KR20060101840A - Shut-off valve and pressure reducing valve - Google Patents

Abstract

The present invention can perform the role of two valves simultaneously with a single valve by adding, technically combining, configuring and integrating components into a pilot solenoid valve, which is a conventional intermittent valve, so that the discharge pressure can be controlled under pressure. The first pilot valve and the first operator's outlet, the second pilot valve and the second operator's outlet are arranged to be in series in a flow path. And the main valve to be controlled in common can be used as an intermittent valve when the first pilot valve acts, and acts as a decompression valve when the second pilot valve acts. It provides a valve to solve the water hammer (water hammer), which is a disadvantage of the pilot solenoid valve, while simultaneously performing the action of.

Solenoid Plunger Pilot Valve Diaphragm Bellows Stem Pressure Spring

Description

Pressure reducing valve combined with intermittent valve {shut-off valve and pressure reducing valve}

1 is a cross-sectional view of the internal structure state before the pipe connection in the pressure reducing valve of the present invention.

Figure 2 is a cross-sectional view of the operating state when the voltage is applied to the solenoid during the fluid supply in the pressure reducing valve of the present invention,

3 is a cross-sectional view of an operation state when the valve exit is blocked in the state of FIG. 2;

4 is a cross-sectional view of a second pilot valve accommodating chamber provided in a pressure plate upper pressure chamber according to another embodiment of the present invention;

4A is a cross-sectional view taken along the line A-A 'of FIG.

5 is a partial cross-sectional view of the discharge pressure sensing chamber formed by bellows in another embodiment of the present invention.

(Description of the major signs used in the drawings)

17: protrusion 171: stem guide hole

172: discharge pressure sensing water inlet 31: first operating water outlet

41: first pilot valve 42: second pilot valve

421 stem 431 pipeline

432: flow control valve 52: extension portion

53: second pilot valve storage compartment cover 531: second operation water outlet

54: second pilot valve storage chamber 60: discharge pressure detection chamber

61: pressure sensing diaphragm 72: pressure adjusting screw

73: pressure regulating spring 80: pressure sensing bellows

The present invention relates to an intermittent valve combined pressure reducing valve. In general, Valbraham is installed between pipes to control the flow of fluid (water, oil, air, etc.). Among them, the pressure reducing valve is a pressure control valve that allows the pressure to be properly reduced to use the pressure of the valve outlet (discharge pressure). In the present invention, this is referred to as a pressure reducing valve. Oil, air, etc.) will be expressed as water.

Of course, there have been decompression valves in the past, and in order to adjust the outlet pressure to the desired pressure regardless of the inlet hydraulic pressure change, the main valve opening of the decompression valve should be reduced. When it is lowered, it is possible to maintain the constant pressure by increasing the main valve opening degree. This requires an action characteristic to cause the pressure change on the outlet side to adjust the opening degree of the main valve of the decompression valve.

Of course, in the conventional decompression valve, the main valve of the decompression valve is opened and closed using this operating characteristic. However, in the general decompression valve, a larger valve is operated by the pressure at the outlet side to open and close the main valve in addition to the main valve that opens and closes the flow of water. Since the main valve is opened and closed, the structure is complicated and requires many parts, and it has a drawback that it is not smooth and costly, and in order to cut off or resupply the water supply to the pressure reducing valve. A separate intermittent valve must be additionally provided and installed on the pipe, while water hammer (water hammer) also exists as a problem to be solved in the electric intermittent valve, which is very inconvenient and disadvantageous in use or economically.

Accordingly, the present invention has been made to solve such a problem, by adding a new component to the conventional solenoid valve pilot solenoid valve to perform the operation as a pressure reducing valve, by technically combining and configuring the intermittent valve with one valve In order to be able to perform the role of and a decompression valve at the same time,

By operating the first pilot valve with the interruption of the voltage applied to the solenoid, the main valve is intermittently acted as an intermittent valve, while the sensing diaphragm serving as the discharge pressure sensor causes the second pilot valve to be operated with a small force. By operating it, it acts as a decompression valve that increases or decreases the opening of the main valve by the pressure at the inlet side. The structure is simple, the production cost is low, and the operation is assured, while the water hammer (water hammer) does not occur. It is aimed at providing stools

As shown in FIG. 1, a part of the present invention has a conventional pilot solenoid valve structure, a valve body 10 having a valve inlet 11 and a valve outlet 12 and the valve body 10. There is a toilet seat 13 which is the start of the discharge port therein, the diaphragm 20 is in close contact with the toilet seat 13 and serves as a main valve, and water for achieving main valve opening and closing operation on one side of the diaphragm 20. There is an operation water inlet 21 which flows in.

