JP2002039105A - Intensifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intensifier capable of improving intensifying effect without increasing consumption power by reusing exhaust air. SOLUTION: An outlet port 1c of an intensifying valve 10 on the upstream side is communicated with an inlet port 2a of an intensifying valve 20 on the downstream side, and an inlet port 1b of the intensifying valve 10 on the upstream side is communicated with an exhaust port 2c of the intensifying valve 20 on the downstream side to introduce exhaust air in drive chambers 26a, 26b of the intensifying valve 20 on the downstream side into drive chambers 16a, 16b of the intensifying valve 10 on the upstream side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure increasing device for increasing and outputting air pressure.

[0002]

2. Description of the Related Art Conventionally, in a pressure booster of this type, pistons of a pair of cylinders connected via a partition are connected by rods penetrating the partition, and are formed outside each piston from an air source. These pistons were reciprocated by alternately supplying air pressure to the drive chamber via a switching valve, and the air pressure was increased and output in a pressure increasing chamber formed inside the piston, and the piston was reciprocated. Later, the unnecessary air is discharged into the atmosphere as exhaust air and discarded.

[0003]

By the way, in the above-described pressure intensifier, after the piston is driven, unnecessary air is discarded into the atmosphere as exhaust air. Therefore, a plurality of pressure intensifiers are connected in series. Attempting to increase the pressure boosting effect increases the air consumption because the exhaust air is dumped into the atmosphere from each pressure booster, thereby forcing the air source to supply a large amount of air. There is a problem that the power is increased and the running cost is increased.
The present invention has been made in view of the above-described problems, and an object of the present invention is to improve a pressure-increasing effect without increasing power consumption by reusing exhaust air. It is an object of the present invention to provide a pressure intensifier capable of reducing the pressure. The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0004]

In order to achieve the above object,
A pressure intensifier according to the present invention includes: a pair of cylinders provided so as to sandwich a partition having an inlet port for introducing air, an outlet port for outputting boosted air, and an exhaust port for discharging exhaust air; A pair of pistons reciprocating in a pair of cylinders and connected by rods penetrating the partition wall in an airtight manner, and air from the inlet port to the partition wall to each of the pressure-increasing chambers inside the pair of pistons; An inlet check valve that allows only inflow of air, an outlet check valve that allows only inflow of air from each of the pressure-intensifying chambers to the outlet port, and a drive chamber outside the pair of pistons is connected to the inlet port. A pressure booster comprising a plurality of pressure boosting valves having a switching valve for switching to said exhaust port to communicate therewith, wherein said pressure boosting valve is connected in series to an air source, and said pressure boosting valve has an outlet port on the upstream side and an upstream port on the downstream side. While communicating with the inlet port of the booster valve, the inlet port of the booster valve on the upstream side communicates with the exhaust port of the booster valve on the downstream side, and the exhaust air in the drive chamber of the booster valve on the downstream side is connected to the upstream side. And the exhaust air from the downstream pressure booster valve is used as a drive source for the upstream pressure booster valve.

Therefore, in the present invention, first, air from the air source passes through the upstream pressure intensifier valve and flows into the downstream pressure intensifier valve. While being output, the exhaust air in the drive chamber is introduced into the upstream pressure booster valve, and drives the upstream pressure booster valve together with the air from the air source. As described above, according to the present invention, the air pressure increased by the upstream pressure increasing valve is further increased by the downstream pressure increasing valve. At this time, the exhaust air discharged from the downstream pressure increasing valve is increased by the upstream pressure increasing valve. Since it is used for driving the pressure valve, air consumption is reduced.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. In describing the embodiments, those having the same functions will be denoted by the same reference numerals. 1 and 2 are a schematic configuration diagram and a schematic cross-sectional view of a pressure booster according to an embodiment of the present invention.

That is, as shown in FIG.
The first pressure increasing valve 10 and the second pressure increasing valve 20 are connected to each other. The first pressure increasing valve 10 is connected to the air source P, and the first pressure increasing valve 10 and the second pressure increasing valve 20 are connected in series. I have. 2, in a first pressure increasing valve 10, a pair of cylinders 13a and 13b provided on both sides of a partition 11 has pistons 14a and 13a, respectively.
14b is reciprocally slidably inserted into the pistons 14b.
The rods 12 a and 14 b are airtightly penetrated by the partition 11.
In the two cylinders 13a and 13b, pressure-increasing chambers 15a and 15b and drive chambers 16a and 16b are respectively formed inside and outside the cylinders 13a and 13b. The partition 11 communicates with the air source P, and the pressure increasing chambers 15a,
15b, an inlet port 1a for introducing air, a driving chamber 16
a, an outlet port 1c for outputting pressurized air, and an exhaust port 1d for discharging exhaust air into the atmosphere. An inlet check valve 17a, a pair of outlet check valves 17b, and a switching valve 18 are incorporated.

