KR101366382B1 - Pressure regulating amplifier - Google Patents

Abstract

The present invention relates to a pressure regulating amplifier, which controls a pressure booster and has a pressure regulating valve. The pressure booster includes a first port on one side of a first cylinder room; a second port on one side of a second cylinder room; a third port on the other side of the first cylinder room; and a fourth port on the other side of the second cylinder room. Being connected to the pressure booster, the pressure regulating valve supplies a pressured fluid to a controlling device at a certain pressure regardless of a load flux as well as changes in supplying pressure and loads and includes the main body of the pressure regulating valve, the spool of the pressure regulating valve, and a pressure-adding inlet. The main body of the pressure regulating valve includes a first side port connected to the second port; a second side port connected to the fourth port and supplying a certain amount of pressure to the controlling device; and a back pressure port connected to the second side port and creating back pressure. The pressure regulating valve spool works in the main body of the pressure regulating valve. The pressure-adding inlet adds a set amount of pressure to the pressure regulating valve spool. The pressure regulating amplifier with this structure has the effect of maintaining increased pressure at a certain level despite changes in supplying pressure and loads.

Description

Pressure Regulating Amplifier

The present invention relates to a pressure regulating amplifier device, and more particularly, to a pressure regulating amplifier device that maintains the boosted pressure constant even when there is or no load flow rate of the pressure booster and even when the supply pressure and external load change. will be.

The pressure booster installs a freely displaced piston inside the cylinder, and the piston is displaced according to the action of the pressure fluid supplied to the operating chamber of the cylinder, so that the pressure fluid in the pressure increasing chamber formed on the opposite side to the piston against the piston increases in pressure As a result, the outlet pressure is increased to be supplied to the driving device, and the pressure fluid is discharged from the outlet through the check valve. There are a single-acting pressure booster and a double-acting pressure booster.

The single-acting pressure booster 10 is a booster which alternately repeats the inflow / outflow of the pressure fluid in two cycles, and as shown in FIG. 1, a driving chamber 11a is formed at one side and a booster chamber 11b is formed at the other side. (11), a drive piston (12) operating in the drive chamber (11a), and a booster piston (13) operating in the booster chamber (11b), and the drive piston (12) and the booster piston (13) are pistons. It is the configuration connected by the rod 14. In the single-acting pressure booster 10, a control valve V1 for controlling the inflow and outflow direction of the fluid is connected to both ports of the drive chamber 11a, and the boosted pressure fluid is supplied to the drive device F. A plurality (two) check valves V2 for supplying and controlling the suction direction of the pressure fluid in the tank T are connected to the port of the booster chamber 11b.

The double-acting pressure booster 20 is a booster that alternately repeats the inflow / outflow of the pressure fluid in one cycle, and as shown in FIG. (21), a drive piston (22) operating in the drive chamber (21a), and a booster piston (23) operating in the booster chamber (21b), and the booster piston (23) has both side surfaces of the drive piston (22). Protruding from the configuration. In the double-acting pressure booster 20, a control valve V1 for controlling the inflow and outflow direction of the fluid is connected to both ports of the drive chamber 21a, and the boosted pressure fluid is supplied to the drive device F. A plurality (four) check valves V2 for supplying and controlling the suction direction of the pressure fluid in the tank T are connected to the port of the booster chamber 21b.

However, the conventional pressure booster has a problem in that when the supply pressure or the external load is changed, the boosted pressure is also changed to maintain the elevated pressure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to adjust the pressure to adjust the pressure to maintain a constant pressure even when there is or no load flow rate and even if the supply pressure and external load change To provide an adjustable amplifier mechanism.

Pressure control amplifier according to the present invention for achieving the above object is a first port formed on one side of the first cylinder chamber, a second port formed on one side of the second cylinder chamber, the third formed on the other side of the first cylinder chamber A pressure regulating amplifier mechanism for controlling a pressure booster having a port and a fourth port formed on the other side of the second cylinder chamber, the pressure adjusting amplifier device being connected to the pressure booster to supply the boosted fluid to a constant pressure regardless of the supply pressure and the load variation. A pressure regulating valve for supplying a drive device; The pressure regulating valve has a pressure having a primary side port connected to the second port, a secondary side port communicating with the fourth port to supply a constant pressure to the drive unit, and a back pressure port connected to the secondary side port to form back pressure. A control valve body; A pressure regulating valve spool operating within the pressure regulating valve body; A pressure regulating pressure port for applying a set pressure to the pressure regulating valve spool; The fourth port is connected to the drive.

The secondary port communicates with the fourth port through the other side of the second cylinder chamber.

