JPH0724712Y2 - Solenoid valve with manual operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a solenoid valve, and in particular, it can be switched to a locked state or a non-locked state at a displacement position of a movable iron core by a manual operation when the core is energized and de-energized. The present invention relates to a technique effectively applied to a solenoid valve having a possible manual operation mechanism.

[Prior Art] In solenoid valves used in fluid pressure equipment, the movable iron core can be switched by manual operation to check the operation during installation or trial operation, adjust the flow rate, or discover the location of a failure during failure. There are those equipped with a manual operation mechanism.

For example, a single solenoid type solenoid valve with a manual operation mechanism is composed of a main valve main body, a pilot valve main body, a solenoid, etc., and is a pilot formed at the joint between the pilot valve main body and the solenoid. A movable iron core is housed in the chamber so as to be displaceable in the axial direction. Further, a manual operation mechanism is arranged in the pilot valve main body in the intersecting axis direction, the manual operation mechanism is brought into contact with the outer end surface of the movable core, and the movable core is provided so as to be displaceable to the fixed core side.

When the manual button of the manual operation mechanism is pushed toward the movable iron core, the movable iron core abutted against the manual button is displaced to the fixed iron core side, and accordingly, the movable iron core is displaced when energized and de-energized. It has a structure that can be switched to.

There are two types of manual operation mechanism: a lock type that can be held when the movable iron core is switched to the displacement position when energized, and a non-lock type that can be switched only while the manual button is pressed. The manual operation mechanism of can be used in the same way as the non-lock type if the manual button is not rotated.

For example, in a solenoid valve provided with a lock-type manual operation mechanism, it is rotated to a predetermined angle when the manual button is pressed, and locked when switched to a displacement position when energized. Then, the locked state is released by further rotating from the locked state,
It is returned to the displaced position when it is not energized.

Therefore, this lock-type solenoid valve with a manually operated mechanism requires a long time, such as finding a fault location and pursuing the cause of a fault, especially when a fluid pressure device including a solenoid valve fails. Applied when

[Problems to be Solved by the Invention] However, in the above-described conventional technique, the manual button is rotated while being pressed, so that the stroke required to switch the movable core to the displacement position at the time of energization is equal to or more than the stroke required. Stroke is required in the direction in which the manual button is pushed.

Therefore, when the stroke of the manual button is pushed in the direction of the cross axis, the locked state of the manual button is possible in the short stroke, but the seal structure on the contact surface between the manual button and the solenoid valve body is sufficient. However, there is a problem that internal fluid pressure leaks.

Further, since the manual button is locked at a predetermined rotation angle, there is a problem that the manual button is rotated by a slight contact and the locked state is released.

Therefore, an object of the present invention is to enable switching of a locked state or a non-locked state at a displacement position when the movable core is energized and de-energized, so that the locked state can be reliably maintained and at the same time fluid pressure leakage can be prevented. It is to provide a solenoid valve with a manually operated mechanism that enables

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] Among the inventions disclosed in the present application, the outline of a typical one will be briefly described as follows.

That is, the solenoid valve with a manual operation mechanism according to the present invention is arranged in an axial direction with respect to the displacement direction of the movable iron core, and is brought into contact with the outer end surface of the movable iron core to switch the displacement position of the movable iron core. It is applied to a solenoid valve equipped with a manual operation mechanism that can be locked or locked.
As the manual operation mechanism, an inclined surface that is in contact with the outer end surface of the movable iron core is formed, and a manual operation part that is operated by pushing against the urging force of the spring, and protruding from the operation surface of the manual operation part. An adjusting portion disposed to adjust the displacement of the manual operating portion toward the movable iron core by rotation, and screwed rotatably with the adjusting portion within a predetermined range to lock the displacement of the adjusting portion. And a holding section for holding the movable iron core in a non-locked state or a locked state.

