JPH0557537U - Multiple switching valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a multiple switching valve in which a plurality of valve elements are synchronously driven. [Structure] The valve body 7, 7 for switching the flow direction of the fluid is inserted into the through holes 6, 6 provided in the body 3 of the main valve 1, and the cover 1
Piston 13 common to pilot chamber 12a provided in 1a
a is provided, the pilot fluid is supplied to and discharged from the pilot valve 2 to the pilot chamber 12a, and the valve elements 7, 7 are synchronously driven by the common piston. [Effect] A large amount of pressure fluid can be output from one switching valve.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a switching valve for switching the flow direction of fluid, and more particularly to a switching valve having a plurality of valve bodies.

[0002]

[Prior Art]

 A fluid pressure device that operates with pressure fluid requires a larger amount of pressure fluid supplied per unit time than other fluid pressure devices because of its large size and high-speed operation. There is something that must be done, and in order to meet this requirement, it is necessary to make the switching valve large. However, the switching valve is usually installed in series with the manifold base or a desired number of manifold blocks for centralized control and maintenance of the working environment, so one or several switching valves are installed. It is difficult to make only one large.

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

[0004]

[Problems to be solved by the device]

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

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the multiple switching valve of the present invention includes a main valve having a valve body for switching the flow direction of fluid, and a pilot fluid for driving the valve body in a pilot chamber of the main valve. In a switching valve having a pilot valve for supplying and discharging, the main valve includes a plurality of valve elements and a common piston slidably inserted in the pilot chamber for synchronously driving these valve elements. It is characterized by being. In order to solve the same problem, a plurality of pilot chambers respectively corresponding to a plurality of valve bodies, a plurality of pistons individually inserted into these pilot chambers, and a pilot common to these pilot chambers are also provided. It is characterized by having a pilot channel for supplying a fluid.

[0006]

[Action]

 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 bodies provided in the main valve are driven, so that a large amount of pressure fluid can be output from one switching valve. In this case, a plurality of valve bodies are driven by one piston or a plurality of pistons on which a common pilot fluid acts, so that the respective valve bodies are driven reliably in synchronization.

[0007]

【Example】

 1 and 2 show a first embodiment of the present invention. This multiple switching valve comprises a main valve 1 and a pilot valve 2, and a body 3 of the main valve 1 has a plurality of manifold blocks 4 ( It has a width of 2 pieces in the figure) and is installed so as to straddle the manifold blocks 4 and 4 that are connected in series. The body 3 has two supply ports P corresponding to each manifold block 4, output ports A and B, and discharge ports EA and EB, and two through holes 6 and 6 through which these ports open. The valve bodies 7, 7 slidably inserted into the through holes 6, 6 have a first switching position where ports P and A and B and EB communicate with each other, and a first switching position where ports P and B and A and EA communicate with each other. It is configured to be switchable to two switching positions. Each manifold block 4 is provided with a supply flow path 8 and a discharge flow path 9a, 9b that communicate with each other by a series of arrangements, and a plurality of output openings (not shown). The discharge ports EA and EB communicate with the discharge channels 9a and 9b, and the output ports A and B communicate with the output openings. However, the main valve of the present invention is not limited to the 5-port valve, and may be a 4-port valve or a 3-port valve. The covers 11a and 11b for closing both ends of the body 3 are provided with pilot chambers 12a and 12b, and the pistons 13a and 13b slidably inserted into these pilot chambers have their branched ends with through holes 6,6. The return springs 14 and 14 are contracted to the pilot chamber 12b by abutting against the valve bodies 7 and 7, respectively. These pistons 13a and 13b have an elliptical shape in which the width direction is longer than the height direction in a side view, and the pressure receiving area of the piston 13a is larger than the pressure receiving area of 13b. Reference numeral 15 in FIG. 1 is a flow path for creating a fluid pressure between the pistons 13a, 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 pilot output port a is switched between the pilot supply port p and the pilot discharge port r by exciting and releasing the solenoid 2a. The supply port P of the main valve 1 is connected to the pilot supply port p and the pilot chamber 12b by the supply flow passages 17a and 17b, and the pilot output port a is a pilot port. The flow path 18 communicates with the pilot chamber 12a. However, the pilot valve of the present invention is not limited to solenoid drive, and may be driven by fluid pressure or the like.

