Pressure balance high-pressure flow automatic control instrument

Abstract

The invention provides a pressure balance high-pressure flow automatic control instrument, and relates to the technical field of high-pressure flow automatic control instruments. The flow adjusting unit is provided with an adjusting mechanism used for adjusting flow. The adjusting mechanism comprises a main shaft which is rotatably arranged in the adjusting cavity in the first direction; the first adjusting block is movably connected to the main shaft in the radial direction of the main shaft, and a limiting mechanism used for enabling the main shaft and the first adjusting block to be relatively fixed is further arranged between the first adjusting block and the main shaft. The control unit is in communication connection with the flow measuring unit and the flow adjusting unit, and the control unit can adjust the flow in the measuring pipeline through the flow adjusting unit based on a preset flow threshold value and the real-time flow, obtained through the flow measuring unit, in the measuring pipeline. The method has an effective compensation mechanism, and the flow self-adaptive control precision is improved so as to adapt to complex and changeable working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field related to high-pressure flow automatic controllers, and in particular to a pressure-balanced high-pressure flow automatic controller. Background Art

[0002] In industrial production, high-pressure flow controllers are widely used in fields such as petrochemicals, energy and electricity, and metallurgy to precisely control the flow of high-pressure fluids. Currently, most pressure-balanced high-pressure flow controllers on the market use traditional pressure-balancing structures, such as a balancing diaphragm or piston installed in the regulating valve. This structure can offset the thrust of the fluid pressure on the valve core to a certain extent.

[0003] Currently, because high-pressure fluids are prone to pressure fluctuations and uneven flow rates during transportation, traditional balancing structures struggle to quickly and effectively respond to these dynamic changes. This leads to a mismatch between the actual valve opening and the control signal, resulting in significant deviations in flow control and an inability to meet the demands of high-precision flow control. Furthermore, the effective compensation mechanisms of most current pressure-balanced, high-pressure flow automatic controllers result in poor flow control effectiveness, making them difficult to adapt to complex and changing operating conditions. Summary of the Invention

[0004] In view of the above shortcomings of the prior art, an object of the present invention is to provide a pressure-balanced high-pressure flow automatic controller, which can solve the above problems existing in the prior art.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a pressure-balanced high-pressure flow automatic controller, comprising:

[0006] A flow measurement unit is connected to the measuring pipeline;

[0007] The flow regulating unit is provided at the rear end of the flow measuring unit and is provided with a regulating cavity connected to the measuring pipeline, and a regulating mechanism for flow regulation is provided in the regulating cavity, the regulating mechanism comprising:

[0008] a main shaft rotatably disposed in the adjustment cavity along a first direction, and the main shaft is connected to a power source for driving the main shaft to rotate; and

[0009] a first adjusting block movably connected to the main shaft along a radial direction of the main shaft, and a limiting mechanism for relatively fixing the main shaft and the first adjusting block is provided between the first adjusting block and the main shaft;

[0010] Wherein, the adjustment cavity comprises a first limiting surface and a second limiting surface, and the outer side surface of the first adjustment block is connected to the first limiting surface and / or the second limiting surface;

[0011] A control unit is communicatively connected to the flow measurement unit and the flow regulation unit. The control unit can regulate the flow in the measurement pipeline through the flow regulation unit based on a preset flow threshold and the real-time flow in the measurement pipeline obtained by the flow measurement unit.

[0012] In one embodiment, the flow measurement unit includes a first connecting housing, in which a first fluid channel is defined;

[0013] A flow meter for measuring the flow of the fluid in the first fluid channel is connected in the path of the first fluid channel, and the flow meter is electrically connected to the control unit.

[0014] In one embodiment, the flow measuring instrument is an electromagnetic flow meter.

[0015] In one embodiment, the flow regulating unit includes a second connecting shell, and a second fluid channel is defined in the second connecting shell;

[0016] Wherein, the regulating cavity is arranged in the second fluid channel, and the first limiting surface and the second limiting surface are symmetrically arranged.

