JPH10103554A - Pilot solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pilot solenoid valve that can miniaturize a solenoid valve and improve responsiveness being provided with a DIN terminal. SOLUTION: A pilot solenoid valve 1 is provided with a pilot valve 5 electromagnetically driven so as to control pilot signal pressure, a main valve element 2 driven by the pilot signal pressure, and a feeder device for feeding electricity to a coil 4 of a solenoid of the pilot valve 5. This pilot solenoid valve 1 has a pilot valve casing 6 enclosing the pilot valve 5 and the feeder device inside and fitted to a main valve body 10 provided with the main valve element 2, and a terminal base assembly 80. The pilot valve 5 is installed in the pilot valve casing 6 in an orthogonal direction to the sliding direction of the main valve element 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pilot type solenoid valve, and more particularly to a pilot type solenoid valve to which a DIN terminal can be mounted.

[0002]

2. Description of the Related Art Conventionally, hydraulic equipment has been inexpensive,
It is used in various industries because it enables labor saving and automation. In addition, if air is used as a working fluid, it has recently been used in semiconductor production lines in order to keep the environment clean. Since the operation of the fluid pressure operated device is controlled by switching the flow path of the flow path switching valve, a pilot solenoid valve is mainly used as the flow path switching valve for more accurate control.

Further, a pilot base solenoid valve is often provided on a manifold base in which a passage serving as a pipe is formed inside and an output port for connecting a pipe to a number of fluid pressure operated devices is formed outside. It is mounted on a number of stations and used as a manifold. By using a manifold,
Centralized air supply and exhaust and reduced wiring have made it possible to greatly improve workability of piping and wiring, but on the other hand, because the location of the manifold is limited, the manifold, especially the pilot solenoid valve itself, has been miniaturized. Is required.

In order to supply external power to the solenoid of the pilot valve, a pilot-type solenoid valve is provided with:
A power supply terminal is provided. The power supply terminals include a connector terminal and a DIN terminal. At present, miniaturization of pilot valves is progressing, and correspondingly, small power supply terminals are mounted. However, at present, there is no DIN terminal that can correspond to the size of a small pilot valve as a product.

A conventional pilot-type solenoid valve having a DIN terminal is disclosed in Japanese Patent Application Laid-Open No. 8-4933, which will be described with reference to FIGS. FIG. 5 is an exploded perspective view of a power supply unit of a conventional pilot solenoid valve, and FIG. 6 is a sectional view of the pilot solenoid valve. As shown in FIG. 5, the pilot valve box 101
DIN terminals can be mounted using a terminal block 103 having the same width as the IN terminal box 102. That is, since the DIN terminal cannot be directly mounted on the miniaturized pilot valve, the DIN terminal can be mounted by being inserted into a case having a size in which the DIN terminal can be mounted. Further, since the pilot valve 105 and the power supply device 104 are hermetically sealed by the pilot valve box 101 and the terminal block 103, the pilot valve 105 and the power supply device 104 are excellent in dustproofness and dripproofness.

As shown in FIG. 6, the pilot type solenoid valve has a main valve body 110 and valve assemblies 111a and 111a.
b, and a well-known 5-port solenoid valve constituted by a pilot valve 105. In the main valve body 110, the supply port P, the exhaust ports RA, RB, and the output ports A, B of the working fluid, and these ports are opened, and the main valve body 1 is opened.
There is formed a valve hole into which 12 can fit and slide. A valve assembly 111a, 1 having piston chambers 113a, 113b to which the pilot fluid is supplied to the main valve body 110.
11b is attached. Further, the valve assembly 111a
, A pilot valve 105 is assembled.

The pilot solenoid valve 100 operates as follows. In the state shown in FIG. 6, when the coil 114 is energized, the pilot air supply port PA and the pilot output port CYL communicate with each other and the pilot fluid is supplied to the first piston chamber 113a, so that the main valve body 112 moves to the right. , Air supply port P, output port A, and output port B
And the exhaust port RB communicate with each other. When the energization of the coil 114 is released, the pilot output port CYL and the pilot exhaust port PR communicate with each other, the pilot fluid in the first piston chamber 113a is discharged to the outside, and the second piston chamber 11
By the pilot fluid acting on 3b, the main valve body 112 moves to the left, and the air supply port P communicates with the output port B, and the output port A communicates with the exhaust port RA. Channel switching is performed as described above.

