Roller assembly and peristaltic pump

Abstract

The embodiment of the utility model discloses a roller wheel assembly and a peristaltic pump. The roller wheel assembly comprises a roller wheel frame, a roller column; the roller wheel shaft is arranged on the roller wheel frame, the roller wheel shaft is arranged on the roller wheel column in a penetrating mode, the part, located in the roller wheel column, of the roller wheel shaft comprises a contact part and a gap part, the contact part makes contact with the inner wall of the roller wheel column, and a gap is formed between the gap part and the inner wall of the roller wheel column. Due to the fact that the gap is formed between the gap part and the inner wall of the roller column, the contact area of the roller shaft and the roller column is reduced, heat caused by mutual friction is reduced, the temperature of the roller assembly is lowered, and melting or sintering of the roller column can be prevented. And the peristaltic pump driving assembly is prevented from stopping working due to over-temperature protection. And the operation efficiency and the service life of the peristaltic pump are improved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of peristaltic pumps, and in particular to a roller assembly and a peristaltic pump. Background Art

[0002] A peristaltic pump is a device that transfers liquids through the peristaltic principle. Its working principle is based on the periodic squeezing and releasing of one or more bellows or peristaltic tubes, which drives the flow of liquid through this movement. Peristaltic pumps are widely used in many industries due to their precise flow control.

[0003] Peristaltic pumps are widely used in different industries, one of which is in the field of agricultural plant protection. In this application scenario, peristaltic pumps are mainly used for spraying pesticides. Their precise flow control capabilities and stability make them an ideal choice for liquid spraying in the agricultural field. In addition, peristaltic pumps are also commonly used in medical, laboratory, food and beverage industries, and water treatment industries to transport drugs, laboratory reagents, food liquids, and chemicals.

[0004] The inventor of the utility model discovered during the process of implementing the utility model that during pump operation, the relative rotational motion between the roller column and the roller shaft generates friction, and the friction between the contact surfaces of the roller column and the roller shaft generates a large amount of heat, causing the roller device and the peristaltic tube to be overheated or even damaged, thereby affecting the service life and efficiency of the peristaltic pump. Utility Model Content

[0005] In view of the above problems, the embodiments of the utility model provide a roller assembly and a peristaltic pump, which reduce the friction between the contact surface of the roller column and the roller shaft, reduce the generated heat and thus increase the service life of the peristaltic pump.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a roller assembly, including: a roller frame; a roller column; a roller shaft, which is arranged on the roller frame, and the roller shaft passes through the roller column, and the part of the roller shaft located in the roller column includes a contact part and a gap part, the contact part contacts the inner wall of the roller column, and there is a gap between the gap part and the inner wall of the roller column.

[0007] Optionally, the gap portion includes a first groove, and the first groove is arranged in a spiral shape along the axial direction of the roller shaft.

[0008] Optionally, the gap portion includes a plurality of second grooves, the contact portion includes a plurality of contact segments, and the second grooves and the contact segments are alternately arranged along the axial direction of the roller shaft.

[0009] Optionally, the roller frame includes a first disk portion, a connecting portion and a second disk portion, two ends of the connecting portion are respectively fixed to the first disk portion and the second disk portion, and two ends of the roller shaft are respectively arranged on the first disk portion and the second disk portion.

[0010] Optionally, the first disk portion is provided with a first through hole, and the second disk portion is provided with a second through hole; the roller shaft comprises an axis body, a clamping piece and a shaft cap located at one end of the axis body, a clamping groove is provided at the other end of the axis body, the contact portion and the gap portion are both located on the axis body, and the other end of the axis body passes through the first through hole, the roller column and the second through hole in sequence, the shaft cap abuts against the surface of the first disk portion facing away from the second disk portion, the clamping piece is clamped in the clamping groove, and the clamping piece abuts against the surface of the second disk portion facing away from the first disk portion.

[0011] Optionally, the shaft cap is provided with an anti-rotation portion, and a limiting portion is provided on a surface of the first disk portion facing away from the second disk portion, and the limiting portion cooperates with the anti-rotation portion to limit the rotation of the roller shaft relative to the roller frame.

[0012] Optionally, the anti-rotation portion includes two limiting planes formed on the side wall of the shaft cap, the two limiting planes are arranged opposite to each other, the limiting portion includes a limiting groove formed on the surface of the second disk portion, the limiting groove includes two limiting flat walls arranged opposite to each other, and one of the limiting flat walls abuts against one of the limiting planes.

[0013] Optionally, the roller assembly further includes a lubricating medium, and the lubricating medium is filled between the roller shaft and the inner wall of the roller column.

