Electromagnetic pump based on displacement sensing closed-loop control

Abstract

The utility model discloses an electromagnetic pump based on displacement sensing closed-loop control. The electromagnetic pump comprises a shell, an iron core set arranged in the shell, a pump body reciprocating assembly connected with the iron core set and a cover body detachably connected with the shell. The pump body reciprocating assembly comprises a reciprocating structural part and a fixing shell for fixing the reciprocating structural part. The iron core part comprises a photoelectric sensing assembly for detecting the reciprocating period of the reciprocating structural part in unit time. Through full-period monitoring of the reciprocating rectilinear motion structural member, filling metering can be accurately reflected for rectilinear displacement, so that the operation life of the whole machine and the operation life of a diaphragm are prolonged, and the betting efficiency in unit time is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic pumps, in particular to an electromagnetic pump based on displacement sensing closed-loop control. Background Art

[0002] An electromagnetic pump is a pump that uses electromagnetic force to drive the flow of liquid and maintains stable flow and pressure through overflow control. It is widely used in industrial, medical, laboratory and other occasions that require precise liquid control.

[0003] Existing conventional electromagnetic pumps are generally equipped with brushless DC motors, servo motors, stepper motors, etc., and are internally set with motor rotation encoders for control. This control mode realizes the number of motor rotations or actual steps.

[0004] However, in the actual field of digital pumps, where precise metering and filling are required, the actual reciprocating distance of the pump group is the direct condition for the filling amount. The single control of the number of rotations of the drive motor often ignores the transmission group gap, matching machinery, etc. In this context, the actual linear displacement of the reciprocating parts is required to accurately reflect the filling metering and realize the full cycle process control of the filling. Utility Model Content

[0005] The present application provides an electromagnetic pump based on displacement sensing closed-loop control. By performing full-cycle monitoring of reciprocating linear motion structural parts, the linear displacement can be accurately reflected in the filling metering, thereby increasing the operating life of the entire machine, the operating life of the diaphragm, and the injection efficiency per unit time.

[0006] The present application provides an electromagnetic pump based on displacement sensing closed-loop control, comprising a housing, an iron core group built into the housing, a pump body reciprocating assembly connected to the iron core group, and a cover body detachably connected to the housing; the iron core group comprises a rotating part, a rotating shaft passing through the rotating part, and a fixed part connected to the rotating shaft; the fixed part comprises a disc part and a limiting protrusion arranged at the edge of the disc part; the pump body reciprocating assembly comprises a reciprocating structural part connected to the rotating part and a fixed shell for fixing the reciprocating structural part; the iron core group also comprises a photoelectric sensing assembly for detecting the reciprocating period of the reciprocating structural part per unit time.

[0007] Optionally, the photoelectric sensor assembly includes a fixed plate and a photoelectric sensor transmitter and a photoelectric sensor receiver arranged on the fixed plate, and the fixed plate is arranged on the side of the limiting protrusion facing the rotating part; the emitting direction of the photoelectric sensor transmitter is toward the direction of the reciprocating structure; and the receiving direction of the photoelectric sensor receiver is toward the direction of the reciprocating structure.

[0008] Optionally, at least one first threaded hole is provided on the fixing plate, and a second threaded hole communicating with the threaded hole is provided on the limiting protrusion; a bolt is provided on the fixing plate, and the bolt passes through the first threaded hole and the second threaded hole at the same time.

[0009] Optionally, a reflective plate is fixedly provided on one side of the reciprocating structure; the reciprocating motion trajectory of the reflective plate is at the irradiation position corresponding to the photoelectric sensor component, the reflective mirror surface on the reflective plate faces the emission direction of the photoelectric sensor transmitter and the receiving direction of the photoelectric sensor receiver, and the outer shell is covered with a positioning shell on the rotating part, and the positioning shell is also provided with an avoidance hole for the transmission of optical signals of the photoelectric sensor transmitter and the photoelectric sensor receiver.

[0010] Optionally, a control panel electrically connected to the photoelectric sensor assembly is provided on the cover.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0012] 1. This application monitors the periodic working conditions of reciprocating structural parts by setting up photoelectric sensor components, performs full-cycle monitoring of the reciprocating linear motion in the electromagnetic pump, and controls the main board to implement a software compensation algorithm by comparing the actual displacement with the working condition requirements; thereby achieving real-time correction and increase or decrease of the motor's compensation pulses to achieve consistency in the actual intake and discharge volumes of each stroke, so that the added solution meets the high-precision requirements of the added solute concentration.

[0013] 2. The present application adopts the method of providing a first threaded hole and a second threaded hole on the fixing plate and the limiting protrusion, and passing the bolt through the first threaded hole and the second threaded hole at the same time, thereby improving the installation stability of the photoelectric sensor component.

