KR20060088621A - A system for fluid supply quantity automatic controlling using pressure change of suppliedfluid - Google Patents

Abstract

Disclosed is a fluid supply automatic control system using a change in pressure of a fluid to be supplied. In this automatic control system, the high pressure circuit section including the automatic switching valve and the high pressure reducing valve and the low pressure circuit section including the low pressure reducing valve actively open and close the opening and closing hole of the main valve according to the pressure change on the outlet side according to the amount of the fluid used. Since the supply amount of can be controlled mechanically and automatically, no separate electrical mechanical control means is required, and safety can be improved more by not using electricity, the failure rate can be lowered, and the manufacturing cost becomes cheaper. Various effects are provided.

Fluid, automatic control, system

Description

Fluid supply automatic control system using pressure change {A SYSTEM FOR FLUID SUPPLY QUANTITY AUTOMATIC CONTROLLING USING PRESSURE CHANGE OF SUPPLIEDFLUID}

1 is a schematic configuration diagram showing a fluid supply amount automatic control system according to the present invention.

FIG. 2 is a schematic configuration diagram showing a state in which a low pressure circuit unit of the automatic fluid supply amount control system shown in FIG. 1 is configured. FIG.

FIG. 3 is a schematic configuration diagram showing a state in which a high voltage circuit unit of the automatic fluid supply amount control system shown in FIG. 1 is configured.

<Description of the symbols for the main parts of the drawings>

100: main valve 110: opening and closing hole

120: inlet 130: outlet

140: control space 150: outlet space

160: diaphragm assembly 162: diaphragm

200: auxiliary flow path 220: orifice

300: low pressure circuit 310: low pressure flow path

320: low pressure reducing valve 400: high pressure circuit

410: high pressure circuit 420: automatic switching valve

430: high pressure reducing valve

The present invention relates to a fluid supply automatic control system using a pressure change, and more particularly to a fluid supply automatic control system that can automatically vary the supply of the fluid in accordance with the pressure of the fluid without electronic control.

Currently, most countries are suffering from water shortage due to the increase of water consumption along with the economic development rate, and have a policy of increasing water supply by developing water resources to meet water consumption. However, this development-oriented water supply policy has reached its limit due to problems such as finite water resources and environmental destruction.

In general, water consumption varies according to region and time, and the method of saving water resources by adjusting water supply (supply pressure) according to the trend of water consumption has emerged as a new theme of water resource management policy.

For example, during periods of high water use, such as daytime (especially morning, lunch, and evening), the water supply system must meet the water demand by supplying water at high pressure. At times, it is necessary to reduce the water pressure supplied from the water supply system.

If water is supplied at a high pressure in the water supply system even though the water consumption is low, the amount of water leaked from the water supply pipe or various valves may increase due to an imbalance between supply and consumption.

For example, boilers used in homes are designed to withstand a pressure of 2-4 kg / ㎠, but in practice, the pressure of the water supplied to each household is much higher than this, and if the situation is prolonged, It causes a problem that the parts of the boiler are damaged.

That is, high pressure is applied to the water supply system and its piping system or boiler, thereby increasing the load on the system or components, thereby increasing the risk of damage or breakage.

In order to solve this problem, a pilot pressure reducing valve that can adjust the water pressure of the supplied water has been applied to the water supply system. Such a pilot pressure reducing valve adjusts the desired water pressure by adjusting the pressure adjusting screw provided therein. The pilot pressure reducing valve has a function of reducing the pressure to a predetermined constant pressure at all times regardless of the amount of water used at the outlet side of the valve.

Therefore, in order to use the pilot pressure reducing valve according to the related art as described above, there was an inconvenience in that the operator had to control the pressure reducing pressure by adjusting the pressure adjusting screw one by one according to the time of use of the water. In particular, even if the pressure is set properly, once the pressure is set, water is always supplied at a constant water pressure regardless of the amount of water used at the outlet side until it is manually readjusted. The pressure of the was increased, there was a problem of damage or breakage as described above.

As an alternative to the above, a large-capacity pressure reducing valve and a small-capacity pressure reducing valve are installed in parallel in the water supply system, and the set pressures of the pressure reducing valves are changed in parallel to use a large-capacity pressure reducing valve during the day and a small capacity at night. A method of controlling the water pressure by using a pressure reducing valve of A was proposed, but in the case of the water system of this structure, it was inconvenient to alternate between a large-capacity pressure reducing valve and a small capacity reducing valve at a predetermined time.