[0014] Optionally, there are multiple roller columns and roller shafts, and the multiple roller shafts are arranged around the roller frame at intervals, and one roller shaft passes through one roller column.

[0015] In order to solve the above technical problems, another technical solution provided by the utility model is: to provide a peristaltic pump, including a pump housing, a driving assembly, a peristaltic tube and the above-mentioned roller assembly; the driving assembly is drivingly connected to the roller frame, the pump housing is provided with a receiving chamber, a water inlet and a water outlet, the roller assembly and the peristaltic tube are both located in the receiving chamber, and the roller assembly abuts the peristaltic tube, the two ends of the peristaltic tube are respectively connected to the water inlet and the water outlet, the driving assembly is connected to the roller assembly, the driving assembly is used to drive the roller assembly to rotate, and when the roller assembly rotates, the roller assembly squeezes the peristaltic tube.

[0016] In the embodiment of the utility model, the roller assembly includes a roller frame; a roller column; a roller shaft, which is arranged on the roller frame, and the roller shaft is passed through the roller column. The part of the roller shaft located in the roller column includes a contact part and a gap part, and the contact part contacts the inner wall of the roller column, and there is a gap between the gap part and the inner wall of the roller column. Since there is a gap between the gap part and the inner wall of the roller column, the contact area between the roller shaft and the roller column is reduced, thereby reducing the heat caused by mutual friction, reducing the temperature of the roller assembly, and helping to prevent the melting or sintering of the roller column; and preventing the peristaltic pump drive assembly from stopping working due to over-temperature protection. The operating efficiency and service life of the peristaltic pump are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of a peristaltic pump provided by an embodiment of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of a peristaltic pump provided by an embodiment of the utility model;

[0020] Figure 3 It is an exploded schematic diagram of a roller assembly provided in an embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a roller shaft provided by an embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a roller assembly provided in an embodiment of the utility model;

[0023] Figure 6 It is a schematic structural diagram of another roller shaft provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1000, peristaltic pump;

[0026] 1. Pump housing; 11. Receiving chamber; 12. Water inlet; 13. Water outlet;

[0027] 2. Peristaltic tube;

[0028] 3. Roller assembly; 31. Roller column; 32. Roller shaft; 321. Contact portion; 322. Gap portion; 3221. First groove; 3222. Second groove; 323. Clamping groove; 324. Anti-rotation portion; 3241. Position-limiting plane; 325. Shaft cap; 326. Clamping piece; 327. Shaft body; 33. Roller frame; 331. First disk portion; 3311. First through hole; 332. Second disk portion; 3321. Second through hole; 333. Connecting portion; 334. Position-limiting portion; 3341. Position-limiting groove; 33411. Position-limiting flat wall;

[0029] 4. Drive components. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. If the terms "first", "second", etc. appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0033] Peristaltic pumps are commonly used in the fields of agricultural plant protection, medical treatment, laboratories, food and beverage industry, and water treatment. They are used to transport drugs, laboratory reagents, food liquids, and chemicals.

[0034] However, the peristaltic tube of the peristaltic pump will be subjected to considerable stress during the peristaltic movement, resulting in wear of the roller shaft, roller column and peristaltic tube. During the operation of the pump, the relative rotational movement of the roller column and the roller shaft generates friction, and the friction of the contact surface between the roller column and the roller shaft generates a large amount of heat, which can easily cause the plastic roller column to melt during operation, or the metal roller column and the roller shaft to sinter. In order to solve the heat dissipation problem, it is necessary to use materials with stronger performance, or add auxiliary rotating components such as bearings, which will increase the manufacturing and process costs of parts. At the same time, some peristaltic pumps also have the problem of small size and compact structure and cannot add auxiliary components such as bearings. On the other hand, the temperature of the roller shaft and roller column of the existing peristaltic pump is easy to rise when it is working. Superimposed with the heat generation of the motor, the motor temperature is too high to affect the working efficiency of the peristaltic pump, thereby affecting the service life of the peristaltic pump.

[0035] In view of this, an embodiment of the utility model provides a peristaltic pump, which reduces the heat generated when the roller shaft rotates relative to the roller column by reducing the contact area between the roller shaft and the roller column.

[0036] Based on the above design ideas, the specific structure of the peristaltic pump is explained in detail below.

