Scale inhibiting device utilizing frequency agile electric field
By adopting a split structure and strong/weak current isolation design, the scale inhibition device of the variable frequency electric field solves the problem of poor performance of traditional electric field scale inhibition devices in complex environments, and achieves efficient and stable scale inhibition effect in industrial fluid systems of multiple industries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-16
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional electric field scale inhibition devices have limitations in invasive installation, resulting in poor scale inhibition effects and difficulty in maintaining long-term stable and efficient scale inhibition performance in complex industrial environments.
The scale inhibition device adopts a variable frequency electric field. It uses a separate structure of electric field source and coupling transducer component, which is connected by shielded cable. The coupling transducer component is nested on the outer wall of the pipe to generate an alternating electromagnetic field to interfere with the crystallization process of scale ions. The electric field source adopts a strong and weak current isolation design, which is suitable for industrial fluid systems in multiple industries.
It can operate reliably for a long time in complex industrial environments, adapt to various working conditions, improve scale inhibition, reduce energy loss, ensure stable transmission of electrical signals, adapt to different pipe diameters, and cover multiple industrial scenarios.
Smart Images
Figure CN224118835U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipeline scale inhibition technology, specifically relating to a scale inhibition device that utilizes a variable frequency electric field. Background Technology
[0002] Scaling is a prevalent phenomenon in many industrial production sectors, including energy, chemical, petroleum, and power, and poses a significant safety challenge in industrial operation and production. When hard water flows through operating equipment, it causes changes in pressure and solubility. Mineral ions react chemically with bicarbonate ions in the water, ultimately forming mineral deposits on the equipment surface—a process known as scaling. As scale continuously accumulates, it increases the thermal resistance of heat exchange equipment and reduces its heat exchange efficiency. Furthermore, scaling reduces the water flow area within the equipment, leading to decreased production output, energy waste, and even system malfunctions, potentially causing safety accidents.
[0003] Electric field scale inhibition technology has been widely studied due to its advantages of being clean, efficient, and convenient. Electric field scale inhibition includes various forms of electric fields, such as constant magnetic fields, electrostatic fields, electromagnetic fields, pulsed electromagnetic fields, high-frequency electric fields, alternating electric fields, and pulsed electric fields, each with varying degrees of scale inhibition effect. However, most current electric field scale inhibition devices are invasive, which significantly limits subsequent application research. Considering the complex processes of actual heat exchange, many factors affect scale inhibition performance, severely hindering the application of electric field scale inhibition technology in production practice. When fluid composition, flow rate, temperature, and other operating conditions fluctuate, the scale inhibition effect of such devices decreases significantly, making it difficult to maintain long-term stable and efficient scale inhibition performance in real, complex industrial environments. Utility Model Content
[0004] Therefore, this utility model provides a scale inhibition device that utilizes a variable frequency electric field, solving the problems of limited installation and poor scale inhibition effect of traditional electric field scale inhibition methods.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a scale inhibition device utilizing a frequency-sensitive electric field, comprising an electric field source, a shielded cable, and a coupling transducer assembly;
[0006] The electric field source is used to generate high-frequency, high-voltage electrical signals;
[0007] One end of the shielded cable is electrically connected to the electric field source, and the other end of the shielded cable is electrically connected to the coupling transducer assembly;
[0008] The coupling transducer is nested in the outer wall of the pipe. The coupling transducer converts the electrical signal output by the electric field source into an alternating electromagnetic field that penetrates the pipe wall. The alternating electromagnetic field induces a frequency-agile electric field in the fluid inside the pipe to interfere with the crystallization process of scale ions.
[0009] As a preferred embodiment of the scale inhibition device utilizing a frequency-adjustable electric field, the outer shell of the electric field source is made of aluminum alloy, and the interior of the electric field source is divided into a strong electric cavity and a weak electric cavity by a partition.
[0010] The high-voltage cavity has a built-in power conversion module and a battery management unit, and the high-voltage cavity is connected to an industrial AC power supply.
[0011] The low-voltage cavity is equipped with a central processing unit, which uses a microcontroller based on the ARM Cortex-M4 core.
