Peristaltic pump tube bed gap adjusting device

Abstract

The invention belongs to the technical field of fluid transmission equipment, and particularly relates to a peristaltic pump tube bed gap adjusting device which comprises a U-shaped supporting frame with a downward opening; the first-stage speed reducing mechanism is movably arranged at the top of the inner side of the supporting frame; the second-stage speed reducing mechanism is movably arranged in the supporting frame, the top end of the second-stage speed reducing mechanism is in sliding contact with the bottom end of the first-stage speed reducing mechanism, and the bottom end of the second-stage speed reducing mechanism is arranged to be an arc-shaped inwards-concave surface; the roller mechanism is arranged at the bottom of the second-stage speed reducing mechanism, the roller mechanism and the arc-shaped inner concave surface of the second-stage speed reducing mechanism are coaxially arranged, and a gap is reserved between the roller mechanism and the second-stage speed reducing mechanism; the reset mechanism is arranged in the supporting frame, one end of the reset mechanism is fixedly connected with the supporting frame, and the other end of the reset mechanism is fixedly connected with the second-stage speed reduction mechanism. According to the invention, high-precision adjustment can be realized, pulsation is reduced, and stable resetting is realized.

Description

Technical Field

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

[0002] A peristaltic pump is a device that realizes fluid transmission by means of rollers squeezing a hose. Its working performance highly depends on the gap between the rollers and the tube bed. An excessive gap may lead to a reduction in fluid transmission efficiency, while a too small gap may damage the hose or cause the rollers to jam. In addition, the peristaltic pump usually generates a certain pulsation during operation, which is an urgent problem to be solved in applications with high requirements for fluid transmission smoothness.

[0003] Currently, the common peristaltic pump gap adjustment methods on the market have the following deficiencies: insufficient adjustment accuracy: it is difficult to meet the precise adjustment requirements for tiny gaps; poor stability: lacking an effective reset mechanism, which will cause the position of the tube bed 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 purposes of high-precision adjustment, reducing pulsation, and being able to stably reset.

[0006] To achieve the above purpose, the present invention provides the following solution: a peristaltic pump tube bed gap adjustment device, comprising: a support frame, which is U-shaped and open downward; a primary reduction mechanism, movably arranged at the inner top of the support frame; a secondary reduction mechanism, movably arranged inside the support frame, 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 provided with an arc-shaped concave surface; a roller mechanism, arranged at the bottom of the secondary reduction mechanism, the roller mechanism is coaxially arranged with the arc-shaped concave surface of the secondary reduction mechanism, and there is a gap between the roller mechanism and the secondary reduction mechanism; a reset mechanism, arranged inside the support frame and one end of which is fixedly connected to the support frame, and the other end of the reset mechanism is fixedly connected to the secondary reduction mechanism.

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

[0008] A peristaltic pump tube bed gap adjustment device based on the present invention, a first sliding hole is formed in the horizontal section of the support frame, the top end of the first-stage deceleration block is fixedly connected with a first sliding block, and the first sliding block is slidably arranged in the first sliding hole.

[0009] A peristaltic pump tube bed gap adjustment device based on the present invention, the second-stage deceleration mechanism includes a second-stage deceleration block, the second-stage deceleration block is slidably arranged between the two vertical sections of the support frame, the two ends of the top end of the second-stage deceleration block are respectively provided with second inclined surfaces, the second inclined surfaces correspond to the first inclined surfaces one by one and are in sliding fit, and an arc-shaped concave surface is formed at the bottom end of the second-stage deceleration block.

[0010] A peristaltic pump tube bed gap adjustment device based on the present invention, second sliding holes are formed in the vertical sections of the support frame, the two ends of the second-stage deceleration block are respectively fixedly connected with second sliding blocks, and the second sliding blocks are slidably arranged in the second sliding holes.

[0011] A peristaltic pump tube bed gap adjustment device based on the present invention, the roller mechanism includes a central shaft, both ends of the central shaft are respectively rotatably connected with fixed disks through first bearings, a plurality of rollers are rotatably connected between the two fixed disks through a plurality of second bearings, the plurality of rollers are circumferentially arranged at equal intervals along the outer edge of the fixed disk, and a gap is left between the rollers and the arc-shaped concave surface.

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

[0013] Compared with the prior art, the present invention has the following advantages and technical effects: High-precision adjustment: Through a two-stage reduction mechanism with a total reduction ratio ≥ 60, precise adjustment of minute gaps can be achieved to meet the gap requirements of different hoses. Enhanced stability: The design of the reset mechanism ensures that the position of the pipe bed always remains stable, avoiding deviations caused by external interference. Wide application range: Applicable to hoses of different materials and diameters, improving 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, easy to manufacture and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the whole of the present invention.

