CN111412128B

CN111412128B - Linear peristaltic pump

Info

Publication number: CN111412128B
Application number: CN202010208648.3A
Authority: CN
Inventors: 胡庆磊; 黄凯; 李宁; 李梦婷; 饶建新
Original assignee: Xiaophoton Wuhan Technology Co ltd
Current assignee: Xiaophoton Wuhan Technology Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2024-06-04
Anticipated expiration: 2040-03-23
Also published as: CN111412128A

Abstract

The invention relates to a linear peristaltic pump, which comprises a pump shell, a tube pressing device and a driving device, wherein a hose penetrates through the pump shell, the tube pressing device is arranged in the pump shell, and the driving device drives the tube pressing device; the pipe pressing device and the axial direction of the hose form a first set included angle; the driving device drives the pipe pressing device to press and release the hose in the radial direction of the hose. The linear peristaltic pump has the advantages of simple structure, good practicability, low cost and convenience for wide popularization and application.

Description

Linear peristaltic pump

Technical Field

The present invention relates to peristaltic pumps, and more particularly to a linear peristaltic pump.

Background

In the prior art, peristaltic pumps are a new type of liquid delivery pump. Compared with the traditional rotor pump, diaphragm pump and centrifugal pump, the peristaltic pump does not need to be in direct contact with liquid to cause pollution, has the characteristics of high precision, small volume and the like, and is widely popularized and applied in various industries such as medical treatment, medicine, food, beverage, chemical industry, smelting and the like. However, the existing peristaltic pump still has some defects, such as short service life, large volume, low precision, high cost, inconvenient disassembly and assembly and the like, and cannot meet market demands.

The existing peristaltic pump generally adopts two structural forms of a rotary peristaltic pump and a linear peristaltic pump. A rotary, fast-assembling peristaltic pump is disclosed, as is published in CN 201821720567.6. The roller set is driven to rotate by the motor, so that the pipeline is extruded continuously, and liquid is conveyed. The roller groups with two groups of different rotation diameters are designed, so that after the hose works for a long time and is worn, the roller groups with small diameters can be directly replaced, the replacement can be facilitated, and the service life is prolonged. However, this solution still has the problems of large volume and low precision. In this scheme, adopt the frictional force between motor shaft and the wheelset to drive the wheelset rotatory to extrude the pipeline, but when motor shaft and wheelset transmission moment of torsion, skid easily, lead to the pump liquid unstable, the precision is not enough greatly. Further, as disclosed in the publication No. CN201621359731.6, a peristaltic pump is disclosed which is easy to assemble and disassemble. The scheme adopts a rotary structure, and the rollers are driven by the driver to squeeze the pipeline to convey liquid. In this scheme, install the hose on the card subassembly, when needing to change the hose, can be through rotating card subassembly quick assembly disassembly hose, this peristaltic pump simple structure, with low costs, dismouting are convenient. However, this design still has the problem that the driver is easy to slip when driving the wheel to rotate, resulting in low accuracy.

Publication number CN201821612866.8 discloses a linear peristaltic pump roller drive. In the scheme, the linear motor is adopted as the guide component to drive the idler wheels, so that the synchronism is good, the transmission precision is high, and the problem of poor liquid pumping precision can be solved. However, the design scheme has the problems of high cost and inconvenience in disassembly, assembly and replacement of the pipeline. The scheme is realized by selecting high-precision elements such as a linear motor and a screw rod, and the machining and assembling precision of the whole scheme is also required to be high, so that the whole cost is very high, and the pipeline cannot be quickly and conveniently assembled, disassembled and replaced, so that the pipeline cannot be widely popularized and applied. Further, as disclosed in publication No. CN201720890433.8, a peristaltic pump is disclosed which reciprocates linearly. The scheme adopts the curve of the cam mechanism to control the lifting motion of the hose component and the cover plate component and the pipe clamping motion of the backflow preventing device, and the pipe pressing roller pumps liquid. The design scheme has low cost and stable transmission. However, the problems of short service life, large volume and low liquid pumping precision still exist.

