KR100561207B1 - Diaphragm-typed valves of differetial operation - Google Patents

Abstract

The present invention relates to a differential pressure actuated diaphragm valve capable of controlling the opening degree of a valve by using a pressure difference of a pipe and performing various functions according to a pilot selection. The valve body having an inlet and an outlet through which a fluid passes and In the differential pressure actuated diaphragm valve having a cover for blocking the upper end of the valve body and a diaphragm for controlling the flow rate, a seat 130 is provided to open and close the flow path between the inlet 110 and the outlet 120. A valve body 100 in which main flow of the fluid is made; A cover 200 which is provided with a cover plug 250 for blocking the control hole 215 and the control hole 215 from the outside and the flow rate is adjusted outside the valve; An auxiliary flow path connecting the valve body 100 and the cover 200 is formed, and an intermediate diaphragm 220 is inserted between the valve body 100 and the cover by inserting a diaphragm 410 at an upper end thereof to form a double chamber structure. )and; A disk 420 interlocked with the diaphragm 410 and detachable from the seat 130 is provided, and a piston 430 for axially connecting the diaphragm 410 and the disk 420 is provided according to a hydraulic vehicle. A diaphragm assembly 400 to be moved; It is fixed to the intermediate plate 220 to guide the movement of the piston 430 on the inner circumferential surface, the air chamber 510 is provided with a vacuum formed by the high-speed movement of the piston 430 is provided with an impact due to rapid flow rate change A guide bushing 500 for alleviating the pressure; And an auxiliary conduit path in which an auxiliary inflow path and an auxiliary outflow path are formed in the valve body 100 and the cover 200, and are connected to each other to control the main flow of the fluid. The main body 100 has drain holes 115 and 125 formed below the inlet 110 and the outlet 120, and a hemispherical strainer 315 is formed at the inlet of the valve body auxiliary inlet pipe 310, and the cover plug 250 ) Is provided with a flow control shaft 251, a limit switch 252, a position indicator 253 and the like to control or display the flow rate and the hydraulic pressure as a technical gist, and the flow rate or pressure change Does not generate shock in the valve even when it occurs suddenly, and vibration and noise are canceled to improve the life of the valve, and it is easy to control the flow rate of the pipe and measure the hydraulic pressure so that the flow rate is efficiently controlled. Repair and cleaning work is possible without the hassle caused by the flow rate.

Valve, Diaphragm, Vibratory Hydraulic Control Device

Description

Diaphragm-typed valves of differetial operation

1-A front sectional view of a conventional differential pressure actuated diaphragm valve.

2 is a front sectional view of a differential pressure actuated diaphragm valve according to the present invention.

3 is a front sectional view of a diaphragm valve having a flow regulating shaft according to the present invention.

4-A front sectional view of a diaphragm valve with a limit switch according to the invention.

5-A front sectional view of a diaphragm valve with a position indicator according to the invention.

6-a front sectional view showing the operating principle of the differential pressure actuated diaphragm valve according to the present invention.

7 is a side cross-sectional view showing a state in which a strainer is installed on the diaphragm valve according to the present invention.

<Description of Major Symbols Used in Drawings>

100: valve body 110: inlet

115: inlet side drain hole 120: outlet

125: outlet side drain hole 130: seat portion

135: seating 200: cover

215: control hole 220: intermediate plate

230: double chamber 250: cover plug

251: flow control shaft 252: limit switch

253: position indicator 310: valve body auxiliary inlet pipe

315: strainer 320: valve body auxiliary outlet pipe

330: chamber auxiliary inlet pipe 340: chamber auxiliary inlet pipe

400: diaphragm assembly 410: diaphragm

415: diaphragm plate 420: disk

425: disc seat 430: piston

500: guide bushing 510: air chamber

The present invention relates to a differential pressure actuated diaphragm valve that can control the opening degree of a valve by using a pressure difference of a pipe and can perform various functions according to pilot selection. The present invention relates to a differential pressure actuated diaphragm valve for mitigating impact caused by a pressure difference, adding flow rate control and hydraulic measurement function of a pipe, and forming a residual leak hole to facilitate disassembly and cleaning.

