DE19745999A1 - Modular miniature hose pump for delivering liquid media - Google Patents

Abstract

The pump has delivery head with a drive, e.g. an electric motor, a revolution rate controller which can also be combined with a torque controller, a housing and one or more software programs for controlling and regulating the drive. The pump head (1) and drive can be simply removed from the housing (2) and replaced by an identical, similar or different assembly. The removed pump head and drive can be placed in a further equipment, system or structure, e.g. a sample extractor, and operated independently of the hose pump housing. An Independent claim is also included for a peristaltic delivery pump head.

Description

Scope of the invention

The invention includes miniature peristaltic pump heads of various designs, one Board with digital control electronics and power section, one board with keyboard and display and a housing that connects all components together.

State of the art

In biotechnology, analytics, medicine, etc., it is common to use small amounts of a liquid Pump the medium with a peristaltic pump. The required sterility of the The pumped medium requires a sterile conveyor line. This requirement meets the well-known Principle of the peristaltic pump in an optimal and simple way, because already a sterile one Hose makes the pump sterile.

Providers of peristaltic peristaltic pumps are on the Numerous representations of the world market. The sizes and designs offered however, do not sufficiently meet current requirements. Available Peristaltic pumps do not achieve a delivery rate below 1 µl / min. The geometrical The dimensions of the products are too large for a large number of applications. Likewise the prerequisites for modular retrofitting and application Extension options in the sense of the patent application.

The conveying heads used usually have a roller rotor with at least three conveyor rollers ( Fig. 7) which convey the medium through the hose. This arrangement requires a minimum size of the delivery head to ensure the function of the peristaltic pump. The resulting small design of a pump head is still too large for many applications, especially in analytics.

The invention specified in claim 1 is based on the problem mechanical assemblies in the apparatus and devices in the field of biotechnology. To miniaturize analytics and medicine.

This problem is solved by the features listed in claim 1. Furthermore, the delivery performance is due to the features listed in claim 2 of the conveyor head significantly reduced compared to conventional devices and fulfills the Requirement to reduce the volume of the medium to a low necessary level. Small hose diameters and short hose connections undesirably reduce high dead volumes considerably and shorten process-disadvantageous dead times between Removal of measuring medium and recording of measured values.  

Explanation of drawings

The invention is further illustrated and described in several exemplary embodiments.

Show it:

Fig. 1 view peristaltic pump with pump head

Fig. 2 peristaltic pump with pump head and drive

Fig. 3 View peristaltic pump with combination pump head with bubble trap

Fig. 4 view peristaltic pump with external pump head in another device

Fig. 5 View of the eccentric pump head

Fig. 6 view of the variable outer contour

Fig. 7 commercial pump head with conveyor rollers

Fig. 8 compact arrangement of the pump heads

Fig. 9 possible wrap angle of the hose

Reference list

1

Pump head, round

2nd

Peristaltic pump housing

3rd

Display

4th

keyboard

5

Drive motor

6

Bubble trap, assembled

7

sampling

8th

Bioreactor

9

Pump head with eccentric disc

10th

Eccentric disc

11

Conveyor role

12th

Cover plate

13

Pump housing

14

Pump head adapter

Claims (2)

1. Compact peristaltic pump of particularly small design ( Fig. 1), consisting of a conveyor head, a drive for the conveyor head which is generally an electric motor, a speed control, which can also be combined with a torque control, or can replace the speed control, a housing and optionally one or more software programs for controlling and regulating the drive, which are usually located on electronic, optical, magnetic or other storage media, characterized in that the pump head with the associated drive can be removed from the housing in a simple manner ( FIG. 2 ) and can be replaced by an identical, similar or another assembly.
Peristaltic pump according to claim 1, characterized in that the removed pump head with drive in another device, system or structure, for. B. a sampling ( Fig. 4), can be introduced and performs its function regardless of the peristaltic pump housing. 2. Delivery pump head according to the peristaltic principle in a particularly small design ( Fig. 5), characterized in that the roller rotor with conveyor rollers is replaced by an eccentrically attached to the axis of rotation disc or conveyor roller, which has the task of the hose on the circumference at one Squeeze point against an annular outer wall and move this pinch point on the circumference by the rotation of the eccentric disc in order thus to promote the medium in the hose.
Feed pump head according to claim 2, characterized in that the outer contour of the feed pump head for compact arrangement ( Fig. 8) or for other purposes, as a circle, square, rectangle, or other geometries can be designed ( Fig. 6).
Delivery pump head according to claim 2, characterized in that the wrap angle of the delivery hose (Fig. 9) can be made between 360 ° and 720 ° or more, depending on the problem.
Feed pump head according to claim 2, characterized in that the cover of the feed pump head can be replaced by a bubble trap ( Fig. 3) for the purpose of bubble-free conveying of the conveying medium,