Therefore, how to design a peristaltic pump with long service life, high precision, low cost and convenient disassembly and assembly is a technical problem that the skilled person needs to solve at present.

Disclosure of Invention

The invention aims to solve the technical problem of providing an improved linear peristaltic pump.

The technical scheme adopted for solving the technical problems is as follows: a linear peristaltic pump is constructed, and the peristaltic pump comprises a pump shell for a hose to pass through, a tube pressing device arranged in the pump shell, and a driving device for driving the tube pressing device; the pipe pressing device and the axial direction of the hose form a first set included angle; the driving device drives the pipe pressing device to press and release the hose in the radial direction of the hose.

Preferably, the tube pressing device includes a pressing piece obliquely provided in the pump housing and at the first set angle with respect to the axial direction of the hose to reciprocally press and release the hose in the radial direction of the hose.

Preferably, the compression sheet is an elastic compression sheet.

Preferably, the pipe pressing device further comprises a lifting mechanism, and the lifting mechanism is connected with the driving device and the pressing piece and driven by the driving device to drive the pressing piece to reciprocally press and release the hose.

Preferably, the lifting mechanism comprises a crank sliding block component which is arranged in the pump shell and can swing back and forth within a second set angle so as to drive the pressing sheet to press and release the hose;

the crank sliding block assembly comprises a crank, a sliding block and a connecting rod, wherein one end of the crank is connected with the driving device, and the sliding block is arranged at the other end of the crank, is connected with the crank and the pressing sheet and can slide towards the direction of the hose;

The driving device comprises a driving motor capable of rotating positively and negatively.

Preferably, the driving device comprises an electromagnet mechanism which generates electromagnetic induction with the pipe pressing device in an electrified state to drive the pipe pressing device to press the hose in the radial direction of the hose;

The lifting mechanism comprises a sliding block which is driven by the electromagnet mechanism to reciprocate radially towards the hose through electromagnetic induction.

Preferably, the linear peristaltic pump further comprises a guide assembly to move the tube pressing device;

The guide assembly includes a guide groove provided at an inner side wall of the pump housing and extending radially toward the hose to guide the slider.

Preferably, the linear peristaltic pump further comprises a non-return means provided on the hose to prevent backflow of fluid;

the non-return means comprise a one-way valve or a pinch valve.

Preferably, the linear peristaltic pump further comprises two fixing pipe clamps separately arranged at two ends of the pump housing to fix the hose.

Preferably, the plurality of hoses are arranged in the pump shell side by side; the driving device and the pipe pressing device are multiple and are arranged corresponding to the hose;

or the number of the hoses is one, the number of the driving devices and the number of the pipe pressing devices are multiple, and the driving devices and the pipe pressing devices are arranged in one-to-one correspondence and can be driven alternatively; the plurality of pipe pressing devices are arranged on the hose at intervals.

The linear peristaltic pump has the following beneficial effects: the linear peristaltic pump drives the tube pressing device arranged in the pump shell and forming a first set included angle with the axial direction of the hose through the driving device to perform reciprocating motion of extruding or loosening the hose in the radial direction of the hose, so that liquid in the hose can be pumped out, stable liquid conveying is realized, pulse generation during liquid pumping is reduced, stable liquid conveying is ensured, liquid pumping precision is improved, in addition, the tube pressing device reciprocates in the radial direction of the hose, contact area and contact duration with the hose are reduced, abrasion of the hose is not easy to cause, and the service life of the peristaltic pump is ensured. The linear peristaltic pump has the characteristics of long service life, small volume, high precision, low cost and convenient disassembly and assembly.

In addition, the preforming of this press pipe device can be driven by this elevating system and do circulation elevating system and move, extrudes the hose and realizes the transport of liquid, can reduce peristaltic pump's volume greatly through this elevating system, has guaranteed the miniaturization of sharp peristaltic pump, simultaneously for this sharp peristaltic pump simple structure, practicality are good, with low costs, are convenient for extensively popularize and use.