In general, the valve is installed in the vessel or in the vessel to control the flow rate and pressure of the fluid, and the opening of the flow path is controlled by using a spring and a diaphragm installed in the valve. The springless diaphragm valve has the advantage that the diaphragm is precisely controlled by controlling the pressure in the chamber chamber according to the pressure fluctuation, dispersing the pressure of the sealing portion and preventing the diaphragm shape change, thereby extending the life of the diaphragm.

Figure 1 shows a front sectional view of a differential pressure actuated diaphragm valve conventionally used. (a) shows a fully open state, and (b) shows a fully blocked state.

The conventional differential pressure actuated diaphragm valve comprises a valve body portion 10 and a diaphragm assembly 20, the valve body portion 10 of the inlet 11, outlet 12, seat portion 13 and the valve It is composed of a cover 14, which is an upper cover, to form a main body structure. The diaphragm assembly 20 is composed of a diaphragm 21, a disk 22, and a piston 23, and is mounted inside the valve body 10. .

The valve body portion 10 has a seat portion 13 to open and close the fluid flow path between the inlet 11 and the outlet 12 is formed, the cover 14 and the inlet 11 and the outlet 12 side An auxiliary pipe is formed to control the flow rate and the hydraulic pressure.

When the inlet pressure is higher than the set pressure, a portion of the fluid is flowed to the inlet side auxiliary pipe 31 to flow through the cover 14 to the outlet side without passing through the main pipe to adjust the flow rate and the hydraulic pressure, and the cover ( Closing the outlet side auxiliary conduit 34 formed in 14) closes the flow path by downward movement of the diaphragm assembly 20.

The diaphragm assembly 20 is connected to the diaphragm 21 fitted between the valve body cover 14 and the main body, and a piston 23 connected to the diaphragm 21 to fix and stabilize the movement of the diaphragm assembly 20. ), A disk 22 formed below the piston 23 and connected to the diaphragm 21 to move at the same displacement to control the opening and closing of the flow path in the seat portion 13.

The differential pressure actuated diaphragm valve has a sudden change in flow velocity in the pipeline, and when the fluid pressure rises or falls rapidly, the diaphragm opens and closes rapidly, resulting in water drops, vibration, and noise. In order to explicitly check the hydraulic pressure, it was cumbersome to install a separate flow control and hydraulic measuring device.

Therefore, the present invention devised to solve the above problems is to mitigate the impact caused by the flow rate or pressure difference in the valve, the flow rate adjustment and hydraulic pressure measurement function of the pipe is added, the differential pressure to facilitate repair and cleaning work It is an object to provide an actuated diaphragm valve.

The present invention for achieving the object as described above, in the differential pressure acting diaphragm valve is provided with a valve body provided with an inlet and an outlet through which the fluid passes, a cover to block the upper end of the valve body, a diaphragm for controlling the flow rate A valve body provided with a seat portion configured to open and close a flow path between the inlet and the outlet path, and the main flow of the fluid; A cover having a control hole penetrated to the outside and a cover plug to block the control hole from the outside to control the flow rate outside the valve; An intermediate plate having an auxiliary flow path connecting the valve body and the cover to be inserted between the valve body and the cover by inserting a diaphragm at an upper end thereof to form a double chamber structure; A diaphragm assembly interlocked with the diaphragm and provided with a disk detachable from the seat, a piston for axially connecting the diaphragm and the disk to move in accordance with a hydraulic vehicle; A guide bushing fixed to the intermediate plate to guide the piston movement on an inner circumferential surface, and having an air chamber in which a vacuum is formed by the high-speed movement of the piston to mitigate an impact caused by a sudden flow rate change; A differential pressure-actuated diaphragm valve is formed in the valve body and the cover, and includes an auxiliary conduit configured to form an auxiliary flow path and an auxiliary flow path connected to each other to control the main flow of the fluid. do.

Here, the valve body is a drain hole is formed in the inlet and the outlet lower side, it is preferable that the hemispherical strainer is formed at the inlet of the auxiliary inlet pipe of the valve body is naturally cleaned.

In addition, the cover plug is preferably provided with a flow control shaft, a limit switch, a position indicator to control or display the flow rate and hydraulic pressure.

The differential pressure actuated diaphragm valve according to the present invention having the configuration as described above will be described in detail with reference to the following drawings. Figure 2 is a front sectional view of a differential pressure actuated diaphragm valve according to the present invention.

