CN114263595A

CN114263595A - Peristaltic pump

Info

Publication number: CN114263595A
Application number: CN202111635072.XA
Authority: CN
Inventors: 任宏超; 陈堃
Original assignee: Mego Yisheng Biotechnology Beijing Co ltd
Current assignee: Mego Yisheng Biotechnology Beijing Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-01

Abstract

The present invention provides a peristaltic pump comprising: the device comprises a frame, a rocker component, a pressing block, a pump pipe fixing component, a driving motor and a roller component, wherein the driving motor is installed in the frame, the roller component is sleeved on an output shaft of the driving motor, a pump pipe is placed on the roller component, the roller component is used for pushing the pump pipe to supply liquid in a peristaltic manner under the driving of the driving motor, the pump pipe fixing component is fixedly connected to the frame, the pump pipe fixing component is used for fixing two ends of the pump pipe, the rocker component is rotatably arranged on the frame, the pressing block is arranged on the rocker component and is positioned on the roller component, and the rocker component can drive the pressing block to be close to the roller component so as to be matched with the roller component to press the pump pipe on the roller component. The pump pipe fixing assembly fixes two ends of the pump pipe, so that the pump pipe is not easy to move and drop, and the pressing block is tightly attached to the pump pipe to prevent liquid in the pump pipe from flowing back.

Description

Peristaltic pump

Technical Field

The invention relates to the field of pump body equipment, in particular to a peristaltic pump.

Background

Peristaltic pumps are pumps that deliver fluid by alternately squeezing and releasing flexible delivery tubing, and are used in many fields of production and life. The existing peristaltic pump is complex in design structure and low in control precision, and a pump pipe can easily slide along with a pump head when the pump head rotates and can easily fall off sometimes. The clamping structure of the pump head is weak and easy to break. Therefore, the peristaltic pump is designed to solve the problems that a pump pipe of the existing peristaltic pump is easy to slide and fall off and a compression structure is weak.

Disclosure of Invention

In order to overcome the defects in the prior art, the peristaltic pump is provided.

To achieve the above object, in a first aspect, the present application provides a peristaltic pump comprising: the device comprises a frame, a rocker component, a pressing block, a pump pipe fixing component, a driving motor and a roller component, wherein the driving motor is installed in the frame, the roller component is sleeved on an output shaft of the driving motor, a pump pipe is placed on the roller component, the roller component is used for pushing the pump pipe to supply liquid in a peristaltic manner under the driving of the driving motor, the pump pipe fixing component is fixedly connected to the frame, the pump pipe fixing component is used for fixing two ends of the pump pipe, the rocker component is rotatably arranged on the frame, the pressing block is arranged on the rocker component and is positioned on the roller component, and the rocker component can drive the pressing block to be close to the roller component so as to be matched with the roller component to press the pump pipe on the roller component.

With reference to the first aspect, in a possible implementation manner, the roller assembly includes two wheel discs, a plurality of roller shafts and rollers, the two wheel discs are installed on an output shaft of the driving motor in parallel, the plurality of roller shafts are installed between the two wheel discs at equal intervals along a circumferential direction, the rollers are sleeved on the roller shafts correspondingly, and the rollers are used for driving the driving motor to rotate along with the wheel discs so as to push the pump pipe to perform peristaltic liquid supply.

With reference to the first aspect, in a possible implementation manner, a support frame is installed on the outer side of the wheel disc, and the support frame is fixedly connected with the rack through bolts.

With reference to the first aspect, in a possible implementation manner, a second magnetic block is embedded in a side surface of the wheel disc, which is far away from the driving motor, a second hall sensor is arranged at a position, corresponding to the roller assembly, of the side surface of the supporting frame, and the second hall sensor can be matched with the second magnetic block.

With reference to the first aspect, in a possible implementation manner, a pin hole is formed in the pressing block, a guide pin is fittingly connected in the pin hole, the guide pin is fixedly connected with a side wall of the rack, and the pressing block moves along a length direction of the pin hole.

