CN220036896U - Peristaltic pump roller device and peristaltic pump - Google Patents
Peristaltic pump roller device and peristaltic pump Download PDFInfo
- Publication number
- CN220036896U CN220036896U CN202321693698.0U CN202321693698U CN220036896U CN 220036896 U CN220036896 U CN 220036896U CN 202321693698 U CN202321693698 U CN 202321693698U CN 220036896 U CN220036896 U CN 220036896U
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- Prior art keywords
- peristaltic pump
- hose
- roller device
- wheel
- roller
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- 230000002572 peristaltic effect Effects 0.000 title claims abstract description 70
- 238000003825 pressing Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000010349 pulsation Effects 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The utility model discloses a peristaltic pump roller device and a peristaltic pump, wherein the peristaltic pump roller device comprises a roller frame, a driving wheel set, an auxiliary wheel set and a rotating connecting part, wherein the roller frame is provided with a plurality of rotating connecting parts along a circumferential circular array; the driving wheel group comprises a plurality of driving wheels which are rotationally connected to the rotation connecting part at intervals; the auxiliary wheel set comprises a plurality of auxiliary wheels which are rotatably connected to the rotary connecting part between two adjacent driving wheels; the diameter of the circumscribed circle of the auxiliary wheel set is smaller than that of the circumscribed circle of the driving wheel set; peristaltic pumps comprise the roller device described above. The peristaltic pump roller device and the peristaltic pump can effectively reduce pulsation, and meanwhile, the service life of the hose is not affected basically.
Description
Technical Field
The utility model belongs to the technical field of peristaltic pumps, and particularly relates to a peristaltic pump roller device and a peristaltic pump.
Background
Peristaltic pump is a very widely used pump, and is used in many fields such as medicine production and filling, cooling in medical operations, laboratory reagent dispensing, etc. However, peristaltic pumps have inherent disadvantages: the pulsation is large. The peristaltic pump alternately extrudes the hose by the rotating roller to realize liquid transmission, and when the roller releases the hose, the inner cavity volume of the outlet section of the hose becomes larger, so that the outlet flow is reduced and even suction is generated, and larger pulsation is caused. The general pulsation solution is to use a thin tube with high rotation speed or multiple rollers, and the two solutions inevitably cause the problem of obviously reduced flow rate at the same rotation speed. The liquid with the same volume is filled by the multiple rollers, the number of times that the pipe is extruded is obviously increased, the service life of the pipe is obviously reduced, and the driving resistance is obviously increased.
To this end, the utility model proposes a peristaltic pump roller device.
Disclosure of Invention
In order to solve the above technical problems, the present utility model provides a peristaltic pump roller device, which aims to solve or improve at least one of the above technical problems.
To achieve the above object, in one aspect of the present utility model, there is provided a peristaltic pump roller device comprising:
the roller frame is provided with a plurality of rotary connecting parts along a circumferential circular array;
the driving wheel set comprises a plurality of driving wheels which are rotationally connected to the rotation connecting part at intervals;
the auxiliary wheel set comprises a plurality of auxiliary wheels which are rotatably connected to the rotary connecting part between two adjacent driving wheels;
the diameter of the circumscribed circle of the auxiliary wheel set is smaller than that of the circumscribed circle of the driving wheel set.
According to the technical scheme, the peristaltic pump roller device can effectively reduce pulsation, the service life of a hose is basically unaffected, and the driving resistance is almost unchanged. The problems that pulsation cannot be reduced and flow is not obviously reduced under the same rotating speed in the prior art are effectively solved.
Preferably, the rotation connection part is a roller shaft vertically connected to one side of the roller frame.
Preferably, the roller frame has six rotational connection parts along a circumferential circular array, three non-adjacent roller shafts are rotationally connected with driving wheels, and the other three non-adjacent roller shafts are rotationally connected with auxiliary wheels.
Preferably, the auxiliary wheel is detachably connected to the rotating connection part in a rotating manner, so that the auxiliary wheels with different outer diameters can be conveniently replaced, and hoses with different pipe wall thicknesses can be suitable.