The pressure regulating valve includes: a pressure regulating valve body having a primary port connected to a second port, a secondary port connected to a driving device to supply a constant pressure, and a back pressure port connected to the secondary port to form a back pressure; ; A pressure regulating valve spool operating within the pressure regulating valve body; Pressure regulating pressure port for applying a set pressure to the pressure control valve spool, the second port and the fourth port may be in communication.

The fourth port communicates with one side of the second cylinder chamber via the pressure connecting tube, and the second port communicates with the pressure connector with one side of the second cylinder chamber. An orifice is formed in the middle of the pressure connector.

The pressure adjusting pressure port is composed of spring and adjusting screw to adjust the set pressure. The pressure regulating valve spool has two land portions connected by one spool rod portion. The secondary port and the back pressure port communicate with each other through the orifice.

In addition, the pressure regulating amplifier device according to the present invention comprises a first port formed on one side of the first cylinder chamber, a second port formed on one side of the second cylinder chamber, a third port formed on the other side of the first cylinder chamber, A pressure regulating amplifier device for controlling a pressure booster having a fourth port formed on the other side of a two-cylinder chamber, comprising: a main control valve connected to the pressure booster to open and close the first to fourth ports, and a pressure booster connected to the main control valve. A pressure regulating valve for supplying the pressure-increased fluid to the drive device at a constant pressure regardless of the supply pressure and the load variation; The main control valve has a first valve body having two connecting ports connected to the first port and the second port, and a drive port connected to the pressure regulating valve, and two connected to the third port and the fourth port. A second valve body integrally formed with the first valve body and having a drive port for forming a back pressure in the pressure booster, a first spool operating in the first valve body, and in the second valve body. A second spool operating at and integrally formed with the first spool; The pressure regulating valve is a pressure having a primary port connected to the drive port of the first valve body, a secondary port connected to the drive device to supply a constant pressure, and a back pressure port connected to the secondary port to form a back pressure A control valve body; A pressure regulating valve spool operating within the pressure regulating valve body; A pressure regulating pressure port for applying a set pressure to the pressure regulating valve spool, the back pressure port is connected to the drive port of the second valve body through the back pressure connector.

The driving port of the first valve body and the primary port of the pressure regulating valve body are connected via an orifice. The secondary port and the back pressure port of the pressure regulating valve body are connected via the orifice.

According to the pressure regulating amplifier device according to the present invention, a pressure regulating valve is connected to a pressure booster having four ports, so that the boosted pressure is maintained even when there is no load flow rate and even when the supply pressure and external load change. It is effective to maintain a desired boost ratio by adjusting to maintain a constant.

1 is a configuration diagram showing a control device to which a general single acting pressure booster is coupled.
Figure 2 is a block diagram showing a control device combined with a general double acting pressure booster.
3 is a block diagram showing a pressure control amplifier according to a first embodiment of the present invention.
Figure 4 is a block diagram showing a pressure regulation amplifier mechanism according to a second embodiment of the present invention.
5 is a configuration diagram showing a pressure regulation amplifier mechanism according to a third embodiment of the present invention.
6A and 6B are operational state diagrams of the pressure regulation amplifier mechanism according to the third embodiment of the present invention.
Figure 7 is a block diagram showing a pressure regulation amplifier mechanism according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

3 is a block diagram showing a pressure control amplifier according to a first embodiment of the present invention. The pressure regulating amplifier device of the first embodiment is an embodiment for a load flow stationary state where no flow rate is required and only a pressure-regulated pressure regulation is required. As shown, the control mechanism according to the first embodiment of the present invention is a pressure regulating amplifier mechanism for controlling the pressure booster 40 and includes a pressure regulating valve 100 connected to the pressure booster 40.

The pressure booster 40 includes a cylinder 41 having a first cylinder chamber 41a formed at one side and a second cylinder chamber 41b formed at the other side thereof, and a first piston 42 operating in the first cylinder chamber 41a. ) And a piston rod (44) which integrally connects the first piston (42) and the second piston (43) to operate in the second cylinder chamber (41b). One side (first piston side) of the first cylinder chamber 41a is formed with a first port 41c connected to a hydraulic source (not shown), and one side (second piston side) of the second cylinder chamber 41b. A second port 41d connected to the primary side port of the pressure regulating valve 100, which will be described later, is formed therein, and on the other side (piston rod side) of the first cylinder chamber 41a, a third fluid returning the pressure fluid to the tank is provided. A port 41e is formed, and a fourth port 41f connected to the driving device (not shown) is formed on the other side (piston rod side) of the second cylinder chamber 41b. The fourth port 41f is connected to the driving device through the driving connecting pipe U10.