On the other hand, in recent years, the amount of water used in each time zone is stored in the memory of the controller and then microcomputer automatically controls the solenoid valves for selectively controlling each of the large-capacity pressure reducing valves and the small-capacity pressure reducing valves. This could be somewhat resolved. However, the water supply system having such an electronic control structure has a problem in that the control unit is exposed to moisture and malfunctions, and the user does not use the water at a certain time period such as the data already input. It was difficult to cure.

That is, since the water supply system is installed in the space formed in the ground, the control unit is always exposed by rainwater, moisture, leakage, etc. flowing into the space, thereby inherent the risk of leakage and malfunction. In addition, it was difficult to actively cope with sudden changes in water usage because the microcomputer automatically regulated the amount of water supplied based on the data already input.

 The present invention has been made in order to solve the problems of the prior art as described above, the technical problem of the present invention is to open and close the opening and closing hole of the main valve actively (automatically) fluid according to the pressure change of the outlet side according to the amount of fluid used An object of the present invention is to provide an automatic control system for supplying mechanical fluid supply which does not use electricity while automatically controlling supply.

The present invention for solving the technical problem as described above has an inlet and an outlet connected in series with the main pipe to which the fluid is supplied, and provided with a diaphragm assembly to separate the control space and the outlet space, the pressure and outlet side in the control space A main valve for selectively opening and closing the opening and closing hole between the inlet and the outlet by the diaphragm assembly which is lifted / lowered according to the pressure difference of the;

An auxiliary flow path formed to communicate the inlet and the control space, and having an orifice installed therein for controlling the flow of the fluid;

A low pressure flow path formed to communicate the auxiliary flow path between the orifice and the control space and the outlet, and installed in the low pressure flow path so that the pressure in the control space is lowered when the pressure at the outlet side is lower than a predetermined pressure so that the diaphragm assembly is pressurized. A low pressure circuit unit having a low pressure reducing valve for opening and closing the hole while ascending toward the lowered control space;

A high pressure flow passage configured to communicate the control space with the outlet, an automatic conversion valve installed in the high pressure flow passage to open when the pressure in the control space is lowered below a predetermined pressure by activation of the low pressure circuit portion, and the automatic conversion valve is opened. And a high pressure circuit unit having a high pressure reduction valve to open the opening and closing hole to increase the fluid supply amount while the diaphragm assembly is opened to lower the pressure of the control space when the pressure is lowered. It provides a fluid supply automatic control system using a pressure change.

Such a system is designed to open and close the control valve pressure of the main valve by selectively opening and closing the low pressure reducing valve of the low pressure circuit part, the automatic switching valve of the high pressure circuit part, and the high pressure reducing valve according to the pressure change on the outlet side according to the user using the fluid (water). Since the diaphragm assembly opens and closes the opening and closing hole according to the pressure change in the adjusting space, the supply amount of the fluid can be adjusted immediately according to the amount of the fluid used, and stable supply of fluid can be controlled by not using electricity. It becomes possible. In addition, since the supply amount is immediately adjusted according to the amount of the fluid used, the flow rate control is accurately performed, and there is no need to unnecessarily increase the pressure of the supplied fluid.

Preferred embodiments of the present invention as described above in detail based on the accompanying drawings as follows.

1 is a schematic configuration diagram showing a fluid supply automatic control system according to the present invention.

As shown in FIG. 1, the automatic fluid supply control system according to the present invention includes a main valve 100 having an inlet 120 and an outlet 130 connected in series with a main pipe, an inlet 120, and a main valve ( Auxiliary flow path 200 for communicating the control space 140 of the 100 and, when the pressure on the outlet 130 side is lowered below a predetermined pressure is activated to open the opening and closing hole 110 of the main valve 100 Low voltage circuit unit 300 to be activated, and the high pressure circuit unit for the diaphragm assembly 160 to open the opening and closing hole 110 is further activated when the pressure of the control space 140 is lowered by the activation of the low pressure circuit unit 300. It consists of 400.

This will be described in more detail below.

