Electromagnetic diaphragm pump

Abstract

The application discloses an electromagnetic diaphragm pump and belongs to the technical field of diaphragm pumps. The electromagnetic diaphragm pump comprises a main cavity, a diaphragm body, a pump-in pipeline, a first pump-out pipeline, a reaction cavity and a plurality of electromagnetic driving devices; the main cavity is divided into a plurality of sub-cavities, each of the sub-cavities is internally provided with a diaphragm valve, and the number of the sub-cavities is consistent with the number of the electromagnetic driving devices. The electromagnetic diaphragm pump is provided with a slow-flow curved surface platform, so that liquid can be fully dissolved and reacted after entering from a plurality of pump-in pipelines. In addition, the main cavity is integrally injection molded instead of being installed by parts, so that the electromagnetic field uniformity can be effectively prevented from being interfered by magnetic metal materials, the sealing performance is greatly improved, the size accuracy can be ensured, the injection molding process has the advantages of high molding efficiency and flexibility, and the like. The coil frame in the application has a light weight, cooperates with a tower-shaped limiting spring to make reciprocating motion, and replaces the reciprocating motion of the existing heavy permanent magnet, so that the power consumption can be effectively reduced, and the coil frame has the characteristics of excellent heat dissipation and light weight.

Description

Technical Field

[0001] This invention relates to electromagnetic diaphragm pumps and belongs to the field of diaphragm pump technology. Background Technology

[0002] Electromagnetic diaphragm pumps, also known as electromagnetic vibrating diaphragm pumps, are widely used in various fields: in the chemical industry, they are commonly used to transport corrosive media and flammable and explosive gases; in medical equipment, they are used to transport biological pharmaceuticals and medical fluids; in the environmental protection field, they are used for wastewater treatment and sludge transport. Furthermore, electromagnetic diaphragm pumps are widely used in laboratories, food processing, papermaking, and electronics manufacturing industries. Compared to traditional diaphragm pumps, electromagnetic diaphragm pumps have significant advantages. Traditional diaphragm pumps typically use pneumatic transmission or crank-connecting rod mechanisms, while electromagnetic diaphragm pumps are driven by electromagnetic force, eliminating the need for an external air source or complex mechanical transmissions, thus simplifying the system structure. Electromagnetic diaphragm pumps feature fast response, low noise, and no lubrication required, making them suitable for applications requiring precise flow control and regulation. Its structure includes a diaphragm made of rubber, an intake chamber, an exhaust chamber, and a compression chamber. A piston rod is installed in the compression chamber and connected to the diaphragm. An oscillator with a magnet is connected to both ends of the piston rod. The working principle is that the magnetic field oscillation does work to drive the diaphragm to reciprocate, changing the volume of the compression chamber and realizing the intake and exhaust of fluid.

[0003] Taking patent publication number CN113090511A as an example, in existing electromagnetic diaphragm pump technology, the electromagnetic drive component adopts a direct-acting electromagnetic system. A certain amount of enameled wire is wound around the iron core, and the conductor is connected to an adjustable drive power supply. The permanent magnet is made of N52 material, and the diaphragm is made of materials such as polytetrafluoroethylene. The central through-hole and the permanent magnet are fixed by screws. When the conductor is energized, the change in magnetic poles drives the permanent magnet to perform reciprocating motion, which in turn drives the diaphragm on the corrugated surface to move. The magnetic isolation property avoids direct mechanical contact and reduces mechanical wear. However, in actual use, it has been found that the movement of the heavy permanent magnet core causes more power loss, and the large gap required for the reciprocating motion of the iron core also causes mechanical vibration and noise under high-frequency conditions. Furthermore, without protection and limiting devices, this direct-acting electromagnetic structure is prone to safety issues such as collisions between the iron core and other components, leading to core damage or diaphragm damage and leakage. Summary of the Invention

[0004] The present invention addresses the technical problems mentioned in the background section by employing the following technical solution:

[0005] An electromagnetic diaphragm pump includes a main chamber, a diaphragm body, a pump inlet pipe, a first pump outlet pipe, a reaction chamber, and several electromagnetic drive devices.

[0006] The main chamber is divided into several sub-chambers, each of which is equipped with a membrane valve, and the number of sub-chambers is the same as the number of electromagnetic drive devices;

[0007] Each of the electromagnetic drive devices includes an internal magnetic conductor and an external magnetic conductor. A limiting spring is provided at the lower end of the internal magnetic conductor. A coil frame is installed in the gap between the internal magnetic conductor and the external magnetic conductor. A coil is installed on the coil frame. When the coil is energized and drives the coil frame to move upward in the magnetic field, the limiting spring acts as a buffer.

[0008] The bottom of the coil frame is connected to the diaphragm body, and the diaphragm body is positioned above the chamber.

[0009] Each of the sub-chambers is connected at one end to a pump inlet pipe and at the other end to a first pump outlet pipe.

[0010] The other ends of several first pump outlet pipes are connected to the reaction chamber. The interior of the reaction chamber is provided with a slow-flow curved platform. A stirring assembly is provided between the top of the slow-flow curved platform and the first pump outlet pipe located in the center of the main chamber for stirring and mixing the substances from each sub-chamber in the reaction chamber.

