Peristaltic pump

Abstract

The utility model relates to a peristaltic pump. The peristaltic pump comprises a driving motor; a pump cavity is defined in the pump shell, and the driving motor is fixedly connected to the pump shell; the pipe assembly comprises a hose at least partially located in the pump cavity; the rolling wheel assembly is arranged in the pump cavity, the rolling wheel assembly comprises a rolling wheel support and a plurality of rolling wheels, an axial lead is limited on the rolling wheel support, the rolling wheels are rotatably installed on the rolling wheel support, the rolling wheel support is in transmission connection with the driving motor, and the rolling wheels make contact with and extrude the hose; wherein the roller support is provided with a first disc and a second disc which are far away from each other in the axial direction, the hose is located between the first disc and the second disc, and the first disc and the second disc protrude outwards in the radial direction relative to the rollers. Compared with the prior art, according to the peristaltic pump provided by the technical scheme of the utility model, the first disc and the second disc of the roller bracket protrude outwards in the radial direction to form a limiting structure aiming at the hose. According to the mode, the internal structure of the peristaltic pump is effectively simplified, and the production cost of the peristaltic pump is reduced.

Description

Technical Field

[0001] This utility model relates to the field of micropump technology, and in particular to a peristaltic pump. Background Technology

[0002] Peristaltic pumps are increasingly widely used in various technical fields such as chemical, food, medical, and papermaking due to their numerous advantages, including no pollution, high precision, low shear force, and strong corrosion resistance. A peristaltic pump generally includes a drive motor as the power source, a pump head with several rollers, a transmission mechanism that connects the rollers to the drive motor, and a flexible hose for containing the fluid. At least part of the hose is located inside the pump head and is compressed by the rollers, causing the fluid within the hose to flow downstream.

[0003] When a peristaltic pump is working, the flexible tube inside the pump head will move back and forth along the axis of the roller support, so it is necessary to limit the movement of the tube. Existing peristaltic pumps generally have corresponding limiting structures formed on the pump head cover and base, but this method makes the structure of the pump cover and base complex, which to some extent increases the production cost of peristaltic pumps. Utility Model Content

[0004] To address the inconvenience of forming a limiting structure on the pump cover and base, the purpose of this utility model is to provide a peristaltic pump that uses a roller bracket to limit the hose.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a peristaltic pump, comprising: a drive motor; a pump housing defining a pump chamber, the drive motor being fixedly connected to the pump housing; a tubing assembly including a flexible tube at least partially located within the pump chamber; and a roller assembly disposed within the pump chamber, the roller assembly including a roller bracket defining an axis and a plurality of rollers rotatably mounted on the roller bracket, the roller bracket being drively connected to the drive motor, the rollers contacting and squeezing the flexible tube; wherein, the roller bracket has a first disc and a second disc axially spaced apart from each other, the flexible tube being located between the first disc and the second disc, and both the first disc and the second disc protruding radially outward relative to the plurality of rollers.

[0006] In the above technical solution, preferably, the radial distance between the first disc and the inner wall of the pump cover is less than the wall thickness of the hose, and the radial distance between the second disc and the inner wall of the pump cover is less than the wall thickness of the hose.

[0007] In the above technical solution, preferably, the peristaltic pump further includes a worm gear fixedly mounted on the drive motor and a worm wheel fixedly connected to the roller bracket, the worm wheel being coaxially arranged with the roller bracket, and the worm gear meshing with the worm wheel. More preferably, the worm wheel is integrally formed with the second disc.

[0008] In the above technical solution, preferably, the roller bracket further includes an axially extending column, and the first disc, the column, and the second disc are integrally formed.

[0009] In the preferred embodiment described above, and even more preferably, the roller assembly further includes a plurality of roller shafts, and the first disk and the second disk are respectively provided with a plurality of first mounting holes and a plurality of second mounting holes, the first mounting holes and the second mounting holes being axially aligned, the two ends of the roller shafts being respectively interference-fitted with the first mounting holes and the second mounting holes, and the rollers being rotatably mounted on the roller shafts.

[0010] In the above preferred embodiment, more preferably, the column is formed with a plurality of radially inwardly recessed relief grooves, and at least part of the roller is located in the relief grooves and forms a clearance fit with the column.

[0011] Compared to existing technologies, the peristaltic pump provided by this invention features first and second discs of the roller bracket protruding radially outward to form a limiting structure for the hose. This effectively simplifies the internal structure of the peristaltic pump and reduces its production cost. Attached Figure Description

[0012] Figure 1 The three-dimensional peristaltic pump provided by this utility model Figure 1 ;

[0013] Figure 2 for Figure 1 The diagram shows a side sectional view of the pump head of the peristaltic pump.

