WO2021217704A1

WO2021217704A1 - Peristaltic pump for flow control based on hall sensor

Info

Publication number: WO2021217704A1
Application number: PCT/CN2020/089462
Authority: WO
Inventors: 熊颖申; 王金良; 崔强
Original assignee: 深圳华星恒泰泵阀有限公司
Priority date: 2020-04-30
Filing date: 2020-05-09
Publication date: 2021-11-04
Also published as: CN213205936U

Abstract

A peristaltic pump for flow control based on a Hall sensor (8), comprising a motor (1), a motor support (11), a gear ring (2), an inner gear (21), a gear support (3), a driven gear (42), a driving gear (41), a pump cover (5), a roller support (6), and a plurality of rollers (60). A hose (7) is provided in the pump cover (5) and extends along the inner wall thereof; an outlet end and an inlet end of the hose (7) both extend out of the pump cover (5) from the side of the pump cover (5); the outer walls of the rollers (60) press against the side wall of the hose (7) and can force the hose (7) to be elastically deformed; the Hall sensor (8) is fixedly provided on the pump cover (5); and magnets (9) used in conjunction with the Hall sensor (8) are provided on the roller support (6).

Description

A peristaltic pump based on Hall sensor to control flow

Technical field

The utility model relates to a pump body, in particular to a peristaltic pump based on a Hall sensor to control flow.

Background technique

A peristaltic pump is a pump body that conveys fluid by alternately squeezing and releasing an elastic conveying hose. It is used in many production and life fields. Due to limitations in structure or design, existing peristaltic pumps generally have technical defects such as complex structure, difficulty in assembly and production, low production efficiency, high implementation cost, poor stability and reliability.

In addition, the detection and control of the rotation speed and flow rate of the existing peristaltic pump are difficult in application, and additional detection and control devices are needed to realize this function, and the accuracy of flow control is poor, the implementation cost is high, and the application is not convenient enough. , Which seriously reduces the user experience.

For this reason, the purpose of the present invention is to provide a new technical solution to solve the existing technical defects.

Utility model content

In order to overcome the shortcomings of the prior art, this utility model provides a peristaltic pump based on Hall sensor flow control, which solves the technical defects of the existing peristaltic pumps such as complex structure, high implementation cost, difficulty in speed and flow control, and low flow control accuracy. .

The technical solutions adopted by the utility model to solve its technical problems are:

A peristaltic pump based on a Hall sensor to control flow, comprising a motor and a motor support fixed to each other. The upper part of the motor support is provided with a ring gear, the ring gear has internal teeth, and a radially rotatable gear is arranged inside the gear ring A support, a driven gear is arranged between the gear support and the motor support, the motor is a dual output shaft motor, the first output shaft of the motor passes through the motor support and extends into the ring gear, the first output of the motor The part of the shaft extending into the ring gear is fixedly provided with a driving gear, the driving gear and the driven gear mesh with each other, the driven gear meshes with the internal teeth of the ring gear, and the upper part of the ring gear is provided with A pump cover with an internal cavity, a roller support is arranged in the internal cavity of the pump cover, the bottom of the roller support is connected with the gear support, a number of rollers are provided on the roller support, and the inner edge of the pump cover A hose extends from its inner wall. The outlet and inlet ends of the hose extend from the side of the pump cover to the outside of the pump cover. The outer wall of the roller presses against the side wall of the hose and can force the hose to deform elastically. A Hall sensor is fixedly arranged on the pump cover, and a magnet used with the Hall sensor is arranged on the roller bracket.

As an improvement to the above technical solution, the pump cover extends upward with a sensor mounting bracket, the Hall sensor is detachably mounted on the sensor mounting bracket, the sensor mounting bracket mouth has a sensor elastic buckle, and the sensor mounting bracket is connected to the sensor mounting bracket. There are through slots between the insides of the pump cover, the roller bracket has four magnets installed, and the four magnets are arranged alternately with N/S poles, and the roller bracket is provided with magnet installation slots for installing the magnets.

As a further improvement of the above technical solution, the driven gear has three, and the driving gear and the three driven gears together form a planetary gear set;

The gear bracket extends downwardly with a driven gear mounting shaft, and the driven gear is arranged on the driven gear mounting shaft;

The roller bracket is provided with a roller mounting shaft, the roller is mounted on the roller mounting shaft, the roller has four, and the roller mounting shaft has four.

