JPH066859U - Double solenoid type switching valve and double pilot type solenoid valve using the same - Google Patents

Abstract

(57) [Summary] [Purpose] The double solenoid type solenoid valve is downsized, and this switching valve is used as a pilot valve for the double pilot solenoid valve to make the double pilot solenoid valve compact. [Composition] An input port P is provided in a common valve body 2 of a double solenoid type switching valve 1, and a valve chamber 6 is provided from both sides in the axial direction.
a and 6b, supply valve seats 7a and 7b are formed to face each other, and valve chambers 6a and 6b are opposed to the supply valve seats.
Partitioned with Retina 8a, 8b having 2a, 12b,
The valve portion is easily formed and the axial length is shortened. In addition, the switching valve 1 is used as a pilot valve, and the base 2
5. The double pilot type solenoid valve is made compact by installing the switching valve 1 on the one side in the axial direction of the main valve 20 installed above the switch valve 1 in the vertical direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double solenoid type switching valve having two solenoids, and a double pilot type solenoid valve using this switching valve as a pilot valve.

[0002]

[Prior art]

 A switching valve that opens and closes a valve seat by a solenoid is well known without particular exemplification, but if two switching valves are installed if necessary, there is a problem that the occupied space becomes large.

In order to solve this problem, it is conceivable to make the valve bodies of the two switching valves common, but it is expected that the space will be greatly reduced by simply making the valve bodies of the two switching valves common. It is not possible, and the valve part is troublesome to form.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide a small double solenoid solenoid type switching valve in which a valve portion can be easily formed, and a compact double pilot solenoid valve using it as a pilot valve.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the double solenoid type switching valve of the present invention is a switching valve in which two solenoids are individually driven by two solenoids, and the switching valve has a common input port. Of the valve body and the solenoids arranged on both sides in the axial direction thereof, and the valve body has a pair of valve chambers individually formed from both sides in the axial direction, and the valve chamber and the input port. A pair of supply valve seats, which are formed so as to face each other in the flow path to communicate with each other, a pair of retainers each having an exhaust valve seat facing each supply valve seat and mounted from both axial sides, and the valve described above. The valve body is provided with a pair of output ports communicating with the chamber and a pair of exhaust ports communicating with both sides of the retainer in the axial direction.Each valve chamber is provided with the valve element for opening and closing the supply valve seat and the exhaust valve seat. It has a feature. Further, in order to make the double pilot type solenoid valve compact, it is advisable to mount the switching valve as a pilot valve, with the axial direction being the vertical direction on one axial side of the main valve that switches the flow direction of the fluid.

[0006]

[Action and effect of the device]

 The double solenoid type switching valve is composed of a common valve body having a common input port and a pair of solenoids arranged on both sides in the axial direction. Therefore, when two switching valves are simply arranged side by side in the axial direction, In comparison, the overall length can be reduced by shortening the axial length.

In addition, since the supply valve seats that face each other and the valve chambers are formed from both sides in the axial direction of the common valve body, and the valve chambers are partitioned by the retainer having the discharge valve seat, Since the chamber and the supply valve seat can be formed from the mounting side of the solenoid in the valve body, these can be easily formed.

Further, since the switching valve is used as a pilot valve and is mounted on one side of the main valve in the axial direction with the axial direction being the vertical direction, the space on the side of the base can be effectively used, so that the double pilot type solenoid valve Can be small and have a small installation space.

[0009]

【Example】

 FIG. 1 shows a first embodiment of the present invention. This double solenoid type directional control valve 1 comprises a common valve body 2 and solenoids 3a and 3b mounted on both sides in the axial direction thereof. There is.

The valve body 2 has recesses 5a and 5b whose diameters are successively reduced from the mounting surfaces of the solenoids 3a and 3b toward the center, and the valve bodies 6a and 6b at the tips of the recesses 5a and 5b are opposed to each other. The supply valve seats 7a and 7b, which are formed in a rectangular shape, communicate with a common input port P by a passage.

The valve chambers 6a and 6b are partitioned by annular retainers 8a and 8b mounted in the recesses 5a and 5b, and the valve chambers 6a and 6b are formed on the output ports A1 and A2 and the plates behind the retainers 8a and 8b. The divided space communicates with the discharge ports R1 and R2, respectively, and these ports opened on the same surface as the input port P and the input port are the supply port 9 and the output port 10a, which are opened on the base 4. 10b and the discharge ports 11a and 11b, respectively. The retainers 8a, 8b have discharge valve seats 12a, 12b facing the supply valve seats 7a, 7b, and between the valve seats 7a and 12a and 7b and 12b, a double poppet type valve that opens and closes these valve seats. The bodies 13a and 13b are inserted.

In the solenoids 3a and 3b, when the exciting coils 15a and 15b are energized, the fixed iron cores 16a and 16b attract the movable iron cores 17a and 17b, and when the exciting coils 15a and 15b are de-energized, the movable iron cores 17a and 17b are deenergized. Is a well-known solenoid that is separated from the fixed iron core by the urging force of the return springs 18a and 18b. Thus, the valve bodies 13a, 13b are urged in the direction of closing the supply valve seats 7a, 7b.

In the first embodiment, in the illustrated state in which the valve bodies 13a and 13b close the supply valve seats 7a and 7b and open the discharge valve seats 12a and 12b, the exciting coils 15a and 15b are energized. Then, the valve bodies 13a and 13b open the supply valve seats 7a and 7b and close the discharge valve seats 12a and 12b, so that the fluid of the input port P flows out from the output ports A1 and A2, and the exciting coils 15a and 15b of the exciting coils 15a and 15b. When the energization is released, the state shown in the figure is restored and the fluid in the output ports A1 and A2 is discharged from the discharge ports R1 and R2.

