JP2003021068A - Flow equalibrium adjusting device for hydraulic machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the energy by preventing the quick start and stop of a flow equalibrium adjusting device. SOLUTION: This flow equalibrium adjusting device has a storage chamber inside thereof to store a control valve plate having elastic members at both sides, a top end of the control valve plate is formed on a cylinder, and provided with a hydraulic inlet 17 in which a piston member mounted on the control valve plate is fitted and which is communicated to the cylinder, further a control valve 10 is mounted on an inlet conduit 21 of the hydraulic machine 20, and the hydraulic inlet 17 is connected to an outlet conduit 22 of the hydraulic machine 20 by means of a connecting pipe 23. Whereby the water pressure of the outlet conduit 22 of the hydraulic machine 20 can be introduced into the cylinder, and a height position of the control valve plate can be changed by the interaction of the water pressure and the elastic force of the elastic member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate balance adjusting device for a water pressure machine, and more particularly to a flow rate balance adjusting device for a water pressure machine of a pressure switch control type balance pressure water pressure machine.

[0002]

2. Description of the Related Art Conventionally, water supply systems for buildings and other public places are usually designed to maintain a stable water pressure in a water supply line so that an appropriate water pressure can be maintained anywhere in a building. A water pressure machine used to stabilize the water pressure is installed on the water supply pipeline. Therefore, the control system that stably controls the pressure of the water pressure machine is known to be mainly a mechanical differential pressure type water pressure machine and a variable frequency constant pressure water pressure machine that controls using a variable frequency motor due to its structure. ing.

The variable frequency constant pressure hydraulic machine drives a pressurizing pump by using a variable frequency motor capable of changing the rotation speed. Also, the rotation speed of the motor can be controlled in combination with a frequency converter. The operating method is to detect the pressure in the water supply pipe with a water pressure sensing device, and when the pressure in the water supply pipe is low, control the motor to drive at a relatively high rotational speed,
When the water pressure approaches the water pressure upper limit of the water supply line, the rotation speed of the motor is lowered, and when the water pressure exceeds the upper limit of the water supply line pressure, the motor is controlled to stop the operation. is there. Therefore, when the amount of water used in the water supply pipe is large, the width of the pressure drop in the water supply pipe becomes large. At this time, the frequency converter controls the motor to operate at a relatively high rotational speed to increase the water output of the pump and increase the pressure of the water supply line. Thus, when the amount of water used in the water supply line decreases, the width of the pressure drop in the water supply line decreases. At this time, the frequency converter controls the motor to operate at a relatively low rotation speed to reduce the water output of the pump. Therefore, the pressure in the water supply line does not rise rapidly.

The advantage of the variable frequency type constant pressure water pressure machine is that the pressurizing force that changes the rotation speed of the motor can be controlled by the frequency converter, and the amount of water output from the pump is adjusted to the amount of water in the water supply line. The speed of the motor can be controlled accurately, and it is possible to avoid the situation where the motor that starts rapidly stops immediately due to the rapid increase in pressure in the water supply line after the motor starts. . Thus, the motor of the water pressure machine can be operated smoothly, and the operating efficiency of the motor can be improved to save energy.

However, the variable frequency constant pressure hydraulic machine must always adopt a variable frequency motor having a complicated structure. In addition to that, the cost of the frequency converter is considerably high, and thus the selling price of this type of variable frequency water pressure machine is also considerably high, and the maintenance and repair costs thereof are also considerably high. Due to such a cause, the cost of the conventional variable frequency type constant pressure water pressure machine is high, and the maintenance and maintenance cost is also high, so that the variable frequency water pressure machine is usually used for a large-scale water supply system. I'm just there.