As a further improvement of the above technical solution, the roller support includes a support upper plate, a roller support lower plate, and a roller support intermediate connecting shaft and a roller support intermediate connecting plate connected between the roller support upper plate and the roller support lower plate. The two ends of the roller mounting shaft are respectively mounted on the upper plate of the roller support and the lower plate of the roller support.

As a further improvement of the above technical solution, the upper part of the gear bracket extends upwards with gear bracket clamping teeth, the lower part of the roller bracket extends downwards with roller bracket clamping teeth and a roller bracket positioning cylinder, the gear bracket clamping teeth and the The teeth of the roller bracket mesh with each other, and the inner side wall of the teeth of the gear bracket abuts against the outer side wall of the roller bracket positioning cylinder.

As a further improvement of the above technical solution, an internal partition is provided between the gear support and the roller support, a middle through hole of the partition is provided in the middle of the internal partition, and the gear support and the roller support are locked. The outer walls of the through holes passing through the middle of the partition and the gear bracket teeth and the outer walls of the roller bracket teeth abut against the inner side walls of the middle through holes of the partition, and the middle partition and the gear ring are integrally formed.

As a further improvement of the above technical solution, the outer side wall of the ring gear is provided with a ring gear fastening portion, and the pump cover side is provided with a pump cover elastic buckle used in conjunction with the ring gear fastening portion, and The pump cover is elastically buckled on the ring gear fastening part and the pump cover and the ring gear are fixedly connected to each other.

As a further improvement of the above technical solution, the upper part of the gear ring has a positioning concave ring, and the lower part of the pump cover has a positioning convex rib for use with the positioning concave ring. The positioning convex rib is inserted into the positioning concave ring and makes the pump The cover and the ring gear are mutually positioned.

As a further improvement of the above technical solution, an inner shaft of the pump cover extends downward from the upper wall surface of the inner upper wall of the pump cover, the middle position of the roller bracket has a center hole of the roller bracket, and the inner shaft of the pump cover is inserted into the center hole of the roller bracket In the middle, the roller bracket can rotate around the inner shaft of the pump cover.

As a further improvement of the above technical solution, the pump cover is provided with two inlet and outlet slots, and the hose extends from one of the inlet and outlet slots into the pump cover and extends along the inner wall of the pump cover and further enters and exits from the other. The through groove extends to the outside of the pump cover; the motor is fixedly connected to the motor support through a first connecting screw, and the sensor support and the gear ring are fixedly connected to the motor support through a second screw.

The beneficial effects of the utility model are: the utility model provides a peristaltic pump based on Hall sensor control flow. This peristaltic pump based on Hall sensor control flow has the advantages of simple structure, stable and reliable performance. When applied, The hall sensor can be matched with the speed of the magnet induction motor, and then the flow parameters of the pump can be converted. Finally, the purpose of accurately controlling the flow of the peristaltic pump can be realized, and it has the advantages of low implementation cost and high control accuracy.

In summary, this peristaltic pump based on Hall sensor flow control solves the technical defects of the existing peristaltic pumps, such as complex structure, high implementation cost, difficult speed and flow control, and low flow control accuracy.

Description of the drawings

The present utility model will be further described below in conjunction with the drawings and embodiments.

Figure 1 is a schematic diagram of the assembly of the utility model;

Figure 2 is an assembly schematic view of the utility model from another angle;

Figure 3 is a cross-sectional view in the direction of A-A in Figure 2;

Figure 4 is a schematic diagram of the structure of the gear bracket of the present invention;

Figure 5 is a schematic diagram of the structure of the roller bracket of the present invention;

Figure 6 is a schematic diagram of another structure of the roller bracket of the present invention;

Figure 7 is a schematic diagram of the assembly of the roller bracket in the utility model after the rollers and magnets are installed;

Figure 8 is a schematic diagram of the structure of the ring gear in the present utility model;

Figure 9 is a schematic view of the structure of the ring gear of the present invention from another angle;

Figure 10 is a schematic diagram of the structure of the pump cover of the present utility model;

Figure 11 is a schematic structural view of the pump cover of the present invention from another angle.

