JP3141054B2 - Valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manifold having a plurality of mounting surfaces on which a plurality of pilot-operated switching valves are provided so as to be arranged in a stacked manner. It relates to the installed valve device.

[0002]

2. Description of the Related Art Japanese Patent Application No. 4-142196 filed by the present applicant is an example of this type of valve device. That is, as shown in FIG. 4, the pilot fluid flows through a supply flow path P connected to a pressure source, a low-pressure flow path R connected to a low-pressure side, and load flow paths A1 and B1 connectable to an actuator (not shown). A plurality of mounting surfaces 2A having two pilot flow paths 1A and 1B are formed and provided on one side surface of the manifold 3 (only one mounting surface 2A is shown in FIG. There is another mounting surface (not shown) in the perpendicular direction.)
On each mounting surface 2A, a pilot-operated switching valve 4 for switching control between the supply flow path P, the low-pressure flow path R, and the load flow paths A1 and B1 is provided in a stackable manner, and the mounting surface 2A of the manifold 3 is provided.
The first electromagnetic switching valve 5A at two positions is disposed on one side surface where the first electromagnetic switching valve 5A is not formed, and the second electromagnetic switching valve 5B at two positions is disposed on one side surface opposite to the one side surface on which the first electromagnetic switching valve 5A is disposed. The solenoid valve 5A, 5B is provided so that the switching valve 4 is pilot-operated by de-energization.

When the first electromagnetic switching valve 5A is energized from the state shown in FIG. 4, a part of the pressure fluid in the supply flow path P flows as pilot fluid from the pilot supply flow path 6A through the pilot flow path 1A and changes over to the switching valve. The pilot fluid in the second pilot chamber 7B flows through the pilot low pressure flow path 8B and the low pressure flow path R from the pilot flow path 1B and is discharged to the low pressure side.
Slides axially to the right in FIG. 4 to switch and connect the load channel B1 to the supply channel P and the load channel A1 to the low-pressure channel R. In this state, when the first electromagnetic switching valve 5A is de-energized,
The pilot fluid in the first pilot chamber 7A flows from the pilot flow path 1A through the pilot low pressure flow path 8A and the low pressure flow path R and is discharged to the low pressure side, and the spool 9 slides in the axial direction due to the spring force of the spring 10B. To the neutral position.

[0004] Further, from the state of FIG.
When B is energized, the pilot fluid flows from the pilot supply flow path 6B through the pilot flow path 1B and is supplied to the second pilot chamber 7B of the switching valve 4, and the switching valve 4 slides in the axial direction to the left in FIG. The load channel A1 is switched to the supply channel P, and the load channel B1 is switched to the low-pressure channel R.
In this state, when the second electromagnetic switching valve 5B is de-energized,
The pilot fluid in the pilot chamber 7B flows through the pilot low pressure flow path 8B and the low pressure flow path R from the pilot flow path 1B and is discharged to the low pressure side, and the spool 9 slides in the axial direction due to the spring force of the spring 10A to neutralize the neutral state in FIG. Return to position.

As described above, the switching valve 4 is pilot-operated by the first electromagnetic switching valve 5A and the second electromagnetic switching valve 5B, and the switching valve 4
To control the operation of the actuator with a large flow rate of fluid.

[0006]

