CN114320854B - A throwable electromagnetic peristaltic pump - Google Patents

Abstract

The invention discloses a throwable electromagnetic peristaltic pump, belonging to the field of micropumps, comprising a drive motor, a multi-stage ring magnet and a pump body, a tray is installed between the drive motor and the multi-stage ring magnet, and the multi-stage ring magnet A cover plate and an elastic film are installed between the magnet and the pump body, the cover plate is located above the elastic film, a plurality of magnet holes are opened inside the cover plate, and cylindrical magnets are installed on the inside of the cover plate through the magnet holes , two conduits are installed inside the pump body, two bolts and nuts are installed at the bottom of the pump body, a D-shaped groove is opened in the center of the tray, and an end surface is arranged on the outside of the tray. The disposable electromagnetic peristaltic pump described in the present invention only needs to drive the motor to rotate to drive the whole device to operate, and the energy consumption is relatively low, which solves the problem that the traditional electromagnetic pump is limited by the frequency of the electromagnetic coil and the frequency is not high. Changing the rotation direction of the drive motor can complete the exchange of the pump inlet and outlet.

Description

A throwable electromagnetic peristaltic pump

technical field

The invention relates to the field of micropumps, in particular to a throwable electromagnetic peristaltic pump.

Background technique

Microfluidic systems have been proven to be capable of biological samples such as cell culture monitoring, cell lysis, protein/DNA separation, DNA/reagent mixing, and DNA amplification, while appropriate micropumps and microvalve devices are the control fluids in the system. important means of delivery;

Electrohydrodynamic and magnetohydrodynamic micropumps have been developed, while membrane-based reciprocating and non-periodic displacement micropumps have also been extensively explored. In these micropumps, the deflection of the membrane changes the volume of the chamber, which drives fluid flow. Through this peristaltic motion, peristaltic pumps can usually withstand high back pressure. Existing membrane actuation methods include piezoelectric materials, electrostatic, thermopneumatic, electromagnetic, and compressed air actuation. Among the many driving methods above, compared with other driving methods, electromagnetic driving has the advantages of low driving voltage, simple control, and low manufacturing cost;

However, the existing throwable electromagnetic peristaltic pumps have certain deficiencies in use and need to be improved. Most of the existing electromagnetic pumps are armature electromagnetic pumps, which use mechanical springs as the recovery mechanism. When the coil is excited, the spring is compressed and broken. When magnetic, it is reset by spring. The mechanical spring brings two main defects. First, with the increase of the number of uses, the mechanical spring will inevitably fail, and second, the energy consumption is large. When the coil is excited, the spring is compressed. In many occasions, the pump has a long service time and the disadvantage of energy consumption is more significant. Third, it is not easy to achieve high frequency, because the driving frequency of this electromagnetic pump depends on the on-off frequency of the electromagnetic coil. , and the self-inductance coefficient of the multi-turn coil is relatively large, and its frequency is therefore greatly limited.

Contents of the invention

The object of the present invention is to provide a throwable electromagnetic peristaltic pump, which can solve the existing problems.

The purpose of the present invention can be achieved through the following technical solutions:

A throwable electromagnetic peristaltic pump, including a drive motor, a multi-stage ring magnet and a pump body, a tray is installed between the drive motor and the multi-stage ring magnet, and a cover is installed between the multi-stage ring magnet and the pump body plate and an elastic film, the cover plate is located above the elastic film, a plurality of magnet holes are opened inside the cover plate, cylindrical magnets are installed on the inside of the cover plate through the magnet holes, and a cylinder magnet is installed inside the pump body. Two conduits, two bolts and nuts are installed on the bottom of the pump body.

As a further technical solution of the present invention, a D-shaped groove is opened at the center of the tray, and an end surface is provided at the outer side of the tray.

As a further technical solution of the present invention, the lower end of the tray is inserted into the middle hole of the multi-stage ring magnet and connected with it, and the upper part of the tray is connected with the driving motor through a D-shaped groove.

As a further technical solution of the present invention, the inside of the pump body is provided with a through hole A, and the inside of the pump body is provided with a plurality of cylindrical cavities and annular grooves on the outside of the through hole A, and the inside of the cover plate is provided with a through hole B. The bolts and nuts are connected to the cover plate and the elastic film through the through hole A and the through hole B. The pump body is connected to the elastic film and the cover plate through the bolts and nuts. The elastic film is located in the middle of the pump body and the cover plate.