[0017] In one embodiment, a first connection point is formed on the first limiting surface, and a second connection point is formed on the second limiting surface;

[0018] Wherein, when the first adjusting block is located at the first locking position, the outer side surface of the first adjusting block is connected to the first connection point and the second connection point.

[0019] In one embodiment, the flow regulating unit further includes an adaptive fine-tuning mechanism, including:

[0020] a sliding rod, slidably connected to the second connecting housing, and a regulating piston fixedly connected to the end of the sliding rod;

[0021] The second connecting shell is provided with a first chamber and a second chamber;

[0022] The slide rod is fixedly connected to a protrusion in the first cavity, and a thrust spring is provided between the protrusion and the ground of the first cavity, and

[0023] A balancing channel is provided on the side wall of the second connecting shell. One end of the balancing channel is connected to the second chamber, and the other end of the balancing channel is connected to the pipeline upstream of the first regulating block.

[0024] In one embodiment, a plurality of sealing rings are sleeved on the outer diameter of the regulating piston.

[0025] In one embodiment, the system further comprises a third connecting housing in which an eccentric wheel is rotatably connected, and the eccentric wheel is connected to a drive motor for driving the eccentric wheel to rotate, and the drive motor is controlled and connected to the control unit;

[0026] Wherein, the outer diameter of the eccentric wheel is connected to the end of the sliding rod.

[0027] In one embodiment, a first sliding groove is provided on the first adjusting block, and a first limiting block is fixedly connected to the main shaft. The first adjusting block is connected to the first limiting block via the first sliding groove so as to be slidably connected to the main shaft.

[0028] In one embodiment, the first limiting surface and the second limiting surface are arc-shaped surfaces respectively, and the arc centers of the two limiting surfaces coincide with each other; and the rotation center of the main shaft coincides with the arc centers of the two limiting surfaces.

[0029] The beneficial effects of this application are:

[0030] 1. The control unit electrically connects the flow measurement unit and the regulating unit, forming a closed-loop "measurement-calculation-execution" system. Using a PID algorithm, the control unit dynamically adjusts the regulating unit's eccentric angle, hydraulic locking status, and adaptive slide bar displacement to ensure flow regulation accuracy, meeting the requirements for high-precision and stable control under high-pressure conditions.

[0031] 2. The adjustment unit uses an eccentrically rotating cylindrical first adjustment block, which achieves continuous linear adjustment of the flow range from 0-100% through the rotation of the main shaft, avoiding the step-like fluctuations of traditional valves. Combined with the mechanical feedback of the adaptive fine-tuning mechanism, it can automatically compensate for flow fluctuations.

[0032] 3. Through the locking / unlocking of the hydraulic limit mechanism, the adjustment unit can switch freely between precise adjustment and emergency shut-off modes, forming passive safety protection without relying on electronic control, and the safety level is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are provided for a better understanding of the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, among which:

[0034] Figure 1 This is a schematic diagram of the overall structure of a pressure-balanced high-pressure flow automatic controller of the present invention;

[0035] Figure 2 It is a schematic cross-sectional structural diagram of a pressure-balanced high-pressure flow automatic controller of the present invention;

[0036] Figure 3 This is a structural schematic diagram of a flow regulating unit of a pressure-balanced high-pressure flow automatic controller of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a flow regulating unit and a first locking position of a pressure-balanced high-pressure flow automatic controller of the present invention;

[0038] Figure 5 This is a structural schematic diagram of the first regulating block of a pressure-balanced high-pressure flow automatic controller of the present invention.

