A peristaltic pump tube bed gap adjustment device

Abstract

The present invention belongs to the technical field of fluid transmission equipment, and in particular relates to a peristaltic pump tube bed gap adjustment device, comprising: a support frame, which is U-shaped and has an opening facing downward; a primary reduction mechanism, which is movably arranged at the top inner side of the support frame; a secondary reduction mechanism, which is movably arranged inside the support frame, with the top of the secondary reduction mechanism in sliding contact with the bottom of the primary reduction mechanism, and the bottom of the secondary reduction mechanism being arranged as an arc-shaped inner concave surface; a roller mechanism, which is arranged at the bottom of the secondary reduction mechanism, and the roller mechanism is coaxially arranged with the arc-shaped inner concave surface of the secondary reduction mechanism, with a gap left between the roller mechanism and the secondary reduction mechanism; a reset mechanism, which is arranged inside the support frame and has one end fixedly connected to the support frame, and the other end of the reset mechanism is fixedly connected to the secondary reduction mechanism. The present invention can achieve high-precision adjustment, reduce pulsation, and achieve stable reset.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid transmission equipment, and in particular relates to a peristaltic pump tube bed gap adjustment device. Background Art

[0002] A peristaltic pump uses rollers to squeeze a flexible tube to transfer fluids. Its performance is highly dependent on the gap between the rollers and the tube bed. Excessively large gaps can reduce fluid transfer efficiency, while too small can damage the tube or cause the rollers to become stuck. Furthermore, peristaltic pumps typically generate pulsation during operation, a critical issue in applications requiring smooth fluid transfer.

[0003] Currently, the common peristaltic pump gap adjustment methods on the market have the following shortcomings: Insufficient adjustment accuracy: It is difficult to meet the precise adjustment requirements of tiny gaps. Poor stability: The lack of an effective reset mechanism can cause the tube bed position to deviate from the ideal state.

[0004] Therefore, it is necessary to design a peristaltic pump tube bed gap adjustment device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a peristaltic pump tube bed gap adjustment device to solve the above problems and achieve the goals of high-precision adjustment, reduced pulsation, and stable reset.

[0006] To achieve the above-mentioned objectives, the present invention provides the following solutions: A peristaltic pump tube bed gap adjustment device, comprising: a support frame, which is U-shaped and has an opening facing downward; a first-stage reduction mechanism, which is movably arranged at the top inner side of the support frame; a second-stage reduction mechanism, which is movably arranged inside the support frame, and the top end of the second-stage reduction mechanism is in sliding contact with the bottom end of the first-stage reduction mechanism, and the bottom end of the second-stage reduction mechanism is set as an arc-shaped inner concave surface; a roller mechanism, which is arranged at the bottom of the second-stage reduction mechanism, and the roller mechanism is coaxially arranged with the arc-shaped inner concave surface of the second-stage reduction mechanism, and a gap is left between the roller mechanism and the second-stage reduction mechanism; a reset mechanism, which is arranged in the support frame and has one end fixedly connected to the support frame, and the other end of the reset mechanism is fixedly connected to the second-stage reduction mechanism.

[0007] Based on a peristaltic pump tube bed gap adjustment device of the present invention, the first-stage deceleration mechanism includes a bidirectional screw, the bidirectional screw is rotatably arranged at the top inner side of the support frame, the bidirectional screw is parallel to the horizontal section of the support frame, the threads at both ends of the bidirectional screw have opposite rotation directions and are respectively threadedly connected with a first-stage deceleration block, the top of the first-stage deceleration block is slidably connected to the support frame, the bottom end of the first-stage deceleration block is provided with a first inclined surface and is in sliding contact with the top end of the second-stage deceleration mechanism, the first inclined surfaces at the bottom ends of the two first-stage deceleration blocks are inclined in opposite directions, and the end of the bidirectional screw located outside the support frame is fixedly connected with a knob.

[0008] According to the peristaltic pump tube bed gap adjustment device of the present invention, a first sliding hole is opened in the horizontal section of the support frame, and a first sliding block is fixedly connected to the top of the first-stage deceleration block, and the first sliding block is slidably set in the first sliding hole.

