KR200414115Y1 - Smart Valve System and Control Method for Water Hammering using it - Google Patents

Abstract

The present invention relates to a water hammer linear control valve, the water hammer linear control valve according to the present invention is installed on the pump station discharge side or the landing well inlet side opening and closing valve opening and closing by the rotation of the opening and closing plate; A pressure sensor provided at a front end or a rear end of the on / off valve; Opening and closing means for opening and closing the opening and closing valve by hydraulic pressure; A hydraulic cylinder and a piston rod for driving the opening and closing means, a power pack for supplying hydraulic pressure to the hydraulic cylinder by a hydraulic pump, connected to the power pack, and connected to the opening and closing plate in a pumping station discharge side or a landing well inlet side by the pressure sensor. A control unit provided with a solenoid valve for opening or closing the opening / closing plate by opening or closing the piston rod of the hydraulic cylinder when the discharge pressure or the inflow pressure that is applied is equal to or higher than the set pressure value; Characterized in that consists of.

Accordingly, the water hammer linear control valve of the present invention can be easily controlled by adjusting the opening degree of the valve opening by using a triple eccentric butterfly valve, and can easily control the water shock phenomenon, without shaking the head even after the valve is completely closed. Reservoir head can be maintained, and there is a very economic advantage to replace the expensive water shock mitigation equipment.

Water Shock, Triple Eccentric Butterfly Valve, Scotch Yoke Drive

Description

Smart Shock System and Control Method for Water Hammering using it

1 is a view showing a state where a water hammer linear control valve according to the present invention is installed.

Figure 2 is a side view showing a water hammer linear control valve according to the present invention.

Figure 3 is a front view showing a water hammer linear control valve according to the present invention.

4 is a control circuit diagram of a water hammer linear control valve according to the present invention.

5 and 6 is an operation diagram showing an operating state of the water hammer linear control valve according to the present invention.

Figure 7 is a graph showing the pressure control using the water hammer linear control valve according to the present invention.

** Description of the symbols for the main parts of the drawings **

1: discharge tube 10: on-off valve

11: opening and shutting board 12: sheet

20: pressure sensor 30: opening and closing means

31: axis of rotation 32a: long hole

32: rotating plate 33: slide nut

34: hydraulic cylinder 35: piston rod

36: Power Pack 37: Solenoid Valve

38: hydraulic pump 39: accumulator

40: gate valve 41: throttle valve

42: relief valve 43: pilot check valve

50: control unit

The present invention relates to a water hammer linear control valve, and more particularly to a water hammer linear control valve for controlling the water shock generated in the pipeline.

As is well known, the water hammer phenomenon is a phenomenon in which the pressure fluctuates and the flow rate changes suddenly when the flow of the fluid changes when the valve is opened or closed in the pipeline or when the pump is started or stopped.

Especially in the case of a pump station, when the power failure occurs, the moment of inertia of the pump decreases with time, and after a certain period of time, the water in the discharge pipe flows back, causing the check valve installed on the discharge side of the pump to close tightly. "Waterhammer phenomenon" causes high pressure to break the valve or pipeline.

Due to the water pressure increase in the pipeline, equipment such as pumps, valves, flanges, supports, and pipelines may be damaged, or pipelines may be collapsed due to negative pressure. The shock wave breaks the pipeline. In addition, vibrations and noises are generated, and abnormal pressure fluctuations cause devices such as automatic control systems to perform pressure hunting (for example, frequent on / off operation of a pump).

Water shock mitigation devices such as air chambers, surge tanks, or pressure relief valves should be used to prevent water shocks from being excessively reduced or elevated in the pipeline.

Such a water shock mitigation facility has a problem of increasing the cost of equipment because it is expensive equipment, the device was complicated and the operation cost is high.

In case of using the method to control the pressure by limiting, the valve closing time and opening degree should be applied differently according to the pipeline and flow conditions, and the valve adjustment time interval should be fairly precise as at least 1/100 second so that the linear control can be precisely performed. However, in the field, the condition of using the valve is expected to operate correctly with the pre-programmed one, and there is a disadvantage in that the rise head at the valve cannot be linearly controlled even when a slight error occurs.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a water shock linear control valve to facilitate the control of the water shock phenomenon generated in the pipeline.

Another object of the present invention is to provide a water shock linear control valve that can protect the equipment, such as valves, pumps from water shock without the need for a separate water shock mitigation equipment.