[0011] Preferably, a one-way valve is provided at the bottom of each of the sub-chambers and the pump inlet pipe. The membrane valve includes a pump inlet membrane valve and a pump outlet membrane valve. A pump inlet membrane valve is provided at the inlet of each of the sub-chambers and the pump inlet pipe, and a pump outlet membrane valve is provided between each of the sub-chambers and the first pump outlet pipe.

[0012] It should be noted that the purpose of setting up the check valve is to effectively balance the water pressure and prevent the pump inlet diaphragm valve from not closing. The bottom opening of the chamber and the bottom opening of the pump inlet pipe are on the same axis, and this axis is parallel to the radial straight inner wall of the chamber.

[0013] In addition, the inlet and outlet diaphragm valves are made of high-performance and corrosion-resistant rubber materials. The cross-sectional area of ​​the inlet pipe is 1 / 3 of the cross-sectional area of ​​the first outlet pipe. That is, for the same height inlet and outlet pipes, the liquid volume in the first outlet pipe is 2-3 times the liquid volume pumped into a single inlet pipe. The cross-sectional area inside the chamber is 2 times or more than the area of ​​the inlet or outlet diaphragm valve, and the height is less than 1 / 3 of the height of the entire main chamber. The inlet pipe is pumped out to the first outlet pipe through the narrow chamber. This process increases the water pressure, so that different liquids can fully mix and react under working conditions.

[0014] Preferably, the electromagnetic drive device further includes a cylindrical magnet and a ring magnet. The cylindrical magnet is nested and fixed on the ring magnet. The outer magnetic conductor wraps around the ring magnet and is installed in contact with the upper end of the cylindrical magnet, presenting the S pole. The top of the inner magnetic conductor is in contact with the lower end of the cylindrical magnet, presenting the N pole. The magnetic field B generated by the inner and outer magnetic conductors is directed outward. When current is passed through the coil in a counterclockwise direction, the magnetic force F on the coil is directed downward.

[0015] It should be noted that in this invention, the magnetic field needs to be concentrated in the narrow slit formed by the two pole pieces. For this device structure, an improved magnetic circuit structure and magnetic materials are used to replace and change the geometric structure of the coil, such as the width, spacing, and number of turns.

[0016] Both cylindrical and toroidal magnets use neodymium iron boron magnets, i.e., N52 material, which have high remanence flux density and coercivity. Both the outer and inner magnetic conductors are thin-walled iron materials. The magnetic circuit structure is a concentrated flux type. The cylindrical magnet is a cylinder with a diameter r and a height h. The magnetization direction is axial, with the upper end being the S pole and the lower end being the N pole. The toroidal and cylindrical magnets are bonded and nested together. The inner ring has a diameter r, the outer ring has a diameter 3r, and a height 2h. The magnetization direction is radial, with the inner ring being the N pole and the outer ring being the S pole. The thin sheet of the outer magnetic conductor wraps around the toroidal magnet. The magnetic wall of the inner magnetic conductor is connected to the N pole, and the magnetic wall of the outer magnetic conductor is connected to the S pole. The length of the thin-walled tube of the outer magnetic conductor is the sum of the height of the toroidal magnet and the length of the coil frame. The tube wall of the inner magnetic conductor expands outward from 2h by 1 / 3r width to engage the cylindrical magnet.

[0017] When r≥20mm, the outer thin-walled tube of the internal magnetic conductor also narrows inward by 1 / 3r width from 2h. A tower-shaped limiting spring is set at the lower end of the thin wall of the internal magnetic conductor, which plays the role of limiting and shock absorption for the coil, and can effectively avoid the safety hazards caused by collision.

[0018] The coil frame is an aluminum sleeve with slits in the tube wall. Symmetrical stiffening ribs are set at a certain distance at 1 / 2 of the sleeve to separate the two sets of coils. The coil material is copper-clad aluminum wire. A 30° inclined hollow support slope extends from one side of the sleeve and is fixedly connected to the circular buckle with an inwardly contracting structure. The circular buckle and the protrusion in the center of the diaphragm body are engaged and installed, forming the motion oscillation part in the electromagnetic drive device.

[0019] Based on COMSOL Multiphysics coupling simulation, the theoretical formula is as follows:

[0020]

[0021] Where: W - power consumption, Z - electromagnetic impedance, I - current through the coil, t n - The nth current cycle;

[0022] The power consumption value can be calculated using the above formula, and compared with the prior art, thus demonstrating the advantage of the electromagnetic drive device in this invention in terms of power consumption.

[0023] Preferably, the stirring assembly includes a through rod and rotating blades. The lower half of the reaction chamber is a conical cavity with a constricted opening facing downwards and connected to a second pump outlet pipe. The slow-flow curved platform is installed in the conical cavity, and the edge of the slow-flow curved platform is higher than the maximum diameter of the conical cavity. The axis of the slow-flow curved platform is on the same axis as the axis of the conical cavity. The slow-flow curved platform has a central concave shape and a convex structure around the perimeter. The central concave part of the slow-flow curved platform is fixedly installed to the lower end of the through rod, allowing liquid to flow from the central concave to the convex perimeter, and then flow into the lower half through the gap between the slow-flow curved platform and the reaction chamber until it flows out of the second pump outlet pipe. The rotating blades are movably disposed in the lower half of the through rod and are located between the upper end face of the reaction chamber and the slow-flow curved platform. The diameter of the rotating blades is smaller than the diameter of the circle enclosed by the highest point of the slow-flow curved platform. The tail end of the rotating blades is spirally distributed relative to the through rod.

