CN218325214U - Extrusion driving structure and extrusion peristaltic pump - Google Patents

Abstract

The embodiment of the specification discloses extrusion drive structure and extrusion formula peristaltic pump, wherein, extrusion drive structure includes: fly leaf, ball screw mechanism, removal frame one and removal frame two adopt ball screw mechanism to replace the cam structure as actuating mechanism in this scheme, because ball screw mechanism's screw thread pair itself has the steady advantage of transmission for the ascending process motion of fly leaf is steady, has reduced the impact that the sudden movement by the fly leaf led to the fact the hose, and then has improved the stability that the extrusion pump carried. Meanwhile, the first moving frame and the movable plate form a parallel connecting rod mechanism, so that the movable plate can stably move up and down, and the problem of unbalance loading on two sides of the movable plate is avoided.

Description

Extrusion driving structure and extrusion peristaltic pump

Technical Field

The application relates to the technical field of peristaltic pumps, in particular to an extrusion driving structure and an extrusion type peristaltic pump.

Background

In the prior art, most of extrusion pumps drive a movable block to move in the vertical direction by a cam mechanism, but because the cam mechanism is a high-pair mechanism, when the movable block is driven to move upwards, thrust in the horizontal direction is generated on the movable block, so that the movable block has a movement trend in the horizontal direction in the movement process, the movable block cannot move stably in the vertical direction, the extrusion pump cannot work stably due to instability of movement, and the pumping precision of the extrusion pump is further influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the embodiments of the present specification are implemented as follows:

an embodiment of this specification provides a squeeze driving structure, includes: the movable plate is arranged on the movable frame, the ball screw mechanism is arranged on the movable frame, the movable frame is connected with the movable plate through a connecting rod, the movable frame is arranged on the movable frame, the ball screw mechanism is used for driving the movable frame to move, and the movable frame is horizontally moved.

Optionally, the ball screw mechanism includes: the first nut is fixedly connected with the first movable frame, the second nut is fixedly connected with the second movable frame, the screw rod is respectively in threaded connection with the first nut and the second nut, and the first nut and the second nut sequentially penetrate through the screw rod in the axial direction.

Optionally, the screw thread directions of the first nut and the second nut are opposite, and the ball screw mechanism drives the moving direction of the first moving frame and the moving direction of the second moving frame to be opposite.

Optionally, the pressing driving structure further includes: the movable plate, the first moving frame and the second moving frame are arranged in the rack, and the screw rod is rotatably connected to the rack; the two ends of the rack are provided with sliding rails, the first moving frame and the second moving frame are close to one end of the rack and provided with sliding grooves, and the sliding rails are matched with the sliding grooves.

Optionally, the number of the movable plates is two, the two movable plates are symmetrically arranged relative to the first movable frame, and any one of the movable plates is connected with the first movable frame and the second movable frame through a connecting rod.

Optionally, the connecting rod comprises a first rod section and a second rod section which are matched with each other, a saw tooth structure which can be meshed with each other is arranged at a position where the first rod section and the second rod section are installed in a matched mode, and the length of meshing of the first rod section and the second rod section can be adjusted.

The present description embodiment also provides an extrusion formula peristaltic pump, includes: foretell extrusion actuating structure, frame, pipe clamp mechanism and apron, extrusion actuating structure sets up inside the frame, the apron is fixed to be set up the top of frame, the frame corresponds the position of fly leaf sets up the trompil, the fly leaf with be used for holding the hose between the apron, pipe clamp mechanism is fixed to be set up the both ends of apron, pipe clamp mechanism is used for the centre gripping the hose.

Optionally, the pipe clamp mechanism comprises a pipe clamp shell, a first holding claw and a second holding claw, the first holding claw and the second holding claw are both arranged on the pipe clamp shell, and the first holding claw and the second holding claw can be crossed to fix the hose.

