JPH0239096Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solenoid valve for supplying gaseous or liquid fuel.

[Prior Art] Solenoid valves for fuel supply, which have traditionally been used as gas safety devices in general households, are closed by cutting off electricity, so fuel supply is not interrupted in the event of a power outage. , even if there is a need to supply fuel, it cannot be done.

In order to solve this problem, it is considered to attach a manual operation device to the solenoid valve to enable manual opening, in order to enable fuel supply even if the fuel supply control function by the solenoid valve is lost due to a power outage. It will be done.

However, with the solenoid valve equipped with this manual operation device, if you forget to release the manual release when the power supply is resumed, the valve will remain open, so the solenoid valve will continue to supply fuel even after the power supply is resumed. The disadvantage is that the control function is not restored.

Therefore, the present inventor previously proposed a solenoid valve for solving such problems in Utility Model Application No. 189601/1983. This previously proposed solenoid valve is designed to automatically release the manual valve-open state when the power supply is resumed, but when manually opening the valve, it is necessary to press and rotate the push rotor. Further improvement in operability was desired. In particular, this type of solenoid valve is not often manually operated, and when manual operation is required, it is often necessary to operate it immediately, and furthermore, there is no risk of accidentally operating it while energized. It is desirable to be able to open the valve with a simple operation, since this will not cause any problems.

[Problems to be solved by the invention] The invention has a manual operating device attached to a solenoid valve.
When the power supply is resumed, the manual valve-open maintenance state is automatically released, and the disadvantage is that the solenoid valve is used in a state where the fuel supply control function has not been recovered due to forgetting to release the manual operation device. The purpose of this invention is to solve this problem and to facilitate the operation of a manual operation device.

[Means for Solving the Problems] The present invention has a valve body having an inflow passage, an outflow passage, and a valve seat formed between both passages, and a movable iron core provided with a valve member for opening and closing the valve seat. In a solenoid valve comprising an electromagnetic part, the valve body is provided with a push button to which a return force is applied by a return spring, and when the push button is pushed, it engages the engaging member provided on the movable iron core. an inclined surface that contacts and moves the movable iron core in the valve opening direction; and a locking groove that maintains the valve member in the intermediate open state by engaging with the engaging member when the valve member is in the intermediate open state. The stroke of the valve member from the intermediate open state to the fully open state is made larger than the depth of engagement between the engaging member and the locking groove, thereby solving the above problem.

[Operation] When the valve member closes the valve seat due to a power outage,
By pushing the push button against the return spring, the inclined surface comes into contact with the engaging member and moves the movable core in the valve opening direction, and the locking groove engages with the engaging member in the intermediate open state. This causes the valve member provided on the engaging member to be in an intermediate open state. Therefore, the flow of fuel can be restarted. The above operations can be performed easily by simply pressing the push button.

Even if the pressure on the push button is released after the valve member is brought into the intermediate open state, the engaged state is maintained and the valve member is maintained in the intermediate open state.

When the power supply is resumed, the valve member becomes fully open due to the reactivation of the electromagnetic part, and the engagement of the locking groove with the engagement member is caused by the stroke of this valve member from the intermediate open state to the fully open state. is released and the push button is returned from the pressed state by the return spring, so the solenoid valve returns to its normal control state.

[Embodiment] In the embodiment shown in FIGS. 1 and 2, an inflow passage 2 and an outflow passage 3 are opened in the valve body 1 connected to the fuel distribution pipe, and a valve seat 4 is formed between these passages. has been done. Further, the valve body 1 is formed with a protruding wall 5 having an open upper end above the valve seat 4, and the protruding wall 5 has an open end for incorporating a manual operating device 8 orthogonally thereto. annular protrusion 6
is formed at the base end of the annular protrusion 6.
A narrow supporting wall 7 extending from the opening side of the protruding wall 5 is integrally provided.

On the other hand, the electromagnetic section 9 composed of the excitation coil 10 wound around a bobbin, the fixed iron core 11, the magnetic frame 12, the magnetic plate 13, the movable iron core 14, etc. It is placed and fixed in the opening of the protruding wall 5. Also,
A guide tube 16 made of a non-magnetic material whose end protrudes into the protruding wall 5 through the opening of the flange 15 is fitted into the center hole of the bobbin, and the movable iron core 14 is attached to the guide tube 16. It is slidably inserted.

A valve plate 17 is fixed to one end of the movable iron core 14 by a stop member, and a valve member 18 made of an elastic body is attached to the valve plate 17.
An engaging member 19 that also serves as a cup-shaped spring holder is fixed to the surface of 7 opposite to the valve seat. The member 18 is biased in a direction to close the valve seat 4. Furthermore, a bent locking portion 21 is formed in the engaging member 19 by further bending a flange-shaped edge provided on the outer periphery toward the valve seat 4 side.