In another aspect of the utility model, there is also provided a peristaltic pump comprising:
a housing having an interior receiving cavity;
the pressing rail is fixedly arranged in the shell and is provided with a circular arc-shaped lower extrusion surface;
a peristaltic pump roller device according to any one of the preceding claims, the peristaltic pump roller device being located below the pressure rail and being driven to rotate by a drive mechanism;
and the hose penetrates through the lower extrusion surface and the peristaltic pump roller device.
Preferably, the gap between the outer surface of the driving wheel and the lower pressing surface is less than twice the thickness of the tube wall of the hose.
Preferably, the gap between the outer wheel surface of the driving wheel and the lower extrusion surface is 60% -80% of the double pipe wall thickness of the hose.
Preferably, the clearance between the outer tread of the auxiliary wheel and the lower pressing surface is greater than twice the wall thickness of the hose.
According to the peristaltic pump disclosed by the utility model, on the basis of a traditional peristaltic pump, an auxiliary wheel with smaller outer diameter and larger distance from a pressing rail gap is added between two adjacent driving wheels to be responsible for semi-extruding a hose, so that pulsation can be effectively reduced, and the service life of the hose is basically not influenced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a front view of a peristaltic pump roller device provided by an embodiment of the present utility model;
FIG. 2 is an exploded view of an embodiment of the present utility model;
FIG. 3 is a usage status effect diagram of an embodiment of the present utility model;
FIG. 4 is a view showing the state of the inner cavity of the driving wheel squeeze hose according to the embodiment of the present utility model;
FIG. 5 is a view showing the state of the inner cavity of the auxiliary wheel squeeze hose according to the embodiment of the present utility model;
FIG. 6 is a schematic diagram of the pulsations of the present conventional peristaltic pump;
fig. 7 is a schematic pulsation of a peristaltic pump with an auxiliary wheel.
In the figure: 1. a driving wheel; 2. an auxiliary wheel; 3. a roller shaft; 4. a roller frame; 5. pressing a rail; 6. a hose; phi A, diameter of the circumcircle of the driving wheel; phi B, the diameter of the auxiliary wheel circumcircle; d1, driving a wheel to press a pipe gap;
d2, auxiliary wheel pressure pipe clearance; m, facing the closing surface of the pipe wall; t, hose wall thickness; H. a hose gap; x, horizontal direction; y, vertical direction; f. a flow rate; s, time; c1, an extrusion period of a traditional peristaltic pump; c2, a peristaltic pump with an auxiliary wheel is used for one extrusion period; n1, impulse when the driving wheel loosens the hose; n2, pulse when the auxiliary wheel half extrudes the hose.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
The peristaltic pump roller device and peristaltic pump of the present utility model are described below with reference to fig. 1-7.
Example 1:
referring to fig. 1 and 2, fig. 1 and 2 show a schematic structural diagram of a peristaltic pump roller device according to an embodiment of the present utility model.
The peristaltic pump roller device comprises a disc-type roller frame 4, wherein a plurality of mounting holes are uniformly distributed in the circumferential direction at the center of the roller frame 4, roller shafts 3 are mounted in the mounting holes, the center of the roller frame 4 is connected with a driving mechanism for driving the roller shafts to rotate, in the embodiment, the number of the roller shafts 3 is six, three driving wheels 1 and three auxiliary wheels 2 are alternately connected to the six roller shafts 3 in a rotating manner, the three driving wheels 1 are uniformly distributed by taking the center of a wheel frame 5 as the center of a circle, the auxiliary wheels 2 are rotationally connected to the roller shafts 3 between every two driving wheels 1, the outer diameters of the three driving wheels 1 are equal, a driving wheel group is formed, the outer diameters of the three auxiliary wheels 2 are also the same, an auxiliary wheel group is formed, the circumscribed circle diameter phi B of the auxiliary wheel group is smaller than the circumscribed circle diameter phi A of the driving wheel group, the three driving wheels 1 are responsible for conveying liquid, and the three auxiliary wheels 2 are responsible for reducing pulsation.