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

[0017] Figure 3 It is a schematic diagram of the first-stage reduction mechanism and the second-stage reduction mechanism of the present invention.

[0018] Among them, 1, support frame; 2, first-stage reduction block; 3, second-stage reduction block; 4, bidirectional screw; 5, knob; 6, central shaft; 7, first bearing; 8, fixed disk; 9, second bearing; 10, roller; 11, first sliding hole; 12, second sliding hole; 13, first slider; 14, second slider; 15, positioning screw; 16, reset spring; 17, connecting screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0020] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0021] Refer to Figures 1 to 3As shown in the figure, 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 downwards; a first-stage deceleration mechanism, which is movably arranged at the inner top of the support frame 1; a second-stage deceleration mechanism, which is movably arranged inside the support frame 1, the top end of the second-stage deceleration mechanism is in sliding contact with the bottom end of the first-stage deceleration mechanism, and the bottom end of the second-stage deceleration mechanism is provided with an arc-shaped concave surface; a roller mechanism, which is arranged at the bottom of the second-stage deceleration mechanism, the roller mechanism is coaxially arranged with the arc-shaped concave surface of the second-stage deceleration mechanism, and a gap is left between the roller mechanism and the second-stage deceleration mechanism; a reset mechanism, which is arranged inside the support frame 1 and one end of which is fixedly connected to the support frame 1, and the other end of the reset mechanism is fixedly connected to the second-stage deceleration mechanism.

[0022] Further, the first-stage deceleration mechanism includes a bidirectional screw 4, the bidirectional screw 4 is rotatably arranged at the inner top of the support frame 1, the bidirectional screw 4 is parallel to the horizontal section of the support frame 1, the thread directions at both ends of the bidirectional screw 4 are opposite and are respectively threadedly connected with first-stage deceleration blocks 2, the top ends of the first-stage deceleration blocks 2 are slidably connected to the support frame 1, the bottom ends of the first-stage deceleration blocks 2 are provided with first inclined surfaces and are in sliding contact with the top ends of the second-stage deceleration mechanism, the first inclined surfaces at the bottom ends of the two first-stage deceleration blocks 2 are inclined in opposite directions, and one end of the bidirectional screw 4 located outside the support frame 1 is fixedly connected with a knob 5.

[0023] Further, a first sliding hole 11 is formed in the horizontal section of the support frame 1, and a first slider 13 is fixedly connected to the top end of the first-stage deceleration block 2, and the first slider 13 is slidably arranged in the first sliding hole 11.

[0024] Further, the second-stage deceleration mechanism includes a second-stage deceleration block 3, the second-stage deceleration block 3 is slidably arranged between the two vertical sections of the support frame 1, both ends of the top end of the second-stage deceleration block 3 are provided with second inclined surfaces, the second inclined surfaces correspond to the first inclined surfaces one by one and are in sliding fit, and the arc-shaped concave surface is formed at the bottom end of the second-stage deceleration block 3.

[0025] The larger horizontal displacement input is converted into a smaller vertical displacement of the second-stage deceleration block 3 through the horizontal sliding of the first-stage deceleration block 2 to achieve deceleration, and the angular displacement input is converted into a smaller vertical displacement of the second-stage deceleration block 3 through the rotational movement of the bidirectional screw 4 to achieve further deceleration. The knob 5 can be driven manually or electrically.

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

[0027] Further, a second sliding hole 12 is formed in the vertical section of the support frame 1, and second sliders 14 are respectively fixedly connected to both ends of the second-stage deceleration block 3, and the second sliders 14 are slidably arranged in the second sliding hole 12.

[0028] Further, the roller mechanism includes a central shaft 6. Both ends of the central shaft 6 are rotatably connected to fixed disks 8 through first bearings 7. Between the two fixed disks 8, a number of rollers 10 are rotatably connected through a number of second bearings 9. The number of rollers 10 are circumferentially and equally spaced along the outer edge of the fixed disk 8, and there is a gap between the rollers 10 and the arc-shaped concave surface.

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

[0030] The reset spring 16 is used to ensure that the tube bed is always in a proper position. The elastic coefficient and pre-tightening force of the reset spring 16 can be adjusted according to actual requirements to adapt to the characteristics of different hoses.