As a further technical solution of the present invention, the plurality of cylindrical cavities are arranged in a circle, the annular groove is connected through the cylindrical cavity, and the conduit is the same as the annular groove.

As a further technical solution of the present invention, the conduit includes an inlet pipe and an outlet pipe, both of which are installed in the pump body, and the inlet pipe is located on one side of the outlet pipe.

As a further technical solution of the present invention, the cylindrical magnet passes through the magnet hole, and the bottom of the cylindrical magnet is fixedly connected with the upper end of the elastic film.

As a further technical solution of the present invention, the cylindrical magnet includes magnet A, magnet B, magnet C, magnet D, magnet E and magnet F, magnet A, magnet B, magnet C, magnet D, magnet E and magnet F respectively Installed in a plurality of magnet holes arranged in a circular shape.

Beneficial effects of the present invention:

By setting the drive motor, multi-stage ring magnet, pump body, cylindrical magnet, cover plate, elastic film and conduit, a throwable pump body with cylindrical magnet, a multi-stage ring magnet and a drive motor, cylindrical magnet Installed in the elastic film of the inner cavity of the pump, when the drive motor drives the multi-stage ring magnet to rotate and close to the pump body, the cylindrical magnet will move up and down due to the magnetic force, which will drive the elastic film to vibrate and cause the volume of the cavity to change, thus realizing The suction and pumping of the fluid, the pump body and the driving part are separated, so the volume of the pump body itself can be small and not limited by the driving part. At the same time, because the pump body is separated from the driving part, it is used in some occasions where the fluid will pollute In this way, the pump body can be thrown away and the drive part can be recovered, and the present invention only needs to drive the motor to rotate to drive the whole device to run, and the energy consumption is relatively low. In addition, the working frequency of the pump depends on how much the drive motor drives. The rotation frequency of the first-stage ring magnet solves the problem that the traditional electromagnetic pump is limited by the frequency of the electromagnetic coil and the frequency is not high. Finally, because the invention is a completely symmetrical structure, any one of the two pipelines of the pump body can be connected with the incoming flow. The remaining one is connected with the outlet pipe, that is, the electromagnetic pump is bidirectional, changing the rotation direction of the driving motor can complete the exchange of the pump inlet and outlet.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the overall structure of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 2 is a split view of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 3 is three kinds of magnetic pole structure diagrams of the multistage ring magnet of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 4 is a structural diagram of a pump body of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 5 is the dissection diagram of the pump body of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 6 is a structural diagram of a tray of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 7 is an exploded view of a tray of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 8 is a structural diagram of a cover plate of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 9 is a fluid suction process diagram of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 10 is a fluid pumping process diagram of a throwable electromagnetic peristaltic pump of the present invention;

Fig. 11 is a working flowchart of a cylindrical magnet of a throwable electromagnetic peristaltic pump according to the present invention.

In the figure: 1. Drive motor; 2. Multi-stage ring magnet; 3. Pump body; 4. Tray; 5. Cylindrical magnet; 6. Cover plate; 7. Elastic film; 8. Conduit; 9. Bolt and nut; Inlet pipe; 82, outflow pipe; 31, annular groove; 32, cylindrical cavity; 33, through hole A; 41, D-shaped groove; 42, end face; 61, magnet hole; 62, through hole B; 51, magnet A; 52, magnet B; 53, magnet C; 54, magnet D; 55, magnet E; 56, magnet F.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Figure 1-11, a throwable electromagnetic peristaltic pump includes a drive motor 1, a multi-stage ring magnet 2 and a pump body 3, and a tray 4 is installed between the drive motor 1 and the multi-stage ring magnet 2, and the multi-stage A cover plate 6 and an elastic film 7 are installed between the ring magnet 2 and the pump body 3. The cover plate 6 is located above the elastic film 7. A plurality of magnet holes 61 are provided inside the cover plate 6, and the inside of the cover plate 6 passes through the magnet holes. 61 is equipped with a cylindrical magnet 5, two conduits 8 are installed inside the pump body 3, and two bolts and nuts 9 are installed at the bottom of the pump body 3.