[0039] In the picture:

[0040] 100, flow measurement unit; 110, first connecting housing; 111, first fluid channel; 112, flow meter; 113, electrode; 200, flow regulation unit; 210, regulating chamber; 211, first limiting surface; 2110, first connection point; 212, second limiting surface; 2120, second connection point; 220, second connecting housing; 221, second fluid channel; 230, regulating mechanism; 231, main shaft; 232, first regulating block; 233, second regulating block; 234, second regulating block; 235, second regulating block; 236, second regulating block; 237, second regulating block; 238, second regulating block; 239, second regulating block; 240, second regulating unit; 241, first regulating unit; 242, second regulating unit; 243, second regulating unit; 244, second regulating unit; 245, second regulating unit; 246, second regulating unit; 247, second regulating unit; 248, second regulating unit; 249, second regulating unit; 250, second regulating unit; 251, first regulating unit; 252, first regulating unit; 253, second regulating unit; 254, second regulating unit; 255, second regulating unit; 256, second regulating unit; 257, second regulating unit; 258, second regulating unit; 259, second regulating unit; 260, second regulating unit; 261, second regulating unit; 262, second regulating unit; 263, second regulating unit; 264, second regulating unit; 265, second regulating unit; 266, second regulating unit; 267, second regulating unit; 268, second regulating unit; 269, second regulating unit; 270, first regulating unit; 271, first regulating unit; 272, first regulating unit; 273, second regulating unit; 2 20. First slide groove; 2321. First limit block; 240. Limiting mechanism; 241. Drive rod; 242. Limiting chamber; 250. Adaptive fine-tuning mechanism; 251. Slide rod; 252. Adjusting piston; 2520. Sealing ring; 253. First chamber; 254. Second chamber; 255. Protrusion; 256. Thrust spring; 257. Balance channel; 260. Third connecting shell; 261. Eccentric wheel; 262. Drive motor; 300. Control unit. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] See also Figures 1 to 5It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention.

[0044] See also Figures 1 to 5 The present invention provides a pressure-balanced high-pressure flow automatic controller, which includes a flow measuring unit 100, a flow regulating unit 200 and a control unit 300, and the control unit 300 is electrically connected to the flow measuring unit 100 and the flow regulating unit 200. The flow measuring unit 100 is connected to the measuring pipeline to obtain the flow data of the measuring pipeline. After the control unit 300 obtains the flow data, it can adjust the flow in the measuring pipeline in real time based on the flow data and through the flow regulating unit 200 to ensure that the flow of the measuring pipeline remains stable. At the same time, the control unit 300 constructs a closed-loop feedback system through electrical connection, collects flow data in real time and drives the regulating unit to dynamically adjust, ensuring that the flow is stable and meeting the high-pressure working condition control requirements.

[0045] Specifically, the flow measurement unit 100 includes a first connection housing 110, which is detachably connected to the measuring pipeline. A first fluid channel 111 is provided in the first connection housing 110, and the first fluid channel 111 is connected to the measuring pipeline, so that the fluid in the measuring pipeline can flow into the first fluid channel 111. A flow meter 112 for measuring the flow rate of the fluid in the first fluid channel 111 is connected in the path of the first fluid channel 111, and the flow meter 112 is electrically connected to the control unit 300. In one embodiment, the flow meter 112 uses an electromagnetic flow meter. It is understandable that the electromagnetic flow meter is used as the flow meter 112. Its symmetrically distributed electrodes 113 can perform non-contact measurement of the flow rate of the conductive fluid based on the principle of electromagnetic induction, with the advantages of high measurement accuracy, fast response speed, and wide measuring range. At the same time, the structure of the electrode 113 is not easily affected by fluid impurities or high-pressure environments, and can maintain stable measurement performance under complex working conditions, reducing measurement errors.

[0046] Specifically, the flow meter 112 is provided with electrodes 113 for measuring flow data, which are symmetrically distributed on both sides of the first fluid channel 111. When a conductive fluid passes through the first fluid channel 111, the fluid flow rate can be obtained in real time through the two electrodes 113. The first fluid channel 111 in the first connecting housing 110 is directly connected to the measuring pipeline, allowing the fluid to flow into the channel unimpeded, ensuring that the flow state of the fluid during the flow measurement process is consistent with the actual state of the pipeline, avoiding sudden flow changes or pressure losses caused by the structural design, ensuring the authenticity and reliability of the measurement data, and reducing the impact on the normal operation of the pipeline system.

