JPH0443872A - Pressurizing feed water device - Google Patents

Abstract

PURPOSE:To enable a fluid allowed to flow in from the upper side of a pipe line to be continuously pushed out to the lower side of the pipe line while being pressurized by repeatedly operating an input switching valve and first and second input side switching valves. CONSTITUTION:A large piston 2 is pushed toward a first large cylinder room 3 by the fluid of a pipe line which is allowed to flow into a second large cylinder room 4 and the first large cylinder room 3 is contracted accordingly and a fluid in the first large cylinder room 3 is pushed into a first accumulator 15 through a first input side switching valve. A first small cylinder room 7 is contracted by movements of both of small pistons 5,6 associated with that of the large piston 2 and also a second cylinder room 8 is enlarged. A second input side check valve inhibits the passage of the fluid in the first small cylinder room 7 which fluid is pushed out of the room 7 by one small piston 5, and so the fluid is not allowed to flow into a second refuge circuit 13 but a first output side check valve permits the passage of the fluid so the fluid is allowed to flow out into only a first refuge circuit 22 and also the fluid stored in the first accumulator 15 of the first refuge circuit 12 by enlargement of the second small cylinder room 8 is sucked into the second small cylinder room 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pressurized water supply device used to increase fluid pressure in a pipeline.

BACKGROUND OF THE INVENTION Conventionally, motors such as pumps have been used to increase fluid pressure in water pipes in residential buildings, industrial fluid pipes, and the like.

Problems to be Solved by the Invention However, when increasing fluid pressure using a motor such as a pump in the middle of a pipe, a separate pump is required in addition to the pump at the proximal end of the pipe. This requires associated equipment such as a storage tank, which poses the problem of increasing the size of the equipment.

Furthermore, in order to increase the fluid pressure at the proximal end of the conduit, it is necessary to increase the size of a motor such as a pump and to replace the conduit at the proximal end with a thicker conduit.

The present invention solves the above problems, and aims to provide a pressurized water supply device that can be easily installed in the middle of a pipeline and does not require a separate driving force.

Means for Solving the Problems In order to solve the above problems, the present invention has a first large cylinder chamber and a second large cylinder chamber separated by a large piston, and a cylinder chamber provided on both sides of the large piston. A pressure increasing cylinder having a first small cylinder chamber and a second small cylinder chamber formed on the back surface of a pair of interlocking small pistons, and a first large cylinder chamber and a second large cylinder chamber of the pressure increasing cylinder located upstream of a conduit. an input circuit having an input switching valve selectively connected to the side; a first escape circuit provided to communicate the first large cylinder chamber and the second small cylinder chamber of the pressure boosting cylinder; A second evacuation circuit is provided to communicate the two large cylinder chambers and the first small cylinder chamber, and communicates the first small cylinder chamber of the pressure booster cylinder with the downstream side of the conduit, and only to the downstream side of the conduit. A first output circuit having a first output side check valve that allows passage of fluid communicates with a second small cylinder chamber of the pressure booster cylinder and the downstream side of the conduit, and allows fluid to flow only to the downstream side of the conduit. the second which allows the passage of
a second output circuit having an output side check valve; It has a first accumulator for storage, and a first input side switching valve that selectively connects the first accumulator to the first large cylinder chamber and the discharge circuit, and the second evacuation circuit connects only to the first small cylinder chamber side. A second input side check valve that allows fluid to pass through, a second accumulator that stores fluid in the circuit, and a second input side switch that selectively connects the second accumulator to the second large cylinder chamber and the discharge circuit. The configuration includes a valve.

Operation With the above-described configuration, the input switching valve of the input circuit is operated to communicate the upstream side of the conduit with the first large cylinder chamber, and
The first input side switching valve of the first escape circuit is operated to cut off communication between the first accumulator and the first large cylinder chamber, and the second
The second input side switching valve of the shunt circuit is operated to communicate the second accumulator with the second large cylinder chamber. In this state, the large piston is pressed toward the second large cylinder chamber by the fluid in the pipe flowing into the first large cylinder chamber, the second large cylinder chamber contracts, and the fluid in the second large cylinder chamber is input to the second large cylinder chamber. It is pushed out to the second accumulator through the side switching valve. Furthermore, as both small pistons move in conjunction with the large piston, the second small cylinder chamber contracts and the first small cylinder chamber expands, so that the fluid in the second small cylinder chamber that is pushed out by one of the small pistons is without being blocked by the first input side check valve and flowing into the first shunt circuit.
The fluid is allowed to pass through the second output side check valve and flows out only to the second output circuit, and the fluid stored in the second accumulator of the second escape circuit due to the expansion of the first small cylinder chamber is transferred to the first small cylinder chamber. is inhaled.

At this time, the fluid pressure in the first large cylinder chamber and the second
The pressure ratio of the fluid in the small cylinder chamber is inversely proportional to the cross-sectional area of the first large cylinder chamber and the second small cylinder chamber,
The fluid in the second small cylinder chamber is pressurized and flows out to the second output circuit.