The auxiliary wheel with the external circle smaller than the driving wheel is additionally arranged between the driving wheels on the basis of the traditional roller device, the hose can not be completely sealed when the hose is extruded by the auxiliary wheel, and the rebound amplitude of the hose is only reduced, so that the pulsation is reduced, and the technical purpose is realized.
Example 2:
referring to fig. 3, fig. 3 is a schematic structural diagram of a peristaltic pump according to another embodiment of the present utility model.
The peristaltic pump comprises a housing (not shown), a pressure rail 5, a hose 6 and the peristaltic pump roller device of example 1 disposed within the housing, and a drive mechanism (not shown) for driving the peristaltic pump roller device in rotation. The peristaltic pump roller device is arranged below the pressure rail 5, a certain gap is reserved between the peristaltic pump roller device and the pressure rail 5, and the hose 6 passes through the gap, as shown in fig. 3, when the peristaltic pump roller device is used in cooperation with the pressure rail 5, the pressure rail 5 is arranged inside the peristaltic pump, the peristaltic pump roller device is rotationally connected inside the peristaltic pump and is positioned below the pressure rail 5, the pressure rail 5 is provided with a semicircular abutting surface matched with the driving wheel 1 and the auxiliary wheel 2, the semicircular abutting surface and the roller device are provided with a gap for accommodating the hose 6 to pass through, and the gap between the driving wheel 1 and the pressure rail 5 is obviously smaller than the gap between the auxiliary wheel 2 and the pressure rail 5 because the diameter phi A of the circumscribing circle of the driving wheel is larger than the diameter phi B of the circumscribing circle of the auxiliary wheel. When the roller shaft 3 rotates clockwise, the driving wheel 1 can crush the hose 6 to push the liquid in the hose 6 to the outlet, and when the driving wheel 1 releases the hose 6, the auxiliary wheel 2 can squeeze the hose 6 of the outlet section and not completely squeeze the hose 6, so that a closed cavity is not formed; the auxiliary wheel 2 only reduces the rebound amplitude of the hose 6, so that the degree of enlargement of the inner cavity of the hose is reduced, and a part of pulsation is restrained; since the inner cavity of the hose 6 is not closed, the pipe pressing gap is large, so that the rolling resistance is much smaller than when the driving wheel 1 presses the hose 6, and unnecessary loss is not caused to the hose 6.
As shown in fig. 4, fig. 4 is a view showing the state of the inner cavity of the driving wheel squeeze hose. The inner wall is completely closed after the driving wheel 1 presses the hose 6, and in order to ensure that the inner wall does not leak, it is necessary to ensure that the press tube gap is less than twice the hose wall thickness T, i.e. the driving wheel press tube gap D1 of the driving wheel 1 is less than 2*T. The normal pressure pipe gap is 60% -80% of the double hose wall thickness T, so that two sides can be flattened and closed to form a closing surface M of the opposite pipe wall, and leakage is avoided.
As shown in fig. 5, fig. 5 is a state diagram of an inner cavity of the auxiliary wheel squeeze hose. When the auxiliary wheel 2 presses the hose 6, the inner wall of the hose 6 is not completely closed, but a part of hose gap H is left, the wall thickness of the hose is T, the auxiliary wheel pressing pipe gap D2 is more than 2 x T, and d2-2*T =h is more than 0.
As shown in fig. 6, fig. 6 is a schematic pulsation diagram of a conventional peristaltic pump. The flow rate is reduced or even sucked back during the release of the hose by the driving wheel in one squeezing cycle C1 of the conventional peristaltic pump, namely, the inner cavity volume of the outlet section of the hose is no longer linearly reduced or even increased due to the loosening of the hose. A large pulsation occurs. Fig. 6 shows three squeezing cycles corresponding to the pulse shape of one revolution of a peristaltic pump comprising three driving wheels.