The valve body 100 is provided with an inlet port 110 connected with a pipeline through which the fluid is introduced, an outlet port 120 through which the fluid introduced into the valve through the inlet port 110 flows out to the valve external pipe line, and the valve An upper end portion between the main body inlet 110 and the outlet 120 forms a path through which the diaphragm assembly to be described below is inserted and moved inside the valve body and is covered with a cover 200 that blocks the outside from the outside. do.

Drain holes 115 and 125 are formed at the lower side of the inlet 110 and the outlet 120, and the drain plugs blocking the drain holes 115 and 125 are opened to easily drain the residual fluid, thereby eliminating inconvenience caused by the residual flow during repair and cleaning. do.

Between the inlet 110 and the outlet 120 of the valve body 100 is formed integrally with the valve body 100 and the inner side has a circular passage shape is formed seat portion 130 to serve as a blocking frame, below When the diaphragm assembly disk 420 to be described is moved, the opening and closing of the flow path and the flow rate are determined according to the contact or distance with the seat 130.

The seat ring 135 is coupled to the inner circumferential surface of the seat part 130 so that the direct contact with the diaphragm assembly disk 420 is made precisely, and the valve body 100 is directly contacted with the disk 420. This prevents the shock from being directly transmitted to the valve body 100, and the life of the valve body 100 is improved, and the seat ring 135 at the end of the life due to the accumulation of fatigue is simply replaced.

The cover 200 coupled to the upper end of the valve body 100 blocks the upper end of the valve body 100 from the outside, and the cover 200 has a control hole 215 penetrated to the outside and the adjusting hole. Cover plug 250 for controlling the flow rate outside the valve as it moves up and down to block the 215 and the outside is provided.

The intermediate plate 220 is fitted to the valve body 100 and the cover 200 by sandwiching the diaphragm 410 of the diaphragm assembly between the cover 200 and the cover 210 and the intermediate plate ( 220 is provided between the grooves forming a space in which the diaphragm 410 is inserted and moved therein, and the cover 200 and the intermediate plate 220 are connected to each other at an outer portion surrounding the space, so that the diaphragm 410 is formed. The double chamber 230 is formed with the gap therebetween.

An auxiliary flow passage penetrating up and down is formed in the intermediate plate 220 to connect the valve body 100 and the cover 200 to a chamber in which the intermediate plate 220 is formed even when a sudden change in fluid flow occurs. As the pressure difference is eased and introduced, the diaphragm 410 is not subjected to a sudden impact.

When the auxiliary flow path formed in the intermediate plate 220 is blocked, the hydraulic fluid in the chamber formed by the intermediate plate 220 may be differently applied, so that when the fluid in which the main flow is made is oil such as light oil, gasoline, etc. Instead of air or water, the risk of fire can be reduced.

The dual chamber 230 structure also has another advantage of improving the lifespan by preventing the diaphragm 410 from being exposed on the main flow of the fluid, thereby preventing damage in the chamber due to foreign matter.

The pressure formed by the double chamber 230 is to adjust the flow rate by the interaction between the pressure of the inlet 110 side pressure and the oil outlet 120 side to achieve the basic operation of the differential pressure operated valve, Manual control is possible by adjusting the chamber 230 pressure using the cover plug 250 and the auxiliary pipe.

The diaphragm 410 is made of a special synthetic rubber nitrile-budadiene rubber (NBR) inserting a special fiber having excellent heat resistance and strength, and has excellent airtightness, durability, oil resistance, and strength, and the diaphragm 410 The diaphragm plate 415 in the upper and lower sides is tightly coupled, so that the movement of the diaphragm 410 is solidified into a plate shape instead of a membrane, thereby effectively and precisely interlocking with the structure connected to the lower side of the diaphragm 410.

The disk 420 is connected to the lower side of the diaphragm 410 to move up and down along the guide bushing 500 at the same displacement as the diaphragm 410 according to the pressure change in the chamfer. The flow path is blocked by contacting the seat ring 135 mounted on the valve body seat 130.

A disk-shaped groove is formed in the lower portion of the disk 420 so that the sheet disk 425 is inserted, and a disk washer is inserted into the lower portion of the sheet disk 425 to be bolted to the disk. The seat ring 135 and the seat disk 425 are actually in contact with each other.

The lower side of the disk 420 is coupled with a plug fault having a plug for forming a variety of flow rate and flow characteristics to form a flow having a variety of characteristics according to the plug shape of the fluid flowing through the lower side of the disk.

