Peristaltic pump with adjustable roller assembly

Abstract

The invention discloses a peristaltic pump with an adjustable roller assembly, and relates to the technical field of peristaltic pumps, the peristaltic pump comprises a roller support and an eccentric shaft, and two ends of the eccentric shaft are respectively mounted on the roller support; the right plate of the roller support is provided with at least two clamping positions, the right end of the eccentric shaft is provided with a clamping stopper, and the clamping stopper is embedded in one of the clamping positions; the left end of the eccentric shaft is sleeved and connected with a spring, and the other end of the spring abuts against the outer side of the left plate of the roller support. The working diameter of the roller assembly can be conveniently adjusted.

Description

Technical Field

[0001] The present invention belongs to the field of peristaltic pumps, and particularly relates to a peristaltic pump with an adjustable roller assembly. Background Art

[0002] A peristaltic pump is a special positive-displacement pump, mainly used for fluid distribution or transportation, and is widely used in industries such as pharmaceuticals, food, and chemicals. When the pump head of the peristaltic pump works, the roller rotates, and a "pillow" - shaped fluid is formed in a section of the pump tube between two rollers. The fluid is pumped by alternately squeezing and releasing the elastic delivery hose of the pump; the volume of the "pillow" affects the flow rate, and the rotational speed of the roller also affects the flow rate.

[0003] Two problems of the existing roller assembly: (1) For a roller assembly with a fixed working diameter, its pressing capacity is a definite value and cannot be adjusted; (2) Regarding the problem of the service life of the hose presented by the degree of rolling of the hose by the roller assembly with a fixed working diameter, it cannot be adjusted. Summary of the Invention

[0004] The purpose of the present invention is to provide a peristaltic pump with an adjustable roller assembly to facilitate the adjustment of the working diameter of the roller assembly in view of the defects and deficiencies of the prior art.

[0005] The present invention is realized through the following technical solutions:

[0006] A peristaltic pump with an adjustable roller assembly includes a roller bracket and an eccentric shaft. The two ends of the eccentric shaft are respectively installed on the roller bracket.

[0007] At least two clamping positions are provided on the right plate of the roller bracket, and a clamping block is provided at the right end of the eccentric shaft. The clamping block is embedded in one of the clamping positions; a spring is sleeved and connected at the left end of the eccentric shaft, and the other end of the spring abuts against the outer side of the left plate of the roller bracket.

[0008] Further, the two ends of the eccentric shaft respectively penetrate through the left plate and the right plate of the roller bracket.

[0009] Further, a flat - head screw thread - connected to the left end of the eccentric shaft is provided, and the two ends of the spring respectively abut against the flat - head screw and the left plate of the roller bracket.

[0010] Further, the clamping position and the clamping block are a matching convex and concave or a matching rib - hole and prism.

[0011] Further, it further includes a roller; the roller is connected to the eccentric shaft through a bearing.

[0012] Further, the left end and the right end of the eccentric shaft are on the same central axis, deviating from the central axis of the eccentric shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] In the present invention, the eccentric shaft enables the roller to change its working diameter, so that its pressing capacity and the service life of the hose can be adjusted within a certain range. And during the adjustment, only need to press the flat head screw to make the catch of the eccentric shaft withdraw from the clamping position, turn an angle and then release the screw, and the spring will rebound to automatically reset, which is convenient for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structure diagram of the embodiment of the present invention;

[0016] Figure 2 is a simplified structure diagram of the outer side of the right plate of the rolling path support in the first embodiment;

[0017] Figure 3 is a simplified structure diagram of the outer side of the right plate of the rolling path support in the second embodiment;

[0018] Figure 4 is a simplified structure diagram of the right end of the eccentric shaft in the second embodiment;

[0019] Figure 5 is a simplified structure diagram of the right end of the eccentric shaft in the third embodiment;

[0020] Figure 6 is a schematic structural diagram of the roller assembly of the invention.