Still another object of the present invention is to provide a water shock linear control valve which can control linearly by maintaining a constant pressure head applied to the valve so that an error according to the valve opening degree does not occur.

Water hammer linear control valve according to the present invention for achieving the above object is installed on the pump station discharge side or the landing well inlet side opening and closing valve opening and closing by the rotation of the opening and closing plate; A pressure sensor provided at a front end or a rear end of the on / off valve; Opening and closing means for opening and closing the opening and closing valve by hydraulic pressure; A hydraulic cylinder and a piston rod for driving the opening and closing means, a power pack for supplying hydraulic pressure to the hydraulic cylinder by a hydraulic pump, connected to the power pack, and connected to the opening and closing plate in a pumping station discharge side or a landing well inlet side by the pressure sensor. A control unit provided with a solenoid valve for opening or closing the opening / closing plate by opening or closing the piston rod of the hydraulic cylinder when the discharge pressure or the inflow pressure that is applied is equal to or higher than the set pressure value; Characterized in that consists of.

In addition, the control unit of the present invention is characterized in that the accumulator for storing the pressure generated by the power pack and to drive the hydraulic cylinder in the event of power failure.

In addition, the present invention is the hydraulic cylinder and the piston rod is provided on the upper and lower, respectively, the opening and closing means, the rotary shaft coupled to interlock with the opening and closing plate of the opening and closing valve, coupled to one side end of the rotary shaft is interlocked and predetermined Rotating plate is formed in each of the long hole and the piston rod end of each of the hydraulic cylinder to be symmetrically coupled to each of the long hole about the axis of rotation and the rotation of the rotating plate while sliding along the long hole by the perturbation of the piston rod The slide nut to be characterized in that it is further provided.

The water shock control method of the present invention includes the steps of: a) detecting a discharge pressure or an inlet pressure from a discharge pipe or an inlet pipe connected to a pumping station discharge side or a landing well inlet side by a pressure sensor; b) opening or closing the solenoid valve connected to the power pack supplying the hydraulic pressure generated by the hydraulic pump when the detected pressure is above or below the set pressure value; c) a piston rod driven to draw out the piston rod of the hydraulic cylinder by the hydraulic pressure transmitted from the solenoid valve when the solenoid valve is opened; ; d) opening or closing the opening / closing valve so that the opening / closing means is operated by the piston rod driving so that the pressure applied to the opening / closing plate of the opening / closing valve is constant; It is characterized in that the step is repeated to control the water shock by constant pressure applied to the opening and closing plate by the discharge pressure or inlet pressure of more than or less than the set pressure value.

In addition, the present invention is characterized in that the piston rod of the hydraulic cylinder is driven by the accumulator for storing the pressure generated by the power pack when the operation of the hydraulic pump is stopped at the time of power failure b), c) do.

The present invention relates to a water shock linear control valve that controls the slamming and water hammer phenomena caused by power failure in a pumping station or a water well.

Hereinafter, with reference to the accompanying drawings with reference to the drawings as follows.

1 is a view showing a state of the water hammer linear control valve according to the present invention, Figure 2 is a side view showing a water hammer linear control valve according to the present invention, Figure 3 is a water hammer linear control valve according to the present invention 4 is a control circuit diagram of the water hammer linear control valve according to the present invention, and FIGS. 5 and 6 are operation diagrams showing an operating state of the water hammer linear control valve according to the present invention, and FIG. Is a graph showing pressure control using a water hammer linear control valve.

As shown, the water hammer linear control valve according to the present invention includes a discharge pipe 1 or an on / off valve 10 installed on an inlet pipe connected to a pump station discharge side or an inlet side of a landing well; A pressure sensor 20 provided at a front end or a rear end of the on / off valve 10; Opening and closing means (30) for opening and closing the open / close valve (10) by hydraulic pressure; A control unit 50 which opens the opening and closing means 30 according to a set pressure value; It consists of.

The open / close valve 10 is installed on the discharge pipe 1 connected to the reservoir or the dam and is opened and closed by the rotation of the open / close plate 11. The on-off valve 10 has a structure similar to that of the butterfly valve disclosed in Utility Model Registration Publication No. 20-0242558 (designated name: butterfly valve) filed by the applicant of the present invention. The opening and closing plate 11 is in surface contact with the inclined sheet 12, so that the sealing effect is excellent, and the rotating shaft is eccentric to facilitate the opening and closing action of the opening and closing plate.

