CN111412128A - Linear peristaltic pump - Google Patents

Abstract

The invention relates to a linear peristaltic pump, which comprises a pump shell for a hose to pass through, a pipe pressing device arranged in the pump shell, and a driving device for driving the pipe 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 extrude and loosen the hose to reciprocate 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, a peristaltic pump is a novel 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, causes pollution, has the characteristics of high precision, small size 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 can not meet the market demand.

The prior peristaltic pump generally adopts two structural forms of a rotary peristaltic pump and a linear peristaltic pump. A rotary peristaltic pump of the quick-install type is disclosed, as disclosed in publication No. CN 201821720567.6. The motor drives the roller group to rotate, so that the pipeline is extruded ceaselessly, and liquid is conveyed. The design has two sets of different diameter of gyration's wheel train, can be after the hose long-time work wearing and tearing appear, can directly change the wheel train of minor diameter, can be convenient for change increase of service life. However, the scheme still has the problems of large volume and low precision. Adopt the frictional force between motor shaft and the roller train to drive the roller train rotatory among this scheme to extrude the pipeline, but during motor shaft and the roller train transmission torque, skid easily, lead to the pump liquid not steady, the precision is not enough greatly. Further, as disclosed in publication No. CN201621359731.6, a peristaltic pump is disclosed which is easy to assemble and disassemble. This scheme adopts rotation type structure, drives gyro wheel extrusion pipeline through the driver and carries liquid. In this scheme, with the hose installation on the card subassembly, when the hose needs to be changed, can be through rotating card subassembly quick assembly disassembly hose, this peristaltic pump simple structure, with low costs, dismouting are convenient. However, the design scheme still has the problem that the driver is easy to slip when driving the roller to rotate, so that the precision is low.

The publication with the application number of CN201821612866.8 discloses a linear peristaltic pump roller transmission device. Adopt linear electric motor to drive the gyro wheel as the direction subassembly in this scheme, the synchronism is good, and transmission precision is high, can solve the poor problem of pump liquid precision. However, the design scheme has the problems of high cost and inconvenience in dismounting and replacing the pipeline. This scheme need choose for use linear electric motor, and high accuracy components such as lead screw realize, and the processing of whole scheme is higher with the assembly precision equally, causes the whole cost very high, and can not quick convenient dismouting change pipeline, leads to can not extensively popularize and apply. Further, as disclosed in publication No. CN201720890433.8, a linear reciprocating peristaltic pump is disclosed. According to the scheme, the lifting motion of the hose assembly and the cover plate assembly and the pipe clamping motion of the backflow prevention device are controlled by the curve of the cam mechanism, and liquid is pumped by the pipe pressing roller. The design scheme has low cost and stable transmission. But still has the problems of short service life, large volume and low liquid pumping precision.

Therefore, how to design a peristaltic pump with long service life, high precision, low cost and convenient assembly and disassembly is a technical problem which needs to be solved by the technical personnel in the field at present.

Disclosure of Invention

The invention aims to provide an improved linear peristaltic pump.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a linear peristaltic pump, which comprises a pump shell for a hose to pass through, a pipe pressing device arranged in the pump shell, and a driving device for driving the pipe 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 extrude and loosen the hose to reciprocate in the radial direction of the hose.

Preferably, the pressure pipe means includes a pressing piece obliquely provided in the pump housing at the first set angle to the axial direction of the hose to reciprocally press and release the hose in the radial direction of the hose.

Preferably, the compressed tablet is an elastic compressed tablet.

Preferably, the tube pressing device further comprises a lifting mechanism, and the lifting mechanism is connected with the driving device and the pressing sheet and drives the pressing sheet to press and release the hose in a reciprocating manner under the driving of the driving device.

Preferably, the lifting mechanism comprises a slider-crank assembly 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 block assembly comprises a crank with one end connected with the driving device and a block which is arranged at the other end of the crank, connected with the crank and the pressing sheet and capable of sliding towards the direction of the hose;

the driving device comprises a driving motor capable of rotating forward and backward.

Preferably, the driving device comprises an electromagnet mechanism which generates electromagnetic induction with the hose pressing device under the power-on state to drive the hose 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 in the radial direction of the hose through electromagnetic induction.

Preferably, the linear peristaltic pump further comprises a guide assembly to move the pressure tube means;

the guide assembly includes a guide groove provided in an inner side wall of the pump case and extending in a radial direction of the hose to guide the slider.

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

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

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

Preferably, the flexible pipe is a plurality of flexible pipes, and the flexible pipes are arranged in the pump shell side by side; the driving devices and the pipe pressing devices are multiple and are arranged corresponding to the hoses;

or the number of the hoses is one, the driving devices and 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 by one; the plurality of the pressure pipe devices are arranged on the hose at intervals.

