Peristaltic pump head with hose restraint

Abstract

The utility model discloses a peristaltic pump head with hose limiting, belongs to fluid delivery equipment technical field, including front shell, back shell, upper pressure piece and lower support. The front shell is equipped with gyro wheel assembly between back shell, and one end of upper pressure piece is hinged in back shell through pivot, and the other end is connected with lower support through elastic bolt subassembly. The lower surface of upper pressure piece is equipped with the blocking strip for limiting hose axial movement, and the elastic bolt subassembly contains spring, can provide buffer and adjust the compression force, and the both sides of lower support are equipped with the inclined tooth mesh formula pipe clamp structure convenient to operate, is used for fastening hose port. The utility model can effectively prevent the hose from running and moving and falling off, reduce abrasion, prolong life, adjust the pipe pressure more accurately at the same time, and the hose installation is fixed more convenient and reliable.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport equipment technology, specifically to a peristaltic pump head, and more particularly to a peristaltic pump head with a hose limiting function. Background Technology

[0002] A peristaltic pump is a device that delivers fluid by alternately squeezing and releasing a hose with rollers. Because the fluid only comes into contact with the pump tube, there is no cross-contamination, and it is easy to clean and replace, it is widely used in the fields of medicine, food, chemical industry and laboratory.

[0003] Existing peristaltic pump heads typically consist of a front housing, a rear housing, and a roller assembly positioned between the two. A hose is wound around the roller assembly and pressed against the pump head by a clamping block to create the necessary sealing compression. However, the prior art suffers from the following major problems: Unreliable hose positioning: During pump operation, especially at high speeds or pressure fluctuations, the hose is prone to axial movement or radial runout due to centrifugal force or internal pressure. This movement can cause friction and wear between the hose and the pump head, shortening the hose's lifespan. In severe cases, it may even cause the hose to detach from the pump head, resulting in fluid leakage, delivery interruption, or equipment contamination.

[0004] Inconvenient clamping force adjustment: The clamping force of the clamping block on the hose is crucial. Insufficient clamping force will lead to poor sealing, reduced delivery efficiency, and even backflow; excessive clamping force will exacerbate hose fatigue and wear, shortening its service life. Most existing pump heads are directly clamped by bolts, and the adjustment of clamping force lacks buffering and is not easy to control precisely, often relying on the operator's experience.

[0005] Hose installation and fixing are cumbersome: Some pump heads lack a dedicated hose clamping mechanism, and both ends of the hose need to be fixed with external clamps, which is inconvenient to operate and the fixing effect is inconsistent.

[0006] Therefore, there is an urgent need for a peristaltic pump head that can effectively limit the position of the hose, facilitate the adjustment of the clamping force, and is easy to operate. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a peristaltic pump head with hose limiting. This pump head can effectively prevent the hose from moving during operation, extend the service life of the hose, and at the same time, the clamping force is easy and reliable to adjust.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A peristaltic pump head with hose limiting includes a front shell, a rear shell, an upper pressure block, and a lower support; the front shell and the rear shell are arranged opposite to each other, and a roller assembly connected to the bearings of the two is provided between them; the upper pressure block and the lower support are respectively located at the top and bottom of the roller assembly; one end of the upper pressure block is connected to the rear shell through a rotating shaft, and the other end is connected to the lower support through a bolt assembly; The lower surface of the upper pressure block is provided with a blocking strip; the hose is installed on one side of the blocking strip.

[0009] Furthermore, one end of the upper pressure block is provided with a through hole, which is directly opposite the threaded hole on the rear shell; the threaded end of the rotating shaft passes through the through hole and is threadedly engaged with the threaded hole A.

[0010] Furthermore, the other end of the upper pressure block is provided with a slot, which passes through the upper pressure block and has an opening facing outward; the bolt assembly is located in the slot and is connected to the lower support.

[0011] Furthermore, the bolt assembly includes a positioning nut, a positioning screw, a spring A, and a washer; the positioning screw is fixed on the lower support and passes through the slot and protrudes from the top of the slot; the positioning nut is threadedly connected to the positioning screw, and the spring A and the washer are both fitted on the positioning screw and located between the slot and the positioning nut, wherein the washer abuts against the slot.