A D-shaped groove 41 is opened at the center of the tray 4 , and an end surface 42 is provided at the outer side of the tray 4 .

The lower end of the tray 4 is inserted into the middle hole of the multistage ring magnet 2 to be connected with it, and the top of the tray 4 is connected to the drive motor 1 through a D-shaped groove 41, so that the multistage ring magnet 2 can rotate with the drive motor 1.

The inside of the pump body 3 is provided with a through hole A33, the inside of the pump body 3 is located on the outside of the through hole A33, and a plurality of cylindrical cavities 32 and annular grooves 31 are opened, and the inside of the cover plate 6 is provided with a through hole B62, through which the bolts and nuts 9 pass. The through hole A33 and the through hole B62 are connected with the cover plate 6 and the elastic membrane 7, and the pump body 3 is connected with the elastic membrane 7 and the cover plate 6 through bolts and nuts 9, and the elastic membrane 7 is located in the middle of the pump body 3 and the cover plate 6.

A plurality of cylindrical chambers 32 are arranged in a circle, the annular groove 31 is connected through the cylindrical chamber 32, the conduit 8 is the same as the annular groove 31, the diameter of the cylindrical chamber 32 is larger than the diameter of the cylindrical magnet 5 plus twice the thickness of the elastic film 7, so the cylindrical magnet 5 It can be pressed into the cylindrical cavity 32 together with the elastic film 7 under the action of magnetic force.

The conduit 8 includes an inlet pipe 81 and an outlet pipe 82, the inlet pipe 81 and the outlet pipe 82 are installed in the pump body 3, the inlet pipe 81 is located on one side of the outlet pipe 82, the inlet pipe 81 and the outlet pipe The two flow pipes 82 are arranged at one end of the pump body 3 and can be converted to each other according to the actual fluid flow direction.

The cylindrical magnet 5 passes through the magnet hole 61, and the bottom of the cylindrical magnet 5 is fixedly connected with the upper end of the elastic film 7.

Cylindrical magnet 5 comprises magnet A51, magnet B52, magnet C53, magnet D54, magnet E55 and magnet F56, and magnet A51, magnet B52, magnet C53, magnet D54, magnet E55 and magnet F56 are respectively installed in a plurality of magnet holes 61, A plurality of magnet holes 61 are arranged in a circle, and the number of cylindrical magnets 5 is equal to the number of pole pairs of the multistage ring magnet 2 multiplied by two.

In this throwable electromagnetic peristaltic pump, when in use, all the cylindrical magnets 5 are arranged with the N level on the top and the S level on the bottom. From the top view, the magnets are numbered counterclockwise from the inlet pipe 81 to magnet A51-magnet F56. When the pump When in the non-working state and not subjected to the magnetic force, all the cylindrical magnets 5 only droop under the action of gravity, and the pump is not turned on. When subjected to the repulsive force of the multi-stage ring magnet 2, the magnet A51, the magnet C53, and the magnet E55 first carry the elastic film 7 is pressed down, the volume of the cavity decreases, and as the drive motor 1 drives the multi-stage ring magnet 2 to rotate, magnet A51, magnet C53, and magnet E55 are sucked up by the suction force, and the volume of the cavity increases, forming a negative pressure, making The fluid is sucked in, and then with the rotation of the multi-stage magnets, the magnet A51, the magnet C53, and the magnet E55 are pushed down by the repulsive force, and the magnet B52, the magnet D54, and the magnet F56 are sucked up by the suction force, so that the magnet A51, the magnet C53 The fluid in the cavity corresponding to the magnet E55 can enter the cavity corresponding to the magnet B52, the magnet D54, and the magnet F56 to complete the pumping process.

Figure 11 shows a working process completed by the electromagnetic peristaltic pump, Figure 8 shows the process of pumping fluid into the cylindrical cavity 32 corresponding to magnet A51, and the process of pumping fluid from the cylindrical cavity 32 corresponding to magnet A51 to the cavity corresponding to magnet B52 , the rest of the process can be obtained in the same way, the fluid will move from the inlet pipe 81 to the outlet pipe 82 like a "peristalsis". When changing the position of the inlet pipe 81 and the outlet pipe 82, the working principle of the peristaltic pump is the same as the above The same, except that the flow direction is from the inlet pipe 81 to the corresponding cylindrical chamber 32 of the magnet F56, and then passes through the remaining chambers in turn, passes through the cylindrical chamber 32 corresponding to the magnet A51, and then flows out from the outlet pipe 82.