[0014] Figure 3 for Figure 1 The three-dimensional pump head of the peristaltic pump shown Figure 1 The pump cover was removed.

[0015] Figure 4 for Figure 1 The three-dimensional pump head of the peristaltic pump shown Figure 2 The base was removed.

[0016] Figure 5 for Figure 1 A perspective view of the roller assembly of the peristaltic pump shown.

[0017] The image is labeled as follows:

[0018] 100. Peristaltic pump;

[0019] 1. Drive motor; 11. Motor housing;

[0020] 2. Pump casing; 21. Base; 211. Opening; 212. Bolt hole; 22. Pump cover;

[0021] 31. Pipe fitting; 32. Flexible hose;

[0022] 41. Roller bracket; 411. First disc; 412. Second disc; 413. Column; Y-axis;

[0023] 42. Roller shaft; 43. Roller;

[0024] 51. Worm gear; 52. Worm wheel. Detailed Implementation

[0025] To explain in detail the technical content, structural features, achieved objectives and effects of this application, the technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings.

[0026] In this application, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” said other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0027] In this application, the term "fixed connection" refers to a connection method in which two components are formed through interference fit, adhesive bonding, threaded connection, integral molding, etc., and can remain relatively fixed without external force. It is understood that this "fixed connection" includes detachable fixed connection methods.

[0028] In this application, unless otherwise specified, the term "axial" refers to the direction of the axis of the roller support; the term "radial" refers to the direction perpendicular to the axis of the roller support.

[0029] This invention provides a peristaltic pump, which aims to limit the hose by using a roller bracket, thereby simplifying the internal structure of the peristaltic pump and reducing the thickness of the peristaltic pump in the direction of the roller axis.

[0030] like Figure 1 As shown, the peristaltic pump 100 includes a drive motor 1 as a power source, a pump housing 2 defining a pump chamber (not shown in the figure), a pipe assembly for containing and transporting fluid, a roller assembly for forcing the fluid to flow, and a transmission assembly for drivingly connecting the roller assembly and the drive motor 1. The pump housing 2 includes a base 21 and a pump cover 22 detachably mounted on the base 21, with the pump chamber defined inside the base 21 and the pump cover 22. The pump housing 2, the pipe assembly, the roller assembly, and part of the transmission assembly together form the pump head of the peristaltic pump 100.

[0031] The drive motor 1 includes a motor housing 11, a drive shaft (not shown in the figure) protruding outward from the motor housing 11, and several fastening bolts (not shown in the figure) that are threadedly connected to the motor housing 11. The base 21 has an opening 211 that passes through its side wall and several bolt holes 212. The output shaft of the drive motor 1 enters the pump chamber through the opening 211, and the fastening bolts securely lock the drive motor 1 to the base 21 through the bolt holes 212.

[0032] Combination Figure 3-4 The pump cover 22 is detachably connected to the base 21 via several snap-fit ​​structures and fastening bolts. The pump cover 22 has a pair of pipe interfaces with slots (not shown in the figure). The pipe assembly includes a pair of pipe connectors 31 fixed to the pair of pipe interfaces via a plug-in structure, and a flexible hose 32 connected between the pair of pipe connectors 31. The flexible hose 32 is in fluid communication with the pipe connectors 31, and is located within the pump chamber and extends along the inner wall of the pump cover 22. At least a portion of the pair of pipe connectors 31 protrudes from the pump head, serving to connect to external pipes and secure the pipe assembly to the pump head.

[0033] See Figure 2 and 5 The roller assembly includes a roller bracket 41 defining a centerline Y, a roller shaft 42 fixedly mounted on the roller bracket 41, and a plurality of rollers 43 rotatably mounted on the roller shaft 42. The centerlines of the roller shaft 42 and the rollers 43 are both parallel to the centerline Y of the roller bracket 41. In this embodiment, the drive motor 1 is side-mounted, that is, the centerline of the drive motor 1 is perpendicular to the centerline Y of the roller bracket 41; in other embodiments, the drive motor may also be front-mounted, that is, the centerline of the drive motor is parallel to the centerline of the roller bracket.

[0034] The roller bracket 41 includes a first disk 411 and a second disk 412 that are axially spaced apart from each other. The roller bracket 41 also includes an axially extending column 413 located between the first and second disks. In this embodiment, the first disk 411, column 413, and second disk 412 are integrally formed. In other embodiments, the first and second disks and the column can also be detachably connected by means of snap-fit, threaded connection, plug-in connection, etc.