The pressure regulating valve 100 is a valve connected to the pressure booster 40 to supply the boosted fluid to the driving device at a constant pressure regardless of the load fluctuation. The pressure regulating valve body 110 and the pressure regulating valve spool 120 ), And the pressure port 130.

The pressure regulating valve body 110 communicates with the primary port M1 connected to the second port 41d of the pressure booster 40 and the fourth port 41f of the pressure booster 40 to drive the device. Secondary port M2 for supplying a constant pressure, and a back pressure port M3 connected to the secondary port M2 to form a back pressure. The primary port M1 is connected to the second port 41d via the pressure input connector N10. The secondary port M2 is connected to the other side (piston rod side) of the second cylinder chamber 41b via the pressure output connector Q10 and communicates with the fourth port 41f, and the pressure output connector Q10. Is connected to the back pressure port (M3) through the back pressure connector (S10) via the orifice (O). The back pressure port M3 applies back pressure at the left end of the land portion 121 of the pressure regulating valve spool 120. The air outlet 111 is formed in the pressure control valve body 110 so that the space in which the pressure control pressure port 130 operates is exposed to atmospheric pressure.

The pressure regulating valve spool 120 operates in the pressure regulating valve body 110 and has two structures in which two land parts 121 and 122 are connected by one spool rod part 123. The land portion 121 opens and closes the secondary port M2. In the steady state, the land portion 121 opens the secondary port M2. The primary port M1 is always open regardless of the movement of the pressure regulating valve spool 120.

The pressure adjustment pressure port 130 may apply or adjust the set pressure to the pressure control valve spool 120 from the outside, is installed in close contact with the right end of the land portion 122. Pressure control pressure port 130 is made of a spring and the adjustment screw 131, but can be used a variety of pressure ports that can be adjusted, such as a proportional control solenoid.

On the other hand, in the pressure regulation amplifier device according to the first embodiment of the present invention, the driving connector (U10) or the pressure output connector (Q10) may be provided with an accumulator (AC: Accumulator) that acts as a buffer for surge pressure have. In this embodiment, the accumulator AC is provided in the drive connecting pipe U10.

In the pressure regulating amplifier device according to the first embodiment of the present invention configured as described above, one side (left side) of the first cylinder chamber 41a from the fluid source (not shown) through the first port 41c of the pressure booster 40. ) Flows into the space (left space of the first piston), and moves the piston assembly (the first piston and the second piston and the piston rod) 42, 43, 44 of the pressure booster 40 to the right. At the same time, the fluid in one side (right) space (right space of the second piston) of the second cylinder chamber 41b passes through the pressure control valve 100 to the other (left) space of the second cylinder chamber 41b. And a fluid at a pressure increased in the fourth port 41f through the drive connecting pipe U10 at the fourth port 41f, and is supplied to the drive device (not shown).

At this time, according to the change in the fluid pressure supplied to the booster 40, the fluid pressure input to the pressure regulating valve 100 through the pressure input connecting pipe (N10) is changed, so that the fluid pressure of the drive connecting pipe (U10) pressure control When the pressure is higher than the set pressure of the pressure port 130 of the valve 100, the back pressure is applied to the pressure regulating valve spool 120 through the back pressure port M3, so that the pressure regulating valve spool 120 moves to the right and the secondary side port ( M2) will be blocked. On the other hand, if the fluid pressure of the drive connecting pipe (U10) output from the booster in accordance with the change in the drive load is lower than the set pressure of the pressure port 130 of the pressure control valve 100, by the pressure of the pressure port 130 The pressure control valve spool 120 is moved to the left again to open the secondary port (M2). Thus, it is possible to amplify and maintain a constant pressure despite variations in supply pressure and load.

Figure 4 is a block diagram showing a pressure regulation amplifier mechanism according to a second embodiment of the present invention. Similar to the first embodiment, the pressure regulating amplifier device of the second embodiment is also an embodiment for a load flow stationary state in which a flow rate is unnecessary and only a pressure-regulated booster is required. As shown, the control mechanism according to the second embodiment of the present invention is a pressure regulating amplifier mechanism for controlling the pressure booster 50 and includes a pressure regulating valve 200 connected to the pressure booster 50. The second embodiment of the present invention can be applied to various types of boosters as well as a symmetric double reciprocating booster (SRB).