However, in such a configuration, the first solenoid-operated directional control valve 5A,
Since the operation of the actuator is controlled by piloting the switching valve 4 with the second electromagnetic switching valve 5B, a small flow rate, for example, a fluid of 2 liters or less per minute, is supplied to each of the flow paths P, A1, B1,.
In the case of controlling the operation of the actuator by flowing through R, the ratio of fluid leakage between the switching valve 4 and each of the electromagnetic switching valves 5A and 5B with respect to a small flow rate of fluid for controlling the operation of the actuator becomes large, and the operation efficiency of the valve device is reduced. There has been a problem that it is significantly reduced. The present invention solves such a problem. When the operation of an actuator is controlled with a small flow rate of fluid, the actuator is directly operated and controlled by a first electromagnetic switching valve and a second electromagnetic switching valve disposed on a manifold. Accordingly, it is an object of the present invention to provide a valve device capable of reducing consumption of useless fluid due to fluid leakage and improving operation efficiency.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention provides a supply flow path connected to a pressure source, a low pressure flow path connected to a low pressure side, a load flow path connectable to an actuator, and two flow paths for pilot fluid. A plurality of mounting surfaces each having an open pilot channel are formed on one side surface of the manifold, and the supply channel, the low-pressure channel, and the load are provided on each mounting surface by supplying and discharging the pilot fluid flowing through each pilot channel. A pilot-operated switching valve for switching control between flow paths is provided in a stackable manner,
A two-position first electromagnetic switching valve for supplying a pilot fluid to one pilot flow path or discharging a pilot fluid in one pilot flow path to a low pressure side by energizing or de-energizing the switching valve so as to perform a pilot operation of the switching valve. A two-position second electromagnetic switch for supplying a pilot fluid to the other pilot flow path or discharging the pilot fluid in the other pilot flow path to the low-pressure side on one side where no mounting surface is formed, and on the other pilot flow path by energizing and de-energizing. The same number of valves as the number of mounting surfaces are provided on one side opposite to the side where the first solenoid-operated switching valve is provided, and a pilot-operated valve is provided on at least one mounting surface of the manifold. Without connecting the switching valves in a stacked manner, has a connection flow path for connecting each pilot flow path opened on this mounting surface to the actuator, and has a supply flow opened on the mounting surface. A low-pressure line and detachably attached to the plate member for closing the first electromagnetic switching valve of two-position and a second
Actuator operation control directly with electromagnetic switching valve 3
A position switching valve was configured.

[0008]

In the construction of the present invention, a pilot-operated switching valve is not stacked on at least one mounting surface of the manifold, and a plate member is removably mounted on this mounting surface. A first solenoid-operated switching valve and a second solenoid-operated switching valve, which are connected to the actuator, connect the supply passage and the low-pressure passage opened to the mounting surface, and connect the pilot passages opened to the mounting surface to the actuator. Both supply the pilot fluid to one of the pilot flow paths by energizing the first electromagnetic switching valve from the non-energized neutral position, and lower the pilot fluid in the other pilot flow path to the low pressure side by the non-energizing second electromagnetic switching valve. The pilot fluid is supplied to the other pilot flow path by discharging or the energization of the second electromagnetic switching valve, and the pilot fluid of one pilot flow path is supplied by the non-energized first electromagnetic switching valve. The fluid or discharged to the low pressure side, directly controls the operation of the actuator. For this reason, by using the pilot fluid flowing through each pilot flow path, the actuator can be directly operated and controlled by the first solenoid-operated switching valve and the second solenoid-operated switching valve disposed in the manifold, and wasteful operation caused by fluid leakage can be achieved. Fluid consumption can be reduced, and the operating efficiency of the valve device can be improved.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, the manifold 3, the first electromagnetic switching valve 5A, and the second electromagnetic switching valve 5B are the same as the conventional one shown in FIG. 4, and the manifold 3 is a pressure source P1.
And a low-pressure flow path R connected to the tank T as a low-pressure side penetrating the inside thereof in the longitudinal direction, and a pilot-operated switching valve is laminated on one side surface of the upper part thereof. , 2E are formed and provided, and each of the mounting surfaces 2A, 2B,..., 2E has a branch flow path of the supply flow path P and a low pressure flow path R. , And load flow paths A1, B1, A2,
B2,..., A5, B5, and 2 for circulating the pilot fluid
, 1 pilot channels 1A, 1B, 1C, 1D,.
I and 1J are provided with openings. The actuators are not connected to the load flow paths A1, B1,..., A5, B5 that can be connected to the actuators.

[0010] Attachment surfaces 2A, 2B,.
On one side where the first solenoid-operated switching valve 5A is disposed at two positions substantially orthogonal to the one side forming the 2E, the mounting surfaces 2A, 2B,. , 2E
, Five first solenoid-operated directional control valves 5A, 5C,
5E, 5G and 5I are disposed, and each of the first electromagnetic switching valves 5A,
, 5I are connected to one of the pilot flow paths 1A, 1
, 1I are connected to pilot supply flow paths 6A, 6C,..., 6I branch-connected to the supply flow path P, and are connected to one of the pilot flow paths 1A, 1C,. Are supplied as pilot fluids, and the pilot low-pressure channels 8A, 8 are connected to one of the pilot channels 1A, 1C,.
C,..., 8I in one pilot flow path 1
A, 1C,..., 1I are provided to discharge the pilot fluid to the tank T.