[0021] In the figure: 1-1, the left plate of the roller support; 1-2, the right plate of the roller support; 2, bearing; 3, eccentric shaft; 4, flat head screw; 5, roller; 6, spring; 7, bushing; 3-1, the right end of the eccentric shaft in the shape of a regular pentagon; 1-2-2, clamping position; 3-1-1, catch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Embodiment 1:

[0024] Referring to Figure 1 and Figure 2 , in the peristaltic pump provided in this embodiment, it includes a roller support, an eccentric shaft and a roller; the roller and the eccentric shaft are connected through a bearing; both ends of the eccentric shaft are respectively installed on the left plate and the right plate of the roller support, wherein a bushing is fixedly connected to the left plate of the roller support, and the left end of the eccentric shaft is inserted into the bushing and has a rotatable degree of freedom in the bushing;

[0025] The right end of the eccentric shaft is a pentagonal prism, and the right plate of the roller bracket is provided with a pentagonal prism hole corresponding to the pentagonal prism, and the pentagonal prism and the pentagonal prism hole are matched;

[0026] A flat head screw is installed at the left end of the eccentric shaft and is threadedly connected thereto. The diameter of the nut of the flat head screw is larger than the diameter of the left end of the eccentric shaft, which can prevent the spring sleeved on the eccentric shaft from coming off. In the normal state, the spring is in a compressed state, and both ends of the spring are respectively pressed against the flat head screw and the outside of the left plate bushing.

[0027] During adjustment, only need to press the flat head screw to make the pentagonal prism at the right end of the eccentric shaft disengage from the pentagonal prism hole of the right plate, and then rotate the eccentric shaft. After reaching the position, release the pressing, and the adjustment of the working diameter can be realized.

[0028] Embodiment 2:

[0029] The difference between this embodiment and Embodiment 1 is that the right end of the eccentric shaft in this embodiment has a retaining block perpendicular to its axis. The retaining block can be specifically referred to Figure 4 , there are four retaining blocks, which correspond to the four positions on the right plate one by one. Refer to Figure 3 , after adjustment, the retaining block is located in other positions.

[0030] Embodiment 3:

[0031] Refer to Figure 5 , the difference between this embodiment and Embodiment 2 is that there are two retaining blocks on the eccentric shaft in this embodiment and four positions on the right plate.

[0032] The working principle of this embodiment:

[0033] Specifically refer to Figure 6 , where C disclosed therein is the working diameter of the roller, and it is always the top of the roller that contacts the hose; B is the diameter of the main body of the eccentric shaft, and A is the position of the left end or the right end of the eccentric shaft. In summary, by rotating the position of the left end or the right end of the eccentric shaft, the length between A and the top of the roller can be adjusted, that is, the pressure on the hose can be adjusted.

[0034] It should be noted that the above is only a preferred application example of the present invention and is not used to limit the protection scope of the present invention. All technical solutions adopted in the form of equivalent replacement or equivalent transformation are within the protection scope of the present invention.

Claims

1. A peristaltic pump with an adjustable roller assembly, comprising a roller bracket and an eccentric shaft, wherein both ends of the eccentric shaft are respectively mounted on the roller bracket; characterized in that: The right plate of the roller bracket is provided with at least two positions, the right end of the eccentric shaft is provided with a stopper, and the stopper is embedded in one of the positions; the left end of the eccentric shaft is sleeved and connected with a spring, and the other end of the spring abuts against the outer side of the left plate of the roller bracket.

2. A peristaltic pump with an adjustable roller assembly according to claim 1, characterized in that: The two ends of the eccentric shaft respectively penetrate the left plate and the right plate of the roller bracket.

3. A peristaltic pump with an adjustable roller assembly according to claim 1, characterized in that: The left end of the eccentric shaft is provided with a flat head screw threadedly connected thereto, and the two ends of the spring are respectively abutted against the flat head screw and the left plate of the roller bracket.

4. A peristaltic pump with an adjustable roller assembly according to claim 1, characterized in that: The blocking positions and blocking portions are matching protrusions and grooves or matching prism holes and prisms.

5. The peristaltic pump with an adjustable roller assembly according to claim 1, characterized in that: It also includes a roller; the roller is connected to the eccentric shaft through a bearing.

6. A peristaltic pump with an adjustable roller assembly according to claim 1, characterized in that: The left end and the right end of the eccentric shaft are on the same central axis and deviate from the central axis of the eccentric shaft.

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