DE1550064A1 - Arrangement for quick maneuvering valves - Google Patents

Description

Patent attorneys

DIPL-ING. R. OHMSTEDE DIPL.-ING. B. SCHMID

Stuttgart, Falbenhennenstr. 17th

A / S Westad Armaturfabrik, 1550064

Geithus, Norway.

Arrangement for quick maneuvering valves.

The present invention relates to quick maneuvering valves, namely quick release valves the type where the valve closure member is in the open or closed position under spring load and in the said position is kept locked with the help of a steered, over-centered system that counteracts the spring pressure.

Snow shut-off valves and quick-release valves are used in various fields within industry and in particular on board ships, e.g. inserted into fuel lines for the purpose of closing and opening in disaster situations, and otherwise in cases where the rapid opening or closing of gas or liquid lines is important. Valves provided with compression springs, a closure arrangement and a trigger arrangement are known for this purpose. The triggering arrangement can be remotely controlled from a central command station. The valve types mentioned are usually set up in such a way that the valve closure element (hereinafter referred to as the closure part) is in the normal position with the aid of locking pegs and locking hooks

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is kept locked by an operating arm or lever assemblies that correspond to corresponding assemblies on Valve housing are engaged. For this purpose, two arms or the like must be used, namely the actual one Lever that is connected to the locking part, as well as the locking arm or locking hook. The latter can optionally operated by a lever. For example, if it is a quick release valve, this becomes operative with the help of the said actuating arms Normal position (open) offset. If the latter valve is closed after the release mechanism has been triggered, the levers are marked in different from the starting position Position, and you can visually determine whether the valve is open or closed, as well as the carry out any necessary actions. An even more complicated type of valve is characterized in that the closure part is connected by a screw with a steering wheel or the like and by turning the steering wheel up is moved (opened). Closing the valve in This open position now takes place in that a locking hook located on the lever with one on the valve shaft located locking pin is brought into engagement. So that the valve should be able to do so after it has been triggered To quickly return to the closed position of the spring pressure, the steering wheel and the screw have to be returned to Bottom position can be rotated down, so that the locking part is only held up by the releasable locking single handle will. The better known? Locking devices are pretty

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complicated, partly because two actuating arms are provided, and the number of mechanical joints and axes of rotation becomes relatively large. The danger of reddening and painting u "Ä. is also present to an unnecessarily large extent.

The purpose of the present invention is to provide an alternative and improved type of quick release and quick opening valves.

According to the invention, the improvement consists first of all, in that an outer lever is in a controlled connection with the valve closure member (the closure part) and in Normal position kept locked in over-centered position which lever with the help of a hydraulic, pneumatic, electrical or mechanical release device can be brought out of the over-centered position, so that the said spring pressure a closing or Causes opening of the valve.

Another feature of the invention - the quick release valves concerns - consists in the fact that the valve closure element is axially resilient in relation to the valve spindle (valve

Shank) is arranged.

The mentioned triggering device can expediently from a »central command can be remotely controlled, especially where several valves work together within an industrial unit .

The triggering device can in particular be on the Valve housing-mounted standard hydraulic cylinder where the piston of the cylinder directly triggers the lever, or the Piston can affect a knee joint assembly that affects the

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Lever past the over-centered position.

The used in the valve, over-centered closure system is well known as the principle and consists of a one-armed lever (pivot point b), which is influenced by a force (spring force), the point of attack (a) is located at any point of the one-armed lever.

In practice, the lever is rotatable on a fixed Punlfct attached to the valve housing (b), and the spring-loaded The valve spindle is dependent on the movement of the lever and thus on the movement of the point attached to the lever (a) raised and lowered. Problems arise now - if there is quick opening valves - with the achievement of a sufficiently tight seal, the valve cone (valve head) against, the seat of the valve body, what difficulties due to the over-centered locking system are. .......

The attached drawings and the following description of the drawings explain some embodiments according to the invention, the inventive features of the valves, including the over-centered lever or locking arm, can be found in this connection in all examples,

Fig. 1 shows a quick opening valve according to the invention seen from the side and partly in section.

Fig. 2 shows the upper part of a quick release valve and .