The first electromagnetic switching valve 5A of the manifold 3
.., The second solenoid-operated switching valve 5B is provided on one side where the second solenoid-operated switching valve 5B at two positions is arranged opposite to the one side face on which the 5I is arranged.
And five second solenoid-operated directional control valves 5 along the longitudinal direction thereof.
B, 5D, 5F, 5H, 5J are arranged, and each of the second solenoid-operated directional control valves 5B,.
B, 1D,..., 1J are connected to pilot supply flow paths 6B, 6D,
, 6J and the other pilot flow paths 1B, 1
, 1J, and the other pilot flow path 1B, 1D,... 1J is switched to the pilot low pressure flow paths 8B, 8D,. The pilot fluids 1B, 1D,..., 1J are provided to be discharged to the tank T.

Each of the first electromagnetic switching valves 5A,.
The solenoid-operated directional control valves 5B,..., 5J operate pilot-operated directional control valves when a pilot-operated directional control valve is disposed on each of the mounting surfaces 2A, 2B,. Each mounting surface 2A, 2B of the manifold 3,
.. Without a pilot-operated switching valve on 2E, instead of plate members 11A, 11B, 11
C, 11D, and 11E are provided by being detachably provided by four screw members 12, respectively, and each plate member 11A,
, 11E are two connection flow paths respectively connecting the two pilot flow paths 1A, 1B, ..., 1I, 1J opened to the mounting surfaces 2A, ..., 2E to the actuators 13A, 13B, ..., 13E. 14A, 14B, 14C, 14
D, 14E, 14F, 14G, 14H, 14I, 14J
, And a branch flow path of the supply flow path P, a branch flow path of the low-pressure flow path R, and load flow paths A1, B1,..., A4, B5 respectively opened to the mounting surfaces 2A, 2B,. Are closed. Then, the first electromagnetic switching valve 5A,.
5J and the second electromagnetic switching valves 5B,..., 5J constitute a three-position switching valve that directly controls the operation of the actuators 13A,. Reference numeral 15 denotes a terminal box disposed on the manifold 3, and each of the first electromagnetic switching valves 5A,.
It has a terminal block for electrically connecting the lead wires from the electromagnetic switching valves 5B,..., 5J to the electric wiring from the outside.

Next, the operation of the above configuration will be described. FIG.
, 13E, the first electromagnetic switching valves 5A,..., 5I and the second electromagnetic switching valves 5B,.
The solenoid operated directional control valves 5A,.
, 1I are energized to the pilot low-pressure channels 8A,..., 8I, and each of the second solenoid-operated directional control valves 5B,. , ..., 8J.

In the state shown in FIG. 2, when the second electromagnetic switching valve 5B is energized, the other pilot flow path 1B is switched to the pilot supply flow path 6B, and the pilot fluid flows from the pilot supply flow path 6B to the other pilot flow path. 1B, connection channel 1
4B, and is supplied to the actuator 13A.
A, the pilot low-pressure flow path 8A and the low-pressure flow path R flow from one pilot flow path 1A and are discharged to the tank T, and operate in the left direction in FIG. When the actuator 13A operates to the left end, the second electromagnetic switching valve 5B is de-energized and the actuator 13A is stopped.

When the first electromagnetic switching valve 5A is energized with the actuator 13A stopped at the left end, the one pilot flow path 1A is switched to the pilot supply flow path 6A, and the pilot fluid flows through the pilot supply flow path 6A. The other pilot flow path 1A and the connection flow path 14A are supplied to the actuator 13A through the connection path 14B. The actuator 13A supplies the pilot flow in the connection flow path 14B and the other pilot flow path 1B to the pilot low pressure flow path 8B and the low pressure flow path. R flows and is discharged to the tank T to operate in the right direction in FIG. When the actuator 13A operates to the right end shown in FIG. 2, the first electromagnetic switching valve 5A is de-energized and the actuator 13A is stopped.

When the other second electromagnetic switching valves 5D,..., 5J are energized from the state shown in FIG.
, 13E operate leftward in FIG. 2 and stop at the left end, while the other actuators 13B,..., 13E stop at the left end, and the other first electromagnetic switching valves 5C,. , 5
When I is energized, the other actuators 13B,.
E operates rightward in FIG. 2 and stops at the right end shown in FIG. The operation of the actuators 13A,..., 13E can be controlled singly or a plurality of actuators can be controlled simultaneously.

