CN102032155A

CN102032155A - Peristaltic pump

Info

Publication number: CN102032155A
Application number: CN2009100705764A
Authority: CN
Inventors: 冯筠荪; 林隆正
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2011-04-27
Anticipated expiration: 2029-09-25
Also published as: CN102032155B

Abstract

The invention relates to a peristaltic pump which comprises a pump seat provided with an inner cavity with a cylindrical surface, and a cylindrical pump core that is supported by the pump seat at one end and matched with the inner cavity with a cylindrical surface of the pump seat, and can axially rotate around the center of the cylinder, wherein a plurality of roller wheels which can rotate around the radial direction of the cylindrical pump core and are arranged in a radial and annular shape are installed on the axial circular end surface of the cylindrical pump core close to the circular periphery, the pump seat is further provided with a pump cover which covers the roller wheels on the pump core, an annular space for placing a pump pipe is arranged between the roller wheels on the pump core and the pump cover, the pump pipe is annularly placed along the roller wheels on the pump core, and the pump cover is also provided with a groove for the pump pipe to pass through. By adopting the end-surface peristaltic pump working mechanism, the advantages of integration of a pump body of the peristaltic pump and the pump pipe, high conveying precision and the like can be exerted, and the peristaltic pump also has the characteristics of convenience in the replacement of the pump pipe, simple structure, low manufacturing cost, and convenience in miniaturization, thus being very beneficial to further popularization and application of the peristaltic pump technology.

Description

Peristaltic pump

Technical field

The invention belongs to a kind of positive displacement Special Pump, particularly relate to a kind of peristaltic pump.

Background technique

Peristaltic pump is a kind of chemical industry that is widely used in, food, and the positive displacement Special Pump of medicine and other fields is characterized in that the pump housing and conveyance conduit are one, and infusion precision height.Peristaltic pump has cylindrical structure and finger-type arrangement works mode usually, its working surface of cylindrical structure is a cylinder, the pump core is a cylindrical body, a series of rollers are installed in its cylndrical surface, with the common working space that forms of pump case in place the soft pump line of elasticity, the extruding pump line makes pump line form continuous wriggling during the rotation of pump core, advance flow of fluid, the cylinder peristaltic pump is simple in structure but change pump line inconvenience; The finger-type peristaltic pump working space is a straight line type, promote a series of finger shape slide block extruding pump lines of the type that is arranged in a straight line by cam set, form wriggling, advance flow of fluid, its advantage is to be convenient to change pump line, can avoid secondary pollution, therefore is widely used in medical science infusion pump technology at present, but its complex structure, manufacture process requirement is than higher.

Summary of the invention

The present invention provides a kind of delivery precision height for solving the technical problem that exists in the known technology, changes convenient, simple in structure, the cheap for manufacturing cost peristaltic pump of pump line.

The present invention for the technological scheme that solves the technical problem that exists in the known technology and take is: it include the pump seat that has the cylndrical surface inner chamber and by described pump seat support as an end and with described pump seat cylndrical surface inner chamber coupling and driven by power plant can be around the axial cylindrical pump core of rotation of cylindrical center, on the axial circular end surface of described cylindrical pump core, a plurality of rollers that can be circular layout to direction rotation and radial around described cylindrical pump core diameter are housed near the circular periphery place; The pump cover that roller on the described pump core is covered also is being installed on the described pump seat; Also have the annular space that can put into pump line between the roller of described pump core and described pump cover, described pump line circularizes placement along the roller of described pump core, the guide groove that in addition described pump line is passed on described pump cover.

The present invention can also adopt following technological scheme:

On the roller of described pump core and the pump cover in the annular space between the described pump cover, also be equipped with and place pump line and guarantee the stable pump line positioning element of pump line riding position.

Pointer-type indication dial plate by described pump core rotary driving is housed on described pump cover.