The valve body 2 has concave portions 5a and 5b and valve chambers 6a and 6b formed from the mounting surfaces of the solenoids 3a and 3b on both sides toward the center, and the valve bodies 6a and 6b are arranged so as to face each other. By forming the supply valve seats 7a and 7b, it is possible to easily form them and easily form the common valve portion of the valve body 2. Further, by having the common input port P and opening and closing the valve seat by the double poppet type valve bodies 13a and 13b, the axial length of the switching valve 1 can be shortened and downsized. Furthermore, since each of the ports P, A1, A2, R1 and R2 is open on the same plane, it is easy to connect the flow path to these ports.

2 to 4 show a second embodiment of the present invention in which the double solenoid type switching valve 1 is used as a pilot valve of the main valve 20, and a body 21 of the main valve 20 installed on a base 25 is shown. Is equipped with a pressure fluid supply port 22, output ports 23A, 23B and discharge ports EA, EB, and through holes in the axial direction, and the supply port 22 and discharge ports EA, EB are based on a passage (not shown). The supply flow path 26 and the discharge flow paths 27a and 27b opened at 25 are individually communicated with each other. The spool 29, which slides in the sleeve mounted in the through hole, has ports 22 and 23A and 23B by pistons 31a and 31b pressed by pilot fluid pressure supplied to pilot chambers 30a and 30b on both sides in the axial direction. And EB are in communication with each other, and a second switching position is shown in which the ports 22 and 23B and 23A and EA are in communication with each other.

A manual operation portion 34 is attached to one side of the body 2 in the axial direction, and the switching valve 1 is attached to the other side of the manual operation portion 34 via a mounting plate 35 so that the axis line is in the vertical direction in the drawing. Is attached by an appropriate means. The input port P of the switching valve 1 communicates with the supply port 22 of the main valve 20 through the supply passage 36, the output port A1 communicates with the pilot chamber 30a through the output passage 37a (see FIG. 2), and the output port A 2 The output passage 37b communicates with the pilot chamber 30b (see FIG. 3), and the discharge ports R1 and R2 communicate with the discharge port EA of the main valve 20 through the common discharge passage 38 (see FIG. 4). A check valve 39 that allows only the flow from the ports R1 and R2 to the port EA is installed.

Push buttons 41a and 41b for manual operation are arranged in parallel in the width direction of the body 21 (direction orthogonal to the drawing) on the manual operation portion 34, and the push button 41a is supplied in the state shown in FIG. The passage 36 and the input port P and the output port A1 and the output passage 37a are connected to each other, and the supply passage 36 and the output passage 37a are connected to each other by pressing. The push button 41b has the output port A2 in the state shown in FIG. And the output passage 37b are communicated with each other, and the supply passage 36 and the output passage 37b are communicated with each other via the passage 42 between the push button 41a and the press button 41a. Therefore, when the solenoid valves 3a and 3b of the switching valve 1 are being commissioned before connection, when performing adjustment operation separately from electrical control, or when the switching valve 1 becomes inoperable due to an accident such as a power failure, these The spool 29 can be driven by the push buttons 41a and 41b. Reference numeral 44 in FIGS. 2 to 4 denotes a detent mechanism that holds the switching position of the spool 29.

The operation of the above-described second embodiment is the same as the well-known double pilot type solenoid valve which switches the spool by two pilot valves.

In the second embodiment described above, the switching valve 1 is installed as a pilot valve on one side of the body 21 of the main valve 20 installed on the base 25, and the axial direction of the switching valve 1 is set up and down. Since the directional length is short, the switching valve 1 can be installed by utilizing the space on one side of the base 25, so that the double pilot type solenoid valve can be made compact and the installation space is small.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment.

FIG. 2 is a vertical sectional view of a second embodiment.

FIG. 3 is a vertical sectional view of a different part of FIG.

FIG. 4 is a vertical sectional view of a further different part of FIG.

[Explanation of symbols]

 1 double solenoid type switching valve 2 valve body 3a, 3b solenoid 6a, 6b valve chamber 7a, 7b supply valve seat 8a, 8b retainer 12a, 12b discharge valve seat 13a, 13b valve body 20 main valve P, A1, A2, R1, R2 port

Claims (2)

[Scope of utility model registration request] 1. A switching valve in which two solenoids individually drive two valve bodies, wherein the switching valve has a common valve body having a common input port, and the switching valve is arranged on both sides in an axial direction thereof. A pair of valve chambers each having a solenoid, wherein the valve bodies are individually formed from both sides in the axial direction, and a pair of valve chambers formed so as to face each other in a flow path that connects these valve chambers and the input port. Supply valve seat of
A pair of retainers each having an exhaust valve seat facing each supply valve seat and mounted from both sides in the axial direction, a pair of output ports communicating with the valve chamber, and a pair of exhaust ports communicating with both axial sides of the retainer. And a valve body for opening and closing the supply valve seat and the discharge valve seat, respectively, provided in each valve chamber. 2. A double pilot type solenoid valve comprising a main valve for switching the flow direction of a fluid and a pilot valve for supplying a pilot fluid to the main valve, wherein the pilot valve has the configuration according to claim 1. Double pilot type solenoid valve characterized by being mounted on one side of the main valve with the axial direction being the vertical direction.