Optionally, the first holding claw and the second holding claw are connected with the inner side wall of the pipe clamp shell through springs, and the first holding claw and the second holding claw are rotationally connected with the pipe clamp shell.

Optionally, the first holding claw or the second holding claw is movably connected with the pipe clamp shell, and the distance between the first holding claw and the second holding claw can be adjusted.

Optionally, the pipe clamp mechanism further comprises a first operating rod and a second operating rod which are arranged in parallel, the first operating rod and the second operating rod are racks, the two racks are connected through gear engagement, the first operating rod is movably connected with the first holding claw, and the second operating rod is movably connected with the second holding claw.

Optionally, the pipe clamp mechanism further comprises a translation plate, the second holding claw is fixed on the translation plate, and one side of the translation plate is connected with the pipe clamp shell through a spring.

Optionally, the first holding claws and the second holding claws form a holding claw group, and the holding claw groups are multiple and arranged at intervals in the vertical direction of the hose.

Optionally, the first holding claw is in linkage, or the second holding claw is in linkage.

The embodiment of the specification adopts at least one technical scheme which can achieve the following beneficial effects:

adopt ball screw mechanism to replace the cam structure as actuating mechanism in this scheme, because ball screw mechanism's screw thread pair itself has the steady advantage of transmission for the process of rising motion of fly leaf is steady, has reduced the impact that the sudden movement by the fly leaf led to the fact the hose, and then has improved the stability of extrusion pump delivery. Meanwhile, the first moving frame and the movable plate form a parallel connecting rod mechanism, so that the movable plate can stably move up and down, and the problem of unbalance loading on two sides of the movable plate is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram illustrating a squeezing actuating structure coupled to a flexible pipe according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of an extrusion pump provided in an embodiment of the present disclosure;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 2;

FIG. 5 is a schematic view of a connecting rod structure;

FIG. 6 is a schematic view of a check valve and hose mounting structure;

FIG. 7 is a schematic perspective view of the clamp type pipe clamp mechanism;

FIG. 8 is a bottom view of the clamp type pipe clamp mechanism

FIG. 9 is a cross-sectional view of the clamp type pipe clamp mechanism;

fig. 10 is a perspective view of the movable pipe clamping mechanism;

1. a one-way valve; 2. a hose; 3. an extrusion drive structure; 4. a movable plate; 5. a first nut; 6. a second nut; 7. a lead screw; 8. a first movable frame; 9. a second moving frame; 10. a connecting rod; 10-1, a first rod section; 10-2 and a second rod section; 11. a coupling; 12. a motor; 13. a pipe clamp mechanism; 14. a cover plate; 15. a chute; 16. a slide rail; 17. a frame; 18. a first pipe clamp shell; 19. a first holding claw; 20. a second holding claw; 21. a finger-shaped structure; 22. A first spring; 23. a first operating lever; 24. a second operating lever; 25. an operation branch; 26. a gear; 27. moving the clamping group; 28. a pipe clamp shell II; 29. a third holding claw; 30. c, holding a claw IV; 31. a translational plate; 32. a slideway; 33. and a second spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In order to avoid cam extrusion mechanism to cause the problem of fly leaf at the horizontal direction motion easily, the utility model discloses in adopt ball screw mechanism drive fly leaf to reciprocate. The extrusion driving structure that it provided specifically includes: the movable rack I and the movable rack II are connected with the movable board through a connecting rod, the movable rack I, the movable rack II and the movable board form a parallel connecting rod mechanism, and the ball screw mechanism is used for driving the movable rack I and the movable rack II to move horizontally.

In this embodiment, the movable plate may be understood as a pressing member that can move up and down to press the hose in contact therewith. The first moving frame and the second moving frame are driving parts moving horizontally and are used for driving the movable plate to move up and down, wherein the ball screw mechanism provides power and is used for driving the first moving frame and the second moving frame to move horizontally. The first moving frame, the second moving frame and the movable plate form a parallel connecting rod structure, which can be a four-connecting rod, a six-connecting rod, an eight-connecting rod and the like. In one case, the first movable frame and the second movable frame have opposite moving directions, and when the screw is connected with the screw rod, the screw direction can be set to be opposite.