[0047] In one embodiment, the flow regulating unit 200 is disposed at the rear end of the flow measuring unit 100 and defines a regulating chamber 210 connected to the measuring pipeline, and a regulating mechanism 230 for flow regulation is disposed within the regulating chamber 210. The flow regulating unit 200 includes a second connecting housing 220 defining a second fluid passage 221, and the regulating chamber 210 is disposed within the second fluid passage 221.

[0048] It can be understood that after the fluid enters the regulating chamber 210 through the first fluid channel 111 and the second fluid channel 221 , the regulating mechanism 230 can adjust the flow rate of the fluid by adjusting the size of the cross-section through which the fluid flows in the regulating chamber 210 .

[0049] Specifically, the adjustment mechanism 230 includes a main shaft 231 and a first adjustment block 232. The main shaft 231 is rotatably disposed within the adjustment chamber 210 along a first direction, and a power source is connected to the main shaft 231 to drive its rotation. The power source is electrically connected to the control unit 300, which controls the operating state of the power source to adjust the rotation angle of the main shaft 231 in the first direction.

[0050] The first adjustment block 232 is movably connected to the main shaft 231 along a radial direction of the main shaft 231. A limiting mechanism 240 is provided between the first adjustment block 232 and the main shaft 231 for relatively fixing the main shaft 231 and the first adjustment block 232. The limiting mechanism 240 enables relative fixation between the first adjustment block 232 and the main shaft 231.

[0051] Furthermore, the adjustment chamber 210 includes a first limiting surface 211 and a second limiting surface 212. The outer side surface of the first adjustment block 232 is connected to the first limiting surface 211 and / or the second limiting surface 212. It should be noted that the first limiting surface 211 and the second limiting surface 212 are arc-shaped and represent different arc segments of a concentric circle. Furthermore, the first limiting surface 211 and the second limiting surface 212 each have two openings formed at their respective ends.

[0052] It can be understood that one opening is used for fluid inlet and the other opening is used for fluid outlet.

[0053] It is important to note that the rotation center of the main shaft 231 coincides with the arc center of the first limiting surface 211 and the second limiting surface 212. The first adjustment block 232 is cylindrical, and its radius is smaller than the arc radius of the first limiting surface 211. Furthermore, the outer surface of the first adjustment block 232 always maintains at least one generatrix aligned with the first limiting surface 211 or the second limiting surface 212.

[0054] As will be understood, the first adjustment block 232 is eccentrically positioned relative to the main shaft 231. As the main shaft 231 rotates, one side of the first adjustment block 232 abuts against the first limiting surface 211 or the second limiting surface 212, preventing fluid from flowing through this position. A gap remains between the other side of the first adjustment block 232 and the second limiting surface 212 or the first limiting surface 211, allowing fluid to flow through this gap. Therefore, by rotating the main shaft 231 to adjust the position of the first adjustment block 232 within the adjustment chamber 210, the size of the gap can be adjusted, further enabling flow rate regulation.

[0055] It can be understood that the adjustment mechanism 230 adopts a main shaft 231 and an eccentrically arranged cylindrical first adjustment block 232, and the size of the gap between the first adjustment block 232 and the arc-shaped limit surface is changed by rotating the main shaft 231. Since the rotation center of the main shaft 231 coincides with the arc center of the limit surface, the gap change follows the geometric law and is uniformly controllable, which can achieve continuous linear adjustment of the flow from fine-tuning to full scale, avoiding the step-like fluctuations of traditional valve adjustment and meeting the needs of high-precision flow control. At the same time, the first limit surface 211 and the second limit surface 212 are concentric arc segments, and their arc-shaped outer surfaces are always aligned with the busbar of the first adjustment block 232 to ensure that the fluid pressure acts evenly on both sides of the first adjustment block 232 during the adjustment process, avoiding jamming or vibration caused by eccentric loading. When the first adjustment block 232 is aligned with any limit surface, a stable flow channel is formed in the gap area, the fluid resistance is small and the flow state is uniform, which can reduce the pressure loss by 20%-30%.

[0056] It should be noted that a first connection point 2110 and a second connection point 2120 are respectively provided on the first limiting surface 211 and the second limiting surface 212. Specifically, when the first adjustment block 232 is in the first locking position, the outer side surface of the first adjustment block 232 is connected to the first connection point 2110 and the second connection point 2120. Since the first limiting surface 211 and the second limiting surface 212 are different arc segments of a circle, and a generatrix of the outer side surface of the first adjustment block 232 is aligned with the first limiting surface 211 and the second limiting surface 212, when the first adjustment block 232 is in the first locking position, the outer side surface of the first adjustment block 232 cannot be aligned with the first limiting surface 211 and the second limiting surface 212. At this time, a certain gap appears on both sides of the first adjustment block 232, allowing fluid to pass through. Based on this, when the first adjustment block 232 is in the first locked position, the limiting mechanism 240 releases the lock between the first adjustment block 232 and the main shaft 231, allowing the first adjustment block 232 and the main shaft 231 to slide relative to each other. Therefore, under the impact force of the fluid itself, the first adjustment block 232 moves upward. The outer surface of the first adjustment block 232 can simultaneously contact the first connection point 2110 and the second connection point 2120. At this point, the first adjustment block 232 can completely block the second fluid channel 221, achieving a flow-blocking effect.

[0057] As will be appreciated, in the first locked position, the limit mechanism 240 is unlocked, and the fluid impact pushes the first adjustment block 232 upward, causing its outer surface to simultaneously contact the first connection point 2110 and the second connection point 2120, completely blocking the second fluid channel 221. This mechanism, which requires no additional drive components and relies on fluid dynamics to automatically trigger flow cutoff, can quickly achieve rapid shutdown in emergency conditions such as pipeline leaks and abnormal pressure increases, preventing accidents from escalating and enhancing the inherent safety of the system.

[0058] Furthermore, by switching between the locked and unlocked states of the limit mechanism 240, the system can freely switch between "normal flow regulation" and "emergency shutoff" modes. Specifically, in regulation mode, the main shaft 231 drives the first regulating block 232 to rotate, controlling the flow rate by adjusting the gap size, which is suitable for precise flow control under steady-state conditions. In shutoff mode, fluid pressure automatically pushes the first regulating block 232 to block the channel, providing safety protection in the event of sudden failures. This eliminates the need for additional control commands and provides a more reliable response mechanism.

[0059] In one embodiment, a first sliding groove 2320 is provided on the first adjustment block 232 , and a first limiting block 2321 is fixedly connected to the main shaft 231 . The first adjustment block 232 is connected to the first limiting block 2321 through the first sliding groove 2320 so as to be slidably connected to the main shaft 231 .

[0060] Furthermore, the limiting mechanism 240 can be allowed to be hydraulically driven. A plurality of driving rods 241 are provided on the first limiting block 2321 along the opposite direction of the sliding of the first adjusting block 232, and a plurality of limiting cavities 242 are provided on the first limiting block 2321. The driving rod 241 is located in the limiting cavity 242, and a hydraulic channel is provided in the driving rod 241. During the flow regulation process, the hydraulic pressure in the driving rod 241 fills the limiting cavity 242, so that the first adjusting block 232 and the main shaft 231 are in a relatively fixed state. When the first adjusting block 232 needs to cut off the flow, the pressure in the limiting cavity 242 can be relieved, so that the first adjusting block 232 and the main shaft 231 are in a relatively sliding state.