Advantage and good effect that the present invention has are: owing to adopted the end face peristaltic pump operation mechanism that is provided with the roller that can rotate along the cylindrical radial direction at the cylindrical end face of pump core, it is integrated to bring into play the peristaltic pump pump housing and pump line, the delivery precision advantages of higher makes again and change pump line conveniently simultaneously.Particularly the end face peristaltic pump is simple in structure, and is cheap for manufacturing cost, is convenient to the peristaltic pump microminiaturization, helps the further popularization and the application of peristaltic pump technology.The end face peristaltic pump is an important improvement for the conventional peristaltic pumps working principle, changes the roller mounting point, has changed the working space and the working method of peristaltic pump, has therefore improved several performances of peristaltic pump:

1. the change of working space:

The working space of cylinder peristaltic pump is cylinder volume poor of pump core and two same axis of pump case, it is a ring cylindrical space, when needs are often changed pump line, must guarantee the concentricity precision of the installation of these 2 axis, if depart from or tilt, cause the working space distortion, peristaltic pump can't proper functioning.

The working space of face type peristaltic pump is simple cylindrical body, and the installation precision error only influences cylindrical height, and flexible again pump line positioning element is changed pump line convenience simple to operation, and is stable and reliable for performance.

2. when peristaltic pump was worked, it was radially for the column type peristaltic pump that pump line is subjected to force direction, stressed relevant with the working space size with the pump line size, so the cylinder pump is very responsive to these factors; But to be subjected to force direction be axial to pump line for the face type peristaltic pump, and other has pump line assist location parts, thereby the end face peristaltic pump requires permissibility looser for caliber size, and adaptive capacity is strong.

In addition, compare with the cylinder peristaltic pump, the advantage of end face peristaltic pump is: pump cover is open, and it is convenient to change pump line.

In medical application as transfusion during purposes, need the frequent pump line of changing, the end face peristaltic pump can reduce the required precision for the pump line dimensional uniformity, the working clearance of cylindrical peristaltic pump is formed jointly by the cylinder of pump case and the cylinder of pump core, when producing radial missing between 2, working space becomes inhomogeneous.With operating angle is that 180 degree are example, when the pump line size increases, at inlet 0 degree of pump line with export 180 degree places, smaller between pump case and the pump core apart from dimensional changes, and at 90 degree places, distance between pump case and the pump core is relatively big, so pump line bears the pressure difference at diverse location, is difficult to guarantee the proper functioning of peristaltic pump.

And the distance between end face peristaltic pump pump cover and the pump core is looser with the pump line correlation degree, only needs to guarantee that pump line is formed suitable pressure size to get final product.For example, when the pump line external diameter changes, only need to change pump line positioning element size, promptly can guarantee proper functioning for same peristaltic pump.

2. when peristaltic pump tube self size was inhomogeneous, owing to use pump line assist location parts, the end face peristaltic pump was better than the performance that the cylinder peristaltic pump absorbs size deviation, and adaptability is stronger,

Prove that through practical proof it is reliably that the end face peristaltic pump uses, and produces a desired effect.It can be applied to medical apparatus, is to avoid secondary pollution, needs the frequent field of changing pump line, and simple to operate, no too high professional requirement.

Description of drawings

Fig. 1 is one of structural representation of the present invention;

Fig. 2 is two of a structural representation of the present invention.

