KR101497976B1 - Automatic reciprocating motion control device for reciprocatable double acting booster - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic reciprocating motion control mechanism for a double-acting reciprocating pressure booster, which is connected to a double-acting type reciprocating pressure booster and includes a main valve for opening and closing an input / output port and an exhaust backpressure port and a latch valve for operating a spool will be.
The main control valve includes a first valve body having two connection ports connected to the first input / output port and the second input / output port, and two connection ports connected to the first discharge back pressure port and the second discharge back pressure port, A second valve body integrally formed with the one valve body, a first spool operable in the first valve body, and a second spool operating in the second valve body and formed integrally with the first spool. The latch valve includes a latch valve body having an inlet port connected to a source of fluid and having a pressure port connected to the first valve body or the second valve body for applying pilot pressure and a latch valve spool And a valve operation connecting rod connected to the latch valve spool.
According to the automatic reciprocating motion control mechanism for a double-acting reciprocating pressure booster having such a configuration, it is possible to simplify the control construction and control flow path to facilitate assembly and installation of the double-acting reciprocating pressure booster, The reliability of the maintenance operation can be enhanced, the surge pressure can be reduced, and the booster can be automatically reciprocated only by its own power source without an external sensor or additional device.

Description

[0001] The present invention relates to an automatic reciprocating motion control device for reciprocating double acting booster,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control mechanism for a double-acting type reciprocating pressure booster, and more particularly, to a control mechanism for a double-acting type reciprocating pressure booster in which a piston is reciprocated while continuously introducing / To a self-reciprocating motion control mechanism for a double-acting reciprocating pressure booster.

The pressure booster is provided with a piston which is freely displaceable in the cylinder, so that the piston is displaced in response to the action of the pressure fluid supplied to the operating chamber of the cylinder, so that the pressure fluid in the compression chamber formed on the opposite side to the piston from the operating chamber, And the outlet pressure is increased to be supplied to the drive device, and the pressure fluid is discharged from the discharge port 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. As shown in FIG. 1, the booster 10 includes a cylinder 11a formed on one side thereof and a pressure- A driving piston 12 which operates in the driving chamber 11a and a pressure-increasing piston 13 which operates in the pressure-increasing chamber 11b. The driving piston 12 and the pressure- And connected by a rod 14. The single acting pressure booster 10 is provided with a control valve V1 for controlling the inflow and outflow directions of the fluid to be connected to both ports of the drive chamber 11a and to supply the pressurized pressure fluid to the drive device F (Two) check valves V2 for supplying the pressurized fluid to the tank T and controlling the suction direction of the pressure fluid in the tank T are connected to the ports of the booster chamber 11b.

The double acting type pressure booster 20 is a booster which alternately repeats the inflow / outflow of the pressure fluid in one cycle. As shown in FIG. 2, the booster 20 includes a cylinder 21a in the middle and a pressure increase chamber 21b on both sides. And a pressure-increasing piston 23 that operates in the pressure-increasing chamber 21b. The pressure-increasing piston 23 is connected to both sides of the drive piston 22, Respectively. The double acting pressure booster 20 is provided with a control valve V1 for controlling the inflow and outflow directions of the fluid to be connected to both ports of the drive chamber 21a and to supply the pressurized fluid to the drive device F (Four) check valves V2 for supplying the pressurized fluid to the tank T and controlling the suction direction of the pressure fluid in the tank T are connected to the port of the booster chamber 21b.

Such a single acting or double acting pressure booster suffers from a surge pressure during the change of direction and an outlet pressure fluctuates according to the change of load, and the double-acting pressure booster must have a long cylinder length. A reciprocatable double acting booster is disclosed in Korean Patent Publication No. 2008-0083603, Korean Patent No. 10-1028380, and the like to compensate for the disadvantage that the length becomes longer.

The double-acting type reciprocating booster 30 is a booster which alternately repeats the inflow / outflow of the pressure fluid in one cycle. As shown in FIG. 3, the first chamber 31a is provided at one side (see Korean Patent Publication No. 2008-0083603) A first piston 32 which is operated in the first chamber 31a and a second piston 33 which is operated in the second chamber 31b and in which a second chamber 31b is formed on the other side, The first piston 31 and the second chamber 31b are connected to each other by a piston rod 34. The first piston 31 and the second chamber 31b are connected to each other by a first piston 32, And a back pressure chamber in which the pressure fluid is supplied and discharged by the second piston (33) and the pressure fluid is changed in pressure to be discharged. A switching valve 40 for controlling the inflow and outflow directions of the fluid is provided in the drive chambers of the first chamber 31a and the second chamber 31b in the double-acting type reciprocating booster 30, (Four) check valves 50 for supplying the pressure fluid changed in the back pressure chambers of the first chamber 31a and the second chamber 31b to the drive apparatus and forming the back pressure in the back pressure chamber are provided.