[0012] Furthermore, the lower support includes a support base and a support platform; there are two support platforms, which are respectively located at both ends of the support base; the two ends of the upper pressure block are respectively located on the top of the corresponding support platform.

[0013] Furthermore, pipe clamp structures are provided on both the left and right sides of the lower support, namely a left pipe clamp structure and a right pipe clamp structure; the pipe clamp structure includes an upper clamp plate and a lower clamp plate; The lower plate is installed on one side of the support platform of the lower support, and a slide rail is formed between the two for the upper plate to slide up and down; a V-shaped groove is provided on the lower plate directly opposite the slide rail; an inverted V-shaped groove is provided at the bottom of the lower plate. A constraint groove is provided on one side of the slide, and a locking block is provided in the constraint groove to slide along it; helical teeth are provided on both sides of the upper locking plate, the other side of the slide, and the outside of the locking block; a spring B is also provided in the constraint groove; one end of the pull rod passes through the outside of the lower locking plate into the constraint groove, passes through the spring B, and connects to the locking block.

[0014] Furthermore, one side of the support platform of the lower support has a positioning post and a threaded hole B for installing the pipe clamp structure; wherein the positioning post is used to match the positioning hole on the pipe clamp structure, and the lower clamping plate of the pipe clamp structure is connected to the lower support by the cooperation of bolts and threaded hole B.

[0015] Furthermore, the oblique teeth on the other side of the slide and the outer side of the locking block have an oblique top surface and a flat bottom surface; the oblique teeth on both sides of the upper locking plate have a flat top surface and an oblique bottom surface.

[0016] The beneficial effects of adopting the above-mentioned optimized technical solution are as follows: Excellent hose limiting capability to prevent axial movement and wear: By setting a blocking strip on the lower surface of the upper pressure block, the hose is clearly restricted to running on one side of the blocking strip. This fundamentally prevents axial movement of the hose during operation, avoids premature wear and fatigue failure of the hose due to friction and vibration, greatly extends the service life of the hose, and improves the stability and reliability of pump operation.

[0017] Adjustable clamping force buffer protects the hose and enhances reliability: The upper clamping block is connected to the lower support via a bolt assembly with spring A. This design makes the clamping force of the upper clamping block on the hose elastic rather than rigid. Spring A provides buffering, adaptively compensating for minor deformations and wear of the hose to maintain stable clamping force. The clamping force can be easily and precisely adjusted by rotating the locating nut, ensuring a good seal while preventing over-clamping and damage to the hose, achieving optimized clamping force control.

[0018] The hose is easy and reliable to install and secure: the hose clamps on both sides of the pump head can quickly and firmly secure the inlet and outlet ends of the hose. The unique helical tooth meshing design allows the upper clamping plate to automatically lock the hose when pressed down by spring B, and it can be easily released by pulling out the lever, making operation very simple. The V-groove and inverted V-groove designs can accommodate different pipe diameters, ensuring a firm and secure clamping, and effectively preventing the hose joint from falling off during operation.

[0019] The pump head features a rational structure and convenient operation and maintenance: One end of the upper pressure block is connected via a pivot, enabling easy opening and closing, much like a lid, greatly facilitating hose installation and replacement. The lower support and hose clamp are connected via positioning posts and bolts, ensuring accurate positioning and stable installation. The entire pump head structure is compact, with clear functional modules, and simple maintenance. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of an embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the back structure of the upper pressure block in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the lower support structure according to an embodiment of the present invention.

[0023] Figure 4 for Figure 1 A schematic diagram of the side structure.

[0024] Figure 5 This is a schematic diagram of the pipe clamp structure according to an embodiment of the present utility model.

[0025] Figure 6 This is a schematic diagram of the oblique tooth structure of the upper card plate in an embodiment of this utility model.

[0026] Figure 7 This is a schematic diagram of the oblique tooth structure on the inner side of the slide and the outer side of the card block in an embodiment of this utility model.

