JPH0438088Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a stacked pressure reducing valve used in a stacked liquid control device.

[Conventional technology]

Conventionally, this type of stacked pressure reducing valve
As shown in Japanese Patent No. 25054, a valve body slidably inserted into a fitting hole of a valve body is slid in the axial direction by the opposing action of the elastic force of an elastic member and the acting force due to the pressure of a pressurized liquid, A device is known in which the pressure liquid flowing through a liquid passage communicating with a fitting hole is controlled to be reduced to a set pressure by the elastic force of an elastic member.

[Problem that the invention attempts to solve]

However, such a laminated pressure reducing valve has a problem in that it is not possible to reduce the pressure of the pressurized liquid or prevent it from being controlled to reduce the pressure as necessary.

The present invention solves this problem by providing a laminated pressure reducing valve that allows easy control of reducing the pressure of a pressurized liquid or not controlling the pressure of the liquid.

[Means for solving problems]

The configuration of the present invention, which was made to solve such problems, includes a liquid passage through which pressure liquid flows, two liquid passages connected to the liquid actuator side,
It has a main body formed so that it can be laminated freely, with liquid passages connected to the low pressure side opened on both opposing sides and arranged through the main body, and a liquid passage through which pressurized liquid flows inside this main body and a liquid passage connected to the liquid actuator side. A fitting hole is provided that communicates with one of the two liquid passages to be connected, and a valve body that opens and closes the liquid passage that communicates with the fitting hole is slidably fitted in the fitting hole in the axial direction. The pressure liquid introduced into one end of the valve body acts in the direction of closing the liquid passage communicating with the fitting hole in the valve body, and the pressure liquid introduced into the other end of the valve body acts on the valve body. A working chamber is formed in the body that acts in the direction of opening a liquid passage communicating with the fitting hole, and a working chamber formed at the other end of the valve body is provided so that the pressure liquid is introduced through a restriction, and the valve body is connected to an elastic member. a sub-body that is biased in a direction to open a liquid passage communicating with the fitting hole by the elastic force of the main body, and is removably attached to one side of the main body that is substantially perpendicular to both sides where the plurality of liquid passages are opened; A communication passage is formed so that one end communicates with the working chamber at the end of the valve body into which the pressure liquid is introduced through the throttle, and the other end communicates with the liquid passage connected to the low pressure side of the main body. It consists of a solenoid valve that opens and closes a passage, and a pilot valve that sets the pressure in an action chamber at the end of the valve body into which pressure liquid is introduced through a throttle, which are arranged in series.

[Effect]

