JPH0726809Y2 - Double pilot type solenoid valve with manual operation - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double pilot type solenoid valve having two manual operation parts.

[0002]

2. Description of the Related Art As shown in FIG. 6, a pilot solenoid valve 2a for supplying and discharging pilot fluid to and from a pilot chamber of the main valve 1 on both axial sides of the main valve 1 installed on a base 4.
And 2b are installed, and these pilot solenoid valves 2a, 2b are installed.
In addition, double pilot type solenoid valves provided with manual operating parts 3a and 3b, respectively, are already known.

However, the above-mentioned known double-pilot type solenoid valve has a problem that the operability is poor because the manual operation parts 3a and 3b must be operated at separate positions on both axial sides of the main valve 1. .

In order to solve this problem, it is conceivable to provide a manual operation unit between the main solenoid valve and the pilot solenoid valve separately from the pilot solenoid valve. It is necessary to provide a supply passage for supplying the pressure fluid of the valve to the pilot solenoid valve and a pilot passage for supplying the pilot fluid output from the pilot solenoid valve to the pilot chamber of the main valve. If it is provided between the pilot solenoid valves, there is a new problem that the structure of these passages becomes complicated and the adapter plate becomes large.

[0005]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a double pilot type solenoid valve in which the operability of a manual operation part is good and which can be miniaturized.

[0006]

In order to solve the above problems, the present invention provides a main valve and two pilot solenoid valves for supplying and discharging pilot fluid to and from the pilot chambers on both axial sides of the main valve. In a double pilot type solenoid valve having two manual operation parts for supplying a pressure fluid to the pilot chamber, the pilot solenoid valve is attached to an adapter plate arranged on one axial side of the main valve, The above-mentioned adapter plate is characterized in that two manual operating portions that can be operated from above the adapter plate are arranged side by side in a direction orthogonal to the axial direction of the main valve.

[0007]

[Operation] Each manual operation is performed during a trial run before the electrical connection to the solenoid of the pilot solenoid valve, when performing the adjustment operation separately from the electrical control, and when the pilot solenoid valve becomes inoperable due to an accident such as a power failure. Since the pressure fluid can be supplied to the corresponding pilot chamber by the operation portion, the main valve can be driven.

The above-mentioned manual operation portion is provided on the adapter plate on one side in the axial direction of the main valve all together, and can be operated from above, so that the operation is easy.

Further, since the two manual operating portions are arranged side by side in the direction orthogonal to the axial direction of the main valve, it is easy to form each passage for communicating the main valve and the pilot valve through the adapter plate. The whole can be miniaturized.

[0010]

1 to 4 show a first embodiment of the present invention. This double pilot type solenoid valve 11 includes a main valve 12,
Adapter plate 1 mounted on one side of the main valve 12 in the axial direction
3, the pilot solenoid valves 14a and 14b provided on one side of the adapter plate 13, and the manual operation portions 15a and 15b provided on the adapter plate 13, and the main valve 12 is installed on the base 16.

The valve body 18 of the main valve 12 has a pressure fluid supply port P, output ports A and B, and discharge ports EA and E.
B and an axial through hole, the supply port P and the discharge ports EA and EB are provided in the supply passage 19 and the discharge passages 20a and 20b of the base 16, and the output ports A and B are provided in the base 1.
The spool 21 is axially slidably inserted into the sleeve fitted in the through hole, which communicates with the output ports (not shown) of FIG.

Pilot chambers 22a, 2 at both ends of the through hole
Pistons 23a and 23b are slidably inserted in 2b, and spool 21 is set in ports P, A and B by pilot fluid pressure acting on pilot chambers 22a and 22b.
And EB communicate with each other, and a second switching position shown in the drawings in which ports P and B and A and EA communicate with each other.

The pilot type solenoid valves 14a and 14b have a valve body 26 common to the solenoids 25a and 25b,
An input port p and an output port A common to the valve body 26
1, A2 and discharge ports R1, R2 are opened in the same direction, respectively, and the input port p and the output ports A1, A2
Supply valve seats 27a and 27b are formed in a flow path that communicates with each other, and discharge valve seats 28a and 28b are formed in a flow path that communicates the output ports A1 and A2 and discharge ports R1 and R2, respectively. 29a and 29b are provided with supply valve seats 27a and 27 by exciting the solenoids 25a and 25b.
b is opened to close the discharge valve seats 28a and 28b, and the return springs 30a and 28b are released by deenergizing the solenoids 25a and 25b.
The supply valve seats 27a and 27b are closed and the discharge valve seats 28a and 28b are opened by returning by the biasing force of 30b.

The adapter plate 13 has a vertical hole 32 whose upper side is open on a surface orthogonal to the axial direction of the main valve 12.
a and 32b are opened substantially in parallel (see also FIG. 4), the hole 32
A supply passage 33a on the main valve side and a supply passage 33b on the pilot solenoid valve side, which communicate the supply port P of the main valve and the input port p of the pilot solenoid valve, are opened at substantially the same vertical position of a, and the pilot chamber is opened. 22a and pilot solenoid valve 14a
Main valve side pilot passage 34a and pilot solenoid valve side pilot passage 35a for communicating the output port A1 of
Of the holes 32 are opened below and at intervals in the up-down direction, and at the same height position as the opening position of the supply passage 33a.
A passage 36 that connects a and 32b is formed in a substantially horizontal direction.

