JPS5911248Y2 - Solenoid operated pressure reducing valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetically operated pressure reducing valve that controls the pressure reduction of a working fluid in accordance with the supply current of an electromagnetic device.

Conventionally, this type of electromagnetically operated pressure reducing valve has been constructed such that, as illustrated in FIG. The aperture member 2
4 and the nozzle member 26 is branched with a side passage 25 connecting to the pressure reduction control side, and the valve element 2 consisting of a flapper is activated by the action force of the electromagnetic device 28 generated in accordance with the supplied current.
7 to change the opening of the nozzle member 26 and regulate the amount of working fluid discharged to the low pressure side after passing through the throttle member 24, thereby controlling the pressure of the working fluid flowing into the side passage 25. There is.

However, this type of valve must be made small so that it can be installed close to a fluid actuator device, etc.
Since the throttle member and the nozzle member are arranged in a straight line, the valve body is directly affected by the jet force of the working fluid jetted from the throttle member and causes oscillation, so the axial dimension between the throttle member and the nozzle member is It had the disadvantage that it had to be long and could not be installed in a small size.

The present invention was developed in view of these drawbacks, and its technical objective is to reduce the influence of the jet force of the working fluid as much as possible in the flow path from the throttle to the valve body, and to shorten the shaft dimension.

Therefore, in the present invention, a cylindrical hollow member passing through the valve hole is provided with a throttle hole that penetrates the valve hole from the outer surface of the cylindrical shape, and the hollow member is fitted into the fitting hole of the valve body. In this way, the opening of the throttle hole on the cylindrical outer surface is connected to the fluid supply side, the opening at one end of the valve hole is connected to the pressure reduction control side, and the opening at the other end is connected to the low pressure side, thereby forming a hollow member that opens to the low pressure side. A valve body is provided so as to be able to be attached to and removed from a valve seat formed in the valve hole opening of the valve hole, and an electromagnetic device is provided to apply an acting force in the seating direction to the valve body, and the valve body is actuated from the fluid supply side. Since the fluid is jetted from the throttle hole to the valve hole so as to collide with the inner surface of the valve hole, the influence of the jet force of the working fluid on the valve body is reduced, and the shaft dimension can be shortened.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, 1 is a valve body, which has a supply port 2 connected to the fluid supply side, a control port 3 connected to the pressure reduction control side, and a discharge port 4 connected to the low pressure side, and communicates with the control port. A cylindrical hollow member 7 extending through the valve hole 5 is press-fitted into the fitting hole 6.

The hollow member 7 is provided with a throttle hole 9 that penetrates the valve hole 5 from the cylindrical outer surface substantially perpendicularly, and a valve seat 8 is formed at the opening of the valve hole 5 on the protruding end surface that protrudes from the side surface of the valve body 1. The control port 2 is connected to the opening of the throttle hole 9 on the cylindrical outer surface of the hollow member 7 .

10 is an electromagnetic device, and a coil 12 is placed inside an electromagnetic cover 11.
, fixed cores 13A, 13B, and the main members of the movable core 14, and acts on the movable core 14 in proportion to the currents E1, E2, etc. supplied to the coil 12 as shown in FIG. It is designed so that the characteristics of

The electromagnetic device 10 is fixed to the side surface of the valve body 1 by fitting the protrusion of the hollow member 7 into the fitting hole 15 provided in the fixed iron core 13A to center the valve hole 5 and the movable iron core 14. There is.

The movable core 14 is integrally provided with an operation rod 16 made of a non-magnetic material and protrudes from one end surface, and bearings 1 are attached to the fixed cores 13A and 13B.
It is movably supported via 7A and 17B, and forms a gap G for obtaining an acting force between the end faces facing the fixed core 13A.

Reference numeral 18 denotes a valve body, which is provided with a valve face 19 formed in a conical shape so that it can be freely attached to and removed from the valve seat 8 to open and close the valve hole 5, and is moved to the fitting hole 15 of the fixed iron core 13A communicating with the discharge port 3. It can be stored freely and fitted onto the operating rod 16.