The lifting mechanism which is circularly lifted drives the pressing sheet to squeeze the hose, so that the hose and the pressing pipe device cannot slip when the driving device drives the pressing pipe device to pump liquid, the precision of the peristaltic pump is improved, meanwhile, the pressing pipe device and the hose do not need to pump liquid through friction, and the pressing pipe device cannot squeeze the hose when the peristaltic pump does not work, so that the abrasion of the hose is reduced, and the service life of the peristaltic pump is prolonged.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a first embodiment of a linear peristaltic pump of the present invention;

FIG. 2 is a schematic diagram of a second embodiment of the linear peristaltic pump of the present invention;

FIG. 3 is a schematic view of a third embodiment of a linear peristaltic pump of the present invention;

FIG. 4 is a schematic view of a fourth embodiment of a linear peristaltic pump of the present invention;

FIG. 5 is a schematic view of a fifth embodiment of a linear peristaltic pump of the present invention;

Wherein the pump housing 10; a pump body 11; a pump cover 12; a hose 20; a driving device 30; a tube pressing device 40; tabletting 41; crank block assembly 42; crank 421; a slider 422; a guide assembly 50; a non-return device 60; securing the pipe strap 70.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.

Fig. 1 shows a first embodiment of the linear peristaltic pump of the present invention. The linear peristaltic pump can be a purely mechanical device or an electromechanical combination device, can be used for pumping out liquid, can be designed as microminiature as required and can ensure a usable stroke. The linear peristaltic pump has the characteristics of long service life, small volume, high precision, low cost and convenient disassembly and assembly.

Further, as shown in fig. 1, in this embodiment, the linear peristaltic pump may include a pump housing 10, a drive device 30, and a tube pressing device 40. The pump housing 10 may be configured for the hose 20 to be inserted therethrough, and the hose 20 may be disposed in a straight line within the pump housing 10. The driving device 30 may be disposed in the pump housing 10, and may drive the pipe pressing device 40 to press the hose 20. It will be appreciated that in other embodiments, the drive means 30 is not limited to being disposed within the pump housing 10, but may be disposed outside of the pump housing 10. The pipe pressing device 40 may be disposed in the pump housing 10 and may be disposed at a first set angle with respect to the axial direction of the hose 20, and may be driven by the driving device 30 to perform a reciprocating motion of pressing and releasing the hose 20 in the radial direction of the hose 20. In this embodiment, the hose 20 may be one, the driving device 30 and the pipe pressing device 40 may be a group, and the driving device 30 and the pipe pressing device 40 are correspondingly disposed.

Further, in the present embodiment, the pump housing 10 may include a pump body 11 and a pump cover 12. The pump body 11 may be hollow, and may have a cavity formed therein, and an opening may be formed in the top of the pump body 11, and the opening may allow each component to be mounted in the cavity. Through holes can be arranged on the side walls of the pump body 11 which are oppositely arranged, and the through holes can be penetrated by the hose 20. A hose mounting groove may be provided inside the pump body 11 for mounting the hose, and the hose mounting groove may be provided at the bottom wall of the pump body 11. It will be appreciated that in other embodiments, the hose mounting groove may be omitted. The pump cover 12 is disposed on the pump body 11, and is detachably disposed with the pump body 11, and can cover the opening.

Further, in this embodiment, the hose 20 may be used to convey liquids, gases, and solid-liquid mixtures, and the materials used may be one or more of silicone rubber, polytetrafluoroethylene, and synthetic materials. Different materials have different properties, can meet different use occasions, and are convenient for wider popularization and use.

Further, in the present embodiment, the driving device 30 may be a rotation driving device. Specifically, the tube pressing device can be a driving motor capable of rotating forward and backward, can be used for driving the tube pressing device 40 to reciprocate, has a simple driving method and is easy to operate, can be used in more occasions, and can be matched with the tube pressing device 40 to realize the high-precision requirement of the peristaltic pump. It will be appreciated that in other embodiments the drive is not limited to a rotary drive, it may be a linear drive, such as a hydraulic drive, an electric drive, in particular it may be a cylinder, or an electric drive formed by a gear, a motor and a rack. The drive motor may be mounted in the pump body 11 of the pump housing 10, although it will be appreciated that in other embodiments it may be mounted on the outside of the pump housing 10 and its output shaft may pass into the pump body 11 from the outside of the pump housing 10.