[0035] The first and second discs of the roller bracket 41 are respectively provided with a plurality of first mounting holes (not shown in the figure) and a plurality of second mounting holes (not shown in the figure) arranged axially opposite to the plurality of first mounting holes. The roller shaft 42 is inserted axially into the first and second mounting holes and forms an interference fit with the first and second mounting holes, thereby fixing the roller shaft 42 to the roller bracket 41.

[0036] Furthermore, the column 413 provided in this embodiment has several radially inwardly recessed relief grooves (not shown in the figure), and at least part of the roller 43 is located in the corresponding relief groove and forms a clearance fit with the column 413. Thus, the overall size of the roller assembly can be minimized while ensuring the structural strength of the column 413.

[0037] When the peristaltic pump 100 is working, the drive motor 1 drives the roller support 41 to rotate around the axis Y, and the roller 43 contacts and squeezes the hose 32. As a result, the fluid in the hose 32 is pushed downstream by the roller 43, and the fluid is transported forward in a peristaltic manner.

[0038] The first and second discs of the roller bracket 41 are both configured to protrude radially outward relative to each roller 43. Thus, the first and second discs of the roller bracket 41 form a limiting structure that restricts the axial movement of the hose 32. Compared to conventional limiting structures formed on the base and pump cover, this method effectively simplifies the pump housing structure and reduces the production cost of the peristaltic pump.

[0039] Furthermore, when the radial clearance between the first and second discs of the roller bracket 41 and the inner wall of the pump cover 22 is greater than the wall thickness of the hose (in this application, "wall thickness" refers to the wall thickness on one side of the hose), the hose 32 may come into contact with the approximately acute-angled edges of the first and second discs. This contact and scraping of the hose 32 by the first and second discs reduces its service life. Therefore, in the peristaltic pump 100 provided in this application, the radial distance between the first and second discs of the roller bracket 41 and the inner wall of the pump cover 22 is less than the wall thickness of the hose 32, ensuring that the hose 32 always contacts the radial end faces of the first and second discs.

[0040] Continue reading Figure 3-4This invention employs a worm gear transmission structure. Specifically, the transmission assembly of the peristaltic pump 100 includes a worm 51 located within the pump chamber and a worm wheel 52 meshing with the worm 51. The worm 51 is fixedly mounted on the drive shaft 12 of the drive motor 1 and can be rotated by the drive shaft 12. The worm wheel 52 is fixedly connected to the roller bracket 41 and is coaxially arranged with the roller bracket 41. Thus, the drive motor 1 can drive the roller bracket 41 to rotate.

[0041] Furthermore, in order to reduce the overall size of the peristaltic pump 100, the worm gear 52 and the second disk 412 of the roller bracket 41 provided in this embodiment are integrally formed.

[0042] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be construed as limiting the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit of this application should be included within the scope of protection of this application.

Claims

1. A peristaltic pump characterized by, include: Drive motor; A pump housing defines a pump chamber, and the drive motor is fixedly connected to the pump housing; Tubing assembly, including a hose at least partially located within the pump chamber; as well as A roller assembly is disposed within the pump chamber. The roller assembly includes a roller bracket defining an axis and a plurality of rollers rotatably mounted on the roller bracket. The roller bracket is drively connected to the drive motor. The rollers contact and squeeze the hose. The roller bracket has a first disk and a second disk that are axially spaced apart from each other, and the hose is located between the first disk and the second disk. Both the first disk and the second disk protrude radially outward relative to the plurality of rollers.

2. The peristaltic pump of claim 1, wherein, The radial distance between the first disc and the inner wall of the pump casing is less than the wall thickness of the hose, and the radial distance between the second disc and the inner wall of the pump casing is less than the wall thickness of the hose.

3. A peristaltic pump according to claim 1 or 2, characterised in that, It also includes a worm gear fixedly mounted on the drive motor and a worm wheel fixedly connected to the roller bracket. The worm wheel is coaxially arranged with the roller bracket, and the worm gear meshes with the worm wheel.

4. The peristaltic pump of claim 3, wherein, The worm gear and the second disk are integrally formed.

5. A peristaltic pump according to claim 1 or 2, wherein The roller bracket also includes an axially extending column, and the first disc, the column, and the second disc are integrally formed.

6. The peristaltic pump of claim 5, wherein, The roller assembly further includes several roller shafts. Several first mounting holes and several second mounting holes are respectively provided on the first disk and the second disk. The first mounting holes and the second mounting holes are aligned axially. The two ends of the roller shaft are respectively interference-fitted with the first mounting holes and the second mounting holes. The roller is rotatably mounted on the roller shaft.

7. The peristaltic pump of claim 5, wherein, The column has several radially inward recessed relief grooves, and at least part of the roller is located in the relief grooves and forms a clearance fit with the column.

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