[0012] As a preferred embodiment of a scale inhibition device utilizing a frequency-sensitive electric field, the electric field source further includes:
[0013] A signal synthesis driving module is used to receive instructions from the microcontroller to generate an amplitude-adjustable baseband signal.
[0014] The power amplifier output module uses a push-pull MOSFET drive circuit and a full-bridge resonant power amplifier to amplify the baseband signal into a high-frequency, high-voltage AC signal and output it to the coupling transducer component.
[0015] As a preferred embodiment of a scale inhibition device utilizing a frequency-sensitive electric field, the coupling transducer component includes:
[0016] The magnetic circuit body consists of several modularly packaged segments. Each segment of the magnetic circuit body contains a manganese-zinc soft magnetic ferrite core, and an excitation coil is wound around the outer periphery of the manganese-zinc soft magnetic ferrite core. The outermost layer of each segment of the magnetic circuit body is a polyurethane protective sleeve.
[0017] The two ends of the excitation coil are connected to the shielded cable via aviation plugs.
[0018] As a preferred solution for a scale inhibition device utilizing a variable frequency electric field, several sections of the magnetic circuit body are spliced together by splicing parts to form a ring structure that fits the outer wall of the pipe.
[0019] When the nominal diameter of the pipe DN≤50mm, the main body of the magnetic circuit is a pre-formed 180° semi-annular ferrite block; when the nominal diameter DN>50mm, the main body of the magnetic circuit is fixed to the outer wall of the pipe by a stainless steel clamp.
[0020] As a preferred solution for a scale inhibition device utilizing a frequency-agile electric field, the power amplifier output module has built-in overcurrent, overvoltage, overheat, and short-circuit protection circuits; the electric field source also integrates an ADC channel and an isolated communication interface.
[0021] As a preferred embodiment of the scale inhibition device utilizing the variable frequency electric field, the coupling transducer is installed on the straight section of the pipeline, and the coupling transducer is located after the pump and before the valve in the pipeline, with a distance of not less than 1 meter from the disturbance source.
[0022] The electric field source is wall-mounted or cabinet-mounted and installed in a control box or safe area.
[0023] This utility model has the following advantages:
[0024] First, it adopts a separate structure for the electric field source and the coupling transducer, and is connected with a shielded cable. There is no need to cut off the pipe or insert internal electrodes, so it does not interfere with the production process. The electric field source is divided into strong and weak current isolation chambers by partitions to avoid electromagnetic interference affecting control accuracy. It can operate reliably for a long time in harsh industrial environments such as high temperature and high humidity.
[0025] Second, the main body of the coupling transducer magnetic circuit is made of high-permeability manganese-zinc soft magnetic ferrite material. The magnetic circuit structure fits the outer wall of the pipe to form a closed loop, reducing energy loss. The outer polyurethane protective sleeve has anti-corrosion and aging-resistant properties, ensuring that the electric field energy can efficiently penetrate the pipe wall and act on the fluid.
[0026] Third, it can be adapted to industrial fluid systems in multiple industries such as energy, chemical, petroleum, and power, and is compatible with pipes of different nominal diameters. It can meet the scale inhibition needs of various industrial scenarios and has comprehensive application coverage. Attached Figure Description
[0027] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0028] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0029] Figure 1 This is a schematic diagram of the scale inhibition device utilizing a frequency-sensitive electric field provided in an embodiment of the present invention.
[0030] Figure 2This is a schematic diagram of the coupling transducer and pipeline combination of the scale inhibition device utilizing a fast frequency conversion electric field provided in an embodiment of the present utility model.
[0031] Figure 3 An exploded view of the coupled transducer of a scale inhibition device utilizing a frequency-sensitive electric field, provided in one possible embodiment.
[0032] Figure 4 This is a circuit diagram of a scale inhibitor device utilizing a frequency-sensitive electric field provided in an embodiment of the present invention.