[0024] It should be noted that the process of water flowing from the upper surface of the reaction chamber to the slow-flow curved platform increases the water pressure, thereby enabling different liquids to fully mix and react. The rotating blades of the reaction chamber also serve the same purpose. At the same time, in order to prevent the formation of precipitated flocculent impurities when different liquids are mixed and pumped out of the reaction chamber for reaction, the center of the slow-flow curved platform is set to be concave, so that the sediment can settle there.

[0025] Preferably, the main chamber is divided into three sub-chambers, and the pump inlet pipes connected to the three sub-chambers are distributed at 120° on the outer ring of the main chamber. The number of electromagnetic drive devices is also three.

[0026] Preferably, the main chamber is disc-shaped, and the first pumping pipe is located in the center of the main chamber. The main chamber is integrally injection molded, and each of the sub-chambers is provided with an inlet connected to the pumping pipe. The three sub-chambers share an outlet connected to the first pumping pipe. The cavity wall between each inlet and the sub-chamber is provided with a bevel. One end of each pumping membrane valve is adhered and fixed to the inner wall of the sub-chamber, so that the pumping membrane valve can open and close in one direction when water flows in. Each first pumping pipe is provided with a symmetrical support structure. The pumping membrane valves installed between each first pumping pipe and the sub-chamber are two symmetrical pieces. The ends of the pumping membrane valves are adhered and fixed to the support structure of the first pumping pipe. The support structure of the first pumping pipe has a unidirectional through hole in the center, and one end of the through bar is fixed in the hole.

[0027] It should be noted that the main chamber is made of plastic, and the outlet is opened from the center of the main chamber to one side. The diaphragm is installed on the opposite side of the main chamber, with an opening on one side.

[0028] Using integral injection molding instead of modular assembly of the main chamber greatly improves sealing and ensures dimensional accuracy. It also provides better high-precision assembly of other components. Injection molding also has advantages such as high molding efficiency and flexibility.

[0029] In addition, all other components except the drive unit are made of plastic injection molding, especially curved and spherical structures, such as leakage protection cavities and slow-flow curved platforms, which can effectively prevent magnetic metal materials from interfering with the uniformity of the electromagnetic field.

[0030] Preferably, each of the pumping pipes is equipped with a solenoid valve, the lower end of each pumping pipe is connected to the water inlet, each pumping pipe is provided with a partition that divides the pumping pipe into two, one side of the partition is provided with an opening and is engaged with the solenoid valve, the lower end of the pumping pipe is connected to the water inlet at the bottom center of the bottom of the inlet is provided with a through one-way valve inlet and is fixed to one end of the one-way valve, the other end of the one-way valve is connected to the one-way valve outlet at the bottom of the partition chamber.

[0031] Furthermore, the pump inlet pipe is equipped with a filter screen, which is located at the upper end of the solenoid valve. The filter screen is frustum-shaped and has openings in its thin wall. The check valve contains a valve core, and the inner wall of the transverse pipe of the check valve has a constriction. When the water flow pushes the valve core to move in the direction of the constriction in the transverse pipe, it engages and blocks the constriction. When the valve core moves away from the direction of the constriction in the transverse pipe, a spring inside the check valve prevents the valve core from flowing out of the check valve.

[0032] Preferably, the upper part of the main chamber is fixed with a cover plate to the diaphragm body, and a leak-proof gasket is provided at the gap between the cover plate and the diaphragm body. The upper part of the main chamber is also provided with a leakage protection chamber, which is connected to the main chamber through the diaphragm body.

[0033] Preferably, the top of the leakage protection cavity is provided with a coil frame mounting hole, and the side end of the leakage protection cavity is provided with a first fixing hole. The bottom of the coil frame is sleeved on the leakage protection cavity through the coil frame mounting hole, and the ring buckle at the lower end of the coil frame is fixedly connected to the diaphragm body. The first fixing hole is used to fix the leakage protection cavity on the cover plate.

[0034] Furthermore, the cover plate is provided with a number of second fixing holes and a number of diaphragm mounting holes, and several diaphragm mounting holes are arranged around a second fixing hole. The first fixing hole and the second fixing hole are installed by rivets. The cover plate is pressed against the upper outer surface of the main chamber. The diameter of the diaphragm mounting hole is smaller than the diameter of the diaphragm body. The diaphragm body is located between the cover plate and the upper end of the main chamber. The edge of the diaphragm body is pressed and installed.

[0035] Preferably, a cover is installed on the top of the main chamber, and the cover is used to cover the electromagnetic drive device and the leakage protection chamber.

[0036] Preferably, a power module is also installed at the top center of the main chamber. The plunger on the solenoid valve is electrically connected to the power module via a wire, and the power module is also electrically connected to the coil via a wire to supply power to the electromagnetic drive device.

[0037] The beneficial effects of the present invention are: the present invention sets up a slow-flow curved platform, which allows different liquids to fully mix and react after entering from multiple pump inlets, until they flow out from a single pump outlet.

[0038] In addition, using integral injection molding instead of the main body chamber with component assembly can effectively prevent magnetic metal materials from interfering with the electromagnetic field uniformity, greatly improve its sealing performance, and ensure dimensional accuracy. It also provides better high-precision assemblage for other components. Injection molding process also has the advantages of high molding efficiency and flexibility.