[0037] See also Figure 1 and Figure 2 The peristaltic pump 1000 includes a pump housing 1, a drive assembly 4, a peristaltic tube 2 and a roller assembly 3. The roller assembly 3 and the peristaltic tube 2 are both located in the pump housing 1, and the roller assembly 3 abuts against the peristaltic tube 2. The drive assembly 4 is connected to the roller assembly 3. The drive assembly 4 is used to drive the roller assembly 3 to rotate. When the roller assembly 3 rotates, the roller assembly 3 periodically squeezes and releases the peristaltic tube 2, so that the liquid flows from one end of the peristaltic tube 2 to the other end of the peristaltic tube 2, thereby promoting the flow of the liquid.

[0038] For the pump housing 1 described above, please refer to Figure 2 The pump housing 1 is provided with a receiving chamber 11, a water inlet 12 and a water outlet 13. The roller assembly 3 and the peristaltic tube 2 are both located in the receiving chamber 11. The two ends of the peristaltic tube 2 are respectively connected to the water inlet 12 and the water outlet 13. When the roller assembly 3 rotates, the roller assembly 3 periodically squeezes and releases the peristaltic tube 2, so that the liquid enters the peristaltic tube 2 from the water inlet 12 and is output from the water outlet 13, thereby realizing the pumping function. Installing the drive assembly 4, the peristaltic tube 2 and the roller assembly 3 in the pump housing 1 can protect the drive assembly 4, the peristaltic tube 2 and the roller assembly 3, and prevent the drive assembly 4, the peristaltic tube 2 and the roller assembly 3 from being directly exposed.

[0039] For the above-mentioned drive assembly 4, the drive assembly 4 includes a motor (not shown) and a reducer (not shown), the motor and the reducer are installed in the pump housing 1, the output end of the motor is connected to the reducer through a gear, and the roller assembly 3 is connected to the output shaft of the reducer through a pump head adapter (not shown). The motor is connected to the roller assembly 3 through the reducer, which can increase the torque output from the drive assembly 4 to the roller assembly 3 and reduce the load of the motor. The roller assembly 3 is provided with a bearing to facilitate the drive assembly 4 to drive the roller frame 33 to rotate.

[0040] For the above roller assembly 3, see Figure 3 The roller assembly 3 includes a roller column 31, a roller shaft 32 and a roller frame 33. The roller shaft 32 is arranged on the roller frame 33, and the roller shaft 32 is passed through the roller column 31. The axis of the roller shaft 32 is parallel to the rotation center axis of the roller frame 33. When the roller frame 33 rotates, the roller shaft 32 can rotate with the roller frame 33. The roller column 31 is a hollow cylindrical structure. The axis of the roller shaft 32 is coaxial with the axis of the roller column 31. The roller shaft 32 and the roller column 31 can rotate relative to each other. The driving assembly 4 is connected to the roller frame 33. The driving assembly 4 drives the roller frame 33 to rotate, and the roller frame 33 drives the roller shaft 32 to rotate. In this process, the roller column 31 and the roller shaft 32 can rotate relative to each other, and the roller column 31 periodically squeezes and releases the peristaltic tube 2, thereby realizing liquid transportation.

[0041] For the above roller frame 33, please continue to refer to Figure 3 The roller frame 33 includes a first plate portion 331, a connecting portion 333 and a second plate portion 332. The first plate portion 331 and the second plate portion 332 are both circular. The two ends of the connecting portion 333 are respectively fixed to the first plate portion 331 and the second plate portion 332, and the connecting portion 333 is located at the center of the first plate portion 331 and the second plate portion 332. The first plate portion 331 is provided with a first through hole 3311, and the second plate portion 332 is provided with a second through hole 3321. The first through hole 3311 and the second through hole 3321 are used to install the roller shaft 32.

[0042] For the roller shaft 32 mentioned above, see Figure 3 and Figure 4, including a shaft body 327, a clamping member 326 and a shaft cap 325 located at one end of the shaft body 327. The cross-sectional area of ​​the shaft cap 325 is larger than the cross-sectional area of ​​the shaft body 327. A clamping slot 323 is provided at the other end of the shaft body 327. The other end of the shaft body 327 passes through the first through hole 3311, the roller column 31 and the second through hole 3321 in sequence. The shaft cap 325 abuts against the surface of the first disk portion 331 away from the second disk portion 332. The clamping member 326 is clamped in the clamping slot 323. The clamping member 326 abuts against the surface of the second disk portion 332 away from the first disk portion 331, thereby fixing the roller shaft 32 on the roller frame 33, so that when the roller frame 33 rotates, the roller shaft 32 can be driven to rotate with the roller frame 33. The clamping slot 323 and the clamping member 326 are clamped and assembled to limit the movement of the roller shaft 32 in the axial direction.