With this operation, the pilot-operated switching valves are not stacked on each of the mounting surfaces 2A,..., 2E of the manifold 3, and the plate members 11A,. 11E are detachably arranged, and each pilot flow path 1A, 1A opened to the mounting surface 2A,.
B,..., 1J and 1J are actuators 13A,.
E, and closes the branch flow path of the supply flow path P, the branch flow path of the low-pressure flow path R, and the load flow paths A1, B1,..., A5, B5 opened to the mounting surfaces 2A,. , 5I, two-position first electromagnetic switching valves 5A,.
, 5J are supplied with the pilot fluid to one of the pilot flow paths 1A,..., 1I by energizing the first electromagnetic switching valves 5A,. Non-energized second electromagnetic switching valve 5B,..., 5
1J, the pilot fluid in the other pilot flow path 1B,.
B,..., 5J, the other pilot flow path 1B,
, 1J, and the pilot fluid in one of the pilot flow paths 1A,..., 1I is discharged to the tank T by the first solenoid-operated switching valves 5A,. , 13E to directly control the operation of the pilot flow paths 1A, 1B,.
Using the pilot fluid flowing through 1I and 1J, the first electromagnetic switching valves 5A,... 5I and the second electromagnetic switching valves 5B,.
A,..., And 13E can be directly operated and controlled, and wasteful fluid consumption due to fluid leakage can be favorably reduced, and the operating efficiency of the valve device can be improved. Further, since the pilot operated switching valves are not stacked on each of the mounting surfaces 2A,..., 2E of the manifold 3, the number of valve points can be reduced by the number of the switching valves, and the overall configuration of the valve device is simplified. Can be achieved. Further, each mounting surface 2A... 2E of the manifold 3
The first solenoid-operated switching valves 5A,...
B,..., 5J in a case where a pilot-operated switching valve for pilot operation is arranged and the actuator is operated and controlled with a large flow rate of fluid, the manifold 3, the first solenoid-operated switching valves 5A,. , 5J can be used with the same configuration, and the compatibility can be improved satisfactorily.

FIG. 3 shows another embodiment of the present invention. The same parts as those in one embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described. Each mounting surface 2 of manifold 3
Each of the plate members 16A,... Disposed on the A,... With the screw member 12 so as to be detachable, has a connection flow path 17A, which connects one pilot flow path 1A to the load flow path A1, and the other pilot flow path 1B. Connecting channel 1 to the load channel B1
7B,.., And the branch flow path of the supply flow path P and the branch flow path of the low-pressure flow path R, which are open to each of the mounting surfaces 2A,. Then, the load flow paths A1, B1,.
Are connected to the actuators 18A,.

In operation, when the second electromagnetic switching valve 5B is energized, the pilot fluid flows from the pilot supply flow path 6B through the pilot flow path 1B, the connection flow path 17B, and the load flow path B1, and is supplied to the actuator 18A.
8A transfers the pilot fluid inside from the load flow path A1, the connection flow path 17A and the pilot low pressure flow path 8 through the pilot flow path 1A.
A, It flows and discharges through the low-pressure flow path R, and operates in the left direction of FIG. When the first electromagnetic switching valve 5A is energized, the pilot fluid flows from the pilot supply flow path 6A to the pilot flow path 1A.
A, flows through the connection flow path 17A and the load flow path A1 and is supplied to the actuator 18A. The actuator 18A transfers the internal pilot fluid from the load flow path B1, the connection flow path 17B and the pilot flow path 1B to the pilot low-pressure flow path 8B and the low-pressure flow path. It flows through the flow path R and is discharged to operate in the right direction in FIG. And
The same operation and effect as in the embodiment can be obtained.

In this embodiment, the plate members 11A,..., On all the mounting surfaces 2A,.
Although 11E and 16A are provided, it is a matter of course that a plate member may be provided on at least one mounting surface, and a pilot-operated switching valve may be provided on the remaining mounting surface in a stacked manner. is there.

