JPH0238148Y2 - - Google Patents

Description

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

[Conventional technology]

Conventionally, solenoid valves for fuel supply, which have been used as gas safety devices in general households, are closed by cutting off the electricity, so fuel supply is interrupted during a power outage and the fuel supply is no longer required. You can't do it even if you have.

In order to solve this problem, it is considered to attach a manual operation device to the solenoid valve to enable manual opening, so that fuel can be supplied 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 degree of power supply resumption will also be affected by the fuel supply by the solenoid valve. The disadvantage is that the control function is not restored.

[Problem that the invention attempts to solve]

This invention uses a manual operation device attached to a solenoid valve to
When the power supply is resumed, the manual valve-open maintenance state is automatically released, so that if the manual operation device is forgotten to release the solenoid valve, the solenoid valve is used in a state where the fuel supply control function has not been recovered. The purpose is to eliminate shortcomings.

[Means for solving problems]

The present invention provides an electromagnetic valve comprising a valve body having an inflow 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. , a press rotator to which a return force is applied by a return spring is inserted so as to be rotatable and pushable, and the press rotator is pushed into an eccentric position and rotated, thereby achieving the above movable state. A locking rod having a locking flange that engages with an engaging member provided on the iron core to maintain the valve member in an intermediate open state is provided, and the stroke of the valve member from the intermediate open state to the fully open state is controlled. The above problem is solved by making the engagement length longer than the engagement length of the engagement flange that engages the engagement member.

[Effect]

When the valve member closes the valve seat due to a power outage,
By rotating the pressing rotator while pushing it against the return spring, the locking flange is slid into engagement with the engaging member, and the valve member provided on the engaging member is brought into an intermediate open state. As a result, fuel flow can be resumed. Even if the pressure of the pressing rotator 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 flange with the engagement member is caused by the stroke of the valve member from the intermediate open state to the fully open state. Since the pressing rotor is released from the pressed state by the return spring, the solenoid valve returns to its normal control state.

〔Example〕

In the embodiment shown in FIGS. 1 and 2, an inflow passage 2 and an outflow passage 3 are opened in a valve body 1 connected to a fuel distribution pipe, and a valve seat 4 is formed between these passages. There is. Further, the valve body 1 is formed with a protruding wall 5 having an open upper end on the valve seat 4, and an annular protruding portion 6 having an open end perpendicular to the protruding wall 5. An arcuate slot 7 is formed in the portion of the protruding wall 5 that is surrounded by the annular protruding portion 6 .

On the other hand, the electromagnetic section 9, which is 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., is connected to the electromagnetic section 9 through a flange 17 having an opening in the center. The valve body 1 is placed in the opening of the protruding wall 5 and attached to the valve body 1 by appropriate means. Further, a guide tube 18 made of a non-magnetic material whose end portion protrudes into the protruding wall 5 through the opening of the flange 17 is fitted into the center hole of the bobbin.
is slidably inserted into the guide tube 18.

A valve plate 21 is fixed to one end of the movable iron core 14 by a stop member, and a valve member 22 made of an elastic body is attached to the valve plate 21.
1, an engaging member 23 which also serves as a cup-shaped spring holder is fixed by appropriate means to the surface opposite to the valve seat, and is engaged by a valve spring 25 interposed between the flange 17 and the spring holder. Accordingly, the valve member 22 is biased in a direction to close the valve seat 4.

The engaging member 23 has a flange-like edge on its outer periphery further bent toward the valve seat 4 side, so that
A bending locking portion 26 is formed, and a press rotator 30 is inserted into the annular protrusion 6 so as to be rotatable and pushable. Although the annular protrusion 6 is biased toward the opening side by the return spring 32 interposed therebetween, it is prevented from slipping out from the opening by appropriate means (not shown). . The pressing rotator 30 also has a locking member which is inserted into the valve body 1 through the arc-shaped slot 7 formed in the projecting wall 5 and has a locking flange 33 formed at its tip. The rod 34 is fixed at an eccentric position, and the locking collar portion 33 and the bent locking portion 26 of the engaging member 23 are engaged with each other by rotating the pressing rotator 30 in a depressed state. The valve member 22 is arranged in a positional relationship such that the valve member 22 can be displaced to open the valve against the biasing force of the valve spring 25 by the rotation thereof, and the manual operating device 35 is constituted by these. There is.

In addition, as shown by the chain line in the figure, the pressing rotator 3
If a knob is formed at 0, it becomes easy to press and rotate the push button, which will be described later.

In normal conditions, the above-mentioned solenoid valve operates in the same manner as a known solenoid valve to open and close a fluid passage and control the supply of fuel. The stroke of the movable iron core 14 in this case is _L1 .

When the power supply to the excitation coil 10 is cut off due to a power outage, the valve member 22 closes the valve seat 4 by the biasing force of the valve spring 25, and the flow of fuel stops. In this state, in order to manually open the valve member 22, the pressing rotator 30 is rotated while being pushed in against the return spring 32. Locking collar portion 33 of pressing rotator 30
is displaced inwardly from the bending locking portion 26 of the engaging member 23 by pushing the pressing rotator 30,
Due to the rotation, the bending locking portion 26 of the engaging member 23
As shown in FIG. 2, the engaging member 23
The movable iron core 14 is moved to an intermediate position where the gap with the fixed iron core 11 is _L2 through the valve opening displacement, and the valve member 22 opens the valve seat 4 at the intermediate position. Therefore, by operating the manual operating device, fuel supply can be resumed even if the power is interrupted.

Even if the pressing force of the pressing rotary element 30 is released after the valve is opened by pushing and rotating the pressing rotary element 30, the locking flange part 33 of the pressing rotary element 30 will not fit into the bent locking part of the engaging member 23. 26, the return spring 32
The pressing rotator 30 will not be pushed back by this.

Further, the mutual engagement length L ₃ between the locking collar portion 33 and the bent locking portion 26 is formed to be smaller than the gap L ₂ described above.

In the above state, when the power supply is restarted and the excitation coil 10 is excited, the fixed core 11 attracts the movable core 14 in the intermediate position by a stroke L ₂ to fully open the valve member 22. The locking flange ₃ is locked with a smaller engagement length _L3 due to the stroke L2 of the iron core 11.
3 and the bending locking portion 26 is released, and the pressing rotator 30 is returned to its original position by the return spring 32.

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.

[Effect of idea]

This invention is equipped with a manual operating device, so when the fuel flow stops due to a power outage, the manual operating device can slide the valve member to the intermediate open position via the engagement member. This state can be maintained to restart the fuel flow.

Furthermore, when the power supply is resumed, the engaging member immediately slides to release the engagement between the locking flange 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 drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention, and FIG. 2 is a vertical sectional front view showing the operating state of the manual operating device in FIG. DESCRIPTION OF SYMBOLS 1... Valve body, 2... Inflow passage, 3... Outflow passage, 4... Valve seat, 9... Electromagnetic part, 14... Movable core, 22... Valve member, 23... Engagement member, 30 …
...Press rotator, 32... Return spring, 33... Locking collar, 34... Locking rod.

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 pressing rotator to which a return force is applied by a return spring is inserted so as to be rotatable and pushable, and the movable iron core is rotated while being pushed into the eccentric position of the pressing rotator. a locking rod having a locking flange that engages with an engaging member provided in the valve member to maintain the valve member in an intermediate open state;
A fuel supply electromagnetic valve characterized in that a stroke of the valve member from an intermediate open state to a fully open state is longer than an engagement length of a locking flange that is locked to an engagement member.