Other mechanical differential pressure water pressure machines use pressure switches to control the starting and stopping of the motor. The motor uses a fixed rotation speed motor. The pressure switch can set an upper limit and a lower limit of pressure. As a result, when the water pressure in the water supply line becomes lower than the lower limit, the motor starts and operates the pump to pressurize, and when the water pressure in the water supply line becomes higher than the upper pressure limit, the motor is controlled and operated. To stop. The stopped state of the motor continues until the water pressure in the water supply line becomes lower than the lower limit because the water consumption of the water supply line causes a decrease in water pressure, and when the water pressure in the water supply line becomes lower than the lower limit, The motor reactivates and activates the pump to pressurize. Besides, in order to delay the rise and fall of the pressure in the water supply line, the water supply line is usually provided with an accumulator at the outlet of the hydraulic pressure machine. The inside of the accumulator can be sufficiently filled with air. Alternatively, elastic pieces can be provided. The accumulator maintains the water pressure, and when the water pressure machine is activated and pressurized, the water flow flows into the accumulator, and after the water pressure machine stops the operation, the air pressure of the accumulator or the pressure of the membrane piece. A stream of water can be injected into the water supply line to moderate the rate of pressure drop in the water supply line.

This type of mechanical differential pressure hydraulic machine has a relatively simple motor structure and control system, and also has a relatively simple overall structure.
The cost is relatively low, and maintenance work is relatively easy. However, since the motor used is operating at a fixed rotation speed, after the pressure switch controls and starts the motor of the hydraulic machine, the pump of the hydraulic machine can only supply water at the maximum water output. As much as possible, the water output of the pump of the water pressure machine maintains a fixed flow regardless of the amount of water used in the water supply pipeline.

Therefore, in order for the water pressure machine to supply water according to the flow rate at the peak of the amount of water used by the water supply pipe, the amount of water output of the pump used must always correspond to the flow rate of the water condition at the peak. Must be one. Thus, for the first time, it is possible to provide the amount of water discharge according to the amount of water used. However,
When the amount of water in the water supply line is not at a peak, the amount of water in the water supply line decreases. However, since the motor of the water pressure machine still operates at full speed, the water output of the pump is much higher than the demand for the water volume of the water supply line, and the pressure of the water supply line is reduced within a short time after the water pressure machine is started. Raises above pressure limit set by pressure switch. Therefore, after the water pressure machine is started, it immediately comes to a stop in a short time, and the start and stop operations of the motor are performed very frequently.

Thus, when the motor consumes the most power during operation, it is the moment of starting. Therefore, if the motor is frequently started and stopped, considerable power consumption will occur. or,
When the water supply line is in a low water condition, the motor of the water pressure machine is still operating at full speed, so the motor of the water pressure machine is also in a state of high power consumption maintaining a high water condition. Therefore, also in this case, a considerable amount of energy is consumed.
Furthermore, in the low water consumption state, the water output of the pump of the water pressure machine is much larger than the water volume of the water supply line, and a large back pressure is applied to the outlet line of the pump of the water pressure machine. Become. As a result, the operating load of the pump of the water pressure machine is weighted, and the power consumption of the motor of the water pressure machine becomes extremely large.

Due to the above-mentioned causes, the pressure stabilizer of the conventional hydraulic machine has a considerable number of drawbacks in use, and it is necessary to improve it. The present inventor has finally arrived at the present invention after conducting extensive research after actively searching for problems in view of the above-mentioned deficiencies, and continuously conducting tests and improvements with many years of experience in research and development of correlated components.

[0011]

It is possible to avoid the water pressure machine from being rapidly started and stopped, and the amount of water output can appropriately correspond to the amount of water in the water supply state of the water supply pipeline. Therefore, the energy consumption can be reduced, and further, the technical problem to be solved in order to improve the efficiency of the variable frequency water pressure machine in combination with the mechanical differential pressure water pressure machine arises. The present invention aims to solve the problems.