The pressure sensor 20 is provided at the front end of the on-off valve 10 to check the pressure, when the checked pressure is more than the set pressure to open the opening and closing plate 11 and the checked pressure is less than the set pressure In this case, a signal is sent to the controller 50 to close the opening and closing plate 11 to control the pressure acting on the opening and closing plate to be constant.

The opening and closing means 30 serves to open and close the opening and closing valve 10 by hydraulic pressure, the rotary plate 31 and the slide nut for rotating the rotary plate 32 and the long hole 32a is provided. It consists of 33.

The rotary shaft 31 is coupled to the opening and closing plate 11 to be interlocked with the opening and closing plate 11 of the opening and closing valve 10.

The rotating plate 32 is coupled to one end of the rotating shaft 31 and interlocked with the rotating shaft 31, and the long holes 32a are symmetrically formed at predetermined portions on both sides thereof.

The slide nut 33 is symmetrically coupled to each of the long holes 32a about the rotation axis 31. At this time, the slide nut 33 is respectively coupled to the long hole 32a of the rotating plate 32, the end of the piston rod 35 of the hydraulic cylinder 34 is coupled to the long hole by the perturbation of the piston rod 35 Slide along the (32a) serves to rotate the rotating plate (32). The slide nut 33 connected to the piston rod 35 of the hydraulic cylinder 34 applies a scotch yoke method.

The controller 50 serves to control the opening and closing action of the on-off valve 10, and comprises a hydraulic cylinder 34, a piston rod 35, a power pack 36 and a solenoid valve 37. The control unit 50 closes the shut-off valve 10 when the pressure sensed by the pressure sensor 20 becomes equal to or greater than the set pressure input by the user, and opens and closes the shut-off valve 10 when the set pressure falls below the set pressure. The working pressure is controlled to be constant. That is, the controller 50 controls the opening and closing of the open / close valve 10 to control the flow rate passing through the open / close plate 11 and the pressure acting on the open / close plate 11.

The hydraulic cylinder 34 and the piston rod 35 serve to drive the opening and closing means 30 by the detection signal of the pressure sensor.

The piston rod 35 is engaged with the slide nut 33, the end of which is coupled to the long hole 32a formed in the rotating plate 32 of the opening and closing means 30, thereby closing the slide nut 33 to the long hole 32a. While rotating along the role of rotating the rotating plate (32). Accordingly, when the rotating plate 32 rotates, the rotating shaft 31 interlocked with the rotating plate 32 rotates, and the opening and closing plate 11 interlocked with the rotating shaft 31 rotates to open and close the plate 11. Will be the opening and closing action. 5 shows a state in which the open / close board 11 is closed, and FIG. 6 shows a state in which the open / close board is opened.

The power pack 36 serves to supply hydraulic pressure to the hydraulic cylinder 34 by the hydraulic pump 38.

The solenoid valve 37 is connected to the power pack 36 and the pressure acting on the opening and closing plate 11 by the pressure sensor 20 in the discharge side or the impingement inlet side of the pump station is greater than or equal to the set pressure value. When opening or closing, the opening and closing of the piston rod 35 of the hydraulic cylinder 34 serves to open or close the opening and closing plate 11 to have an opening angle. When the solenoid valve 37 is opened, the hydraulic pressure is transmitted in the direction in which the piston rod 35 of the hydraulic cylinder 34 is drawn out, and when the solenoid valve 37 is closed, the piston rod 35 of the hydraulic cylinder 34 is closed. Hydraulic pressure is transmitted in the direction of retreat.

The controller 50 may further include an accumulator 39 to store the pressure generated by the power pack 36 and to drive the hydraulic cylinder 34 at the time of power failure. Accordingly, the hydraulic cylinder 34 is driven by the accumulator 39 at the time of power failure, thereby making it possible to prevent damage to the device due to water hammer. Reference numeral 40 is a gate valve, 41 is a throttle valve, 42 is a relief valve, and 43 is a pilot check valve.

7 is a graph illustrating the water shock control using the water hammer linear control valve according to the present invention.

The dotted line shows the pressure acting on the opening and closing plate when the closing valve is closed, and when the closing valve is closed, the pressure hits the opening and closing plate by water flowing out of the reservoir, and the pressure is lowered by recoil again. It is lowered and eventually consumed.

The solid line shows the water shock control using the water hammer linear control valve according to the present invention. When the set pressure is set and the closing valve 10 is closed, when the pressure rises, the opening and closing valve 10 is opened to reduce the pressure acting on the opening and closing plate 11, and when the pressure drops, the closing valve 10 is closed. Equal pressure may be applied to the opening and closing plate 11 in a manner to reduce the pressure acting on the opening and closing plate 11.