A manual operation button 20 is provided on the cover 11 a. In the state shown in FIG. 2, the manual operation button 20 does not connect the supply passage 17a and the pilot passage 18 due to the urging force of the spring 21. When the pilot valve 2 cannot be operated due to an accident such as a power failure, when the manual operation button 20 is pressed against the biasing force of the spring 21, the supply passage 17a and the pilot passage 18 are connected to each other by the pilot passage 2a. Since the fluid is directly communicated without passing through, the fluid can be manually supplied to the pilot chamber 12a.

In the first embodiment described above, when the solenoid 2a of the pilot valve 2 is excited in the state of FIG. 2 in which the valve elements 7, 7 are in the second switching position, the pilot supply port p and pilot output port a become Since the pilot fluid is supplied to the pilot chamber 12a in communication with each other, the pistons 13a, 13b and the valve bodies 7, 7 move to the right in the drawing to the first switching position where the ports P, A and B, EB communicate with each other. When the solenoid is switched off and the excitation of the solenoid 2a is released, the pilot output port a and the pilot discharge port r are communicated with each other, so that the pilot air in the pilot chamber 12a is discharged and the valve elements 7, 7 are moved to the second switching position shown in the figure. Switch. In this case, since the valve elements 7, 7 are pushed and moved by the single piston 13a, 13b on which the common pilot fluid acts, the drive speed does not shift in a reliable manner. Further, since the body 3 of the main valve 1 has a width twice that of the manifold block 4, the main valve 1 has two valve bodies 7 and 7 and is arranged neatly side by side with other switching valves on the manifold bases arranged in series. Can be installed.

3 to 5 show a second embodiment of the present invention, in which the 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 connected to the pilot chamber 12b by the pilot flow passage 26. Further, the cover 11a is provided with a manual operation button 27 having the same configuration as the above-mentioned manual operation button 20, which directly connects the supply flow path 17a and the pilot flow path 26 by pressing. The buttons 20 and 27 are communicated with each other by a flow path 28 (see FIGS. 3 and 5). Since the other structure and operation of the second embodiment are the same as those of the first embodiment, the same reference numerals are given to the main parts in the drawing, and the detailed description will be omitted.

FIG. 6 shows a third embodiment of the present invention. The main valve 30 in the third embodiment has pilot chambers 31, 31 for each valve element 7, 7 and slides these pilot chambers individually. Pistons 32, 32 and a pilot channel 33 for supplying a common pilot fluid to the pilot chambers 31, 31 are provided. Although not shown, the pilot chamber and the piston on the opposite side of the valve bodies 7 and 7 are also formed in the same manner. In the third embodiment, the valve elements 7, 7 are synchronously driven by the common pilot fluid. Since the other structure and operation of the third embodiment are the same as those of the first embodiment, the same reference numerals are given to the same portions in the drawings and detailed description thereof will be omitted.

FIG. 7 shows a fourth embodiment of the present invention. The main valve 35 in the fourth embodiment is similar to the third embodiment in that the pilot chambers 36, ... ., And the pilot chambers 36, ... Are connected to the output port of the pilot valve by common pilot channels 38, 39. The other structure 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]

[Effect of the device]

 In the multiple switching valve of the present invention, a plurality of valve bodies are driven by a common piston or a common pilot fluid so that these valve bodies are reliably driven in synchronization, so that one valve A large amount of pressure fluid can be output from the switching valve.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of essential parts 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 essential parts of a second embodiment.

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

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

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

FIG. 7 is a cross-sectional plan view showing the main parts of the 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)

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