[Operation] According to the solenoid valve with a manual operation mechanism described above, the manual operation unit, the adjustment unit that adjusts the displacement of the manual operation unit, and the holding unit that allows the adjustment unit to rotate and retain the displacement thereof are used. When the movable iron core is driven in the non-locked state by providing the configured manual operation mechanism, the movable iron core is driven from the non-energized displacement position to the energized displacement position by pushing the manual operation part. Further, when the movable iron core is driven in the locked state, it is possible only by rotating the adjusting portion that is rotatably screwed into the holding portion, and the manual operation portion is pushed in interlocking with the rotation of the adjusting portion. Thus, the movable iron core can be driven from the displaced position when not energized to the displaced position when energized.

As a result, the locked state of the movable core can be reliably maintained, and at the same time, leakage of fluid pressure can be prevented.

[Embodiment] FIG. 1 is a sectional view showing a solenoid valve according to an embodiment of the present invention.
FIG. 2 is a sectional view showing a manual operation mechanism used in the solenoid valve of this embodiment.

First, the structure of the solenoid valve of this embodiment will be described with reference to FIG.

The solenoid valve of the present embodiment is, for example, a single solenoid type indirect actuation type solenoid valve, and is composed of a main valve body portion 1, a pilot valve body portion 2 and a solenoid portion 3. The valve body 1 and the solenoid 3 are coaxially connected.

The main valve body 1 has an input port 4a, a first discharge port 4b and a second discharge port 4c, which are connected to a fluid pressure source (not shown) on the lower side surface thereof, and a first output which is connected to a fluid pressure operating device (not shown). Port 4d and second output port 4e are open.

Further, a shaft hole 5 is formed inside the main valve body 1 along the axial direction thereof, and the valve seat 5a is formed on the inner peripheral surface of the shaft hole 5 at a predetermined interval along the axial direction. Are installed around. The shaft hole 5 has a large diameter portion 6a which is brought into contact with and separated from each valve seat 5a.
The main shaft 6 in which is formed is movably inserted along the axial direction.

Further, pistons 7 and 8 are respectively brought into contact with both end surfaces of the main shaft 6, and these pistons 7 and 8 are connected to the working fluid chamber 10 inside the end cover 9 and the working fluid chamber inside the pilot valve body 2.
Each of them is housed in 11 so as to be displaceable along the axial direction. The pressure receiving area of the piston 7 is smaller than that of the piston 8, and the right side fluid chamber of the working fluid chamber 10 partitioned by the piston 7 is communicated with the outside through a flow hole (not shown). On the other hand, the left side fluid chamber of the working fluid chamber 11 partitioned by the piston 8 communicates with the outside through the flow passage 11a.

The right side fluid chamber of the working fluid chamber 11 is communicated with the outside through a flow passage 11b, and the flow passage 11b is opened and closed by a flapper 12 in the right side fluid chamber. And
The flapper 12 is biased to the right in FIG. 1 by a spring 12a, and the spring 12a causes the spring guide 13
Supported by.

Further, a pilot chamber 14 is formed at the connecting portion between the pilot valve main body 2 and the solenoid portion 3, and the pilot chamber 14 and the working fluid chamber 11 are communicated with each other through the flow passage 14a. The pilot chamber 14 has a pilot flow passage 14
is connected to the input port 4a through b, while the working fluid chamber 1
0 is communicated with the input port 4a through the pilot flow passage 10a.

In addition, the pilot chamber 14 has a plunger (movable iron core) 15
Is displaceably inserted along the axial direction of the plunger 15, and the pilot flow passage 14b is opened and closed by the pilot valve body 15a embedded in the left end surface of the plunger 15. And the plunger 15 is the plunger spring 15
It is urged to the left in FIG. 1 by b and is linked to the flapper 12 via a plunger pin 16 inserted in the flow passage 14a.

Further, the pilot valve main body 2 is formed with a through hole 17 through which the outer end surface of the pilot valve main body 2 and the pilot chamber 14 are penetrated along the intersecting axis direction. A manual operating mechanism 18 including a manual button 18a that is an operating portion, an adjusting knob 18b that is an adjusting portion, a stopper 18c that is a holding portion, and the like is axially arranged in the through hole 17.