[0009] Based on a peristaltic pump tube bed gap adjustment device of the present invention, the secondary deceleration mechanism includes a secondary deceleration block, which is slidably arranged between the two vertical sections of the support frame, and the two ends of the top of the secondary deceleration block are respectively provided with second inclined surfaces, the second inclined surfaces correspond one-to-one to the first inclined surfaces and slide together, and the arc-shaped inner concave surface is opened at the bottom end of the secondary deceleration block.

[0010] According to a peristaltic pump tube bed gap adjustment device of the present invention, a second sliding hole is opened in the vertical section of the support frame, and the two ends of the secondary deceleration block are respectively fixedly connected with a second slider, and the second slider is slidably set in the second sliding hole.

[0011] Based on a peristaltic pump tube bed gap adjustment device of the present invention, the roller mechanism includes a central shaft, and the two ends of the central shaft are rotatably connected to fixed plates through first bearings, and a plurality of rollers are rotatably connected between the two fixed plates through a plurality of second bearings. The plurality of rollers are arranged at equal intervals along the outer edge of the fixed plate, and a gap is left between the rollers and the arc-shaped inner concave surface.

[0012] Based on a peristaltic pump tube bed gap adjustment device of the present invention, the reset mechanism includes a positioning screw, the positioning screw is fixedly connected to the support frame, the positioning screw is fixedly connected to one end of the reset spring, the other end of the reset spring is fixedly connected to a connecting screw, and the connecting screw is fixedly connected to the second slider.

[0013] Compared with the existing technology, the present invention has the following advantages and technical effects: High-precision adjustment: Through the two-stage reduction mechanism, the total reduction ratio is ≥60, which can achieve precise adjustment of small gaps and meet the gap requirements of different hoses. Enhanced stability: The design of the reset mechanism ensures that the position of the tube bed always remains stable, avoiding deviations caused by external interference. Wide range of applications: Suitable for hoses of different materials and diameters, which improves the versatility and applicability of the peristaltic pump. Simple and reliable structure: The combined design of the two-stage reduction mechanism and the reset mechanism is compact and easy to manufacture and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is an overall schematic diagram of the present invention.

[0016] Figure 2 It is a bottom schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the primary reduction mechanism and the secondary reduction mechanism of the present invention.

[0018] Among them, 1. Support frame; 2. First-stage speed reduction block; 3. Second-stage speed reduction block; 4. Bidirectional screw; 5. Knob; 6. Center shaft; 7. First bearing; 8. Fixed plate; 9. Second bearing; 10. Roller; 11. First sliding hole; 12. Second sliding hole; 13. First slider; 14. Second slider; 15. Positioning screw; 16. Return spring; 17. Connecting screw. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 3As shown, the present invention provides a peristaltic pump tube bed gap adjustment device, comprising: a support frame 1, which is U-shaped and has an opening facing downward; a first-stage reduction mechanism, which is movably arranged at the top inner side of the support frame 1; a second-stage reduction mechanism, which is movably arranged inside the support frame 1, and the top end of the second-stage reduction mechanism is in sliding contact with the bottom end of the first-stage reduction mechanism, and the bottom end of the second-stage reduction mechanism is arranged as an arc-shaped inner concave surface; a roller mechanism, which is arranged at the bottom of the second-stage reduction mechanism, and the roller mechanism is coaxially arranged with the arc-shaped inner concave surface of the second-stage reduction mechanism, and a gap is left between the roller mechanism and the second-stage reduction mechanism; a reset mechanism, which is arranged in the support frame 1 and one end is fixedly connected to the support frame 1, and the other end of the reset mechanism is fixedly connected to the second-stage reduction mechanism.