With reference to the first aspect, in a possible implementation manner, the side surface of the compression block close to the pump tube is an arc surface, a protruding rib is arranged on the arc surface of the compression block, the protruding rib is used for reducing the contact area between the compression block and the pump tube, and the compression block is fixedly connected with the rocker assembly through a spring.

With reference to the first aspect, in a possible implementation manner, the pump tube is fixed with a sleeved buckle at both ends, a clamping groove is formed at a position, corresponding to the buckle, of the lower portion of the pump tube fixing assembly, and the buckle can be installed in the corresponding clamping groove in a matched manner.

With reference to the first aspect, in one possible implementation manner, the rocker assembly includes a first connecting rod, a second connecting rod, a first rocker, a second rocker, a third rocker and a handle, the first connecting rod is installed on the compression block in a matching manner, the first rocker is installed on two opposite side surfaces of the first connecting rod, one end of the first rocker is hinged to the side surface of the first connecting rod, the other end of the first rocker is hinged to the corresponding side surface of the rack, the second rocker is installed below the hinged position of the side surface of the first connecting rod corresponding to the first rocker, one end of the second rocker is hinged to the side surface corresponding to the first connecting rod, the other end of the second rocker is rotatably connected to the corresponding side surface of the rack, the two first rockers are connected to the same second connecting rod, and two ends of the second connecting rod are hinged to the middle portions of the side surfaces of the two first rockers respectively, the outer side surfaces of the second connecting rods are hinged with the third rocking rods, and one ends of the third rocking rods are fixedly provided with the handles.

With reference to the first aspect, in a possible implementation manner, a damper is installed at a rotating position of the second rocker and the rack, tension springs are installed between the second rocker and the rack, one end of each tension spring is fixedly connected with the middle of the second rocker, and the other end of each tension spring is fixedly connected with the upper portion of the side wall of the rack.

With reference to the first aspect, in a possible implementation manner, an indicator lamp is installed below the pump tube fixing assembly, and the flashing frequency of the indicator lamp is controlled by a microcontroller to be positively correlated with the liquid supply rate of the pump tube.

The embodiment of the invention has the following advantages:

compared with the prior art, the peristaltic pump provided by the invention has the advantages that the two ends of the pump pipe are fixed through the pump pipe fixing assemblies, so that the pump pipe is not easy to shift and fall off when the rotary roller assemblies pump liquid to the pump pipe in a peristaltic manner, the rocker assemblies control the pressing blocks to be tightly matched and connected with the roller assemblies, the pressing effect on the pump pipe can be better, and the liquid pumping process is stable and reliable.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a schematic of the construction of a peristaltic pump;

FIG. 2 shows a schematic view of the internal structure of the peristaltic pump;

FIG. 3 is a schematic view showing the structure of the peristaltic pump in an open state;

FIG. 4 shows a cross-sectional view of the hold down block and the first link;

description of the main element symbols:

100-a rack, 101-a pump tube, 200-a rocker assembly, 201-a first connecting rod, 202-a second connecting rod, 203-a first rocker, 204-a second rocker, 205-a third rocker, 206-a handle, 207-a tension spring, 208-a damper, 209-a fourth rocker, 300-a pressing block, 301-a convex rib, 302-a pin hole, 303-a guide pin, 304-a spring, 400-a pump tube fixing assembly, 401-a buckle, 402-a clamping groove, 403-an indicator light, 404-a supporting frame, 500-a driving motor, 600-a roller assembly, 601-a wheel disc, 602-a roller, 603-a roller shaft, 701-a first magnetic block, 702-a first Hall sensor, 703-a second magnetic block and 704-a second Hall sensor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1 to 4, the present invention provides a peristaltic pump, which includes a frame 100, a rocker assembly 200, a pressing block 300, a pump tube fixing assembly 400, a driving motor 500, and a roller assembly 600. The driving motor 500 is installed in the frame 100, the output shaft of the driving motor 500 is sleeved with the roller assembly 600, the pump tube 101 is placed on the roller assembly 600, and the roller assembly 600 is used for pushing the pump tube 101 to wriggle for liquid supply under the driving of the driving motor 500. The pump tube fixing assembly 400 is fixedly connected to the frame 100, the rocker assembly 200 is rotatably arranged on the frame 100, the pressing block 300 is arranged on the rocker assembly 200, the pressing block 300 is positioned above the roller assembly 600, and the rocker assembly 200 can drive the pressing block 300 to be close to the roller assembly 600 so as to be matched with the roller assembly 600 to press the pump tube 101 on the roller assembly 600.

Referring to fig. 1 and 2, a driving motor 500 is installed between two side walls of the frame 100, the driving motor 500 is fixedly connected with the frame 100 through screws, a roller assembly 600 is fixedly sleeved on an output shaft of the driving motor 500, and the roller assembly 600 includes two wheel discs 601, a plurality of roller shafts 603 and rollers 602. The roller 602 is driven by the driving motor 500 to rotate with the wheel disc 601 to push the pump tube 101 to peristaltically supply liquid.

In this embodiment, five roller shafts 603 are equidistantly installed between two parallel wheel discs 601 along the circumferential direction, the rollers 602 are sleeved on the roller shafts 603, and the pump pipe 101 can be rolled and extruded on the side surfaces of the rollers 602. The supporting frame 404 is installed on the outer side of the wheel disc 601 far away from the driving motor 500, the supporting frame 404 is fixedly connected with the machine frame 100 through bolts, and the supporting frame 404 can support the roller assembly 600.

With continued reference to fig. 1 and 2, the rocker assembly 200 includes a first rocker 203, a first link 201, a second rocker 204, a second link 202, a third rocker 205, and a handle 206. Two opposite side surfaces of the first connecting rod 201 are respectively provided with a first rocker 203, one end of the first rocker 203 is hinged with the side surface of the first connecting rod 201, and the other end of the first rocker 203 is hinged with the corresponding side surface of the rack 100. The side of the first connecting rod 201 is provided with a second rocker 204 below the hinged part of the first rocker 203, one end of the second rocker 204 is hinged with the side of the first connecting rod 201, the other end of the second rocker 204 is rotatably connected with the corresponding side of the rack 100, and the rotating parts of the second rocker 204 and the rack 100 are provided with dampers 208. Tension springs 207 are arranged between the second rocking bars 204 and the rack 100, one ends of the tension springs 207 are fixedly connected with the middle of the second rocking bars 204, and the other ends of the tension springs 207 are fixedly connected with the upper portion of the side face of the rack 100. The two first rocking bars 203 are connected with the same second connecting rod 202, and two ends of the second connecting rod 202 are respectively hinged with the middle parts of the outer side surfaces of the two first rocking bars 203.

In this embodiment, when the second rocking bar 204 rotates downward near one end of the first connecting rod 201, the tension spring 207 is extended, so that the rotation process of the first connecting rod 201 and the second rocking bar 204 can be more stable to some extent, and the damper 208 can also make the rotation process of the device more smooth and reliable. When the second rocker 204 rotates reversely, the second rocker 204 can be pulled to rotate by the elastic force of the elongated tension spring 207 recovering the deformation, which plays a role in assisting to punch through the dead point position.

Referring to fig. 1 and 2, a third rocker 205 and a fourth rocker 209 are respectively mounted on two opposite outer side surfaces of the second connecting rod 202, the third rocker 205 includes two lever arms, the fourth rocker 209 includes three lever arms, and one ends of the lever arms of the third rocker 205 and the fourth rocker 209 are overlapped with each other, and the other ends are away from each other. The first lever arm of the third rocker 205 and the fourth rocker 209 is hinged with the side of the second connecting rod 202 on the same side, the end of the second lever arm is provided with the same handle 206, and the end of the third lever arm of the fourth rocker 209, which is positioned inside the machine frame 100, is embedded with the first magnetic block 701.

In this embodiment, the third rocker 205 and the fourth rocker 209 can rotate around a hinge point with the frame 100, an end of a common lever arm of the third rocker 205 and the fourth rocker 209 is fixedly connected with a handle 206, the handle 206 is toggled to enable the third rocker 205 and the fourth rocker 209 to rotate around the hinge point with the frame 100, and rotation of another common lever arm of the third rocker 205 and the fourth rocker 209 can drive the second connecting rod 202 and the first rocker 203 to rotate. The first hall sensor 702 is installed on the inner wall of the rack 100, and along with the rotation of the handle 206, the first magnetic block 701 can be close to or far away from the first hall sensor 702 for detecting whether the handle 206 rotates to a preset position.

Referring to fig. 4, a pressing block 300 is installed in the first link 201, a pin hole 302 is formed in the pressing block 300, a guide pin 303 is fittingly connected in the pin hole 302, the guide pin 303 is fixedly connected with a side wall of the rack 100, and the pressing block 300 can move in a vertical direction relative to the guide pin 303. The middle part of the top surface of the first connecting rod 201 is of an upward protruding structure, a spring 304 is mounted on the top surface of the pressing block 300, one end of the spring 304 is fixedly connected with the top surface of the pressing block 300, and the other end of the spring 304 is fixedly connected with the inner top surface of the protruding part of the first connecting rod 201. The pump tube 101 is located between the pressing block 300 and the roller 602, the handle 206 can be rotated to different positions to enable the pressing block 300 and the pump tube 101 to have different matching relations, and the rotating handle 206 can control the pressing block 300 and the pump tube 101 to be away from, contacted, pressed and locked.

In the embodiment, the spring 304 is arranged to ensure that the spring 304 resists the compression elastic force when the first link 201 pushes the pressing block 300 to press the pump tube 101, so that the pump tube 101 is stressed more stably and uniformly. Set up protruding muscle 301 on the cambered surface of compact heap 300 and the contact of pump line 101, protruding muscle 301 is perpendicular for the antarafacial with the position relation of pump line 101, when compact heap 300 compresses tightly pump line 101 gradually, can reduce the area of contact of compact heap 300 and pump line 101 through protruding muscle 301, the liquid flow of control peristaltic pump that can not only be more accurate, can also the effective control liquid backward flow.

In this embodiment, a limit pin is fixedly installed on an outer wall of the driving motor 500 close to the first link 201, and a position of the first link 201 corresponding to the limit pin is stepped. When the first connecting rod 201 pushes the pressing block 300 to move towards the pump pipe 101 and completely supports against the pump pipe 101, the limiting pin supports against the stepped structure of the first connecting rod 201, and at the moment, the limiting pin can limit the pressing block 300 to continue to extrude the pump pipe 101, so that the pump pipe 101, the roller 602 and other components are prevented from being damaged due to compression.

Referring to fig. 2 and 3, the pump tube fixing assembly 400 is installed outside the supporting frame 404, the bottom of the pump tube fixing assembly 400 is fixedly connected with the bottom of the frame 100, and the supporting frame 404 and the roller assembly 600 can be covered inside the pump tube fixing assembly 400 and the frame 100. The pump pipe 101 is installed on the pump pipe fixing assembly 400 and the roller assembly 600, the upper portion of the pump pipe 101 is attached to the roller 602, and the lower portion of the pump pipe 101 is connected with the pump pipe fixing assembly 400 in a matching manner. The compressing block 300 is located above the pump tube fixing assembly 400, and the compressing block 300 can move up and down in the vertical direction above the pump tube fixing assembly 400. When the pressing block 300 moves downwards and gradually approaches to the roller 602, not only can the upper part of the pump tube 101 be fixed between the pressing block 300 and the roller assembly 600, but also the pressing block 300 can be matched with the roller 602 to realize liquid separation operation on the pump tube 101, and when the pressing block 300 is far away from the pump tube fixing assembly 400, the pump tube 101 can be conveniently taken down from the pump tube fixing assembly 400.

In this embodiment, the pressing block 300 is connected to the frame 100 through the rocker assembly 200 in a fitting manner, and the inner side surface of the pressing block 300 close to the pump tube 101 is an arc surface. When the pressing block 300 moves up and down under the action of the rocker assembly 200, the radian of the side surface of the pressing block 300 contacted with the pump pipe 101 is consistent with that of the pump pipe 101, so that the inner side surface of the pressing block 300 can be better attached to the pump pipe 101 wound on the roller 602.

In the present embodiment, when the pump tube 101 needs to be installed and fixed, the compressing block 300 and the pump tube fixing assembly 400 are in an open state. The pump pipe 101 is placed on the pump pipe fixing assembly 400 firstly, so that the upper part of the pump pipe 101 is ensured to be in contact with the roller assembly 600, and the lower part of the pump pipe 101 is clamped and fixed in the clamping groove 402 through the buckle 401. Then the handle 206 is pulled downwards, at this time, the rack 100, the second rocking bar 204, the first connecting rod 201 and the first rocking bar 203 form a double-rocking-bar mechanism, the first connecting rod 201 moves towards the pump tube 101 until the limiting pin limits the first connecting rod 201 and the pressing block 300 to continue moving, and therefore the first rocking bar 203, the second rocking bar 204 and the first connecting rod 201 cannot continue moving. Then, the handle 206 is pulled downwards continuously, the handle 206 drives the third rocker 205 to rotate, and at this time, the rack 100, the first rocker 203, the third rocker 205 and the second connecting rod 202 form a double-rocker mechanism. When the handle 206 is pulled continuously, the frame 100 and the first rocking bar 203 are not moved, the fixing points of the second connecting rod 202 and the third rocking bar 205 are in a straight line, i.e. move to a fixed point position, and at this time, the pressing block 300 abuts against the roller assembly 600 to fix the pump tube 101 between the pressing block 300 and the roller 602.

Referring to fig. 3, the ends of the pump tube 101 near the two ends are fixed with the fasteners 401, the lower portion of the pump tube fixing assembly 400 corresponding to the fasteners 401 is provided with the slots 402, and the fasteners 401 can be installed in the corresponding slots 402.

In this embodiment, after the upper portion of the pump tube 101 is fixed to the top of the roller assembly 600 by the pressing block 300, the fastener 401 at the lower portion of the pump tube 101 is fastened in the corresponding fastening slot 402. Because both ends of the pump tube 101 are fixed by the buckles 401, the positions of the pump tube 101 on the roller assembly 600 cannot be changed by the forward rotation and the reverse rotation of the roller assembly 600, and the pump tube 101 is prevented from moving when the roller 602 rotates. A clamping feedback-stress strain sensor is arranged at the position of the clamp 401, so that the clamping state of the pump pipe 101 can be monitored in real time, and the situation that the flow control at the position of the pump pipe 101 is not accurate due to the fact that the position of the pump pipe 101 is changed and found out untimely is avoided.

In this embodiment, the second magnetic block 703 is embedded in the side of the wheel disc 601 away from the driving motor 500, the second hall sensor 704 is disposed at the side of the supporting frame 404 corresponding to the position of the roller assembly 600, the second magnetic block 703 is matched with the second hall sensor 704, and when the driving motor 500 controls the roller assembly 600 to rotate, the second hall sensor 704 is used to detect the rotation frequency of the second magnetic block 703, that is, the second hall sensor 704 is used to detect the rotation speed of the roller 602, so as to accurately control the liquid flow.

Example two

Referring to fig. 3, the present embodiment provides a peristaltic pump. The present embodiment is an improvement based on the technology of the first embodiment, and the difference between the present embodiment and the first embodiment is that an indicator lamp 403 is installed at the lower part of the pump tube fixing assembly 400, the flashing frequency of the indicator lamp 403 is controlled by a microcontroller, and the flashing frequency of the indicator lamp 403 is related to the liquid supply rate of the pump tube 101.