[0043] In some embodiments, see Figure 4 and Figure 5 The shaft cap 325 is provided with an anti-rotation portion 324, and a limiting portion 334 is provided on the surface of the first disk portion 331 away from the second disk portion 332, and the limiting portion 334 cooperates with the anti-rotation portion 324 to limit the rotation of the roller shaft 32 relative to the roller frame 33. The specific forms of the anti-rotation portion 324 and the limiting portion 334 are not limited, as long as they can limit the rotation of the roller shaft 32 relative to the roller frame 33, for example: the anti-rotation portion 324 includes two limiting planes 3241 formed on the side wall of the shaft cap 325, the two limiting planes 3241 are arranged oppositely, the limiting portion 334 includes a limiting groove 3341 formed on the surface of the second disk portion 332, the limiting groove 3341 includes two limiting flat walls 33411 arranged oppositely, and one limiting flat wall 33411 abuts against one limiting plane 3241, which can limit the rotation of the anti-rotation portion 324, thereby limiting the rotation of the roller shaft 32.

[0044] It should be noted that the number of roller shafts 32 is not limited to one, and the number of roller shafts 32 can be multiple, for example, two, three, five, seven, etc. Similarly, the number of the first through hole 3311, the second through hole 3321 and the limit portion 334 is also multiple, the multiple first through holes 3311 are arranged at intervals along the circumference of the first disk portion 331, and the multiple second through holes 3321 are arranged at intervals along the circumference of the second disk portion 332. The other end of the shaft body 327 of a roller shaft 32 passes through a first through hole 3311, a roller column 31 and a second through hole 3321 in sequence, and the clamping member 326 is clamped in the clamping groove 323 at the other end of the shaft body 327, so that the multiple roller shafts 32 are arranged at intervals along the circumference of the roller frame 33. When the roller frame 33 rotates, the multiple roller shafts 32 can squeeze and release the peristaltic tube 2 in sequence, and the time interval between squeezing and releasing the peristaltic tube 2 can be shortened.

[0045] In some embodiments, see Figure 4The part of the shaft 327 located in the roller column 31 includes a contact portion 321 and a gap portion 322. The cross-sectional area of ​​the contact portion 321 is larger than the cross-sectional area of ​​the gap portion 322. The contact portion 321 contacts the inner wall of the roller column 31, and there is a gap between the gap portion 322 and the inner wall of the roller column 31. Since there is a gap between the gap portion 322 and the inner wall of the roller column 31, the contact area between the roller shaft 32 and the roller column 31 is reduced, thereby reducing the heat caused by mutual friction, reducing the temperature of the roller assembly 3, helping to prevent the roller column 31 from melting or sintering, and preventing the drive assembly 4 of the peristaltic pump 1000 from stopping working due to over-temperature protection. The operating efficiency and service life of the peristaltic pump 1000 are improved.

[0046] In addition, in order to further reduce the friction between the roller shaft 32 and the roller column 31 and reduce the generated heat, the roller assembly 3 further includes a lubricating medium (not shown), which is filled between the roller shaft 32 and the inner wall of the roller column 31 at the contact portion 321, between the gap portion 322 and the inner wall of the roller column 31, and between the outer wall of the roller column 31 and the peristaltic tube 2. Adding the lubricating medium can reduce wear and reduce the generated heat. The lubricating medium can be lubricating oil or grease.

[0047] In some embodiments, see Figure 4 The gap portion 322 includes a first groove 3221, and the first groove 3221 is arranged in a spiral shape along the axial direction of the roller shaft 32. The gap portion 322 and the contact portion 321 are both spirally arranged on the peripheral wall of the roller shaft 32, extending from one end of the roller shaft 32 to the other end. The gap between the first groove 3221 and the inner wall of the roller column 31 can store a certain amount of lubricating medium, which is conducive to lubrication. Moreover, the spiral design allows the lubricating medium to be transferred to different positions along the first groove 3221 as the roller shaft 32 rotates during the operation of the peristaltic pump 1000, thereby improving the uniformity of the distribution of the lubricating medium between the roller shaft 32 and the roller column 31, which helps to improve the lubrication effect, enhance the friction reduction effect, and extend the life of the component.

[0048] Please note that Figure 6 In order to reduce the contact area between the roller shaft 32 and the roller column 31 and enhance the heat dissipation effect, the gap portion 322 may also include a plurality of second grooves 3222, and the contact portion 321 includes a plurality of contact segments, and the second grooves 3222 and the contact segments are alternately arranged along the axial direction of the roller shaft 32.

[0049] In some embodiments, see Figure 6 The second groove 3222 is in the shape of an annular groove, and two annular grooves are arranged at intervals on the peripheral wall of the roller shaft 32.