[0008]

However, the pilot type solenoid valve described in Japanese Patent Application Laid-Open No. 8-4933 has the following problems. That is, since the pilot valve is arranged in the same direction as the sliding direction of the main valve body,
The overall length of the solenoid valve is longer. Therefore, there is a problem that the solenoid valve is increased in size, contrary to the demand for downsizing the solenoid valve.
Further, the flow path distance from the pilot valve to the piston chamber for supplying the pilot fluid becomes longer. Therefore, the pressure loss of the pilot fluid increases, and there is a problem that the response of the flow path switching by the operation of the main valve body is adversely affected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a pilot type solenoid valve having a DIN terminal and capable of reducing the size and improving the response of the solenoid valve. And

[0010]

According to the first aspect of the present invention, there is provided an electromagnetically driven pilot valve for controlling a pilot signal pressure, and a main valve driven by the pilot signal pressure. In a pilot type solenoid valve including a body and a power supply device for supplying power to a solenoid of the pilot valve, the pilot valve and the power supply device are housed inside, and attached to a main valve main body including the main valve body. A pilot valve box and a terminal block assembly, and the pilot valve is installed in the pilot valve box in a direction orthogonal to a sliding direction of the main valve element.

According to a second aspect of the present invention, in order to solve the above problem, in the pilot type solenoid valve according to the first aspect, the pilot valve box has a device for manually driving the main valve body. It is characterized by the following.

According to a third aspect of the present invention, in order to solve the above problems, in the pilot type solenoid valve according to the first or second aspect, the pilot valve box and the terminal block assembly are formed by an electromagnetic wave shielding member. It is characterized by having.

[0013] According to the pilot type solenoid valve having the above configuration, the pilot valve and the power supply device are hermetically sealed by assembling the pilot valve box and the terminal block.
The durability of the pilot valve is improved. Furthermore, by installing the pilot valve in the pilot valve box in a direction perpendicular to the direction in which the main valve slides, the overall length of the solenoid valve can be reduced, and the solenoid valve can be downsized. . In particular, the effect is great in a double solenoid type in which pilot valves are arranged on both sides of the main valve body.

Further, since the manual shaft is provided in the pilot valve box, a complete dust-proof and drip-proof structure is provided, and the flow path distance from the pilot valve to the piston chamber for supplying pilot signal pressure is minimized. The responsiveness of switching the flow path in the main valve body is improved.

Also, the pilot valve box and terminal block assembly are
Since the electromagnetic wave shielding member is provided, the electromagnetic wave generated from the coil of the pilot valve is not leaked to the outside, so that malfunction of the control device of the manifold can be prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a manifold according to the present invention will be described in detail with reference to the drawings, taking concrete embodiments. FIG. 1 is a sectional view of a pilot solenoid valve according to an embodiment of the present invention. The pilot-type solenoid valve 1 is a double solenoid type solenoid valve having a pilot valve 5 on both sides of a main valve body 10 having a main valve body 2 for switching a flow path. In the main valve body 10, the supply port P, the exhaust ports RA, RB, and the output ports A, B of the working fluid, and these ports are opened.
A valve hole is formed in which the can be fitted and slid. And
On both sides thereof, valve assemblies 11a and 11b having piston chambers 13a and 13b to which a pilot signal fluid is supplied are attached. Each piston chamber 13a, 13b is in contact with the main valve body 2 and a piston 3 which slides with a pilot fluid.
a and 3b are provided.

The pilot valve 5 includes a solenoid coil 4
Is configured as a well-known three-port solenoid valve that connects the pilot output port CYL provided in the valve block 7 to the pilot air supply port PA or the pilot exhaust port PR by energizing and releasing the valve. The pilot valve 5 is mounted in the pilot valve case 6 with mounting screws in a direction orthogonal to the sliding direction of the main valve body 2. Therefore, the connection surface of the pilot valve box 6 with the valve assembly 11a must have a predetermined thickness L in order to cut a female screw for the mounting screw.

Therefore, the pilot valve box 6 of the present embodiment is
As shown in FIG. 2B, a manual shaft 20 is provided in a portion having a predetermined thickness L. Therefore, unlike a conventional pilot-type solenoid valve, since there is no manual shaft in the valve assembly,
The pilot flow path in the valve assembly can be shortened. That is, in the present embodiment, the pilot valve 5 and the piston chamber 13a communicate with each other at the shortest distance.

The following description is based on the second piston chamber 13b.
Since the side has the same structure, only the first piston chamber 13a side will be described. Since the manual shaft 20 is normally urged upward by a spring 21, the pilot air supply passage 14 in the main valve body 10 communicates with the air supply port PA of the pilot valve 5, and the manual shaft 20 is pressed. Thereby, the pilot air supply passage 14 is configured to directly communicate with the piston chamber 13a without passing through the pilot valve 5. Also,
As shown in FIG. 2 (a), a female screw 22 for mounting the pilot valve 5 and a pilot air supply port PA provided on the valve block 7 of the pilot valve 5 are provided on the surface on which the pilot valve 5 is mounted. Pilot air supply port 23, pilot exhaust port hole 2 communicating with pilot exhaust port PR and pilot output port CYL, respectively.
5, and a pilot output hole 24 are formed. Further, FIG. 2 (c)
As shown in the figure, a pilot supply groove 26, a pilot exhaust groove 27, and a pilot output groove 28, which communicate with the pilot supply passage 14, the pilot exhaust passage 15, and the piston chamber 13a, respectively, are formed.