[0039] The coil frame in this invention is lightweight and reciprocates within the gap of the magnetic conductor in cooperation with the tower-shaped limiting spring, replacing the reciprocating motion of the existing heavy permanent magnet. This effectively reduces power consumption and features excellent heat dissipation and lightweight characteristics. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the present invention;

[0041] Figure 2 yes Figure 1 Sectional view along the middle AA direction;

[0042] Figure 3 This is a front cross-sectional view of the electromagnetic drive device in this invention, where B represents the direction of the magnetic field and F represents the direction of the magnetic force on the coil;

[0043] Figure 4 This is a top cross-sectional view of the main chamber in this invention;

[0044] Figure 5 This is a front cross-sectional view of the reaction chamber in this invention;

[0045] Figure 6 This is a cross-sectional view of the pump inlet pipe in this invention;

[0046] Figure 7 This is a schematic diagram of the leakage protection cavity in this invention;

[0047] Figure 8 This is a schematic diagram of the compressed and stretched states of the diaphragm in this invention, where the left diagram shows the compressed state and the right diagram shows the stretched state.

[0048] Figure 9 This is a schematic diagram of the cover plate in this invention;

[0049] Figure 10 This is a schematic diagram of the rotating blade in this invention;

[0050] Figure 11 This is a schematic diagram of the coil frame and the ring buckle in this invention;

[0051] Figure 12 This is a flowchart of the control system in this invention;

[0052] Figure 13 This is a current curve diagram comparing the voice coil electromagnetic type with the direct-acting electromagnetic type in this invention.

[0053] In the diagram: 1-Electromagnetic drive device; 101-Cylindrical magnet; 102-Ring magnet; 103-External magnetic conductor; 104-Internal magnetic conductor; 105-Limiting spring; 111-Coil frame; 112-Coil; 113-Ring buckle; 2-Leakage protection chamber; 201-Coil frame mounting hole; 202-First fixing hole; 3-Diaphragm body; 4-Main chamber; 401-Pump inlet membrane valve; 411-Pump outlet membrane valve; 421-Check valve inlet; 431-Check valve outlet 441-Inlet; 442-Secondary chamber; 443-First pump outlet pipe; 5-Rotating vane; 6-Slow-flow curved platform; 501-Through rod; 7-Reaction chamber; 8-Second pump outlet pipe; 9-Check valve; 901-Valve core; 10-Power module; 11-Pump inlet pipe; 1101-Filter screen; 1102-Solenoid valve; 1103-Plunger; 12-Shell cover; 13-Cover plate; 131-Second fixing hole; 132-Diaphragm mounting hole; 14-Leak-proof gasket. Detailed Implementation

[0054] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0055] like Figure 1-13 As shown, the electromagnetic diaphragm pump includes a main chamber 4, a diaphragm body 3, a pump inlet pipe 11, a first pump outlet pipe 443, a reaction chamber 7, and three electromagnetic drive devices 1.

[0056] The main chamber 4 is divided into three sub-chambers 442. Each sub-chamber 442 is equipped with a diaphragm valve. Each electromagnetic drive device 1 includes an internal magnetic conductor 104, an external magnetic conductor 103, and a limiting spring 105 at the lower end of the internal magnetic conductor 104. A coil frame 111 is installed in the gap between the internal magnetic conductor 104 and the external magnetic conductor 103. A coil 112 is installed on the coil frame 111. When the coil 112 is energized and drives the coil frame 111 to move upward in the magnetic field, the limiting spring 105 acts as a buffer.

[0057] The bottom of the coil frame 111 is connected to the diaphragm body 3, and the diaphragm body 3 is located above the chamber 442;

[0058] One end of each of the sub-chambers 442 is connected to the pump inlet pipe 11, and the other end is connected to the first pump outlet pipe 443;

[0059] The other ends of several first pump outlet pipes 443 are connected to the reaction chamber 7. The reaction chamber 7 is provided with a slow-flow curved platform 6. A stirring assembly is provided between the top of the slow-flow curved platform 6 and the first pump outlet pipe 443 located in the center of the main chamber 4, which is used to stir and mix the substances from each sub-chamber in the reaction chamber 7.

[0060] Each of the sub-chambers 442 and the bottom of the pump inlet pipe 11 is provided with a one-way valve 9. The membrane valve includes a pump inlet membrane valve 401 and a pump outlet membrane valve 411. A pump inlet membrane valve 401 is provided on the inlet 441 of each sub-chamber 442 and the pump inlet pipe 11. A pump outlet membrane valve 411 is provided between each sub-chamber 442 and the first pump outlet pipe 443. The pump inlet pipes 11 connected to the three sub-chambers 442 are distributed at 120° on the outer ring of the main chamber 4.

[0061] The inlet diaphragm valve 401 and the outlet diaphragm valve 411 are made of high-performance and corrosion-resistant rubber material. The cross-sectional area of ​​the inlet pipe 11 is 1 / 3 of the cross-sectional area of ​​the first outlet pipe 443. That is, for the same height inlet pipe 11 and the first outlet pipe 443, the liquid volume in the first outlet pipe 443 is 2-3 times the liquid volume pumped in by a single inlet pipe 11. The cross-sectional area inside the chamber 442 is more than 2 times the area of ​​the inlet diaphragm valve 401 or the outlet diaphragm valve 411, and the height is less than 1 / 3 of the height of the entire main chamber 4. The inlet pipe 11 is pumped out to the first outlet pipe 443 through the narrow chamber 442. This process can increase the water pressure, so that different liquids can fully mix and react under working conditions.

