Super-wide-area self-adjustable high-accuracy magnetic conveying device

Abstract

The invention discloses an ultra-wide-area self-adjustable high-accuracy magnetic conveying device, and relates to the technical field of frequency converters, the ultra-wide-area self-adjustable high-accuracy magnetic conveying device comprises a high-speed motor, a frequency converter and a microcomputer circuit board, and an output shaft of the high-speed motor is fixedly connected with a high-speed pump through a coupler; an outlet or an inlet of the high-speed pump is provided with a mounting hole which can be used for screwing a plug-in flow meter, the inner side of the mounting hole is screwed with a temperature and pressure flow meter, and the outlet or the inlet of the high-speed pump is provided with a controllable electromagnetic valve. According to the super-wide-area self-adjustable high-accuracy magnetic conveying device, the pump operable efficient area can be expanded in a large range by changing the rotating speed of the water pump, the energy efficiency of equipment is improved, various conveying requirements can be met, multiple purposes are achieved through one machine, the core lies in application of the high-speed pump, and a single operation curve of a traditional water pump is converted into the efficient operation area; in addition, the rotating speed and the conveying flow of the pump are accurately controlled through the PID control technology, so that high-precision and high-stability conveying is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of frequency converters, in particular to an ultra-wide-range self-adjustable high-precision magnetic force conveying device. Background Art

[0002] Nowadays, conveying devices are widely used in industrial automation, material transportation and other fields. However, since traditional water pumps usually have a single operating curve, which means that their performance parameters (such as flow, head, efficiency, etc.) are optimized under specific working conditions, which limits their scope of application and efficiency performance. The high-efficiency zone is relatively limited and it is difficult to adapt to a variety of conveying needs. In practical applications, in order to meet different conveying needs, it is often necessary to replace different types of equipment, which increases equipment costs and maintenance costs. In addition, when the equipment operates outside the high-efficiency zone, its efficiency will drop significantly. This not only leads to increased energy consumption, but also damages the pump body itself and shortens its service life.

[0003] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing structure and shortcomings, and provides a high-precision magnetic conveying device that can be self-adjusted over an ultra-wide range. Summary of the invention

[0004] The object of the present invention is to provide a high-precision magnetic conveying device that is self-adjustable over an ultra-wide range to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-wide-range self-adjustable high-precision magnetic conveying device, comprising a high-speed motor, a frequency converter and a microcomputer circuit board, wherein the output shaft of the high-speed motor is fixedly connected to a high-speed pump via a coupling, and a mounting hole for screwing in an inserted flow meter is provided at the outlet or inlet of the high-speed pump, and a temperature and pressure flow meter is screwed on the inner side of the mounting hole, a controllable solenoid valve is installed at the outlet or inlet of the high-speed pump, and the controllable solenoid valve and the temperature and pressure flow meter are both preferentially fixed at the outlet of the high-speed pump, and the controllable solenoid valve and the temperature and pressure flow meter both have communication capabilities.

[0006] Furthermore, the fixed position of the controllable solenoid valve and the temperature and pressure flowmeter is preferably 3-5D away from the inlet or outlet of the high-speed pump, where D is the inner wall diameter of the pump body volute outlet pipe.

[0007] Furthermore, the temperature and pressure flowmeter is powered by wired means, and the temperature and pressure flowmeter communicates with the microcomputer circuit board by protocol communication, 0-5V analog signal or LoRa wireless communication, and the microcomputer circuit board supports programming and communication;

[0008] The protocol communication includes Modbus protocol or Hart protocol, as follows:

[0009] In the communication mode using the Modbus protocol, the temperature and pressure flow meter is connected to the microcomputer circuit board through a serial port (such as RS485) and transmits data according to the Modbus protocol;

[0010] In the communication mode using the Hart protocol, the temperature and pressure flowmeter transmits signals through a 4-20mA current loop and adds a digital signal to transmit additional information. At the same time, the microcomputer circuit board is equipped with a specific Hart communication module or converter;

[0011] The 0-5V analog signal transmits information by converting the change of physical quantity into the change of voltage signal. In the temperature and pressure flowmeter, the 0-5V analog signal is used to transmit the measured values ​​of flow, temperature, pressure, etc. The microcomputer circuit board receives these analog signals and performs analog-to-digital conversion (ADC) to obtain the measurement data of the flowmeter.

[0012] The LoRa wireless communication is suitable for occasions where wiring is difficult or remote monitoring is required. Through LoRa wireless communication, the temperature and pressure flow meter can wirelessly transmit the measurement data to the microcomputer circuit board to realize remote data collection and monitoring.

[0013] Furthermore, the high-speed pump is a magnetic pump, which is driven by a magnetic coupling and supports a wide range of working performance.