Reference numeral 20 denotes an adjustment washer, which is interposed between the operating rod 16 and the valve body 18 and is used to adjust the movable iron core 1 when the valve body 18 is seated on the valve seat 8.
4 is for regulating the operating position where it is attracted to the fixed iron core 13A side.

21 is a coil 12 fixed core 13 inside the electromagnetic force bar 11
A, 13 is a lid member made of non-magnetic material that fixes the main members such as B, and 22 is a lead wire for supplying current to the coil 12.

Next, the operation will be explained.

FIG. 1 shows a state in which the current to the coil 12 is cut off, the valve body 18 is positioned at the maximum operating end, the valve hole 5 is fully opened, and the working fluid on the fluid supply side is introduced into the supply port 2. is restricted by the throttle hole 9, flows into the valve hole 5, and is discharged from the discharge port 4 to the low pressure side.

When a current is supplied to the coil 12, a force corresponding to the supplied current acts between the movable core 14 and the fixed core 13A due to the magnetic force lines flowing through the gap G, causing the movable core 14 to move to the left, seating the valve body 18 on the valve seat 8, and reducing the pressure. Increase the pressure of the working fluid on the control side.

The valve body 18 changes the opening of the valve hole 5 of the valve seat 8 due to the balance between the acting force of the electromagnetic device 10 and the acting force of the working fluid on the pressure reduction control side, and the valve body 18 changes the opening of the valve hole 5 of the valve seat 8 to the control port 3 according to the supplied current of the electromagnetic device 10. Controls the pressure of the flowing working fluid.

At this time, the working fluid on the fluid supply side flows from the throttle hole 9 to the valve hole 6.
Since the jet flows into the valve hole 5 as if colliding with the inner surface, the valve body 1
8 is less susceptible to the influence of the jet force of the working fluid and oscillation is prevented. Therefore, by shortening the axial dimension between the valve seat 8 and the throttle hole 9, stable pressure reduction control of the working fluid can be obtained.

In this way, the present invention provides a cylindrical hollow member that penetrates the valve hole with a throttle hole that penetrates the valve hole from the outer surface of the cylindrical shape, and the hollow member is fitted into the fitting hole of the valve body. By doing so, the opening on the cylindrical outer surface of the throttle hole is connected to the fluid supply side, the opening at one end of the valve hole is connected to the pressure reduction control side, and the opening at the other end is connected to the low pressure side.
By providing a valve body that can be attached to and detached from a valve seat formed in a valve hole opening of a hollow member that opens to the low pressure side, and by providing an electromagnetic device to apply an acting force to the valve body in the seating direction. The working fluid is jetted from the throttle hole to the valve hole as if colliding with the inner surface of the valve hole, and the valve body is not directly affected by the jet force.The axial dimension between the throttle hole and the valve seat can be extremely short, making it possible to create a small valve. It has features such as being easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an electromagnetically operated pressure reducing valve showing an embodiment of the present invention, FIG. 2 is a diagram showing the characteristics of the electromagnetic device, and FIG. 3 is a simplified diagram of a conventional example. 1... Valve body, 5... Valve hole, 6... Fitting hole, 7...
... Hollow member, 8... Valve seat, 9... Perforated hole, 10.
...Electromagnetic device, 18...valve body.

Claims (1)

[Scope of utility model registration request] A cylindrical hollow member passing through the valve hole is provided with a throttle hole that penetrates from the outer surface of the cylindrical shape substantially orthogonally to the valve hole, and by fitting the hollow member into the fitting hole of the valve body, the cylinder of the throttle hole is The opening to the outer surface of the hollow member is connected to the fluid supply side, the opening at one end of the valve hole is connected to the pressure reduction control side, and the opening at the other end is connected to the low pressure side. An electromagnetically operated pressure reducing valve is provided with a valve body that can be freely attached to and removed from a seated valve seat, and an electromagnetic device that applies an acting force in the seating direction to the valve body.