[0022] Furthermore, the first-stage reduction mechanism includes a bidirectional screw 4, which is rotatably arranged at the top inner side of the support frame 1, and the bidirectional screw 4 is parallel to the horizontal section of the support frame 1. The threads at both ends of the bidirectional screw 4 rotate in opposite directions and are respectively threadedly connected to a first-stage reduction block 2. The top of the first-stage reduction block 2 is slidingly connected to the support frame 1, and the bottom end of the first-stage reduction block 2 is provided with a first inclined surface and is in sliding contact with the top end of the second-stage reduction mechanism. The first inclined surfaces at the bottom ends of the two first-stage reduction blocks 2 are inclined in opposite directions, and the end of the bidirectional screw 4 located outside the support frame 1 is fixedly connected to a knob 5.

[0023] Furthermore, a first sliding hole 11 is opened in the horizontal section of the support frame 1 , and a first sliding block 13 is fixedly connected to the top of the first-stage deceleration block 2 , and the first sliding block 13 is slidably set in the first sliding hole 11 .

[0024] Furthermore, the secondary deceleration mechanism includes a secondary deceleration block 3, which is slidably arranged between the two vertical sections of the support frame 1. Second inclined surfaces are respectively provided at both ends of the top of the secondary deceleration block 3. The second inclined surfaces correspond one-to-one to the first inclined surfaces and slide together. The arc-shaped concave surface is opened at the bottom end of the secondary deceleration block 3.

[0025] The larger horizontal displacement of the input is converted into a smaller vertical displacement of the secondary deceleration block 3 through the horizontal sliding of the primary deceleration block 2, thereby achieving deceleration. The angular displacement of the input is converted into a smaller vertical displacement of the secondary deceleration block 3 through the rotational movement of the bidirectional screw 4, thereby achieving further deceleration. The knob 5 can be driven manually or electrically.

[0026] The total reduction ratio of the two-stage reduction mechanism is R 总 =R 一级 ×R 二级 , thus achieving high-precision gap adjustment.

[0027] Furthermore, a second sliding hole 12 is opened in the vertical section of the support frame 1 , and second sliding blocks 14 are fixedly connected to both ends of the secondary deceleration block 3 , and the second sliding blocks 14 are slidably set in the second sliding hole 12 .

[0028] Furthermore, the roller mechanism includes a central shaft 6, and both ends of the central shaft 6 are rotatably connected to fixed plates 8 through first bearings 7. A number of rollers 10 are rotatably connected between the two fixed plates 8 through a number of second bearings 9. The number of rollers 10 are circumferentially arranged at equal intervals along the outer edge of the fixed plate 8, and a gap is left between the rollers 10 and the arc-shaped inner concave surface.

[0029] Furthermore, the reset mechanism includes a positioning screw 15, which is fixedly connected to the support frame 1, and the positioning screw 15 is fixedly connected to one end of a reset spring 16, and the other end of the reset spring 16 is fixedly connected to a connecting screw 17, and the connecting screw 17 is fixedly connected to the second slider 14.

[0030] The return spring 16 is used to ensure that the pipe bed is always in the appropriate position. The elastic coefficient and preload of the return spring 16 can be adjusted according to actual needs to adapt to the characteristics of different hoses.

[0031] Experimental example: A single-channel tube bed gap adjustment device based on a two-stage reduction mechanism is adopted. The specific parameters are as follows: Regarding the setting of the reduction ratio: the first-stage reduction mechanism is realized by the first-stage reduction block 2 and the second-stage reduction block 3. The left and right movement of the first-stage reduction block 2 is converted into the up and down movement of the second-stage reduction block 3, which can push the tube bed to produce a certain vertical displacement.

[0032] The secondary reduction mechanism is realized by manually rotating the bidirectional screw 4. Considering the convenience of manual operation, each rotation of 18° is within the easy operation range, so the secondary reduction ratio is set to 1:20.

[0033] Total reduction ratio: ≥1:60, return spring 16: elastic coefficient is 3N / mm, preload force is 6N.

[0034] Operation steps: Target gap setting: Calculate the target gap d based on the mathematical model. Assuming the hose diameter is D1mm, the target gap is 0.65×D1mm.