Valve assembly 11 attached to main valve body 10
FIG. 3A shows a pilot supply flow path 1 as shown in FIG.
4a, a pilot exhaust channel 15a, a pilot output channel 40, and a piston chamber 13a communicating with the pilot output channel 40 are formed. As shown in FIG. 3A, the connection surface with the pilot valve box 6 is located at a position communicating with the pilot air supply groove 26, the pilot exhaust port groove 27, and the pilot output groove 28 of the pilot valve box 6. The pilot air supply passage 14a, the pilot exhaust passage 15a, and the pilot output passage 40 are each open. Further, the connection surface with the main valve body 10 has a structure shown in FIG.
As shown in (c), a pilot supply flow path 14a, a pilot exhaust flow path 15a, and a pilot exhaust flow path 41 are provided at positions communicating with the pilot supply flow path 14, the pilot exhaust flow path 15, and the pilot exhaust port PR, respectively. It is open.

The above-described pilot valve box 6 and valve assembly 11a
Each of the pilot grooves is provided with a seal gasket so that the pilot fluid does not leak from the connection surface of each component.

As shown in FIG. 4, a power supply device for supplying power to the coil 4 of the pilot valve 5 includes two types of electric boards 5.
0, 60 and a holder 51 for holding the same. The holder 51 is a plate-like member having substantially the same shape as the coil mold surface, is made of a non-conductive material (for example, industrial plastic), and is integrally formed with connector terminals 52, 52. Further, connection holes 54, 54 for mounting the socket pins 53, 53 and mounting holes 55 for mounting to the pilot valve 5 are formed. Further, a wiring circuit is printed on each of the electrical boards.

The above-mentioned components are assembled as follows to constitute a power supply device. First, the connection hole 5 of the holder 51
The socket pins 53, 53 are press-fitted into the 4, 4 and assembled. At this time, the socket pins 53 are assembled so that the head of the socket pins 53 projects from the holder 51. Next, the electrical board 50 is passed through the connection holes 56, 56 for the connector terminals 52, 52, and the connection holes 57, 57 for the socket pins 53, 53, and is mounted on the holder 51. Solder the part and fix it. And the integrated holder 51
And the electrical board 50 with respect to the pilot valve 5 with the holder 5
Attachment is made by fitting socket pins 53, 53 to the coil terminals 61, 61 while fixing the mounting holes 55 and the mounting screws 58.

On the other hand, the socket pins 63, 63 are also press-fitted into the connection holes 62, 62 of the electrical board 60 and assembled. Also,
DIN is applied to the connection terminals 64, 64 provided on the electrical board 60.
The terminals 70 for terminal connection are mounted by soldering.
Then, socket pins 63,
63 is fitted. Thus, the electrical board 60, the electrical board 5
0 and the holder 51 are integrated, and the coil terminals 61, 6
1 and the DIN terminal connection terminals 70, 70 are electrically connected. Next, the DIN terminal connection terminals 70, 70 are inserted into the terminal insertion holes 81, 81 of the terminal block assembly 80, and the terminal block assembly 80 is mounted to the pilot valve box 6 with mounting screws 82.
Further, since the terminal block assembly 80 is formed so as to hold the electrical board 60, the terminal block assembly 80 and the pilot valve box 6 are firmly and securely held by joining. Then, the terminal cover 84 incorporating the DIN terminal box mounting female screw 83 is attached to the terminal block assembly 80 by welding.
Finally, as shown in FIG. 1, the DIN terminal box 85 is attached.

Since the power supply device having the above-described structure is hermetically sealed by the pilot valve box 6 and the terminal block assembly 80, the power supply device is extremely excellent in dustproof and drip-proof properties. Therefore, the electrical component board 5
It is possible to prevent electrical troubles such as disconnection and short circuit in the wiring circuit on 0, 60. In addition, since the components of the power supply device are connected using the socket pins 53 and 63, the power supply device can be detached for each electrical component board portion, so that maintenance is excellent. For example, it is easy to change from a DIN terminal to a connector. Alternatively, when the pilot valve fails, only the pilot valve needs to be replaced, and the power supply device can be used as it is. Furthermore, since the pilot valve box and the terminal block assembly have the electromagnetic wave shielding member, the electromagnetic wave generated from the coil of the pilot valve is not leaked to the outside, so that malfunction of the control device of the manifold can be prevented.