[0061] As will be appreciated, the hydraulically driven drive rod 241 controls the relative fixed / sliding state of the first adjustment block 232 and the main shaft 231 through pressure changes within the limiting chamber 242. When pressure is maintained, the limiting chamber 242 is filled with hydraulic oil, and the drive rod 241 presses against the first adjustment block 232, forming a rigid connection between the first chute 2320 and the limiting block, ensuring that the first adjustment block 232 does not deviate during flow regulation. During pressure relief, the hydraulic channel is depressurized, and the drive rod 241 retracts into the limiting chamber 242, releasing the mechanical lock. The first adjustment block 232 can slide freely along the first chute 2320, providing freedom of movement for the flow interception operation. Simultaneously, the first adjustment block 232 is slidably connected to the first limiting block 2321 on the main shaft 231 via the first chute 2320, forming a linear guide mechanism. When the flow interception mode is triggered, the first adjustment block 232 can rapidly move upward along the first chute 2320 under the impact of the fluid.

[0062] Simultaneously, when the limiter mechanism 240 releases pressure, the fluid impact force directly acts on the first adjustment block 232, pushing it upward along the first chute 2320 to the intercepting position. This fluid dynamics and hydraulic pressure relief form a linkage mechanism, eliminating the need for an additional power source. During the intercepting process, the sliding displacement of the first adjustment block 232 is linearly related to the fluid pressure, ensuring the stability of the intercepting action and avoiding the nonlinear fluctuations associated with traditional mechanical spring drives.

[0063] It's important to note that the hydraulic limiter mechanism 240 is directly connected to the control unit 300. The hydraulic pressure is adjusted via an electro-hydraulic proportional valve, enabling stepless adjustment of the locking force to accommodate fluids of varying viscosities. A hydraulic system pressure sensor provides real-time feedback on the locking status, forming a closed-loop monitoring loop with the control unit 300. Abnormal pressure levels automatically trigger an alarm, enhancing system operational safety.

[0064] In one embodiment, the flow regulating unit 200 further includes an adaptive fine-tuning mechanism 250 to achieve adaptive flow regulation. Specifically, the adaptive fine-tuning mechanism 250 includes a slide rod 251 and an adjustment piston 252 connected to the end of the slide rod 251. The slide rod 251 is slidably connected to the second connecting housing 220. The second connecting housing 220 defines a first chamber 253 and a second chamber 254. The slide rod 251 is fixedly connected to a protrusion 255 within the first chamber 253, and a thrust spring 256 is disposed between the protrusion 255 and the ground of the first chamber 253. A balancing channel 257 is defined on the sidewall of the second connecting housing 220. One end of the balancing channel 257 is connected to the second chamber 254, and the other end of the balancing channel 257 is connected to the pipeline upstream of the first regulating block 232. Therefore, during the actual regulation process, fluid can act on the adjustment piston 252 through the balancing channel 257.

[0065] It should be noted that a plurality of sealing rings 2520 are sleeved on the outer diameter of the regulating piston 252 to form a multiple sealing barrier.

[0066] Specifically, the balancing channel 257 introduces the pressure from the upstream pipeline of the first regulating block 232 into the second chamber 254, where it acts on the regulating piston 252 to generate thrust, forming a force-balancing system with the thrust spring 256 within the first chamber 253. When upstream flow fluctuations cause pressure changes, the balance between the piston thrust and the spring force is disrupted, and the slide rod 251 automatically drives the regulating mechanism 230 to move without the need for additional electrical control signals, achieving mechanically linked adaptive adjustment of "pressure-flow". Furthermore, the elastic coefficient of the thrust spring 256 can be preset according to the operating conditions, ensuring a linear relationship between the fine-tuning amount and pressure fluctuations, ensuring a stable and oscillatory adjustment process.

[0067] It's important to note that first chamber 253 and second chamber 254 are linked via slide rod 251, forming a pressure buffer structure in conjunction with thrust spring 256. When upstream pressure suddenly changes, the spring compresses and expands to absorb the impact energy, limiting the displacement of regulating piston 252 to a safe range and preventing flow overshoot caused by excessive adjustment.

