Automatic return peristaltic pump

Abstract

The utility model belongs to the technical field of fluid pumps, and particularly relates to an automatic aligning peristaltic pump which comprises a pump body, an inner cavity is arranged in the pump body, a rotor is arranged in the inner cavity, a roller is mounted on the rotor, a guide groove is arranged on the roller, the depth of the guide groove is deep in the middle and shallow on two sides, and when the rotor works, the guide groove is in direct contact with a pipeline. And the pipeline is kept in the middle of the roller. According to the automatic aligning peristaltic pump, the guide grooves are formed in the idler wheels, so that when the pipeline deviates leftwards and rightwards in the extrusion process, the pump pipe can be automatically aligned to the center position through the guide grooves, friction between the two sides of the pipeline and the pump body is avoided, and the service life of the pump pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid pumps, in particular to an automatic self-centering peristaltic pump. Background Art

[0002] In the prior art, the function of automatically adding seasonings to cooking machines is mostly achieved by peristaltic pumps. The working principle of the peristaltic pump is as follows: the motor of the peristaltic pump serves as a power source to cause the pump head to rotate. When the pump head rotates, the roller on the pump head intermittently contacts the flexible hose, that is, the roller periodically squeezes and relaxes the hose; when the hose is squeezed, the fluid in the tube flows forward under pressure to achieve fluid transportation, and when the squeezing stops, the hose elasticity recovers, its internal space increases, forming a negative pressure, attracting the fluid from the rear to enter, so that the liquid can be continuously transported forward. By adjusting the number of rotations or duration of the motor, the amount of seasoning pumped out can be accurately adjusted, thereby achieving fine control of the amount of seasoning added. However, after a period of use, the peristaltic pump's delivery pipeline (elastic hose) is prone to wear and deformation, especially the length will become longer. After the length becomes longer, the pipeline is more likely to deviate left and right (such as Figure 1-2 As shown in the figure, the left and right sides of the pipeline will be scratched against the inner wall of the pump body, thereby increasing the wear on the pipeline and further reducing the service life of the peristaltic pump pipeline. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide an automatic self-centering peristaltic pump, which can automatically guide the pipeline during use, making it difficult for the pipeline to move left and right, thereby avoiding friction between the two sides of the pipeline and the pump wall, thereby extending the service life of the pipeline.

[0004] The technical solution of the utility model is: an automatic self-centering peristaltic pump, comprising a pump body, an inner cavity is arranged inside the pump body, a rotor is arranged in the inner cavity, a roller is installed on the rotor, a guide groove is arranged on the roller, the depth of the guide groove is deep in the middle and shallow on both sides, when the rotor is working, the guide groove is in direct contact with the pipeline, and can cause the pipeline to remain in the middle of the roller.

[0005] Furthermore, the cross section of the guide groove is arc-shaped.

[0006] Furthermore, the depth of the guide groove is not greater than the diameter of the pipe, so that the pipe can be extruded.

[0007] Furthermore, the rotor includes a rotating shaft and two turntables, the two turntables are arranged in parallel and at an interval, and mounting slots are arranged on the outer peripheral edges of the turntables, and the mounting slots on the two turntables correspond to each other one by one.

[0008] Furthermore, the mounting slot is used to mount a roller shaft, and both ends of a roller shaft are respectively fixed on two turntables, and the mounted roller shaft remains parallel to the rotating axis.

[0009] Furthermore, the roller is rollingly installed between the two rotating disks via a roller shaft.

[0010] Furthermore, there are at least two installation slots, and the installation slots are evenly distributed on the circumference of the turntable.

[0011] Furthermore, there are four mounting slots.

[0012] Furthermore, the pump body includes a base and a pump casing, two ends of the rotor are movably connected to the base and the pump casing respectively, and the rotor is connected to the motor and rotates when driven by the motor.

[0013] Furthermore, the base is in the shape of a flat plate, and the pump shell is in the shape of a hemispherical shell.

[0014] Furthermore, a groove is provided on the inner wall of the housing at a position corresponding to the guide groove on the roller, and the pipe will be installed between the guide groove and the groove; the groove is arc-shaped, and the function of the groove is the same as that of the guide groove, and is also used to keep the pipe in the middle of the roller to prevent the pipe from deviating left and right and causing friction between the two sides of the pipe and the pump body. The sum of the maximum depths of the groove and the guide groove is less than the pipe diameter.

