JPH02212687A - Switching device for fluid valve - Google Patents

Abstract

PURPOSE:To enable the increase of the switching speed of a valve body by the use of a hydraulic cylinder having high thrust by a method wherein a lock rod is movable to a fluid valve body in a direction extending at right angles with an axis, and through engagement of the lock rod with the stopper of a valve operating rod in an operation position, movement in an axial direction is regulated. CONSTITUTION:When a pneumatic cylinder 15 is expanded, after a drive plate 16 and coupling rods 17 and 18 are moved in a direction M1, the right end of a compression spring 19 is pressed against a control plate 23, and thrust in a direction M1 is exerted on the plate 23. In which case, since a lock rod 13 is brought into contact with a surface 11a of a stopper, axial movement of a control rod 3 is regulated and the control rod is not moved. When the cylinder 15 is further expanded, a cam member 21 is pressed by a stop ring 32 to enter between lock rods 13 and 13 to separate the lock rods away from each other, resulting in release of engagement between the lock rod 13 and the stopper 11. At a moment when engagement is released, the plate 23 and the control rod 3 are moved in a direction M1 through thrust of the spring 19 to switch a fluid valve 2, and the stopper 11 is protruded rightwardly of the lock rod 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fluid valve switching device, and is used, for example, to quickly switch a fluid valve that requires a large operating force for switching.

[Conventional technology and its problems]

Fluid valves for switching the flow paths of high-viscosity fluids such as paint or various pressurized fluids require a large operating force to move the valve body, so a large solenoid is used as the operating drive source. In addition to increasing the size of the fluid valve, there was a risk of malfunction or solenoid burnout due to insufficient thrust from the solenoid or pilot pressure.

In addition, when a fluid pressure cylinder such as a pneumatic cylinder is used as the operating drive source, it is possible to easily obtain a large thrust, but the operating speed of the fluid pressure cylinder (the movement speed of the piston rond) is not fast. However, there was a problem that the valve body did not switch at high speed.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a fluid valve switching device that can use a fluid pressure cylinder with a large thrust as an operation drive source and can switch a valve body at high speed. .

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a fluid valve switching device configured such that a flow path is switched by reciprocating linear movement of a valve operating frame, the device being provided at one end of the valve operating frame. a stopper that is movable in an axial direction and a right angle direction with respect to the main body of the fluid valve, and an operating position that engages with the stopper to restrict axial movement of the valve operation frame; A locking rod that can take a non-operating position where it does not engage, an elastic member that urges the locking rod toward an operating position, and a reciprocating linear drive source that moves linearly and connects the valve operating frame via a spring member. A drive operating member that provides a thrust in the axial direction and a reciprocating linear drive source move linearly, and when the thrust by the drive operating member reaches a certain level or more, it comes into contact with the locking rod to deactivate the locking rod. and a cam member for moving the device to the desired position.

[For production]

The locking rod is movable in a direction perpendicular to the axial direction with respect to the main body of the fluid valve, and in its operating position engages with a stopper provided on the valve operating frame to restrict movement in the axial direction.

When the drive operation member is moved by the reciprocating linear drive source,
A thrust force is applied to the valve operation frame by a spring member provided on the drive operation member.

When this thrust reaches a certain level, the cam member, which is also moved by the reciprocating linear drive source, comes into contact with the locking rod and moves the locking rod to the non-operating position.

This releases the engagement between the locking rod and the stopper.
The valve operating frame is moved in the axial direction by the thrust of the spring member, and the fluid valve is switched.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a switching device 1 according to the present invention, FIG. 2 is a sectional view taken along line H-n in FIG. 1, and FIG. 3 is a -
■It is a sectional view taken along the line.

The switching device 1 is inserted into a flange-shaped stopper 11 provided at one end of the valve operation frame 3 of the fluid valve 2, an elongated hole 12.12 provided in the main body 4 of the fluid valve 2, and is inserted in an axial direction with respect to the main body 4. locking rods 13, 13 that are movable in a direction perpendicular to the locking rods 13, 13, a tension spring 1.4.1.4 that is installed between these locking rods 13, 13 and urges them to draw each other, and a pneumatic cylinder. 15, Piston Rondo 1 of pneumatic cylinder 15
．． A driving plate 16 is connected to the tip of the connecting rod 1.5a, and a connecting rod 1.5a is connected to the driving plate 16 at one end.
1.17.1.8, 18, compression springs 19.19.20, 20 attached to the connecting rod 17, conical cam member 21. attached to the connecting rod 18. ．． 2+, 2222, and an operating plate 23 which is connected to the valve operating frame 3 and through which each connecting rod 17° 8 is movable in the axial direction. Note that 3N is a stop plate and 32 is a stop ring.

The main body of the pneumatic cylinder 15 is fixedly provided to the main body 4 of the valve operation frame 3.

Since the locking rods 13 are attracted to each other by the tension spring 14, they are normally at the operating position Psi (fourth
(see figure (C)), the cam member 21 or the cam member 2
2 enters between these locking rods 1313, the locking rods 13 move away from each other against the tension spring 14, and reach the non-operating position P where they do not engage with the stopper 11.
Move to S2 (see FIG. 4(a)).

The drive plate 16, the connecting rod 17, the compression spring 1920, and the stop plate 31 constitute a drive operation member 4142.