Detailed ways

In the following, the concept, specific structure and technical effects of the present utility model will be clearly and completely described in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative work, All belong to the scope of protection of the utility model. In addition, all the connection/connection relationships involved in the patent do not only refer to the direct connection of the components, but rather refer to the fact that a better connection structure can be formed by adding or reducing the connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interactively on the premise of not contradicting each other, refer to Figure 1-11.

A peristaltic pump based on a Hall sensor to control flow, comprising a motor 1 and a motor bracket 11 fixed to each other. The upper part of the motor bracket 11 is provided with a ring gear 2, the ring gear 2 has internal teeth 21, and the ring gear 2 is arranged inside There is a radially rotatable gear bracket 3, a driven gear 42 is arranged between the gear bracket 3 and the motor bracket 11, the motor 1 is a dual output shaft motor, and the first output shaft of the motor 1 passes through the motor bracket 11 and extend into the inside of the ring gear 2. The part of the first output shaft of the motor 1 extending into the inside of the ring gear 2 is fixedly provided with a driving gear 41. The driving gear 41 and the driven gear 42 mesh with each other. The movable gear 42 meshes with the internal teeth 21 of the ring gear 2, and the upper part of the ring gear 2 is provided with a pump cover 5 having an internal cavity, and the internal cavity of the pump cover 5 is provided with a roller bracket 6, so The bottom of the roller support 6 is connected to the gear support 3, and a number of rollers 60 are provided on the roller support 6, and a hose 7 extends along the inner wall of the pump cover 5. The outlet end of the hose 7 and The inlet ends all extend from the side of the pump cover 5 to the outside of the pump cover 5. The outer wall of the roller 60 presses against the side wall of the hose 7 and can force the hose 7 to be elastically deformed. The bottom of the motor bracket 11 is connected with a sensor bracket 8. The end of the hose 7 extending to the outside of the pump cover 6 is connected with a hose connector 71, the pump cover 5 is fixedly provided with a Hall sensor 8, and the roller bracket 6 is provided with a matching Hall sensor 8 Used magnet 9.

Preferably, the pump cover 5 has a sensor mounting bracket 53 extending upward, the Hall sensor 8 is detachably mounted on the sensor mounting bracket 53, and the sensor mounting bracket 53 has a sensor elastic buckle 54 at its mouth. There is a through groove 55 between the bracket 53 and the inside of the pump cover 5. The roller bracket 6 has four magnets 9 installed, and the four magnets 9 are arranged alternately with N/S poles. The roller bracket 6 is provided with magnets for mounting. 9 of the magnet mounting slot 67.

Preferably, the driven gear 42 has three, and the driving gear 41 and the three driven gears 42 together form a planetary gear set;

The gear bracket 3 extends downwardly with a driven gear mounting shaft 31, and the driven gear 42 is arranged on the driven gear mounting shaft 31;

The roller bracket 6 is provided with a roller mounting shaft 61, the roller 60 is mounted on the roller mounting shaft 61, the roller 60 has four, and the roller mounting shaft 61 has four.

Preferably, the roller support 6 includes a support upper plate 62, a roller support lower plate 63, and a roller support intermediate connecting shaft 64 and a roller support intermediate connecting plate 65 connected between the roller support upper plate 62 and the roller support lower plate 63, The two ends of the roller mounting shaft 61 are respectively mounted on the upper plate 62 of the roller support and the lower plate 63 of the roller support.

Preferably, the upper part of the gear bracket 3 extends upwards with gear bracket clamping teeth 301, and the lower part of the roller bracket 6 extends downwards with a roller bracket clamping tooth 601 and a roller bracket positioning cylinder 602. The gear bracket clamping teeth 301 are connected to the The roller bracket clamping teeth 601 mesh with each other, and the inner side wall of the gear bracket clamping tooth 301 abuts against the outer side wall of the roller bracket positioning cylinder 602.

Preferably, an internal partition 22 is provided between the gear support 3 and the roller support 6, a partition middle through hole 221 is provided in the middle of the internal partition 22, and the gear support clamping teeth 301 and the roller support are clamped. The teeth 601 pass through the middle through hole 221 of the partition, and the outer walls of the gear bracket clamping teeth 301 and the roller bracket clamping teeth 601 abut against the inner wall of the partition middle through hole 221, and the intermediate partition 22 is in contact with the The ring gear 2 is an integrally formed part.