[0021]

As described above, according to the present invention, the supply flow path connected to the pressure source, the low pressure flow path connected to the low pressure side, the load flow path connectable to the actuator, and the flow of the pilot fluid 2
A plurality of mounting surfaces, each having an open pilot channel, are formed and provided on one side of the manifold, and a supply channel and a low-pressure channel are provided on each mounting surface by supplying and discharging a pilot fluid flowing through each pilot channel. A pilot-operated switching valve for switching control between the pump flow path and the load flow path is provided in a stackable manner, and a pilot fluid is supplied to one pilot flow path or one pilot Or discharge the pilot fluid in the flow path to the low pressure side 2
Position the first solenoid-operated directional control valve on one side not forming the mounting surface of the manifold, supplying the pilot fluid to the other pilot flow path or discharging the pilot fluid in the other pilot flow path to the low pressure side by de-energization. The same number of mounting surfaces as the number of mounting surfaces is provided on one side opposite to the side on which the first electromagnetic switching valve is provided, and at least one of the manifolds is provided. On the mounting surface, without connecting and arranging a pilot-operated switching valve, without having a connection flow path connecting each pilot flow path opened on this mounting surface to the actuator, and a supply flow path opened on the mounting surface A plate member for closing the low-pressure flow path is detachably provided, and a three-position switching valve for directly controlling the operation of the actuator is constituted by the two-position first electromagnetic switching valve and the second electromagnetic switching valve. Because, it can be favorably reduced wasteful consumption of fluid resulting from fluid leakage can be improved operating efficiency of the valve device. In addition, since the pilot-operated switching valves are not stacked on the mounting surface of the manifold, the number of valve points can be reduced by the number of the switching valves, and the overall configuration of the valve device can be simplified. Furthermore, the manifold, the first solenoid-operated switching valve, and the second solenoid-operated switching valve have the same configuration when the pilot-operated switching valve is stacked on the mounting surface of the manifold and the actuator is operated and controlled with a large flow rate of fluid. It has an effect that it can be used and the compatibility can be improved satisfactorily.

[Brief description of the drawings]

1A and 1B show one embodiment of the present invention, wherein FIG. 1A is a plan view of a valve device, and FIG. 1B is a cross-sectional view taken along line AA of FIG.

FIG. 2 is a circuit diagram of one embodiment.

FIG. 3 shows another embodiment of the present invention, and is a longitudinal sectional view of a valve device partially in a circuit diagram.

FIG. 4 is a longitudinal sectional view of a valve device showing a conventional example.

[Explanation of symbols]

1A, 1B, 1C, 1D, 1I, 1J Pilot flow path 2A, 2B, 2E Mounting surface 3 Manifold 5A, 5C, 5E, 5G, 5I First electromagnetic switching valve 5B, 5D, 5F, 5H, 5J Second electromagnetic switching Valve 11A, 11B, 11C, 11D, 11E, 16A Plate member 13A, 13B, 13E, 18A Actuator P supply flow path R Low pressure flow path A1, B1, A2, B2, A5, B5 load flow path

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 27/00-27/12 F16K 31/06-31/11 F16K 31/36-31/42

Claims (1)

(57) [Claims] 1. A mounting surface having a supply flow path connected to a pressure source, a low pressure flow path connected to a low pressure side, a load flow path connectable to an actuator, and two pilot flow paths through which a pilot fluid flows is opened. A pilot-operated type in which a plurality is formed and provided on one side of the manifold, and on each mounting surface, switching between a supply flow path, a low-pressure flow path, and a load flow path is performed by supplying and discharging a pilot fluid flowing through each pilot flow path. The switching valve is provided in a stackable manner, and the pilot valve is supplied to one pilot flow path by energization and non-energization so as to operate the pilot valve, or the pilot fluid in one pilot flow path is discharged to the low pressure side. A two-position first solenoid-operated directional control valve is provided on one side of the manifold where no manifold mounting surface is formed. The same number of mounting surfaces as the number of mounting surfaces is provided on one side opposite to the side on which the first solenoid-operated switching valve is disposed, and the second solenoid-operated switching valve at two positions for discharging the pilot fluid to the low-pressure side of the pilot passage is provided. A connection flow path for connecting each pilot flow path opened in this mounting surface to the actuator without arranging a pilot-operated switching valve on at least one mounting surface of the manifold. And a plate member for closing the supply flow path and the low-pressure flow path opened in the mounting surface is detachably provided, and the actuator is directly operated by the first electromagnetic switching valve and the second electromagnetic switching valve at the two positions. A valve device comprising a three-position switching valve to be controlled.