[0062] The electromagnetic drive device 1 also includes a cylindrical magnet 101 and a ring magnet 102. The cylindrical magnet 101 is nested and fixed on the ring magnet 102. The outer magnetic conductor 103 wraps around the ring magnet 102 and is installed in contact with the upper end of the cylindrical magnet 101, presenting the S pole. The top of the inner magnetic conductor 104 is in contact with the lower end of the cylindrical magnet 101, presenting the N pole. The magnetic field B generated by the inner magnetic conductor 104 and the outer magnetic conductor 103 is directed outward. When current is passed through the coil 112 in a counterclockwise direction, the magnetic force F on the coil 112 is directed downward.

[0063] In this invention, the magnetic field needs to be concentrated in the narrow slit formed by the two pole pieces. For this device structure, an improved magnetic circuit structure and magnetic materials are used to replace and change the geometric structure of the coil, such as the width, spacing, and number of turns.

[0064] Both the cylindrical magnet 101 and the ring magnet 102 use neodymium iron boron magnets with high remanence flux density and coercivity (it should be noted that their size can be flexibly modified as needed within a diameter range of 1-120 mm and a height range of 0.3-120 mm), i.e., N52 material. The outer magnetic conductor 103 and the inner magnetic conductor 104 are both thin-walled iron. The magnetic circuit structure is a concentrated flux type. The cylindrical magnet 101 is a cylinder with a diameter r and a height h, magnetized axially, with the upper end as the S pole and the lower end as the N pole. The ring magnet 102... The inner ring is attached to and nested with the cylindrical magnet 101. The inner ring diameter is r, the outer ring diameter is 3r, and the height is 2h. The magnetization direction is radial magnetization. The inner ring is the N pole and the outer ring is the S pole. The thin sheet of the outer magnetic conductor 103 is wrapped around the outer ring magnet 102. The magnetic wall of the inner magnetic conductor 104 is connected to the N pole, and the magnetic wall of the outer magnetic conductor 103 is connected to the S pole. The length of the thin-walled tube of the outer magnetic conductor 103 is the sum of the height of the ring magnet 102 and the length of the coil frame 111. The tube wall of the inner magnetic conductor 104 expands outward from 2h by 1 / 3r width to engage the cylindrical magnet 101.

[0065] When r≥20mm, the outer thin-walled tube of the internal magnetic conductor 104 also narrows inward by 1 / 3r width from 2h, so that the space for placing the coil frame 111 is kept as a narrow slit of 0-7mm, so as to avoid noise caused by large swaying gap when the coil frame 111 moves back and forth in it. A tower-shaped limiting spring 105 is provided at the lower end of the thin wall of the internal magnetic conductor 104, which plays the role of limiting and shock absorption of the coil frame 111, effectively avoiding safety hazards caused by collision.

[0066] The coil frame 111 is an aluminum sleeve with slits in the tube wall. Symmetrical stiffening ribs are set at a certain distance at 1 / 2 of the sleeve to separate the two sets of coils. The structure of the coil frame 111 can effectively reduce eddy current loss and has the characteristics of excellent heat dissipation and light weight. The coil material is copper-clad aluminum wire. A 30° inclined hollow support slope extends from one side of the sleeve and is fixedly connected to the circular buckle 113 with an inwardly contracting structure. The circular buckle 113 and the protrusion in the central part of the diaphragm body 3 are engaged and installed, forming the motion oscillation part in the electromagnetic drive device.

[0067] Based on COMSOL Multiphysics multiphysics coupling simulation, excitation signals of the same frequency were applied to an electromagnetic drive component (disclosed in CN113090511A) with the same geometric parameters and the electromagnetic drive device of this invention, respectively. The simulation results were analyzed, and the current required for the electromagnetic drive component (disclosed in CN113090511A) and the electromagnetic drive device (this invention) to reach the peak electromagnetic force was plotted as a curve, as shown below. Figure 13 As shown, combining the theoretical formula for electromagnetic drive power consumption within a single cycle:

[0068]

[0069] Where: W - power consumption, Z - electromagnetic impedance, I - current through the coil, t n -The nth current cycle,

[0070] It can be calculated that under the same impedance parameters, in this simulation with an impedance of 20Ω, the power consumption of the electromagnetic drive device per cycle is about 1.59W, and the power consumption of the electromagnetic drive component (disclosed by CN113090511A) per cycle is about 10.27W. The electromagnetic drive device used in this invention can reduce power consumption by 84.5%.

[0071] The reasons are as follows: The iron core in the electromagnetic drive assembly (disclosed in CN113090511A) is relatively heavy, while in the electromagnetic drive device of the present invention, the coil frame 111 is lighter than the iron core of the magnet due to the characteristics of aluminum material and hollowed-out tube wall. Therefore, it requires less energy for reciprocating motion. The simulation calculation results prove the advantage of the electromagnetic drive device of the present invention in terms of power consumption.

[0072] The stirring assembly includes a through rod 501 and rotating blades 5. The lower half of the reaction chamber 7 is a conical cavity with a constricted opening facing downwards and connected to a second pump outlet pipe 8. A slow-flow curved platform 6 is installed in the conical cavity, with the edge of the slow-flow curved platform 6 higher than the maximum diameter of the conical cavity. The axis of the slow-flow curved platform 6 is on the same axis as the axis of the conical cavity. The slow-flow curved platform 6 has a central concave shape and a convex structure around the perimeter. The central concave part of the slow-flow curved platform 6 is fixedly installed to the lower end of the through rod 501, allowing liquid to flow from the central concave part to the convex perimeter, and then flow into the lower half through the gap between the slow-flow curved platform 6 and the reaction chamber 7 until it flows out of the second pump outlet pipe 8. The rotating blades 5 are movably disposed in the lower half of the through rod 501 and are located between the upper end face of the reaction chamber 7 and the slow-flow curved platform 6. The diameter of the rotating blades 5 is smaller than the diameter of the circle enclosed by the highest point of the slow-flow curved platform 6. The tail end of the rotating blades 5 is spirally distributed relative to the through rod 501.

[0073] It should be noted that the process of water flowing from the upper surface of the reaction chamber 7 to the slow-flow curved platform 6 increases the water pressure, thereby enabling different liquids to fully mix and react under working conditions. The rotating blades 5 of the reaction chamber 7 also serve the same purpose. At the same time, in order to prevent the generation of precipitated flocculent impurities when different liquids are mixed and pumped into the reaction chamber 7 for reaction, the center of the slow-flow curved platform 6 is set to be concave, so that the sediment can settle here. In addition, the rotating blades 5 have an inclination angle of not less than 20°, which allows them to rotate in one direction under the impact of water flow.

[0074] The main chamber 4 is disc-shaped, and the first pump outlet pipe 443 is located in the center of the main chamber 4. The main chamber 4 is integrally injection molded, and each of the sub-chambers 442 is provided with a water inlet 441, which is connected to the pump inlet pipe 11. The three sub-chambers 442 share a common water outlet, which is connected to the first pump outlet pipe 443. The cavity wall between each water inlet 441 and the sub-chamber 442 is provided with a beveled cut (it should be noted that the cavity wall is relatively thin and deformable here). Each pump... One end of the inlet valve 401 is adhered and fixed to the inner wall of the chamber 442. When water flows in, the inlet valve 401 opens and closes in one direction. Each of the first pump outlet pipes 443 is provided with a symmetrical support structure. The pump outlet valves 411 installed between each of the first pump outlet pipes 443 and the chamber 442 are two symmetrical pieces. The end of the pump outlet valve 411 is adhered and fixed to the support structure of the first pump outlet pipe 443. The support structure of the first pump outlet pipe 443 is provided with a unidirectional through hole in the center. One end of the through bar 201 is fixed in the hole.

[0075] It should be noted that the main chamber 4 is made of plastic, and the outlet is opened from the center of the main chamber 4 to one side. The diaphragm body 3 is installed on the opposite side of the main chamber 4 with a single-sided opening.

[0076] Using integral injection molding instead of separate component assembly of the main chamber 4 greatly improves its sealing performance and ensures dimensional accuracy. It also provides better high-precision assembly of other components. Injection molding process also has advantages such as high molding efficiency and flexibility.

[0077] In addition, all other components except the drive unit are made of plastic injection molding, especially curved and spherical structures, such as the leakage protection cavity 2 and the slow-flow curved platform 6, which can effectively prevent magnetic metal materials from interfering with the uniformity of the electromagnetic field.

[0078] Preferably, each of the pumping pipes 11 is provided with a solenoid valve 1102, the lower end of each pumping pipe 11 is connected to the inlet 441, each pumping pipe 11 is provided with a partition that divides the pumping pipe 11 into two, one side of the partition is provided with an opening and is engaged with the solenoid valve 1102, the bottom center of the inlet 441 connected to the lower end of the pumping pipe 11 is provided with a through one-way valve inlet 421 and is fixed to one end of the one-way valve 9, the other end of the one-way valve 9 is connected to the one-way valve outlet 4311 at the bottom of the chamber 442.

[0079] Furthermore, the pump inlet pipe 11 is also equipped with a filter screen 1101, which is located at the upper end of the solenoid valve 9. The filter screen 1101 is shaped like a frustum and has openings in its thin wall. The one-way valve 9 is equipped with a valve core 901. The inner wall of the transverse pipe of the one-way valve 9 is provided with a constriction, which is used to engage and block the constriction when the water flow pushes the valve core 901 to move in the direction of the constriction of the transverse pipe. When the valve core 901 moves away from the direction of the constriction of the transverse pipe, the spring provided inside the one-way valve 9 is used to prevent the valve core 901 from flowing out of the one-way valve 9.

[0080] Preferably, the upper part of the main chamber 4 is fixed with a cover plate 13 to a diaphragm body 3, and a leak-proof gasket 14 is provided at the gap between the cover plate 13 and the diaphragm body 3. The upper part of the main chamber 4 is also provided with a leakage protection chamber 2, which is connected to the main chamber 4 through the diaphragm body 3.