When the contraction of the second large cylinder chamber is completed, the input switching valve of the input circuit is operated to communicate the upstream side of the conduit with the second large cylinder chamber, and the second input side of the second shunting circuit is connected to the second large cylinder chamber. The switching valve is operated to cut off communication between the second accumulator and the second large cylinder chamber, and the first input side switching valve of the first shunt circuit is operated to communicate the first accumulator and the first large cylinder chamber. In this state, the large piston is pushed toward the first large cylinder chamber by the fluid in the conduit flowing into the second large cylinder chamber, the first large cylinder chamber contracts, and the fluid in the first large cylinder chamber enters the first large cylinder chamber. It is pushed out to the first accumulator through the side switching valve. Furthermore, as both small pistons move in conjunction with the large piston, the first small cylinder chamber contracts and the second small cylinder chamber expands, so that the fluid in the first small cylinder chamber pushed out by one of the small pistons is Passage is blocked by the second input side check valve and the second
It does not flow into the shunt circuit, but is allowed to pass through the first output side check valve and flows out only into the first output circuit, and is stored in the first accumulator of the first shunt circuit due to the expansion of the second small cylinder chamber. The fluid is sucked into the second small cylinder chamber.

From now on, the input switching valve and the first. By repeatedly operating the second input side switching valve, the fluid flowing in from the upstream side of the conduit is continuously pushed out to the downstream side of the conduit in an increased pressure state.

EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In the figure, a pressure increasing cylinder 1 has a first large cylinder chamber 3 and a second large cylinder chamber 4 separated by a large piston 2. Furthermore, a pair of small pistons 5 and 6 are formed on both sides of the large piston 2, and a first small cylinder chamber 7 and a second small cylinder chamber are formed on the back surface of each small piston 5 and 6.
A small cylinder chamber 8 is formed.

The first large cylinder chamber 3 and the second large cylinder chamber 4 of the pressure boosting cylinder 1 communicate with the upstream side of the conduit 10 via an input circuit 9. An electromagnetic input switching valve 11 is interposed to selectively connect the second large cylinder chamber 4 to the conduit lO. Further, a first evacuation circuit 12 is provided to communicate the first large cylinder chamber 3 and the second small cylinder chamber 8 of the pressure boosting cylinder 1, and to communicate the second large cylinder chamber 4 and the first small cylinder chamber 7. 2nd backup circuit 1
3 is provided. This first save circuit 12 includes a second
A first input side check valve 14 that allows fluid to pass only to the small cylinder chamber 8 side, a first accumulator 15 that stores fluid in the circuit, and a first accumulator 15 that discharges from the first large cylinder chamber 3. An electromagnetic first input side switching valve 17 selectively connected to the circuit 16 is interposed, and the second escape circuit 13 allows fluid to pass only to the first small cylinder chamber 7 side. A second input side check valve 18, a second accumulator 19 that stores fluid in the circuit, and an electromagnetic second input that selectively connects the second accumulator 19 to the second large cylinder chamber 6 and the discharge circuit 20. A side switching valve 21 is interposed.

Then, the first small cylinder chamber 7 of the pressure booster cylinder 1 and the pipe line 1
A first output circuit 22 is provided to communicate the downstream side of the pipe IO, and the first output circuit 22 is provided with a first output side check valve 23 that allows fluid to pass only to the downstream side of the pipe line IO. equipped. Further, a second output circuit 24 is provided to communicate the second small cylinder chamber 8 of the pressure boosting cylinder 1 with the downstream side of the pipe line 1O, and the second output circuit 24 has a fluid flow only to the downstream side of the pipe line. A second output side check valve 25 is interposed to allow passage of. Furthermore, the first output circuit 22 or the second output circuit 24
A pressure switch 26 is installed in the input switching valve 1.
1, the first input side switching valve 17, and the second input side switching valve 21 are connected to a timer 27.

Hereinafter, the effects of the above configuration will be explained.

When the pressure P on the downstream side of the pipe line 10 becomes equal to or lower than the set pressure P of the pressure switch 26, the timer 27 is started, and the input switching valve 11, the first input switching valve 17, and the second input switching valve 21 are switched at a constant cycle. Automatic switching from ON to OFF is performed.

Then, by operating the input switching valve 11 of the input circuit 9,
0 and the first large cylinder chamber 3,
Operate the first input side switching valve 17 of the first shunting circuit I2 to cut off communication between the first accumulator 15 and the first large cylinder chamber 3, and operate the second input side switching valve 21 of the second shunting circuit 13. The second accumulator 19 and the second large cylinder chamber 4 are communicated with each other. In this state, the large piston 2 is pressed toward the second large cylinder chamber 4 by the fluid in the conduit 10 flowing into the first large cylinder chamber 3, the second large cylinder chamber 4 contracts, and the second large cylinder chamber 4 is pushed out to the second accumulator 19 through the second input side switching valve 21. In addition, both small pistons 5 interlocked with the large piston 2,
6, the second small cylinder chamber 8 contracts and the first small cylinder chamber 7 expands, so that the fluid inside the second small cylinder chamber 8 pushed out by one of the small pistons 6 is transferred to the first input side. It is not blocked by the check valve 14 and flows into the first escape circuit 12, but is allowed to pass by the second output side check valve 25 and flows only into the second output circuit 24, and the first small cylinder Due to the expansion of the chamber 7 , the fluid stored in the second accumulator 19 of the second shunt circuit 13 is allowed to pass through the second input side check valve 18 and is sucked into the first small cylinder chamber 7 .