[0014] 3. This application adopts an avoidance hole provided in the fixing part for the transmission of light signals from the photoelectric sensor transmitter and the photoelectric sensor receiver, which helps the reciprocating motion trajectory of the reflector to be at the irradiation position corresponding to the photoelectric sensor component, and makes the reflective mirror surface on the reflector face the receiving direction of the photoelectric sensor receiver, thereby improving the accuracy of the periodic working conditions of the reciprocating structural parts, accurately improving the reaction filling metering, and improving the injection efficiency per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic pump based on displacement sensing closed-loop control in an embodiment of the present application;

[0017] Figure 2 Schematic diagram of the explosion structure of the electromagnetic pump based on displacement sensing closed-loop control in an embodiment of the present application;

[0018] Figure 3 Schematic diagram of the explosion structure of the electromagnetic pump based on displacement sensing closed-loop control in an embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of a partial explosion amplification structure of an electromagnetic pump based on displacement sensing closed-loop control in an embodiment of the present application;

[0020] Figure 5 This is a schematic diagram of the connection structure between the core group and the pump body reciprocating assembly in the embodiment of the present application;

[0021] Figure 6 Schematic diagram of the cross-sectional structure of an electromagnetic pump based on displacement sensing closed-loop control in an embodiment of the present application.

[0022] Explanation of the accompanying drawings: 1. Outer shell; 11. Positioning shell; 111. Avoidance hole; 2. Iron core group; 21. Rotating part; 22. Rotating shaft; 23. Fixed part; 231. Disc part; 232. Limiting protrusion; 24. Photoelectric sensor assembly; 241. Fixed plate; 242. Photoelectric sensor transmitter; 243. Photoelectric sensor receiver; 245. Second threaded hole; 246. Bolt; 3. Pump body reciprocating assembly; 31. Reciprocating structural member; 311. Reflector; 32. Fixed shell; 4. Cover body; 41. Control panel. DETAILED DESCRIPTION

[0023] The present application provides an electromagnetic pump based on displacement sensing closed-loop control. By performing full-cycle monitoring of reciprocating linear motion structural parts, the linear displacement can be accurately reflected in the filling metering, thereby increasing the operating life of the entire machine, the operating life of the diaphragm, and the injection efficiency per unit time.

[0024] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0026] Reference Figure 1 and Figure 2 In this embodiment, an electromagnetic pump based on displacement sensing closed-loop control includes a shell 1, an iron core group 2 built into the shell 1, a pump body reciprocating assembly 3 connected to the iron core group 2, and a cover body 4 detachably connected to the shell 1.

[0027] Reference Figure 3 The core group 2 includes a rotating member 21, a rotating shaft 22 passing through the rotating member 21, and a fixing member 23 connected to the rotating shaft 22. Figure 4 and Figure 5 The pump body reciprocating assembly 3 includes a reciprocating structural member 31 connected to the rotating member 21 and a fixed shell 32 for fixing the reciprocating structural member 31.

[0028] The fixing member 23 includes a disc member 231 and a limiting protrusion 232 provided at the edge of the disc member 231. In this embodiment, the core assembly also includes a photoelectric sensor assembly 24 for detecting the reciprocating period of the reciprocating structural member 31 per unit time. In this application, by providing the photoelectric sensor assembly 24, the periodic working condition of the reciprocating structural member 31 is monitored, and the reciprocating linear motion in the electromagnetic pump is monitored throughout the entire cycle. By comparing the actual displacement with the working condition requirements, the control mainboard implements the software compensation algorithm; thereby achieving real-time correction and increase or decrease of the motor compensation pulse, achieving consistency in the actual intake and discharge volumes of each stroke, and ensuring that the added solution meets the requirements of high-precision solute concentration.

[0029] This solution enables the electromagnetic pump to smoothly transition between speed increases and decreases during operation, reduces operational impact, and increases the operational life of the entire machine and the diaphragm. Furthermore, by monitoring the reciprocating cycle of the reciprocating structural member 31 per unit time, high-speed operation can be employed during the low-load suction stroke, thereby improving injection efficiency per unit time.

[0030] Furthermore, in the present application, the photoelectric sensor assembly 24 includes a fixed plate 241, and a photoelectric sensor transmitter 242 and a photoelectric sensor receiver 243 disposed on the fixed plate 241. The fixed plate 241 is disposed on the side of the stopper protrusion 232 facing the rotating member 21; the photoelectric sensor transmitter 242 transmits signals in the direction of the reciprocating structure 31; and the photoelectric sensor receiver 243 receives signals in the direction of the reciprocating structure 31.

[0031] Combine Figure 4 The fixing plate 241 is provided with two first threaded holes (not shown), and the limiting protrusion 232 is provided with a second threaded hole 245 that communicates with the threaded holes. In addition, the fixing plate 241 is provided with a bolt 246 that passes through both the first threaded hole and the second threaded hole 245, thereby securing the fixing plate 241 to the limiting protrusion 232, thereby improving the installation stability of the photoelectric sensor assembly 24.