[0014] Furthermore, the high-speed motor is one of a permanent magnet synchronous motor or a three-phase asynchronous motor, and a permanent magnet synchronous motor is preferred, and a three-phase asynchronous motor is secondarily preferred. The high-speed motor supports 20-100HZ speed regulation.

[0015] Furthermore, the flange end face of the high-speed motor is installed on the pump connecting frame, and the foot of the high-speed motor is installed on the fixed end face.

[0016] Furthermore, the device is controlled in two steps, as follows:

[0017] S1. Demand entry:

[0018] The user applies to the system for instructions to be executed through interface operation or remote instructions;

[0019] After receiving the instruction, the microcomputer circuit board first matches the database pre-stored locally to match the closest execution parameters;

[0020] After matching the instruction, the control execution instruction is sent to the actuator (the frequency converter 5 and the controllable solenoid valve 1) and the execution is waited for completion;

[0021] S2. Calibration after execution:

[0022] The temperature and pressure sensor samples the real-time output status at high frequency and feeds back to the microcomputer circuit board;

[0023] The microcomputer circuit board compares the required performance with the sampled data and calculates the difference. It fine-tunes the opening of the controllable solenoid valve or the output frequency of the inverter according to the flow and pressure difference to approach the target parameters.

[0024] The above calibration operation is performed repeatedly to ensure that the device is always operating at the target performance during operation and the output performance will not be affected by changes in the production environment.

[0025] Furthermore, in step S1, the demand instruction includes basic information such as output pressure, output flow, output accuracy, and conveying medium.

[0026] Furthermore, in step S1, the execution parameters include information such as the inverter output frequency, the opening of the controllable solenoid valve, the output flow, the rotation speed, and the pressure.

[0027] The present invention provides a high-precision magnetic conveying device that can be self-adjusted over a wide range, having the following features:

[0028] Beneficial effects:

[0029] 1. The present invention can expand the high-efficiency operating area of ​​the pump in a wide range by changing the speed of the water pump, improve the energy efficiency of the equipment, adapt to various transportation needs, realize multi-purpose use of one machine, and thus reduce equipment cost and maintenance cost. The core lies in the application of high-speed pumps, which transforms the single operating curve of traditional water pumps into a high-efficiency operating domain. It uses the principle that when the speed of the water pump increases, its head and flow rate increase accordingly, but the efficiency curve changes. By accurately controlling the speed, the water pump can operate at a more efficient working point.

[0030] 2. The present invention uses PID control technology to accurately control the speed and delivery flow of the pump to achieve high-precision and high-stability delivery. Specifically, by receiving real-time feedback of delivery flow or pressure and other parameters, comparing with the set value, calculating the deviation, and calculating the corresponding control amount according to the size and change rate of the deviation, adjusting the speed of the pump, and continuously feedback and adjusting, so that the magnetic conveying device can achieve the predetermined delivery effect. This design not only improves the accuracy and stability of the magnetic conveying device, but also enhances the anti-interference ability and robustness of the equipment, while also simplifying the design of the control system and reducing the commissioning and maintenance costs.

[0031] In summary, the core innovations of the present invention are as follows:

[0032] 1. Expansion of efficient operation range: By changing the speed of high-speed pumps through variable frequency speed regulation technology, the single efficient operation curve of traditional water pumps is expanded to a wide range of efficient areas, significantly improving energy efficiency and adaptability.

[0033] 2. Closed-loop control mechanism: PID control combined with real-time calibration (temperature and pressure flow meter feedback and controllable solenoid valve adjustment) is used to achieve high-precision and high-stability transportation and has the ability to resist environmental interference.

[0034] 3. Integrated design: The temperature and pressure flow meter and the controllable solenoid valve are integrated at the pump outlet, which simplifies the structure and improves the real-time performance of data acquisition and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of a high-precision magnetic transport device that can be self-adjusted over an ultra-wide range according to the present invention;

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of a super wide-area self-adjustable high-precision magnetic transport device of the present invention;

[0037] Figure 3 A schematic diagram of a demand entry process of a high-precision magnetic conveying device with ultra-wide range and self-adjustability according to the present invention;

[0038] Figure 4 The figure is a schematic diagram of the calibration process after execution of a high-precision magnetic conveying device with ultra-wide range self-adjustment according to the present invention.

