JP2563914Y2 - Multiple switching valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve for switching a flow direction of a fluid, and more particularly to a switching valve having a plurality of valve bodies.

[0002]

2. Description of the Related Art A fluid pressure device operated by a pressure fluid supplies a pressure fluid per unit time compared to other fluid pressure devices because the device itself is large-sized or driven at a high speed. In some cases, the amount must be increased, and in order to meet this demand, the size of the switching valve must be increased.
However, since the switching valve is usually installed continuously to the manifold base or a desired number of manifold blocks for centralized management and maintenance of the working environment, only one or several switching valves are provided. Is difficult to make large.

In order to solve this problem, it is conceivable to collect the pressure fluids output from a plurality of switching valves and supply the collected fluids to a desired hydraulic device. Since there is a variation in the supply amount, a difference occurs in the moving speed of the valve body of each switching valve, so that a satisfactory result cannot be obtained.

[0004]

A problem to be solved by the present invention is to provide a switching valve that drives a plurality of valve bodies in synchronization.

[0005]

In order to solve the above problems, a multiple switching valve according to the present invention comprises a main valve having a valve body for switching a flow direction of a fluid, and a valve provided in a pilot chamber of the main valve. In a switching valve including a pilot valve for supplying and discharging a pilot fluid for driving a body, the main valve is slidably inserted into a plurality of valve bodies and a pilot chamber to synchronously drive these valve bodies. It is characterized by having a common piston. Further, in order to solve the same problem, a plurality of pilot chambers respectively corresponding to the plurality of valve bodies, a plurality of pistons individually inserted in these pilot chambers, and a pilot fluid common to these pilot chambers And a pilot flow path for supplying the pressure.

[0006]

When a pilot fluid is supplied to and discharged from the pilot chamber of the main valve by the pilot valve, a plurality of valve elements provided in the main valve are driven, so that a large amount of pressure fluid can be output from one switching valve. it can. In this case, a plurality of valve elements are driven by one piston or a plurality of pistons on which a common pilot fluid acts, so that the respective valve elements are reliably driven synchronously.

[0007]

1 and 2 show a first embodiment of the present invention.
The multiple switching valve includes a main valve 1 and a pilot valve 2. The body 3 of the main valve 1 has a width corresponding to a plurality of manifold blocks 4 (two in the figure). It is installed over four and four. The body 3 includes two supply ports P, output ports A and B, and discharge ports EA, corresponding to each manifold block 4.
EB and two through holes 6, 6 opening these ports
The valve bodies 7, 7 slidably inserted into the through holes 6, 6, include a first switching position where the ports P and A and B and EB communicate with each other, and the ports P and B, and A and EA. Communicate with the second
Is configured to be switchable to the switching position.
Each manifold block 4 includes a supply flow path 8 and a discharge flow path 9a, 9b which are connected to each other through a continuous connection, and a plurality of output openings (not shown).
The discharge ports EA and EB communicate with the discharge passages 9a and 9b, and the output ports A and B communicate with the respective output openings. However, the main valve of the present invention is not limited to the five-port valve, but may be a four-port valve or a three-port valve. Cover 11 for closing both ends of body 3
a, 11b have pilot chambers 12a, 12b, and pistons 13 slidably inserted into these pilot chambers.
In a and 13b, branched ends abut against the valve bodies 7 and 7 in the through holes 6 and 6, respectively, and return springs 14 and 14 are contracted in the pilot chamber 12b. These pistons 13a and 13b have an elliptical shape in which the width direction is longer than the height direction in side view, and the pressure receiving area of the piston 13a is one.
3b is larger than the pressure receiving area. 1 in FIG.
Reference numeral 5 denotes a flow path for applying a fluid pressure between the pistons 13a and 13b and the body 3 and communicates with the supply port P.

The pilot valve 2 is attached to the cover 11a via an adapter 16, and the solenoid 2a
Is configured as a well-known three-port solenoid valve that switches the pilot output port a to a pilot supply port p and a pilot discharge port r to communicate with each other by excitation and release of the pilot output port a. 17a, 1
7b, the pilot supply port p and the pilot chamber 1
2b, and the pilot output port a communicates with the pilot chamber 12a through a pilot flow path 18.
However, the pilot valve of the present invention is not limited to the solenoid drive, and may be driven by fluid pressure or the like.