Further, in the manual button 18a, the manual operation mechanism 18 has the plunger 1
Since it is arranged in the direction of the axis intersecting with the displacement direction of 5, the inclined surface that abuts the outer end surface of the plunger 15 is formed at the tip end thereof, and the large diameter portion of the manual button 18a and the through hole 17 Of the adjusting knob 18b that is provided in a direction that is displaced outward by the urging force of the spring 18d that is locked to the protrusion of the adjustment knob 18b that is locked to the stopper 18c that is screwed to the outer end of the through hole 17. It is stopped at the position where it abuts the end.

Further, the adjustment knob 18b is disposed so as to project from the operation surface of the manual button 18a so as to cover the manual button 18a so that the manual button 18a is not displaced by an unexpected contact or the like. Retaining ring 1 to be fitted
By 8e, it is screwed so as to be rotatable along the threaded portion within a predetermined range. In addition, the manual button 18a and stopper 18c
O-rings 18f and 18g are fitted to the inner peripheral surface of the above and the contact surface between the stopper 18c and the adjusting knob 18b, and the fluid pressure of the pilot chamber 14 is prevented from leaking to the outside through the contact surface.

When the manual button 18a is pushed inward from the outside against the biasing force of the spring 18d, the tip of the manual button 18a is brought into contact with the left end surface of the plunger 15 and the plunger 15 is not energized. It has a structure in which the displacement position can be switched to the displacement position when energized.

Further, the adjustment knob 18b is rotated clockwise along the threaded portion of the stopper 18c and displaced inward,
The manual button 18a is pushed inward against the urging force of the spring 18d, and the plunger 15 can be switched to the displacement position when energized in the locked state. Further, when the adjusting knob 18b is rotated counterclockwise, the manual button 18a is returned to its original state by the urging force of the spring 18d.

The solenoid portion 3 includes a frame 20 whose outer end side is closed by a solenoid cover 19, and a solenoid coil 22 wound around a bobbin 21 is provided inside the frame 20.
It is molded with a resin material such as epoxy. In addition, a fixed core (fixed iron core) 24 is provided in the center hole 23 of the bobbin 21.
Is inserted halfway and a drive voltage is applied to the solenoid coil 22, so that an electromagnetic force is generated between the fixed core 24 and the plunger 15.

Next, the operation of this embodiment will be described.

First, the case where the manual operation mechanism 18 is operated in the non-locked state will be described.

FIG. 1 shows a state in which the manual operation mechanism 18 is not operated, and the plunger (movable iron core) 15 is displaced leftward by the urging force of the plunger spring 15b, and is in the displacement position when not energized. .

First, the manual button (manual operation part) 18a of the manual operation mechanism 18
When is pushed inward against the urging force of the spring 18d, the tip end of the manual button 18a is brought into contact with the left end surface of the plunger 15 and the plunger 15 is displaced toward the fixed core 24 side. Is switched from the displacement position when not energized to the displacement position when energized.

Then, by switching the plunger 15 to the displacement position in the energized state, the pilot flow passage 14b is opened, and the fluid pressure from the fluid pressure source (not shown) is transmitted from the input port 4a to the pilot flow passage 14b, the pilot chamber 14, the flow passage. It flows into the working fluid chamber 11 through 14a. Then, the piston 8 in the working fluid chamber 11 is displaced leftward, and at the same time, the main shaft 6 is also displaced leftward in conjunction therewith.

In this state, when fluid pressure such as air pressure is supplied to the input port 4a from a fluid pressure source (not shown), the cylinder (not shown) connected from the second output port 4e to the second output port 4e via the shaft hole 5 It is supplied to fluid pressure actuated devices such as devices. The fluid pressure discharged from the fluid pressure actuating device is discharged from the first output port 4d through the shaft hole 5 to the outside through the first discharge port 4b.