Here, the flow of the pilot fluid in the pilot solenoid valve 1 will be described with reference to FIG.
Here, it is assumed that the manual shaft 20 is not pressed. The pilot fluid supplied from the outside to the pilot supply passage 14 of the main valve body 10 is supplied from the pilot supply passage 14a of the valve assembly 11a to the supply port PA of the pilot valve 5.
Supplied to Then, when the coil 4 of the solenoid is energized, the pilot supply port PA of the pilot valve 5 and the pilot output port CYL communicate with each other, and the piston chamber 13
a is supplied with a pilot fluid. When the power to the coil 4 is released, the pilot output port C of the pilot valve 5 is released.
YL communicates with the pilot exhaust port PR, and the pilot fluid in the piston chamber 13a is discharged to the outside from the pilot exhaust port R through the pilot exhaust passage 41 of the valve assembly 11a.

The switching of the flow path in the main valve body 10 is as follows.
This is performed by operating the first pilot valve or the second pilot valve. Here, in FIG. 1, the pilot valve located on the left side of the main valve body 10 is referred to as a first pilot valve, and the pilot valve located on the right side is referred to as a second pilot valve. When the first pilot valve is operated, the pilot fluid is supplied to the first piston chamber 13a.
Moves to the right, and the air supply port P communicates with the output port A, and the output port B communicates with the exhaust port RB. When the second pilot valve is operated, the pilot fluid is supplied to the second piston chamber 13b, so that the main valve body 2 moves to the left, and the air supply port P and the output port B, and the output port A and the exhaust port. RA communicates.

[0028]

According to the pilot type solenoid valve of the present invention,
A pilot-type solenoid valve comprising: an electromagnetically driven pilot valve for controlling a pilot signal pressure; a main valve element driven by the pilot signal pressure; and a power supply device for supplying power to a solenoid of the pilot valve. The valve and the power supply device are housed therein, and the pilot valve box and the terminal block assembly are attached to the main valve body including the main valve body. Since the power supply device and the power supply device are sealed, the dustproof and drip-proof properties are excellent, and the durability of the pilot valve is improved. Furthermore, by installing the pilot valve in the pilot valve box in a direction perpendicular to the direction in which the main valve slides, the overall length of the solenoid valve can be reduced, and the solenoid valve can be downsized. .

Further, since the manual shaft is provided in the pilot valve box, a complete dust-proof / drip-proof structure is provided, and the flow path distance from the pilot valve to the piston chamber for supplying pilot signal pressure is minimized. The responsiveness of switching the flow path in the main valve body is improved.

The pilot valve box and the terminal block assembly are
Since the electromagnetic wave shielding member is provided, the electromagnetic wave generated from the coil of the pilot valve is not leaked to the outside, so that malfunction of the control device of the manifold can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a pilot solenoid valve according to an embodiment of the present invention.

FIGS. 2A and 2B are views showing a pilot valve box, wherein FIG. 2A is a view as seen from a terminal block assembly side, FIG. 2B is a sectional view, and FIG. 2C is a view as seen from a valve assembly side.

3A and 3B are views showing a valve assembly, in which FIG. 3A is a view as viewed from a pilot valve box side, FIG. 3B is a sectional view, and FIG. 3C is a view as viewed from a main valve body side.

FIG. 4 is an exploded perspective view of the power supply device.

FIG. 5 is an exploded perspective view of a conventional power supply device.

FIG. 6 is a sectional view of a conventional pilot type solenoid valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pilot type solenoid valve 2 Main valve body 3a, 3b Piston 4 Coil 5 Pilot valve 6 Pilot valve box 10 Main valve body 11a, 11b Valve assembly 13a, 13b Piston chamber 20 Manual shaft 50, 60 Electrical board 80 Terminal block assembly 85 DIN Terminal box

Claims (3)

[Claims] An electromagnetically driven pilot valve for controlling a pilot signal pressure, a main valve element driven by the pilot signal pressure, and a power supply device for supplying power to a solenoid of the pilot valve. In the valve, the pilot valve and the power supply device are housed therein, and the pilot valve box and the terminal block assembly attached to the main valve body including the main valve body, and the pilot valve box has A pilot solenoid valve, wherein a pilot valve is installed in a direction orthogonal to a direction in which the main valve element slides. 2. The pilot solenoid valve according to claim 1, wherein the pilot valve box has a device for manually driving the main valve body. 3. The pilot-type solenoid valve according to claim 1, wherein the pilot valve box and the terminal block assembly have an electromagnetic wave shielding member.