A throwable pump body 3 with a cylindrical magnet 5, a multi-stage The ring magnet 2 and a driving motor 1, the cylindrical magnet 5 is installed in the elastic film 7 of the inner cavity of the pump body 3, when the driving motor 1 drives the multi-stage ring magnet 2 to rotate and approaches the pump body 3, the cylindrical magnet will be caused by the magnetic force 5 moves up and down, thereby driving the elastic film 7 to vibrate so that the volume of the cavity changes, so as to realize the suction and pumping of the fluid. The pump body 3 is separated from the driving part, so the volume of the pump body 3 itself can be very small without being affected by Due to the limitation of the driving part, at the same time, because the pump body 3 is separated from the drive, the pump body 3 can be thrown away and the driving part can be recovered in the use occasions where some fluids will pollute, and the present invention only needs to drive the motor 1 to rotate when in use. It can drive the whole device to run, and the energy consumption is relatively low. In addition, the working frequency of the pump depends on the frequency at which the drive motor 1 drives the multi-stage ring magnet 2 to rotate, which solves the problem of the traditional electromagnetic pump being limited by the frequency of the electromagnetic coil and the frequency is not high. Problem, finally, because the present invention is a completely symmetrical structure, any one of the two pipelines of the pump body 3 can be connected with the inlet pipe 81, and the remaining one is connected with the outlet pipe 82, that is, the electromagnetic pump is bidirectional. Changing the rotation direction of the drive motor 1 can complete the exchange of the pump inlet and outlet.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art , without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but as long as it does not depart from the technical solution of the present invention, the technical content of the present invention In essence, any brief modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (1)

1. A disposable electromagnetic peristaltic pump is characterized in that: it comprises a drive motor (1), a multistage ring magnet (2) and a pump body (3), and the drive motor (1) and the multistage ring magnet (2 ), a tray (4) is installed between the multi-stage ring magnet (2) and the pump body (3) and a cover plate (6) and an elastic film (7) are installed, and the cover plate (6) is located on the elastic Above the film (7), the inside of the cover plate (6) is provided with a plurality of magnet holes (61), and the inside of the cover plate (6) is equipped with a cylindrical magnet (5) through the magnet holes (61). Two conduits (8) are installed inside the pump body (3), two bolts and nuts (9) are installed on the bottom of the pump body (3), and a D-shaped groove is provided at the center of the tray (4) (41), the outer side of the tray (4) is provided with an end face (42), the lower end of the tray (4) is inserted into the middle hole of the multi-stage ring magnet (2) and connected with it, and the top of the tray (4) passes through the D The groove (41) is connected with the drive motor (1), and the inside of the pump body (3) is provided with a through hole A (33), and the inside of the pump body (3) is located on the outside of the through hole A (33). A cylindrical cavity (32) and an annular groove (31), the inside of the cover plate (6) is provided with a through hole B (62), and the bolt and nut (9) pass through the through hole A (33) and the through hole B (62) ) is connected with the cover plate (6) and the elastic film (7), the pump body (3) is connected with the elastic film (7) and the cover plate (6) through bolts and nuts (9), and the elastic film (7) is located in the pump body ( 3) In the middle of the cover plate (6), the plurality of cylindrical cavities (32) are arranged in a circle, the annular groove (31) is connected through the cylindrical cavity (32), and the conduit (8) is the same as the annular groove (31) , the conduit (8) includes an inlet pipe (81) and an outlet pipe (82), the inlet pipe (81) and the outlet pipe (82) are installed in the pump body (3), the inlet The pipe (81) is positioned at one side of the outflow pipe (82), the cylindrical magnet (5) passes through the magnet hole (61), and the bottom of the cylindrical magnet (5) is fixedly connected with the upper end of the elastic film (7). Cylindrical magnet (5) comprises magnet A (51), magnet B (52), magnet C (53), magnet D (54), magnet E (55) and magnet F (56), magnet A (51), magnet B (52), magnet C (53), magnet D (54), magnet E (55) and magnet F (56) are respectively installed in a plurality of magnet holes (61), and a plurality of magnet holes (61) are circular arrangement.

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