Then, the pushing of the manual button 18a is released, and the urging force of the plunger spring 15b causes the plunger 15 to be switched from the displaced position when energized to the displaced position when not energized.

Then, by switching the plunger 15 to the displacement position in the non-energized state, the pilot flow passage 14b is closed and the fluid pressure from the fluid pressure source (not shown) is applied to the input port 4a.
Flows into the working fluid chamber 10 through the pilot flow passage 10a. Then, the piston 7 in the working fluid chamber 10 is displaced to the right, and at the same time, the main shaft 6 is interlocked and displaced to the right.

At this time, with the displacement of the plunger 15, the flapper 12 is displaced leftward in FIG. 1 against the biasing force of the spring 12a, and the flow passage 11b is opened, so that the right fluid chamber of the working fluid chamber 11 is opened. The fluid pressure is discharged to the outside through the flow passage 11b.

In this state, the fluid pressure supplied to the input port 4a is transmitted from the first output port 4d via the shaft hole 5 to the first output port 4d.
It is supplied to a fluid pressure operated device connected to the output port 4d. The fluid pressure discharged from the fluid pressure actuating device is discharged from the second output port 4e through the shaft hole 5 to the outside through the second discharge port 4c.

In this way, when the manual operation mechanism 18 is operated in the non-locked state, the plunger 15 can be switched to the displacement position at the time of energization only when the manual button 18a is pushed inward.

Next, a case will be described in which the plunger (movable iron core) 15 is in a locked state at a displacement position when energized.

First, the adjustment knob (adjustment section) 18b of the manual operation mechanism 18
When the stopper (holding portion) 18c is rotated in the clockwise direction along the threaded portion, the adjustment knob 18b is displaced inward in accordance with the rotation, and the large diameter portion is brought into contact with the distal end portion of the manual button ( The manual operation part) 18a is pushed inward against the biasing force of the spring 18d.

Then, the rotation of the adjusting knob 18b is stopped in the state where the manual button 18a is pushed in, and the plunger 15 abutting on the tip end of the manual button 18a is displaced to the fixed core 24 side, so that the plunger 15 is energized. It is in the locked state when it is switched to the displacement position at that time.

At this time, similarly to the above, as the fluid pressure flows into the working fluid chamber 11, the main shaft 6 is displaced to the left, and the fluid pressure supplied to the input port 4a is applied to the fluid pressure operating device from the second output port 4e. The fluid pressure that is output and discharged from the fluid pressure actuated device flows in from the first output port 4d, and the first discharge port 4b
More discharged to the outside.

Then, the adjustment knob 18b of the manual operation mechanism 18
When it is rotated counterclockwise along the threaded portion of 8c, the adjustment knob 18b is displaced outward with the rotation, and the manual button 1
8a is returned to its original state by the urging force of the spring 18d.

Then, the plunger 15 abutting on the tip of the manual button 18a is switched from the displacement position when energized to the displacement position when not energized by the urging force of the plunger spring 15b.

At this time, similarly to the above, as the fluid pressure flows into the working fluid chamber 10, the main shaft 6 is displaced to the right, and the fluid pressure supplied to the input port 4a is transferred to the fluid pressure operating device from the first output port 4d. The fluid pressure output and discharged from the fluid pressure actuated device flows in through the second output port 4e, and the second discharge port 4c.
More discharged to the outside.

As described above, when the manual operation mechanism 18 is operated in the locked state, while the rotation of the adjustment knob 18b is stopped while the manual button 18a is pushed inward,
The plunger 15 can be reliably held at the displaced position when energized.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the invention. There is no end.

For example, although the solenoid valve of the present embodiment has been described as a single solenoid type indirect actuation type solenoid valve, the solenoid valve provided with the manual operation mechanism 18 of the present invention is not limited to the above embodiment, and a double valve is used. A plunger that is displaced by a manual operating mechanism 18, such as a solenoid type solenoid valve.
Widely applicable to solenoid valves with 15.

