DE911580C - Peristaltic pump - Google Patents

Description

CWlGBl. P. 175)

ISSUED MAY 17, 1954

S 21244 Ia / 3p e

Hose pump

is used

The invention relates to a tube pump in which a mounted in a housing elastic circular arc-shaped tube piece of about 90 ⁰ bend angle progressively by rollers which are rotatably mounted in a rotor, is compressed.

In such peristaltic pumps, which have the advantage that the pumped liquid is not with the Rotor, its storage, etc. can come into contact, it has so far not been possible to make a pump more substantial Establish delivery capacity and pressure head while reducing wear of the highly stressed hose section to a minimum. It has become the case with pumps of this type shown that the liquid in the hose before each roll forming a localized, self temporarily not immediately compensating excess pressure accumulates, which the risk of inflation or a Breakage of the hose. It is therefore necessary for an immediate pressure equalization can take place to avoid any sharp change in direction in the hose piece. the end For this reason, the invention provides that the circular arc-shaped part of the hose piece its two ends tangential rectilinear extensions, which in corresponding rectilinear Pipe socket of the housing are embedded.

Further features of the invention can be seen from the following description of the drawing, in which the embodiment of a hose pump according to the invention in schematic Shape is shown.

Fig. I shows the cross section of a hose pump;

Figs. 2 to 7 show different cross-sections designs of the hose section. In the housing ι a hose pump is in The three-armed rotor 3 driven in the direction of the arrow 2 is mounted, the arms 4 of which carry the rollers 5. Furthermore, an elastic, z. B. made of rubber and circular arc-shaped Hose section 6 stored, which is progressively compressed by the rollers 5 of the rotor 3 in this way is that the liquid is conveyed in the direction of arrow 7. The arc-shaped one Part 8 of the hose piece 6 has tangential straight extensions 9 at both ends, which are embedded in corresponding straight pipe socket 10 of the housing 1. At the ends these rectilinear extensions 9 are those made with the hose piece 6 in one piece Flanges, which have their place in a corresponding recess 12 of the housing and in this way hold the piece of hose 6 firmly and advantageously at the same time as a seal can serve for the connection tube 13 (see. Fig. 2). Thanks to the secure embedding of the straight Extensions 9 of the hose section 6 in the housing 1 and the gradual, tangential transition from the arc of a circle in the rectilinear piece of tubing is the risk of bloating of the hose section 6 completely avoided.

In order to avoid that the hose piece 6 could assume the cross-sectional shape shown in Fig. 3, having leaks 14, was its wall in a manner according to the invention at the bending points compressed by the roller carried out diluted (see. Fig. 4 and 5). These dilutions can either be external Recesses 15 or be designed as inner recesses 16.

The between the terminals 17 of the curved Hose piece part 8 located and this opposite part of the housing inner wall carries a circular arc-shaped, elastic lining 18, the inner radius of which corresponds to the inner radius coincides with the compressed hose section wall on which the rollers 5 travel. on In this way it is prevented that the rollers 5 when leaving the hose section 6 with great Continue turning speed empty on its axis 19 and when they hit the piece of hose again, they experience intermittent braking that is associated with strong friction.

Furthermore, it is useful to provide the hose piece with parts 20 which ^{are embedded between the facing edges of the joined housing halves i a} , i ^& and effectively prevent the hose piece 6 from rubbing on the housing wall or lifting off. The invention provides that these parts 20, in contrast to the already known execution of a coherent comb, are designed as individual projections ^{20 a} , 20 ⁶ , 20 ^c , as shown in FIG. This has the advantage that the comb 20 is not subject to any tensile stress when the tube section is bent, in contrast to the contiguous design.

Claims (5)

Patent claims: i. Hose pump with a mounted in a housing arcuate length of tubing of approximately 90 ⁰ bend angle and a the tube piece progressively through a plurality of rotatably fastened to it rolls compressing rotor, characterized in that the arcuate part (8) tangential of the hose piece (6) at its two ends has straight extensions (9) which are embedded in corresponding straight pipe socket (10) of the housing (1). 2. Peristaltic pump according to claim 1, characterized in that the hose piece (6) on the ends of its straight extensions have a flange-like or collar-like collar (11), which holds the hose piece (6) and in a corresponding recess (12) of the straight pipe socket (10) can be embedded. 3. Peristaltic pump according to claim 1 or 2, characterized in that the wall of the Hose section (6) is thinned at the bends (14, 15). 4. Peristaltic pump according to claims 1 to 3, characterized in that the between the end points (17) of the bent hose piece part (8) part of the interior of the housing located opposite and opposite this with an arcuate, elastic lining (18) is provided, the inner half mesiser with the inner radius of the rollers (5) The compressed hose section wall that is driven corresponds to. 5. Peristaltic pump according to claims 1 to 4, characterized in that the hose piece (6) is provided in the plane of its longitudinal section with protrusions (20 ", 20 ⁶ , ^{20 e} ) which, for example, between the mutually facing edges of the assembled housing halves (i °, i ⁶ ) are embedded. Cited publications: German Patent No. ¹ J ¹ J 308; French Patent No. 772 546; British Patent No. 588 154. 1 sheet of drawings © 9502 5.54