Next, the operation of the switching device W1 configured as described above will be explained with reference to FIGS. 4(a) to 4(f).

When the pneumatic cylinder 15 expands, the drive plate 16 and the connecting rod 17j8 connected thereto move to the right in FIG. , whereby the operation plate 23 receives a thrust in the direction of arrow M1. However, at this stage, the locking rod 13 is attached to one surface 11. of the stopper 11. a (state shown in Figure 4(f))
Therefore, the valve operating rod 3 is restricted from moving in the axial direction and does not move.

When the pneumatic cylinder 15 further expands, the cam member 21
is pushed by the retaining ring 32 and the two retaining rods], 3
．． 13, the locking rods 1313 are separated from each other, and the engagement between the locking rods 13 and the stopper 11 is released (fourth
state shown in Figure (a)).

At the moment when the engagement between the locking rod 13 and the stopper 11 is released, the operating plate 1-23 and the valve operating rod 3 are moved in the direction of the arrow M1 by the thrust of the compressor 219, thereby switching the fluid valve 2. . At this time, the stopper 11
protrudes to the right of the locking rod 13 (the state shown in FIG. 4(b)).

Next, when the pneumatic cylinder 15 contracts, the cam member 21
is separated from the locking rod 13, and the locking rod 13 is released from the tension spring 14.
The other surface 1.1 of the stopper 11 is attracted by
b (state shown in FIG. 4(c)).

As the pneumatic cylinder 15 contracts, the operation plate 23 eventually receives a thrust in the direction of arrow M2 by the compression spring 20. In this case as well, the locking rod 13 is attached to one surface 11 of the stopper 11, as described above. Since it is in contact with b,
The movement of the valve operating shaft 3 in the axial direction is thereby restricted and does not move.

When the pneumatic cylinder 15 further contracts, the cam member 22
is pushed by the retaining ring 32 and the two retaining rods 1.3
．． 13, the locking rods 13°I3 are separated from each other, and the engagement between the locking rods 13 and the stopper 11 is released (the state shown in FIG. 4(d)).

At the moment when the engagement between the locking rod 13 and the stopper 1 is released, the operating plate 1-23 and the valve operating rod 3 are moved in the direction of arrow M2 by the thrust of the compression spring 20, thereby switching the fluid valve 2. . At this time, the stopper 11
protrudes to the left of the locking rod 13 (the state shown in FIG. 4(e)).

According to the embodiment described above, since the valve operating rod 3 is switched by the pneumatic cylinder 15, switching can be performed reliably using a large thrust, and no switching or malfunction of the fluid valve 2 will occur.

In addition, the pneumatic cylinder 15 compresses the spring 19°20
is pressed against the operation plate 23, and a detent mechanism is provided that releases the engagement between the stopper 11 and the locking rod 13 when the 716 force reaches a certain level.
Even if the speed of the pneumatic cylinder 15 is not fast, the valve operating rod 3
moves at high speed and the fluid valve 2 is switched at high speed.

According to the embodiment described above, since the cam member 21 is movable in the axial direction within a certain range of the connecting rod 18, interference between the cam member 21 and the operation plate 23 is prevented.

In the above embodiment, the tension spring 14 may be replaced with rubber or the like. The valve operating rod 3 of the fluid valve 2 may be integrated with the valve body or separate from the valve body, and the fluid valve 2 may include various fluid valves such as a stop valve, a 3-way valve, or a 4-way valve. Can be used. Pneumatic cylinder 15
A hydraulic cylinder may be used instead. In addition, the shape of each part,
Various dimensions, structures, materials, etc. other than those described above can be used.

〔Effect of the invention〕

According to the present invention, a fluid pressure cylinder with a large thrust can be used as the operation drive source, and the valve body can be switched at high speed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a switching device 1 according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
(2) A sectional view taken along the line, and FIGS. 4(a) to 4(f) are side views for explaining the state of engagement between the stopper and the locking rod. DESCRIPTION OF SYMBOLS 1...Switching device, 2...Fluid valve, 3...Valve operating rod, 4...Main body, 11...Stopper, 13...
Locking rod, 14...Tension spring (elastic member), 15.
・・Pneumatic cylinder (reciprocating linear drive source), 17.18・
...Connecting rod, 19... Compression spring (spring member L21..
22... cam member, 41. ．． 42... Drive operation member, PSl... operating position, PS2... non-operating position.

Claims (1)

[Claims] (1) A switching device for a fluid valve configured to switch a flow path by reciprocating linear movement of a valve operating rod, comprising: a stopper provided at one end of the valve operating rod; and a main body of the fluid valve. The valve operating rod is provided so as to be movable in an axial direction and a right angle direction, and has an operating position in which it engages with the stopper and restricts the axial movement of the valve operating rod, and a non-operating position in which it does not engage with the stopper. a locking rod to be obtained; an elastic member that urges the locking rod toward an operating position; and a driving operation that is linearly moved by a reciprocating linear drive source and applies an axial thrust to the valve operating rod via a spring member. a cam member that is linearly moved by the reciprocating linear drive source and that abuts the locking rod to move the abutment locking rod to a non-operating position when the thrust by the drive operation member reaches a certain level or more; A fluid valve switching device comprising: