A peristaltic pump and a control method thereof

Abstract

The present invention relates to the technical field of peristaltic pumps, and discloses a peristaltic pump and a control method thereof, wherein the peristaltic pump comprises a working matching plate, on which a working plane is provided; a peristaltic tube is used to circulate fluid, and the peristaltic tube can be elastically deformed; a pressing plane is provided on the peristaltic pressing plate, which can move horizontally so that at least part of the peristaltic tube is located between the pressing plane and the working plane; the peristaltic pressing plate can be raised and lowered so that the pressing plane squeezes the peristaltic tube toward the side where the working plane is located; an anti-backflow device I and the working matching plate are distributed along the flow direction of the fluid in the peristaltic tube, and can selectively connect or disconnect the peristaltic tube. Compared with the prior art in which a roller moves horizontally to squeeze fluid, the peristaltic tube between the pressing plane and the working plane is evenly stressed, which reduces damage to the peristaltic tube; and there is no rolling between the peristaltic pressing plate and the peristaltic tube, so the friction resistance is small, which prolongs the service life of the peristaltic tube and reduces the maintenance cost of the peristaltic pump.

Description

Technical Field

[0001] The present invention relates to the technical field of peristaltic pumps, and in particular to a peristaltic pump and a control method thereof. Background Art

[0002] The biopharmaceutical, medical, chemical and other industries have high requirements for measurement accuracy, and currently roller peristaltic pumps are mostly used for quantitative measurement.

[0003] The working principle of the roller peristaltic pump is as follows: control the roller to rise so that the roller presses on the elastic hose, and then control the roller to move horizontally for a certain distance. During the horizontal movement of the roller, the elastic hose will be squeezed to squeeze out the fluid in the elastic hose.

[0004] The above roller peristaltic pump has the following technical problems when working:

[0005] (1) The matching accuracy between the roller and the elastic hose is not high. The roller squeezes the elastic hose during horizontal movement, which has the defect of uneven squeezing of the elastic hose, resulting in a reduced service life of the elastic hose and increased maintenance costs of the peristaltic pump.

[0006] (2) When the roller moves horizontally to squeeze the elastic hose, the friction between the roller and the elastic hose is relatively large, which can easily cause the hose to undergo plastic deformation, thereby reducing the service life of the elastic hose, shortening the replacement cycle of the elastic hose, and increasing the maintenance cost of the peristaltic pump.

[0007] Therefore, there is an urgent need for a peristaltic pump and a control method thereof to solve the above technical problems. Summary of the invention

[0008] The purpose of the present invention is to provide a peristaltic pump and a control method thereof, which can extend the service life of the peristaltic tube and reduce the maintenance cost of the peristaltic pump.

[0009] To achieve this object, the present invention adopts the following technical solutions:

[0010] A peristaltic pump, comprising:

[0011] A working matching plate, wherein the working matching plate is provided with a working plane;

[0012] A peristaltic tube, the peristaltic tube is used for circulating fluid, and the peristaltic tube can be elastically deformed;

[0013] A peristaltic pressing plate, wherein a pressing plane is provided on the peristaltic pressing plate, and the peristaltic pressing plate can be moved horizontally so that at least part of the peristaltic tube is located between the pressing plane and the working plane; the peristaltic pressing plate can be raised and lowered so that the pressing plane presses the peristaltic tube toward the side where the working plane is located;

[0014] The backflow prevention device I and the working matching plate are distributed along the flow direction of the fluid in the peristaltic tube, and can selectively connect or disconnect the peristaltic tube.

[0015] As a preferred embodiment of the peristaltic pump, the peristaltic tube comprises an inlet section, a working section and an outlet section which are sequentially arranged along the fluid flow direction, and the working section is arranged opposite to the working plane;

[0016] The above peristaltic pump also includes:

[0017] A first clamping structure, used to support and fix the inlet section;

[0018] The second clamping structure is used to support and fix the outlet section.

[0019] As a preferred embodiment of the peristaltic pump, the peristaltic tube further comprises:

[0020] The backflow prevention device II can selectively connect or disconnect the above outlet section.

[0021] As a preferred embodiment of the peristaltic pump, the anti-backflow device I and the anti-backflow device II both include:

[0022] Backflow prevention plate;

[0023] An eccentric roller, part of the peristaltic tube is located between the anti-backflow plate and the eccentric roller; the eccentric roller can rotate and rise and fall to selectively clamp the peristaltic tube between the anti-backflow plate and the eccentric roller to disconnect the peristaltic tube, or separate from the peristaltic tube to connect the peristaltic tube;

[0024] The anti-backflow motor, the output shaft of the anti-backflow motor is drivingly connected with the eccentric roller and the output shaft and the eccentric roller are eccentrically arranged, and the anti-backflow motor is used to drive the eccentric roller to rotate and lift.