For example, a flat-plug without plugs provides a high flow rate with low headloss in on-off equipment, while a special plug with multiple V-shaped rakes is a standard plug of type V that provides smooth adjustment of flow characteristics at low flow rates. Provide the function.

The plug fault is easily coupled to the disk 420 to be easily installed and replaced in a suitable shape according to the site conditions where the valve is installed.

The lower end of the intermediate plate 220 is formed with a conduit protruding to be fitted to the inner peripheral surface of the upper end of the valve body 100, the center of the conduit is formed with a guide portion forming an entry frame into the valve body 100, cylindrical The outer circumferential surface of the guide bushing 500 is fixedly coupled to the inner circumferential surface of the guide portion.

The piston 430 is an axis connecting the diaphragm 410 and the disk 420 and is fitted to the inner circumferential surface of the guide bushing 500 to have the effect of being fixed to the valve body 100. As the piston moves in close contact with the inner circumferential surface of the guide bushing 500, the diaphragm 410 and the disk 420 connected to the piston 430 are stably moved upward and downward.

An air chamber 510 is provided on the inner circumferential surface of the guide bushing 500 to form a vacuum by a sudden movement of the piston, so that the disk 420 moves at a rapid movement downward of the diaphragm assembly 400. The slowing effect is obtained near the seat portion 130.

Therefore, the fatigue applied to the entire valve part is reduced by canceling the vibration and noise generated in the valve as well as the fatigue applied to the collision part such as the double chamber 230 and the seat part 130 according to the rapid flow and hydraulic pressure. It will improve the life.

The valve body auxiliary inlet pipe 310 and the valve body auxiliary outlet pipe 320 are formed at the inlet 110 and the outlet 120 of the valve body 100, and the valve body auxiliary is formed at the upper cover 210. The chamber auxiliary inlet pipe 330 is connected to the inlet pipe 310 and the valve body auxiliary outlet pipe 320 is connected to the fluid introduced into the chamber 230 through the chamber auxiliary inlet pipe 330 A chamber auxiliary outlet pipe 340 is formed to be discharged to the valve body auxiliary outlet pipe line 320 is connected to the auxiliary pipe paths to automatically control the flow of the fluid.

The valve body auxiliary inlet pipe 310 is provided with a mesh strainer 315 to prevent impurities contained in the fluid from flowing into the auxiliary pipe and the chamber, Figure 7 is a differential pressure actuated diaphragm according to the present invention Side sectional view showing a state where a strainer is installed inside the valve.

When the strainer 315 protrudes in a hemispherical shape and is exposed to the fluid flow and impurities are impaired and the performance of the valve is degraded, the strainer 315 is naturally cleaned by the fluid flow in the valve body 100, and thus cleaning is unnecessary. It also has the advantage of improving the service life by preventing damage.

The cover plug 250 provided on the cover 200 blocks the adjustment hole 215 from the outside, and is formed in a bolt shape to control the flow rate while moving up and down along the adjustment hole screw thread or to control the flow rate outside the flow valve. And control means for adjusting. Figure 3 is a differential pressure actuated diaphragm valve with a flow control shaft according to the present invention, Figure 4 is a differential pressure actuated diaphragm valve with a limit switch according to the present invention, Figure 5 is provided with a position indicator according to the present invention A differential pressure diaphragm valve is shown.

The cover plug 250 is provided with a flow regulating shaft 251 to adjust the flow regulating shaft 251 introduced into the chamber up and down to contact the lower end of the diaphragm assembly 400 with the flow regulating shaft 251. By controlling the displacement of the disk 420 is moved upward and downward to easily adjust the flow rate flowing to the outlet 120 side.

A limit switch 252 is provided on the cover plug 250 to generate a signal when the disk 420 moves upward by more than a predetermined time. When the disk 420 moves upward due to a rapid increase in flow rate, the cover plug 250 has a limit switch 252. It can be controlled by receiving a signal.

By providing a position indicator 253 on the cover plug 250, the displacement according to the movement of the disk 420 can be displayed to accurately grasp the flow rate. Easy to control

The operation principle of the differential pressure actuated diaphragm valve according to the present invention configured as described above will be described. Figure 6 is a front sectional view showing the operation principle of the differential pressure actuated diaphragm valve according to the present invention.