Further, in the present embodiment, the tube pressing device 40 may include a pressing piece 41 and a lifting mechanism. The pressing piece 41 may be disposed in the pump housing 10 at an inclination to the axial direction of the hose 20 at a first set angle, which may reciprocally press and release the hose 20 in the radial direction of the hose 20. It should be noted that, this first angle of setting can be the acute angle, through adopting inclined structural design, can be convenient for steady extrusion go out the liquid in the hose, at extrusion hose in-process, can effectively reduce the contact duration and area of contact with the pipe pressing device 40, guaranteed peristaltic pump life, and can increase pump liquid efficiency. In this embodiment, the pressing piece 41 is an elastic pressing piece, and in particular, the pressing piece 41 may be a spring pressing piece. Of course, it will be appreciated that in other embodiments, the tab 41 is not limited to a spring tab, and may be an alloy tab, a plastic tab, a rubber tab, or the like. It will be appreciated that a protective sleeve, such as a silicone protective sleeve, a plastic protective sleeve, etc., may also be provided where the compression sheet 41 contacts the hose 20 to avoid unnecessary wear of the hose 20 by the compression sheet 41.

The lifting mechanism can be arranged in the pump shell 10 and can be connected with the driving device 30 and the pressing piece 41, and can be driven by the driving device 30 to lift and lower back and forth along the radial direction of the hose 20, so that the pressing piece 41 can be driven to lift and lower back and forth to squeeze and release the hose 20.

Further, in this embodiment, the lifting mechanism may be a crank block assembly 42; of course, it will be appreciated that in other embodiments, the lifting mechanism may not be limited to the crank block assembly 4242, which may be a slider mechanism, cam mechanism, gear mechanism, ratchet mechanism, or the like. The lifting mechanism has the characteristics of small volume, simple principle and easy realization. In this embodiment, the crank block assembly 42 can be disposed in the pump housing 10, and can swing reciprocally within a second set angle, so as to drive the pressing piece 41 to press and release the hose 20. In some embodiments, the crank block assembly 42 may include a crank 421 and a block 422. One end of the crank 421 may be connected to the driving device 30, and the other end may be connected to the slider 422. Specifically, the crank 421 may include a first rod and a second rod rotatably connected to the first rod; the first rod body can be connected with the driving motor, and can be driven by the driving motor to reciprocally rotate within a second set angle, so that the second rod body can be driven to reciprocally rotate. The second rod body may be rotatably connected to the slider 422, and may drive the slider 422 to reciprocate along the radial direction of the hose 20. It should be noted that the second setting angle may be an obtuse angle. The sliding block 422 is slidably disposed and can be fixedly connected to one end of the pressing piece 41, and can slide along a direction perpendicular to the hose 20, so as to drive the pressing piece to press or release the hose 20 along the direction of the hose 20.

Further, in the present embodiment, the linear peristaltic pump may further include a guide assembly 50, and the guide assembly 50 may be disposed in the pump housing 10, and in particular, in some embodiments, the guide assembly 50 may be mounted to an inner sidewall of the pump housing 10, which may guide the movement of the tube pressing device 40. Specifically, in the present embodiment, the guide assembly 50 may be a guide groove. The guide groove may be provided on the inner side wall of the pump housing 10 and may be provided to extend radially of the hose 20, which may be provided for sliding the slider 422 therein, thereby guiding the slider 422. It will be appreciated that in other embodiments, the guide assembly 50 may not be limited to a guide slot, and may be a guide rail, and the slider 422 may be sleeved on the guide rail to slide.

Further, in this embodiment, the linear peristaltic pump may further include a check device 60. The non-return means may be provided on the hose 20, which may be located downstream of the compression plate 41, which may be used to prevent backflow of fluid. In this embodiment, the check device 60 may be a one-way valve. It will be appreciated that in other embodiments, the check device 60 may not be limited to a one-way valve, which may be a pinch valve or other device. By arranging the non-return device 60, the liquid can flow from one direction only, no backflow can be caused, the generation of pulses is reduced, and the stability of the liquid flow is ensured.