[0027] In the diagram: 1. Rear shell, 2. Pipe clamp structure, 3. Lower support, 4. Front shell, 5. Upper pressure block, 6. Roller assembly, 7. Positioning screw, 8. Spring A, 9. Positioning nut, 10. Washer, 11. Shaft, 1-1. Threaded hole A, 5-1. Through hole, 5-2. Blocking strip, 5-3. Slot, 3-1. Support base, 3-2. Support platform, 3-2-1. Positioning screw mating mounting position, 3-2-2. Positioning post mating mounting position, 2-1. Lower clamping plate, 2-2. Pull rod, 2-3. Clamping block, 2-4. Spring, 2-5. Slide rail, 2-6. Upper clamping plate, 2-7. Helical tooth, 2-8. Positioning hole. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. This embodiment is implemented based on the technical solution of this utility model, but the protection scope of this utility model is not limited to the following embodiments.

[0029] like Figures 1 to 7 As shown, the peristaltic pump head with hose limiting provided in this embodiment is mainly composed of a front shell 4, a rear shell 1, an upper pressure block 5, a lower support 3, a roller assembly 6, and two left and right hose clamp structures 2.

[0030] Assembly relationships and structural details: The front housing 4 and the rear housing 1 are fastened together by peripheral screws (the peripheral screws pass through the support platform of the lower support), forming the main frame of the pump head. The roller assembly 6 is supported between the front housing 4 and the rear housing 1 by bearings and is driven to rotate by an external motor. The lower support 3 is fixedly installed at the bottom of the rear housing 1 by screws, and includes a long strip support base 3-1 and two support platforms 3-2 respectively standing at both ends of the support base. The upper pressure block 5 is located above the roller assembly 6, with its two ends respectively mounted on the top of the two support platforms 3-2.

[0031] One end of the upper pressure block 5 is provided with a through hole 5-1. During assembly, this through hole 5-1 is aligned with the pre-set threaded hole A 1-1 on the rear housing 1. The threaded end of a rotating shaft 11 is sequentially screwed into the through hole 5-1 of the pressure block, and finally screwed into the threaded hole A 1-1 of the rear housing and tightened. This structure allows this end of the upper pressure block 5 to rotate around the rotating shaft 11, realizing the opening and closing function of the pump head cover.

[0032] The other end of the upper pressure block 5 has a slot 5-3 that runs through its body, with an opening facing outwards towards the lower support 3. The top of the support platform 3-2 of the lower support 3 has a threaded mounting position (3-2-1). The lower end of a positioning screw 7 is threadedly fixed to this mounting position, and its upper end passes upwards through a spring A 8 and a washer 10, then extends into the slot 5-3 of the upper pressure block and protrudes from its top. A positioning nut 9 is threadedly connected to the exposed positioning screw 7. The lower surface of the washer 10 contacts the bottom surface of the slot 5-3 (i.e., the lower surface of the upper pressure block 5). By tightening or loosening the positioning nut 9, the spring A 8 can be compressed or released, thereby elastically adjusting the clamping force of the upper pressure block 5 on the lower hose. The engagement of this bolt assembly (consisting of the positioning screw 7, spring A 8, washer 10, and positioning nut 9) with the slot 5-3 allows sufficient movement of the upper pressure block 5 during opening and closing.

[0033] Core limiting and fixing structure: On the lower surface of the upper pressure block 5 facing the hose, an elongated blocking strip 5-2 is protruding along its length. During hose installation, the hose is placed and confined on the same side as this blocking strip 5-2. This structure effectively prevents the hose from axially shifting during operation.

[0034] On the outer sides of the two support platforms 3-2 on the left and right sides of the lower support 3, a pipe clamp structure 2 is installed to fix the inlet and outlet ends of the hose, respectively. Each support platform 3-2 has a positioning post mounting position (3-2-2) and a threaded hole B (not shown separately in the figure) on its outer side. The lower clamping plate 2-1 of the pipe clamp structure 2 has a corresponding positioning hole 2-8. During installation, the positioning post is first inserted into the positioning hole 2-8 for initial positioning, and then a screw is passed through the through hole on the lower clamping plate 2-1 and screwed into the threaded hole B to fasten the entire pipe clamp structure 2 to the lower support 3.