However, since the valve for controlling the double-action type reciprocating booster 30 is divided into one directional control valve and a plurality of check valves, there are many control parts and the control configuration and control flow path are complicated, It is not easy to assemble and install the battery.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pressure booster which facilitates assembly and installation of a double-acting reciprocating pressure booster, And to provide an automatic reciprocating motion control mechanism for a double-acting reciprocating pressure booster, which improves the reliability of the valve position maintaining operation, reduces the surge pressure, and automatically reciprocates only by self-power without external sensors or devices.

To achieve the above object, the automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to the present invention comprises a first input / output port formed on one side of a first cylinder chamber, a second input / output port formed on one side of a second cylinder chamber , A first discharge back pressure port formed on the other side of the first cylinder chamber, and a second discharge back pressure port formed on the other side of the second cylinder chamber, the control mechanism controlling a double-acting type reciprocating pressure booster A main valve connected to the pressure booster for opening and closing the input / output port and exhaust backpressure port; a latch valve connected to the double-acting, reciprocating pressure booster and the main control valve for operating the spool of the main valve according to the piston position of the double- ; The main control valve includes a first valve body having two connection ports connected to the first input / output port and the second input / output port, and two connection ports connected to the first discharge back pressure port and the second discharge back pressure port, A second valve body integrally formed with the one valve body, a first spool operating in the first valve body, and a second spool operating in the second valve body and formed integrally with the first spool.

The latch valve includes an inlet port connected to a source of fluid, a latch valve body having a first valve body of the main valve or a latch valve outlet port connected to the second valve body for applying pilot pressure; A latch valve spool operable within the latch valve body; And a valve operation connecting rod connected to the latch valve spool. The valve operation connecting rod has a pressing pin portion protruding into the first cylinder chamber or the second cylinder chamber.

The latch valve body is formed with an outlet port for returning fluid to the tank. The latch valve outlet port communicates with a spool latch port that presses the latch valve spool to maintain the switching position of the valve.

The latch valve spool has two land portions connected by one spool rod portion.

The first valve body is formed with a supply port for supplying fluid from a fluid supply source, and the second valve body is formed with a return port for returning fluid to the tank. The return port is formed by one or two.

The first valve body and the second valve body are provided with a drive port for supplying the fluid pressurized by the double-acting reciprocating pressure booster to the drive unit or forming a back pressure in the double-acting reciprocating pressure booster. One or two driving ports are formed.

The first spool and the second spool include a land portion and a spool rod portion connecting the land portion, and the first spool and the second spool are connected and integrated by the spool connecting rod portion.

In the first spool, three land portions are connected by two spool rod portions, and the second spool is connected by two spool rod portions.

According to the automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to the present invention, a single control valve is connected to a double-acting reciprocating pressure booster having two input / output ports and two discharge backpressure ports, It is possible to simplify the construction and installation of the double-acting reciprocating pressure booster by simplifying the control flow path, improve the reliability of the direction of the booster and maintain the position of the control valve, and reduce the surge pressure. Further, when the direction of the main control valve is switched by the latch valve, there is an effect that the booster can be automatically reciprocated only by its own power without an external sensor or a separate additional device.

1 is a configuration diagram showing a control device to which a general single acting pressure booster is coupled.
2 is a block diagram showing a control device to which a general double acting pressure booster is coupled.
Fig. 3 is a configuration diagram showing a conventional double-acting type reciprocating pressure booster.
4 is a configuration diagram showing an automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to the first embodiment of the present invention.
5A and 5B are operational states of an automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to the first embodiment of the present invention.
6 is a configuration diagram showing an automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to a second 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.

4 is a configuration diagram showing an automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to the first embodiment of the present invention. The control device 100 according to the first embodiment of the present invention includes a main control valve 70 and a latch valve 80 as a control mechanism for controlling the double-acting type reciprocating pressure booster 60. As shown in Fig.