Preferably, the outer side wall of the ring gear 2 is provided with a ring gear fastening portion 201, and the side of the pump cover 5 is provided with a pump cover elastic buckle 501 used in conjunction with the ring gear fastening portion 201. The pump cover elastic buckle 501 is fastened on the ring gear fastening portion 201 and makes the pump cover 5 and the ring gear 1 fixedly connected to each other.

Preferably, the upper part of the ring gear 2 has a positioning concave ring 202, and the lower part of the pump cover 5 has a positioning convex rib 502 for use with the positioning concave ring 202. The positioning convex rib 502 is inserted into the positioning concave ring 202 and The pump cover 5 and the ring gear 1 are mutually positioned.

Preferably, a pump cover inner shaft 51 extends downward on the inner upper wall of the pump cover 5, the roller bracket 6 has a roller bracket central hole 66 in the middle, and the pump cover inner shaft 51 is inserted into the roller bracket central hole. In 66, the roller bracket 6 can rotate around the inner shaft 51 of the pump cover.

Preferably, the pump cover 5 is provided with two access slots 52, and the hose 7 extends from one of the access slots 52 into the pump cover 5 and extends along the inner wall of the pump cover 5 and further from the other. The access slot 52 extends to the outside of the pump cover 5; the motor 1 is fixedly connected to the motor bracket 11 by a first connecting screw 111, and the sensor bracket 8 and the gear ring 2 are fixed to the motor bracket 11 by a second screw 112 connect.

When the utility model is specifically implemented, after the motor 1 starts to work, the drive motor 1 drives the gear bracket 3 to rotate through the planetary gear set, and the gear bracket 3 drives the roller bracket 6 to rotate. The roller bracket 6 is in the process of rotating. The roller 60 squeezes the hose 7 peristally, and the liquid is sucked in from one end of the hose 7 and flowed out from the other end to realize the pumping function.

During the operation of the peristaltic pump, the roller bracket 6 rotates to drive the magnet 9 to rotate together. The pump cover 1 is equipped with a Hall sensor 8. When the roller bracket 6 drives the magnet 9 to rotate, the Hall sensor 8 receives the magnetic field changes to obtain the pump head Rotating speed. The Hall sensor 8 feeds back the received rotational speed signal to PCBA, and PCBA can further control the rotational speed of the motor 1 to achieve the purpose of precise flow control. It has the advantages of high flow control accuracy and low implementation cost.

The above is a detailed description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art can make various equivalents without departing from the spirit of the utility model. Variations or replacements, these equivalent variations or replacements are all included in the scope defined by the claims of this application.

Claims

A peristaltic pump based on Hall sensor to control flow, which is characterized in that it comprises a motor (1) and a motor bracket (11) fixed to each other. The upper part of the motor bracket (11) is provided with a ring gear (2), and the tooth The ring (2) has internal teeth (21), a radially rotatable gear bracket (3) is arranged inside the gear ring (2), and a driven gear is arranged between the gear bracket (3) and the motor bracket (11) (42), the motor (1) is a dual output shaft motor, the first output shaft of the motor (1) passes through the motor bracket (11) and extends into the ring gear (2), the motor (1) first The part of the output shaft extending into the ring gear (2) is fixedly provided with a driving gear (41), the driving gear (41) and the driven gear (42) mesh with each other, and the driven gear (42) and The internal teeth (21) of the ring gear (2) mesh with each other, and the upper part of the ring gear (2) is provided with a pump cover (5) with an internal cavity, and the internal cavity of the pump cover (5) is arranged There is a roller support (6), the bottom of the roller support (6) is connected with the gear support (3), a number of rollers (60) are provided on the roller support (6), and the inner edge of the pump cover (5) A hose (7) extends along its inner wall, and the outlet end and inlet end of the hose (7) extend from the side of the pump cover (5) to the outside of the pump cover (5), and the outer wall of the roller (60) abuts Press to the side wall of the hose (7) and force the hose (7) to elastically deform, the pump cover (5) is fixedly provided with a Hall sensor (8), and the roller bracket (6) is provided with a matching point The magnet (9) used in the Hall sensor (8) is described.
A peristaltic pump based on Hall sensor flow control according to claim 1, characterized in that: the pump cover (5) extends upwards with a sensor mounting bracket (53), and the Hall sensor (8) is detachable Ground mounted on the sensor mounting bracket (53), the sensor mounting bracket (53) has a sensor elastic buckle (54) at the mouth, and a through groove (55) is provided between the sensor mounting bracket (53) and the inside of the pump cover (5). ), there are four magnets (9) installed on the roller bracket (6), the four magnets (9) are arranged alternately with N/S poles, and the roller bracket (6) is provided with a magnet (9) Magnet mounting slot (67).
A peristaltic pump based on Hall sensor flow control according to claim 1, characterized in that: the driven gear (42) has three, and the driving gear (41) and the three driven gears (42) Together to form a planetary gear set;