[0081] Preferably, the top of the leakage protection cavity 2 is provided with a coil frame mounting hole 201, and the side end of the leakage protection cavity 2 is provided with a first fixing hole 202. The bottom of the coil frame 111 is sleeved on the leakage protection cavity 2 through the coil frame mounting hole 201, and the circular buckle 113 at the lower end of the coil frame 111 is fixedly connected to the diaphragm body 3. The first fixing hole 202 is used to fix the leakage protection cavity 2 on the cover plate 13.

[0082] Furthermore, the cover plate 13 is provided with a plurality of second fixing holes 131 and a plurality of diaphragm mounting holes 132, and three diaphragm mounting holes 132 are arranged around one second fixing hole 131. The first fixing hole 202 and the second fixing hole 131 are installed by rivets. The cover plate 13 is pressed against the upper outer surface of the main body chamber 4. The diameter of the diaphragm mounting hole 132 is smaller than the diameter of the diaphragm body 3. The diaphragm body 3 is located between the cover plate 13 and the upper end of the main body chamber 4, and the edge of the diaphragm body 3 is pressed and installed.

[0083] Preferably, a cover 12 is installed on the top of the main chamber 4, and the cover 12 is used to cover the electromagnetic drive device 1 and the leakage protection chamber 2.

[0084] Preferably, a power module 10 is also installed at the top center of the main chamber 4. The plunger 1103 on the solenoid valve 1102 is electrically connected to the power module 10 via a wire, and the power module 10 is also electrically connected to the coil 112 via a wire to supply power to the electromagnetic drive device 1. The control system flow between the power module 10 and the device it supplies is as follows: after the power module is turned on, the working status is detected. If there is leakage, the solenoid valve 1102 will be opened, the plunger 1103 will move outward conductively, and the electromagnetic drive device 1 will be de-energized. If there is no leakage, the solenoid valve 1102 will remain closed and the electromagnetic drive device 1 will remain open. If it is necessary to control the flow rate of different liquids, different frequencies of current can be supplied to the electric drive device 1. The sensors and control chips used for status detection are not within the scope of this invention and should be selected according to existing inventions for specific working conditions.

[0085] The working principle of this embodiment is as follows:

[0086] Taking a single chamber 442 and pump inlet pipe 11 as an example, liquid is first drawn from the pump inlet pipe 11. The liquid first passes through the filter screen 1101 to remove larger impurities to avoid affecting the operation of the pump inlet diaphragm valve 401. The solenoid valve 1102 is normally in the open state, and the liquid flows to the inlet 441. The power module 10 supplies power to the coil 112, so that there is current in the coil 112. Because there is a magnetic field from the center outward in the narrow gap between the internal magnetic conductor 104 and the external magnetic conductor 103, according to the law of magnetic fields, when the current flows clockwise in the coil 112, the force on the coil 112 is upward, pushing the entire coil frame 111 upward. As the coil frame 111 moves upward, the ring buckle 113 connects to the upper end of the diaphragm body 3. The downward movement of the coil frame 111 causes the diaphragm body 3 to deform and stretch upward, increasing the internal space of the chamber 442. The internal suction and external water pressure together push the pump inlet valve 401 to open, allowing liquid to enter the chamber 442. The limiting spring 105 in the electromagnetic drive device 1 prevents the coil frame 111 from moving upward beyond the narrow slit length and colliding with the ring magnet 102. Then, a counterclockwise current is passed through the coil 112, causing the coil frame 111 to move downward. The diaphragm body 3 deforms and compresses downward, and the water pressure impacts the pump outlet valve 411 to open, allowing liquid to flow into the first pump outlet pipe 443.

[0087] Because the electromagnetic drive is in a synchronous state under normal conditions, the liquids in the three chambers 442 will be pumped out into the first pumping pipe 443 simultaneously. The water flows downward, and the water pressure then drives the rotating blade 5 to rotate, causing the liquid to flow from the center to both sides in the reaction chamber 7. If three different liquids are pumped in and they can produce a certain reaction, the slow-flow curved platform 6 can make the three different liquids fully mix and react. If they are the same liquid, the slow-flow curved platform 6 can only play a slow-flowing role. Afterward, the liquid flows out from the gap between the slow-flow curved plane 6 and the inner wall of the reaction chamber 7 and is pumped out through the second pumping pipe 8.

[0088] In special circumstances: When the liquid flow rate is high, causing the water pressure at the inlet 441 to always be greater than that in the compartment 442, the pump-in membrane valve 401 cannot close. Some of the liquid in the inlet 441 enters the check valve 9 through the check valve inlet 421, pushing the valve core 901 in the check valve 9 to the right. As a result, the liquid enters the compartment 442 through the check valve outlet 431, achieving a balance between the internal and external water pressures.

[0089] When the leak-proof gasket 14 ages or the diaphragm 3 is damaged, causing liquid leakage, the leakage protection chamber 2 first prevents the liquid from contacting the electromagnetic drive device 1. After being detected, it then separately stops the current flowing through the coil 112 in the electrical drive device 1 corresponding to the damaged diaphragm 3, triggering the solenoid valve 1102 in the pump inlet pipe 11 to operate. The plunger 1103 pushes outward to close the solenoid valve 1102, and the liquid stops entering the inlet 441. At the same time, the other chambers 442 and their corresponding diaphragms 3 can still work normally. When the electromagnetic drive device 1 stops moving, causing the diaphragm 3 to stop, the liquid in the first pump outlet pipe 443 cannot push the pump outlet diaphragm valve 411 to open or close. Therefore, the liquid pumping into or out of the other chambers 442 is independent before the first pump outlet pipe 443. The fault leakage protection chamber 2 will not cause the entire diaphragm pump to stop working.