The double-acting type reciprocating pressure booster 60 includes a cylinder 61 in which a first cylinder chamber 61a is formed on one side and a second cylinder chamber 61b is formed on the other side and a cylinder 61a which operates in the first cylinder chamber 61a. A first piston 62 and a second piston 63 operating in the second cylinder chamber 61b and a piston rod 64 integrally connecting the first piston 62 and the second piston 63 . A first input / output port 65a is formed on one side (first piston side) of the first cylinder chamber 61a and a second input / output port 65b is formed on one side (second piston side) of the second cylinder chamber 61b. A first discharge back pressure port 66a is formed on the other side (piston rod side) of the first cylinder chamber 61a and a second discharge back pressure port 66b is formed on the other side (piston rod side) of the second cylinder chamber 61b. A port 66b is formed.

The main control valve 70 is a valve connected to the double-acting type reciprocating pressure booster 60 for opening and closing the first and second input / output ports 65a and 65b and the first and second discharge back pressure ports 66a and 66b, A valve body 110, a second valve body 120, a first spool 130, and a second spool 140.

The latch valve 80 is connected to the double-acting reciprocating pressure booster 60 and the main control valve 70 to actuate the spool of the main control valve 60 in accordance with the piston position of the double-acting reciprocating pressure booster 60 A latch valve body 150, a latch valve spool 160, and a direction switching valve operation connecting rod 170. The latch valve 80 is in the form of a three-port two-position valve, and the position of the valve is switched by the valve operation connecting rod 170 connected to the pressure booster 60. The switching position of the valve is controlled by a latch valve spring, Is held by the pressure of the latch port and serves to apply or release pressure to a pilot port, which will be described later, of the main controller valve 70 in accordance with the change of the position of the latch valve 80. [

The first valve body 110 and the second valve body 120 are integrally connected to each other through the connection passage portion 101. The first valve body 110 has a first spool 130, (Not shown) of the latch valve body 150 is provided at the other end of the first valve body 110. The first valve body 110 is provided with an operating spring 102 for applying an elastic restoring force to the spool A pilot port 103 connected to the outlet port for operating the first spool 130 and the second spool 140 by the pressure of the fluid is formed. The pilot port 103 may be formed in the second valve body 120.

A connection port (A port) A connected to the first input / output port 65a through the booster connection pipe D11 is formed in the first valve body 110 so as to form an inner space on the inner surface of the first valve body 110 And a connection port (B port) B connected to the second input / output port 65b through the booster connection pipe D12 is formed as an inner space on the inner surface of the first valve body 110. [ The first valve body 110 is also provided with a supply port (P port) P through which a fluid is supplied from a fluid supply source (not shown) through a supply connection pipe E10 to an inner space of the first valve body 110 Respectively. The first valve body 110 is provided with two driving ports C port (not shown) for supplying the fluid pressurized by the double-acting type reciprocating pressure booster 60 to the driving device (not shown) through the driving connection pipe F10 C1, and C2 are formed in the inner surface of the first valve body 110 as a recessed space. The two drive ports (C1) and (C2) are connected through a drive connection pipe (F10). Five ports are formed in the first valve body 110 except for the pilot port 103.

A connection port (Xa port) Xa connected to the first exhaust backpressure port 66a through the booster connection pipe D13 is formed in the second valve body 120 in the inner surface of the second valve body 120 And a connection port (Xb port) Xb connected to the second discharge back pressure port 66b through the booster connection pipe D14 is formed as an inner space of the inner surface of the second valve body 120 . In addition, two return ports (R ports) R1 and R2 for returning the fluid to the tank 104 through the return connection pipe G10 are formed in the second valve body 120 on the inner surface of the second valve body 120 And is formed as a recessed space. The second valve body 120 is connected to the driving connection pipe F10 through the orifice O so that the driving port C port C3 forming the back pressure is inserted into the inner surface of the second valve body 120 Space. Two return ports (R1) (R2) are connected via a return connection pipe (G10). Five ports are formed in the second valve body 120.

The first spool 130 and the second spool 140 are connected to each other through the spool connecting rod portion 105 to be integral with each other. The spool connecting rod portion 105 is connected through the inside of the connecting passage portion 101. The first spool 130 constitutes a five-port three-position valve together with the first valve body 110 and the second spool 140 constitutes a five-port three-position valve together with the second valve body 120. 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 130 operates in the first valve body 110 and the three land portions 131, 132 and 133 are connected by the two spool load portions 134 and 135. The land portion 131 closes the drive port C1 and the land portion 132 opens and closes the supply port P and the land portion 133 opens and closes the drive port C2. The spool rod portion 134 connects the land portion 131 and the land portion 132 and the spool rod portion 135 connects the land portion 132 and the land portion 133. [

The second spool 140 operates in the second valve body 120 and is structured such that the two land portions 141 and 142 are connected by one spool rod portion 143. The land portion 141 opens and closes the connection port Xa and the land portion 142 opens and closes the connection port Xb. The spool rod portion 143 connects the land portion 141 and the land portion 142.

