pressure regulating valve 300 is shown. The stem 320 is raised to open the pressure regulation hole 316, so that the air supplied through the air supply line 6 is discharged to the outside through the pressure regulation hole 316 and the vent hole (311c) do.

Therefore, the pressure of the air supplied to the actuator 200 is lowered, and as shown in FIG. 2, the piston 220, the valve stem 130, and the disk 120 are lowered by the spring 230. It is to gradually close the flow path 111.

According to the present invention, the pressure and the pressure control of the fluid supplied to the fluid use place (1, 2) are repeated when the pressure applied to the first pressure chamber 360 and the second pressure chamber 370 is the same by repeating the above process. When the pressure of the air supplied through the line 8 becomes the same, the valve stem 130 of the main valve 100 stops lifting, and accordingly, air of a constant pressure is supplied to the actuator 200 so that the main The flow path 111 of the valve 100 is maintained in an open state to a certain degree.

At this time, when the pressure of the fluid supplied to the fluid use destination (1, 2) is changed by various factors, the above-described process is repeated, the opening degree of the flow path 111 of the main valve 100 is automatically adjusted to the pressure of the fluid This will remain constant.

When the pressure of the fluid supplied to the fluid use place (1, 2) is to be adjusted, the set value of the regulator (8b) installed in the pressure control line (8) is changed to adjust the pressure of the air supplied to the first pressure chamber (360). By changing the set pressure, it is possible to adjust the pressure and the flow rate of the fluid supplied to the fluid use place (1, 2).

In addition, in the event of damage to the piping line 4 or other various accidents, the main valve is operated by operating the solenoid valve 400 at a remote location (for example, a control room or a control room) to shut off the air supply line 6. The flow path 111 of the 100 can be quickly closed to block the supply of the fluid.

In the composite valve of the present invention configured as described above, the stem 320 of the pressure regulating valve 300 is actuated to open and close the pressure regulating hole 316 according to the difference between the pressure of the fluid supplied to the fluid use place 1 and 2 and the set pressure. By doing so, the air supplied through the communication hole 315 is selectively discharged to the outside to adjust the pressure of the air supplied to the actuator 200.

Therefore, the actuator 200 passes the main valve 100 by opening and closing the flow path 111 of the main valve 100 by raising and lowering the valve stem 130 and the disk 120 of the main valve 100 appropriately. The pressure of the fluid can be adjusted automatically automatically.

In particular, since the opening and closing amount of the main valve 100 is determined according to the difference between the pressure of the fluid supplied to the fluid use place (1, 2) and the set pressure, such a composite valve is not only quick reaction due to pressure fluctuation but also operation of the valve. The reliability is increased.

In addition, the solenoid valve 400 is provided at the front end of the pressure regulating valve 300, so that in the event of damage to the piping line 4 or other various accidents, a remote place (for example, a control room or a control room) may be used. By closing the air supply line 6 it is possible to close the flow path 111 of the main valve 100 to block the supply of fluid.

In addition, the pressure control line 8 for supplying air of the set pressure is provided with a regulator 8b. By operating the regulator 8b to adjust the set pressure as necessary, the opening and closing amount of the main valve 100 and the main valve are controlled. It is possible to freely adjust the pressure of the fluid supplied to the place to pass through the (100).

In particular, the pressure control valve 300 is connected to the main valve 100 through the air supply line 6 and installed in a position where the operator can easily operate the regulator (8b) connected to the pressure control valve (300). The operator can operate at a remote location (for example, a control room or a control room), so that a quick response can be made in the event of an emergency in the pipeline.

In addition, since the drain 140 is formed in the valve housing 110 of the main valve 100 in the direction opposite to the extending direction of the valve stem 130, the cover 150 coupled to the drain 140 is formed. When separated, it is possible to easily remove the scale, such as foreign matter inside the main valve (100).

 Meanwhile, the upper and lower covers 312 and 313 coupled to the housing body 311 and the housing body 311 are made of brass and aluminum, respectively, in order to prevent corrosion and erosion due to physical properties of the fluid. .

