DD139741A5 - HOSE PUMP - Google Patents

Description

Berlin, 9.11.1978

54 072 23

AP P 04 B / 208 424

peristaltic pump

Aro vend- nesgebiet__aer invention

The invention relates to a peristaltic pump for conveying liquid media that must not be contaminated. You vdrd especially applied in medicine and chemistry *

Charalgistics "of the known technical solutions

It is a peristaltic pump known (DS-GM 1 984 906), in which over angularly offset eccentric pressure elements are actuated, which are arranged in the longitudinal direction of a hose next to each other and periodically eccentric wavy out of phase squeeze the hose periodically,

In this solution, the pressure elements are punches that rest with their ends facing away from the hose on eccentric cam and are moved by this against the force of Eückholfedern against the hose. The movement of the stamp in the hose releasing position is carried out in this arrangement not by the eccentric itself, but by the said Eückholfedern. This construction "unsjTametric" construction makes the pump little expandable and also requires a considerable amount of components »

9 _β 11 · .1978 54-072 23

Zlgl ^^ erJBrflndung

The aim of the invention is to reduce the complexity of components and to significantly increase the pumping power.

Explanation of the essence_s_d_er_ ^ rfindung

The object of the invention is to provide a peristaltic pump which enables the movement control of the pressure elements with few components, ensures a pulsation-poor flow of the medium to be delivered and with which several media can be conveyed at the same time.

This object is achieved in that. the pressure elements are designed as by the eccentric on the hose to and away from this motion sliding gate. According to a preferred embodiment of the invention, the eccentrics sit in openings formed in the gate slides and cooperate with the hose facing and away parts of the walls of the openings together. For example, each sliding gate as a laterally perpendicular to the tube _{s s} substantially rectangular plate -executed'-which have in their interior a substantially rectangular hole on γ; whose sides are parallel to those of the plate and which receives the eccentric. The eccentric is with respect to the sliding block in the guide direction without play and with game installed perpendicular to it, so that a perpendicular to the guide direction verli ig movement of the eccentric on the sliding block slide does not transmit,

9e 11 *. 1978 54-072 23

rm 3 · "·

According to a preferred embodiment of the invention, the eccentric adjacent sliding block are each offset by an equal angle to each other, preferably each eccentric zv / ei axially parallel bores having a predetermined position for eccentricity and adjacent eccentric are each connected by a mutually not corresponding holes passing pin «

V / egen the positive control of the sliding block slide in both directions of movement, the hose pump according to the invention without difficulty preferably ausgestalten so that the same in the movement direction of the sliding block the hose side facing away in its range of motion another hose is provided. In this way a doubling of the pumping capacity is achieved without considerable additional expenditure.

According to a particular preferred embodiment of the invention, the hoses are on the input side as well as .ausgangsseitig the pump _s preferably via tees, interconnected because of the movement of the gate slide the promotion in the two

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Hoses 180 ° out of phase, is achieved in this way a low-pulsation flow of the pumped medium.

To further increase the delivery rate of the pump may preferably be provided in its extension transversely to the direction of movement, the slide link wider than the diameter of a hose and a plurality of tubes side by side.

9 · 11. 1978 54- 072 23

In the following, a preferred embodiment of the peristaltic pump according to the invention will be explained in more detail in the accompanying drawings:

Fig. 1s is a schematic side view of essential parts of this peristaltic pump,

FIG. 2: a section along the line H-II of FIG. 1 FIG.

e 1 shows six adjacently arranged slide links 1, which are mounted on a shaft 2 so eccentric that the directions of the eccentricities are offset for two adjacent slide gate 1 each by the same angle "The slide links have, as seen in Fig. 2" a substantially rectangular cross-section and are provided in its center with a substantially rectangular hole 3, which is penetrated by the shaft 2. Immediately on the shaft 2 sits for each gate valve 1, an eccentric 4- in a ball bearing 5 »whose diameter is equal to the height of the rectangular hole 3. The width of the hole 3, however, is chosen so large that the ball bearing 5 in the context of eccentric movement can move freely in the horizontal direction. Thereby and by the! Leadership of the slide link 1 in verti ler direction by four horizontal, parallel to the shaft 2'verlaufende rods 6 is achieved that when turning the shaft 2 by a "not shown) electric motor a pure on» and downward movement of the

9c 11th 1978 54 072 23

single slide gate 1 results.