[0032] Combine Figure 5 A reflector 311 is fixedly mounted on one side of the reciprocating structure 31; the reflector 311 moves as the reciprocating structure 31 moves. Furthermore, the reciprocating motion trajectory of the reflector 311 is located at the corresponding illumination position of the photoelectric sensor assembly, and the reflective surface of the reflector 311 faces the emission direction of the photoelectric sensor transmitter 242 and the reception direction of the photoelectric sensor receiver 243.

[0033] In addition, combined Figure 6 The outer shell 1 is covered with a positioning shell 11 on the rotating part 21. The positioning shell 11 is also provided with an avoidance hole 111 for the transmission of light signals from the photoelectric sensor transmitter 242 and the photoelectric sensor receiver 243, thereby helping the reciprocating motion trajectory of the reflector 311 to be at the irradiation position corresponding to the photoelectric sensor component, and making the reflective mirror surface on the reflector 311 face the receiving direction of the photoelectric sensor receiver 243, thereby improving the accuracy of the periodic working condition of the reciprocating structure 31, improving the reaction filling metering, and thus improving the injection efficiency per unit time.

[0034] In addition, in the embodiment of the present application, the cover body 4 is provided with a control panel 41 electrically connected to the photoelectric sensor component 24, so that the displacement of the reciprocating structure 31 can be fully detected throughout the entire cycle, so that the reciprocating structure 31 can achieve the consistency of the actual intake and discharge volume in each stroke, so that the added solution meets the high-precision requirements of the added solute concentration.

[0035] It should be noted that the above-mentioned order of the embodiments of the present application is for descriptive purposes only and does not represent the superiority or inferiority of the embodiments. The above description is of specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

[0037] This specification and drawings are merely illustrative of the present application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Obviously, those skilled in the art may make various modifications and variations to this application without departing from the scope of this application. Thus, this application is intended to include such modifications and variations as fall within the scope of this application and its equivalents.

Claims

1. An electromagnetic pump based on displacement sensing closed-loop control, characterized in that: It comprises a housing (1), an iron core group (2) built into the housing (1), a pump body reciprocating assembly (3) connected to the iron core group (2), and a cover (4) detachably connected to the housing (1); The core assembly (2) comprises a rotating member (21), a rotating shaft (22) passing through the rotating member (21), and a fixing member (23) connected to the rotating shaft (22); the fixing member (23) comprises a disc member (231) and a limiting protrusion (232) provided at the edge of the disc member (231); The pump body reciprocating assembly (3) comprises a reciprocating structural member (31) connected to the rotating member (21) and a fixed shell (32) for fixing the reciprocating structural member (31); The iron core group (2) also includes a photoelectric sensor component (24) for detecting the reciprocating cycle of the reciprocating structural member (31) per unit time.

2. The electromagnetic pump based on displacement sensing closed-loop control according to claim 1, characterized in that: The photoelectric sensor assembly (24) includes a fixing plate (241) and a photoelectric sensor transmitter (242) and a photoelectric sensor receiver (243) arranged on the fixing plate (241). The fixing plates (241) are all arranged on a side of the limiting protrusion (232) facing the rotating member (21); The emission direction of the photoelectric sensor transmitter (242) is toward the direction of the reciprocating structure (31); and the receiving direction of the photoelectric sensor receiver (243) is toward the direction of the reciprocating structure (31).

3. The electromagnetic pump based on displacement sensing closed-loop control according to claim 2, characterized in that: At least one first threaded hole is provided on the fixing plate (241), and a second threaded hole (245) communicating with the threaded hole is provided on the limiting protrusion (232); a bolt (246) is provided on the fixing plate (241), and the bolt (246) passes through both the first threaded hole and the second threaded hole (245).

4. The electromagnetic pump based on displacement sensing closed-loop control according to claim 2, characterized in that: A reflector (311) is fixedly provided on one side of the reciprocating structural member (31); the reciprocating motion trajectory of the reflector (311) is at the irradiation position corresponding to the photoelectric sensor assembly (24), and the reflective mirror surface on the reflector (311) faces the emitting direction of the photoelectric sensor transmitter (242) and the receiving direction of the photoelectric sensor receiver (243). The housing (1) is covered with a positioning shell (11) on the rotating part (21), and the positioning shell (11) is also provided with an avoidance hole (111) for transmitting light signals from the photoelectric sensor transmitter (242) and the photoelectric sensor receiver (243).

5. The electromagnetic pump based on displacement sensing closed-loop control according to claim 1, characterized in that: The cover (4) is provided with a control panel (41) electrically connected to the photoelectric sensor component (24).

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