The pressure booster 50 includes a cylinder 51 having a first cylinder chamber 51a formed at one side and a second cylinder chamber 51b formed at the other side thereof, and a first piston 52 operating in the first cylinder chamber 51a. ) And a piston rod (54) which integrally connects the first piston (52) and the second piston (53) to operate in the second cylinder chamber (51b). One side (first piston side) of the first cylinder chamber 51a is formed with a first port 51c connected to a hydraulic source (not shown), and one side (second piston side) of the second cylinder chamber 51b. A second port 51d connected to the primary side port of the pressure regulating valve 200 to be described later is formed therein, and on the other side (piston rod side) of the first cylinder chamber 51a, a third to return the pressure fluid to the tank A port 51e is formed, and a fourth port 51f communicating with the second port 51d is formed on the other side (piston rod side) of the second cylinder chamber 51b. The fourth port 51f communicates with one side of the second cylinder chamber 51b through the pressure connecting tube U20, and the second port 51d communicates with the pressure connecting tube (1) through one side of the second cylinder chamber 51b. U20). An orifice O is formed in the middle of the pressure connecting tube U20.

The pressure regulating valve 200 is a valve connected to the pressure booster 50 to supply the boosted fluid to the driving device at a constant pressure regardless of the load fluctuation. The pressure regulating valve body 210 and the pressure regulating valve spool 220 ), And the pressing port 230.

The pressure control valve body 210 has a primary port M1 connected to the second port 51d of the pressure booster 50 and a secondary port M2 connected to a driving device (not shown) to supply a predetermined pressure. ) And a back pressure port M3 connected to the secondary side port M2 to form a back pressure. The primary port M1 is connected to the second port 51d via the pressure input connector N20. The secondary port M2 is connected to the driving device through the drive output connector Q20, and the drive output connector Q20 is connected to the back pressure port M3 through the back pressure connector S20 via the orifice O. Leads to. The back pressure port M3 applies back pressure at the left end of the land portion 221 of the pressure regulating valve spool 220. The air inlet 211 is formed in the pressure control valve body 210 so that the space in which the pressure port 230 operates is exposed to atmospheric pressure.

The pressure regulating valve spool 220 operates in the pressure regulating valve body 210 and has two structures in which two land parts 221 and 222 are connected by one spool rod part 223. The land portion 221 opens and closes the secondary port M2. In the steady state, the land portion 221 opens the secondary port M2. The primary port M1 is always open regardless of the movement of the pressure regulating valve spool 220.

The pressure adjusting pressure port 230 may apply or adjust the set pressure to the pressure control valve spool 220 from the outside, and is installed in close contact with the right end of the land portion 222. The pressure adjusting pressure port 230 is made of a spring and an adjustment screw 231, but various pressure ports that can be adjusted, such as a proportional control solenoid, may be used.

On the other hand, in the pressure regulation amplifier device according to the second embodiment of the present invention, the pressure input connector (N20) or the drive output connector (Q20) is provided with an accumulator (AC: Accumulator) that acts as a buffer for surge pressure Can be. In this embodiment, the accumulator AC is provided in the drive output connector Q20.

In the pressure regulating amplifier device according to the second embodiment of the present invention configured as described above, one side (left side) of the first cylinder chamber 51a from the fluid source (not shown) through the first port 51c of the pressure booster 50. ) Flows into the space (left space of the first piston) and moves the piston assembly (first piston, second piston and piston rod) 52, 53, 54 of the pressure booster 50 to the right. At the same time, the fluid in one side (right) space (right space of the second piston) of the second cylinder chamber 51b is boosted and the pressure regulating valve 200 is provided through the pressure input connector N20 at the second port 51d. Is supplied to the drive (not shown) via

At this time, the fluid pressure input to the pressure regulating valve 200 through the pressure input connector (N20) is changed according to the change of the fluid sum supplied to the booster 50, the fluid pressure of the drive output connector (Q20) pressure control When the pressure is higher than the set pressure of the pressure port 230 of the valve 200, the back pressure is applied to the pressure regulating valve spool 220 through the back pressure port M3, so that the pressure regulating valve spool 220 moves to the right and the secondary port ( M2) will be blocked. On the other hand, if the fluid pressure of the drive output connector (Q20) output from the booster is lower than the set pressure of the pressure port 230 of the pressure control valve 200 in response to the change in the drive device load, the pressure of the pressure port (230) By the pressure control valve spool 220 is moved to the left again to open the secondary port (M2). Thus, it is possible to amplify and maintain a constant pressure despite variations in supply pressure and load.

5 is a configuration diagram showing a pressure regulation amplifier mechanism according to a third embodiment of the present invention. The pressure regulating amplifier device of the third embodiment is an embodiment for load flow continuous flow applied to a double-acting reciprocating pressure booster while maintaining a constant pressure boost while the flow rate is continuously supplied. As shown, the control mechanism according to the third embodiment of the present invention is a pressure regulating amplifier mechanism for controlling the pressure booster 60, and the main control valve 300 connected to the pressure booster 60 and the main control valve 300. It is provided with a pressure control valve 400 connected to.