The pair of inlet check valves 17a and the pair of outlet check valves 17b are in communication with each other.
The pair of inlet check valves 17a allow only air to flow into the pressure-intensifying chambers 15a, 15b, and the pair of outlet check valves 17a.
b allows only outflow of air from the booster chambers 15a and 15b. However, if an air pressure difference occurs between the booster chambers 15a and 15b, the inflow of air to the higher air pressure is prevented.
The outflow of air from the lower air pressure is prevented.

The switching valve 18 switches the flow path so that air is supplied to one of the driving chambers 16a and 16b and air is discharged from the other, and push rods 18a and 18b for switching the flow path are provided. The push rods 18a and 18b are projected into the pressure-intensifying chambers 15a and 15b, respectively, and the reciprocating pistons 14a and 14b press the push rods 18a and 18b near the end of the stroke, thereby causing the switching valve 18 to move. The communication between the ports is switched so that the drive chambers 16a and 16b alternately communicate with the air inlet port 1b and the exhaust port 1d.

In the second pressure increasing valve 20, the partition 21 has an inlet port 2a, an outlet port 2b and an exhaust port 2c, and a pair of cylinders 23 provided on both sides of the partition 21.
The pistons 24a and 24b are reciprocally slidable through the pistons 21a and 23b.
The cylinders 23a and 23b are connected to each other by a rod 22 which is passed through the cylinders 23a and 23b in a pressure-tight manner inside and outside the pressure increase chambers 25a and 25b and the driving chambers 26a and 26a.
b are formed separately, and a pair of inlet check valves 27a, a pair of outlet check valves 27b, and a switching valve 28 are incorporated in the air flow path formed in the partition 21.

The pair of inlet check valves 27a and the pair of outlet check valves 27b are in communication with each other.
The pair of inlet check valves 27a allow only air to flow into the pressure-intensifying chambers 25a, 25b, and the pair of outlet check valves 27a.
b allows only the outflow of air from the pressure intensifying chambers 25a and 25b. However, if an air pressure difference occurs in the pressure intensifying chambers 25a and 25b, the inflow of air to the higher air pressure is prevented.
The outflow of air from the lower air pressure is prevented.

The switching valve 28 switches the flow path so that air is supplied to one of the driving chambers 26a and 26b and the air is discharged from the other, and push rods 28a and 28b for switching the flow path are provided. These push rods 28a and 28b are projected into the pressure-intensifying chambers 25a and 25b, respectively, and the reciprocating pistons 24a and 24b press the push rods 28a and 28b near the end of the stroke, so that the switching valve 28 The communication between the ports is switched so that the drive chambers 26a and 26b alternately communicate with the air inlet port 2a and the exhaust port 2c.

The outlet port 1c of the first pressure increasing valve 10 and the second
Port 2a of the pressure intensifier valve 20 and the first pressure intensifier valve 10
Inlet port 1b and the exhaust port 2c of the second pressure increasing valve 20
And the driving chamber 26 of the second pressure increasing valve 20
a, 26b is supplied to the drive chamber 1 of the first pressure increasing valve 10.
6a and 16b, and is used as a drive source for the pistons 14a and 14b of the first pressure-intensifying valve 10. In the figure, reference numeral 29 denotes a governor for controlling and maintaining the output pressure of the outlet port 2b at a constant pressure.

Since the pressure intensifier is configured as described above, first, air from the air source P flows into the pressure intensifying chambers 15a and 15b from the inlet port 1a of the first pressure intensifying valve 10.
At this time, no air is supplied to the drive chambers 16a or 16b, so that the air that has flowed into the booster chambers 15a and 15b is introduced into the drive chamber 26b via the inlet port 2a of the second booster valve 20, and It flows into the pressure intensifying chambers 25a and 25b. Accordingly, the pistons 24a and 24b start to be driven rightward in the drawing by the combined force of the force acting on the piston 24b in the driving chamber 26b and the force acting on the piston 24a in the pressure increasing chamber 25a. 2
5b is compressed to increase the pressure, and the outlet check valve 27b
Through the outlet port 2b.