At this time, the fluid supply pressure Ps in the first large cylinder chamber 3 and the fluid discharge pressure PD in the second small cylinder chamber 8
The ratio is inversely proportional to the ratio of the cross-sectional area A of the first large cylinder chamber 3 to the cross-sectional area A2 of the second small cylinder chamber 8.
The fluid inside the small cylinder chamber 8 is pressurized and flows out to the second output circuit 24 .

The pressure Pn is Pa ” [Ps At −Po
(At A2) Ko /
A2. However, Po is the fluid pressure in the second large cylinder chamber 4 and the first small cylinder chamber 7.

Then, at the lapse of an appropriate time when the contraction of the second large cylinder chamber 4 is completed, the input switching valve 11 of the input circuit 9 is operated to communicate the upstream side of the conduit 10 with the second large cylinder chamber 4, The second input side switching valve 21 of the second shunting circuit 13 is operated to cut off the communication between the second accumulator 19 and the second large cylinder chamber 4, and the first input side switching valve 17 of the first shunting circuit 12 is operated. The first accumulator 15 and the first large cylinder chamber 3 are communicated with each other. In this state, the second large cylinder chamber 4
The large piston 2 is caused by the fluid in the pipe 10 flowing into the first
The first large cylinder chamber 3 is compressed by being pressed toward the large cylinder chamber 3, and the fluid inside the first large cylinder chamber 3 is pushed out to the first accumulator 15 through the first input side switching valve 17. Furthermore, as the first small cylinder chamber 7 contracts and the second small cylinder chamber 8 expands due to the movement of both small pistons 5 and 6 in conjunction with the large piston 2, the first small cylinder chamber 8 is pushed out by one of the small pistons 5. Small cylinder chamber 7
The fluid inside is not blocked by the second input check valve 18 and flows into the second shunt circuit 13, but is allowed to pass by the first output check valve 23 and flows into the first output circuit 22. At the same time, due to the expansion of the second small cylinder chamber 8, the fluid stored in the first accumulator 15 of the first shunt circuit 12 is sucked into the second small cylinder chamber 8. In addition, the first accumulator 15 and the second accumulator 1
Excess fluid in 9 is drained to drain circuit IG, 20.

Thereafter, the input switching valve 11 and the first. second input side switching valve 17;
By repeatedly operating 21, the fluid flowing in from the upstream side of the conduit 10 is continuously pushed out to the downstream side of the conduit 20 in an increased pressure state.

Effects of the Invention As described above, according to the present invention, the first. The fluid pressure in the second large cylinder chamber and the first. The pressure ratio of the fluid in the second small cylinder chamber is the first. The second large cylinder chamber and the first. It is inversely proportional to the cross-sectional area of the second small cylinder chamber, and is inversely proportional to the cross-sectional area of the second small cylinder chamber. By repeatedly operating the second input side switching valve, the fluid flowing in from the upstream side of the conduit can be continuously pushed out to the downstream side of the conduit in an increased pressure state.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. 1... Pressure increase cylinder, 2... Large piston, 3...
First large cylinder chamber, 4...Second large cylinder chamber, 7...
・First small cylinder chamber, 8...Second small cylinder chamber, 9・
...Input circuit, 12...First save circuit, 13...Second save circuit, 22...First output circuit, 24...Second
Output circuit.

Claims (1)

[Scope of Claims] 1. It has a first large cylinder chamber and a second large cylinder chamber separated by a large piston, and is formed on the back surface of a pair of small pistons provided on both sides of the large piston and interlocked with the large piston. an input switching valve that selectively connects the first large cylinder chamber and the second large cylinder chamber of the pressure increase cylinder to the upstream side of a conduit. a first evacuation circuit provided to communicate the first large cylinder chamber and the second small cylinder chamber of the pressure boosting cylinder, and the second large cylinder chamber and the first small cylinder chamber of the pressure boosting cylinder. and a first output side that communicates the first small cylinder chamber of the pressure booster cylinder with the downstream side of the conduit and allows fluid to pass only to the downstream side of the conduit. A first output circuit having a check valve, and a second output circuit that communicates between the second small cylinder chamber of the pressure booster cylinder and the downstream side of the conduit, and allows fluid to pass only to the downstream side of the conduit.
a second output circuit having an output side check valve; It has a first accumulator for storage, and a first input side switching valve that selectively connects the first accumulator to the first large cylinder chamber and the discharge circuit, and the second evacuation circuit is connected only to the first small cylinder chamber side. A second input side check valve that allows fluid to pass through, a second accumulator that stores fluid in the circuit, and a second input side switch that selectively connects the second accumulator to the second large cylinder chamber and the discharge circuit. A pressurized water supply device characterized by having a valve.