In the configuration of the present invention, when the communication passage of the sub-main body is opened by operating the solenoid valve, the pressure in the action chamber formed at the end of the valve body into which pressurized liquid is introduced via the throttle is set by the pilot valve, The pressure that causes the valve body to slide in the axial direction against the elastic force of the elastic member due to the pressure difference of the pressure liquid between the two end working chambers, and causes the liquid to flow through the liquid passage communicating with the fitting hole into which the valve body is fitted. The liquid is controlled to be reduced to the set pressure by the pilot valve.
Further, when the communication passage is closed by operating the solenoid valve, the pressure difference of the pressure liquid generated between the action chambers at both ends of the valve body is made zero, and the valve body is slid in the axial direction by the elastic force of the elastic member, thereby The liquid passage is opened to the maximum and the pressure liquid flowing through this liquid passage is not controlled to be depressurized. Therefore, a change operation such as reducing the pressure of the pressurized liquid or not controlling the pressure reduction can be performed by a simple operation of opening and closing the communication passage using the electromagnetic valve, and this changing operation can be performed extremely easily.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a valve body composed of a main body 2 and a sub-body 3. The main body 2 has a fitting hole 6 in which annular grooves 4 and 5 are spaced apart in the axial direction, and a liquid passage P1 that communicates with the annular groove 4 of the fitting hole 6 and introduces pressure liquid. On the side F1,
In addition, a liquid passage P2 communicating with the annular groove 5 and leading out the pressure liquid is provided with openings on the side face F1 and the side face F2 opposite to each other to form a liquid passage P through which the pressure liquid flows, and openings are provided on both sides F1 and F2. Two liquid passages A and B connecting to the liquid actuator side and two liquid passages R1 and R2 serving as a liquid passage R connecting to the low pressure side are disposed through and stacked freely. Reference numeral 7 denotes a valve body for opening and closing the liquid passage P, which is slidably inserted into the fitting hole 6 and is inserted into the annular groove 5.
This forms a constricted portion H, and the opening and closing of this constricted portion H corresponds to the opening and closing of the liquid passage P. 8 is valve body 7
A working chamber is formed at one end of the main body 2 from the passage 11.
It communicates with the liquid passage P2 via a switching member 12 attached to the side surface of the valve element 7, and is provided so that the pressure liquid introduced from the liquid passage P2 acts on the valve element 7 in the direction of closing the throttle part H. By changing the mounting direction of the switching member 12, a liquid passage communicating with the action chamber 8 can be freely selected to A or B. Reference numeral 9 denotes a working chamber formed at the other end of the valve body 7, which communicates with the working chamber 8 via a throttle 10 provided on the valve body 7, and is connected to the working chamber 8 through a throttle 10 provided in the valve body 7.
The pressure liquid introduced through the valve body 7 is provided so as to act on the valve body 7 in the direction of opening the throttle portion H. Reference numeral 13 denotes an elastic member which is housed in the action chamber 9 and is provided so that the valve body 7 is biased in the illustrated direction to open the throttle portion H by the elastic force of the attachment. The sub-body 3 has one side F3 that is substantially perpendicular to both sides F1, F2 of the main body 2 where the plurality of liquid passages P1, P2, A, B, R1, and R2 are opened.
It is removably attached to the inside, and there is a passage 14 from the action chamber 9 opened on one side F3.
A communication passage 16 is formed to communicate between the liquid passage R2 and the passage 15 from the low pressure side liquid passage R2. A pilot valve 17 is disposed in the communication passage 16 to set the pressure in the working chamber 9, and the poppet valve body 21 seated on the valve seat 20 and the poppet valve body 21 are inserted into the valve chamber 19 of the pilot valve body 18. Elastic member 2 biasing toward seat 20
2 is provided, and when the pressure liquid in the action chamber 9 is introduced into the valve seat passage 23 and the action force exceeds the elastic force of the elastic member 22, the poppet valve body 21 is disengaged from the valve seat 20 and the introduced pressure liquid is removed. is provided so as to escape from the valve chamber 19 to the liquid passage R2 on the lower pressure side. 24 is a screw member for adjusting the elastic force of the elastic member 22. Reference numeral 25 designates a solenoid valve disposed in the communication passage 16 in series with the pilot valve 17. A spool valve body 26 provided in the communication passage 16 on the upstream side of the pilot valve 17 is provided to freely open and close the communication passage 16. coil 2
The spool valve body 26 is actuated against the elastic force of the elastic member 29 by the suction force acting on the movable iron core 28 when energization is applied to the movable iron core 28 .

Next, the operation of this configuration will be explained.