The thread pair of the ball screw mechanism has the advantage of stable transmission, so that the movable plate can stably move in the ascending process, the impact of sudden movement of the movable plate on the hose is reduced, and the conveying stability of the extrusion pump is improved. Meanwhile, the first movable frame and the movable plate form a parallel connecting rod mechanism, so that the movable plate can move up and down stably, and the problem of unbalance loading on two sides of the movable plate is avoided.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, the pressing driving structure 3 includes a movable plate 4, a first movable frame 8 and a second movable frame 9, the first movable frame 8 and the second movable frame 9 are disposed at an upper position and a lower position with respect to the movable plate 4, and the first movable frame 8 and the second movable frame 9 are disposed at the same side of the movable plate 4, and are sequentially arranged along the length direction of the movable plate 4 at a certain distance from each other in the first movable frame 8 and the second movable frame 9. Wherein, the length direction of the movable plate 4 is the placing direction of the hose. The first moving frame 8 is connected with the movable plate 4 through a first connecting rod group, the second moving frame 9 is connected with the movable plate 4 through a second connecting rod group, and both the first connecting rod group and the second connecting rod group are four connecting rods (as shown by a number 10 in fig. 1) with the same length. Two connecting rods (arranged in parallel) are respectively arranged on two sides of the first moving frame 8 and connected with the movable plate 4, and two connecting rods (arranged in parallel) are respectively arranged on two sides of the second moving frame 9 and connected with the movable plate 4

Wherein, the connecting rod 10 is hinged on the first moving frame 8 and the second moving frame 9.

The utility model discloses an extrusion drive structure is still including being used for the drive to remove a 8 and remove a 9 ball screw mechanism along horizontal direction relative motion, this ball screw mechanism includes a lead screw 7 that has the right-handed screw and a nut 5 that has the right-handed screw and a nut two 6 that has the left-handed screw, nut 5 and nut two 6 wear to establish on lead screw 7 along axial direction in proper order, and, nut 5 with remove a 8 fixed connection, nut two 6 with remove a two 9 fixed connection, when lead screw 7 is rotatory, because nut 5 and nut two 6 are the cooperation to the opposite direction of turning to with lead screw 7, make lead screw 7 can drive nut 5 and nut two 6 simultaneously along opposite direction or opposite direction motion.

As shown in fig. 4, in order to ensure that the first nut 5 and the second nut 6 only move in a linear direction, the nut further includes a slide rail 16 horizontally arranged along the horizontal direction, and at the same time, a slide groove 15 is further arranged at a position where the first moving frame 8 and the second moving frame 9 contact with the slide rail 16, the slide groove 15 is in sliding connection with the slide rail 16 in a matching manner, and the slide groove 15 is arranged along the moving direction of the moving frame or along the guiding direction of the ball screw mechanism, so that not only the slide groove 15 is ensured to move along the horizontal direction of the slide rail 16, but also the slide rail 16 is limited by the slide rail 16 in the vertical direction, and vertical movement is prohibited (since the moving frame is fixedly connected with the nuts, the slide rail 16 is also actually arranged to limit the nuts to rotate, and ensure that the nuts can only move along the horizontal direction).

As shown in fig. 2, simultaneously in order to fix the ball screw mechanism and the slide rail 16, the utility model discloses still include frame 17, wherein the rotatable connection of lead screw 7 is in frame 17, slide rail 16 and frame 17 fixed connection, and lead screw 7 one end passes through shaft coupling 11 transmission with the motor and is connected. The movable plate 4 and the link mechanism are disposed inside the frame 17.

