CN111852831A - a peristaltic pump - Google Patents

Abstract

The invention relates to a peristaltic pump which comprises a shell, an end cover, a rotating frame and at least two groups of roller groups, wherein each roller group comprises at least two rollers, a plane perpendicular to the rotation axis of the rollers is a first projection plane, an arc line connecting the center of a circle of each roller projection of each roller group is a first arc, and the rollers of each roller group are uniformly arranged on the first arc; the peristaltic pump still includes input tube, output tube and many conveyer pipes, and the conveyer pipe is located the casing and the quantity is no less than two, and the conveyer pipe is evenly arranged along the axis of revolution of gyro wheel, and the quantity of conveyer pipe corresponds to the quantity of the gyro wheel of each roller train. The rollers of each roller group are uniformly arranged in the first circular arc, so that the rollers of each roller group are staggered, the flow of fluid is ensured to be stable through the superposition of pulse flows of different soft conveying pipes under the condition that the pulse flows occur in a single conveying pipe, and the working stability of the peristaltic pump is ensured.

Description

a peristaltic pump

technical field

The invention belongs to the technical field of peristaltic pumps, in particular to a peristaltic pump.

Background technique

At present, the peristaltic pump utilizes a flexible hose, and the rotation of the rotating member drives the roller to rotate outside the tube to successively apply a plurality of traveling pressures, so as to form a closed section that travels forward and convey it into the hose of fluid. During the pumping process, the fluid will not contact any parts or other objects of the pump body other than the pipeline, which has obvious isolation and safety.

The existing peristaltic pump can produce the pulse flow of fluid in the pumping process, which affects the working stability of the peristaltic pump. A known solution is to increase the number of rollers along the rotation direction of the rotating part in the pump, such as: along the rotation of the rotating part The number of directional wheels has been increased from 4 to 16. However, this solution leads to an increase in the number of times the hose is squeezed and rubbed at the same position in one rotation cycle, thereby reducing the service life of the hose.

At the same time, another known solution is to connect a plurality of motors in parallel with the outer casing of the peristaltic pump, and the rotation angles of the rotating shafts of different motors are different to suppress the pulse flow. The volume is large and inconvenient to use.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a peristaltic pump that can ensure working stability and reduce costs.

In order to achieve the above-mentioned main purpose, the peristaltic pump provided by the present invention includes a casing and an end cover, the end cover is detachably assembled on the casing, and the peristaltic pump also includes a turret and at least two sets of rollers, each of which includes at least two a roller, the roller group is assembled on the turret; the plane perpendicular to the rotation axis of the roller is the first projection plane, the projection direction parallel to the rotation axis of the roller is the first projection direction, and each roller of each roller group is along the first projection surface. The projection direction of the roller on the first projection surface is a circle, and the arc connecting the center of the projection of each roller of each roller group on the first projection surface is the first arc, and the first arc and the turret are coaxial Arrangement, the rollers of each roller group are evenly arranged on the first arc; the peristaltic pump also includes an input pipe, an output pipe and a plurality of conveying pipes. If there are less than two, the conveying pipes are evenly arranged along the rotation axis of the rollers. One end of each conveying pipe is connected with an input pipe and the other end is connected with an output pipe. The number of conveying pipes corresponds to the number of rollers in each roller group.

It can be seen from the above scheme that the rollers of each roller group are evenly arranged on the first arc, so that the rollers of each roller group are staggered from each other, and each roller squeezes a conveying pipe respectively, and the number of conveying pipes of the peristaltic pump is the same as that of each roller. The number of rollers in the group is arranged correspondingly, and in the case of pulse flow in a single conveying pipe, the pulse flow of different flexible conveying pipes is superimposed to ensure the smooth flow of the fluid and the working stability of the peristaltic pump.

Preferably, the number of roller groups is four, each roller group has four rollers, and the turret is a cylinder.

Further, the outer wall of the turret is provided with a positioning device, and each roller is assembled to the positioning device.

Further, the positioning device includes a first positioning plate, a second positioning plate, a third positioning plate, a fourth positioning plate and a fifth positioning plate, a first positioning plate, a second positioning plate, a third positioning plate, and a fourth positioning plate. and the fifth positioning plate are arranged in sequence along the rotation axis of the turret.