[0035] The pipe clamp structure 2 consists of a lower clamping plate 2-1, an upper clamping plate 2-6, a clamping block 2-3, a spring B 2-4, and a pull rod 2-2. After the lower clamping plate 2-1 is fixed as described above, it forms a vertical slide 2-5 with the side of the support platform 3-2, within which the upper clamping plate 2-6 can slide up and down. The inner side of the lower clamping plate 2-1 facing the slide 2-5 has a V-shaped groove 2-7-1 (located at the top, for supporting the hose) and an inverted V-shaped groove 2-7-2 (located at the bottom, for clamping the hose). One side of the slide 2-5 (near the support platform) is machined with helical teeth, the top surface of which is inclined, and the bottom surface is flat. The other side of the slide 2-5 has a constraint groove, within which a clamping block 2-3 is placed and can slide horizontally. Its outer side (facing the slide side) is also machined with helical teeth similar to those on the slide side. A spring B 2-4 is placed in the constraint groove, always applying a thrust towards the inside of the slide 2-5 to the locking block 2-3. A pull rod 2-2 passes horizontally from the outside of the lower locking plate 2-1, and its inner end is connected to the locking block 2-3. Both sides of the upper locking plate 2-6 are machined with helical teeth, but their tooth profile design is opposite to that of the helical teeth on the slide and the locking block; the top surface of the teeth is flat, and the bottom surface of the teeth is inclined.

[0036] Working principle and usage process: Replacing the hose: Pull the levers 2-2 on both sides of the hose clamp structure 2 outwards, causing the clamp block 2-3 to compress the spring B 2-4 and retract inwards, disengaging from the helical teeth on one side of the upper clamp plate 2-6. At this point, the upper clamp plate 2-6 can be lifted upwards. Loosen the positioning nut 9 and flip it upwards to open the upper pressure block 5. Take out the old hose, wrap the new hose around the roller assembly 6, and place it on the same side of the blocking strip 5-2 of the upper pressure block 5. Place both ends of the hose into the V-groove and the inverted V-groove of the lower clamp plate of the left and right hose clamp structures 2, respectively. Press the upper pressure block 5 down to the closed position.

[0037] Adjusting the clamping force: Tighten the positioning nut 9 appropriately, which compresses the spring A 8 through the washer 10, thereby applying a controllable and elastic downward pressure to the upper pressure block 5, pressing the hose against the pump head. The elastic clamping force can be adjusted adaptively to avoid overpressure damage to the hose.

[0038] Secure the hose end: For each hose clamp structure 2, place the hose end into the V-groove 2-7-1 or inverted V-groove 2-7-2 of the lower clamp plate 2-1. Then press down on the upper clamp plate 2-6. As the upper clamp plate 2-6 moves downward, the helical teeth on both sides interact with the helical teeth on the inside of the slide 2-5 and the outside of the clamp block 2-3. Due to the guiding effect of the inclined surface, the downward pressure forces the clamp block 2-3 to briefly move outward to make room, and then quickly returns to its original position under the push of the spring B 2-4, engaging and locking with the helical teeth of the upper clamp plate 2-6, thereby fixing the upper clamp plate 2-6 in the pressed position and firmly clamping the hose. This process requires no tools; locking can be completed with a single press. To release, simply pull the lever 2-2 outward to release the lock, and the upper clamp plate 2-6 can be easily lifted.

[0039] Operation: Start the pump head, and the roller assembly 6 rotates to squeeze the hose and deliver fluid. Throughout the process, the main body of the hose is confined to one side of the blocking bar 5-2 and cannot move axially; both ends are firmly fixed by the pipe clamp structure 2 and cannot be dislodged.

