JPS598712B2 - valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device for a hydraulic circuit, and more particularly to a valve device for a hydraulic winding machine.

In previously known solutions with remotely controlled actuating valves, it was necessary to apply an extra, and therefore wasteful, actuating force to the handle in order to manually actuate the actuating valve.

This is because each part of the remote control mechanism must be pulled by those forces.

The main object of the present invention is to provide a remotely controlled valve as follows.

That is, the slide of the actuating valve can be actuated by a particularly simple and reliable device, which does not act as an obstruction or requires a special force on the device to manually actuate the slide. There is no need to add remote control equipment to the hazards.

According to the present invention, an operating valve having a slide for switching a hydraulic circuit, a connecting body that drives the slide, a manual handle that drives this connecting body, and a remote control device that operates the connecting body is controlled by a remote control device. A remotely controllable valve arrangement for a hydraulic circuit, comprising: a control element for a hydraulic circuit, wherein the coupling body is actuatable by the manual handle or by the remote control device via the control element; The element has two movable bodies that can be moved independently between an activated position close to each other and an inactive state separated by a pressure medium supplied and discharged from the remote control device, each of the movable bodies having A spring is attached to move the movable bodies apart from each other in the direction of the inoperative state, and the coupling body has an engaging body that engages each of the movable bodies in the actuated state to couple the control element and the slide.

The solution according to the invention allows for arbitrary actuation of the slide of the actuating valve by manual control, independent of the control element, since the coupling body and the moving body are automatically disengaged when the control element is inactive. can do.

On the other hand, by remotely controlling the slide of the operating valve,
A manual control handle is adapted to follow the control movement of the slide.

Hereinafter, preferred embodiments of the present invention will be described by way of example with reference to the accompanying drawings.

FIG. 1 shows a water pressure drive circuit 10a and a water pressure control circuit 1.
0b is illustrated.

This hydraulic drive circuit 10a may be of a type corresponding to that shown in Norwegian Patent No. 86819, for example.

This drive circuit includes a water pressure pump 11 and a back pressure valve 13.
It has a discharge pipe 12 with a .

The pump is driven by an electric motor 11a or the like.

One side of the pump is connected to a return pipe 14 from the operating valve 15, and the other side is connected to a feed pipe 16 leading to the operating valve.

A back pressure valve 11 is inserted into the pipe 16 .

From the pipe 16, branch pipes 18, 19 pass through a back pressure valve 20 and a re-engaging valve 21 to an operating valve.

Passages 23, 24, 25 and 26 extend between the actuating valve 15 and the hydraulic hoist motor 22 driven thereby, and a slide 27 controls the hoist motor in different directions at different speeds and with different driving forces. gives the possibility to operate.

This becomes clearer from the above patent specifications.

The drive circuit 10a described above is shown purely for illustrative purposes and may be modified in various ways to accommodate various applications.

The slide 27 is connected in the exemplary embodiment to a working handle 28, the manner of which is well known and is shown for example in Norwegian Patent No. 113471, with a stationary pivot 29 and an associated connecting arm 30 31.

In the illustrated central position of the handle 28 shown in FIG. 1, the actuating valve slide 27 is correspondingly in a neutral position and the motor 22 is in a rest position.

By moving the handle to the right (clockwise) as shown by arrow A, the motor is driven in one direction of rotation, and by moving the handle to the left (counterclockwise) as shown by arrow B The motor is driven in the opposite direction of rotation.

By moving the handle, the driving direction of the motor is controlled, and the driving speed of the motor is adjusted as necessary in each driving direction.

The water pressure control circuit 10b has a water pressure pump 30a and a discharge pipe 31a with a back pressure valve 32.

This pump is driven by an electric motor 33 or the like.

The suction side of the pump is connected to the expansion tank 34 via a tube 35 with an associated filter 36, and the discharge side of the pump is
It is connected to a remote control valve 37 via a pipe 38.

A return pipe 39 from valve 37 leads to expansion tank 34 via filter 40 .

The control valve 37 has two separate valves 37a and 37b, which are connected to respective control pressure pipes 41 and 4.
2 to movable bodies 43a and 43b, which are part of a control element 43 provided in the operating valve 15.

The return line 44 of the control device 43 leads to the expansion tank 34 via a line 39 with a filter 40.

The remote control valve 37 is designed in a manner known per se, as shown in detail in FIG.

The valve 37 has a valve housing 45 and includes two relief valves 3γ.
a and 37b are formed inside it.

These relief valves 37a, 37b have corresponding configurations.