In addition, there is a reinforcement plate 30 on the diaphragm 20 to prevent deformation of the diaphragm 20 when the main valve is closed, and the first opening and closing of the diaphragm 20 by the first pilot valve 41 is performed. There is an operation water outlet 31, and the diaphragm 20 is seated 13 by sealingly fixing the outer periphery 22 of the diaphragm 20 on the upper outer periphery 14 of the lower valve body 10 of the pressure reducing valve. There is a valve body cover 16 for forming a pressure chamber 15 for close contact and sealing. The plunger accommodating chamber 43 is formed with a partition wall 161 on the cover 16 to form a spring 44 and a first chamber. The plunger 40 having the pilot valve 41 is accommodated and the solenoid 45 is provided outside the partition 161. Thus, the structure of the conventional pilot solenoid valve is as follows. Not shown)

Referring now to the invention of the invention,

The present invention is connected to one side of the plunger storage chamber 43 and the pressure chamber 15 to the pipe 431, but the flow control valve 432, such as a ball valve that can control the flow rate in a small amount is connected to the pipe The reinforcing plate 30 is provided with an extended portion 52 of a cylindrical shape 50 having a plurality of radial ribs 51 provided downward, and a second operation water outlet 531 at the center under the extended portion. And cover the outer compartment around the outer periphery of the outer periphery with an "O" ring, etc., and secure it to the extension by means of a shovel or strong adhesive, etc. In forming the storage chamber, a second pilot valve 42 fixed to a stem 421 of a predetermined length (but sufficient strength and corrosion resistance) is accommodated. It is inserted into the stem guide hole 171 to be described later through the operation water outlet 531 and the storage chamber 54 Between the part and the second pilot valves 42, thin elastic spring 422 there is interposed, and plays the role to push the second pilot valves the outlet toward be second operation.

In the lower center portion of the inside of the main body of the valve, a protrusion 17 through which a stem guide hole 171 is formed so that the second pilot valve 42 and the fixed stem 421 can freely slide up and down. A discharge pressure sensing inlet (172. or less, expressed as a sensing water inlet) which is connected to the discharge pressure sensing chamber (hereinafter referred to as a pressure sensing chamber) is formed at the bottom of the protrusion.

On the other hand, under the outer central portion of the valve body 10, the pressure sensing chamber 60 is formed by compressing and fixing the outer circumferential edge 611 of the discharge pressure sensing diaphragm (hereinafter referred to as a sensing diaphragm) by the sealing fixing member 70. ) And insert the discharge pressure adjusting screw (referred to as 72 or below adjusting screw) of the external thread to the inner diameter female screw 71 of the fixing member 70, and the discharge pressure adjusting spring between the adjusting screw and the sensing diaphragm 61. (73, hereinafter referred to as control spring) is interposed.

Reference numeral 301 in Figure 4 is a dotted line (not shown other than the main figure) for displaying the normal reinforcing plate, a and b will be described in the description of the operation described below, 80 of Figure 5 is a bellows.

According to the present invention configured as described above, as shown in FIG. 2, water of high pressure coming from the valve inlet 11 like the conventional pilot solenoid valve lifts the main valve diaphragm 20 from the toilet seat 13 (dia). It flows in between them and discharges to the valve | bulb outlet 12 through the space between the outer periphery of the extension part 52, and the toilet seat 13 as shown by the dotted arrow mark below the pram 20. FIG.

In the intermittent valve combined pressure reducing valve of the present invention, a part of the water coming from the valve inlet 11 in this process is introduced into the pressure chamber 15 through the operation water inlet 21 on one side of the diaphragm 20 to supply the first operation. After passing through the outlet 31, it passes through the second operation water outlet 531 and flows out to the outlet side like a conventional pilot solenoid valve, and some water of the discharged process is passed through the sensing water inlet 172. In other words, it is introduced into the upper portion of the sensing diaphragm 61, which serves as a discharge pressure sensor.

In this state, the water is continuously supplied from the valve inlet 11 and the water is continuously discharged unless the valve outlet is blocked. In this process, a large amount of water of high pressure comes in due to the pressure fluctuation of the valve inlet side, or the valve outlet 12 When the pressure on the discharge side is increased by reducing the discharge on the side, the pressure of the water entering the pressure sensing chamber 60 through the detection water inlet 172 also increases, so that the detection diaphragm 61 supporting the lower part of the stem 421 is supported. ) Is pressed down and the second pilot valve 42 is lowered by the elastic spring 422 to block the second operation water outlet 531, there is no place for the water in the pressure chamber to escape. The pressure of the pressure chamber 15 is increased by the water coming from the operation water inlet 21 on one side of the valve diaphragm 20, thereby pressing down the main valve diaphragm 20 (stiffening plate 30). Dotted line above As shown by the arrow marks, since the diaphragm 20 acts to narrow the opening degree between the toilet seat 13, the flow of water is reduced, and the discharge-side pressure is reduced again.

Thus, when the pressure on the sensing diaphragm 61 decreases again, the sensing diaphragm 61 is lifted by the elasticity of the adjustment spring 73. When the stem 421 is pushed upward, the second pilot valve fixed with the stem ( 42 opens the second operation water outlet 531 again, and when the water in the pressure chamber 15 flows out through the second operation water outlet 531, the pressure in the pressure chamber 15 is lowered. 20 is lifted again by the pressure of the water coming from the valve inlet 11, so that a lot of water flows again.

Eventually, this process is repeated, while water is continuously supplied from the valve inlet and the valve outlet is open, the discharge of water is continued while maintaining a constant discharge pressure regardless of the pressure change of the incoming water.

In some cases, the use of water is not necessary, and if the valve outlet 12 is blocked (as shown in FIG. 3), the discharge pressure increases in the blocking process, and thus a high pressure is applied to the sensing diaphragm 61. As soon as the sensing diaphragm 61 is lowered to the ground and the second pilot valve 42 is lowered by the elastic spring 422, the second operation water outlet 531 is completely blocked, so that the pressure chamber 15 As the pressure increases, the main valve diaphragm 20 closes and closes to the toilet seat 13, so that the water coming from the valve inlet 11 is completely blocked, so that the pressure at the valve outlet side at which the flow stops. It is no longer high and stays constant.

On the other hand, if the valve outlet is opened again to use water, the discharge pressure is lowered, and thus the pressure applied to the sensing diaphragm 61 is also lowered. As a result, the sensing diaphragm 61 is resilient to the adjustment spring 73. When the uphill pushes the stem 421, the second pilot valve 42 fixed thereto opens the second operation water outlet 531. The main valve diaphragm 20 is lifted as described above, and the water flows again. Begins.

As such, the main valve diaphragm 20 opens and closes, so that the reinforcement plate 30 and the extension part 52 also move up and down. At this time, there is a rib 51 formed in the extension part. To help.

Referring to the method of adjusting the discharge pressure (see Fig. 2), by turning the adjusting screw 72 to the left and right, the elasticity that pushes the sensing diaphragm 61, which acts as the discharge pressure sensor, rises upward. For example, if the elasticity is less applied, the sensing diaphragm 61 is lowered even at a low pressure (that is, a low discharge pressure) applied to the sensing diaphragm 61 so that the second pilot valve 42 is second. It means that the operation water outlet 531 is blocked, thereby acting to close the main valve diaphragm 20 at a lower pressure than before adjustment so that the discharge pressure is adjusted to a low state as can be seen from the above description. I can see

Of course, if the contrary control is to occur in the opposite direction of course it will be understood that the above is to act as a decompression valve which is part of the object of the present invention.

Now, when the operation state as an intermittent valve is another object of the present invention, when the applied voltage of the solenoid 45 is cut off as shown in FIG. 1 in FIG. 2 (solenoid lead wire not shown), the solenoid loses its magnetic force. When the plunger 40 is lowered by the spring 44 of the plunger storage chamber 43 and the first pilot valve 41 fixed thereto blocks the first operation water outlet 31, the water in the pressure chamber 15 is reduced. Since there is no place to exit, the pressure in the pressure chamber is increased due to the water entering the operation water inlet 21, and the flow of water is blocked by acting as a normal pilot solenoid valve.

At this time, the clearance between the plunger 40 and the partition wall 161 is as small as the plunger 40 can move up and down in the storage chamber 43. The bar also has a first pilot valve (41) due to the action of the pilot solenoid valve. When the first operation water outlet 31 is slowly opened and closed, the main valve diaphragm 20 is also gradually opened and closed to prevent water hammer, which is when the plunger 40 is raised and lowered. This is possible because the plunger 40 gradually lifts and lowers due to the temporary increase or negative pressure generated in the step 2). It is also possible to adjust the opening and closing speed of the main valve diaphragm 20 by controlling the lifting speed of the plunger 40 by controlling the magnitude of the boost or the negative pressure generation by adjusting.