[0012]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and has a flat control valve plate having a storage chamber inside and a rectangular lower end. Further, the top end of the control valve plate is formed into a cylinder, and the piston member provided in the control valve plate is fitted therein, and elastic members are installed on both sides of the control valve plate. A water pressure inlet communicating with the cylinder is provided at the top end of the control valve, which is configured to be compressed when the control valve plate moves downward and push the control valve plate upward. The control valve is installed on the inlet line of the water pressure machine, and the water pressure inlet is connected to the outlet of the water pressure machine by a connecting pipe. The control valve plate is connected to the pipe line, and thus the water pressure of the outlet line of the hydraulic machine can be introduced into the inside of the cylinder, and the interaction between the water pressure and the elastic force of the elastic member can control the control valve plate. Is formed so that the height position of
Thus, the present invention provides a flow rate balance adjusting device for a hydraulic machine, which is characterized in that the flow rate of the flowing water passage can be changed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. As shown in FIGS. 1 and 2, the flow balance adjusting device for a hydraulic machine of the present invention includes the following.

A control valve 10 is provided, and the control valve 10 is installed in an inlet line 21 of the hydraulic machine 20. Further, a connecting pipe 23 is provided, and the connecting pipe 23 is connected to the outlet pipe line 22 of the hydraulic machine 20 and the control valve 1.
It is formed to connect 0 and introduce the water pressure of the outlet line 22 of the water pressure machine 20 into the control valve 10. Further, it has a pressure switch 24, which is installed on the outlet conduit 22 to sense the water pressure in the outlet conduit 22 and control the start and stop of the water pressure machine 20. Furthermore, it has an accumulator 25, and the accumulator 25 is installed on the outlet line 22 and is used to maintain the water pressure of the outlet line 22. A control valve plate 30 is provided inside the control valve 10. The control valve plate 30 is formed so as to be pushed and moved by receiving the water pressure in the outlet pipe line 22 and can move in the vertical direction. Thus, the control valve 10
It is possible to change the flow rate of the inlet pipe line 21 of the water pressure machine 20 by changing the flow rate of. As a result, the water pressure machine 20 can maintain the amount of water output according to the state of the water for differential use.

A running water passage 11 is provided below the inside of the control valve 10. In addition, as described above, the control valve plate 30 is provided in the control valve 10 so as to be vertically slidable, and the lower end of the control valve plate 30 is formed so as to be inserted into the running water passage 11. There is. Furthermore, as shown in FIG. 3, when the control valve plate 30 descends to the lowest position, the control valve plate 30 comes into contact with the inner wall surface around the flowing water passage 11 and the flowing water passage 11
Is appropriately shielded. Further, the elastic member 40
Are provided on both sides of the control valve plate 30. The elastic member 40 can push the control valve plate 30 upward. Therefore, the control valve plate 30 can be held at the uppermost end of the operation stroke when the water pressure machine is not operated, and the flowing water passage 11 can be opened.

As shown in FIG. 2, the control valve plate 30 is formed of a flat plate, and a piston member 31 is provided in the upper center portion thereof, and a valve flap 32 is provided at the lower end thereof. . The width of the valve flap 32 is formed larger than the width of the piston member 31. Fixing bolts 33 are provided on both sides of the upper end of the valve flap 32, respectively.
The elastic member 40 is fitted. The lower end of the fixing bolt 33 is fastened to the top end of the valve flap 32, and the upper end thereof has a convex edge 34 having a diameter larger than that of the elastic member 40. The elastic member 40 is attached to the fixing bolt 33, and the top end thereof is the convex edge 34.
Is pressed against the lower surface of the, and its lower portion is pressed onto the washer 35. The washer 35 is fitted to the fixing bolt 33 so as to be slidable.

As shown in FIGS. 2 and 4, the control valve 10 is composed of two blocks 12 and 13 at the front and rear. The two blocks 12 and 13 are tightened by facing each other with screws. As shown in FIGS. 2 and 3, the block 13 of the control valve 10 has a housing chamber 14 for housing the control valve plate 30.
Is provided. The accommodating chamber 14 is formed so that the control valve plate 30 can move in the control valve 10. Further, the accommodation chamber 14 has a flat shape, and the control valve plate 30
The valve flap 32 is formed so that it can be accommodated therein. Further, the upper end of the accommodating chamber 14 is in the shape of a cylinder 15 so that it can be fitted with the piston member 31 of the control valve plate 30. The piston member 31 is movably installed in the cylinder 15, and a seal member 36 is provided on the top end thereof. The seal member 3
6 is fixed to the top end of the piston member 31,
The soft colloid has a substantially rectangular shape, and its periphery is in close contact with the wall surface of the cylinder 15. A water pressure inlet 17 is installed at the top end of the control valve 10. As shown in FIG. 1, the water pressure inlet 17 is connected to the outlet line 22 of the water pressure machine 20 by a connecting pipe 23. Therefore, the outlet water pressure of the water pressure machine 20 can be introduced into the cylinder 15 inside the control valve 10. Thus, the piston member 31 can be moved downward by being pushed by the water pressure.