The water shock linear control valve having the above configuration is used to control the water shock in the following manner.

The pressure sensor 20 detects the discharge pressure or the inflow pressure discharged from the discharge pipe 1 or the inlet pipe connected to the pump station discharge side or the landing well inlet side. When the detected discharge pressure or inflow pressure is equal to or greater than the set pressure value, the solenoid valve 37 connected to the power pack 36 for supplying the hydraulic pressure generated by the hydraulic pump 38 is opened or closed. When the solenoid valve 37 is opened, the piston rod 35 of the hydraulic cylinder 34 is drawn out by the hydraulic pressure transmitted from the solenoid valve 37, and the hydraulic pressure transmitted from the solenoid valve 37 when the solenoid valve 37 is closed. By the piston rod 35 of the hydraulic cylinder 34 is retracted by the piston rod 35 is driven.

When the piston rod 35 is pulled out, a slide nut 33 having an end portion of the piston rod 35 coupled to the long hole 32a formed on the rotating plate 32 of the opening / closing means 30 receives the long hole 32a. Is moved along to rotate the rotating plate 32, when the rotating plate 32 is rotated the rotating shaft 31 is interlocked with the rotating plate 32 and the opening and closing plate 11 is interlocked with the rotating shaft 31 ) Is rotated to open the opening and closing plate 11 is to open and close the valve 10. On the contrary, when the piston rod 35 is retracted, the slide nut 33 having the end of the piston rod 35 coupled to the long hole 32a formed on the rotating plate 32 of the opening and closing means 30 is the long hole 32a. Is moved along) to rotate the rotating plate 32 in the opposite direction, and when the rotating plate 32 rotates in the opposite direction, the rotating shaft 31 interlocked with the rotating plate 32 rotates in the opposite direction. The opening and closing plate 11 interlocked with the rotating shaft 31 is rotated in the opposite direction, so that the opening and closing plate 11 is closed to close the opening and closing valve 10.

The above-described process is repeated to control the water shock acting on the opening / closing plate 11 by the discharge pressure or the inflow pressure equal to or higher than the set pressure value. At this time, when the operation of the hydraulic pump 38 is stopped at the time of power failure, since the opening and closing of the valve 10 is not made, the hydraulic pressure by the accumulator 39 to store the pressure generated by the power pack 36 The piston rod 35 of the cylinder 34 is driven to open or close the on / off valve 10.

The present invention is not limited to the above-described embodiment, and the scope of application is, of course, various modifications are possible without departing from the gist of the present invention claimed in the claims.

As described above, the water hammer linear control valve according to the present invention can be easily controlled by adjusting the opening degree of the valve opening by using a triple eccentric butterfly valve, and the water shock phenomenon can be easily controlled, and the valve is completely closed. It is possible to maintain the reservoir head without fluctuations in the future, and it is very economical by replacing expensive water shock mitigation equipment.

Claims (3)

An opening / closing valve installed at a pump station discharge side or a landing well inlet side and opened / closed by a rotation of the opening / closing plate; A pressure sensor provided at a front end or a rear end of the on / off valve; Opening and closing means for opening and closing the opening and closing valve by hydraulic pressure; A hydraulic cylinder and a piston rod for driving the opening and closing means; A power pack for supplying hydraulic pressure to the hydraulic cylinder by a hydraulic pump, When the discharge pressure or inlet pressure connected to the power pack and acting on the opening and closing plate in the pumping station discharge side or the landing well inlet direction by the pressure sensor is above or below the set pressure value, the piston rod of the hydraulic cylinder is drawn out or closed. A control unit provided with a solenoid valve for opening or closing the opening and closing plate by driving backward; Water shock linear control valve, characterized in that consisting of. The method of claim 1, The control unit stores a pressure generated by the power pack and a water shock linear control valve, characterized in that the accumulator for driving the hydraulic cylinder in the event of a power failure. The method according to claim 1 or 2, The hydraulic cylinder and the piston rod is provided at the upper and lower, respectively, The opening and closing means, A rotating shaft coupled to interlock with the opening and closing plate of the on / off valve, A rotating plate coupled to one end of the rotating shaft and having a long hole formed at predetermined portions on both sides thereof; A slide nut for symmetrically coupling the piston rod end of each hydraulic cylinder to each of the long holes about the rotation axis and being slid along the long hole by perturbation of the piston rod is further provided. Water shock linear control valve.

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