The linear peristaltic pump has the following beneficial effects: this orthoscopic peristaltic pump passes through drive arrangement and drives the pipe device of pressing that sets up to become the setting of first settlement contained angle setting with the axial direction of hose in the pump case and make the extrusion or loosen the reciprocating motion of hose on the radial direction of hose, thereby can pump the liquid in the hose, the stable transport of liquid has been realized, the production of pulse when having reduced pump liquid, the steady transport of liquid has been guaranteed, the pump liquid precision has been improved, in addition through pressing the pipe device at the radial direction reciprocating motion of hose, it is long when having reduced with hose area of contact and contact, be difficult for causing the wearing and tearing of hose, the life of peristaltic pump has been guaranteed. The linear peristaltic pump has the characteristics of long service life, small volume, high precision, low cost and convenience in disassembly and assembly.

In addition, the pressing sheet of the pipe pressing device can be driven by the lifting mechanism to do circulating lifting motion, the hose is extruded to realize the conveying of liquid, the size of the peristaltic pump can be greatly reduced through the lifting mechanism, the miniaturization of the linear peristaltic pump is guaranteed, and meanwhile, the linear peristaltic pump is simple in structure, good in practicability, low in cost and convenient to popularize and apply widely.

The elevating system who goes up and down through having designed the circulation drives preforming extrusion hose, when drive arrangement drives the pressure pipe device pump liquid, the hose with press and can not produce the phenomenon of skidding between the pipe device, improved the precision of peristaltic pump, simultaneously, press and need not come pump liquid through the friction between pipe device and the hose, when the peristaltic pump was out of work moreover, press the pipe device and can not extrude the hose, reduced the wearing and tearing of hose, prolonged the life of peristaltic pump.

Drawings

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

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

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

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

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

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

wherein the pump housing 10; a pump body 11; a pump cover 12; a hose 20; a drive device 30; a pipe crimping device 40; a tablet 41; a slider-crank assembly 42; a crank 421; a slider 422; a guide assembly 50; a non-return device 60; the pipe clamp 70 is fixed.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Figure 1 shows a first embodiment of the linear peristaltic pump of the invention. The linear peristaltic pump may be a purely mechanical device or an electromechanical combination device, which can be used to pump liquids, which can be designed to be microminiature as required and which can guarantee a usable stroke. The linear peristaltic pump has the characteristics of long service life, small volume, high precision, low cost and convenience in disassembly and assembly.

Further, as shown in fig. 1, in the present embodiment, the linear peristaltic pump may include a pump housing 10, a driving device 30, and a pressure tube device 40. The pump housing 10 may be used for a hose 20 to pass through, and the hose 20 may be linearly disposed in the pump housing 10. The driving device 30 can be disposed in the pump housing 10, which can drive the pressure pipe device 40 to squeeze the hose 20. It is understood that in other embodiments, the driving device 30 is not limited to be disposed in the pump housing 10, but may be disposed outside the pump housing 10. The tube pressing device 40 may be disposed in the pump housing 10 and may be disposed at a first predetermined 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 a single hose, the driving device 30 and the pressure pipe device 40 may be a set, and the driving device 30 and the pressure pipe 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 a hollow structure, and an accommodating cavity may be formed inside the pump body 11, and an opening may be formed at a top of the pump body 11, and the opening may allow various components to be installed in the accommodating cavity. Through holes can be formed in two oppositely arranged side walls of the pump body 11, and the hose 20 can pass through the through holes. This pump body 11 inboard can set up the hose mounting groove for this hose installation, and this hose mounting groove can set up in the diapire of this pump body 11. It will be appreciated that in other embodiments, the hose mounting slot may be omitted. The pump cover 12 is disposed on the pump body 11, and can be detachably disposed on the pump body 11, and can cover the opening.

Further, in this embodiment, the hose 20 can be used for transporting liquid, gas and solid-liquid mixture, and the material used can be one or more of silicone rubber, polytetrafluoroethylene and synthetic material. Different materials have different performances, can meet different use occasions, and are convenient for more extensive popularization and use.

Further, in the present embodiment, the driving device 30 may be a rotary 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, is simple in driving method and easy to operate, can be used in more occasions, and can meet the requirement of high precision of a peristaltic pump when being matched with the tube pressing device 40. It will be understood that in other embodiments, the driving means is not limited to rotary driving means, and may be linear driving means, such as hydraulic driving means, electric driving means, and in particular, it may be a cylinder, or electric driving means formed by gears, motors, and racks. 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 outside the pump housing 10 and its output shaft may pass into the pump body 11 from outside the pump housing 10.