[0025] As a preferred embodiment of the peristaltic pump, the peristaltic pump further comprises:

[0026] The first support plate is provided with a pipe inlet hole for passing the inlet section, and the backflow prevention device I is located between the first support plate and the first clamping structure.

[0027] As a preferred embodiment of the peristaltic pump, the peristaltic pump further comprises:

[0028] The second support plate is provided with a pipe outlet hole for penetrating the outlet section, and the backflow prevention device II is located between the second support plate and the second clamping structure.

[0029] As a preferred solution of the above-mentioned peristaltic pump, the above-mentioned inlet section is higher than the above-mentioned working section, and the above-mentioned outlet section is not higher than the working section.

[0030] As a preferred solution of the above-mentioned peristaltic pump, the above-mentioned peristaltic tube has a transition section, the two ends of the above-mentioned transition section are respectively connected to the above-mentioned inlet section and the above-mentioned working section, and the above-mentioned transition section is inclined;

[0031] The peristaltic pump further comprises an inclined support plate for supporting the transition section so that the connection position between the inlet section and the transition section remains in a connected state.

[0032] As a preferred embodiment of the above-mentioned peristaltic pump, a plurality of the above-mentioned peristaltic tubes are provided.

[0033] In order to achieve the above object, the present invention also provides a control method of the peristaltic pump based on any of the above schemes, comprising the following steps:

[0034] The peristaltic tube is disconnected by the anti-backflow device, and the peristaltic pressing plate separated from the peristaltic tube is controlled to move horizontally, so that the length of the pressing plane facing the working plane along the horizontal moving direction of the peristaltic tube is equal to the preset length;

[0035] When the peristaltic pressing plate is controlled to rise and fall, the peristaltic pressing plate presses the peristaltic tube, so that the vertical distance between the working plane and the pressing plane is a preset distance.

[0036] Beneficial effects of the present invention: the peristaltic pump provided by the present invention has a working plane on the working matching plate and a pressing plane on the peristaltic pressing plate. The area opposite to the pressing plane and the working plane is adjusted by horizontally moving the peristaltic pressing plate, so as to adjust the amount of fluid pumped at a single time. The peristaltic tube upstream of the working matching plate is disconnected by the anti-backflow device I, and the peristaltic pressing plate is controlled to rise and fall so that the peristaltic pressing plate squeezes the peristaltic tube between it and the working matching plate, so as to achieve one-time pressing in place. Compared with the prior art in which the roller moves horizontally to squeeze the fluid, the peristaltic tube between the pressing plane and the working plane is evenly stressed, thereby reducing damage to the peristaltic tube. Moreover, there is no rolling between the peristaltic pressing plate and the peristaltic tube, so the friction resistance is small, thereby extending the service life of the peristaltic tube and reducing the maintenance cost of the peristaltic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0038] Figure 1 is a schematic structural diagram of a peristaltic pump provided in an embodiment of the present invention;

[0039] Figure 2 is a schematic structural diagram of a pressing backflow prevention device provided in an embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of a workflow provided by an embodiment of the present invention.

[0041] In the figure:

[0042] 1. Peristaltic pressing plate; 2. Working matching plate;

[0043] 3. Peristaltic tube; 31. Inlet section; 32. Transition section; 33. Working section; 34. Outlet section;

[0044] 4. Anti-backflow device I; 41. Eccentric roller; 42. Anti-backflow plate; 43. Anti-backflow motor; 5. Anti-backflow device II;

[0045] 6. First clamping structure; 61. Inclined support plate; 7. Second clamping structure;

[0046] 8. Top block; 9. Linear drive assembly; 10. Lifting drive assembly; 11. First support plate; 12. Second support plate. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] The existing peristaltic pump uses a roller to squeeze the peristaltic tube and move it horizontally for a certain distance to achieve quantitative measurement of the fluid. However, it has the disadvantages of low measurement accuracy, short service life of the peristaltic tube and high maintenance cost of the peristaltic pump. Therefore, this embodiment provides a peristaltic pump to improve the measurement accuracy of the peristaltic pump, extend the service life of the peristaltic tube, and reduce the maintenance cost of the peristaltic pump.