The gear bracket (3) extends downwardly with a driven gear mounting shaft (31), and the driven gear (42) is arranged on the driven gear mounting shaft (31);

The roller bracket (6) is provided with a roller mounting shaft (61), the roller (60) is mounted on the roller mounting shaft (61), the roller (60) has four, and the roller mounting shaft (61) There are four.
The peristaltic pump based on Hall sensor control flow according to claim 3, characterized in that: the roller bracket (6) includes a bracket upper plate (62), a roller bracket lower plate (63) and connected to the roller bracket The roller support intermediate connecting shaft (64) and the roller support intermediate connecting plate (65) between the upper plate (62) and the lower plate (63) of the roller support, the two ends of the roller mounting shaft (61) are respectively mounted on the On the upper plate (62) of the roller support and the lower plate (63) of the roller support.
The peristaltic pump based on Hall sensor control flow according to claim 1, characterized in that: the upper part of the gear bracket (3) is extended with gear bracket teeth (301), and the lower part of the roller bracket (6) Extending downwards are the roller bracket locking teeth (601) and the roller bracket positioning cylinder (602), the gear bracket locking teeth (301) and the roller bracket locking teeth (601) mesh with each other, and the gear bracket locking teeth ( 301) The inner side wall abuts against the outer side wall of the roller bracket positioning cylinder (602).
The peristaltic pump based on Hall sensor control flow according to claim 5, characterized in that: an internal partition (22) is provided between the gear bracket (3) and the roller bracket (6), and the internal The partition plate (22) is provided with a partition middle through hole (221) in the middle position, and the gear bracket clamping teeth (301) and the roller bracket clamping teeth (601) pass through the partition middle through hole (221) In addition, the outer walls of the gear bracket clamping teeth (301) and the roller bracket clamping teeth (601) abut against the inner wall of the intermediate through hole (221) of the partition, the intermediate partition (22) and the ring gear (2) are One-piece molding.
The peristaltic pump based on Hall sensor flow control according to claim 1, characterized in that: the outer side wall of the ring gear (2) is provided with a ring gear fastening part (201), and the pump cover ( 5) A pump cover elastic buckle (501) used in conjunction with the ring gear fastening portion (201) is provided on the side, and the pump cover elastic buckle (501) is fastened on the ring gear fastening portion (201). ) And make the pump cover (5) and the gear ring (1) fixedly connected to each other.
A peristaltic pump based on Hall sensor flow control according to claim 1, characterized in that: the upper part of the ring gear (2) has a positioning concave ring (202), and the lower part of the pump cover (5) has a matching point. The positioning convex edge (502) used for the positioning concave ring (202) is inserted into the positioning concave ring (202) to enable the pump cover (5) and the gear ring (1) to be mutually positioned.
A peristaltic pump based on Hall sensor flow control according to claim 1, characterized in that: the inner upper wall of the pump cover (5) extends downwardly with an inner shaft (51) of the pump cover, and the roller bracket ( 6) The middle position has a roller bracket center hole (66), the pump cover inner shaft (51) is inserted into the roller bracket center hole (66), and the roller bracket (6) can wrap around the pump cover inner shaft (51) Rotate.
A peristaltic pump based on Hall sensor flow control according to any one of claims 1-9, characterized in that: the pump cover (5) is provided with two inlet and outlet slots (52), and the soft The pipe (7) extends from one of the access slots (52) into the pump cover (5) and extends along the inner wall of the pump cover (5) and further extends from the other access slot (52) to the pump cover (5) External; the motor (1) is fixedly connected to the motor bracket (11) by a first connecting screw (111), the sensor bracket (8) and the gear ring (2) are connected to the motor by a second screw (112) The bracket (11) is fixedly connected.