Embodiment

For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

As shown in Figure 1, 2, have the cylndrical surface inner chamber pump seat 1, with pump seat 1 support as an end and with pump seat 1 cylndrical surface inner chamber coupling and can be around the cylindrical pump core 2 of cylindrical center's axial rotation, the rotating shaft of cylindrical pump core 2 is inserted in the central shaft hole of pump seat 1.On the axial circular end surface of cylindrical pump core 2, there are 4 can rotate and circularize the roller 8 of layout around cylindrical pump core 2 radial direction; Pump cover 5 also is installed on pump seat 1; Between the roller 8 of pump core 2 and pump cover 5 annular space that can put into pump line 3 is arranged, pump line 3 circularizes layout along the roller on the pump core 28.The groove 9 that on pump cover 5, pump line 3 is passed.Fixingly on the roller 8 of pump core 2 and the pump cover 5 in the annular space between the pump cover 5 can be inserted in pump line 3 and guarantee the stable pump line positioning element 4 of pump line 3 riding positions by being equipped with.Positioning element 4 can have various ways, and having the material that can hold pump line 3 as use is that whippy braided fabric tube chamber 7 reaches the fixedly annular flake of braided fabric tube chamber 7; Positioning element 4 also can adopt and be fixed with spacing guide pillar of elasticity that circular arc arranges or position limiting slide block etc. on pump cover 5, to limit the position of peristaltic pump tube 3.Between the rotating shaft of pump seat 1 insertion pump core 2, also bearing can be housed.In addition, on pump cover 5, be equipped with and the clock-type of pump core 2 coaxial rotation indication dial plate 6.Can adopt seam to be connected between pump cover 5 and the pump seat 1, also can adopt hinge-type to connect, can also adopt inserting column to be connected with plughole.

Pump seat 1 is in order to support pump core 2 and pump cover 5 is installed, pump core 2 can rotate around the pump shaft line, pump core 2 end faces are installed several as 6,8 ... with pump core 2 radially is that axis is the roller 8 of axle, can form working space jointly with pump cover 5 inner planes around the roller 8 of radially rotation rolling, pump line 3 circularizes placement along roller 8, during 3 rotations of pump core, roller 8 extruding pump lines 3 wrigglings, realize the liquid infusion function, pump cover 5 is installed pump line positioning element 4 and pump line 3, guarantees the proper functioning of peristaltic pump.Pump cover 5 can open wide, to make things convenient for laying of pump line 3.

Working principle is: as shown in Figure 1, 2, when pump core 2 rotated, moved along circumference thereupon the position of a series of rollers 8 extruding pump lines 3 of installing on the pump core 2, forms pump line 3 and wriggle continuously, flow of fluid in the propulsion tube.Pump line 3 circularizes in working space and lays, and they can be greater than 360 degree around angle, and promptly pump line 3 can round above.

For keeping the accuracy of pump line 3 and pump core 2 relative positions, use auxiliary pump line positioning element 4, restriction pump line 3 change in location can absorb the inevitable size deviation of pump line 3 manufacturing processes simultaneously, especially for the employed small size pump line 3 of miniature peristaltic pump when roller 8 rolls.

For midget plant, the power of end face peristaltic pump can adopt occasions such as motor or clockwork spring mechanical energy storage.

Control system can adopt the open loop stepper motor also can use the electro-optical feedback closed-loop direct current motor, and miniature automatic infusion system uses machinery energy storage mechanism.

Claims

1. peristaltic pump, it includes pump seat that has the cylndrical surface inner chamber and the cylindrical pump core that is supported as an end and mated with described pump seat cylndrical surface inner chamber and axially rotate around cylindrical center by described pump seat, it is characterized in that: on the axial circular end surface of described cylindrical pump core, a plurality of rollers that can be circular layout to direction rotation and radial around described cylindrical pump core diameter are housed near the circular periphery place; The pump cover that roller on the described pump core is covered also is being installed on the described pump seat; Also have the annular space that can put into pump line between the roller of described pump core and described pump cover, described pump line circularizes placement along the roller of described pump core, the guide groove that in addition described pump line is passed on described pump cover.

2. peristaltic pump according to claim 1 is characterized in that: also be equipped with on the roller of described pump core and the pump cover in the annular space between the described pump cover and can place pump line and guarantee the pump line positioning element that the pump line riding position is stable.

3. peristaltic pump according to claim 1 is characterized in that: the pointer-type indication dial plate by described pump core rotary driving is housed on described pump cover.