[0015] Furthermore, the depth of the groove is less than the depth of the guide groove. Since the guide groove is provided on the roller and the roller can rotate, a greater depth of the guide groove can more effectively cause the pipe to return to the middle of the roller, and the roller production cost is lower.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the automatic self-centering peristaltic pump in the utility model is provided with a guide groove on the roller, so that when the pipeline deviates to the left or right during the extrusion process, the guide groove can automatically cause the pump tube to return to the middle position of the roller, so as to avoid friction between the two sides of the pipeline and the pump body, reduce the wear of the pipeline, extend the service life of the pipeline, and reduce the number of times the peristaltic pump pipeline needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a peristaltic pump in the prior art when the hose deviates left and right after being used for a long time;

[0018] Figure 2 yes Figure 1 A magnified view of part A;

[0019] Figure 3 It is a three-dimensional schematic diagram of the peristaltic pump in Example 1 of the utility model;

[0020] Figure 4It is an explosion diagram of the peristaltic pump in Example 1 of the utility model;

[0021] Figure 5 This is a schematic diagram of the rotor in Embodiment 1 of the present utility model;

[0022] Figure 6 It is a schematic diagram of the roller in Embodiment 1 of the present utility model;

[0023] Figure 7 This is a schematic diagram of the roller and the hose working together in Example 1 of the utility model;

[0024] In the figure: 1-pump body, 11-pump casing, 12-base, 2-roller, 21-guide groove, 3-pipeline, 4-rotor, 41-rotating shaft, 42-turntable, 43-installing notch, 5-roller shaft. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art. Unless otherwise defined, all technical terms and scientific terms used in this document have the same meanings as those generally understood by technicians in this technical field.

[0026] Example 1

[0027] like Figure 3-7 As shown, this embodiment is an automatic self-aligning peristaltic pump, including a pump body 1, an inner cavity is provided inside the pump body 1, the rotor 4 is provided in the inner cavity, a roller 2 is mounted on the rotor 4, a guide groove 21 is provided on the roller 2, the depth of the guide groove 21 is deep in the middle and shallow on both sides, so that the pipe 3 can be automatically kept in the middle of the guide groove 21, that is, the middle of the roller 2. In this embodiment, the cross section of the guide groove 21 is arc-shaped, and the maximum depth of the guide groove 21 is not greater than the diameter of the pipe 3. In this way, when the rotor 4 is working, the roller 2 can effectively squeeze the pipe 3.

[0028] In this embodiment, the rotor 4 includes a rotating shaft 41 and two rotating disks 42. The two rotating disks 42 are arranged in parallel and at intervals. A mounting notch 43 is arranged on the outer peripheral edge of the rotating disk 42, and the mounting notches 43 on the two rotating disks 42 correspond to each other. The mounting notches 43 are used to install the roller shaft 5, that is, the two ends of a roller shaft 5 are respectively fixed in the mounting notches 43 on the two rotating disks 42, and the installed roller shaft 5 is kept parallel to the rotating shaft 41. The roller 2 is rollingly installed between the two rotating disks 42 through the roller shaft 5. In this embodiment, there are two mounting notches 43 on each rotating disk 42, and the mounting notches 43 are symmetrically distributed on the rotating disk 42.

[0029] In this embodiment, the pump body 1 includes a base 12 and a pump housing 11, and the two ends of the rotor 4 are movably connected to the base 12 and the pump housing 11, respectively. The rotor 4 is connected to the motor and rotates under the drive of the motor. The base 12 is flat and the pump housing 11 is hemispherical.