[0033] In the diagram, 1 is the electric field source; 2 is the shielded cable; 3 is the coupling transducer assembly; 4 is the conduit; 11 is the signal synthesis and driving module; 12 is the power amplification output module; 13 is the microcontroller; 31 is the magnetic circuit body; 32 is the splicing component; and 33 is the aviation connector. Detailed Implementation
[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0035] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a scale inhibition device utilizing a frequency-agile electric field, including an electric field source 1, a shielded cable 2, and a coupling transducer 3; the electric field source 1 is used to generate a high-frequency high-voltage electrical signal; one end of the shielded cable 2 is electrically connected to the electric field source 1, and the other end of the shielded cable 2 is electrically connected to the coupling transducer 3; the coupling transducer 3 is nested in the outer wall of the pipe 4, and the coupling transducer 3 converts the electrical signal output by the electric field source 1 into an alternating electromagnetic field that penetrates the pipe wall, and the alternating electromagnetic field induces a frequency-agile electric field in the fluid inside the pipe 4 to interfere with the crystallization process of scale ions.
[0036] Among them, the electric field source 1 serves as the core control and energy output end, providing the power basis for scale inhibition; the shielded cable 2 undertakes the task of lossless transmission of signals and energy; and the coupling transducer 3 serves as the execution end, realizing the energy conversion from electromagnetism to electro-electricity. The electric field source 1 has a built-in signal synthesis and power amplification module, which is controlled by the microcontroller 13 to convert the low-voltage control signal into a high-frequency, high-voltage electrical signal. Its frequency and amplitude can be flexibly adjusted, providing a highly adaptable energy source for the inductively variable frequency electric field and meeting the scale inhibition requirements under different working conditions. The shielded structure design can effectively isolate electromagnetic interference in the industrial environment, avoid distortion and loss of electrical signals during transmission, and ensure that the high-frequency, high-voltage electrical signal output by the electric field source 1 can be accurately and stably transmitted to the coupling transducer 3, ensuring energy transmission efficiency and signal integrity. The coupling transducer 3 is nested in the outer wall of the pipe 4 without damaging the structure of the pipe 4. It converts the electrical signal into an alternating electromagnetic field through the principle of electromagnetic induction. This magnetic field has strong penetrability and can penetrate the pipe wall to act on the fluid inside the pipe. According to the law of electromagnetic induction, fluids, as conductors, will induce a frequency-sensitive electric field in an alternating magnetic field. This electric field can change the charge distribution and trajectory of scale-forming ions, disrupt the nucleation and growth process of ion crystals, thereby inhibiting the deposition of dirt on the inner wall of pipe 4.
[0037] In one possible embodiment, the outer shell of the electric field source 1 is made of aluminum alloy, and the interior of the electric field source 1 is divided into a high-voltage cavity and a low-voltage cavity by a partition; the high-voltage cavity has a built-in power conversion module and a battery management unit, and the high-voltage cavity is connected to an industrial AC power supply; the low-voltage cavity is equipped with a central processing unit, and the central processing unit adopts a microcontroller 13 based on the ARM Cortex-M4 core.
[0038] Specifically, the aluminum alloy material combines high strength, lightweight, and good thermal conductivity, providing reliable protection for internal components against collisions and vibrations in industrial environments. It also quickly dissipates heat generated by internal circuitry, preventing high temperatures from affecting equipment stability. Furthermore, aluminum alloy exhibits excellent corrosion resistance, making it suitable for use in complex industrial environments. A partition separates the electric field source 1 into a high-voltage cavity and a low-voltage cavity. The high-voltage cavity handles high-voltage, high-current signals, while the low-voltage cavity handles low-voltage, high-precision control signals. This isolation design prevents electromagnetic interference from the high-voltage circuit from entering the low-voltage circuit, avoiding interference with the microcontroller 13's operational accuracy. It also reduces the impact of high-voltage circuit faults on low-voltage components, improving the overall safety and stability of the device.
[0039] The power conversion module inside the high-voltage cavity filters, rectifies, and regulates the incoming industrial AC power, converting it into multiple stable DC voltages required by the system, providing an adaptive power supply for the device. The battery management unit can be connected to an external backup battery, enabling seamless power switching when the main power is interrupted, ensuring uninterrupted control and continuous scale inhibition.
[0040] Among them, the microcontroller 13 based on the ARM Cortex-M4 core features high performance, low power consumption, and high integration. It has a main frequency of no less than 168MHz and sufficient storage resources, enabling it to quickly run control algorithms, process sensor signals in real time, and generate control commands.