FIG. 3 shows an alternative embodiment of the one in FIG. 2 illustrated valve.,. ;

In the quick release valve in Fig. 2 is the Closure part 7 in the raised (open) position above the. Valve seat 8 and is under constant spring load on the part of the compression spring 6. This pressure is transplanted through the valve rod 5 and to the bracket 4, which by a link mechanism c-a-b is connected to the operating arm 1. As can be easily understood from the figure, the Spring force pulls point c and thus point a down, and because of the angle a between the rotation axes c-a-b and d en the resulting torque is forced down the lever 1 until it hits a support point, in this Fall on top of the valve body.

In Fig. 3 (quick release valve) an alternative « to the system shown in Fig. 2, where the hydraulic cylinder 2 is attached above and the piston 3 through a Knee joint 10 is in articulated connection with the valve rod 5. When the piston 3 is moved downwards, the knee joint moves against the contact surface 11 belonging to the lever 1 pressed on the outside (the contact point lies, as can be seen, above the axis of rotation of the lever), and the system becomes the valve after the lever has passed the equilibrium position close, (not shown).

The above mentioned with the achievement of sealing pressure Problems associated with quick release valves are am best explained with reference to the drawings, in particular Fig.l. .

With the valve in the open position, lever 1, as shown in the figure by dot-dash lines, upright

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stand, and the valve spindle will stand in the uppermost position (dash-dotted line in the figure). When the valve is to be closed, the lever must be turned over (b) in the with be rotated downward in the direction shown by the arrow. Movement of the spindle down to the closed position becomes controlled in a straight line and corresponds to the circular movement of point (a). If the three points b-a-c are on the same line lie, the system is in unstable equilibrium, in which point (a) has reached its lowest position and consequently also has driven the spindle and valve head to the lowest position. Un meanwhile to reach the "over-centered" position, where the system of the compression springs 12, if necessary 12 + 6 resulting spring pressure closed point (a) must move a certain distance past the straight line b-a-c before the lever against the piston rod 3 in the hydraulic cylinder 2 anatase t. This causes point (a) to move slightly upwards from the lowest position and the spindle to follow, so that there is no longer a seal against the valve seat 8 of the valve housing, but a small opening which caused a leak through the valve.

found that

According to the invention, an effective seal can only be created in that the valve cone 7 is axially resilient to the Valve spindle 5 is attached. In the exemplary embodiment in the drawing, this suspension is brought about by the spindle 5 being under pressure from disk springs 12 installed in the bottom of the hollow valve cone. In other respects this suspension can

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can of course be achieved by using other types of springs. Die.Spindel thus has a certain axial clearance in the bore in the example shown, corresponding to the over-centering. l) the sealing pressure is provided by the spring 12 according to the invention. A lock nut 13 ensures ^ '/ "' ■ 'the spindle the valve plug is moved to above, when the piston 3 to the arm 1 through the''''shifts the center position and the spring 6 triggers.

There can be other types of 'lever-maneuvered Valves with an over-centered mechanism! Think that within fall within the scope of the invention if the spindle is resilient in the ' Relationship "is attached to the closure organ.

BATHROOM OHIQlNAL. 909851/0993

Claims (1)

Patent claims: 1. Quick maneuvering valve, namely quick opening resp. Quick release valve "of the type where the valve closure member is in the open or closed position under spring load stands and is kept locked in the said position with the help of a steered, over-centered system that the Counteracts spring pressure, characterized in that an outer lever (1), which with the valve closure member (7) in steered connection (a-b-c) is held locked in the normal position in over-centered position, which lever with the help of a hydraulic, pneumatic, electrical or mechanical release device (2,3) from the over-centered Position can be brought out, so that the said spring pressure closes or opens the valve causes. · 2. Valve according to claim 1, characterized in that the valve closure member (7) is axially resilient in relation to the Valve spindle (5) is attached. 3. Valve according to claim 2, characterized in that said axial suspension is brought about in that the Valve spindle rests against a compression spring in the bottom of a recess in the valve closure member. 4 · Valve according to claims 1 - 3> characterized in that the hydraulic, pneumatic, electrical or mechanical Triggering device is remotely controlled from a central command. ^ .- 8 - 909851/0993 bath 5 · Valve according to claims 1-4 »characterized in that the release device is a} -Standard hydraulic cylinder is. 6. Valve according to claims 1-5 »characterized in that the triggering device consists of a knee joint (10) which is between the valve closure member and a hydraulic piston is connected, which knee joint on command, pushes the lever past the over-centered position. - 9 - BATH 9-09851 / 0993