[0068] Furthermore, the adaptive fine-tuning mechanism 250 automatically compensates for adjustment deviations caused by component wear. When the clearance between the first slide groove 2320 and the stopper increases due to wear, upstream pressure fluctuations automatically adjust the displacement of the slide rod 251 through piston thrust, maintaining flow regulation accuracy. Furthermore, when the thrust spring 256 becomes fatigued, it self-compensates through its own deformation stress, thus avoiding the long-term accumulation of adjustment errors caused by sensor drift in traditional electronic control systems.

[0069] In one embodiment, a third connecting housing 260 is further included, in which an eccentric wheel 261 is rotatably connected. The eccentric wheel 261 is connected to a drive motor 262 for driving its rotation. The drive motor 262 is electrically connected to the control unit 300. The outer diameter of the eccentric wheel 261 is connected to the end of the slide rod 251. By rotating the eccentric wheel 261, the position of the piston 252 and the slide rod 251 within the second connecting housing 220 can be adjusted, thereby achieving flow control.

[0070] It is understood that the eccentricity between the rotation center of the eccentric wheel 261 and the geometric center is designed so that the displacement of the slide bar 251 is precisely linearly related to the rotation angle of the eccentric wheel 261. By driving the servo motor to adjust the rotation angle of the eccentric wheel 261 by the control unit 300, the displacement accuracy of the slide bar 251 can be effectively improved.

[0071] In one embodiment, the control unit 300 is communicatively connected to the flow measurement unit 100 and the flow regulation unit 200. The control unit 300 can adjust the flow in the measurement pipeline through the flow regulation unit 200 based on a preset flow threshold and the real-time flow in the measurement pipeline obtained by the flow measurement unit 100.

[0072] Specifically, the control unit 300 can use a proportional-integral-differential PID algorithm to compare the preset flow threshold with the real-time data fed back by the measurement unit in real time, greatly improving the adjustment effect of the device during actual use.

[0073] In summary, the present invention provides a pressure-balanced, high-pressure flow automatic controller. Its control unit 300 electrically connects the flow measurement unit 100 with the regulating unit, forming a closed-loop "measurement-calculation-execution" system. Using a PID algorithm, the control unit 300 dynamically adjusts the eccentric wheel 261's rotation angle, hydraulic locking status, and displacement of the adaptive slider 251 of the regulating unit to ensure flow regulation accuracy, meeting the requirements for high-precision, stable control under high-pressure conditions.

[0074] Furthermore, the adjustment unit utilizes an eccentrically rotating cylindrical first adjustment block 232, which rotates the main shaft 231 to achieve continuous linear adjustment of the flow rate from 0-100%, avoiding the step-like fluctuations associated with traditional valves. Combined with the mechanical feedback of the adaptive fine-tuning mechanism 250, this automatically compensates for flow fluctuations.

[0075] By locking and unlocking the hydraulic limiter 240, the adjustment unit can switch freely between "precision adjustment" and "emergency shutoff" modes. This provides passive safety protection without relying on electronic control, effectively improving the safety level.

[0076] The above-described specific embodiments of the present invention do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A pressure-balanced high-pressure flow automatic controller, characterized in that: include: A flow measurement unit (100) is connected to the measurement pipeline; A flow regulating unit (200) is provided at the rear end of the flow measuring unit (100), and is provided with a regulating cavity (210) connected to the measuring pipeline, and a regulating mechanism (230) for flow regulation is provided in the regulating cavity (210), wherein the regulating mechanism (230) comprises: a main shaft (231) rotatably disposed in the adjustment chamber (210) along a first direction, and a power source for driving the main shaft (231) to rotate is connected to the main shaft (231); and a first adjusting block (232) connected to the main shaft (231) so as to be movably connected along a radial direction of the main shaft (231), and a limiting mechanism (240) for relatively fixing the main shaft (231) and the first adjusting block (232) is provided between the first adjusting block (232) and the main shaft (231); The regulating cavity (210) comprises a first limiting surface (211) and a second limiting surface (212), and the outer side surface of the first regulating block (232) is connected to the first limiting surface (211) and / or the second limiting surface (212); A control unit (300) is communicatively connected to the flow measurement unit (100) and the flow regulation unit (200), wherein the control unit (300) can regulate the flow in the measurement pipeline through the flow regulation unit (200) based on a preset flow threshold and the real-time flow in the measurement pipeline obtained through the flow measurement unit (100).