[0050] It should be understood that the shape of the second groove 3222 can be changed, such as setting it as an annular groove, a spiral groove, etc., so that multiple second grooves 3222 and contact sections are staggered, and the number of grooves in the gap portion 322 can also be two, three, four, five, etc. according to actual needs, all of which can achieve the effect of reducing the contact area and thus reducing frictional heat generation.

[0051] In some embodiments, a plurality of recessed small holes (not shown) are provided on the peripheral wall of the roller shaft 32, and the gap portion 322 includes a plurality of small holes arranged at intervals. The function of the small holes is similar to that of the grooves, and the contact area between the roller shaft 32 and the roller column 31 can also be reduced without affecting the structural strength of the roller shaft 32.

[0052] In the embodiment of the utility model, there is a gap between the gap portion 322 and the inner wall of the roller column 31, which reduces the contact area between the roller shaft 32 and the roller column 31, thereby reducing the heat caused by mutual friction, reducing the temperature of the roller assembly 3, and helping to prevent the melting or sintering of the roller column; and preventing the peristaltic pump 1000 drive assembly 4 from stopping due to over-temperature protection. The operating efficiency and service life of the peristaltic pump 1000 are improved; at the same time, because no auxiliary rotating parts such as bearings are required, the cost is reduced.

[0053] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A roller assembly, characterized in that: include: Roller frame; Roller column; A roller shaft is arranged on the roller frame, and the roller shaft passes through the roller column. The part of the roller shaft located in the roller column includes a contact part and a gap part. The contact part contacts the inner wall of the roller column, and there is a gap between the gap part and the inner wall of the roller column.

2. The roller assembly according to claim 1, characterized in that: The gap portion includes a first groove, and the first groove is arranged in a spiral shape along the axial direction of the roller shaft.

3. The roller assembly according to claim 1, characterized in that: The gap portion includes a plurality of second grooves, the contact portion includes a plurality of contact segments, and the second grooves and the contact segments are alternately arranged along the axial direction of the roller shaft.

4. The roller assembly according to claim 1, characterized in that: The roller frame includes a first disk portion, a connecting portion and a second disk portion, two ends of the connecting portion are respectively fixed to the first disk portion and the second disk portion, and two ends of the roller shaft are respectively arranged on the first disk portion and the second disk portion.

5. The roller assembly according to claim 4, characterized in that: The first disc portion is provided with a first through hole, and the second disc portion is provided with a second through hole; The roller shaft includes an axis body, a clamping piece and an axis cap located at one end of the axis body, a clamping groove is provided at the other end of the axis body, the contact portion and the gap portion are both located on the axis body, the other end of the axis body passes through the first through hole, the roller column and the second through hole in sequence, the axis cap abuts against the surface of the first disk portion facing away from the second disk portion, the clamping piece is clamped in the clamping groove, and the clamping piece abuts against the surface of the second disk portion facing away from the first disk portion.

6. The roller assembly according to claim 5, characterized in that: The shaft cap is provided with an anti-rotation portion, and a limiting portion is provided on a surface of the first disc portion facing away from the second disc portion, and the limiting portion cooperates with the anti-rotation portion to limit the rotation of the roller shaft relative to the roller frame.

7. The roller assembly according to claim 6, characterized in that: The anti-rotation portion includes two limiting planes formed on the side wall of the shaft cap, the two limiting planes are arranged opposite to each other, the limiting portion includes a limiting groove formed on the surface of the second disk portion, the limiting groove includes two limiting flat walls arranged opposite to each other, and one limiting flat wall abuts against one limiting plane.

8. The roller assembly according to any one of claims 1 to 7, characterized in that: The roller assembly further comprises a lubricating medium, and the lubricating medium is filled between the roller shaft and the inner wall of the roller column.

9. The roller assembly according to any one of claims 1 to 7, characterized in that: There are multiple roller columns and roller shafts, and the multiple roller shafts are arranged around the roller frame at intervals, and one roller shaft passes through one roller column.

10. A peristaltic pump, characterized in that: It comprises a pump housing, a drive assembly, a peristaltic tube and a roller assembly according to any one of claims 1 to 8; The driving assembly is drivingly connected to the roller frame, the pump housing is provided with a receiving chamber, a water inlet and a water outlet, the roller assembly and the peristaltic tube are both located in the receiving chamber, and the roller assembly abuts against the peristaltic tube, the two ends of the peristaltic tube are respectively connected to the water inlet and the water outlet, the driving assembly is connected to the roller assembly, and the driving assembly is used to drive the roller assembly to rotate, and when the roller assembly rotates, the roller assembly squeezes the peristaltic tube.

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