As such, the first pilot valve completely blocks the first operator's water outlet or the second pilot valve 42 as shown in FIG. If the 531 is completely blocked, the intermittent pressure reducing valve for the intermittent valve of the present invention is blocked. This is because the water of the pressure chamber 15 entering the manipulation water inlet 21 is discharged to the first manipulation outlet 31, and then 2 When a series of processes of exiting the operation water outlet 531 are in series in a flow path, and the main valve diaphragm 20 is used as an intermittent valve or as a decompression valve, It is possible because it can be used in common, it can be seen that the action as an intermittent valve, which is another object of the present invention by selecting the voltage applied to the solenoid (45).

FIG. 4 is a view of another embodiment of the present invention. In forming the second pilot valve accommodating chamber 54, an extension 52 of the reinforcement plate 30 is provided under a reinforcement plate. Rather, it is formed in the pressure chamber 15 on the reinforcing plate, and in the structure having the storage compartment cover 53 above the storage compartment 54, the central hole a of the storage compartment cover serves as the first operation water outlet. (Acts with the first pilot valve 41), and the center hole b of the reinforcing plate 30 serves as the second operation water outlet (i.e., with the second pilot valve 42). It should be noted that, since those skilled in the art can easily understand the operation thereof, the description of its operation will be replaced with the above description of the operation.

In addition, as described above, the operation description and the embodiments of FIGS. 1, 2, 3, and 4 will be described. If necessary, the plunger 40, the first pilot valve 41, and the solenoid 45 may be partially removed. If it is not used, it can be easily used by a pressure reducing valve and can be easily understood by those skilled in the art.

1, 2, 3, and 4 illustrate a method of forming a pressure sensing chamber 60 by using a diaphragm to sense the discharge pressure, but instead of diaphragm, pressurize the bellows 80 as shown in FIG. 5. It is also possible to form a sensing chamber 60 so as to sense the discharge pressure, the formation of the pressure sensing chamber 60 is not limited to the above-described methods and materials.

1, 2, 3, and 4 illustrate the adjustment of the discharge pressure by adjusting the elasticity of the adjustment spring 73 by turning the adjustment screw 72, but it is sometimes necessary to adjust the discharge pressure of the pressure reducing valve. If there is, by way of adjusting the elasticity of the adjustment spring 73 in a linear motion by means of hydraulic, pneumatic, etc., instead of turning the adjustment screw, it is also possible to adjust the discharge pressure of the pressure reducing valve from time to time, the above-described method They differ only in their implementation, but the technical idea is the same.

The present invention, which has the same configuration and function as described above, is technically combined and constituted by adding components to be able to act as a pressure reducing valve to a conventional solenoid valve pilot solenoid valve. It is effective to provide one-valve two-role valve (intermittent and decompressed) which is easy to use because it does not generate water hammer.

Claims (4)

Valve body 10, main valve diaphragm 20, stiffening plate 30, the first pilot valve 41, plunger 40, elastic spring 44, valve cover 16, and solenoid 45 In a conventional pilot solenoid valve equipped with A plunger storage chamber 43 and a pressure chamber 15 are connected to each other by a conduit 431 to connect a flow control valve 432 on the conduit, and a plurality of radial ribs 51 under the reinforcing plate 30. ) Is provided with an extension portion 52 of the cylindrical shape (50) provided in the lower portion of the extension portion, the storage compartment cover 53 with a second operation water outlet 531 in the center of the extension portion 52 In the airtight and fixed form of the second pilot valve storage chamber 54, the storage chamber 54 accommodates the second pilot valve 42 fixed to the stem 421, but includes the storage chamber 54. An elastic spring 422 is interposed between the upper part and the second pilot valve 42, and the stem is inserted into the stem guide hole 171 through the second operator outlet 531. In the central part of the valve body 10, a protrusion 17 through which the stem guide hole 171 is drilled is formed, and a pressure sensing water inlet 172 through the discharge pressure sensing chamber 60 is drilled at the bottom of the protrusion, The outer peripheral portion 611 of the discharge pressure detecting diaphragm 61 is compressed and sealed under the outer main body of the valve body by a hermetic fixing member 70 to form a discharge pressure sensing chamber 60 and an internal diameter side female screw of the fixing member ( 71) is inserted into the discharge pressure adjusting screw 72 of the external thread, but between the discharge pressure adjusting screw and the discharge pressure sensing diaphragm 61, a pressure regulating spring (73) interposed between the pressure regulating spring. The method of claim 1, An intermittent pressure reducing valve for forming an discharge pressure sensing chamber 60 by sealing and fixing a diaphragm, bellows, and the like. The method of claim 1, In the formation of the second pilot valve accommodating chamber (54), an intermittent valve combined pressure reducing valve may be formed alternatively under or on the reinforcing plate (30). The method according to claim 2 or 3, A pressure reducing valve without using the first pilot valve (41), plunger (40), solenoid (45), or the like.

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