4 shows a state in which the land portions 131, 132 and 133 of the first spool 130 close the supply port P and the drive ports C1 and C2 and the land portions 141 and 142 of the second spool 140 Represents a neutral position in which the connection ports Xa and Xb are closed and the fluid is not supplied to the first input / output port 65a or the second input / output port 65b of the double-action type reciprocating pressure booster 60 .

The latch valve body 150 is provided with a latch valve spring 106 which applies an elastic restoring force in contact with the latch valve spool 160 to the end of the latch valve body 150, An inlet port L1 through which the pressure fluid flows in the connection pipe E10 is formed as an inner space of the inner surface of the spout valve body 150 while a pressure fluid is supplied through the outlet connection pipe J10 to the tank 104 (Not shown) is formed on the inner surface of the latch valve body 150 as a recessed space. The latch valve body 150 is formed with a latch valve outlet port L4 connected to the pilot port 103 through the pilot port connection pipe K10 to apply pilot pressure to the first valve body 110. [ The latch valve outlet port L4 communicates with the spool latch port L3 that presses the latch valve spool 160 to maintain the switching position of the valve. The latch valve outlet port L4 and the spool latch port L3 may be connected to a pilot port formed in the second valve body 120. [ The inlet port L1 may be directly connected to the fluid source directly through the inlet connection pipe H10 without through the supply connection pipe E10.

The latch valve spool 160 operates in the latch valve body 150 and has a structure in which two land portions 161 and 162 are connected by one spool rod portion 163. The latch valve spool 160 moves to one side by the elastic force of the latch valve spring 106 and keeps the pilot pressure of the main valve 70 in the released state. The land portion 161 opens and closes the outflow port L2 and the land portion 162 opens and closes the inflow port L1. 4 is a neutral state in which the land portions 161 and 162 close the outlet port L2 and the inlet port L1.

The direction switching valve operation connecting rod 170 has one side fixedly connected to the land portion 162 of the latch valve spool 160 and the other side projecting into the first cylinder chamber 61a or the second cylinder chamber 61b And the latch valve spool 160 is moved left and right when the first piston 62 and the second piston 63 reach the end of the cylinder chamber. The direction switching valve operation connecting rod 170 may be replaced by a separate mechanical push rod or electromagnet.

The operation of the automatic reciprocating motion control mechanism for the double-acting type reciprocating pressure booster according to the first embodiment of the present invention will be described with reference to FIGS. 5A and 5B.

When the first spool 130 and the second spool 140 move to the right according to the restoring action of the operating spring 102 at the neutral position of FIG. 4, as shown in FIG. 5A, The connection port Xb communicates with the drive port C2 and the connection port Xb communicates with the drive port C2 while the connection port Xa communicates with the return port R1, (Hereinafter referred to as " A position ").

The fluid supplied from the fluid supply source (not shown) through the supply connection pipe E10 is connected to the supply port P and the connection port A and flows through the booster connection pipe D11 to the first input / (The left side space of the first piston) of the first cylinder chamber 61a through the first cylinder chamber 61a and the piston joints (the first piston and the second piston and the piston rod) 62 of the pressure booster 60, 63, 64) to the right. At the same time, the fluid in one side (right side) space of the second cylinder chamber 61b (the space on the right side of the second piston) flows out through the second input / output port 65b, passes through the booster connection pipe D12, And the drive port C2, and is supplied to the drive device (not shown) through the drive connection pipe F10.

On the other hand, the fluid in the other side (right side) space (the space on the right side of the first piston) of the first cylinder chamber 61a flows out through the first discharge back pressure port 66a and passes through the booster connection pipe D13, Xa and the return port R1 and is discharged to the tank 104 through the return connection pipe G10. Simultaneously, the fluid flowing out through the connection port B and the drive port C2 passes through the booster connection pipe D14 through the drive port C3 and the connection port Xb, and flows through the second discharge backpressure port 66b (The left space of the second piston) of the second cylinder chamber 61b to apply the back pressure to the second piston 63.

