FI67610C - VENTIL - Google Patents

Description

The present invention relates to a valve having a plurality of hoses to be clamped by compression members, wherein the clamped hose is in compression between the valve body and inside the compression member, and in which the compression member has at least one recess guided for the hoses in compression, whereupon they open from compression.

A known valve of this type is disclosed, for example, in GB 1 340 081. Valves of this type are required for laboratory use, for example in analyzers, in which small quantities of various liquids such as samples, calibration fluids and rinsing fluids are fed and sucked from one location to another.

The object of the invention is to provide a new type of simple and reliable valve. The valve according to the invention is characterized in that the valve has a separate closing member, which is formed by a disc adjacent to the disc-shaped pressing member, which has a recess corresponding to the recess of the pressing member and which is rotatable by its own shaft. The invention provides a valve that is as simple as possible, which is technically advantageous and reliable.

Another embodiment of the invention is characterized in that a thin elastic band is attached to the body between the pressing member and the hoses. Thus, the pivoting movements of the pressing member do not wear the hoses in the compression or the hose to be compressed, because the frictional slip caused by the pivoting movements takes place between the pressing member and the strip, whereby the hoses are only affected by the compressive forces.

The invention will now be described by way of example with reference to the accompanying drawing, in which

Figure 1 shows a front view of a valve according to the invention with the cover removed.

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Figure 2 shows a section taken along the line II-II in Figure 1.

The valve has five hoses 2, 3, 4, 5, 6 which can be clamped by the clamping member 1. The clamped hoses 3, 4, 5, 6 are pressed between the valve body 7 and the clamping member 1. The compression member 1 has a recess 8 which can be guided at any hose in the compression, whereby it opens from the compression. The hose 2 is open because the recess 8 in the pressing member 1 is at it. The pressing member 1 consists of a disc rotating with its shaft 9. A stepper motor is attached to the shaft, so that the rotation of the pressing member can be easily controlled. Between the pressing member 1 and the hoses 2, 3, 4, 5, 6 there is a thin flexible metal strip 11 attached to the body 7, 10. In this case, the rotations of the pressing member do not wear the hoses 2, 3, 4, 5, 6, but are subjected only to pressing forces. .

It will be apparent to those skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below. Thus, the compression member 1 may have several recesses 8 and the hoses may be grouped side by side so that several hoses are open at the same time, etc. An optical sensor can be connected to the stepper motor or valve, whereby a detector known per se knows how the valve is controlled. The cover 12 removed from the valve has openings for hoses 2, 3, 4, 5, 6 to keep them in place.

In the case shown in Figure 1, the hose 2 is open. If it were now desired to open the hose 4, the recess 8 would have to pass the hose 3, which would then open at least momentarily. To prevent this, a closing member can be provided in the valve. Figure 2 shows a solution. The pressing member 1 is divided in the axial direction into two adjacent discs, of which the disc 13 acts as a closing member. The disc 13 has a recess 8 similar to that of the disc 1. The pressing member 1 is rotated by a shaft 9 and the closing member 13 by a tubular shaft 14. Each hose 2-6 is open only when the recess 8 of the pressing member and the corresponding recess of the closing member are at the hose. When the recesses are not aligned, all hoses are closed. Thus, the recess 8 of the clamping element 1 can pass, for example, past the hose 3 without this opening for a moment.

Claims (2)

6761 O A valve having a plurality of hoses (2,3,4,5,6) to be clamped by a clamping member (1) and wherein the clamped hose (3,4,5,6) is located between the valve body (7) and inside the clamping member pressing, and in which the pressing member (1) has at least one recess (8) which can be guided at the pressed hoses, whereby they open from the pressing, characterized in that the valve has a separate closing member (13) formed by a disc-shaped pressing member (1). ) adjacent to a disc (13) having a recess corresponding to the recess (8) of the pressing member and rotatable by its own shaft (14). Valve according to Claim 1, characterized in that a thin elastic band (11) is fastened to the body between the pressing element (1) and the hoses (2,3,4,5,6). I.