The pressure booster 60 includes a cylinder 61 having a first cylinder chamber 61a formed at one side and a second cylinder chamber 61b formed at the other side, and a first piston 62 operating in the first cylinder chamber 61a. ) And a piston rod 64 integrally connecting the first piston 62 and the second piston 63 to the second piston 63 operating in the second cylinder chamber 61b. A first port 61c is formed on one side (first piston side) of the first cylinder chamber 61a, and a second port 61d is formed on one side (second piston side) of the second cylinder chamber 61b. The third port 61e is formed on the other side (piston rod side) of the first cylinder chamber 61a, and the fourth port 61f is formed on the other side (piston rod side) of the second cylinder chamber 61b. do.

The main control valve 300 is connected to the double acting reciprocating pressure booster 60 to open and close the first to fourth ports 61c to 61f, and includes a first valve body 310 and a second valve body 320. ), A first spool 330, and a second spool 340.

The first valve body 310 and the second valve body 320 are connected and integrated through the connecting passage 301, and the first spool 330 is formed at an end (inner side) of the first valve body 310. An operating spring 302 for operating the spool (the first spool and the second spool) by applying an elastic restoring force in contact with the upper surface of the second valve body 320 is provided. In addition, an electromagnet 303 is installed to operate the spool (first spool and second spool). An electromagnet is installed on the first valve body 310, and an operating spring may be installed on the second valve body 320. In addition, both the first valve body 310 and the second valve body 320 may be installed to operate the electromagnet.

In the first valve body 310, a connection port (port A) A connected to the first port 61c through the booster connector D31 forms a concave space on the inner surface of the first valve body 310. On the other hand, the connection port (B port) (B) connected to the second port (61d) via the booster connector (D32) is formed to form a concave space on the inner surface of the first valve body (310). In addition, the first valve body 310 has a supply port (P port) (P) for supplying fluid from a fluid supply source (not shown) through a supply connection pipe (E30) in the concave space on the inner surface of the first valve body (310) On the other hand, two driving ports (C ports) C1 and C2 for supplying the pressure-increased fluid from the pressure booster to the driving device through the driving connecting pipe F30 to the driving device are formed. . Five ports are formed in the first valve body 310.

In the second valve body 320, a connection port (Xa port) Xa connected to the third port 61e through the booster connector D33 forms a concave space on the inner surface of the second valve body 320. On the other hand, the connection port (Xb port) (Xb) connected to the fourth port 66f through the booster connector (D34) is formed to form a concave space on the inner surface of the second valve body (320). In addition, the second valve body 320 has two return ports (R ports) R1 and R2 for returning the fluid to the tank 304 through the return connection pipe G30 to the inner surface of the second valve body 320. While being formed in the concave space, one driving port (C port) (C3) is connected to the back pressure connecting pipe (S30) to be described later to form a back pressure in the pressure control valve (400). Two return ports R1 and R2 are connected via a return connector G30. Five ports are formed in the second valve body 320.

The first spool 330 and the second spool 340 are connected and integrated through the spool connecting rod 305. The spool connecting rod part 305 is connected through the inside of the connection passage part 301. The first spool 330 forms a 5-port 3-position valve together with the first valve body 310, and the second spool 340 forms a 5-port 3-position valve together with the second valve body 320. The first spool may form a 5-port 2-position valve or a 4-port 2-position valve with the first valve body and the second spool may form a 5-port 2-position valve or a 4- It is possible.

The first spool 330 operates in the first valve body 310 and has three land parts 331, 332, and 333 connected by two spool rod parts 334 and 335. The land portion 331 opens and closes the driving port C1, the land portion 332 opens and closes the supply port P, and the land portion 333 opens and closes the driving port C2. The spool rod part 334 connects the land part 331 and the land part 332, and the spool rod part 335 connects the land part 332 and the land part 333.

The second spool 340 operates in the second valve body 320 and has two structures in which two land portions 341 and 342 are connected by one spool rod portion 343. Land portion 341 opens and closes connection port Xa, and land portion 342 opens and closes connection port Xb. The spool rod portion 343 connects the land portion 341 and the land portion 342.

5, the land parts 331, 332, and 333 of the first spool 330 close the supply port P and the driving ports C1 and C2, and the land parts 341 and 342 of the second spool 340. Indicates a neutral position where the fluid is not supplied to the first port 61c or the second port 61d of the pressure booster 60.

The pressure control valve 400 is connected to the main control valve 300 to supply the fluid boosted by the pressure booster 60 to the drive device at a constant pressure regardless of the load fluctuation, the pressure control valve body 410, And a pressure regulating valve spool 420 and a pressure adjusting pressure port 430.