As shown in FIG. 1, the main valve 100 includes an inlet port 120 and an outlet port 130 connected in series with a main pipe to which a fluid is supplied. The opening and closing hole 110 formed between the inlet 120 and the outlet 130 is opened and closed by a seat of the diaphragm assembly 160, the upper portion of the diaphragm assembly 160 is located in the control space 140, The diaphragm separates the adjusting space 140 and the outlet space 150 (the space formed on the outlet 130 side). The diaphragm assembly 160 is lowered when the pressure in the control space 140 is higher than the pressure on the outlet space 150 to close the opening and closing hole 110, the pressure in the control space 140 is the outlet space 150 When lower than the pressure of the side to rise and open the opening and closing hole (110). The main valve 100 of this structure is more clearly shown in the accompanying drawings.

The auxiliary flow path 200 is for communicating the inlet 120 side of the main valve 100 with the control space 140, and an orifice for adjusting the amount of fluid passing through the auxiliary flow path 200 in the middle thereof. 220 is installed. The opening and closing speed of the opening and closing hole 110 may be adjusted by the orifice 220.

The low pressure circuit unit 300 communicates with the control space 140 side and the outlet 130 side when the pressure on the outlet 130 side is a set pressure (for example, about 5kg / ㎠) control space 140 To lower the pressure of the diaphragm assembly 160 is to open and close the opening 110, the auxiliary flow path 200 and the outlet 130 between the orifice 220 and the control space 140 is The low pressure passage 310 and the low pressure passage 310 formed to communicate with each other, the diaphragm assembly 160 is opened so that the pressure in the control space 140 is lowered when the pressure on the outlet 130 side is lowered below a certain pressure. ) Is made of a low pressure reducing valve 320 to open the opening and closing hole 110 while rising to the control space 140 is lowered in pressure.

As shown in FIG. 1, the low pressure reducing valve 320 is connected in series with the low pressure passage 310 and has a low pressure inlet 322 facing the control space 160 and a low pressure outlet facing the outlet 130. 321 and a low pressure inlet 322 and a low pressure outlet 321 to connect the flow path 323, the inside is divided into the low pressure outlet 321 side and the low pressure control space 327 is the low pressure outlet The low pressure valve body 328 and the low pressure control space 327 communicate with each other by the low pressure acting hole 325, and the low pressure seat is lowered when the pressure at the low pressure outlet port 321 is lowered below a predetermined pressure. 324 consists of a low pressure diaphragm assembly 326 that is operative to open the flow path.

Therefore, when the pressure on the low pressure outlet 321 side (pressure on the outlet 130 side of the main valve) is lower than or equal to the set value, the low pressure diaphragm assembly 326 descends to open the oil passage 323 and ascends when the pressure exceeds the set value. 323). At this time, the operating pressure of the low pressure reduction valve 320 may be set differently depending on the use and installation area.

As shown in FIG. 1, the high pressure circuit unit 400 may increase the supply of fluid due to the activation of the low pressure circuit unit 300, thereby lowering the pressure of the control space 140 due to a lower pressure at the outlet 130. When activated to allow the diaphragm assembly 160 to open and close the opening 110 more. The high pressure circuit unit 400 is a high pressure passage 410 formed to communicate the control space 140 and the outlet 130, the high pressure passage 410 is installed in the control space by the activation of the low pressure circuit unit 300 The automatic conversion valve 420 is opened when the pressure in the 140 is lower than the predetermined pressure, and the diaphragm assembly 160 is opened to further lower the pressure in the control space 140 when the automatic conversion valve 420 is opened. ) Is made up of a high-pressure circuit unit 400 having a high-pressure pressure reducing valve 430 to increase the fluid supply by further opening the opening and closing hole 110 while rising to the control space 140, the pressure is lower.

 At this time, the high pressure reducing valve 430 is connected to the high pressure passage 410 in series as shown in Figure 1, the high pressure inlet 432 and outlet 130 toward the control space 140 side high pressure outlet 130 side It is provided with a 431, the high pressure inlet 432 and the high pressure outlet 431 has a flow path 433, the inside is divided into the high pressure outlet 431 and the high pressure control space (437) and the high pressure outlet The high pressure seat 431 and the high pressure control space 437 are lowered when the pressure of the high pressure valve body 438 communicating with each other by the high pressure operation hole 435 and the pressure of the high pressure outlet 431 is lowered below a predetermined pressure. 434 is comprised of a high pressure diaphragm assembly 436 that is operative to open the flow path 433.