[0030] The automatic self-centering peristaltic pump in this embodiment is used in the same manner as the existing peristaltic pump, and has the advantage that the peristaltic pump in this embodiment is provided with a guide groove 21 on the roller 2. During operation, if the length of the pipe 3 increases due to deformation, the pipe 3 will automatically return to the center under the action of the guide groove 21, that is, the guide groove 21 can cause the pipe 3 to remain in the middle of the roller 2, thereby avoiding friction between the left and right sides of the pipe 3 and the inner wall of the shell, thereby extending the service life of the pipe 3.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that: in this embodiment, four mounting notches 43 are provided on the turntable 42 of the rotor 4, so that the rotor 4 can be installed with four rollers 2. Tests have shown that the rotor 4 with four rollers 2 is more stable and smooth when squeezing the pump tube than the rotor 4 with two rollers 2 (the rotor 4 with two rollers 2 is more likely to deviate when squeezing the pipe 3, causing scratches and damage between the pump tube and the pump head); in this embodiment, the length of the pipe 3 adopts an imported silicone tube of 116mm, the wall thickness of the pipe 3 is 3mm, and the inner diameter is 6mm. Under normal wear, it can meet the long-term use requirements of at least 1 year. After repeated tests, the 116mm length design can minimize the wear of the pump tube while meeting the requirements of capacity changes (under the same conditions, the service life of the 106mm length pump tube is only half of that of the 116mm length pump tube, and the excessive length of the pipe 3 will cause an increase in the amount of liquid, and the pipe 3 is more likely to deviate). A person skilled in the art can clearly understand the scheme of this embodiment based on the text description, so no drawings are provided.

[0033] Example 3

[0034] The difference between this embodiment and embodiment 1 is that: in this embodiment, a groove is provided at a position corresponding to the guide groove 21 on the inner wall of the pump housing 11, that is, the pipe 3 will be installed between the guide groove 21 and the groove; the groove is arc-shaped, and the function of the groove is the same as that of the guide groove 21, and it is also used to keep the pipe 3 in the middle of the roller 2 to prevent the pipe 3 from deviating left and right and causing the two sides of the pipe 3 to rub against the pump body 1; the sum of the maximum depths of the groove and the guide groove 21 is less than the diameter of the pipe 3. The depth of the groove is less than the depth of the guide groove 21, because the guide groove 21 is provided on the roller 2, and the roller 2 itself can rotate flexibly, and the depth of the guide groove 21 is designed to be larger, which can more effectively promote the pipe 3 to return to the middle of the roller 2. Those skilled in the art can clearly understand the scheme of this embodiment based on the text description, so no drawings are provided.

[0035] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have combinations and modifications of the aforementioned technical features. Without departing from the spirit and scope of the present invention, those skilled in the art may improve, modify, or replace the present invention with equivalents, or apply the structure or method of the present invention to other fields to achieve the same effect, which all fall within the scope of protection of the present invention.

Claims

1. An automatic self-aligning peristaltic pump, comprising a pump body, an inner cavity is provided inside the pump body, a rotor is provided in the inner cavity, and the characteristics are: A roller is mounted on the rotor, and a guide groove is arranged on the roller. The depth of the guide groove is deep in the middle and shallow at both sides. The guide groove is used to contact the pipeline and keep the pipeline in the middle of the roller.

2. The automatic self-centering peristaltic pump according to claim 1, characterized in that: The cross section of the guide groove is arc-shaped.

3. The automatic self-centering peristaltic pump according to claim 1, characterized in that: The depth of the guide groove is no greater than the diameter of the pipeline.

4. The automatic self-centering peristaltic pump according to claim 1, characterized in that: The rotor comprises a rotating shaft and two rotating disks, the two rotating disks are arranged in parallel and at intervals, and mounting notches are arranged on the outer peripheral edges of the rotating disks, and the mounting notches on the two rotating disks correspond to each other one by one.

5. The automatic self-centering peristaltic pump according to claim 4, characterized in that: The mounting notch is used to mount the roller shaft, and both ends of the roller shaft are respectively fixed on two turntables, and the mounted roller shaft is kept parallel to the rotating shaft.

6. The automatic self-centering peristaltic pump according to claim 5, characterized in that: The roller is rollingly installed between the two rotating disks through a roller shaft.

7. The automatic self-centering peristaltic pump according to claim 4, characterized in that: There are at least two installation slots, and the installation slots are evenly distributed on the rotating disk in a circumferential manner.

8. The automatic self-centering peristaltic pump according to claim 4, characterized in that: There are four installation slots.

9. The automatic self-centering peristaltic pump according to claim 1, characterized in that: The pump body comprises a base and a pump shell, two ends of the rotor are movably connected to the base and the pump shell respectively, the rotor is connected to the motor and rotates under the drive of the motor; the base is in the shape of a flat plate, and the pump shell is in the shape of a hemispherical shell.

10. The automatic self-centering peristaltic pump according to claim 1, characterized in that: A groove is provided in the inner wall of the shell at a position corresponding to the guide groove on the roller. The groove is arc-shaped, and the sum of the depths of the groove and the guide groove is less than the diameter of the pipeline.

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