Further, in this embodiment, the linear peristaltic pump may further include a stationary tube clamp 70. The two fixing pipe clamps 70 may be respectively disposed at two ends of the pump housing 10, and they may be clamped on the hose 20 and detachably connected to the hose 20, so as to effectively fix the hose 20 and facilitate replacement of the hose 20. When in installation, the hose 20 can be inserted into the pump shell 10 from the through hole at one end of the pump shell 10 and can be inserted out from the through hole at the other end of the pump shell 10, and the two fixing pipe clamps 70 are respectively arranged at two ends of the pump shell 10, are positioned at the outer side of the pump shell 10 and are clamped on the hose 20.

When the linear peristaltic pump of this embodiment is used, the hose 20 passes through the through holes on two sides of the pump body 11, passes through the hose mounting groove in the pump body 11, and is connected with the one-way valve; the fixing pipe clamps 70 are disposed at two ends of the pump housing 10, and are located outside the pump housing 10 and clamped on the hose 20. The pressing sheet 41 is fixed with the slide block 422 of the crank slide block assembly 42, the slide block 422 is arranged in the guide groove, one end of a crank of the crank slide block assembly 42 is fixedly connected to a rotating shaft of the driving motor, and the driving motor drives the crank slide block assembly to rotate. The pump cover 12 is then fastened to the pump body 11 by means of screws.

The driving motor rotates positively, and the crank of the crank slider assembly 42 drives the rotation of the driving motor, so that the slider is driven to reciprocate along the guide groove, and the pressing sheet 41 is driven to extrude the hose 20 along the radial direction, and as the pressing sheet 41 adopts an inclined structural design, the right side of the pressing sheet 41 firstly contacts with the hose 20, and the pressing sheet 41 sequentially pressurizes the hose 20 along the radial direction from right to left in the process of continuously moving the pressing sheet 41 downwards until the pressing sheet 41 completely contacts with the hose 20 and extrudes. The liquid flows from right to left to the one-way valve during squeezing. The driving motor rotates reversely, and of course, the driving motor can also rotate continuously, the pressing piece 41 moves upwards along the guide groove along with the sliding block 422 to leave the hose 20, negative pressure is caused to the hose 20 which is just extruded, and the left side of the hose 20 is provided with the one-way valve which only allows gas and liquid to flow from right to left, so that the liquid on the right side of the hose 20 can be refilled to the left in the place which is just extruded. The pressing sheet 41 reciprocates up and down under the driving of the crank block assembly 42, and repeatedly presses the hose 20, so that the liquid flows from right to left in sequence. When the rotation speed of the driving motor reaches a certain value, the pressing sheet 41 can rapidly extrude the hose 20 under the drive of the crank block assembly 42, so that the liquid flow is very stable, the generation of pulses is greatly reduced, and the stability of the peristaltic pump is ensured. Meanwhile, the crank block component 42 has quick return characteristic, when the rotating speed of the driving motor is fixed, the upward moving speed of the pressing sheet 41 is higher than the downward moving speed, so that the hose 20 can be filled with enough liquid after being extruded, the continuity of the peristaltic pump in pumping liquid is ensured, and meanwhile, the requirement on the peristaltic pump precision under the extrusion of the pressing sheet 41 is met. The crank block component 42 with simple working principle and strong practicability can not only meet the requirements, but also realize miniaturization, so that the peristaltic pump is greatly reduced in size and low in cost.

When pumping liquid, the preforming 41 only can carry out steady extrusion to a minor segment of hose 20, is difficult to cause wearing and tearing to hose 20, simultaneously, under the circumstances that peristaltic pump is inoperative, preforming 41 can not compress hose 20, has improved peristaltic pump's life greatly. The hose 20 is fixed by the fixed pipe clamps 70, when the hose 20 needs to be replaced, the hose 20 is directly drawn out for replacement only by taking down the fixed pipe clamps 70 on the two sides of the pump body 11, and the operation is simple, so that the pipe can be conveniently disassembled and replaced.

In conclusion, the linear peristaltic pump not only improves the precision and stability of the peristaltic pump in pumping liquid, but also ensures the advantages of long service life, low cost, convenient disassembly and assembly and suitability for various occasions.