Further, a pilot passage 34b on the main valve side and a pilot passage 35b on the pilot solenoid valve side, which connect the pilot chamber 22b and the output port A2 of the pilot solenoid valve 14b, are opened at intervals in the vertical direction (see FIG. 2). ), Discharge ports R1 and R2 and discharge port EA of main valve 2
To the common exhaust passage 37 for communicating the pilot valve 14
A check valve 38 is provided which allows only the outflow of the fluid from a and 14b to the discharge port EA (see FIG. 3).

The manual operating portion 15a slidably inserted into the hole 32a connects the supply passages 33a and 33b and the pilot passages 34a and 35a to each other when not operated, and presses the supply passage 33a and the pilot passage 34a. The pilot passages 34a and 35a are configured to be communicated with each other and to be disconnected from each other (see FIG. 1). The manual operation portion 15b inserted into the hole 32b connects the pilot passages 34b and 35b to each other when not in operation, and is pressed to pass the supply passage 33a and the pilot passage 34b through the passage 36.
The pilot passages 34b and 35b.
Is configured to cut off communication (see FIG. 2).

Reference numeral 43 in the drawing is a detent mechanism for holding the switching position of the spool 21, and 44a and 44b are stopper pins of the manual operation portions 15a and 15b.

In the above embodiment, the manual operation parts 15a and 15b are used.
When the solenoid 25a is excited in the state shown in the figure, the pilot fluid output from the pilot solenoid valve 14a is supplied to the pilot chamber 22a, the spool 21 moves to the first switching position, and the solenoid 25a is de-energized. Then, when the solenoid 25b is excited, the pilot fluid output from the pilot solenoid valve 14b is supplied to the pilot chamber 22b, and the spool 21 moves to the illustrated second switching position.

When the pilot solenoid valves 14a and 14b become inoperable at the time of trial run before the electrical connection to the solenoid of the pilot solenoid valve, when performing the adjustment operation separately from the electric control, or when an accident such as a power failure occurs. When the manual operation portion 15a is pressed, the supply passage 33a and the pilot passage 34a communicate with each other to supply the pressurized fluid to the pilot chamber 22a, so that the spool 21 moves to the first switching position. Further, when the manual operation portion 15b is pressed, the supply passage 3
3a communicates with the pilot passage 34b through the passage 36 to supply the pressurized fluid to the pilot chamber 22b, so that the spool 21 moves to the second switching position.

In this case, the manual operation parts 15a, 15b
Are collectively provided on the adapter plate 13,
Moreover, since it can be operated from above, the operation is easy. Further, by providing these manual operation parts in the direction (width direction) orthogonal to the axial direction of the main valve 12 in the adapter plate 13, not only the installation space can be reduced, but also the main valve 12 and the pilot solenoid valve 14a. , 14b do not intersect with each other, the formation of these passages is easy, and the adapter plate 13 can be made compact.

FIG. 5 shows a second embodiment of the present invention. This double pilot type solenoid valve 46 comprises a main valve 47 and two pilot solenoid valves 48a and 48b having separate bodies. Other configurations and operations of the second embodiment are substantially the same as those of the first embodiment.

[0022]

[Effect of the Invention] The double pilot type solenoid valve of the present invention is
Since the two manual operation parts are collectively installed on the adapter plate and can be operated from above the adapter plate, the operability of the manual operation part is improved.

Further, since these manual operating portions are provided in the direction orthogonal to the axial direction of the main valve, the passages for connecting the main valve and the pilot solenoid valve do not intersect, so that the passage structure of the adapter plate is simple. The whole can be made smaller.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a different part of FIG.

FIG. 3 is a vertical cross-sectional view of still another different portion.

FIG. 4 is a perspective view of a main part.

FIG. 5 is a perspective view of a main part of the second embodiment.

FIG. 6 is a front view of a known double solenoid type solenoid valve.

[Explanation of symbols]

 11,46 Double pilot type solenoid valve 12,47 Main valve 13 Adapter plate 14a, 14b, 48a, 48b Pilot solenoid valve 15a, 15b Manual operation part 22a, 22b Pilot chamber

Claims (1)

[Scope of utility model registration request] 1. A main valve, two pilot solenoid valves for supplying / discharging pilot fluid to / from each pilot chamber on both axial sides of the main valve, and two manual operation parts for supplying pressure fluid to the pilot chamber. In a double pilot type solenoid valve equipped with, an adapter plate arranged on one axial side of the main valve,
The pilot solenoid valve is attached to the adapter plate, and two manual operating parts that can be operated from above the adapter plate are arranged side by side in a direction orthogonal to the axial direction of the main valve. Double pilot type solenoid valve with.