The pressure regulating valve body 410 has a primary port M1 connected to the drive port C2 of the first valve body 310 and a secondary port connected to a drive device (not shown) to supply a predetermined pressure ( M2) and a back pressure port M3 connected to the secondary side port M2 to form a back pressure. The primary port M1 is connected to the drive connector F30 via the drive input connector N30 via the orifice O. The secondary side port M2 is connected to the driving device through the drive output connector Q30, and the drive output connector Q30 is connected to the back pressure port M3 via the orifice O through the back pressure connector S30. On the other hand, the back pressure connecting pipe (S30) is connected to the drive port (C3) of the second valve body (320). The back pressure port M3 applies back pressure at the left end of the land portion 421 of the pressure regulating valve spool 420. An air inlet 411 is formed in the pressure control valve body 410 such that a space in which the pressure control pressure port 430 operates is exposed to atmospheric pressure.

On the other hand, in the pressure regulation amplifier device according to the third embodiment of the present invention, the driving connector (F30) or the back pressure connector (S30) may be provided with an accumulator (AC: Accumulator) that acts as a buffer for surge pressure. . In this embodiment, the accumulator AC is provided in the drive connecting pipe F30.

The operation of the pressure regulating amplifier mechanism according to the third embodiment of the present invention configured as described above will be described with reference to FIGS. 6A and 6B.

When the first spool 330 and the second spool 340 move to the right side according to the action of the operating spring 302 and the electromagnet 303 in the neutral position of FIG. 5, the supply port P as shown in FIG. 6A. ) Is in communication with the connection port A, the connection port B is in communication with the drive port C2, the connection port Xa is in communication with the return port R1, and the connection port Xb is the drive port ( C3) (hereinafter referred to as 'A position')

Thus, the fluid supplied from the fluid source (not shown) through the supply connection pipe E30 is connected to the supply port P and the connection port A, and passes the first port 61c beyond the booster connection D31. It flows into one side (left side) space (left space of a 1st piston) of the 1st cylinder chamber 61a, and the piston assembly (1st piston, 2nd piston, and piston rod) 62, 63, 64 to the right. Move it. At the same time, the fluid in one side (right) space (right space of the second piston) of the second cylinder chamber 61b flows out through the second port 61d and passes through the booster connecting pipe D32 to the connection port B. And a driving port C2, and are supplied to the driving device (not shown) through the pressure control valve 400 through the driving connecting pipe F30.

Meanwhile, the fluid in the other (right) space (right space of the first piston) of the first cylinder chamber 61a flows out through the third port 61e and passes through the booster connecting pipe D33 to the connection port Xa. To the return port R1 and discharged to the tank 304 through the return connector G30. At the same time, a part of the fluid supplied to the driving device through the pressure regulating valve 400 is returned through the back pressure connecting pipe S30 and passes through the booster connecting pipe D34 through the driving port C3 and the connecting port Xb. The other side (left) space (left space of the second piston) of the second cylinder chamber 61b is introduced through the fourth port 61f to apply back pressure to the second piston 63.

When the first spool 330 and the second spool 340 move to the left side according to the action of the operation spring 302 and the electromagnet 303 in the neutral position of FIG. 5, the supply port P as shown in FIG. 6B. ) Is in communication with the connection port (B), the connection port (A) is in communication with the drive port (C1), the connection port (Xa) is in communication with the drive port (C3), the connection port (Xb) is the return port ( R2) (hereinafter referred to as 'B position')

Accordingly, the fluid supplied from the fluid source (not shown) through the supply connection pipe E30 is connected to the supply port P and the connection port B, and passes through the booster connection D32 to the second port 61d. It flows into the one side (right side) space (right side space of the 2nd piston) of the 2nd cylinder chamber 61b, and the piston assembly (1st piston, 2nd piston, and piston rod) 62, 63, 64 to the left side. Move it. At the same time, the fluid in the one (left) space (the left space of the first piston) of the first cylinder chamber 61a flows out through the first port 61c and passes through the booster connector D31 to the connection port A. And a driving port C1, and are supplied to the driving device (not shown) through the pressure control valve 400 through the driving connecting pipe F30.

On the other hand, the fluid in the other (left) space (left space of the second piston) of the second cylinder chamber 61b flows out through the fourth port 61f and passes through the booster connecting pipe D34 to the connection port Xb. And return port R2, and is discharged to the tank 304 through the return connector (G30). At the same time, a part of the fluid supplied to the driving device through the pressure regulating valve 400 is returned through the back pressure connecting pipe S30 and passes through the booster connecting pipe D33 through the driving port C3 and the connecting port Xa. The other side (right) space of the first cylinder chamber 61a (the right space of the first piston) is introduced through the third port 61e to apply back pressure to the first piston 62.