Example two

In order to improve the extruded work efficiency, can extrude more pipelines simultaneously, can also set up two fly leaves for two directions extrude the hose respectively about following the frame, two-way transport liquid. The two movable plates are symmetrically arranged relative to the first movable frame 8 and the second movable frame 9, namely the same connecting rod and the same movable plate are arranged on the other sides of the first movable frame 8 and the second movable frame 9. Reference may be made to corresponding parts of the squeeze pump in figures 2-4.

EXAMPLE III

Based on the extrusion driving structure provided by the first embodiment, in order to fine tune the length difference between the connecting rods, the connecting rod of the present embodiment is provided with a length adjusting structure. As shown in FIG. 5, the connecting rod 10 comprises a first rod segment 10-1 and a second rod segment 10-2 which are mutually matched, wherein the matching position of the first rod segment 10-1 and the second rod segment 10-2 is provided with a saw tooth structure, the saw tooth structures of the first rod segment 10-1 and the second rod segment 10-2 can be mutually meshed, and the meshing length of the first rod segment 10-1 and the second rod segment 10-2 can be adjusted. When in use, if the movable plate cannot be kept horizontal after being installed due to the inconsistent lengths of the connecting rods 10, the lengths are adjusted by adjusting the saw tooth matching positions of the first rod section 10-1 and the second rod section 10-2.

Example four

Based on the extrusion driving structure of the first embodiment, the present embodiment provides an extrusion type peristaltic pump, as shown in fig. 1 to 4, including: the hose clamping device comprises an extrusion driving structure 3, a frame 17, a hose clamping mechanism 13 and a cover plate 14, wherein the extrusion driving structure 3 is arranged inside the frame 17, the cover plate 14 is fixedly arranged above the frame 17, an opening is formed in the position, corresponding to the movable plate 4, of the frame 17, the hose 2 is accommodated between the movable plate 4 and the cover plate 14, the hose clamping mechanism 13 is fixedly arranged at two ends of the cover plate 14, and the hose clamping mechanism 13 is used for clamping the hose 2.

The top and the bottom of the frame 17 are provided with through holes corresponding to the positions of the movable plate 4, when the movable plate 4 is driven by the link mechanism to extend out of the position of the hose 2 arranged below the frame 17, the upper movable plate 4 presses the hose above the frame 17 against the upper cover plate 14, and the lower movable plate 4 presses the hose below the frame 17 against the lower cover plate 14.

In addition, the supporting legs arranged below the frame 17 can support the whole frame 17, so that the problem that the cover plate 14 below is not easy to open and close due to direct contact with the placing surface of the extrusion pump is avoided.

The working principle is as follows: the initial positions of the first movable frame 8 and the second movable frame 9 are close to each other, when the extrusion pump extrudes the hose, the motor drives the screw rod 7 to rotate to drive the first nut 5 and the second nut 6 to move towards opposite directions simultaneously, so that the first movable frame 8 and the second movable frame 9 move towards opposite directions simultaneously, and as the first movable frame 8 and the second movable frame 9 are connected with the movable plate 4 through the connecting rod 10, the movable frame moves outwards to enable the connecting rod of the hinge point on the movable plate 4 to rotate outwards, further the distance between the movable frame and the movable plate 4 is increased, and the movable plate 4 is pushed to move the extrusion hose 2 towards the cover plate 14. Because the thread pair transmission of the ball screw mechanism has the advantage of stable transmission, the moving of the movable plate 4 in the lifting process is stable, the impact on the hose caused by the impact motion of the movable plate 4 is reduced, and the conveying stability of the extrusion pump is improved. Meanwhile, the first movable frame 8 and the second movable frame 9 and the movable plate 4 form a parallelogram mechanism, so that the movable plate 4 can move up and down stably, and the problem of unbalanced loading on two sides of the movable plate 4 in the background technology is avoided.