Each eccentric 4 has two holes 8, which, calculated from the eccentric axis, at an angular distance of 60 ° to each other and for all eccentric 4 have the same position with respect to the direction of eccentricity. In this way you get without difficult Justierarbeit a 60 ° displacement of adjacent eccentric 4 thereby _$ that two mutually not corresponding holes 8 of two eccentric 4 aligned V / earth and inserted through it a pin-will. When the shaft 2 rotates, a wave-shaped movement of the envelopes of the upper sides 9 and of the lower sides 10 of the sliding links 1 results for the sliding blocks mounted on the shaft 2 with an offset of 60 °.

The slotted links 1 act with their tops 9 against a tube 11 and with their undersides 10 against a tube 12, both of which are guided approximately in the direction of the shaft axis, and press this position-dependent zusanmien more or less against abutment plates 13. The wave-shaped movement of the envelope of the upper sides 9 bz¬ j _{e of} the lower surfaces 10 thereby causes the pinch points in the direction of the axes of the tubes 11; 12 move forward so that there is a Plüssigke.itstransport "The upper tube 11 and the lower tube 12 can be connected to each other on the input side and on the output side by a (not shown) tee _e From Fig * 1 is easily apparent» that the uppermost tube 12, the lower tube 12, correspond to those of the upper tube 11 by 180 ° in phase.

9. 11. 1978 54- 072 23

This causes a delivery in the one hose to coincide with a delivery minimum in the other hose, so that pulsations are largely avoided in the flow brought together by the outlet-side T-piece. Moreover nglos possible using two tubes 11 through the erf indungsgeiaäßen at the hose pump zw _s; 12 on opposite sides of the sliding block 1, the pump power compared to a one-sea version doubled

The diameters of the dead hoses 11; 12 are on the order of one-half to a few millimeters, so that with still handy size of the sliding block 1, a juxtaposition of several hoses on both sides of the sliding block is possible «In this way, the flow rate for a medium can be further increased, or In each case, a hose from the top side and a hose from the underside of the sliding block slide can be combined via a ΐ piece, so that several media can be conveyed simultaneously with low pulsation «

As can be seen in Fig. 1, the shaft 2 is guided in ball bearings 14- sitting in vertical end walls 15. The end walls 15 also carry the guide rods 6 for vertical guidance of the sliding block slide 1 and the abutment plates 13, against which the hoses 11; 12 are compressed by the sliding block 1. Between the end walls 15 not shown housing plates which cover the movement mechanism of the pump to the outside »

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Claims (2)

9 · 11o 1978 54 072 23 Έ 04 B / 208 424 In vention Annex 1 »peristaltic pump with over each other angularly eccentric actuated pressure elements, which are arranged in the longitudinal direction of a hose side by side and circumferentially eccentric waves periodically squeeze the tube, characterized in that the pressure elements as by the eccentric (4) on the hose (11) and from this way forced motion gate valve (1) are formed » 2c peristaltic pump according to item 1, characterized in that the eccentrics (4) sit in holes (3) formed in the gate slides (1) and interact with the parts of the walls (3) facing the tube (11). " 3 © peristaltic pump according to item 1 or 2, characterized by »that guides are provided for guiding the sliding block slides (1) perpendicular to the hose * 4. peristaltic pump according to one of the points 1 to 3t characterized in that the eccentric (4) adjacent sliding block slide (1) are each offset by an equal angle to each other. 5 * hose pump according to item 4, characterized by u P, «. 9. ti. 1978 54 072 23 CT in that each eccentric (4) has two axially parallel bores (8) with a predetermined position for eccentricity, and that adjacent eccentrics are connected to each other by a pin which does not pass through corresponding bores. 5 "peristaltic pump according to one of the items 1 to 5, characterized in that a further hose (12) is provided on the side of the sliding block slide (1) facing away from the hose (11) in the direction of movement of the sliding block slide (1). 7 * peristaltic pump according to item 6, characterized in that the hoses (11, 12) are connected to each other at the pump inlet side and at the pump outlet side » 8- hose pump according to item 7 », characterized in that T pieces are provided for the connection, 9e peristaltic pump according to one of the items 1 to 8, characterized in that the sliding links (1) in their extension transverse to the direction of movement are wider than the diameter of a hose (11; 12) and that several hoses are provided side by side, For this Ί SSided drawings