In this way, the piston assembly of the pressure booster (first piston, second piston and piston rod) is supplied through the supply port P from the fluid source as the neutral position, A position and B position are repeated in the cylinder 61. The fluid is boosted through the pressure booster 60 to continuously drive the drive through the drive ports C1, C2.

At this time, when the fluid pressure is higher than the set pressure of the pressure adjusting pressure port 430 of the pressure control valve 400 according to the change of the drive load output through the drive connecting pipe (F30), the pressure through the back pressure port (M3) Back pressure is applied to the control valve spool 420 to move the pressure control valve spool 420 to the right to block the secondary port (M2). On the other hand, when the fluid pressure is lower than the set pressure of the pressure port 430 of the pressure control valve 400 according to the change in the supply pressure of the booster 60, the pressure control valve spool 420 is pressurized by the pressure port 430. Moving to the left again, the secondary port M2 is opened. Thus, it is possible to amplify and maintain a constant pressure despite variations in supply pressure and load.

7 is a configuration diagram showing a pressure regulation amplifier mechanism according to a fourth embodiment of the present invention. As illustrated, the control mechanism according to the fourth embodiment of the present invention is connected to the pressure booster 60 to open and close the first to fourth ports, and the main booster valve 500 is connected to the main booster valve 500. It is provided with a pressure control valve 600 for supplying the pressure-increased fluid at 60 to the drive device at a constant pressure regardless of the load fluctuation.

The main control valve 500 includes a first valve body 510 having two connection ports A and B to which booster connecting pipes D41 and D42 are connected, and a booster connecting pipe D43 and D44, respectively. A second valve body 520 integrally formed with the first valve body 510 and having a second connection port Xa (Xb) connected to each other, and a first operating in the first valve body 510. The spool 530 includes a second spool 540 which is operated in the second valve body 520 and integrally formed with the first spool 530.

The first valve body 510 is provided with a supply port (P port) P through which a fluid is supplied from a fluid source (not shown) through a supply connection pipe E40, while a pressure is supplied through the driving connection pipe F40. Two driving ports (C ports) C1 and C2 are provided to supply the fluid boosted by the booster to the driving device via the pressure regulating valve 500. Two drive ports C1 and C2 are connected via a drive connector F40. The second valve body 520 is formed with two return ports (R ports) R1 and R2 for returning the fluid to the tank 504 through the return connection pipe G40, while being driven through the orifice O. One drive port (C port) C3 is connected to the connection pipe F40 to form a back pressure in the pressure booster 60. The two return ports R1 and R2 are connected via a return connector G40.

The pressure regulating valve 600 is connected to the main control valve 500 to supply the fluid boosted by the pressure booster 60 to the drive device at a constant pressure regardless of the load fluctuation, the pressure regulating valve body 610, It includes a pressure control valve spool 620 and a pressure adjusting pressure port 630.

The pressure regulating valve body 610 is a primary port M1 connected to the drive port C2 of the first valve body 510 and a secondary port connected to a drive device (not shown) to supply a predetermined pressure ( M2) and a back pressure port M3 connected to the secondary side port M2 to form a back pressure. The primary port M1 is connected to the drive connector F40 via the drive input connector N40 via the orifice O. The secondary port M2 is connected to the driving device through the drive output connector Q40, and the drive output connector Q40 is connected to the back pressure port M3 via the back pressure connector S40 via the orifice O. Leads to. The back pressure port M3 applies back pressure at the left end of the pressure control valve spool 620.

On the other hand, in the pressure regulation amplifier device according to the fourth embodiment of the present invention, the drive connector (F40) or the drive output connector (Q40) may be provided with an accumulator (AC: Accumulator) that acts as a buffer for surge pressure have. In this embodiment, the accumulator AC is provided in the drive connecting pipe F40.

Since the rest of the configuration and operation of the fourth embodiment of the present invention is similar to the configuration and operation of the third embodiment (Figs. 5 to 6B), detailed description thereof will be omitted.

In an embodiment of the present invention, the first spool and the second spool of the main control valve may be configured to have two to six land portions. In the third and fourth embodiments of the present invention, the first spool has three land portions, and the second spool has two land portions.