In order to simplify the structure of the squeeze pump, the stop valve of the squeeze pump is replaced by the check valve. As shown in fig. 8, two ends of the hose are respectively connected with two check valves, the check valve arranged in the liquid inlet direction is a liquid inlet valve, the check valve arranged in the liquid discharge direction is a liquid discharge valve, and the flow directions of the two check valves are the same, so that the pipelines are communicated along a single direction. When the hose is used, the hose is extruded, the pressure in the hose is increased, the pressure in the hose pushes the liquid inlet valve to be closed, air in the hose is discharged through the liquid discharge one-way valve in the liquid discharge direction, after the hose is loosened, the hose is restored to the volume by the elasticity of the hose, in the process, the negative pressure in the hose is increased, the liquid discharge valve is closed, liquid flows into the hose from the liquid inlet valve direction, and finally, in the repeated extrusion process of the hose, the liquid in the hose flows to the liquid discharge valve from the liquid inlet one-way valve direction. Because the drain valve is closed in the hose resetting process to avoid liquid backflow, the compressed volume of the hose is the volume of the discharged liquid, and the pumping precision of the extrusion pump can be conveniently controlled.

The check valve is of a conventional check valve pipeline structure and mainly comprises a diaphragm type check valve, a spring type check valve and a duckbill type check valve, and the opening pressure of the check valve cannot be greater than the negative pressure of an inner cavity of the hose and the pressure generated by squeezing in the hose.

In order to achieve a better function of the squeeze pump, the smaller the opening pressure and the back seal pressure of the check valve, the better. In order to achieve repeated squeezing of the hose of the squeeze pump, the drive mechanism may be a conventional cam mechanism.

In view of the above one-way valve pipeline structure, the present specification also provides several pipe clamping mechanisms, as shown in the following embodiments.

EXAMPLE five

The embodiment provides a embrace formula of pressing from both sides pipe clamp relies on the pipe clamp to embrace and presss from both sides the hose and makes the hose produce the deformation, and the fixed effect to the hose is improved to the frictional force between increase pipe clamp and the hose.

As shown in fig. 7, the pipe clamp mechanism includes a first pipe clamp shell 18, a first holding claw 19 and a second holding claw 20, wherein one end of the first holding claw 19 is provided with a plurality of finger structures 21, the finger structures 21 of the first holding claw 19 and the second holding claw 20 are bent inwards, and the finger structures 21 of the first holding claw 19 and the second holding claw 20 can be crossed with each other. The first holding claw 19 and the second holding claw 20 are rotatably arranged on the pipe clamp shell, and the finger-shaped structures 21 of the first holding claw 19 and the second holding claw 20 are oppositely provided with bent clamping hoses.

The first pipe clamp housing 18 is fixedly arranged at two ends of the extrusion pump cover plate 14, or two ends of the cover plate 14 are directly integrated with the first pipe clamp housing 18. It should be noted that the pressure receiving surface of the first clamp housing 18 is in the same plane as the working surface of the cover plate 14. When the hose 2 is installed, the finger-shaped structures 21 of the first holding claw 19 and the second holding claw 20 are mutually crossed to clamp the hose, the finger-shaped structures 21 are all in contact with the outer wall of the hose 2, the contact friction force is increased, the fixing effect of the hose is improved, and meanwhile, the hose 2 is clamped on the working surface of the cover plate 14 under the clamping action of the holding claw group, so that the problem that the working precision of the flow extrusion pump is reduced due to the fact that the hose 2 shakes when being pressed due to the distance between the hose 2 and the working surface of the cover plate 14 is solved.

The other ends of the first holding claw 19 and the second holding claw 20 are respectively provided with a spring which is connected with the inner side wall of the pipe clamp shell, and the springs provide tension for the first holding claw 19 and the second holding claw 20. Therefore, when the first holding claw 19 and the second holding claw 20 rotate towards the inner side, the hose 2 can be held tightly towards the direction of the pipe clamp shell, so that the hose is held tightly towards a supporting surface, the friction force for fixing the hose is further improved, the first holding claw 19 and the second holding claw 20 apply pressure to the hose simultaneously, the radial direction stress of the hose can be kept uniform, the stability for fixing the hose is further improved, and the clamping effect of the hose is improved.