When the right side surface of the first piston 62 of the double-acting type reciprocating pressure booster 60 contacts the pressing pin portion 171 of the valve operation connecting rod 170, the latch valve spool 160 moves to the right, And the pressure fluid flowing into the latch valve body 150 through the inlet connection pipe H10 connected to the fluid source flows through the latch valve outlet port L4 and the pilot port connection pipe K10 to the first A pilot pressure is applied to the right side surface of the first spool 130 in the pilot port 103 of the valve body 110 to move the first spool 130 to the left. At this time, since the spool latch port L3 is connected to the latch valve outlet port L4, back pressure is applied to the left side surface of the latch valve spool 160, and the latch valve spool 160 is moved to the right The outlet port L2 is kept closed.

The supply port P is communicated with the connection port B and the connection port A is communicated with the connection port B as shown in Figure 5B when the second spool 140 integrally formed with the first spool 130 moves to the left, The connection port Xa communicates with the drive port C3 and the connection port Xb communicates with the return port R2 (hereinafter, referred to as a B position).

The fluid supplied from the fluid supply source (not shown) through the supply connection pipe E10 is connected to the supply port P and the connection port B and flows through the booster connection pipe D12 to the second input / (The right side space of the second piston) of the second cylinder chamber 61b through the first and second piston chambers 61a and 61b and the piston assemblies (the first piston and the second piston and the piston rod) 62 of the pressure booster 60, 63, 64) to the left. At the same time, the fluid in one side (left side) space (the left side space of the first piston) of the first cylinder chamber 61a flows out through the first input / output port 65a, passes through the booster connection pipe D11, And the driving port C1, and is supplied to the driving device (not shown) through the driving connection pipe F10.

On the other hand, the fluid in the other side (left side) space of the second cylinder chamber 61b (the left side space of the second piston) flows out through the second discharge back pressure port 66b, passes through the booster connection pipe D14, Xb and the return port R2, and is discharged to the tank 104 through the return connection pipe G10. At the same time, the fluid flowing out through the connection port A and the drive port C1 passes through the booster connection pipe D13 through the drive port C3 and the connection port Xa, and flows through the first discharge backpressure port 66a (The right side space of the first piston) of the first cylinder chamber 61a to apply the back pressure to the first piston 62a.

At this time, the left side surface of the second piston 63 of the double-acting type reciprocating pressure booster 60 is brought into contact with the pressing pin portion 171 of the valve operation connecting rod 170 so that the latch valve spool 160 is engaged with the latch valve spring 106, The inflow port L1 is closed and the outflow port L2 is opened so that the pilot pressure through the spool latch port L3 and the pilot port 103 is released, The first spool 130 moves to the right due to the elastic force of the spring 102. [

As described above, the piston assemblies (the first piston, the second piston, and the piston rod) of the pressure booster are supplied through the supply port P from the fluid supply source as the neutral position and the A position and the B position are repeated in the cylinder 61 The fluid is pressurized through a double-acting, reciprocable pressure booster (60) to continuously drive the drive through the drive ports (C1, C2).

6 is a configuration diagram showing an automatic reciprocating motion control mechanism for a double-acting type reciprocating pressure booster according to a second embodiment of the present invention. As shown in the drawings, the control mechanism 200 according to the second embodiment of the present invention includes a main valve 70 connected to the double-action type shuttable pressure booster 60 for opening and closing the input / output port and the exhaust backpressure port, And a latch valve 80 connected to the pressure booster 60 and the main control valve 70 for actuating the spool of the main control valve 70 in accordance with the position of the piston of the double acting type reciprocating pressure booster 60.

The main control valve 70 includes a first valve body 210 having two connection ports A and B to which the booster connection pipes D21 and D22 are respectively connected and a booster connection pipe D23 and D24, A second valve body 220 integrally formed with the first valve body 210 and having two connection ports Xa and Xb respectively connected to the first valve body 210 and the second valve body 210, And a second spool 240 that operates in the second valve body 220 and is formed integrally with the first spool 230.

The first valve body 210 is formed with a supply port (P port) P through which fluid is supplied from a fluid supply source (not shown) through a supply connection pipe E20, Two drive ports (C ports) C1 and C2 for supplying the fluid pressurized by the booster to the drive device are formed. One return port (R port) R for returning fluid to the tank 204 through the return connection pipe G20 is formed in the second valve body 220, (C ports) C3 and C4 connected to the driving force F20 to form a back pressure are formed.