Further, in this embodiment, the tube pressing device 40 may include a pressing sheet 41 and a lifting mechanism. The pressing piece 41 is tiltably disposed in the pump housing 10 at a first set angle with respect to the axial direction of the hose 20, and can press and release the hose 20 reciprocally in the radial direction of the hose 20. It should be noted that this first set angle can be the acute angle, through adopting tilting structural design, can be convenient for steady the liquid that extrudes in the hose, and at extrusion hose in-process, long and area of contact when can effectively reduce with the contact of pressing pipe device 40 has guaranteed peristaltic pump life, and can increase pump liquid efficiency. In the present embodiment, the pressing piece 41 is an elastic pressing piece, and specifically, the pressing piece 41 may be a spring pressing piece. Of course, it is understood that in other embodiments, the pressing plate 41 is not limited to a spring pressing plate, and may be an alloy pressing plate, a plastic pressing plate, a rubber pressing plate, or the like. It is understood that, at the position where the pressing sheet 41 contacts the hose 20, a protective sleeve, such as a silicone protective sleeve, a plastic protective sleeve, etc., may be further provided to avoid unnecessary abrasion of the pressing sheet 41 to the hose 20.

The lifting mechanism can be disposed in the pump housing 10, and can be connected to the driving device 30 and the pressing plate 41, and can be driven by the driving device 30 to reciprocate along the radial direction of the hose 20, so as to drive the pressing plate 41 to circularly lift and to reciprocally squeeze and release the hose 20.

Further, in the present embodiment, the lifting mechanism may be a slider-crank assembly 42; of course, it will be appreciated that in other embodiments, the lift mechanism may not be limited to the slider-crank assembly 4242, which may be a slider mechanism, a cam mechanism, a gear mechanism, a ratchet mechanism, or the like. The lifting mechanism has the characteristics of small volume, simple principle and easy realization. In this embodiment, the slider-crank assembly 42 can be disposed in the pump housing 10, and can swing back and forth within a second predetermined angle, so as to drive the pressing sheet 41 to squeeze and release the hose 20. In some embodiments, the slider-crank assembly 42 may include a crank 421 and a slider 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 rotate in a reciprocating manner within a second set angle, so that the second rod body can be driven to rotate in a reciprocating manner. The second rod may be rotatably connected to the sliding block 422, which drives the sliding block 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 sheet 41, and can slide along a direction perpendicular to the flexible tube 20, so as to drive the pressing sheet to press or release the flexible tube 20 along the direction of the flexible tube 20.

Further, in the present embodiment, the linear peristaltic pump may further include a guiding assembly 50, and the guiding assembly 50 may be disposed in the pump housing 10, specifically, in some embodiments, the guiding assembly 50 may be mounted on an inner sidewall of the pump body 10, which may guide the movement of the pressure tube device 40. Specifically, in the present embodiment, the guide member 50 may be a guide groove. The guide groove may be formed on an inner sidewall of the pump housing 10, and it may be formed to extend in a radial direction of the hose 20, and it may be provided to allow the slider 422 to slide therein, thereby guiding the slider 422. It is understood that in other embodiments, the guiding assembly 50 may not be limited to the guiding groove, and may be a guiding rail, and the sliding block 422 may be slidably disposed on the guiding rail.

Further, in the present 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 pressure plate 41, which may be used to prevent the backflow of fluid. In this embodiment, the check device 60 may be a check 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 check device 60, the liquid can flow from one direction only, backflow cannot occur, the generation of pulses is reduced, and the flowing stability of the liquid is ensured.

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

When the linear peristaltic pump is used, the hose 20 passes through the through holes on the two side surfaces 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 fixed pipe clamps 70 are disposed at two ends of the pump housing 10, outside the pump housing 10, and clamped on the flexible pipes 20. The pressing sheet 41 is fixed with the sliding block 422 of the slider-crank assembly 42, the sliding block 422 is arranged in the guide slot, and then one end of the crank of the slider-crank assembly 42 is connected and fixed on the rotating shaft of the driving motor and is driven by the driving motor to rotate. And then the pump cover 12 is fixed on the pump body 11 by adopting a screw fastening mode.