[0039] In the figure: 1. Controllable solenoid valve; 2. Temperature and pressure flow meter; 3. High-speed pump; 4. High-speed motor; 5. Frequency converter; 6. Microcomputer circuit board. DETAILED DESCRIPTION

[0040] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] like Figure 1-Figure 4 As shown, an ultra-wide-range self-adjustable high-precision magnetic conveying device includes a controllable solenoid valve 1, a temperature and pressure flowmeter 2, a high-speed pump 3, a high-speed motor 4, a frequency converter 5 and a microcomputer circuit board 6; the output shaft of the high-speed motor is fixedly connected to the high-speed pump through a coupling, and a mounting hole for screwing in an inserted flowmeter is provided at the outlet or inlet of the high-speed pump 3, and the temperature and pressure flowmeter 2 is screwed on the inner side of the mounting hole, and a controllable solenoid valve 1 is installed at the outlet or inlet of the high-speed pump 3, the controllable solenoid valve 1 and the temperature and pressure flowmeter 2 are preferably fixed at the outlet of the high-speed pump 3, and the controllable solenoid valve 1 and the temperature and pressure flowmeter 2 have communication capabilities, and the microcomputer circuit board 6 supports programming and communication.

[0042] In this embodiment, the high-speed pump 3 is a magnetic pump, which is driven by a magnetic coupling and supports a wide range of working performance; the fixed position of the high-speed pump 3 is 3-5D away from the maximum outer diameter of the impeller, where D is the inner wall diameter of the pump body volute outlet pipe.

[0043] In this embodiment, the temperature and pressure flowmeter 2 is powered by wired means, and the temperature and pressure flowmeter 2 communicates with the microcomputer circuit board 6 by protocol communication, 0-5V analog signal or LoRa wireless communication;

[0044] 1) Protocol communication includes Modbus protocol or Hart protocol, as follows:

[0045] In the communication mode using the Modbus protocol, the temperature and pressure flow meter 2 is connected to the microcomputer circuit board 6 via a serial port (such as RS485) and transmits data according to the Modbus protocol;

[0046] In the communication mode using the Hart protocol, the temperature and pressure flowmeter 2 transmits signals through a 4-20 mA current loop and adds a digital signal to transmit additional information, while the microcomputer circuit board 6 is equipped with a specific Hart communication module or converter;

[0047] The steps for connecting the temperature and pressure flow meter 2 and the microcomputer circuit board 6 are as follows:

[0048] Step 1, determine the communication protocol and interface standard: According to the specifications or technical documents of the temperature and pressure flow meter 2 and the microcomputer circuit board 6, determine the communication protocol and interface standard they support;

[0049] Step 2, connect the hardware: Use appropriate cables and connectors to connect the RS485 interface or other interfaces of the temperature and pressure flow meter 2, such as RS232, USB, Ethernet, etc., to the corresponding interface of the microcomputer circuit board 6, ensuring that the connection is firm and reliable to avoid looseness or poor contact leading to communication failure;

[0050] Step 3, configure communication parameters: configure communication parameters matching the temperature and pressure flow meter 2 on the microcomputer circuit board 6, such as baud rate, data bit, stop bit, check bit, etc. These parameters need to be negotiated and set consistently before the two parties communicate;

[0051] Step 4, write the communication program: according to the selected communication protocol and interface standard, write the communication program on the microcomputer circuit board 6. The program should be able to send and receive data frames that comply with the protocol, and correctly parse and process these data;

[0052] Step 5. Test communication: After the connection and configuration are completed, perform a communication test to verify the correctness and reliability of the connection. The test includes sending test data, checking whether the received data is correct, and simulating fault conditions for troubleshooting.

[0053] 2) 0-5V analog signals transmit information by converting changes in physical quantities into changes in voltage signals. In the temperature and pressure flowmeter 2, 0-5V analog signals are used to transmit measurement values ​​such as flow, temperature, and pressure. The microcomputer circuit board 6 receives these analog signals and performs analog-to-digital conversion (ADC) to obtain the measurement data of the flowmeter;

[0054] 3) LoRa wireless communication is suitable for occasions where wiring is difficult or remote monitoring is required. Through LoRa wireless communication, the temperature and pressure flow meter 2 can wirelessly transmit the measurement data to the microcomputer circuit board 6 to realize remote data collection and monitoring.

[0055] In this embodiment, the high-speed motor 4 is one of a permanent magnet synchronous motor or a three-phase asynchronous motor, and a permanent magnet synchronous motor is preferred, and a three-phase asynchronous motor is secondarily preferred. The high-speed motor 4 supports 20-100HZ speed regulation; the flange end face of the high-speed motor 4 is installed on the pump connecting frame, and the base of the high-speed motor 4 is installed on the fixed end face.

[0056] In this embodiment, the device is controlled in two steps, as follows:

[0057] S1. Demand entry:

[0058] The user applies to the system for instructions to be executed through interface operation or remote instructions. The required instructions include basic information such as output pressure, output flow, output accuracy, and conveying medium;

[0059] After receiving the instruction, the microcomputer circuit board 6 first matches the database pre-stored locally to match the closest execution parameters, which include information such as the inverter output frequency, controllable solenoid valve opening, output flow, speed, pressure, etc.