FIG. 1 shows the electromagnetic valve 25 in a non-energized state, and the spool valve body 26 is urged toward the right end in the figure by the elastic force of the elastic member 29 to close the communication passage 16. The force urges it toward the left end in the figure, opening the aperture section H to its maximum extent. Now, the pressure liquid introduced into the liquid passage P1 is led out from the annular groove 4 through the constriction part H and the annular groove 5 to the liquid passage P2, and a part of it is transferred to the switching member 1 as a pilot liquid.
2. It is introduced into the working chamber 8 through the passage 11 and further into the working chamber 9 through the throttle 10. Communication path 1 is established by solenoid valve 25.
6 is closed, the valve body 7 has both end working chambers 8,
Since no pressure difference is caused by the pressure liquid between 9 and 9, the pressure liquid is held at the illustrated position, and the pressure liquid introduced into the liquid passage P1 is directly led out to the liquid passage P2. Next, when the electromagnetic valve 25 is energized and the spool valve body 26 is actuated to the left in the figure against the elastic force of the elastic member 29 to open the communication passage 16, the pressure liquid in the action chamber 9 flows into the pilot valve 17. It is introduced into the valve seat passage 23 and acts on the poppet valve body 21. The poppet valve body 21 separates from the valve seat 20 when the acting force of the opposing pressure liquid exceeds the elastic force of the elastic member 22, and the poppet valve body 21 releases the pressure liquid from the valve chamber 19 through the communication passage 16 and the passage 15 to the low pressure side. The pressure in the working chamber 9 decreases because the introduction of the pressure liquid is restricted by the throttle 10, and the valve body 7 is actuated by the acting force due to the pressure difference between the pressure liquid generated between the working chambers 8 and 9 at both ends. The elastic member 13 is slid against the elastic force of the elastic member 13 in the axial direction on the right side of the figure to narrow the opening of the constriction portion H, and the liquid passage P1 to P
2 to reduce the flow rate of the pressure liquid flowing to 2. Then, due to the pressure drop in the working chamber 9, the pilot valve 1
When the poppet valve body 21 of No. 7 is seated on the valve seat 20 by the elastic force of the elastic member 22, the pressure difference between the two end working chambers 8 and 9 decreases, and the elastic force of the elastic member 13 causes the valve body 7 to move toward the left axis in the figure. The pressure liquid in the liquid passage P2 is controlled to be reduced to the set pressure by the pilot valve 17. Furthermore, both end working chambers 8 of the valve body 7,
When the acting force due to the pressure difference between the pressure liquid and the pressure liquid generated between 9 and 9 greatly exceeds the elastic force of the elastic member 13, the valve body 7 is slid in the axial direction on the right side in the figure to close the throttle part H and release the pressure liquid to the liquid passage P2. stops flowing.

Further, when the electromagnetic valve 25 is de-energized, the spool valve body 26 is operated to return to the illustrated position by the elastic force of the elastic member 29, thereby closing the communication passage 16. Valve body 7
The pressure difference due to the pressure liquid between the two end working chambers 8 and 9 becomes zero, and the pressure liquid flowing into the liquid passage P2 is not controlled to be depressurized.

With this operation, the valve body 7 is slid in the axial direction by the acting force due to the pressure difference due to the pressure liquid between the both end action chambers 8 and 9 and the elastic force of the elastic member 13 by opening and closing the communication path 16 by the solenoid valve 25. and liquid passage P1
Since the pressure liquid flowing from P2 to P2 is changed to perform pressure reduction control or not to perform pressure reduction control, it is possible to extremely easily perform a change operation to perform pressure reduction control or not to perform pressure reduction control. In addition, since the valve body 1 is composed of the main body 2 and the sub-body 3, the sub-body 3 can be replaced as appropriate while the main body 2 remains disposed between the laminated valves. Other control functions can be obtained by replacing the valve 25 with a sub-main body having only the pilot valve 17. Furthermore, the solenoid valve 2 controls the opening and closing of the communication passage 16.
5, the change operation can be controlled remotely, and the pilot valve 17 and solenoid valve 25, which set the pressure in the action chamber 9 formed at the other end of the valve body 7, are connected to the sub-body 3. It is arranged in the passage 16 and the communication passage 1
Since the small flow rate of 6 is controlled, each valve is miniaturized and conveniently integrated into one place, and it is possible to obtain the same ease of handling as conventional valves.

Note that in one embodiment, the fitting hole 6 and the liquid passages P1 and P2 forming the liquid passage P are provided in communication with each other, but they may also be provided in communication with the liquid passage A or B connected to the liquid actuator side. In this case, the liquid passage A or B is divided by the fitting hole 6 like liquid passages P1 and P2, and the liquid passages P1 and
P2 is no longer divided by the fitting hole 6 like the liquid passage A or B. )Although the solenoid valve 25 is provided in the communication passage 16 on the upstream side of the pilot valve 17, it is of course possible to provide it in the communication passage 16 on the downstream side of the pilot valve 17.