Fig. 2 shows a second embodiment of the linear peristaltic pump of the present invention. It differs from the first embodiment in that the drive means may comprise an electromagnet mechanism, not limited to a drive motor. The electromagnet mechanism may be disposed on an inner side wall of the pump housing 10, and may generate electromagnetic induction with the pipe pressing device 40 in an energized state to drive the pipe pressing device 40 to press the hose 20 in a radial direction of the hose 20. The electromagnet mechanism may include an electromagnet, which may be connected to an external power source, which may be disposed at one side of the guide groove and at an upper portion of the pump body 11. The lifting mechanism may only include a slider 422, where one end of the slider 422 may be disposed in the guide groove, and the other end of the slider 422 may pass through the side wall of the guide groove, and the other end of the slider passing through the guide groove may be connected with the electromagnet mechanism through electromagnetic induction, and the slider 422 may be driven by the electromagnet mechanism through battery induction to reciprocate radially towards the hose 20. In this embodiment, the check device 60 may employ a pinch valve, not limited to a one-way valve.

When the pressing piece 41 is used, the pressing piece 41 can be fixed on the sliding block 422, the electromagnet of the electromagnet mechanism is electrified to generate electromagnetic force, under the action of the electromagnetic force, the sliding block 422 moves downwards along the guide groove along with the pressing piece 41 until the hose 20 is completely extruded by the pressing piece 41, after the liquid is pumped out from right to left, the electromagnet mechanism is closed, the electromagnetic force is eliminated, the electromagnet mechanism is reset, and the pressing piece 41 and the sliding block 422 move upwards along the sliding groove 12 under the elastic force of the pressing piece 41 until the pressing piece 41 is restored to an initial state. The negative pressure generated after the hose 20 is squeezed is filled with the liquid on the right side of the hose 20 in time. The repeated operation of the electromagnet mechanism makes the pressing sheet 41 repeatedly move up and down in a straight line under the drive of the sliding block 422 and repeatedly squeeze the hose 20, so that the continuous pumping of the peristaltic pump is realized. The designed electromagnet mechanism 22 can realize the circular lifting movement of the peristaltic pump under the extremely small volume, greatly reduces the volume of the peristaltic pump and ensures the miniaturization of the peristaltic pump.

Fig. 3 shows a third embodiment of the linear peristaltic pump of the present invention, which differs from the second embodiment. The pressing sheet 41 is a plastic pressing sheet, and two sets of pipe pressing devices 40 and driving devices 30 can be designed on one hose 20; the two sets of tube pressing devices 40 and the driving device 30 can be arranged on the hose 20 at intervals, and can be driven alternatively. It will be appreciated that in other embodiments, the platen tube assembly 40 and the drive assembly 30 are not limited to two, and may be multiple. The driving device 30 is arranged in one-to-one correspondence with the pipe pressing devices 40, and the pressing piece 41 in each set of pipe pressing devices 40 can be driven by a lifting mechanism arranged correspondingly to the pressing piece to reciprocate up and down in the radial direction of the hose 20. The press plates 41 of the two sets of tube pressing devices 40 may be secured above the hose 20 in a cascade manner. The two driving devices 30 can be electromagnet mechanisms, and the two electromagnet mechanisms can act asynchronously and sequentially to drive the corresponding pressing sheets 41 to sequentially press the hose 20, so that the efficiency of pumping liquid can be greatly improved, and the device is suitable for high-power occasions.

Fig. 4 shows a fourth embodiment of the linear peristaltic pump according to the present invention, which is different from the third embodiment in that a plurality of sets of tube pressing devices 40 and driving devices 30 may be provided on one hose 40, the driving devices 30 are disposed in one-to-one correspondence with the tube pressing devices 40, and the hose 20 may be repeatedly pressed by the plurality of sets of tube pressing devices 40. The driving device 30 may be an electromagnet mechanism, the electromagnet mechanisms may be asynchronously and alternately driven, after the hose 20 is extruded by the previous pressing piece 41, the pressing piece 41 at the back may sequentially perform extrusion actions, in this embodiment, the liquid may continuously flow from one side to the other side of the hose 20 without a non-return device, and the liquid delivery is completed. This embodiment is simple and suitable for a variety of applications.