[0041] See Figures 1-4 In one possible embodiment, the electric field source 1 further includes: a signal synthesis driving module 11, which is used to receive instructions from the microcontroller 13 to generate an amplitude-adjustable baseband signal; and a power amplification output module 12, which uses a push-pull MOSFET driving circuit and a full-bridge resonant power amplifier to amplify the baseband signal into a high-frequency high-voltage AC signal and output it to the coupling transducer 3.
[0042] Specifically, the signal synthesis and driving module 11 is based on direct digital frequency synthesis (DDS) technology. It receives frequency and amplitude commands from the microcontroller 13 and generates a high-precision, high-stability baseband signal through digital signal processing. The signal synthesis and driving module 11 can perform high-speed pseudo-random variations in the range of 10kHz to 500kHz, responds to the control commands of the microcontroller 13, and provides a highly adaptable raw signal for power amplification.
[0043] The MOSFET devices in the power amplifier output module 12 feature fast switching speed and low on-resistance. Their push-pull structure enhances drive capability, amplifying the baseband signal's drive current and providing sufficient input drive power for the full-bridge resonant power amplifier, ensuring efficient operation of the power amplifier output module 12. The full-bridge resonant power amplifier utilizes resonant technology to significantly improve energy conversion efficiency and reduce power loss, amplifying the baseband signal into a high-frequency, high-voltage AC signal with a peak voltage of up to 1000Vp-p and a maximum continuous output power of no less than 500W. The full-bridge structure provides greater output power and a more stable signal waveform, meeting the high-energy electrical signal requirements of the coupling transducer component 3 and ensuring the strength and stability of the subsequent electromagnetic field.
[0044] In one possible embodiment, the coupling transducer assembly 3 includes: several modularly packaged magnetic circuit bodies 31, each of which contains a manganese-zinc soft ferrite core, and an excitation coil is wound around the outer periphery of the manganese-zinc soft ferrite core; the outermost layer of each magnetic circuit body 31 is a polyurethane protective sleeve. The two ends of the excitation coil are connected to the shielded cable 2 via aviation connectors 33.
[0045] Specifically, the manganese-zinc soft magnetic ferrite material possesses high initial permeability and low high-frequency loss, enabling efficient conduction of alternating magnetic fields, reducing magnetic field energy loss, and ensuring efficient conversion of electrical signals into magnetic fields. The arc-shaped magnetic strip structure can closely conform to the outer wall of pipe 4, forming a closed magnetic circuit, concentrating the magnetic field on the area of pipe 4, enhancing the magnetic field's ability to penetrate the pipe wall, and improving energy coupling efficiency. The polyurethane material has excellent corrosion resistance, aging resistance, and insulation properties. Covering the outside of the magnetic circuit body 31, it can effectively isolate the magnetic circuit body 31 from harsh environmental factors such as humidity and corrosive gases in the industrial environment, protecting the magnetic circuit body 31 and excitation coil from damage. At the same time, it avoids electromagnetic interference or short-circuit risks caused by direct contact between the magnetic circuit body 31 and pipe 4, extending the service life of the components. The excitation coil is wound with multi-turn Litz wire. Litz wire can reduce the skin effect of high-frequency current, reduce coil loss, and improve the conversion efficiency of electrical energy to magnetic energy. The shielded cable 2 is connected through aviation plug 33. Aviation plug 33 has the characteristics of being waterproof, dustproof, and reliable in connection. It can ensure the stable electrical connection between the coil and the cable, avoid signal transmission interruption or loss, and ensure the continuity of energy transmission.
[0046] In one possible embodiment, several sections of the magnetic circuit body 31 are spliced together by splicing parts 32 to form an annular structure that fits the outer wall of the pipe 4; when the nominal diameter of the pipe 4 DN≤50mm, the magnetic circuit body 31 is a pre-formed 180° semi-annular ferrite block; when the nominal diameter DN>50mm, the magnetic circuit body 31 is fixed to the outer wall of the pipe 4 by stainless steel clamps.