In the valve, the pressure P1 of the valve body inlet side, the pressure P2 of the outlet side, and the pressure P3 in the chamber interact with each other, and the inlet side pressure acting upward from the bottom of the disk 420. A chamber pressure P3 corresponding to an outlet pressure P2 and a diaphragm 410 area acting downward from the upper end of P1 and the disk 20 is in equilibrium.

(a) shows a state where the disc is completely open, (b) shows a state where the disc 420 is completely blocked, and (c) shows a state where the pressure is balanced. When the inlet pressure P1 is higher than the other forces, the disk 420 is fully open. When the inlet pressure P1 is lower than the other forces, the disk 420 is completely shut off, and the pressure P3 in the chamber. By adjusting the back of the three forces to equilibrate to control the position of the disk 420 to obtain the desired flow rate.

When the inlet side pressure P1 suddenly rises, the pressure acting upward of the disk 420 increases, but at the same time, the fluid flows into the valve body auxiliary inlet pipe 310 and passes through the chamber auxiliary inlet pipe 330. The pressure P3 flows into the chamber and rises in the chamber, and also flows toward the outlet 120 while the fluid is discharged to the valve body auxiliary outlet pipe 320 connected thereto through the chamber auxiliary outlet pipe 340. The pressure on the (110) side is lowered.

At this time, as the chamber auxiliary outlet pipe 340 has a narrower cross-sectional area than the chamber auxiliary inlet pipe 330, the pressure P3 in the chamber is increased, and when the chamber auxiliary outlet pipe 340 is blocked, the chamber auxiliary outlet pipe 340 acts downward. The pressure rises above the pressure acting upward of the disc, blocking the flow path.

According to the present invention having the above-described configuration, the double chamber structure and the air chamber are formed so that even when the flow rate or pressure change suddenly occurs, shock does not occur in the valve and vibration and noise are canceled to improve the life of the valve. have.

And, there is another effect that can be applied differently to the fluid in which the main flow is made and the working oil in the chamber.

In addition, there is another effect of improving the life by preventing damage to the chamber and diaphragm due to foreign matter.

In addition, there is another effect that the flow rate control and the hydraulic pressure measurement of the pipe are easy and the flow rate control is efficiently performed.

In addition, there is no effect due to the residual flow there is another effect that is easy to repair and cleaning operations.

Claims (7)

In the differential pressure-operated diaphragm valve having a valve body having an inlet and an outlet through which the fluid passes, a cover blocking the upper end of the valve body, and a diaphragm for controlling the flow rate, A valve body (100) having a seat portion (130) for opening and closing the flow path between the inlet port (110) and the outlet port (120), the main flow of the fluid being provided; A cover 200 which is provided with a cover plug 250 for blocking the control hole 215 and the control hole 215 from the outside and the flow rate is adjusted outside the valve; An auxiliary pipe path connecting the valve body 100 and the cover 200 is formed, and an intermediate diaphragm 220 is inserted between the valve body 100 and the cover by inserting a diaphragm 410 at an upper end thereof to form a double chamber structure. )and; A disk 420 interlocked with the diaphragm 410 and detachable from the seat 130 is provided, and a piston 430 for axially connecting the diaphragm 410 and the disk 420 is provided according to a hydraulic vehicle. A diaphragm assembly 400 to be moved; It is fixed to the intermediate plate 220 to guide the movement of the piston 430 on the inner circumferential surface, the air chamber 510 is provided with a vacuum formed by the high-speed movement of the piston 430 is provided with an impact due to rapid flow rate change A guide bushing 500 for alleviating the pressure; Differential pressure actuated diaphragm valve, comprising: a secondary inlet and outlet pipe is formed to be connected to the valve body (100) and the cover (200) to the secondary flow to control the main flow of the fluid. According to claim 1, wherein the valve body 100, Differential pressure actuated diaphragm valve, characterized in that the inlet 110 and the outlet 120, the drain hole 115, 125 is formed on the lower side. delete delete delete 4. The differential pressure actuated diaphragm valve according to claim 1, wherein the lower portion of the disk (420) is detachably coupled to a plug fault for forming various flow characteristics. The differential pressure actuated diaphragm valve according to claim 1, wherein a strainer (315) protrudes in a hemispherical shape at the inlet of the auxiliary inlet pipe (310) of the valve body so as to be naturally cleaned.

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