Fig. 5 shows a fifth embodiment of the linear peristaltic pump according to the invention, which differs from the second embodiment in that two hoses 20 can be provided in the pump housing 10 side by side and in parallel. It will be appreciated that in some embodiments the number of hoses 20 is not limited. Each hose 20 can be correspondingly connected with a set of pipe pressing devices 40, and each pipe pressing device 40 is correspondingly driven by one electromagnet mechanism and does not affect each other, so that the liquid can be conveyed through multiple pipelines simultaneously. And the liquid delivery of each hose 20 can be independently driven by the corresponding driving device 30, so that different speeds of delivering liquid by different hoses 20 can be realized, and the peristaltic pump is ensured to be used for multiple purposes.

It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A linear peristaltic pump, characterized by comprising a pump shell (10) for a hose (20) to pass through, a tube pressing device (40) arranged in the pump shell (10), and a driving device (30) for driving the tube pressing device (40); the pipe pressing device (40) and the axial direction of the hose (20) form a first set included angle; the driving device (30) drives the pipe pressing device (40) to press and release the hose (20) in the radial direction of the hose (20).

2. The linear peristaltic pump of claim 1, characterized in that the tube pressing means (40) comprise a pressing piece (41) obliquely arranged in the pump housing (10) and at the first set angle to the axial direction of the hose (20) to reciprocally press and release the hose (20) in the radial direction of the hose (20).

3. A peristaltic pump according to claim 2, characterized in that the compression sheet (41) is an elastic compression sheet.

4. The linear peristaltic pump of claim 2 wherein the tube pressing means (40) further comprises a lifting mechanism connected to the driving means (30) and the pressing piece (41), the lifting mechanism being driven by the driving means (30) to drive the pressing piece (41) to reciprocally press and release the hose (20).

5. The linear peristaltic pump of claim 4 wherein the lifting mechanism comprises a crank block assembly (42) disposed within the pump housing (10) that reciprocates within a second set angle to drive the compression plate (41) to compress and release the hose (20);

the crank sliding block assembly (42) comprises a crank (421) with one end connected with the driving device (30), and a sliding block (422) which is arranged at the other end of the crank (421), is connected with the crank (421) and the pressing piece (41) and can slide towards the direction of the hose (20);

The driving device (30) comprises a driving motor capable of rotating positively and negatively.

6. The linear peristaltic pump of claim 4 wherein said driving means (30) comprises electromagnet means which, in the energized condition, produce electromagnetic induction with said tube pressing means (40) to drive said tube pressing means (40) to press said hose (20) in a radial direction of said hose (20);

The lifting mechanism comprises a sliding block (422) driven by the electromagnet mechanism to radially reciprocate towards the hose (20) through electromagnetic induction.

7. The linear peristaltic pump of claim 5 or 6 further comprising a guide assembly (50) to move the tube-pressing device (40);

the guide assembly (50) includes a guide groove provided at an inner side wall of the pump housing (10) and extending radially toward the hose (20) to guide the slider (422).

8. The linear peristaltic pump of claim 1 further comprising a non-return means (60) provided on said hose (20) to prevent backflow of fluid;

The non-return means (60) comprise a one-way valve or a pinch valve.

9. The linear peristaltic pump of claim 1 further comprising two fixed tube clamps (70) separately disposed at both ends of the pump housing (10) to secure the hose (20).

10. The linear peristaltic pump of claim 1 wherein said hoses (20) are plural, a plurality of said hoses (20) being disposed side-by-side in said pump housing (10); the driving device (30) and the pipe pressing device (40) are multiple and are arranged corresponding to the hose (20);

Or the number of the hoses (20) is one, the number of the driving devices (30) and the number of the pipe pressing devices (40) are multiple, and the driving devices (30) and the pipe pressing devices (40) are arranged in one-to-one correspondence and can be driven alternatively; a plurality of the tube pressing devices (40) are arranged on the hose (20) at intervals.