As is clear from FIG. 2, each valve 37a and 37b'
have respective valve stems 46, 47 which are secured to and project from a handle 49 which is pivotally mounted about a pivot pin 50 on the valve housing 45. Each arm of lever 48 is actuated.

The upper surface of the valve housing 45, the lower part of the nozzle 49, the lever 48 and the pivot pin 50 are connected to a resiliently deformable cover 5.
1 in a shielded manner.

Valve stems 46 and 47 are shown in their most prominent position in FIG.

When the handle 49 is swung to the left from the center position of the handle, the valve stem 46 is actuated, and when the handle 49 is swung to the right from the center position of the handle, the valve stem 41 is actuated.

The valve stem 46 supports a cylinder 52 and a piston 53 slidably received within the cylinder has a valve slide 5.
The upper end of 4 is fixed.

This piston 53 is moved into the cylinder 5 by a compression spring 55.
2, this compression spring is fixed with a predetermined compression force between the spring receiver 56 of the cylinder 52 and the spring receiver 57 of the slide 54.

At the end of the slide, the spring receiver 59 of the slide 54
and the spring receiver 60 in the housing 45.
is inserted.

The slide has two end jaws 6L62 and two intermediate jaws 6.
3 and 64, each of which has a feed hole 65.
and controls the return hole 66 and intermediate operation hole 61.

The supply hole 65 is connected to the supply pipe 3 at a predetermined supply pressure.
8 to the pump 30a, and the return hole 66 is connected to the pump 30a through the
It is connected to the expansion tank 34 through a pipe 39, and the operating hole 61 is connected to the movable body 43a through a pipe 41.

A corresponding operating hole of the relief valve 37b is connected to another movable body 43b via a pipe 42.

When the relief valve is not operating, the operating hole is opened for return to the expansion tank via the slide 54.

When the handle 49 is moved leftward from the central position to a predetermined operating position, the relief valve 3γa is actuated, ie the valve stem 46 is pushed down in the axial direction against the force exerted by the spring 55.

This causes the piston 53 within the cylinder 52 to move and the spring 55 to be compressed.

The increased pressure on spring 55 overcomes the pressure on spring 58 (spring 58 is normally balanced to the royal force of spring 55), forcing the slide vertically downward.

This causes the pressure medium to flow from the supply hole 65 to the operating hole 67K and to act on the chamber 69 via the passage 68 and on the underside of the spring receiver 59 of the slide 54.

At the same time, the pressure medium from chamber 69 passes through connection tap 70 to pipe 4.
1 and further flows to the moving body 43a.

The pressure medium flows through the working hole 67 into the chamber 69 .
The internal pressure, together with the pressure exerted by spring 58, overcomes the pressure exerted by spring 55 and pushes the slide back to its initial position, so that the slide gradually adjusts itself to a position where operating hole 67 closes both supply hole 65 and return hole 66. Adjust to

There is now a predetermined pressure in chamber 69, which is determined by the position of handle 49.

This position of the slide is maintained until the handle is moved from this predetermined operating position.

If the handle is moved further to the left, the action is repeated as described above, the pressure in the chamber 69 increases and the moving body 43a is further acted upon.

The more the handle 49 is rotated, the greater the pressure within the chamber 69 becomes, and the stronger the operation of the movable body 43a becomes.

When the handle 49 is moved towards the initial position, the spring 55
The pressure on the spring 5 is correspondingly released and
8 and the prevailing pressure in chamber 69 push the slide back past its initial position, so that the slide moves into working hole 6.
7 and the return hole 66.

At the same time, the pressure on the moving body 43a is correspondingly discharged and the pressure medium flows from the chamber 69 through the working hole 67 and the return hole 66, corresponding to the pressure due to the spring 55 or the pressure due to the spring 58.

Therefore, the operating hole 67 is connected to the return hole 66 and the supply hole 650.
cut off from both.

Valve 37a then assumes its initial position of inactivity.

At the same time, pressure is discharged from the moving body 43a accordingly.

During the above operation of the relief valve 37a, the other relief valve 37b and the movable body 43b are correspondingly inactive.

However, when relief valve 37b operates in a manner similar to that described above for relief valve 37a, it exerts a similar effect on associated portion 43b of control element 43.

3 and 4 illustrate control element 43 controlled by valve 37 as described above.

3 and 4 show the structure of the control element 43, which includes the manual handle 28 of the operating valve 15 and the pivot 29 at one end thereof.
This pivot 29 projects outside the housing part of the control element connected to the handle 28 and is connected at its other end to a connecting arm 30 (FIG. 1) and has a region between its ends. This pivot shaft 29 is connected to a bifurcated lever arm 70a which is an engaging body.