In the pressure regulating amplifier device of the present invention, the double-acting reciprocating pressure booster 60 acts as a FA (flow amplifier) when the inlet and outlet are reversed. Can be used as an appliance. In addition, the pressure control amplifier device of the present invention may be provided with an accumulator (Accumulator) that serves as a buffer of surge pressure.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

40, 50, 60: pressure booster
61 cylinder 61a first cylinder chamber
61b: 2nd cylinder chamber 62: 1st piston
63: second piston 64: piston rod
61c: first port 61d: second port
61e: 3rd port 61f: 4th port
100, 200, 400, 600: Pressure regulating valve
110, 210: pressure regulating valve body 120, 220: pressure regulating valve spool
130, 230: pressure adjusting pressure port 131, 231: adjustment screw
300, 500: main valve 301: connecting passage
302: operating spring 303: electromagnet
304 tank 305 spool connecting rod
310: first valve body 320 second valve body
330: first spool 340: second spool
A, B, Xa, Xb: connection port C1, C2, C3, C4:
N10: Pressure input connector Q10: Pressure output connector
S10: back pressure connector U10: drive connector
D31, D32, D33, D34: Booster Connector
E30: supply connector F30: drive connector
G30: return connector
M1: Primary Port M2: Secondary Port
M3: Back pressure port O: Orifice
P: Supply port R1, R2: Return port

Claims (11)

A first port formed on one side of the first cylinder chamber, a second port formed on one side of the second cylinder chamber, a third port formed on the other side of the first cylinder chamber, and a second formed on the other side of the second cylinder chamber A pressure regulating amplifier mechanism for controlling a pressure booster having four ports,
And a pressure control valve connected to the pressure booster to supply the boosted fluid to the driving device at a constant pressure regardless of the load fluctuation.
The pressure regulating valve includes a primary side port connected to the second port, a secondary side port communicating with the fourth port to supply a predetermined pressure to the driving device, and a back pressure connected to the secondary side port to form a back pressure. A pressure regulating valve body having a port; A pressure regulating valve spool operating within the pressure regulating valve body; And a pressure adjusting pressure port configured to apply a set pressure to the pressure control valve spool;
And the fourth port is connected to the driving device. The method according to claim 1,
And the secondary port communicates with the fourth port through the other side of the second cylinder chamber. A first port formed on one side of the first cylinder chamber, a second port formed on one side of the second cylinder chamber, a third port formed on the other side of the first cylinder chamber, and a second formed on the other side of the second cylinder chamber A pressure regulating amplifier mechanism for controlling a pressure booster having four ports,
And a pressure control valve connected to the pressure booster to supply the boosted fluid to the driving device at a constant pressure regardless of the load fluctuation.
The pressure regulating valve has a pressure regulator including a primary port connected to a second port, a secondary port connected to the driving device to supply a predetermined pressure, and a back pressure port connected to the secondary port to form a back pressure A valve body; A pressure regulating valve spool operating within the pressure regulating valve body; It includes a pressure adjusting pressure port for applying a set pressure to the pressure control valve spool,
And the second port and the fourth port communicate with each other. The method of claim 3,
The fourth port communicates with one side of the second cylinder chamber through a pressure connecting tube, and the second port communicates with the pressure connecting tube through one side of the second cylinder chamber. . The method of claim 4,
Pressure regulator amplifier characterized in that the orifice is formed in the middle of the pressure connection pipe. The method according to claim 1 or 3,
The pressure adjusting pressure sphere is a pressure regulation amplifier mechanism characterized in that it comprises a spring and the adjustment screw. The method according to claim 1 or 3,
The pressure regulating valve spool is a pressure regulating amplifier characterized in that the two land portion is connected by one spool rod portion. The method according to claim 1 or 3,
And the secondary side port and the back pressure port communicate with each other via an orifice. A first port formed on one side of the first cylinder chamber, a second port formed on one side of the second cylinder chamber, a third port formed on the other side of the first cylinder chamber, and a second formed on the other side of the second cylinder chamber A pressure regulating amplifier mechanism for controlling a pressure booster having four ports,
A pressure control unit connected to the pressure booster to open and close the first to fourth ports, and a pressure control unit connected to the main control valve to supply the fluid boosted by the pressure booster to a driving device at a constant pressure regardless of load variation A valve;
The main control valve has a first valve body having two connection ports connected to the first port and the second port and a driving port connected to the pressure regulating valve, and the third port and the fourth port. A second valve body having two connection ports connected to the port and having a driving port for forming a back pressure in the pressure booster and integrally formed with the first valve body; A spool and a second spool which is operated in said second valve body and is integrally formed with said first spool;
The pressure regulating valve may include a primary port connected to a drive port of the first valve body, a secondary port connected to the drive device to supply a constant pressure, and a back pressure port connected to the secondary port to form a back pressure Pressure control valve body having a; A pressure regulating valve spool operating within the pressure regulating valve body; And a pressure adjusting pressure port for applying a set pressure to the pressure control valve spool;
And the back pressure port is connected to a driving port of the second valve body through a back pressure connecting pipe. The method of claim 9,
The drive port and the primary port of the first valve body is a pressure control amplifier characterized in that connected via the orifice. The method of claim 9,
And the secondary side port and the back pressure port are connected via an orifice.

Images