Further, as shown in FIGS. 2 and 5, the blocks 13 are provided with storage tanks 18 on both sides of the cylinder 15, respectively. The storage tank 18 is used for inserting the elastic member 40 and the fixing bolt 33. The diameter and length of the storage tank 18 are the same as those of the elastic member 40.
The width and length of the fixing bolt 33 are larger than that of the fixing bolt 33, and the bottom end portion of the fixing bolt 33 has a stop portion 19 for stopping the washer 35 thereon. As a result, the lower end of the elastic member 40 is stopped by the stop portion 19 and receives pressure, so that the control valve plate 3
The elastic member 40 is formed so as to be compressed when 0 moves downward.

Further, as shown in FIG. 3, the control valve plate 30 is connected to the outlet pipe line 22 of the hydraulic pressure machine 20.
It moves downward due to the water pressure. At this time, the elastic member 40 is compressed, and the acting force of the elastic member 40 acts to push the control valve plate 30 upward. Therefore, the outlet pipe 2 of the water pressure machine 20
When the water pressure of 2 pushes and moves the control valve plate 30 downward, the elastic force of the elastic member 40 must be overcome. The greater the water pressure, the greater the movement of the control valve plate 30. On the contrary, when the water pressure is reduced,
The elastic force of the elastic member 40 pushes the control valve plate 30 upward.

Further, due to the interaction between the water pressure of the outlet conduit 22 and the elastic force of the elastic member 40, the control valve plate 30 moves to the different height positions under the different water pressure conditions. Thus, when the height position of the control valve plate 30 changes, the degree to which the flow passage 11 is blocked by the valve flap 32 of the control valve plate 30 also changes accordingly. Thus, the flow rate of the water flow flowing through the water flow passage 11 also changes.

According to the present invention, when the pressure in the water supply line rises, the control valve plate 30 is pushed downward by the water pressure, and the flow rate of the water flow flowing through the water flow passage 11 of the control valve 10 is reduced. Thus, when the pressure in the outlet conduit 22 drops, the control valve plate 30 is pushed up by the elastic member 40, and the openness of the running water passage 11 increases. Therefore, the flow rate of running water increases.

When the outlet line 22 is in a low water condition,
The amount of water output from the water pressure machine 20 becomes larger than the amount of water used in the water supply line, and thus the pressure in the outlet line 22 increases. At this time, the control valve plate 30 also moves downward as the water pressure increases, so that the flow rate of the flowing water in the inlet pipe 21 of the water pressure machine 20 also decreases. Therefore, the amount of water passing through the blades of the pump of the water pressure machine 20 also decreases, and the amount of water output from the water pressure machine 20 also decreases accordingly. On the contrary, when the amount of water in the water supply line increases, the pressure in the outlet line 22 decreases, so that the control valve plate 30 moves upward correspondingly. Therefore, the flow rate of the water flow passing through the water flow passage 11 increases. Therefore, the flow rate of the water flow in the inlet pipe line 21 of the water pressure machine 20 also increases. Thus, the amount of water output from the water pressure machine 20 also increases.