[0035] Input drive: Knob 5 drives the input end of the first-stage reduction block 2, generating a preliminary vertical displacement. Assuming a vertical movement of 0.02 mm, the lateral displacement of the first-stage reduction block 2 is 0.06 mm after passing through the first-stage reduction mechanism. Secondary reduction: The horizontal displacement of the first-stage reduction block 2 is further reduced by the bidirectional screw 4, which rotates approximately 29°.

[0036] Function of the return spring 16: The return spring 16 provides stable support during the adjustment process to ensure that the position of the tube bed will not deviate due to external interference.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A peristaltic pump tube bed gap adjustment device, characterized in that: include: The support frame (1) is U-shaped and has an opening facing downwards; A first-stage speed reduction mechanism, movably arranged on the top inner side of the support frame (1); A secondary reduction mechanism is movably arranged inside the support frame (1), wherein the top end of the secondary reduction mechanism is in sliding contact with the bottom end of the primary reduction mechanism, and the bottom end of the secondary reduction mechanism is arranged as an arc-shaped inner concave surface; A roller mechanism is provided at the bottom of the secondary reduction mechanism, the roller mechanism and the arc-shaped inner concave surface of the secondary reduction mechanism are coaxially arranged, and a gap is left between the roller mechanism and the secondary reduction mechanism; A reset mechanism is arranged in the support frame (1) and one end of the reset mechanism is fixedly connected to the support frame (1), and the other end of the reset mechanism is fixedly connected to the secondary reduction mechanism; The first-stage reduction mechanism includes a bidirectional screw (4), the bidirectional screw (4) is rotatably arranged at the top inner side of the support frame (1), the bidirectional screw (4) is parallel to the horizontal section of the support frame (1), the threads at both ends of the bidirectional screw (4) are in opposite directions and are respectively threadedly connected to a first-stage reduction block (2), the top end of the first-stage reduction block (2) is slidably connected to the support frame (1), the bottom end of the first-stage reduction block (2) is provided with a first inclined surface and is in sliding contact with the top end of the second-stage reduction mechanism, the first inclined surfaces at the bottom ends of the two first-stage reduction blocks (2) are inclined in opposite directions, and one end of the bidirectional screw (4) located outside the support frame (1) is fixedly connected to a knob (5); A first sliding hole (11) is provided in the horizontal section of the support frame (1), a first sliding block (13) is fixedly connected to the top end of the first-stage deceleration block (2), and the first sliding block (13) is slidably disposed in the first sliding hole (11); The secondary deceleration mechanism comprises a secondary deceleration block (3), the secondary deceleration block (3) being slidably arranged between the two vertical sections of the support frame (1), the two ends of the top of the secondary deceleration block (3) being respectively provided with a second inclined surface, the second inclined surface corresponding to the first inclined surface one by one and slidingly matched, and the arc-shaped inner concave surface being provided at the bottom end of the secondary deceleration block (3); A second sliding hole (12) is provided in the vertical section of the support frame (1), and second sliding blocks (14) are fixedly connected to both ends of the secondary deceleration block (3), respectively. The second sliding blocks (14) are slidably arranged in the second sliding hole (12).

2. The peristaltic pump tube bed gap adjustment device according to claim 1, characterized in that: The roller mechanism comprises a central shaft (6), both ends of the central shaft (6) are rotatably connected to fixed disks (8) via first bearings (7), a plurality of rollers (10) are rotatably connected between the two fixed disks (8) via a plurality of second bearings (9), and the plurality of rollers (10) are equidistantly arranged along the circumference of the outer edge of the fixed disk (8), with a gap being left between the rollers (10) and the arc-shaped inner concave surface.

3. The peristaltic pump tube bed gap adjustment device according to claim 1, characterized in that: The reset mechanism comprises a positioning screw (15), wherein the positioning screw (15) is fixedly connected to the support frame (1), the positioning screw (15) is fixedly connected to one end of a reset spring (16), the other end of the reset spring (16) is fixedly connected to a connecting screw (17), and the connecting screw (17) is fixedly connected to the second slider (14).

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