[0047] Specifically, several segments of the magnetic circuit body 31 are spliced together by splicing parts 32 to form a ring structure, which can form a closed magnetic circuit. This allows the magnetic field to be conducted along the ring path, avoiding magnetic field leakage and ensuring that the magnetic field energy is concentrated on the fluid inside the pipe 4, thereby improving the magnetic field utilization efficiency and scale inhibition effect. The ring structure adapts to the circular contour of the pipe 4, ensuring that the magnetic field is evenly distributed around the pipe 4 and avoiding scale inhibition dead zones. When the nominal diameter of the pipe 4 DN≤50mm, a pre-formed 180° semi-ring ferrite block is used. Its curvature is precisely matched with the outer wall of the small-diameter pipe 4. After splicing, it can fit tightly against the pipe 4, forming a complete closed magnetic circuit without complicated adjustments. It is easy to install and highly adaptable, ensuring the uniformity and strength of the magnetic field around the small-diameter pipe 4. When the nominal diameter DN of pipe 4 is greater than 50mm, the arc-shaped magnetic strip is fixed by a stainless steel clamp. The stainless steel clamp has high strength and corrosion resistance, which can tightly lock the magnetic strip to the outer wall of pipe 4, ensuring that there is no gap between the magnetic strip and pipe 4 and avoiding magnetic field leakage. At the same time, the clamp-type fixing method is flexible in installation, and the fixing position and tightness can be adjusted according to the actual size of the large-diameter pipe 4 to ensure the integrity and stability of the annular magnetic circuit.
[0048] In one possible embodiment, the power amplifier output module 12 has built-in overcurrent, overvoltage, overheat and short-circuit protection circuits; the electric field source 1 also integrates an ADC channel and an isolated communication interface.
[0049] Specifically, the overcurrent protection circuit detects the output current and quickly cuts off the circuit when the current exceeds a preset threshold to prevent components from burning out due to overcurrent; the overvoltage protection circuit monitors the output voltage to prevent abnormal voltage rises from damaging power devices; the overheat protection circuit monitors the module temperature in real time through a temperature sensor and triggers heat dissipation or power-off protection when the temperature is too high to prevent component aging and damage; and the short-circuit protection circuit immediately cuts off the power supply in the event of a short-circuit fault to prevent the fault from escalating. These multiple protection mechanisms comprehensively ensure the safe operation of the power amplifier output module 12 and the entire electric field source 1, improving the reliability of the device in complex industrial environments.
[0050] The ADC (Analog-to-Digital Converter) channel converts analog signals from sensors such as flow rate, temperature, and conductivity into digital signals, which are then transmitted to the microcontroller 13 for processing. Integrating multiple high-precision ADC channels enables simultaneous acquisition of signals from various operating conditions, providing real-time and accurate operating data support to the microcontroller 13. This ensures the control algorithm can dynamically adjust electric field parameters according to changes in operating conditions, enhancing the device's adaptive capabilities. The communication interface employs an isolated design, effectively isolating electromagnetic interference and common-mode noise on the communication line, preventing interference with the normal operation of the internal circuitry of the electric field source 1. Simultaneously, the isolation design prevents external device faults from being transmitted to the electric field source 1 through the communication interface, improving the device's operational safety. The communication interface enables bidirectional data interaction between the electric field source 1 and a host computer or IoT gateway, supporting remote start / stop, parameter setting, and status monitoring functions, enhancing the device's intelligence and ease of maintenance.
[0051] In one possible embodiment, the coupling transducer 3 is installed on the straight section of the pipeline 4, and the coupling transducer 3 is located after the pump and before the valve in the pipeline 4, with a distance of not less than 1 meter from the disturbance source; the electric field source 1 is wall-mounted or cabinet-mounted in the control box or in a safe area.
[0052] Specifically, installing the coupling transducer 3 on the straight section of pipe 4 avoids disturbances to fluid flow caused by irregular structures such as bends and tees in pipe 4, ensuring stable fluid velocity and uniform flow field within the pipe. This allows the variable frequency electric field to act uniformly on the fluid, avoiding uneven scale inhibition effects caused by flow field turbulence. Located after the pump, it utilizes the pump's pressurization effect to keep the fluid in a stable flow state, facilitating the electric field's effectiveness. Located before the valve, it avoids water flow impact disturbances caused by valve opening and closing, reducing the impact of pulse interference on electromagnetic field stability. With a distance of not less than 1 meter from disturbance sources, it further reduces the impact of external disturbances, such as pump vibration and valve operation impacts, on the coupling transducer 3, ensuring the stability of magnetic field coupling and consistency of scale inhibition effect.