[0052] like Figure 1 As shown, the peristaltic pump provided in this embodiment includes a peristaltic pressing plate 1, a working cooperation plate 2, a peristaltic tube 3 and an anti-backflow device I4, wherein the peristaltic tube 3 can undergo elastic deformation, a working plane is provided on the working cooperation plate 2, and a pressing plane is provided on the peristaltic pressing plate 1, and the peristaltic pressing plate 1 can move horizontally so that at least part of the working section is located between the pressing plane and the working plane; the pressing plate can be raised and lowered so that the pressing plane squeezes the peristaltic tube 3 toward the side where the working plane is located; the anti-backflow device I4 and the working cooperation plate 5 are distributed in sequence along the fluid flow direction in the peristaltic tube 3, and the anti-backflow device I4 can selectively connect or disconnect the peristaltic tube 3.

[0053] When the peristaltic pump is not working, the peristaltic pressing plate 1 is separated from the peristaltic tube 3. When the peristaltic pump is used to meter fluid, the peristaltic tube 3 is disconnected by the anti-backflow device I4, the peristaltic pressing plate 1 is controlled to move horizontally so that at least part of the peristaltic tube 3 is located between the pressing plane and the working plane, and then the peristaltic pressing plate 1 is controlled to move up and down so that the pressing plane squeezes the peristaltic tube toward the side where the working plane is located. Since the peristaltic tube 3 is cut off by the anti-backflow device I4 located upstream of the working matching plate 2, the fluid in the peristaltic tube 3 will flow to the outlet of the peristaltic tube 3 under the pressing action of the peristaltic pressing plate 1.

[0054] The peristaltic pump provided in the present embodiment adjusts the area opposite to the pressing plane and the working plane by horizontally moving the peristaltic pressing plate 1, thereby adjusting the amount of fluid pumped at a single time. By controlling the lifting and lowering of the peristaltic pressing plate 1, the peristaltic pressing plate 1 squeezes the peristaltic tube 3 located between it and the working matching plate 2, thereby overcoming the cumulative errors in various links in the implementation process of the prior art and achieving one-time pressing in place. Compared with the prior art in which the roller moves horizontally to squeeze the fluid, the peristaltic tube 3 between the pressing plane and the working plane is evenly stressed, thereby reducing the damage to the peristaltic tube 3. Moreover, there is no rolling between the peristaltic pressing plate 1 and the peristaltic tube 3, and the friction resistance is small, thereby extending the service life of the peristaltic tube 3 and reducing the maintenance cost of the peristaltic pump.

[0055] In this embodiment, the inlet of the peristaltic tube 3 is used to connect the fluid source, and the peristaltic tube 3 includes an inlet section 31, a working section 32 and an outlet section 34 arranged in sequence along the flow direction of the fluid inside the peristaltic tube 3. Among them, the anti-backflow device 14 is arranged corresponding to the inlet section 31, and is used to connect or disconnect the inlet section 31.

[0056] Optionally, the peristaltic pump further comprises a peristaltic housing, and the peristaltic pressing plate 1, the working cooperation plate 2 and the anti-backflow device 14 are all arranged in the peristaltic housing, and the peristaltic housing mainly plays a protective role. The peristaltic housing comprises a shell body with an opening at the upper end and a cover plate, and the cover plate 15 and the shell body are detachably connected to block the opening at the upper end of the shell body, so as to facilitate the maintenance of the structure in the peristaltic housing. Exemplarily, the working cooperation plate 2 and the peristaltic pressing plate 1 are both plate-like structures, the working cooperation plate 2 is located above the peristaltic pressing plate 1, and the working cooperation plate 2 is fixed below the cover plate.

[0057] Optionally, in the process of the peristaltic pressing plate 1 rising to squeeze the peristaltic tube 3, in order to prevent the peristaltic tube 3 from shaking, causing the peristaltic tube 3 to deviate from the pressing plane and the working plane, thereby affecting the metering accuracy. For this reason, a clamping structure for fixing the peristaltic tube 3 is added, and two clamping structures are provided, which are respectively recorded as the first clamping structure 6 and the second clamping structure 7, wherein the first clamping structure 6 is used to support and fix the inlet section 31, and the second clamping structure 7 is used to support and fix the outlet section 4. As for the specific structure of the clamping structure, a conventional fixed pipeline structure can be adopted, which will not be described in detail here.