In this embodiment, three indicator lights 403 are uniformly embedded along a ring shape on the outer side surface of the lower portion of the pump tube fixing assembly 400, and the indicator lights 403 are electrically connected to the microcontroller. The flicker frequency of the indicator light 403 is adjusted to be consistent with or in direct proportion to the liquid supply rate of the pump tube 101 caused by the rotation of the roller assembly 600, that is, the faster the flicker of the indicator light 403 is, the faster the liquid supply speed of the pump tube 101 is, and an operator can intuitively judge the liquid supply condition of the pump tube 101 by observing the display state of the indicator light 403, so that the liquid supply process is more accurate and reliable.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A peristaltic pump, comprising: the device comprises a frame, a rocker component, a pressing block, a pump pipe fixing component, a driving motor and a roller component, wherein the driving motor is installed in the frame, the roller component is sleeved on an output shaft of the driving motor, a pump pipe is placed on the roller component, the roller component is used for pushing the pump pipe to supply liquid in a peristaltic manner under the driving of the driving motor, the pump pipe fixing component is fixedly connected to the frame, the pump pipe fixing component is used for fixing two ends of the pump pipe, the rocker component is rotatably arranged on the frame, the pressing block is arranged on the rocker component and is positioned on the roller component, and the rocker component can drive the pressing block to be close to the roller component so as to be matched with the roller component to press the pump pipe on the roller component.

2. The peristaltic pump according to claim 1, wherein the roller assembly includes two wheel discs, a plurality of roller shafts and rollers, the two wheel discs are mounted on an output shaft of the driving motor in parallel, the plurality of roller shafts are mounted between the two wheel discs at equal intervals along a circumferential direction, the corresponding rollers are sleeved on the roller shafts, and the rollers are driven by the driving motor to rotate along with the wheel discs to push the pump tube to perform peristaltic liquid supply.

3. The peristaltic pump of claim 2, wherein a support frame is mounted to an outer side of the wheel disc, and the support frame is fixedly connected to the frame through bolts.

4. The peristaltic pump as claimed in claim 3, wherein a second magnetic block is fixedly embedded in the side of the wheel disc far away from the driving motor, a second Hall sensor is arranged on the side of the supporting frame corresponding to the position of the roller assembly, and the second Hall sensor can be matched with the second magnetic block.

5. The peristaltic pump of claim 1, wherein the compression block is provided with a pin hole, a guide pin is fittingly connected in the pin hole, the guide pin is fixedly connected with the side wall of the frame, and the compression block moves along the length direction of the pin hole.

6. The peristaltic pump of claim 5, wherein the side of the compression block close to the pump tube is an arc surface, the arc surface of the compression block is provided with a raised rib, the raised rib is used for reducing the contact area between the compression block and the pump tube, and the compression block is fixedly connected with the rocker assembly through a spring.

7. The peristaltic pump of claim 1, wherein the pump tube is fixedly sleeved with buckles near both ends, and the lower portion of the pump tube fixing component corresponding to the buckles is provided with clamping grooves, and the buckles are fittingly installed in the corresponding clamping grooves.

8. The peristaltic pump of claim 1, wherein the rocker assembly comprises a first connecting rod, a second connecting rod, a first rocker, a second rocker, a third rocker and a handle, the first connecting rod is mounted on the compression block in a matching manner, the first rocker is mounted on each of two opposite side surfaces of the first connecting rod, one end of the first rocker is hinged to one side surface of the first connecting rod, the other end of the first rocker is hinged to the corresponding side surface of the frame, the second rocker is mounted on each side surface of the first connecting rod below the hinged position of the first rocker, one end of the second rocker is hinged to the corresponding side surface of the first connecting rod, the other end of the second rocker is rotatably connected to the corresponding side surface of the frame, the two first rockers are connected with the same second connecting rod, and the two ends of the second connecting rod are hinged to the middle parts of the side surfaces of the two first rockers respectively, the outer side surfaces of the second connecting rods are hinged with the third rocking rods, and one ends of the third rocking rods are fixedly provided with the handles.

9. The peristaltic pump of claim 8, wherein a damper is mounted at a rotating position of the second rocker and the frame, tension springs are mounted between the second rocker and the frame, one end of each tension spring is fixedly connected with the middle of the second rocker, and the other end of each tension spring is fixedly connected with the upper portion of the side wall of the frame.

10. The peristaltic pump of claim 1, wherein an indicator lamp is mounted below the pump tube fixing assembly, and the flashing frequency of the indicator lamp is positively correlated with the liquid supply rate of the pump tube through the control of a microcontroller.