Horizontal motor-driven micro diaphragm metering pump

Abstract

The utility model discloses a horizontal motor-driven miniature diaphragm metering pump, which relates to the technical field of diaphragm pumps and comprises a pump head and a shell, a diaphragm is fixedly mounted between the pump head and the shell, and an end cover is fixedly mounted on the rear side of the shell. The device further comprises a curved-surface barrel, the curved-surface barrel is in transmission connection with the diaphragm, the curved-surface barrel is slidably installed in the shell, an annular groove is formed in the front side of the curved-surface barrel, a spring is installed in the annular groove, the front end of the spring abuts against the front side in the shell, and the front end of the spring abuts against the front side in the shell. And a plurality of cambered surfaces are circumferentially arranged on the rear side of the curved-surface barrel at equal intervals. By controlling the rotating angle of the synchronous motor, the moving distance of the ball bearing on the cambered surface can be accurately controlled, the stroke distance of the curved-surface barrel can be accurately adjusted, then the liquid pumping and pumping quantity can be accurately controlled, and compared with an existing diaphragm pump of an electromagnet structure, the diaphragm pump has the advantages of being more accurate and efficient.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a horizontal motor-driven micro diaphragm metering pump. Background Technology

[0002] Diaphragm pumps generally consist of an actuator and valves. Based on the power source used by the actuator, diaphragm pumps can be divided into three types: pneumatic, electric, and hydraulic. Pneumatic diaphragm pumps use compressed air as their power source, electric diaphragm pumps use electricity as their power source, and hydraulic diaphragm pumps use the pressure of a liquid medium (such as oil) as their power source.

[0003] Currently, most commercially available electric diaphragm pumps use crank connecting rods or electromagnets to drive the diaphragm to move back and forth. Crank connecting rods are mostly used in large diaphragm pumps, while electromagnets are used for small diaphragm pumps. However, electromagnets have the problem of difficulty in controlling the amplitude of diaphragm movement, which can easily lead to insufficient accuracy. Therefore, in order to solve the aforementioned problems, we propose a horizontal motor-driven micro diaphragm metering pump. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies in the existing technology by proposing a horizontal motor-driven micro diaphragm metering pump.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A horizontal motor-driven miniature diaphragm metering pump includes a pump head and a housing, wherein a diaphragm is fixedly installed between the pump head and the housing, and an end cap is fixedly installed on the rear side of the housing.

[0007] It also includes a curved barrel, which is connected to the diaphragm in a transmission manner. The curved barrel is slidably installed inside the housing. An annular groove is provided on the front side of the curved barrel. A spring is installed inside the annular groove. The front end of the spring abuts against the front side inside the housing. Multiple arc surfaces are provided at equal intervals around the rear side of the curved barrel.

[0008] A synchronous motor is fixedly installed on the rear side of the end cap. The output end of the synchronous motor extends into the interior of the housing and is fixedly installed with a rotating drum. Multiple mounting rods are fixedly installed at equal intervals around the outer surface of the rotating drum. The number of mounting rods is the same as the number of arc surfaces. Ball bearings are fixedly installed on the outer surface of each mounting rod, and the outer surface of the ball bearings abuts against the arc surfaces.

[0009] Furthermore, a connecting rod is fixedly installed at the front end of the curved barrel, the front end of the connecting rod extends to the front side of the diaphragm and is threaded with a locking nut, and a baffle is fixedly installed on the outer surface of the connecting rod, the baffle being located at the rear side of the diaphragm.

[0010] Furthermore, an outlet pipe and an inlet pipe are fixedly installed on the upper and lower sides of the pump head, respectively. A one-way valve is fixedly installed inside both the outlet pipe and the inlet pipe. Both the outlet pipe and the inlet pipe are located on the front side of the diaphragm.

[0011] Furthermore, a thrust ball bearing is fixedly installed between the rear side of the rotating drum and the front side of the end cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, by controlling the rotation angle of the synchronous motor, can precisely control the movement distance of the ball bearing on the arc surface, thereby precisely adjusting the stroke distance of the curved barrel and thus precisely controlling the extraction and pumping volume of liquid. Compared with the existing diaphragm pump with an electromagnet structure, it has more precise and efficient characteristics. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is an exploded view of part of the structure of this utility model;

[0018] Figure 4 This is a perspective view of a partial structure of the present invention.

[0019] In the diagram: 1. Pump head; 2. Housing; 3. Outlet pipe; 4. Inlet pipe; 5. End cap; 6. Synchronous motor; 7. Diaphragm; 8. Curved barrel; 9. Connecting rod; 10. Locking nut; 11. Spring; 12. Rotary drum; 13. Ball bearing; 14. Thrust ball bearing; 15. Mounting rod; 16. Arc surface. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0021] Reference Figure 1-4A horizontal motor-driven micro diaphragm metering pump includes a pump head 1 and a housing 2. A diaphragm 7 is fixedly installed between the pump head 1 and the housing 2. An end cap 5 is fixedly installed on the rear side of the housing 2. The pump head 1 also includes a curved barrel 8, which is connected to the diaphragm 7. The curved barrel 8 is slidably installed inside the housing 2. An annular groove is provided on the front side of the curved barrel 8. A spring 11 is installed inside the annular groove. The front end of the spring 11 abuts against the front side of the interior of the housing 2. Multiple arc surfaces 16 are provided at equal intervals on the rear side of the curved barrel 8. A synchronous motor 6 is fixedly installed on the rear side of the end cap 5. The output end of the synchronous motor 6 extends into the interior of the housing 2 and is fixedly installed on a rotating drum 12. Multiple mounting rods 15 are fixedly installed at equal intervals on the outer surface of the rotating drum 12. The number of mounting rods 15 is the same as the number of arc surfaces 16. Ball bearings 13 are fixedly installed on the outer surface of each mounting rod 15. The outer surface of the ball bearings 13 abuts against the arc surfaces 16. The pump head 1 has an outlet pipe 3 and an inlet pipe 4 fixedly installed on its upper and lower sides, respectively. Both the outlet pipe 3 and the inlet pipe 4 have a one-way valve fixedly installed inside them. Both the outlet pipe 3 and the inlet pipe 4 are located in front of the diaphragm 7.