[0058] Alternatively, if Figure 2As shown, the backflow prevention device 14 includes a backflow prevention plate 42, an eccentric roller 41 and a backflow prevention motor 43, the peristaltic tube 3 is located between the backflow prevention plate 42 and the eccentric roller 41, and the output shaft of the backflow prevention motor 43 is in transmission connection with the eccentric roller 41, and is used to drive the eccentric roller 41 to rotate, so as to selectively squeeze the peristaltic tube 3 toward the side where the backflow prevention plate 42 is located to disconnect the peristaltic tube 3, or separate from the peristaltic tube 3 to connect the peristaltic tube 3. Exemplarily, the output shaft of the backflow prevention motor 43 is arranged horizontally, the backflow prevention plate 42 is located above the eccentric roller 41, the backflow prevention plate 42 is fixed to the cover plate, and the inlet section 31 is located between the backflow prevention plate 42 and the eccentric roller 41.

[0059] When the peristaltic tube 3 needs to be disconnected by the anti-backflow device I4, the anti-backflow motor 43 is controlled to work, and the anti-backflow motor 43 drives the eccentric roller 41 to rotate, and the eccentric roller 41 is used to rotate and squeeze the peristaltic tube 3, so that the peristaltic tube 3 is disconnected.

[0060] It should be noted that the backflow prevention device I4 may also adopt other structures, such as a switch valve, which may be a manual switch valve or an electromagnetic switch valve.

[0061] like Figure 3 As shown, optionally, in order to achieve the continuity of the peristaltic pump operation, the outlet section 34 of the peristaltic tube 3 is equipped with an anti-backflow device II5, which is used to selectively connect or disconnect the peristaltic tube 3. After one extrusion is completed, before the peristaltic pressing plate 4 descends, the anti-backflow device II5 is used to disconnect the outlet section 34 of the peristaltic tube 3; then the peristaltic pressing plate 4 is controlled to descend, and the anti-backflow device I4 is controlled to operate to connect the inlet section 31 of the peristaltic tube 3, thereby achieving continuous pumping of liquid by the peristaltic pump. The structure of the anti-backflow device II5 is the same as that of the anti-backflow device I4, and will not be repeated here.

[0062] Optionally, in order to prevent the two anti-backflow devices from causing the peristaltic tube 3 to be unstable when being disconnected, in this embodiment, the peristaltic pump further comprises a first support plate 11, on which a tube inlet hole is provided for penetrating the inlet section, and the anti-backflow device I4 is located between the first support plate 11 and the first clamping structure 6. Such an arrangement can improve the stability of the peristaltic tube 3 during the process in which the anti-backflow device I4 disconnects the inlet section 31. The peristaltic pump further comprises a second support plate 12, on which a tube outlet hole is provided for penetrating the outlet section 34, and the anti-backflow device II5 is located between the second support plate 12 and the second clamping structure 7. Such an arrangement can improve the stability of the peristaltic tube 3 during the process in which the anti-backflow device II5 disconnects the outlet section 34.

[0063] It should be noted that the first support plate 11 and the second support plate 12 in this embodiment refer to two opposite side plates of the shell body.

[0064] Optionally, the inlet section 31 is higher than the working section 33. By utilizing the height difference of their positions, the fluid in the inlet section 31 can be introduced into the working section 33 more smoothly, and the working section 33 can be fully filled with the fluid. Optionally, the working section 33 is not lower than the outlet section 34. During the pressing process, the fluid is more easily discharged from the outlet section 34.

[0065] In order to make the inlet section 31 higher than the working section 33, the first clamping structure 6 is higher than the working mating surface of the working mating plate 2. Due to the height difference between the inlet section 31 and the outlet section 34, there is a transition section 32 between the inlet section 31 and the outlet section 34. The transition section 32 is tilted, and the two ends of the transition section 32 are respectively connected to the inlet section 31 and the working section 33. When the transition section 32 is unsupported, the transition section 32 is in a suspended state and is concave due to the influence of gravity. The inappropriate inclination angle of the transition section 32 will cause the fluid to be unable to flow normally at the junction of the transition section 32 and the inlet section 31, or even completely disconnected so that the peristaltic pump cannot work normally. To this end, the peristaltic pump also includes an inclined support plate 61, which supports the transition section 32 so that the connection position of the inlet section 31 and the transition section 32 remains in a connected state.

[0066] In this embodiment, the second clamping structure 7 and the backflow prevention device II5 are fixedly mounted on the same bracket, which is fixedly mounted on the shell body; the inclined support plate 61 and the first clamping structure 6 and the backflow prevention device I4 are fixedly mounted on the same bracket, which is fixed on the shell body. The downward inclination angle of the inclined support plate 61 relative to the horizontal plane can be determined according to the diameter of the peristaltic tube 3, so that the connection position of the inlet section 31 and the transition section 32 remains in a connected state, so the specific inclination angle of the inclined support plate 61 is no longer limited here.