4: Piping line 6: Air supply line
8: pressure control line 9: pressure transfer line
100: main valve 200: actuator
300: pressure regulating valve 400: solenoid valve

Claims (8)

A main valve 100 installed at an intermediate portion of the piping line 4; An actuator (200) connected to the main valve (100) and operated by high pressure air supplied from an air compressor (5) to control the opening and closing amount of the main valve (100); It is composed of a pressure control valve 300 is provided in the middle of the air supply line 6 for connecting the actuator 200 and the air compressor 5 to adjust the pressure of the air supplied to the actuator 200; The pressure control line 300 is connected to a pressure control line 8 to which air of a set pressure is supplied, and a pressure transfer line 9 connected to a pipe line 4 at the rear end of the main valve 100 to transfer the pressure of the fluid. These are connected to each other, by adjusting the pressure of the air supplied to the actuator 200 by the pressure difference between the pressure of the air supplied through the pressure control line (8) and the fluid delivered through the pressure transfer line (9) Composite valve with a pressure control valve, characterized in that for controlling the opening and closing of the main valve (100). The method according to claim 1,
The air supply line (6) of the front end of the pressure control valve 300, the solenoid valve 400 is equipped with a pressure control valve, characterized in that the valve is installed. The method according to claim 1,
The main valve 100 is coupled to the valve housing 110 formed therein and the flow path 111 connected to the pipe line 4 and the valve housing 110 to be moved forward and backward to open and close the flow path 111. A disk 120 and a valve stem 130 connected to the disk 120 and extending out of the valve housing 110; The actuator 200 includes a cylinder 210 coupled to the valve housing 110, a piston 220 installed in an airtight manner within the cylinder 210, and coupled to the valve stem 130, and the piston. Is connected to the 220 and the piston 220 and the valve stem 130 and the disk 120 is composed of a spring 230 for pressing to advance in the direction to seal the flow path 111, the inside of the cylinder 210 The piston 220 of the actuator 200 is raised by the pressure of the supplied air to open the flow path 111 of the main valve 100, characterized in that the combined valve with a pressure control valve. The method according to claim 1,
The pressure control valve 300, the housing body 311 is formed with a communication hole 315 connected to the intermediate portion of the air supply line 6 and the pressure control hole 316 intersecting the communication hole 315 and The stem 320 is slidably installed in the pressure regulating hole 316, and is coupled to both ends of the stem 320 and partitioned from the pressure regulating hole 316 in the housing body 311. The first diaphragm 330 and the second diaphragm 340 forming the first pressure chamber 360 and the second pressure chamber 370, and the upper and lower covers 312 and 313 coupled to the housing body 311, ; A seat 316a is formed in the pressure regulating hole 316 and a close contact portion 321 is formed in the stem 320 in close contact with the seat 316a; The pressure control line 8 is connected to the first pressure chamber 360, the pressure transfer line 9 is connected to the second pressure chamber 370, the air applied to the first pressure chamber 360 The composite valve with a pressure regulating valve, characterized in that the stem 320 is raised and lowered by the pressure difference between the pressure and the fluid applied to the second pressure chamber 370 to open and close the pressure regulation hole (316). The method according to claim 1,
The pressure control line 8 is provided with an air supply pipe 8a connected to the air compressor 5 and an intermediate portion of the air supply pipe 8a to provide a first pressure chamber 360 through the air supply pipe 8a. Combination valve with a pressure control valve, characterized in that it comprises a regulator (8b) for adjusting the pressure of the air supplied to. The method according to claim 1,
The valve housing 110 of the main valve 100 is formed with a drain 140 opened in a direction opposite to the extending direction of the valve stem 130, and the cover 140 is coupled to the drain 140. Composite valve with pressure control valve. The method according to claim 1,
The air supply line (6) and the pressure control line (8) and pressure transmission line (9) is a composite valve with a pressure control valve, characterized in that using a Teflon hose of a certain length. The method according to claim 4,
The housing body 311 of the pressure control valve 300 is made of brass, the upper and lower cover 312,313 coupled to the housing body 311 is a composite valve with a pressure control valve, characterized in that the aluminum material.

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