On the other hand, a push button 23 is inserted into the annular protrusion 6 of the valve body 1 so as to be pushable. The push button 23 has a blind hole 24 with an open end, and is biased toward the opening of the annular protrusion 6 by a return spring 25 compressed between the bottom of the blind hole 24 and the support wall 7. A retaining ring prevents the opening plate from slipping out.

Further, the push button 23 is inserted into the valve body with the supporting wall 7 in between, and has side walls 28, 28 having an inclined surface 27 formed at the tip thereof, and a locking groove 29 on the upper surface side, These inclined surfaces 27, 27 and the locking groove 2
9 and the bending locking portion 21 of the engagement member 19 is such that when the push button 23 is pushed in against the biasing force of the return spring 25, the inclined surface 27 moves into the bending locking portion 2.
1 against the biasing force of the valve spring 20 to move the valve member 18 to an intermediate open state. They are disposed so as to be locked in the groove 29, and together constitute the manual operating device 8.

The open end of the annular protrusion 6 is connected to the elastic cap 3.
1, and the push button 23 can be pushed into the valve body 1 by pressing the cap 31.

In a normal state, the solenoid valve configured as described above operates in the same manner as a periodic solenoid valve, opens and closes a fluid passage, and controls the supply of fuel.

When the power supply to the excitation coil 10 is cut off due to a power outage, the valve member 18 closes the valve seat 4 by the urging force of the valve spring 20, and the flow of fuel stops. In this state, in order to open the valve member 18 manually, when the push button 23 is pushed against the return spring 25, the inclined surfaces 27, 27 are brought into contact with the bent locking portion 21 of the engagement member 19.
At the same time, the bent locking portion 21 engages with the engagement groove 29 in the intermediate open state of the valve member, thereby causing the valve member 18 to open the valve seat 4 in the intermediate position. do. Therefore, by the above-mentioned manual operation, fuel supply can be restarted even in the event of a power outage.

After opening the valve by pressing the push button 23, the push button 23
Even if the pressing force is released, the locking groove 29 of the push button 23
is locked by the bent locking portion 21 of the engaging member 19, so the push button 23 is not pushed back by the return spring 25. Further, since the mutual engagement depth between the locking groove 29 and the bent locking portion 21 is formed to be smaller than the remaining stroke of the movable core 14 at the intermediate position, the above-mentioned When the power supply is restarted in the intermediate open state and the excitation coil 10 is excited, the fixed core 11 attracts the movable core 14 in the intermediate position by the remaining stroke and the valve member 18 is fully opened. The locking groove 29 and the bent locking portion 21 are locked with a smaller engagement depth by the stroke of 14.
The lock between the two buttons is released, and the push button 23 is returned to its original position by the return spring 25.

Therefore, as soon as the power supply is resumed, the manual operating device is automatically released and the solenoid valve returns to its normal opening/closing control state.

[Effects of the invention] This invention is equipped with a manual operation device, so
When the flow of fuel is stopped due to a power outage, the manual operating device is used to slide the valve member through the engagement member to an intermediate open position and maintain this state to restart the flow of fuel. In addition, the above-mentioned manual operation device is extremely easy to operate because the above-mentioned operation can be performed simply by pushing the push button into the valve body.

Furthermore, when the power supply is resumed, the engaging member immediately slides to release the engagement between the locking groove of the manual operating device and the engaging member, and the manual operating device is automatically returned to its original state. It is possible to avoid forgetting to release the manual operation device due to resumption of power supply, and it is possible to improve the fuel supply control function of the solenoid valve.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, and FIG. 2 is an enlarged view of main parts taken along line A-A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Valve body, 2... Inflow passage, 3... Outflow passage, 4... Valve seat, 9... Electromagnetic part, 14... Movable core, 18... Valve member, 19... Engagement member, 23 …
...Push button, 25...Return spring, 27...Slanted surface, 2
9...Latching groove.

Claims (1)

[Scope of utility model registration request] A solenoid valve comprising a valve body having an inflow passage, an outflow passage, and a valve seat formed between both passages, and an electromagnetic part having a movable iron core provided with a valve member for opening and closing the valve seat, the valve body having: A push button to which a return force is applied by a return spring is provided, and when the push button is pushed, the push button comes into contact with an engaging member provided on the movable core and moves the movable core in the valve opening direction. and a locking groove that maintains the valve member in the intermediate open state by engaging with the engaging member in the intermediate open state of the valve member, and the valve member is changed from the intermediate open state to the fully open state. A fuel supply solenoid valve characterized in that the stroke of the engaging member is greater than the depth of engagement between the engaging member and the locking groove.