The remaining configuration and operation of the second embodiment of the present invention are similar to those of the first embodiment (Figs. 4 to 5B), and therefore, a 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 in the form of two to six land portions. In the first and second embodiments of the present invention, the first spool has three land portions, and the second spool has two land portions.

In an embodiment of the invention, the spool of the latch valve may be configured in the form of two to three land portions. In the first and second embodiments of the present invention, the spool of the latch valve has two land portions.

In addition, the automatic reciprocating motion control mechanism of the present invention can be used as an automatic reciprocating motion control mechanism for FA since the double-acting type reciprocating pressure booster 60 acts as a flow amplifier (FA) when the inlet and outlet are switched and reversed.

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.

60: Double-acting reciprocating pressure booster
61: cylinder 61a: first cylinder chamber
61b: second cylinder chamber 62: first piston
63: second piston 64: piston rod
65a: first input / output port 65b: second input / output port
66a: first exhaust backpressure port 66b: second exhaust backpressure port
70: main valve 80: latch valve
102: Operation spring 103: Pilot port
104: tank 105: spool connecting rod section
106: latch valve spring 110: first valve body
120 second valve body 130: first spool
140: second spool 150: latch valve body
160: Latch valve spool 170: Direction switching valve operation connecting rod
171:
A, B, Xa, Xb: connection port C1, C2, C3, C4:
D11, D12, D13, D14: Booster connector
E10: Supply connector F10: Drive connector
G10: Return connector H10: Inlet connector
J10: Outlet connector K10: Pilot port connector
L1: incoming port L2: outgoing port
L3: Spool latch port L4: Latch valve outlet port
O: Orifice P: Supply port
R1, R2: return port

Claims (12)

A first input / output port formed on one side of the first cylinder chamber, a second input / output port formed on one side of the second cylinder chamber, a first exhaust backpressure port formed on the other side of the first cylinder chamber, A control mechanism for controlling a double-acting reciprocating pressure booster provided with a second discharge back pressure port formed therein,
A main control valve connected to the double-acting type pressure booster for opening and closing the two input / output ports and the two discharge back pressure ports, and a control valve connected to the main valve and the double- And a latch valve for actuating the spool of the main control valve in accordance with the piston position;
Wherein the main valve has a first valve body having two connection ports connected to the first input / output port and the second input / output port, and two connection portions connected to the first discharge back pressure port and the second discharge back pressure port, A second valve body having a port and integrally formed with the first valve body, a first spool operable in the first valve body, and a second valve body operative in the second valve body and formed integrally with the first spool A second spool;
A latch valve body having an inlet port connected to a fluid source and a latch valve outlet port connected to the first valve body or the second valve body for applying pilot pressure;
A latch valve spool operable within said latch valve body;
And a valve operation connecting rod connected to the latch valve spool. The automatic reciprocating motion control mechanism for a double-acting reciprocating pressure booster according to claim 1, delete The method according to claim 1,
Wherein the latch valve outlet port communicates with a spool latch port that presses the latch valve spool to maintain the valve switching position. The method according to claim 1,
Wherein the valve operation connecting rod has a push pin portion protruding into the first cylinder chamber or the second cylinder chamber. The method according to claim 1,
Wherein the latch valve spool moves to one side by an elastic force of the latch valve spring to maintain the pilot pressure of the main valve in the released state. The method according to claim 1,
Wherein the latch valve spool has two land portions connected by one spool rod portion. The method according to claim 1,
Wherein the first valve body is formed with a supply port for supplying fluid from a fluid supply source,
And a return port for returning fluid to the tank is formed in the second valve body. The method of claim 7,
Wherein the return port is formed by one or two return ports. The method according to claim 1,
Wherein the first valve body and the second valve body are provided with a driving port for supplying the fluid pressurized by the double-acting type reciprocating pressure booster to the driving device or forming a back pressure in the double-acting type reciprocating pressure booster Automatic reciprocating control mechanism for double - acting reciprocating pressure booster. The method of claim 9,
Wherein the drive port is formed by one or two drive ports. The method according to claim 1,
Wherein the first spool and the second spool include a land portion and a spool rod portion that connects the land portion and the land portion. The method according to claim 1,
Wherein the first spool is connected to the three land portions by two spool rod portions and the two land portions are connected by one spool rod portion. Motion control mechanism.

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