[0040] This invention effectively solves the problems of hose slippage, wear, and inconvenience in fixing by the synergistic effect of the blocking strip, elastic clamping mechanism, and quick-clamp structure, significantly improving the working reliability and ease of use of the peristaltic pump.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A peristaltic pump head with hose limiting, comprising a front shell (4), a rear shell (1), an upper pressure block (5), and a lower support (3); the front shell (4) and the rear shell (1) are arranged opposite to each other, and a roller assembly (6) connected to its bearing is provided between them; the upper pressure block (5) and the lower support (3) are respectively located at the top and bottom of the roller assembly (6); characterized in that, One end of the upper pressure block (5) is connected to the rear shell (1) via a rotating shaft (11), and the other end is connected to the lower support (3) via a bolt assembly; The lower surface of the upper pressure block (5) is provided with a blocking strip (5-2); the hose is installed on one side of the blocking strip (5-2).

2. A peristaltic pump head with hose limiting according to claim 1, characterized in that, One end of the upper pressure block (5) is provided with a through hole (5-1), which is directly opposite to the threaded hole A (1-1) on the rear shell (1); the threaded end of the rotating shaft (11) passes through the through hole (5-1) and is threadedly engaged with the threaded hole A (1-1).

3. A peristaltic pump head with hose limiting according to claim 1, characterized in that, The other end of the upper pressure block (5) is provided with a slot (5-3), which passes through the upper pressure block (5) and has an opening facing outward; the bolt assembly is located in the slot (5-3) and is connected to the lower support (3).

4. A peristaltic pump head with hose limiting according to claim 3, characterized in that, The bolt assembly includes a positioning nut (9), a positioning screw (7), a spring A (8), and a washer (10); the positioning screw (7) is fixed on the lower support (3) and passes through the slot (5-3) and protrudes from the top of the slot (5-3); the positioning nut (9) is threadedly connected to the positioning screw (7), and the spring A (8) and the washer (10) are both fitted on the positioning screw (7) and located between the slot (5-3) and the positioning nut (9), wherein the washer (10) abuts against the slot (5-3).

5. A peristaltic pump head with hose limiting according to claim 1, characterized in that, The lower support (3) includes a support base (3-1) and a support platform (3-2); there are two support platforms (3-2), which are respectively located at both ends of the support base (3-1); the two ends of the upper pressure block (5) are respectively located on the top of the corresponding support platform (3-2).

6. A peristaltic pump head with hose limiting according to claim 1 or 5, characterized in that, The lower support (3) is provided with pipe clamp structures (2) on both the left and right sides, namely the left pipe clamp structure and the right pipe clamp structure; the pipe clamp structure (2) includes an upper clamp plate (2-6) and a lower clamp plate (2-1). The lower plate (2-1) is installed on one side of the support platform (3-2) of the lower support (3), and a slide (2-5) is formed between the two for the upper plate (2-6) to slide up and down; a V-shaped groove (2-7-1) is provided on the lower plate (2-1) directly opposite the slide (2-5); an inverted V-shaped groove (2-7-2) is provided at the bottom of the lower plate (2-1). A constraint groove is provided on one side of the slide (2-5), and a locking block (2-3) is provided in the constraint groove to slide along it; the upper locking plate (2-6) on both sides, the other side of the slide (2-5) and the outer side of the locking block (2-3) are provided with helical teeth; a spring B (2-4) is also provided in the constraint groove; one end of the pull rod (2-2) passes through the outer side of the lower locking plate (2-1) into the constraint groove, passes through the spring B (2-4) and is connected to the locking block (2-3).

7. A peristaltic pump head with hose limiting according to claim 5, characterized in that, The lower support (3) has a positioning post and a threaded hole B on one side of the support platform (3-2) for installing the pipe clamp structure (2); wherein the positioning post is used to match the positioning hole (2-8) on the pipe clamp structure (2), and the lower clamp plate (2-1) of the pipe clamp structure (2) is connected to the lower support (3) by the cooperation of bolts and threaded hole B.

8. A peristaltic pump head with hose limiting according to claim 6, characterized in that, The oblique teeth on the other side of the slide (2-5) and the outer side of the locking block (2-3) have an oblique top surface and a flat bottom surface; the oblique teeth on both sides of the upper locking plate (2-6) have a flat top surface and an oblique bottom surface.

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