[Effects of the Invention] The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

(1). A manual operation mechanism capable of switching the displacement position of the movable iron core is provided with a manual operation portion that is operated against the biasing force of the spring, and an adjustment portion that adjusts the displacement of the manual operation portion to the movable iron core side. When the movable iron core is driven in the non-locked state, since the adjusting portion is screwed to the holding portion so as to be rotatable within a predetermined range by including the holding portion that holds the displacement of the adjusting portion in the locked state. When the movable iron core is driven from the displacement position when not energized to the displacement position when electricity is applied by pushing the manual operation part, and when the movable iron core is driven in the locked state, the holding part is rotatably screwed. It is possible only by rotating the adjustment part to be combined, and the manual operation part is pushed in interlocking with the rotation of this adjustment part to drive the movable iron core from the displacement position when not energized to the displacement position when energized. it can.

(2). According to the above (1), since the adjustment unit that determines the displacement of the manual operation unit is held in the locked state by the holding unit,
The movable iron core can be securely held in the locked state.

(3). According to the above (1), since the seal member can be attached to the contact surface between the manual operation portion and the solenoid valve main body within a predetermined range, the sealability of the contact surface is improved and the leakage of fluid pressure can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a solenoid valve which is an embodiment of the present invention,
FIG. 2 is a sectional view showing a manual operation mechanism used in the solenoid valve of this embodiment. 1 ... Main valve body, 2 ... Pilot valve body, 3 ...
Solenoid part, 4a ... input port, 4b ... first discharge port, 4c ... second discharge port, 4d ... first output port, 4e
…… Second output port, 5 …… Shaft hole, 5a …… Valve seat, 6 ……
Main shaft, 6a ... Large diameter part, 7 ... Piston, 8 ... Piston, 9 ... End cover, 10 ... Working fluid chamber, 10a ...
Pilot flow passage, 11 …… Working fluid chamber, 11a …… Flow passage, 11b …… Flow passage, 12 …… Flapper, 12a …… Spring, 13 …… Spring guide, 14 …… Pilot chamber, 14
a …… flow passage, 14b …… pilot flow passage, 15 …… plunger (movable iron core), 15a …… pilot valve body, 15b …… plunger spring, 16 …… plunger pin, 17 …… through hole, 18 …… Manual operation mechanism, 18a …… manual button (manual operation part), 18b …… adjustment knob (adjustment part), 18c …… stopper (holding part), 18d …… spring, 18e …… stop ring,
18f …… O ring, 18g …… O ring, 19 …… solenoid cover, 20 …… frame, 21 …… bobbin, 22 …… solenoid coil, 23 …… center hole, 24 …… fixed core (fixed iron core).

Claims (1)

[Scope of utility model registration request] 1. A movable core is disposed in a direction intersecting with a displacement direction of the movable core, and the movable iron core is brought into contact with an outer end surface of the movable core so that the displacement position of the movable core can be switched in a non-locked state or a locked state. An electromagnetic valve having a manual operation mechanism, wherein the manual operation mechanism has an inclined surface formed in contact with an outer end surface of the movable core, and is operated manually by pushing against an urging force of a spring. An operating portion, an adjusting portion that is disposed so as to project from the operating surface of the manual operating portion, and that adjusts the displacement of the manual operating portion toward the movable iron core by rotating, and rotates with the adjusting portion within a predetermined range. When the movable iron core is driven in a non-locked state, the movable iron core is not locked by a pushing operation of the manual operation part. Displacement position when energized When the movable iron core is driven to the displaced position at the time of energization and the movable iron core is driven in the locked state, it is possible only by rotating the adjusting portion that is rotatably screwed into the holding portion. A solenoid valve with a manual operation mechanism, characterized in that the manual operation part is pushed in interlocking with rotation to drive the movable core from a displacement position when not energized to a displacement position when energized.