Further, the first positioning plate and the fifth positioning plate are respectively arranged with one positioning opening, and the second positioning plate, the third positioning plate and the fourth positioning plate are respectively arranged with two positioning openings.

Further, a partition plate and a transmission column are arranged in the revolving frame. The transmission column extends from one side of the partition plate to the outside of the revolving frame along the rotation axis of the revolving frame. The outer wall of the transmission column is provided with a reinforcing plate, and the reinforcing plate is connected to the inner wall of the revolving frame. with transmission column.

Further, the shell includes a first shell and a second shell that are detachably and fixedly connected to each other, the first shell includes an end plate, an assembly column, an arc plate and a first connection portion, and the assembly column is from the inner side of the end plate. It extends to the inside of the first shell, the end plate is located at one end of the arc plate, and the first connecting part is arranged on both sides of the arc plate; the second shell includes a circular arc part and a second connecting part, and both sides of the arc part are arranged There is a second connecting portion, and the circular arc portion is concave from the end face of the second connecting portion to the inner side of the second housing.

Further, the assembly column is a cylinder, and the assembly column, the arc plate and the arc portion are arranged coaxially; the peristaltic pump further includes a motor, the motor is inserted into the assembly column, and the transmission shaft of the motor abuts the transmission column.

Further, the roller includes a wheel portion and a shaft portion, the shaft portion is detachably and fixedly connected to the wheel portion, and the shaft portion is rotatably assembled to the turret.

Further, the roller includes a wheel portion and a shaft portion, the shaft portion is integrally formed and fixedly connected to the wheel portion, and the shaft portion is rotatably assembled to the turret.

Description of drawings

The present invention will be further described with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. For those skilled in the art, without creative work, other attachments can also be obtained according to the following drawings. picture.

FIG. 1 is an exploded view of the structure of an embodiment of a peristaltic pump according to the present invention.

FIG. 2 is a structural diagram of a turret of an embodiment of a peristaltic pump according to the present invention.

FIG. 3 is a structural diagram of a first housing of an embodiment of a peristaltic pump according to the present invention.

4 is a partial structural diagram of an embodiment of a peristaltic pump according to the present invention

Detailed ways

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 accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

1 to 3 , the peristaltic pump 100 provided in this embodiment includes a casing and an end cover 1, and the end cover 1 is detachably screwed to the casing. The peristaltic pump 100 further includes a turret 2 and at least two sets of rollers. Each roller set includes at least two rollers 3 , and the roller sets are assembled on the turret 2 . In this embodiment, the turret 2 is an integral molded part. The number of roller groups is four, each roller group has four rollers 3, and the turret 2 is a cylinder.

The plane perpendicular to the rotation axis of the roller 3 is the first projection surface, the projection direction parallel to the rotation axis of the roller 3 is the first projection direction, and each roller 3 of each roller group is located on the first projection surface along the first projection direction. The projection of the roller 3 is a circle, and the arc connecting the center of the projection of each roller 3 of each roller group on the first projection surface is the first arc, and the first arc and the turret 2 are arranged coaxially. The rollers 3 of the roller group are evenly arranged on the first arc.

Referring to FIG. 1 and FIG. 2 , the outer wall of the turret 2 is provided with a positioning device, and each roller 3 is assembled to the positioning device. The positioning device includes a first positioning plate 5 , a second positioning plate 6 , a third positioning plate 7 , a fourth positioning plate 8 and a fifth positioning plate 9 , a first positioning plate 5 , a second positioning plate 6 and a third positioning plate 7 , the fourth positioning plate 8 and the fifth positioning plate 9 are arranged in sequence along the rotation axis of the turret 2, and each roller group is correspondingly arranged with a first positioning plate 5, a second positioning plate 6, a third positioning plate 7, a The fourth positioning plate 8 and a fifth positioning plate 9 are provided. The first positioning plate 5 and the fifth positioning plate 9 are respectively provided with one positioning port 10, the second positioning plate 6, the third positioning plate 7 and the fourth positioning plate 8 are respectively provided with two positioning ports 10, each positioning port 10 Each of the fourth positioning plates 8 is connected with one of the fourth positioning plates 8 adjacent to each other along the circumferential direction of the turret 2 .

The turret 2 is provided with a partition 11 and a transmission column 12. The transmission column 12 is a hollow cylinder. The transmission column 12 extends from one side of the partition 11 to the outside of the turret 2 along the rotation axis of the turret 2. The outer wall is provided with a reinforcing plate 13, the reinforcing plate 13 connects the inner wall of the turret 2 and the transmission column 12, and a plurality of reinforcing plates 13 are evenly arranged along the circumferential direction of the turret.

1 and 3 , the housing includes a first housing 15 and a second housing 16 that are detachably and fixedly connected to each other, the first housing 15 and the second housing 16 are both integrally formed parts, and the end cover 1 screw Connected to the first shell 15, the first shell 15 is screwed to the second shell 16, the first shell 15 includes an end plate 17, an assembly column 18, an arc plate 19 and a first connecting part 20, and the assembly column 18 is The cylindrical body, the assembly column 18, the arc plate 19 and the arc part are arranged coaxially, the assembly column 18 extends from the inner side of the end plate 17 to the inside of the first shell 15, the end plate 17 is located at one end of the arc plate 19, the arc Both sides of the plate 19 are arranged with first connecting portions 20 . The number of the first connecting parts 20 is two, and the two first connecting parts 20 are arranged opposite to each other along the radial direction of the arc plate 19 .

The second housing 16 includes a circular arc portion 21 and a second connecting portion 22 . The second connecting portions 22 are arranged on both sides of the circular arc portion 21 , and the circular arc portion 21 is concave from the end surface of the second connecting portion 22 to the second shell. inside of body 16 .

The number of the second connecting portions 22 is two, and the two second connecting portions are arranged opposite to each other in the radial direction of the circular arc portion. Each of the first connecting portions is provided with a plurality of hollow connecting posts, and the screws pass through the second connecting portion and penetrate the connecting posts to detachably connect the first casing 15 and the second casing 16 .

The peristaltic pump 100 further includes a motor 26, the motor 26 is inserted into the assembly column 18, the transmission shaft of the motor 26 abuts the transmission column 12, and the screw passes through the plate of the assembly column 18 and penetrates the motor 26 to connect the motor 26 with the first housing 15 are detachably and fixedly connected to each other.

Preferably, the roller 3 includes a wheel portion and a shaft portion, the shaft portion is detachably and fixedly connected to the wheel portion, the shaft portion passes through the wheel portion, the roller 3 is a separate part, and the shaft portion is rotatably assembled to the turret 2; or, The roller 3 includes a wheel portion and a shaft portion, the shaft portion is integrally formed and fixedly connected to the wheel portion, the roller 3 is an integrally formed part, and the shaft portion is rotatably assembled to the turret 2 .

The peristaltic pump 100 also includes an input pipe 23, an output pipe 24 and a plurality of delivery pipes 25. The input pipe 23 and the output pipe 24 respectively pass through the casing. The delivery pipes 25 are located in the casing and the number is not less than two. The rotation axes of the rollers are evenly arranged. One end of each conveying pipe 25 is connected with an input pipe 23 and the other end is connected with an output pipe 24. The number of conveying pipes 25 corresponds to the number of rollers 3 in each roller set. In this embodiment, the number of conveying pipes 25 is four, and both the input pipe 23 and the output pipe 24 are T-shaped pipes.

Referring to FIGS. 1 to 4 , the drive shaft of the motor drives the turret 2 to rotate through the drive column 12 , and the roller 3 squeezes the conveying pipe to convey the fluid. In each roller set and on the first arc, the arc connecting the center of the projection of one roller 3 and the other roller 3 along the circumferential direction of the turret 2 closest to the first projection plane The angle A is 22.5°, therefore, the rollers of each roller group are evenly arranged on the first arc, so that the rollers of each roller group are staggered from each other, and each roller squeezes a conveying pipe 25, the conveying pipe of the peristaltic pump 100 The number of 25 is arranged corresponding to the number of rollers of each roller group, and then in the case of pulse flow in a single conveying pipe 25, the pulse flow of different conveying pipes 25 is superimposed to ensure that the flow of the fluid in the output pipe is stable, ensuring that the peristaltic pump 100 Moreover, the peristaltic pump 100 does not need to connect multiple motors in parallel, which reduces the production cost and simplifies the structure of the peristaltic pump 100.