As shown in fig. 7, fig. 7 is a schematic pulse diagram of the peristaltic pump with auxiliary wheel, showing a pulse diagram of one squeeze cycle C2 of the peristaltic pump with auxiliary wheel. When the driving wheel loosens the hose, the outlet section is also provided with an auxiliary wheel which half-extrudes the hose, so that the rebound amplitude of the hose is reduced, and the flow pulsation amplitude is reduced. Taking this embodiment as an example, that is, a peristaltic pump including three driving wheels as an example, three auxiliary wheels are needed, and compared with a traditional peristaltic pump with three driving wheels, the flow is smaller and the pulsation is reduced under the condition that the pressure rail is the same in size. The flow will be greater and the pulsation will be greater compared to a six-drive-wheel conventional peristaltic pump of the same size. However, the number of times the hose is squeezed and closed is the same as that of a three-drive-wheel conventional peristaltic pump, so that the service life of the hose is basically the same as that of the three-drive-wheel conventional peristaltic pump, and the required driving force is similar to that of the three-drive-wheel conventional peristaltic pump.
It can be understood that the scheme of the utility model is not limited to a three-driving-wheel peristaltic pump, but is also suitable for a four-driving-wheel peristaltic pump, and pulsation can be effectively reduced only by adding an auxiliary wheel with larger gap between every two driving wheels for half-squeezing the hose.
The technical effects and progress of the embodiment of the utility model are as follows: the peristaltic pump roller device has the advantages of simple structure and low cost, is improved on the basis of the traditional peristaltic pump, can obviously reduce pulsation, does not influence the service life of a hose, and has certain technical effects and progress.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (8)
1. A peristaltic pump roller device, comprising:
the roller frame (4) is provided with a plurality of rotary connecting parts along the circumferential circular array;
a drive wheel set comprising a plurality of drive wheels (1) rotatably connected at intervals on the rotational connection;
the auxiliary wheel set comprises a plurality of auxiliary wheels (2) which are rotatably connected to the rotary connection part between two adjacent driving wheels (1);
the diameter of the circumscribed circle of the auxiliary wheel set is smaller than that of the circumscribed circle of the driving wheel set.
2. Peristaltic pump roller device according to claim 1, characterized in that the rotational connection is a roller shaft (3) connected vertically to one side of the roller frame (4).
3. Peristaltic pump roller device according to claim 2, characterized in that the roller frame (4) has six roller shafts (3) in a circumferential circular array, three non-adjacent roller shafts (3) are rotatably connected with a driving wheel (1), and the other three non-adjacent roller shafts (3) are rotatably connected with an auxiliary wheel (2).
4. Peristaltic pump roller device according to claim 1, characterized in that the auxiliary wheel (2) is detachably rotatably connected to the rotational connection.
5. A peristaltic pump, comprising:
a housing having an interior receiving cavity;
the pressing rail (5) is fixedly arranged in the shell, and the pressing rail (5) is provided with a circular arc-shaped lower extrusion surface;
peristaltic pump roller device according to any one of claims 1 to 4, located below said pressure rail (5) and driven in rotation by a driving mechanism;
and a hose (6), wherein the hose (6) penetrates between the lower extrusion surface and the peristaltic pump roller device.
6. Peristaltic pump according to claim 5, characterized in that the gap between the outer wheel surface of the driving wheel (1) and the lower squeeze surface is less than twice the wall thickness of the hose (6).
7. Peristaltic pump according to claim 6, characterized in that the gap between the outer wheel surface of the driving wheel (1) and the lower squeeze surface is 60% to 80% of the double wall thickness of the hose (6).
8. Peristaltic pump according to any one of claims 5 to 7, characterized in that the gap between the outer wheel surface of the auxiliary wheel (2) and the lower squeeze surface is greater than twice the wall thickness of the hose (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321693698.0U CN220036896U (en) | 2023-06-30 | 2023-06-30 | Peristaltic pump roller device and peristaltic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321693698.0U CN220036896U (en) | 2023-06-30 | 2023-06-30 | Peristaltic pump roller device and peristaltic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220036896U true CN220036896U (en) | 2023-11-17 |
Family
ID=88736701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321693698.0U Active CN220036896U (en) | 2023-06-30 | 2023-06-30 | Peristaltic pump roller device and peristaltic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220036896U (en) |
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2023
- 2023-06-30 CN CN202321693698.0U patent/CN220036896U/en active Active
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