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

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

[0033] Total reduction ratio: ≥1:60, reset spring 16: elastic coefficient is 3 N / mm, pre-tightening force is 6 N.

[0034] Operation steps: Target gap setting: Calculate the target gap d according to the mathematical model. Assume the diameter of the hose is D1 mm, and the target gap is 0.65×D1 mm.

[0035] Input end drive: Drive the input end of the first-stage deceleration block 2 through the knob 5 to generate a preliminary vertical displacement. Assume that a vertical movement of 0.02 mm is required, then after passing through the first-stage deceleration mechanism, the lateral displacement of the first-stage deceleration block 2 is 0.06 mm. Second-stage deceleration: The horizontal displacement of the first-stage deceleration block 2 is further decelerated through the bidirectional screw 4, and the rotation angle of the bidirectional screw 4 is about 29°.

[0036] Function of the reset spring 16: The reset 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 orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the 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 operate in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0038] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A peristaltic pump tube bed gap adjustment device, characterized in that Comprising: A support frame (1), which is U-shaped and has an opening facing downwards; A first-stage deceleration mechanism, which is movably arranged at the inner top of the support frame (1); A second-stage deceleration mechanism, which is movably arranged inside the support frame (1), the top end of the second-stage deceleration mechanism is in sliding contact with the bottom end of the first-stage deceleration mechanism, and the bottom end of the second-stage deceleration mechanism is provided with an arc-shaped concave surface; A roller mechanism, which is arranged at the bottom of the second-stage deceleration mechanism, the roller mechanism is coaxially arranged with the arc-shaped concave surface of the second-stage deceleration mechanism, and there is a gap between the roller mechanism and the second-stage deceleration mechanism; A reset mechanism, which is arranged inside 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 deceleration mechanism.

2. The peristaltic pump tube bed gap adjustment device according to claim 1, wherein The first-stage deceleration mechanism includes a bidirectional screw (4), the bidirectional screw (4) is rotatably arranged at the inner top of the support frame (1), the bidirectional screw (4) is parallel to the horizontal section of the support frame (1), the thread directions at both ends of the bidirectional screw (4) are opposite and are respectively threadedly connected with first-stage deceleration blocks (2), the top ends of the first-stage deceleration blocks (2) are slidably connected to the support frame (1), the bottom ends of the first-stage deceleration blocks (2) are provided with first inclined surfaces and are in sliding contact with the top ends of the second-stage deceleration mechanism, the first inclined surfaces at the bottom ends of the two first-stage deceleration blocks (2) are inclined in opposite directions, and one end of the bidirectional screw (4) located outside the support frame (1) is fixedly connected with a knob (5).

3. The peristaltic pump tube bed gap adjustment device according to claim 2, wherein, A first sliding hole (11) is formed in the horizontal section of the support frame (1), and 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 arranged in the first sliding hole (11).

4. A peristaltic pump tube bed gap adjustment device according to claim 2, characterized in that, The second-stage deceleration mechanism includes a second-stage deceleration block (3), the second-stage deceleration block (3) is slidably arranged between the two vertical sections of the support frame (1), the two ends of the top end of the second-stage deceleration block (3) are respectively provided with second inclined surfaces, the second inclined surfaces correspond to the first inclined surfaces one by one and are in sliding fit, and the arc-shaped concave surface is formed at the bottom end of the second-stage deceleration block (3).

5. The peristaltic pump tube bed clearance adjusting device according to claim 4, characterized in that, Second sliding holes (12) are formed in the vertical sections of the support frame (1), and second sliding blocks (14) are respectively fixedly connected to both ends of the second-stage deceleration block (3), and the second sliding blocks (14) are slidably arranged in the second sliding holes (12).

6. The peristaltic pump tube bed gap adjustment device according to claim 4, characterized in that, The roller mechanism includes a central shaft (6), both ends of the central shaft (6) are rotatably connected with fixed disks (8) through first bearings (7), and a plurality of rollers (10) are rotatably connected between the two fixed disks (8) through a plurality of second bearings (9), the plurality of rollers (10) are circumferentially arranged at equal intervals along the outer edge of the fixed disk (8), and there is a gap between the roller (10) and the arc-shaped concave surface.

7. A peristaltic pump tube bed gap adjustment device according to claim 5, characterized in that, The reset mechanism includes a positioning screw (15), the positioning screw (15) is fixedly connected to the support frame (1), one end of a reset spring (16) is fixedly connected to the positioning screw (15), the other end of the reset spring (16) is fixedly connected to a connection screw (17), and the connection screw (17) is fixedly connected to the second slider (14).

Images