The driving motor rotates forward, the crank of the slider-crank assembly 42 is driven by the driving motor to rotate, and further drives the slider to reciprocate along the guide slot, so as to drive the pressing sheet 41 to extrude the hose 20 along the radial direction, because the pressing sheet 41 adopts an inclined structural design, the right side of the pressing sheet contacts the hose 20 first, and in the process that the pressing sheet 41 continues to move downward, the pressing sheet 41 sequentially pressurizes the hose 20 along the radial direction from right to left until the pressing sheet 41 completely contacts and extrudes the hose 20. Liquid flows from right to left to the one-way valve during squeezing. The driving motor rotates reversely, of course, the driving motor can also rotate continuously, the pressing sheet 41 is driven by the crank-slider structure to move upwards along the guide groove along the slider 422 to leave the hose 20, negative pressure is generated on the hose 20 which is just pressed, because the left side of the hose 20 is provided with the one-way valve, the one-way valve only allows gas and liquid to flow from right to left, and the liquid on the right side of the hose 20 can be re-filled in the place which is just pressed to the left. The pressing sheet 41 reciprocates up and down under the drive of the slider-crank assembly 42, repeatedly squeezing the hose 20, and making the liquid flow from right to left in turn. When the rotating speed of the driving motor reaches a certain value, the pressing sheet 41 is driven by the slider-crank assembly 42 to rapidly extrude the hose 20, so that the liquid flows very stably, the generation of pulses is greatly reduced, and the stability of the peristaltic pump is ensured. Meanwhile, the crank block assembly 42 has a quick return characteristic, when the rotating speed of the driving motor is fixed, the upward movement speed of the pressing sheet 41 is higher than the downward movement speed, so that the liquid has enough time to fill the hose 20 after the hose 20 is extruded, the continuity of the peristaltic pump in pumping the liquid is ensured, and the requirement on the precision of the peristaltic pump under the extrusion of the pressing sheet 41 is also ensured. The crank block assembly 42 which is simple in working principle and high in practicability can meet the requirements, miniaturization can be achieved, the size of the peristaltic pump is greatly reduced, and meanwhile cost is low.

When pumping liquid, the pressing sheet 41 only can stably extrude a small section of the hose 20, the hose 20 is not easily abraded, and meanwhile, under the condition that the peristaltic pump does not work, the pressing sheet 41 cannot extrude the hose 20, so that the service life of the peristaltic pump is greatly prolonged. The design has fixed pipe strap 70 fixed hose 20, when needing to change hose 20, only need to take off the fixed pipe strap 70 of pump body 11 both sides, directly takes out hose 20 and changes, easy operation, the dismouting of being convenient for is changed the pipeline.

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

Figure 2 shows a second embodiment of the linear peristaltic pump of the invention. It differs from the first embodiment in that the drive means may comprise an electromagnet mechanism and is not limited to a drive motor. The electromagnet mechanism may be disposed on an inner sidewall of the pump housing 10, and may generate electromagnetic induction with the tube pressing device 40 under the power-on state to drive the tube 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, and 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 sliding block 422, the sliding block 422 may be disposed in the guiding slot, one end of the sliding block 422 may protrude out of the side wall of the guiding slot, one end of the sliding block 422 that protrudes out of the guiding slot may be connected to the electromagnet mechanism through electromagnetic induction, and the sliding block 422 may be driven by the electromagnet mechanism through battery induction to reciprocate radially toward the hose 20. In this embodiment, the check device 60 may be a pinch valve, not limited to a check valve.

When the flexible hose pressing mechanism is used, the pressing sheet 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 drives the pressing sheet 41 to move downwards along the guide groove until the hose 20 is completely extruded by the pressing sheet 41, the electromagnet mechanism is closed after liquid is pumped out from right to left, the electromagnetic force disappears, the electromagnet mechanism is reset, and the pressing sheet 41 and the sliding block 422 move upwards along the sliding groove 12 under the elastic force of the pressing sheet 41 until the pressing sheet 41 restores the 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 electromagnet mechanism operates repeatedly, so that the pressing sheet 41 is driven by the sliding block 422 to move up and down repeatedly in a linear manner, the hose 20 is repeatedly extruded, and the peristaltic pump can pump liquid continuously. The designed electromagnet mechanism 22 can realize the circular lifting motion of the peristaltic pump under the condition of 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 invention, which differs again from the second embodiment. The pressing sheet 41 is a plastic pressing sheet, and two sets of pressure pipe devices 40 and driving devices 30 can be designed on one hose 20; the two sets of pressure tube devices 40 and the driving device 30 can be arranged on the hose 20 at intervals, and one driving can be selected. It is understood that in other embodiments, the pressing tube device 40 and the driving device 30 are not limited to two, and may be plural. The driving device 30 and the tube pressing devices 40 are arranged in a one-to-one correspondence manner, and the pressing sheet 41 in each tube pressing device 40 can be driven by the lifting mechanism arranged in the correspondence manner to reciprocate up and down in the radial direction of the hose 20. The pressure plates 41 of the two sets of pressure tube means 40 may be secured in a cascading manner over the hose 20. The two driving devices 30 can be electromagnet mechanisms, and the two electromagnet mechanisms can asynchronously and sequentially act to drive the corresponding pressing sheets 41 to sequentially extrude the hose 20, so that the liquid pumping efficiency can be greatly improved, and the device is suitable for high-power occasions.