The pistons 24a and 24b and the rod 22
Reaches the right end, the pressure in the pressure increasing chamber 25b is increased and output from the outlet port 2b is completed, and the switching valve 28 is switched so that the driving chamber 26a communicates with the inlet port 2a. At the same time, the driving chamber 26b is exhausted. The first pressure increasing valve 10 is communicated with the inlet port 1b via the port 2c. From this state, the pistons 24a and 24b start driving to the left in the drawing by the combined force of the force acting on the piston 24a in the drive chamber 26a and the force acting on the piston 24b in the pressure-intensifying chamber 25b. The air in the pressure chamber 25a is compressed to increase the pressure, and is output from the outlet port 2b through the outlet check valve 27b. At the same time, the exhaust air in the drive chamber 26b is introduced into the inlet port 1b of the first pressure increasing valve 10, and the first pressure is increased. It is introduced into the drive chamber 16b of the pressure valve 10.

The pistons 14a and 14b are formed by the combined force of the force acting on the piston 14b in the driving chamber 16b and the force acting on the piston 14a in the pressure increasing chamber 15a by the air from the air source P and the exhaust air introduced. The drive to the right is started, whereby the air in the pressure increasing chamber 15b is compressed to increase the pressure, and is output from the outlet port 1c to the second pressure increasing valve 20 through the outlet check valve 17b. When the pistons 14a, 14b and the rod 12 reach the right end, the pressure in the pressure increasing chamber 15b is increased and output from the outlet port 1c is completed, and the switching valve 18 is switched to connect the driving chamber 16a to the inlet port 1b. At the same time, the driving room 16b
Is released to the atmosphere via the exhaust port 1d, the pistons 14a and 14b
4a and the piston 14 in the booster chamber 15b
The drive to the left side in the figure is started by the resultant force with the force acting on the pressure increase chamber b, whereby the air in the pressure intensifying chamber 15a is compressed and increased in pressure. The output and the air in the drive chamber 16b are exhausted to the atmosphere from the exhaust port 1d. Such an operation is repeatedly performed, and the air pressure increased by the first pressure increasing valve 10 is further increased by the second pressure increasing valve 20 and output.

As described above, according to the pressure increasing device of the present embodiment, the exhaust air of the second pressure increasing valve 20 is supplied to the first pressure increasing valve 1.
The piston 14 is introduced into the drive chambers 16a and 16b
Since it is reused for driving the a and b, the consumption of air from the air source P is reduced, the power consumption can be reduced, and the cost can be reduced.

Although the pressure booster according to the embodiment of the present invention has been described in detail above, the present invention is not limited to the pressure booster according to the above embodiment, and is described in the claims of the present invention. Various changes can be made in the design without departing from the spirit of the claimed invention. For example, the pressure intensifier of the above embodiment includes two pressure intensifier valves 10 and 20 connected in series. However, if three or more pressure intensifier valves are connected in series, the air consumption increases. Without
The pressure increasing effect can be further improved.

[0019]

As can be understood from the above description, in the pressure increasing device of the present invention, the air pressure increased by the upstream pressure increasing valve is further increased by the downstream pressure increasing valve. Exhaust air discharged from the pressure booster valve is reused for driving the upstream pressure booster valve, thereby reducing air consumption and improving the pressure boosting effect at low cost without increasing power consumption. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a pressure intensifier according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a pressure intensifier according to an embodiment of the present invention.

[Explanation of symbols]

 1a, 1b, 2a Inlet port 1c, 2b Outlet port 1d, 2c Exhaust port 10 First pressure intensifier valve 11, 21 Partition wall 13a, 13b, 23a, 23b Cylinder 14a, 14b, 24a, 24b Piston 15a, 15b, 25a, 25b Pressure increase chambers 16a, 16b, 26a, 26b Drive chambers 17a, 27a Inlet check valves 17b, 27b Outlet check valves 18, 28 Switching valves 20 Second pressure increase valve P Air source

Claims (1)

[Claims] A pair of cylinders provided so as to sandwich a partition having an inlet port for introducing air, an outlet port for outputting pressurized air, and an exhaust port for discharging exhaust air; Reciprocating at the same time and connected by a rod penetrating the partition wall in an airtight state.
A pair of pistons and the partition wall from the inlet port to the 1
An inlet check valve that allows only the inflow of air into each booster chamber inside the pair of pistons, and an outlet check valve that allows only the inflow of air from each of the booster chambers to the outlet port,
A pressure-intensifier in which a plurality of pressure-intensifying valves including a switching valve that switches each of the driving chambers outside the pair of pistons to the inlet port and the exhaust port to communicate therewith is connected in series to an air source, The outlet port of the pressure booster valve on the upstream side communicates with the inlet port of the pressure booster valve on the downstream side, and the inlet port of the pressure booster valve on the upstream side communicates with the exhaust port of the pressure booster valve on the downstream side. The exhaust air of the drive chamber of the booster valve on the side is introduced into the drive chamber of the booster valve on the upstream side, and the exhaust air of the booster valve on the downstream side is used as a drive source of the booster valve on the upstream side. Pressure intensifier.