Finally, it should be emphasized that the present invention is not limited to the above-mentioned embodiments, and the above-mentioned descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification made within the spirit and principle of the present invention , equivalent replacements, improvements, etc., should all be included within the protection scope of the present invention.

Claims (10)

1. A peristaltic pump comprising a housing and an end cap removably fitted to the housing, characterized in that:

the peristaltic pump also comprises a rotating frame and at least two groups of roller groups, each group of roller comprises at least two rollers, and the roller groups are assembled on the rotating frame;

the plane perpendicular to the rotation axis of the roller is a first projection plane, the projection direction parallel to the rotation axis of the roller is a first projection direction, the roller projection of each roller group on the first projection plane along the first projection direction is circular, the arc connecting the center of circle of each roller projection of each roller group on the first projection plane is a first arc, the first arc and the rotating frame are coaxially arranged, and the rollers of each roller group are uniformly arranged on the first arc;

the peristaltic pump further comprises an input pipe, an output pipe and conveying pipes, wherein the input pipe and the output pipe penetrate through the shell respectively, the conveying pipes are located in the shell, the number of the conveying pipes is not less than two, the conveying pipes are arranged uniformly along the rotary axis of the rollers, one end of each conveying pipe is connected with the input pipe, the other end of each conveying pipe is connected with the output pipe, and the number of the conveying pipes corresponds to each roller group.

2. A peristaltic pump as claimed in claim 1, wherein:

the quantity of the roller groups is four, the rollers of each roller group are four, and the rotating frame is a cylinder.

3. A peristaltic pump as claimed in claim 2, wherein:

the outer wall of the rotating frame is provided with a positioning device, and each roller is assembled on the positioning device.

4. A peristaltic pump as claimed in claim 3, wherein:

the positioning device comprises a first positioning plate, a second positioning plate, a third positioning plate, a fourth positioning plate and a fifth positioning plate, wherein the first positioning plate, the second positioning plate, the third positioning plate, the fourth positioning plate and the fifth positioning plate are sequentially arranged along the rotary axis of the rotary frame.

5. A peristaltic pump as claimed in claim 4, wherein:

one positioning opening is respectively arranged on the first positioning plate and the fifth positioning plate, and two positioning openings are respectively arranged on the second positioning plate, the third positioning plate and the fourth positioning plate.

6. A peristaltic pump as claimed in claim 5, wherein:

the rotary frame is characterized in that a partition plate and a transmission column are arranged in the rotary frame, the transmission column extends from one side of the partition plate to the outer side of the rotary frame along the rotary axis of the rotary frame, a reinforcing plate is arranged on the outer wall of the transmission column, and the reinforcing plate is connected with the inner wall of the rotary frame and the transmission column.

7. A peristaltic pump as claimed in claim 6, wherein:

the shell comprises a first shell and a second shell which are fixedly connected with each other in a detachable mode, the first shell comprises an end plate, an assembling column, an arc plate and a first connecting portion, the assembling column extends to the interior of the first shell from the inner side face of the end plate, the end plate is located at one end of the arc plate, and the first connecting portion is arranged on two sides of the arc plate;

the second casing includes circular arc portion and second connecting portion, the both sides of circular arc portion have been arranged the second connecting portion, the circular arc portion certainly the terminal surface indent of second connecting portion is to the inboard of second casing.

8. A peristaltic pump as claimed in claim 7, wherein:

the assembling column is a cylinder, and the assembling column, the arc plate and the arc part are coaxially arranged;

the peristaltic pump further comprises a motor, the motor is inserted into the assembling column, and a transmission shaft of the motor abuts against the transmission column.

9. A peristaltic pump as claimed in any one of claims 1 to 8, wherein:

the gyro wheel includes wheel portion and axial region, axial region detachably fixed connection in the wheel portion, the axial region rotatably assemble in the revolving rack.

10. A peristaltic pump as claimed in any one of claims 1 to 8, wherein:

the gyro wheel includes wheel portion and axial region, axial region integrated into one piece ground fixed connection in the wheel portion, the axial region rotatably assemble in the revolving rack.

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