Fig. 4 shows a fourth embodiment of the linear peristaltic pump of the present invention, which is different from the third embodiment in that a plurality of sets of the tube pressing means 40 and the driving means 30 may be provided on one flexible tube 40, the driving means 30 may be provided in one-to-one correspondence with the tube pressing means 40, and the flexible tube 20 may be repeatedly pressed by the plurality of sets of the tube pressing means 40. The driving device 30 may be an electromagnet mechanism, the multiple sets of electromagnet mechanisms may be driven asynchronously and alternately, after the former pressing sheet 41 presses the hose 20, the latter pressing sheets 41 may sequentially perform a pressing action, in this embodiment, liquid may continuously flow from one side of the hose 20 to the other side without a check device, thereby completing the liquid transportation. This embodiment is simple and suitable for many 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 arranged side by side and in parallel in the pump housing 10. 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 pressure pipe devices 40, and each pressure pipe device 40 is correspondingly driven by an electromagnet mechanism without mutual influence, so that the simultaneous liquid conveying of multiple pipelines can be realized. And the liquid conveying of each hose 20 can be independently driven by the corresponding driving device 30, so that different speeds of conveying liquid by different hoses 20 can be realized, and the multipurpose use of the peristaltic pump is ensured.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (10)

1. A linear peristaltic pump is characterized by comprising a pump shell (10) for a hose (20) to pass through, a pressure pipe device (40) arranged in the pump shell (10), and a driving device (30) for driving the pressure pipe 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 perform extrusion and loosening reciprocating motion of the hose (20) in the radial direction of the hose (20).

2. The linear peristaltic pump according to claim 1, wherein the pressure tube means (40) comprises a pressing piece (41) obliquely disposed in the pump housing (10) and forming the first set angle with the axial direction of the hose (20) to reciprocally press and release the hose (20) in a radial direction of the hose (20).

3. Linear peristaltic pump according to claim 2, characterized in that said presser blade (41) is an elastic presser blade.

4. The linear peristaltic pump according to claim 2, wherein the pressure tube device (40) further comprises a lifting mechanism, the lifting mechanism is connected with the driving device (30) and the pressing sheet (41), and the lifting mechanism is driven by the driving device (30) to press and release the pressing sheet (41) to and fro the hose (20).

5. The linear peristaltic pump according to claim 4, wherein the lifting mechanism comprises a slider-crank assembly (42) disposed in the pump housing (10) and reciprocally swingable within a second set angle to press the pressing plate (41) and release the flexible tube (20);

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

the driving device (30) comprises a driving motor capable of rotating forward and backward.

6. The linear peristaltic pump according to claim 4, wherein the driving device (30) includes an electromagnet mechanism that, in the energized state, generates electromagnetic induction with the pressure tube device (40) to cause the pressure tube device (40) to press the flexible tube (20) in a radial direction of the flexible tube (20);

the lifting mechanism comprises a sliding block (422) driven by the electromagnet mechanism to reciprocate in the radial direction of the hose (20) through electromagnetic induction.

7. Linear peristaltic pump according to claim 5 or 6, characterized in that it further comprises a guide assembly (50) to move said pressure tube means (40);

the guide assembly (50) includes a guide groove provided in an inner sidewall of the pump housing (10) and extending in a radial direction of the hose (20) to guide the slider (422).

8. The linear peristaltic pump of claim 1, further comprising a non-return device (60) disposed on the flexible tube (20) to prevent the backflow of fluid;

the non-return means (60) comprises a one-way valve or a pinch valve.

9. The linear peristaltic pump of claim 1, further comprising two retaining clips (70) disposed separately at opposite ends of the pump housing (10) for retaining the flexible tube (20).

10. The linear peristaltic pump according to claim 1, characterized in that said flexible tube (20) is in plurality, a plurality of said flexible tubes (20) being arranged side by side in said pump housing (10); the driving devices (30) and the pipe pressing devices (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 both multiple, and the multiple driving devices (30) and the multiple pipe pressing devices (40) are arranged in a one-to-one correspondence manner and can be driven by one; the plurality of pressure pipe devices (40) are arranged on the hose (20) at intervals.

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