[0067] The peristaltic pump provided in this embodiment also includes a linear drive assembly 9, which is used to drive the horizontal reciprocating movement of the peristaltic pressing plate 1. Preferably, the linear drive assembly 9 is a motor screw structure. Specifically, the linear drive assembly 9 includes a first bracket, a first motor, a first screw and a first slider, the fixed end of the first motor is fixed on the first bracket, the output end of the first motor is connected to one end of the first screw, the other end of the first screw is rotatably connected to the first bracket, the first screw is provided with a first slider threadedly connected thereto, the first slider is threadedly connected to the first screw, the first slider is slidably connected to the first bracket in the horizontal direction, and plays a role in guiding and limiting the movement of the first slider, and the first slider is fixedly connected to the peristaltic pressing plate. The first motor drives the first screw to rotate, and the first slider moves axially along the first screw, and the horizontal movement of the first slider drives the peristaltic pressing plate to move horizontally. It should be noted that in other embodiments, the linear drive assembly 9 can also be a telescopic cylinder such as an oil cylinder, a gas cylinder, an electric push rod, etc., or a motor gear rack structure, or a connecting rod slider structure, etc., which will not be specifically introduced here.

[0068] The peristaltic pump provided in this embodiment also includes a lifting drive assembly 10, which is used to drive the linear drive assembly 9 to rise and fall, thereby realizing the lifting and falling of the peristaltic pressing plate 1. Preferably, the lifting drive assembly 9 is a motor screw structure. Specifically, the lifting drive assembly 9 includes a second bracket, a second motor, a second screw and a second slider, wherein the bottom of the peristaltic housing is fixed with a second bracket, the fixed end of the second motor is fixedly mounted on the second bracket, the output end of the second motor is connected to one end of the second screw, the other end of the second screw is rotatably connected to the second bracket, the second slider is threadedly connected to the second screw, the second slider is slidably connected to the second bracket in the vertical direction, and plays a role in guiding and limiting the movement of the second slider, and the second slider is fixedly connected to the first bracket. The second motor drives the second screw to rotate, and the second slider moves axially along the second screw, and the lifting and falling of the second slider drives the first bracket to rise and fall, thereby realizing the lifting and falling of the peristaltic pressing plate. It should be noted that in other embodiments, the lifting drive assembly 10 can also be a telescopic cylinder such as an oil cylinder, a cylinder, an electric push rod, etc., or a motor gear rack structure, or a connecting rod slider structure, etc., which will not be specifically introduced here.

[0069] In other embodiments, the output end of the linear drive component 9 can also be fixedly connected to the jacking drive component 10, and the output end of the jacking drive component 10 can be directly fixedly connected to the peristaltic pressing plate 1. The linear drive component 9 can be used to drive the jacking drive component 10 to move horizontally, and the jacking drive component 10 can be used to directly drive the peristaltic pressing plate 1 to move up and down.

[0070] Preferably, at least two peristaltic tubes 3 are provided, and a plurality of peristaltic tubes 3 can be squeezed at the same time by one peristaltic pressing plate 1. It should be noted that the number of peristaltic tubes 3 can be set according to actual needs, and one peristaltic pressing plate 1 can press one peristaltic tube 3, and a linear drive assembly 9 can be used to drive multiple peristaltic pressing plates 1 to move horizontally at the same time.

[0071] This embodiment also provides a control method for the peristaltic pump, comprising the following steps:

[0072] The peristaltic tube 3 is disconnected by the anti-backflow device 1, and the peristaltic pressing plate 1 separated from the peristaltic tube 3 is controlled to move horizontally, so that the length of the pressing plane facing the working plane along the horizontal moving direction of the peristaltic tube 3 is equal to the preset length;

[0073] When the peristaltic pressing plate 1 is controlled to rise and fall, the peristaltic pressing plate 1 presses the peristaltic tube 3 so that the vertical distance between the working plane and the pressing plane is a preset distance.