This lever arm has two rollers 71, 72 at its outer end.
, and these rollers are located at an angular distance of about 800 from each other.

The rollers 71, 72 can be freely swung away from the movable bodies 43a and 43b along the path indicated by the dotted line 73 in FIG. The bodies 43a, 43b are held in place in the inactive position by a common compression spring 74 that extends them axially relative to each other.

By remote control using the valve 37, the moving body 43a or 4
The pressure of the pressure medium acting on 3b must first overcome the pressure of the spring 74 before the moving body is pushed axially into pressure contact with the associated roller 71 or 72.

Depending on how much pressure is exerted on the pressure medium acting on the moving body 43a, the moving body 43a pushes the roller 71 to the right, thereby causing the lever arm 7 (la) and the pivot 29 to swing by a corresponding pivot angle.

This device is adjusted so that a predetermined rotation angle of the handle 49 of the valve 37 corresponds to a corresponding rotation angle of the actuating valve handle 28.

This is achieved by adjusting the control pressure in tube 11 or tube 42 in an appropriate manner.

The movable bodies 43a and 43b can move toward and away from each other in a straight path that intersects the swing paths of the rollers 71 and 72.

The movable body is received in a common barrel 75 within the housing portion γθ, and the pivot 29, lever arm 70a and its rollers 71, 72 are accommodated in the adjacent chamber 11.

Since these mobile bodies are designed in a compatible manner, only one mobile body 43a will be described in detail here.

The movable body 43a has a compression-shaped abutting portion 79 for the spring 74.
It has a plate 18 forming a piston fixed to it.

The pressure from the pressure medium in the pipe 41 acts on one side of the piston 78, and the pressure from the pressure medium in the common barrel 75 and the adjacent chamber 77 and the pressure from the spring 74 act on the other side. act.

In order for the piston to move away from the exemplary inactive position of FIG.
and the medium pressure of the shell 75 must be exceeded.

By moving the pistons 18, 79 in the axial direction,
A laterally protruding portion 80 of the integral part of the spring contact portion 79 is
It comes into contact with the roller 71.

In order to be able to swing the lever arm 70a, the force due to the pressure inside the tube 41 is not only a counter pressure against the spring abutting portion γ9 and the plate 78, but also a counter force applied through the operating slide of the operating valve (for example, a spring force). ) must also be exceeded.

In FIG. 4, the moving body is shown in a predetermined operating position.

In the illustrated position, the roller 71 is received in the gap between the outwardly projecting portion 80 and the further corner 81.

This corner 81 prevents the lever arm 70a from erroneously swinging clockwise after following the roller 71 and assuming the illustrated predetermined position.

Reducing the pressure in the tube 41 causes the moving body 43a to be pushed back to the left in FIG. 4 and correspondingly back to the position in FIG. 3.

[Brief explanation of drawings]

1 is a schematic diagram showing the device according to the invention and the associated hydraulic circuit for remote control; FIG. 2 is a vertical section through a portion of the device of FIG. 1; and FIG. 3 is shown in the central position. A vertical sectional view of another part of the device, FIG. 4, is a vertical sectional view corresponding to FIG. 3 showing that part of the device in the activated position. 15...--operating valve, 27... slide,
28... Operating handle, 43... Control element, 43a, 43b... Moving body, 70a...
-...Double lever i, 71, 72...Roller, 74...Common compression spring.

Claims (1)

[Scope of Claims] 1. An operating valve having a slide for switching a water pressure circuit, a connecting body that drives the slide, a manual handle that drives this connecting body, and a remote control device that controls the connecting body. A remotely controllable valve arrangement for a hydraulic circuit, comprising an actuating control element, the coupling being actuatable by the manual handle or by the remote control device via the control element, respectively. The control element has movable bodies 4 3 a , 4 3 b that can be independently moved between an operating position close to each other and a non-operating position separated from each other by means of a pressure medium supplied and discharged from the remote control device, and each of these movable bodies 4 3 a and 4 3 b Both moving bodies 43a are included in the moving bodies 43a and 43b.
, 43b are attached to each other in the direction of the inoperative state, and the connecting body engages with each of the movable bodies 43a, 43b in the activated state to connect the control element and the slide 27. Combined 70a, 71, 7
A valve device comprising: 2. 2 The engaging body consists of a bifurcated lever arm 70a having engaging portions 71 and 72, and the movable bodies 4 3 a and 4
3. The valve device according to claim 1, wherein the valve device 3b has jaw-shaped support portions 80, 81 that engage with the engaging portions 71, 72. 3. The valve device according to claim 2, wherein the engaging portions 71 and 72 are rollers.