JPS6327187Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a pilot-type solenoid valve for controlling the flow of high-pressure air when rotating a propeller with high-pressure air to start a generator or engine. The present invention relates to a solenoid valve with a manual opening mechanism, which has a manual valve opening/closing control mechanism independent of the electromagnetic unit in addition to a valve opening/closing control mechanism.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows a sectional view of an embodiment of the present invention, FIG. 2 shows a part of a plan view, and FIG. 3 shows a partial sectional view of a main part.

A cylindrical manual opening mechanism A is fixed to the head of the valve body 24 with a bolt 24a.
An electromagnetic part device B, which is fixed with a locking nut 12, is mounted on the upper part. The valve body 24 is provided with an inlet X and an outlet Y, and has a piston valve body 25 that opens and closes a communication hole 24b that communicates the two ports. The piston valve body 25 has a pressure equalizing hole 25a that communicates with the back surface of the valve body, and the fluid on the inlet side
When the electromagnetic coil is energized, the pilot valve is opened and electrically connected to the exhaust hole 26a which opens into the pilot hole 22c of the manual opening mechanism A to be described later. In the manual opening mechanism A, center holes 22a and 22b are formed from both end faces in a direction perpendicular to the axis of the valve body 24, and both center holes are bored in the center along the axis of the valve body. Electrical conduction is established through the pilot hole 22c. Further, an exhaust hole 26a communicating with the atmosphere is opened in the pilot hole 22c. (3rd
(See figure) The spindle 22 is attached to the guide 21 in the center hole 22a.
is inserted through the central hole 22a,
Spring 2 that constantly biases the spindle 22 to the left in the figure
3 and a press button 2 provided at one end of the spindle.
When the spindle is moved to the right in the figure against the spring 23 at 0, the tip of the spindle is in the center hole 22.
I am trying to reach b. A ball valve 19 is provided in the center hole 22b so as to open and close a valve seat 22d that communicates the center hole 22b and the pilot hole 22c.
When the spindle 22 is forcibly moved to the right by pressing the push button 20 as described above, the ball valve 19 closes the valve seat 22d at the tip of the spindle. It opens. A guide hole 18 having a larger diameter than the pressure equalizing hole 25a is provided which communicates between the cavity on the back surface of the piston valve and the center hole 22b.

The pilot hole 22c is the guide hole 1 when the ball valve 19 is open.
It is electrically connected to the back space of the valve body through 8. Therefore, the pressure in the space behind the piston valve becomes lower than that in the inlet X, causing the piston valve body to float and opening the valve seat 24b.

The electromagnetic part device B consists of an electromagnetic coil 5 wound around a non-magnetic plunger tube 9, a fixed iron core 6 fixedly installed above the plunger tube, a plunger 8 of a movable iron core that slides up and down inside the plunger tube, etc. A pilot valve 14 is provided at the lower end of the plunger 8, and the pilot hole 22c is closed by the plunger spring 7 or the valve spring 13 when the electromagnetic coil 5 is not energized.

With the above configuration, when the electromagnetic coil 5 is de-energized, the plunger 8 is lowered, the pilot hole 22c is closed by the plunger 8, and the exhaust hole 26a and the guide hole 25b are not electrically connected, so that the pressure on the front and rear sides of the valve body 25 is reduced. are balanced, and due to the difference in pressure receiving area, the valve body 25 is pressed against the valve seat 24b.
Close. The energized plunger rises and
The pilot hole 22c is opened and the air on the back of the piston valve is discharged to the exhaust hole 26a via the guide hole 25b, and the amount of air discharged to the exhaust hole 26a is larger than the amount introduced into the back of the piston valve from the pressure equalization hole 25a. A pressure difference is created between the inflow side
It is used to power the rotation of the propeller.

The above shows the normal usage, but
In addition, the present invention has a manual opening mechanism for opening and closing the valve without using an electromagnetic device. If the electromagnetic device becomes de-energized due to a disconnection of the coil or a malfunction of the switch, the function of closing the pilot hole 22c is maintained by the spring, so the electromagnetic device can be left as is and the spring 7, spring 13 is the pilot valve 1
4 to close the pilot hole 22c, block the flow from the guide hole 25b to the exhaust hole 26a, and close the piston valve 25.
To open, press the push button 20 of the manual opening mechanism to the right in FIG.
Against this, the tip displaces the ball valve 19 to the right and opens the valve seat 22d, and the air on the back side of the piston valve 25 passes through the guide hole 18, the valve seat 22d, and the pilot hole 22c, and is conducted to the exhaust hole 26a. A pressure difference is created between the back surface of the piston valve and the inlet X, and the piston valve 25
open. When closing, stop pressing the push button 20, the ball valve 19 will be closed by the action of the springs 23, 17, the pressure on the front surface of the piston valve body 25 will be balanced, and the piston valve 25 will be closed.

Next, in the case of an accident in which the opening and closing of the piston valve is inoperable due to an unknown failure in the electromagnetic unit, priority will be given to operating the generator and engine, and investigation of the cause of the failure will be postponed. Remove the electromagnetic unit B together with the locking nut 12, close the opening of the pilot hole 22c using a previously prepared screw plug (not shown) having the same diameter as the locking nut 12, and open the manual opening mechanism A. The piston valve 25 is opened and closed using the piston valve 25 as described above. For this reason, the electromagnetic unit B is attached by screwing means that can be easily attached and detached.

In this way, you can continue to operate the generator etc. manually for the time being, confirm the cause of the failure part, and if it is a spring failure, take appropriate measures to deal with it. Therefore, the present invention stops the operation of the generator, etc. by having a manual opening mechanism that allows the piston valve to be opened and closed manually without using any mechanism of the electromagnetic part while the pilot hole 22c is closed. It has the effect of being able to be used continuously without any problems or after a short break.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partial plan view, and FIG. 3 is a partial sectional view of the main part. 5... Electromagnetic coil, 6... Fixed iron core, 7... Plunger spring, 8... Plunger, 9... Plunger pipe, 12... Stop nut, 13... Valve spring,
14...Pilot valve, 15...Spring holder, 17
... Spring, 18 ... Guide hole, 19 ... Ball valve, 20 ...
... push button, 21 ... guide, 22 ... spindle, 23 ... spring, 24 ... valve body, 25 ... piston valve body, 26a ... exhaust hole.

Claims (1)

[Scope of utility model registration request] An electromagnetic device part B having an electromagnetic coil 5 and a plunger 8 with a pilot valve 14, a valve body 24 having a valve element 25 for opening and closing a fluid flow path, and a valve body 24 that is fixed to the two in the middle and communicates with the exhaust hole 26a. It consists of a manual opening mechanism A of a cylindrical body having a pilot hole 22c.
A pressure equalizing hole 25a that communicates with the back chamber of No. 5 is provided, and a guide hole 25b having a larger diameter than the pressure equalizing hole 25a is provided in the manual opening mechanism A to enable communication of the back chamber from the electromagnetic device section B to the pilot hole 22c, Center holes 22a and 22b are provided in the cylindrical body, respectively, and a guide hole 18 having a larger diameter than the pressure equalizing hole 25a that communicates between the center hole 22b and the back chamber is provided, and the center hole 22b and the pilot hole 22
A ball valve 19 is provided with a valve seat 22d that communicates with c, and is always biased by a spring 17 to close the valve seat 22d.
The ball valve 19 is installed in the center hole 22a and the valve seat 22
A solenoid valve with a manual opening mechanism is provided with a spindle 22 with a push button that opens from d and a spring 23 that returns the spindle 22 to its original position.