In addition, the automatic conversion valve 420 is connected in series with the high pressure passage 410 and has a conversion inlet 421 toward the control space 140 side and the conversion outlet 422 toward the high pressure reduction valve 430 side, And a flow path 424 connecting the conversion inlet 421 and the conversion outlet 422, the interior of which is divided into the conversion inlet 421 and the conversion control space 426, and the conversion inlet 421 and the conversion. The control space 426 is lowered when the pressure of the conversion valve body 428 and the conversion inlet 421 side is communicated with each other by the conversion action hole 425 is lower than a predetermined pressure to the conversion sheet 423 flow path A conversion diaphragm assembly 427 that is operative to open 424.

On the other hand, the auxiliary flow passage 200, the low pressure passage 310 and the high pressure passage 410 is provided with a pressure gauge 500 for displaying the pressure to the outside, respectively.

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

First, the automatic control system does not change the pressure in the tube when the fluid consumption of the outlet 130 side is no longer. At this time, since the pressure change inside the control space 140 does not occur, as shown in FIG. 1, the seat 161 of the diaphragm assembly 160 maintains a state in which the opening and closing hole 110 is closed.

Referring to the process of operating the low voltage circuit unit 300 in this state is as follows.

First, when the fluid is consumed at the outlet 130 side, the pressure at the outlet 130 is gradually lowered. If this situation persists and the outlet 130 side becomes lower than the set value (for example, 4 kg / cm 2), the low pressure diaphragm assembly 326 of the low pressure reduction valve 320 moves to the lower portion of the low pressure control space 327. As a result, the low pressure sheet 324 opens the flow path 323. At this time, since the low pressure adjusting space 327 and the low pressure outlet 321 are communicated by the low pressure working hole 325, the diaphragm of the low pressure diaphragm assembly 326 is moved downward (to the low pressure working hole side).

When the flow path 323 of the low pressure reduction valve 320 is opened, the outlet 130 and the control space 140 communicate with each other by the low pressure flow passage 310 to control the fluid and the control space 140 on the inlet 120 side. Of the fluid flows to the outlet 130, the pressure is lowered, thereby lowering the pressure in the control space 140. At this time, by controlling the opening speed adjusting device (shown in the figure) having the same function as the orifice 220 or the orifice 220 to control the amount or speed of the fluid flowing to the outlet 130 side of the control space 140 side. Can be.

Subsequently, when the fluid in the control space 140 flows to the outlet 130 and the pressure in the control space 140 decreases, the diaphragm 162 rises to the control space 140 and eventually the seat 161. Will open and close the opening (110).

At this time, the opening degree of the opening and closing hole 110 depends on the pressure inside the control space 140 affected by the pressure drop on the outlet 130 side.

Meanwhile, hereinafter, the process of operating the high voltage circuit unit 400 will be described.

As described above, when the low pressure circuit unit 300 is activated and the opening / closing hole 110 is opened and the fluid at the inlet 120 is supplied to the outlet 130, when the consumer uses more fluid (water), the outlet is The pressure on the side 130 becomes even lower. For example, it will be lower than 4 kg / cm 2.

By this action, the pressure in the control space 140 is lowered to the set value (for example, 2.5kg / ㎠, where the pressure of the control space is 2.5kg / ㎠ means that the pressure on the outlet side is 2.5kg / ㎠) The automatic conversion valve 420 set to open to the set pressure at the ground is opened, and the high pressure reduction valve 430 is opened.

That is, when the pressure on the outlet 130 is lower than the set value, the high pressure diaphragm assembly 436 of the high pressure regulating space 437 of the high pressure reducing valve 430 is lowered to open the flow path 433. Then, since the pressure in the adjusting space 140 is lower than the set value, the conversion diaphragm assembly 427 of the automatic conversion valve 420 is lowered so that the conversion sheet 423 opens the flow path 424. As a result, the outlet 130 and the control space 140 communicate with each other so that the fluid inside the control space 140 flows toward the outlet 130 through the high-pressure flow passage 410 so that the pressure inside the control space 140 becomes even lower. As a result, the diaphragm assembly 160 is further raised to open and close the opening and closing hole 110 more than when the low voltage circuit unit 300 is activated.

In this operation, a larger amount of fluid may be supplied to the outlet 130 through the opening and closing hole 110 at the inlet 120 side.