[0022] When the synchronous motor 6 starts, it can drive the rotating drum 12 to rotate. The rotating drum 12 will drive the ball bearing 14 to move against the arc surface 16 through the multiple mounting rods 15 on the outer surface. Since the curved barrel 8 is slidably installed inside the housing 2 and the position of the rotating drum 12 is fixed, as the ball bearing 14 gradually rotates to the highest point of the arc surface 16, the curved barrel 8 will be continuously pushed forward by the ball bearing 14. At this time, the spring 11 is continuously compressed, and the curved barrel 8 will push the diaphragm 7 to bulge forward.

[0023] As the ball bearing 14 moves, it will gradually rotate to the lowest point of the arc surface 16. At this time, the spring 11 is released, pushing the curved barrel 8 to move backward continuously. The curved barrel 8 will pull the diaphragm 7 to bulge backward. By continuously repeating the above process, the diaphragm 7 can be continuously bulged back and forth, thereby realizing the continuous change of the internal pressure of the pump head 1, and thus realizing the extraction and pumping of water.

[0024] The one-way valves inside the outlet pipe 3 and the inlet pipe 4 allow for one-way flow of water inside the pump head 1.

[0025] By controlling the rotation angle of the synchronous motor 6, the travel distance of the curved barrel 8 can be precisely controlled, thereby precisely controlling the extraction and pumping volume of liquid, thus achieving a precise and efficient effect.

[0026] A connecting rod 9 is fixedly installed at the front end of the curved barrel 8. The front end of the connecting rod 9 extends to the front side of the diaphragm 7 and is threaded with a locking nut 10. A baffle is fixedly installed on the outer surface of the connecting rod 9, and the baffle is located at the rear side of the diaphragm 7.

[0027] The curved barrel 8 can drive the diaphragm 7 to continuously oscillate back and forth via the connecting rod 9. The diaphragm 7 can be easily disassembled from the connecting rod 9 by the locking nut 10, making it easy to replace the diaphragm 7.

[0028] A thrust ball bearing 14 is fixedly installed between the rear side of the rotating drum 12 and the front side of the end cover 5. The installation of the thrust ball bearing 14 makes the rotating drum 12 more stable when rotating.

Claims

1. A horizontal motor-driven micro diaphragm metering pump, comprising a pump head (1) and a housing (2), wherein a diaphragm (7) is fixedly installed between the pump head (1) and the housing (2), and an end cap (5) is fixedly installed on the rear side of the housing (2); Its features are, It also includes a curved barrel (8), which is connected to the diaphragm (7) in a transmission manner. The curved barrel (8) is slidably installed inside the housing (2). An annular groove is provided on the front side of the curved barrel (8). A spring (11) is installed inside the annular groove. The front end of the spring (11) abuts against the front side inside the housing (2). Multiple arc surfaces (16) are provided on the rear side of the curved barrel (8) at equal intervals. A synchronous motor (6) is fixedly installed on the rear side of the end cap (5). The output end of the synchronous motor (6) extends into the interior of the housing (2) and is fixedly installed with a rotating drum (12). Multiple mounting rods (15) are fixedly installed equidistantly on the outer surface of the rotating drum (12). The number of mounting rods (15) is the same as the number of arc surfaces (16). Ball bearings (13) are fixedly installed on the outer surface of each mounting rod (15). The outer surface of the ball bearings (13) abuts against the arc surfaces (16).

2. A horizontal motor-driven micro diaphragm metering pump according to claim 1, characterized in that, A connecting rod (9) is fixedly installed at the front end of the curved barrel (8). The front end of the connecting rod (9) extends to the front side of the diaphragm (7) and is threaded with a locking nut (10). A baffle is fixedly installed on the outer surface of the connecting rod (9) and the baffle is located on the rear side of the diaphragm (7).

3. A horizontal motor-driven micro diaphragm metering pump according to claim 1, characterized in that, The pump head (1) is fixedly installed with an outlet pipe (3) and an inlet pipe (4) on its upper and lower sides respectively. A one-way valve is fixedly installed inside the outlet pipe (3) and the inlet pipe (4). The outlet pipe (3) and the inlet pipe (4) are both located in front of the diaphragm (7).

4. A horizontal motor-driven micro diaphragm metering pump according to claim 1, characterized in that, A thrust ball bearing (14) is fixedly installed between the rear side of the rotating drum (12) and the front side of the end cover (5).

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