In addition, the finger-shaped structures 21 are arranged on the holding claw so as to prolong the fixed length of the hose in the axial direction, increase the contact area with the hose to improve the clamping force of the pipe clamp and avoid the movement of the hose in the axial direction. When the hose needs to be replaced, the first holding claw 19 and the second holding claw 20 are separated to release the hose 2.

When a plurality of hoses need to be clamped, the first holding claws 19 and the second holding claws 20 form a holding claw group, a plurality of groups of holding claws are sequentially arranged in the pipe clamp shell along the length direction of the shell, and the first holding claws 19 and the second holding claws 20 of the adjacent holding claw groups are connected through the first springs 22.

In order to realize the simultaneous opening of multiple groups of holding claws, the embodiment is further provided with two operating levers (shown in fig. 8-9) which can slide in parallel along the length direction on the inner side of the pipe clamp shell body 18, each operating lever is provided with a plurality of operating branches 25, the operating branch of the operating lever I23 is movably connected with the holding claw I19 of each holding claw group, the operating branch of the operating lever II 24 is movably connected with the holding claw II 20 of each holding claw group, when the pipe clamp is used, the operating lever I23 can be moved to simultaneously rotate all the holding claws I19, and the operating lever II 24 can be moved to simultaneously rotate all the holding claw II 20. In order to realize the linkage of the two control rods, the second control rod 24 and the first control rod 23 in the utility model are in a rack structure, and the teeth of the second control rod and the teeth of the first control rod are arranged oppositely. A gear 26 is further arranged between the first operating lever 23 and the second operating lever 24, and the gear 26 is meshed with teeth on the first operating lever 23 and the second operating lever 24 respectively, so that the linkage of the other operating lever can be realized by moving one operating lever, or the gear 26 is directly rotated, the first operating lever 23 and the second operating lever 24 can be simultaneously moved, and then the first holding claw 19 and the second holding claw 20 are simultaneously opened.

Example six

As shown in fig. 10, the clamp-type pipe clamp of this embodiment is a moving structure, and its operation principle and effect are the same as those of the fifth embodiment, except that the rotating clamp claw is replaced by a moving clamp claw. Specifically, a plurality of moving clamping groups 27 are arranged on the second pipe clamp shell 28, and each moving clamping group 27 comprises a three-clasping claw 29 fixed on the second pipe clamp shell 28 and a four-clasping claw 30 which is arranged opposite to the three-clasping claw 29 and can horizontally move along the length direction of the second pipe clamp shell 28. The fourth holding claw 30 is fixed on the flat moving plate 31, the slide way 32 is arranged on the inner side of the second pipe clamp shell 28 along the length direction, the flat moving plate 31 is matched with the slide way 32 for use, the flat moving plate 31 can only move along the slide way 32, and when the hose clamping device is used, the flat moving plate 31 is moved along the horizontal direction, so that the fourth holding claw 30 can be close to or far away from the third holding claw 29, and the hose can be clamped and released.

In order to realize the clamping effect of the movable clamping group 27, a second spring 33 is arranged at one end of the translation plate 31 in the moving direction and connected with the second pipe clamp shell 28, and the second spring 33 provides power for the translation plate 31 to push the fourth holding claw 30 to move towards the third holding claw 29 so as to maintain the clamping force.

When a plurality of groups of pipe clamps are arranged, the three embracing claws 29 are sequentially arranged at intervals along the length direction of the second pipe clamp shell 28, meanwhile, the flat movable plate 31 is sequentially provided with a plurality of four embracing claws 30 along the length direction, and the distance between every two adjacent four embracing claws 30 is the same as that between every two adjacent three embracing claws 29.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (14)

1. A press drive structure, comprising: the movable rack comprises a movable plate, a ball screw mechanism, a movable rack I and a movable rack II, wherein the movable rack I and the movable rack II are located on the same side of the movable plate, the movable rack I and the movable rack II are connected with the movable plate through connecting rods, the movable rack I, the movable rack II and the movable plate form a parallel connecting rod mechanism, and the ball screw mechanism is used for driving the movable rack I and the movable rack II to move horizontally.