2. The pressure-balanced high-pressure flow automatic controller according to claim 1, characterized in that: The flow measurement unit (100) comprises a first connecting housing (110), wherein a first fluid channel (111) is provided in the first connecting housing (110); A flow meter (112) for measuring the flow of fluid in the first fluid channel (111) is connected to the path of the first fluid channel (111), and the flow meter (112) is electrically connected to the control unit (300).

3. The pressure-balanced high-pressure flow automatic controller according to claim 2, characterized in that: The flow measuring instrument (112) adopts an electromagnetic flow meter.

4. The pressure-balanced high-pressure flow automatic controller according to claim 1, characterized in that: The flow regulating unit (200) comprises a second connecting shell (220), and a second fluid channel (221) is provided in the second connecting shell (220); The regulating chamber (210) is arranged in the second fluid channel (221), and the first limiting surface (211) and the second limiting surface (212) are symmetrically arranged.

5. The pressure-balanced high-pressure flow automatic controller according to claim 4, characterized in that: A first connection point (2110) is provided on the first limiting surface (211), and a second connection point (2120) is provided on the second limiting surface (212); Wherein, when the first adjustment block (232) is located at the first locking position, the outer side surface of the first adjustment block (232) is connected to the first connection point (2110) and the second connection point (2120).

6. The pressure-balanced high-pressure flow automatic controller according to claim 4, characterized in that: The flow regulating unit (200) further includes an adaptive fine-tuning mechanism (250), comprising: A sliding rod (251) is slidably connected to the second connecting shell (220), and an adjusting piston (252) is fixedly connected to the end of the sliding rod (251); The second connecting shell (220) is provided with a first chamber (253) and a second chamber (254); The slide bar (251) is fixedly connected to a protrusion (255) in the first chamber (253), and a thrust spring (256) is provided between the protrusion (255) and the ground of the first chamber (253), and A balancing channel (257) is provided on the side wall of the second connecting shell (220), one end of the balancing channel (257) is connected to the second chamber (254), and the other end of the balancing channel (257) is connected to the measuring pipeline upstream of the first regulating block (232).

7. The pressure-balanced high-pressure flow automatic controller according to claim 6, characterized in that: A plurality of sealing rings (2520) are sleeved on the outer diameter of the regulating piston (252).

8. The pressure-balanced high-pressure flow automatic controller according to claim 7, characterized in that: It also includes a third connecting shell (260), in which an eccentric wheel (261) is rotatably connected, and the eccentric wheel (261) is connected to a driving motor (262) for driving the eccentric wheel (261) to rotate, and the driving motor (262) is controlled and connected to the control unit (300); Wherein, the outer diameter of the eccentric wheel (261) is connected to the end of the sliding rod (251).

9. The pressure-balanced high-pressure flow automatic controller according to claim 1, characterized in that: A first sliding groove (2320) is provided on the first adjusting block (232), and a first limiting block (2321) is fixedly connected to the main shaft (231). The first adjusting block (232) is connected to the first limiting block (2321) through the first sliding groove (2320) so as to be slidably connected to the main shaft (231).

10. The pressure-balanced high-pressure flow automatic controller according to claim 1, characterized in that: The first limiting surface (211) and the second limiting surface (212) are respectively arc-shaped surfaces, and the arc centers of the two limiting surfaces coincide with each other; and The rotation center of the main shaft (231) coincides with the arc center of the two limiting surfaces.

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