[0053] Among them, the wall-mounted or cabinet-mounted electric field source 1 can make full use of industrial site space, adapt to different installation environments, and reduce the requirements for site layout; when installed in the control box or safe area, it can avoid the electric field source 1 being directly exposed to harsh environments such as high temperature, high humidity, and corrosive gases, protecting the internal circuit components from damage, while complying with industrial safety specifications, reducing safety risks such as electric shock to personnel and equipment misoperation, and improving the operational safety and service life of the device.
[0054] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A scale inhibition device utilizing a frequency-sensitive electric field, characterized in that, It includes an electric field source (1), a shielded cable (2), and a coupling transducer assembly (3); The electric field source (1) is used to generate high-frequency high-voltage electrical signals; One end of the shielded cable (2) is electrically connected to the electric field source (1), and the other end of the shielded cable (2) is electrically connected to the coupling transducer assembly (3); The coupling transducer (3) is nested on the outer wall of the pipe (4). The coupling transducer (3) converts the electrical signal output by the electric field source (1) into an alternating electromagnetic field that penetrates the pipe wall. The alternating electromagnetic field induces a frequency-sensitive electric field in the fluid inside the pipe (4) to interfere with the crystallization process of scale ions.
2. The scale inhibition device utilizing a frequency-agile electric field according to claim 1, characterized in that, The outer shell of the electric field source (1) is made of aluminum alloy, and the interior of the electric field source (1) is divided into a strong electric cavity and a weak electric cavity by a partition. The high-voltage cavity has a built-in power conversion module and a battery management unit, and the high-voltage cavity is connected to an industrial AC power supply. The weak current cavity is equipped with a central processing unit, which is a microcontroller (13) based on the ARM Cortex-M4 core.
3. The scale inhibition device utilizing a frequency-agile electric field according to claim 2, characterized in that, The electric field source (1) also includes: Signal synthesis driving module (11), the signal synthesis driving module (11) is used to receive instructions from the microcontroller (13) to generate an amplitude-adjustable baseband signal; The power amplifier output module (12) adopts a push-pull MOSFET driving circuit and a full-bridge resonant power amplifier to amplify the baseband signal into a high-frequency high-voltage AC signal and output it to the coupling transducer component (3).
4. The scale inhibition device utilizing a frequency-agile electric field according to claim 1, characterized in that, The coupling transducer component (3) includes: The magnetic circuit body (31) is modularly packaged in several segments. Each segment of the magnetic circuit body (31) is provided with a manganese-zinc soft magnetic ferrite core. An excitation coil is wound around the outer periphery of the manganese-zinc soft magnetic ferrite core. The outermost layer of each segment of the magnetic circuit body (31) is a polyurethane protective sleeve. The two ends of the excitation coil are connected to the shielded cable (2) via an aviation plug (33).
5. The scale inhibition device utilizing a frequency-agile electric field according to claim 4, characterized in that, Several sections of the magnetic circuit body (31) are spliced together by splicing parts (32) to form a ring structure that fits the outer wall of the pipe (4); When the nominal diameter of the pipe (4) is DN≤50mm, the magnetic circuit body (31) is a pre-formed 180° semi-annular ferrite block; when the nominal diameter is DN>50mm, the magnetic circuit body (31) is fixed to the outer wall of the pipe (4) by a stainless steel clamp.
6. The scale inhibition device utilizing a frequency-agile electric field according to claim 3, characterized in that, The power amplifier output module (12) has built-in overcurrent, overvoltage, overheat and short circuit protection circuits; the electric field source (1) also integrates an ADC channel and an isolated communication interface.
7. The scale inhibition device utilizing a frequency-agile electric field according to claim 1, characterized in that, The coupling transducer assembly (3) is installed on the straight section of the pipeline (4). The coupling transducer assembly (3) is located after the pump and before the valve in the pipeline (4) and the distance between it and the disturbance source is not less than 1 meter. The electric field source (1) is wall-mounted or cabinet-mounted in the control box or in a safe area.