[0090] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic diaphragm pump, characterized in that: It includes a main chamber, a diaphragm body, a pump inlet pipe, a first pump outlet pipe, a reaction chamber, and several electromagnetic drive devices; The main chamber is divided into several sub-chambers, each of which is equipped with a membrane valve, and the number of sub-chambers is the same as the number of electromagnetic drive devices; Each of the electromagnetic drive devices includes an internal magnetic conductor and an external magnetic conductor. A limiting spring is provided at the lower end of the internal magnetic conductor. A coil frame is installed in the gap between the internal magnetic conductor and the external magnetic conductor. A coil is installed on the coil frame. When the coil is energized and drives the coil frame to move upward in the magnetic field, the limiting spring plays a role in limiting and shock absorption of the coil frame, which can effectively avoid safety hazards caused by collisions. The bottom of the coil frame is connected to the diaphragm body, and the diaphragm body is positioned above the chamber. Each of the sub-chambers is connected at one end to a pump inlet pipe and at the other end to a first pump outlet pipe. The other ends of several first pump outlet pipes are connected to the reaction chamber. The interior of the reaction chamber is provided with a slow-flow curved platform. A stirring assembly is provided between the top of the slow-flow curved platform and the first pump outlet pipe located in the center of the main chamber for stirring and mixing the substances from each sub-chamber in the reaction chamber.

2. The electromagnetic diaphragm pump according to claim 1, characterized in that: Each of the sub-chambers and the pump inlet pipe is provided with a one-way valve at its bottom. The membrane valve includes a pump inlet membrane valve and a pump outlet membrane valve. Each of the sub-chambers and the pump inlet pipe is provided with a pump inlet membrane valve, and each of the sub-chambers and the first pump outlet pipe is provided with a pump outlet membrane valve.

3. The electromagnetic diaphragm pump according to claim 1, characterized in that: The electromagnetic drive device also includes a cylindrical magnet and a ring magnet. The cylindrical magnet is nested and fixed on the ring magnet. The outer magnetic conductor wraps around the ring magnet and is installed in contact with the upper end of the cylindrical magnet, presenting the S pole. The top of the inner magnetic conductor is in contact with the lower end of the cylindrical magnet, presenting the N pole. The magnetic field B generated by the inner and outer magnetic conductors is directed outward. When current is passed through the coil in a counterclockwise direction, the magnetic force F on the coil is directed downward.

4. The electromagnetic diaphragm pump according to claim 2, characterized in that: The stirring assembly includes a through rod and rotating blades. The lower half of the reaction chamber is a conical cavity with a constricted opening facing downwards and connected to a second pump outlet pipe. A slow-flow curved platform is installed in the conical cavity, with its edge higher than the maximum diameter of the conical cavity. The axis of the slow-flow curved platform is on the same axis as the axis of the conical cavity. The slow-flow curved platform has a central concave shape and a convex structure around it. The central concave part of the slow-flow curved platform is fixedly installed to the lower end of the through rod, allowing liquid to flow from the central concave to the convex parts around it, and then flow into the lower half through the gap between the slow-flow curved platform and the reaction chamber until it flows out of the second pump outlet pipe. The rotating blades are movably disposed in the lower half of the through rod and located between the upper end face of the reaction chamber and the slow-flow curved platform. The diameter of the rotating blades is smaller than the diameter of the circle enclosed by the highest point of the slow-flow curved platform. The tail end of the rotating blades is spirally distributed relative to the through rod.

5. The electromagnetic diaphragm pump according to claim 4, characterized in that: The main chamber is divided into three sub-chambers, and the pump inlet pipes connected to the three sub-chambers are distributed at 120° on the outer ring of the main chamber. There are also three electromagnetic drive devices.

6. The electromagnetic diaphragm pump according to claim 5, characterized in that: The main chamber is integrally injection molded, and each of the sub-chambers is provided with a water inlet, which is connected to the pump inlet pipe. The three sub-chambers share a common water outlet, which is connected to the first pump outlet pipe. The cavity wall between each water inlet and the sub-chamber is provided with a bevel. One end of each pump inlet membrane valve is adhered and fixed to the inner wall of the sub-chamber, so that the pump inlet membrane valve can open and close in one direction when water flows in. Each first pump outlet pipe is provided with a symmetrical support structure. The pump outlet membrane valves installed between each first pump outlet pipe and the sub-chamber are two symmetrical pieces. The ends of the pump outlet membrane valves are adhered and fixed to the support structure of the first pump outlet pipe. The support structure of the first pump outlet pipe is provided with a unidirectional through hole in the center, and one end of the through bar is fixed in the hole.

7. The electromagnetic diaphragm pump according to claim 6, characterized in that: Each of the pumping pipes is equipped with a solenoid valve. The lower end of each pumping pipe is connected to the water inlet. Each pumping pipe is equipped with a partition that divides the pumping pipe into two parts. One side of the partition has an opening and is engaged with the solenoid valve. The bottom center of the water inlet connected to the lower end of the pumping pipe is provided with a through one-way valve inlet and is fixed to one end of the one-way valve. The other end of the one-way valve is connected to the one-way valve outlet at the bottom of the partition chamber.

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