[Effect of idea]

As described above, according to the present invention, the liquid passage through which the pressure liquid flows, the two liquid passages connected to the liquid actuator side, and the liquid passage connected to the low pressure side are opened on both opposing sides and are arranged through the passages. The main body has a main body that can be laminated freely, and a liquid passage through which pressurized liquid flows inside the main body, and a fitting that communicates with one of two liquid passages that connect to the liquid actuator side. A hole is provided, and a valve element that opens and closes a liquid passage communicating with the fitting hole is fitted into the fitting hole so as to be slidable in the axial direction, and the pressurized liquid introduced into one end of the valve element is fitted into the valve element. Forming an action chamber that acts in the direction of closing the liquid passage communicating with the hole,
A working chamber is formed in which the pressure liquid introduced into the other end of the valve body acts in the direction of opening a liquid passage communicating with the fitting hole in the valve body, and the pressure liquid restricts the working chamber formed at the other end of the valve body. The valve body is biased by the elastic force of the elastic member in the direction of opening the liquid passage communicating with the fitting hole, and the valve body is provided so as to be introduced through the main body through which the liquid passages are opened. The sub-body is removably attached to one side at a right angle, and one end communicates with the working chamber at the end of the valve body into which pressure liquid is introduced via a throttle, and the other end communicates with a liquid passageway that connects to the low-pressure side of the main body. A solenoid valve that opens and closes the communication path and a pilot valve that sets the pressure in the action chamber at the end of the valve body into which pressurized liquid is introduced through the throttle are arranged in series. As a result, it is possible to extremely easily perform a changing operation such that the pressure liquid is subjected to pressure reduction control or not to pressure reduction control.

Further, since the change operation is performed by opening and closing the communication passage using the electromagnetic valve, this change operation can be conveniently controlled remotely. Furthermore, the pilot valve and solenoid valve can be small enough to be placed in the communication passage of the sub-main body to control a small flow rate in the communication passage, and can be conveniently integrated into one place and have the same ease of handling as conventional valves. It has the effect of

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a stacked pressure reducing valve, and FIG. 2 is a cross-sectional view taken along the line -
FIG. 2... Main body, 3... Sub body, 6... Fitting hole,
7... Valve body, 8, 9... Action chamber, 10... Throttle,
16...Communication path, 17...Pilot valve, 25...
...Solenoid valve, P1, P2, A, B, R1, R2...
liquid passage.

Claims (1)

[Scope of utility model registration request] A liquid passage P through which pressure liquid flows, two liquid passages A and B connected to the liquid actuator side,
The main body 2 has a liquid passage R connected to a low pressure side and is opened on both side faces F1 and F2 facing each other, and is formed so as to be stackable. A fitting hole 6 communicating with one of the two liquid passages A and B connected to the passage P and the liquid actuator side is provided, and the liquid passage communicating with the fitting hole 6 is provided in the fitting hole 6. A valve body 7 that opens and closes is fitted and inserted so as to be slidable in the axial direction, and a pressure liquid introduced into one end of the valve body 7 is inserted into the fitting hole 6 of the valve body 7.
It forms an action chamber 8 that acts in the direction of closing the liquid passage communicating with the fitting hole 6 , and acts in the direction of opening the liquid passage communicating with the fitting hole 6 with the pressure liquid introduced into the other end of the valve body 7 . A working chamber 9 is formed, and a valve body 7
The pressure liquid squeezes the action chamber 9 formed at the other end 10
The valve body 7 is introduced through the elastic member 1.
Both side surfaces F of the main body 2 where the plurality of liquid passages P, A, B, and R are opened are biased in the direction of opening the liquid passage communicating with the fitting hole 6 by the elastic force of the main body 2.
1. One end communicates with the working chamber 9 at the end of the valve body 7 into which pressurized liquid is introduced via the throttle 10 to the sub-body 3 which is detachably attached to one side F3 substantially perpendicular to F2, and the other end communicates with the main body 2. A communication passage 16 is formed so as to communicate with the liquid passage R connected to the low pressure side of the communication passage 16, and a solenoid valve 25 for opening and closing the communication passage 16 is formed in the communication passage 16, and a valve body 7 into which pressurized liquid is introduced via the throttle 10. End working chamber 9
This stacked pressure reducing valve is constructed by arranging a pilot valve 17 in series to set the pressure.