A manual operation button 20 is provided on the cover 11a. In the state shown in FIG. 2, the manual operation button 20 is
a and the pilot flow path 18 do not communicate with each other. When the operation of the pilot valve 2 becomes impossible due to an accident such as a power failure, when the manual operation button 20 is pressed against the urging force of the spring 21, the supply flow path 17 a and the pilot flow path 18 pass through the pilot valve 2. The fluid can be supplied to the pilot chamber 12a manually since the fluid is directly communicated without any fluid.

In the first embodiment, when the solenoid 2a of the pilot valve 2 is excited in the state shown in FIG. 2 in which the valve bodies 7, 7 are in the second switching position, the pilot supply port p and the pilot output port a communicate with each other. Pilot room 12a
Is supplied with the pilot fluid, so that the piston 13a,
13b and the valve bodies 7, 7 move rightward in the figure to
When the solenoid 2a is switched to the first switching position in which the pilot output port a communicates with the pilot discharge port r, the pilot output port a communicates with the pilot discharge port r.
The pilot air in the pilot chamber 12a is discharged, and the valve bodies 7, 7 are switched to the illustrated second switching position. in this case,
The valve bodies 7, 7 are moved by being pressed by one piston 13a, 13b on which a common pilot fluid acts, so that the driving speed does not deviate synchronously with certainty. Further, since the body 3 of the main valve 1 has twice the width of the manifold block 4, it has two valve bodies 7, 7 and is arranged neatly with other switching valves on the continuously connected manifold base. Can be installed.

3 to 5 show a second embodiment of the present invention, in which a pilot valve 25 has a pilot supply port p, pilot output ports a and b, and pilot discharge ports r1 and r2. It is configured as a double solenoid type 5-port solenoid valve (see FIG. 4), and the pilot output port b is
Communicates with the pilot chamber 12b. The cover 11a is provided with a manual operation button 27 having a configuration similar to that of the manual operation button 20 for directly connecting the supply flow path 17a and the pilot flow path 26 by pressing. And 27 are communicated by a channel 28 (see FIGS. 3 and 5). Since other configurations and operations of the second embodiment are the same as those of the first embodiment, the same reference numerals are given to the main parts of the drawing, and the detailed description is omitted.

FIG. 6 shows a third embodiment of the present invention. In the third embodiment, a main valve 30 has pilot chambers 31, 31 for each valve element 7, 7 and slides the pilot chambers individually. Pistons 32, 32 and a pilot flow path 33 for supplying a common pilot fluid to pilot chambers 31, 31
It has. Although not shown, the valve bodies 7, 7
The pilot chamber and the piston on the opposite side are similarly formed. In the third embodiment, the valve bodies 7, 7 are driven synchronously by a common pilot fluid. Since other configurations and operations of the third embodiment are the same as those of the first embodiment, the same portions in the drawings are denoted by the same reference numerals, and detailed description is omitted.

FIG. 7 shows a fourth embodiment of the present invention. In the fourth embodiment, a main valve 35 includes a pilot chamber 36 for each valve body 7, 7 and a piston, similarly to the third embodiment. 37,
The pilot chambers 36,... Communicate with the output port of the pilot valve by common pilot flow paths 38, 39. The other configuration of the fourth embodiment is the same as that of the second embodiment, and the operation is the same as that of the third embodiment.

[0014]

According to the multiple switching valve of the present invention, since a plurality of valve elements are driven by a common piston or a common pilot fluid, these valve elements are reliably driven in synchronization with each other. A large amount of pressure fluid can be output from one switching valve.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a main part of a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional plan view of a main part of the second embodiment.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a sectional view taken along the line CC of FIG. 3;

FIG. 6 is a cross-sectional plan view showing a main part of the third embodiment.

FIG. 7 is a cross-sectional plan view showing a main part of a fourth embodiment.

[Explanation of symbols]

 1, 30, 35 Main valve 2, 25 Pilot valve 7 Valve body 12a, 12b, 31, 36 Pilot chamber 13a, 13b, 32, 37 Piston 18, 26, 33, 38, 39 Pilot flow path

Claims (2)

(57) [Scope of request for utility model registration] 1. A switching valve comprising: a main valve having a valve body for switching a flow direction of a fluid; and a pilot valve for supplying and discharging a pilot fluid for driving the valve body to a pilot chamber of the main valve. The multiple switching valve, wherein the main valve includes a plurality of valve bodies and a common piston slidably inserted into the pilot chamber and synchronously driving these valve bodies. 2. A plurality of pilot chambers respectively corresponding to a plurality of valve bodies, a plurality of pistons individually inserted into the pilot chambers, and a pilot flow for supplying a common pilot fluid to the pilot chambers. The multiple switching valve according to claim 1, further comprising a passage.