2. The extrusion drive structure as set forth in claim 1, wherein the ball screw mechanism includes: the first nut is fixedly connected with the first movable frame, the second nut is fixedly connected with the second movable frame, the screw rod is respectively in threaded connection with the first nut and the second nut, and the first nut and the second nut sequentially penetrate through the screw rod in the axial direction.

3. The extrusion driving structure as claimed in claim 2, wherein the screw thread directions of the first nut and the second nut are opposite, and the moving directions of the first moving frame and the second moving frame driven by the ball screw mechanism are opposite.

4. The extrusion drive structure of claim 2, further comprising: the movable plate, the first moving frame and the second moving frame are arranged in the rack, and the screw rod is rotatably connected to the rack; the two ends of the rack are provided with sliding rails, the first moving frame and the second moving frame are close to one end of the rack and are provided with sliding grooves, and the sliding rails are matched with the sliding grooves.

5. The pressing driving structure as claimed in claim 1, wherein the number of the movable plates is two, two movable plates are symmetrically disposed with respect to the first movable frame, and any one of the movable plates is connected to the first movable frame and the second movable frame through a connecting rod.

6. The extrusion driving structure as claimed in claim 1, wherein said link comprises a first segment and a second segment which are mutually engaged, said first segment and said second segment being cooperatively installed with a saw tooth structure which can be engaged with each other, and a length of engagement of said first segment and said second segment being adjustable.

7. An extruded peristaltic pump, comprising: the extrusion driving structure, the frame, the pipe clamping mechanism and the cover plate according to claim 1, wherein the extrusion driving structure is disposed inside the frame, the cover plate is fixedly disposed above the frame, the frame is provided with an opening corresponding to the position of the movable plate, a hose is accommodated between the movable plate and the cover plate, the pipe clamping mechanism is fixedly disposed at two ends of the cover plate, and the pipe clamping mechanism is used for clamping the hose.

8. The extrusion peristaltic pump of claim 7, wherein the tube clamp mechanism comprises a tube clamp housing, a first holding claw and a second holding claw, the first holding claw and the second holding claw are both arranged on the tube clamp housing, and the first holding claw and the second holding claw can intersect with each other to fix a hose.

9. The extrusion peristaltic pump as recited in claim 8, wherein the first holding claw and the second holding claw are both connected to the inner side wall of the tube clamp housing through springs, and the first holding claw and the second holding claw are both rotatably connected to the tube clamp housing.

10. The extrusion peristaltic pump as recited in claim 8, wherein the first clasping claw or the second clasping claw is movably connected with the tube clamp shell, and a distance between the first clasping claw and the second clasping claw is adjustable.

11. The extrusion type peristaltic pump as claimed in claim 9, wherein the tube clamping mechanism further comprises a first operating rod and a second operating rod which are arranged in parallel, the first operating rod and the second operating rod are racks, the two racks are meshed and connected through a gear, the first operating rod is movably connected with the first holding claw, and the second operating rod is movably connected with the second holding claw.

12. The squeeze peristaltic pump as claimed in claim 10, wherein the tube clamp mechanism further comprises a translation plate, the second holding jaw is fixed to the translation plate, and one side of the translation plate is connected to the tube clamp housing through a spring.

13. The extrusion type peristaltic pump as claimed in claim 8, wherein the first holding claw and the second holding claw form a plurality of holding claw groups which are arranged at intervals in the vertical direction of the hose.

14. The extrusion peristaltic pump of claim 13, wherein a plurality of the clasping claws are linked one by one, or a plurality of the clasping claws are linked two by two.

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