[0060] After matching the instruction, the control execution instruction is sent to the actuator (the frequency converter 5 and the controllable solenoid valve 1) and the execution is waited for completion;

[0061] S2. Calibration after execution:

[0062] The temperature and pressure sensor samples the real-time output status at high frequency and feeds back to the microcomputer circuit board 6;

[0063] The microcomputer circuit board 6 compares the required performance with the sampled data and calculates the difference, and fine-tunes the controllable solenoid valve opening or the inverter output frequency according to the flow and pressure difference to approach the target parameters;

[0064] The above calibration operation is performed repeatedly to ensure that the device is always operating at the target performance during operation and the output performance will not be affected by changes in the production environment.

[0065] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An ultra-wide range self-adjustable high-precision magnetic transmission device, comprising a high-speed motor (4), a frequency converter (5) and a microcomputer circuit board (6), characterized in that: The output shaft of the high-speed motor (4) is fixedly connected to the high-speed pump (3) via a coupling, and a mounting hole is provided at the outlet or inlet of the high-speed pump (3), and a temperature and pressure flow meter (2) is screwed on the inner side of the mounting hole. A controllable electromagnetic valve (1) is installed at the outlet or inlet of the high-speed pump (3), and the controllable electromagnetic valve (1) and the temperature and pressure flow meter (2) are preferably fixed at the outlet of the high-speed pump (3).

2. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 1, characterized in that: The fixed position of the high-speed pump (3) is 3-5D away from the maximum outer diameter of the impeller, where D is the inner wall diameter of the outlet pipe of the pump volute.

3. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 1, characterized in that: The temperature and pressure flowmeter (2) is powered by wired means, and the temperature and pressure flowmeter (2) communicates with the microcomputer circuit board (6) by means of protocol communication, analog signals or LoRa wireless communication, and the microcomputer circuit board (6) supports programming and communication; The protocol communication includes Modbus protocol or Hart protocol, as follows: In a communication mode using the Modbus protocol, the temperature and pressure flow meter (2) is connected to the microcomputer circuit board (6) via a serial port, and data is transmitted according to the Modbus protocol; In the communication mode using the Hart protocol, the temperature and pressure flow meter (2) transmits signals through a current loop and adds a digital signal to transmit additional information, while the microcomputer circuit board (6) is equipped with a specific Hart communication module or converter; The analog signal transmits information by converting the change of physical quantity into the change of voltage signal. In the temperature and pressure flow meter (2), the analog signal is used to transmit the measured value. The microcomputer circuit board (6) receives the analog signal and performs analog-to-digital conversion to obtain the measured data of the flow meter. In the LoRa wireless communication, the temperature and pressure flow meter (2) wirelessly transmits the measurement data to the microcomputer circuit board (6), thereby realizing remote data collection and monitoring.

4. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 1, characterized in that: The high-speed pump (3) is a magnetic pump driven by a magnetic coupling.

5. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 1, characterized in that: The high-speed motor (4) is one of a permanent magnet synchronous motor or a three-phase asynchronous motor, and preferably a permanent magnet synchronous motor, and secondarily a three-phase asynchronous motor. The high-speed motor (4) supports 20-100 Hz speed regulation.

6. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 5, characterized in that: The flange end face of the high-speed motor (4) is mounted on the pump connecting frame, and the foot of the high-speed motor (4) is mounted on the fixed end face.

7. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 1, characterized in that: The device is controlled in two steps, as follows: S1. Demand entry: The user applies to the system for instructions to be executed through interface operation or remote instructions; After receiving the instruction, the microcomputer circuit board (6) first matches the database pre-stored locally to match the closest execution parameter; After the command is matched, the control execution command is sent to the actuator, that is, the control execution command is sent to the frequency converter (5) and the controllable solenoid valve (1), and the execution is waited for completion; S2. Calibration after execution: The temperature and pressure sensor samples the real-time output status at high frequency and feeds back to the microcomputer circuit board (6); The microcomputer circuit board (6) compares the required performance with the sampled data and calculates the difference, and fine-tunes the opening of the controllable electromagnetic valve or the output frequency of the frequency converter according to the flow rate and pressure difference to approach the target parameter; The above calibration operation is performed repeatedly to ensure that the device is always operating at the target performance during operation and the output performance will not be affected by changes in the production environment.

8. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 7, characterized in that: In step S1, the demand instruction includes output pressure, output flow, output accuracy, and conveying medium.

9. The ultra-wide-range self-adjustable high-precision magnetic transport device according to claim 7, characterized in that: In the step S1, the execution parameters include the inverter output frequency, the opening of the controllable solenoid valve, the output flow, the rotation speed, and the pressure.

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