By the action of the control valve 10, after the water pressure machine 20 is started, the amount of water output can be appropriately changed according to the water condition of the water supply pipeline.
Therefore, when the water supply line is in a low water condition, the water pressure machine 2
The water discharge of 0 also decreases accordingly. Furthermore, after the water pressure machine 20 is started, the pressure of the outlet pipe 22 is prevented from rising rapidly, and the operation time after the water pressure machine 20 is started can be extended and the water pressure machine 20 is It is possible to save energy consumption of the water pressure machine 20 by avoiding the situation of frequent start and stop. Furthermore,
When the water pressure machine 20 is using low water, the amount of water passing through the blades of the pump of the water pressure machine 20 also decreases accordingly. Therefore, the load on the water pressure machine 20 can be reduced, and the energy consumption of the water pressure machine 20 can be reduced as much as possible.

[0024]

The flow rate balance adjusting device for a water pressure machine according to the present invention can maintain an equilibrium state between the water discharge amount of the water pressure machine and the water supply state of the water supply line. In addition, the water pressure machine is spared from frequent start-up and shut-down operations, thus saving energy consumption. It can also be used in combination with a mechanical differential pressure type water pressure machine. This is an invention that has an extremely significant effect, such as an effect similar to that of a variable frequency water pressure machine.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is an explanatory diagram of a flow balance adjusting device for a water pressure machine.

FIG. 2 is a vertical sectional view of a control valve used in the present invention.

FIG. 3 is a vertical cross-sectional view showing a state where a control valve plate of the control valve of the present invention is moved downward by being pushed by water pressure.

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

5 is a cross-sectional view taken along line 5-5 of FIG.

[Explanation of symbols]

10 control valve 11 running water passage 12,13 blocks 14 accommodation room 15 cylinders 17 Water pressure inlet 18 storage tanks 19 stop 20 water pressure machine 21 Inlet pipeline 22 Exit line 23 Connection pipe 24 pressure switch 25 Accumulator 30 control valve plate 31 Piston member 32 valve flaps 33 fixing bolt 34 convex edge 35 washer 36 Seal member 40 elastic member

Claims (3)

[Claims] 1. A device installed on an inlet line of a hydraulic machine, and
A control valve having a running water passage is provided, a control valve plate is installed inside the control valve so as to be vertically slidable, and the control valve plate has a flat valve flap. Further, a piston member having a rectangular cross section is provided at the top end thereof, and when the control valve plate moves to the lowermost position, the flowing water passage is almost shielded, and further, the control valve plate reaches the uppermost end. The flow passage is formed so as to be opened when moved, while a storage chamber is provided inside the control valve, and the valve flap of the control valve plate is slidably disposed in the storage chamber. And the top end of the accommodation chamber is formed into a cylinder, The piston member is slidably inserted and elastic members are attached to both sides of the control valve plate, and the elastic members are loosely fitted to fixing bolts arranged on both sides of the control valve plate. Further, the elastic member and the fixing bolt are disposed in the storage tanks provided on both sides of the control valve storage chamber, and the top end of the elastic member is fixed to the fixing bolt. , Its lower end is fixed to the bottom end of the storage tank, and further, a water pressure inlet is provided at the top end of the control valve and communicates with the cylinder, and the water pressure inlet is connected to the water pressure by a connecting pipe. It is connected to the outlet line of the machine and is formed so that the water pressure of the outlet line of the hydraulic machine can be introduced into the inside of the cylinder.
Due to the combination of the materials, the water pressure of the outlet line of the water pressure machine can push and move the control valve plate, and the height of the control valve plate can be increased by the interaction between the water pressure and the elastic force of the elastic member. The position of the water flow passage can be changed, and the flow passage can be changed in response to a change in the shielding state of the valve flap of the control valve plate to change the flow rate of the water flow passage. Balance adjustment device for machine. 2. The hydraulic machine according to claim 1, wherein a seal member is provided on the top end of the piston member of the control valve plate so as to be in close contact with the inner wall surface of the cylinder. Flow balance adjusting device. 3. The control valve plate is provided with a cutout at a lower end of the valve flap, and when the valve flap comes into close contact with the flowing water passage by the cutout, the cutout allows the running water to flow. The flow balance adjusting device for a hydraulic machine according to claim 1, which is formed.