[0074] The preset length is determined according to the amount of fluid to be measured. In order to improve the accuracy of measurement and avoid the spacing between the working plane and the pressing plane being too small, which causes the peristaltic tube 3 to be completely disconnected and the inlet section 31 to expand and deform under a greater pressure, the minimum spacing between the working plane and the pressing plane is limited. When the spacing between the working plane and the pressing plane is the minimum spacing, the fluid in the inlet section 31 can flow to the outlet section 34. After a single squeeze, the backflow prevention device 14 keeps the peristaltic tube 3 disconnected and continues for a preset time, and the spacing between the working plane and the pressing plane is kept at the minimum spacing and continues for a preset time, so that the fluid in the peristaltic tube 3 between the working matching plate 2 and the backflow prevention device 14 can flow to the outlet of the peristaltic tube 3. The preset spacing is the minimum spacing.

[0075] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A peristaltic pump, characterized in that: include: A working matching plate (2), wherein a working plane is provided on the working matching plate (2); A peristaltic tube (3), the peristaltic tube (3) being used for circulating a fluid, the peristaltic tube (3) being capable of elastic deformation; A peristaltic pressing plate (1), wherein a pressing plane is provided on the peristaltic pressing plate (1), and the peristaltic pressing plate (1) can be moved horizontally so that at least part of the peristaltic tube (3) is located between the pressing plane and the working plane; the peristaltic pressing plate (1) can be raised and lowered so that the pressing plane presses the peristaltic tube (3) toward the side where the working plane is located; A backflow prevention device I (4), wherein the backflow prevention device I (4) and the working matching plate (2) are distributed along the flow direction of the fluid in the peristaltic tube (3) and can selectively connect or disconnect the peristaltic tube (3); The peristaltic tube (3) comprises an inlet section (31), a working section (33) and an outlet section (34) which are sequentially arranged along the fluid flow direction, and the working section (33) is arranged facing the working plane; The inlet section (31) is higher than the working section (33), and the outlet section (34) is not higher than the working section (33); The peristaltic tube (3) is provided with a transition section (32), the two ends of the transition section (32) are respectively connected to the inlet section (31) and the working section (33), and the transition section (32) is arranged obliquely; The peristaltic pump further comprises an inclined support plate (61) for supporting the transition section (32) so that the connection position between the inlet section (31) and the transition section (32) remains in a connected state; The peristaltic pump also includes: A first clamping structure (6) for supporting and fixing the inlet section (31); A second clamping structure (7) for supporting and fixing the outlet section (34); The peristaltic tube (3) further comprises: The backflow prevention device II (5) can selectively connect or disconnect the outlet section (34).

2. The peristaltic pump according to claim 1, characterized in that: The backflow prevention device I (4) and the backflow prevention device II (5) both include: Backflow prevention plate (42); an eccentric roller (41), wherein part of the peristaltic tube (3) is located between the anti-backflow plate (42) and the eccentric roller (41); the eccentric roller (41) can rotate and rise and fall to selectively clamp the peristaltic tube (3) between the anti-backflow plate (42) and the eccentric roller (41) to disconnect the peristaltic tube (3), or separate from the peristaltic tube (3) to connect the peristaltic tube (3); An anti-backflow motor (43), wherein an output shaft of the anti-backflow motor (43) is drivingly connected to the eccentric roller (41) and the output shaft and the eccentric roller (41) are eccentrically arranged, and the anti-backflow motor (43) is used to drive the eccentric roller (41) to rotate and rise and fall.

3. The peristaltic pump according to claim 2, characterized in that: The peristaltic pump also includes: A first support plate (11), wherein the first support plate (11) is provided with a pipe inlet hole for passing the inlet section (31), and the backflow prevention device I (4) is located between the first support plate (11) and the first clamping structure (6).

4. The peristaltic pump according to claim 2, characterized in that: The peristaltic pump also includes: A second support plate (12), wherein the second support plate (12) is provided with a pipe outlet hole for penetrating the outlet section (34), and the backflow prevention device II (5) is located between the second support plate (12) and the second clamping structure (7).

5. The peristaltic pump according to any one of claims 1 to 4, characterized in that: A plurality of peristaltic tubes (3) are provided.

6. A control method for a peristaltic pump according to any one of claims 1 to 4, characterized in that: The following steps are involved: The peristaltic tube (3) is disconnected by means of a backflow prevention device, and the peristaltic pressing plate (1) separated from the peristaltic tube (3) is controlled to move horizontally, so that the length of the pressing plane facing the working plane along the horizontal movement direction of the peristaltic tube (3) is equal to a preset length; When the peristaltic pressing plate (1) is controlled to rise and fall, the peristaltic pressing plate (1) presses the peristaltic tube (3), so that the vertical distance between the working plane and the pressing plane is a preset distance.

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