As such, the high pressure circuit unit 400 and the low pressure circuit unit 300 operate by themselves to control the supply of the fluid according to the pressure change according to the amount of use of the fluid, so that the supply pressure does not need to be unnecessarily increased. In the following, breakage of devices such as various pipes and boilers can be minimized.

Fluid supply amount automatic control system using the pressure change according to the present invention, the high pressure circuit section and the low pressure circuit section automatically opens and closes the opening and closing hole of the main valve in accordance with the pressure change of the outlet side according to the amount of fluid used to automatically supply the fluid supply amount. Since it is possible to control a separate electrical mechanical control means is unnecessary, the safety can be further improved by not using electricity, the failure rate can be lowered, and the production cost is provided with various effects.

While the invention has been shown and described with respect to specific preferred embodiments thereof, the invention is not limited to the embodiments described above, and is typically used in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge of the world can make many variations.

Claims (3)

A diaphragm assembly having an inlet and an outlet connected in series with the main pipe to which the fluid is supplied, and having a diaphragm assembly separating the control space and the outlet space into a diaphragm assembly which is lifted and lowered according to the pressure difference between the pressure in the control space and the outlet side. A main valve for selectively opening and closing the opening and closing hole between the inlet and the outlet; An auxiliary flow path formed to communicate the inlet and the control space, and having an orifice installed therein for controlling the flow of the fluid; A low pressure flow path formed to communicate the auxiliary flow path between the orifice and the control space and the outlet, and installed in the low pressure flow path so that the pressure in the control space is lowered when the pressure at the outlet side is lower than a predetermined pressure so that the diaphragm assembly is pressurized. A low pressure circuit unit having a low pressure reducing valve for opening and closing the hole while ascending toward the lowered control space; A high pressure flow passage configured to communicate the control space with the outlet, an automatic conversion valve installed in the high pressure flow passage to open when the pressure in the control space is lowered below a predetermined pressure by activation of the low pressure circuit portion, and the automatic conversion valve is opened. A high pressure circuit unit having a high pressure reduction valve which is opened to lower the pressure of the control space so that the diaphragm assembly rises to the control space of which the pressure is lower and further opens and closes the opening to increase the fluid supply; Fluid supply amount automatic control system using a pressure change characterized in that it comprises a. The apparatus of claim 1, wherein the main valve comprises: a body having an inlet and an outlet and opening and closing holes communicating the inlet and outlet; And dividing the inside of the body into a control space and an outlet space, and when the pressure of the control space is lower than the outlet space, the seat rises to open the opening and closing hole, and when the pressure of the control space is higher than the outlet space, the seat is lowered. And a diaphragm assembly operable to close the opening and closing hole, The low pressure reducing valve is connected in series with the low pressure flow path and has a low pressure inlet toward the control space side and a low pressure outlet toward the outlet side, and has a flow path connecting the low pressure inlet and the low pressure outlet, the inside of the low pressure outlet and low pressure control A low pressure valve body divided into spaces and communicating with each other by a low pressure working hole; And a low pressure diaphragm assembly which is lowered when the pressure at the low pressure outlet side is lowered below a predetermined pressure to operate the low pressure sheet to open the flow path. The high pressure reducing valve is connected in series with the high pressure flow path and has a high pressure inlet toward the control space side and a high pressure outlet toward the outlet side, and has a flow path connecting the high pressure inlet and the high pressure outlet, and the inside of the high pressure outlet and the high pressure control High pressure valve body is divided into a space and communicated with each other by a high pressure operation hole; And a high pressure diaphragm assembly which is lowered when the pressure at the high pressure outlet side is lowered below a predetermined pressure to operate the high pressure sheet to open the flow path. The automatic conversion valve is connected in series with the high pressure flow path and has a conversion inlet toward the control space side and a conversion outlet toward the high pressure reduction valve side, and has a flow path connecting the conversion inlet and the conversion outlet, the inside of the conversion A conversion valve body divided into an inlet and a conversion control space and communicating with each other by a conversion action hole; And a converting diaphragm assembly which is lowered when the pressure at the conversion inlet side drops below a predetermined pressure to operate the conversion sheet to open the flow path. The fluid supply amount automatic control system using pressure change according to claim 1 or 2, wherein a pressure gauge is provided in the auxiliary flow passage, the low pressure flow passage, and the high pressure flow passage.

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