Self-adaptive adjustment LPG (Liquefied Petroleum Gas) generator set fuel gas mixing efficient control device

Abstract

The invention discloses a self-adaptive adjustment LPG generator set fuel gas mixing efficient control device, and relates to the technical field of generator set operation control, the self-adaptive adjustment LPG generator set fuel gas mixing efficient control device comprises three or more multi-stage fuel gas injection valve banks, and through cooperative work of the multi-stage fuel gas injection valve banks, a dynamic pressure stabilization adjustment assembly and a pneumatic ball valve, the multi-stage fuel gas injection valve banks and the dynamic pressure stabilization adjustment assembly are combined to achieve efficient control of fuel gas mixing. According to real-time changes of fuel gas components and engine loads, fuel gas injection can be accurately adjusted, the stability and adjusting precision of fuel gas injection are effectively improved through a first proportional adjusting rotating vane and a second proportional adjusting rotating vane in the dynamic pressure stabilizing adjusting assembly, the mixing uniformity of fuel gas and air is improved, sufficient combustion of fuel gas is promoted, and the fuel gas injection efficiency is improved. And secondly, due to the accurate control capacity of a gear rack structure and a connecting rod structure, the assembly can quickly respond to the adjusting requirements under different working conditions, and the stability and reliability of gas injection are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of generator set operation control, and specifically relates to a high-efficiency control device for gas mixing of an LPG generator set with adaptive regulation. Background Art

[0002] Gas generator sets fueled by liquefied petroleum gas have been widely used in various industries. However, the gas source pressure used in the above gas generator sets is relatively low, generally below 30 kPa. It is precisely because such generator sets require a low gas pressure and have a wide adaptability during operation that this type of gas generator set is currently the most widely used in the market.

[0003] Currently, the gas composition often changes, and the existing control method has a slow response. For example, in the case of a low gas source, the traditional control mode has a narrow adaptation range (about 20%), and it is unable to adjust the gas-air ratio in a timely manner, affecting the power generation efficiency. In addition, the fixed-section air intake duct cannot dynamically match the change in gas flow rate. For example, when the air volume needs to be reduced by 20% under low gas conditions, the traditional damper adjustment accuracy is only ±5%, and affected by pipeline resistance, the actual air flow error can reach ±8%, resulting in an insufficient response speed to changes in gas composition. Therefore, it is necessary to propose a high-efficiency control device for gas mixing of an LPG generator set with adaptive regulation. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-efficiency control device for gas mixing of an LPG generator set with adaptive regulation, so as to solve the problems raised in the above background art, such as the slow response of the existing control method, the narrow adaptation range (about 20%) of the traditional control mode under low gas sources, the inability to adjust the gas-air ratio in a timely manner, affecting the power generation efficiency, and the fixed-section air intake duct being unable to dynamically match the change in gas flow rate. For example, when the air volume needs to be reduced by 20% under low gas conditions, the traditional damper adjustment accuracy is only ±5%, and affected by pipeline resistance, the actual air flow error can reach ±8%, resulting in an insufficient response speed to changes in gas composition.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-efficiency control device for gas mixing of an LPG generator set with adaptive regulation, including at least three groups of multi-stage gas injection valve groups; The multi-stage gas injection valve group includes a pneumatic ball valve, an injection pipeline, and a dynamic pressure stabilizing and regulating component. The air outlet end of the pneumatic ball valve is connected to the injection pipeline and is used to quickly open and close according to the instruction of an external electronic controller. The dynamic pressure stabilizing and regulating component is installed inside the throat end of the injection pipeline and is used to dynamically regulate gas injection; The dynamic voltage stabilization and regulation component includes a first proportional regulation rotor blade and a second proportional regulation rotor blade, with their blade surfaces facing in opposite directions. The number of blades of the first proportional regulation rotor blade is more than that of the second proportional regulation rotor blade. It is rotationally driven by a gear-rack structure, and its spacing is adjusted by a connecting rod structure.

[0006] Preferably, the gear-rack structure consists of a chute rod, a rack, a stroke chute, and a rotating gear. The stroke chute is opened on the surface of the chute rod, and the rack meshes with the rotating gear.

[0007] Preferably, the connecting rod structure consists of a transmission rod and a variable-frequency servo motor. The side end of the transmission rod is installed on the top surface of the stroke slider.

[0008] Preferably, a pulley structure is sleeved outside the output shaft of the variable-frequency servo motor, and a synchronous rotating shaft is sleeved inside the side end of the pulley structure.

[0009] Preferably, the pneumatic ball valve consists of a pneumatic driving source, a ball valve, and a fine flow adjustment component. The fine flow adjustment component is equally divided and installed around the surface of the ball valve for fine flow compensation.

[0010] Preferably, the fine flow adjustment component includes an adjustment end, and rotating plate surfaces are symmetrically installed at the left and right ends of the adjustment end.

[0011] Preferably, a rotating joint shaft is arranged inside the rotating plate surface, and a transmission ring plate is connected to the side end of the rotating joint shaft.

[0012] Preferably, a control connection part is installed on the side wall surface of the transmission ring plate, a shape memory metal section is installed at the bottom of the side end of the control connection part, and multiple temperature control columns are embedded in the shape memory metal section.

[0013] Preferably, the side end of the shape memory metal section is slidably connected to a stroke track groove.

[0014] Preferably, a single-stage controller is installed at the side end of the stroke track groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the collaborative work of the multi-stage gas injection valve group, the dynamic pressure stabilization and regulation component, and the pneumatic ball valve, it is possible to achieve precise regulation of gas injection according to the real-time changes in gas composition and engine load. The first proportional regulation rotor and the second proportional regulation rotor in the dynamic pressure stabilization and regulation component can effectively improve the stability and regulation accuracy of gas injection, enhance the mixing uniformity of gas and air, thereby promoting the full combustion of gas and improving the efficiency of the generator set. Secondly, the precise control capabilities of the gear-rack structure and the connecting rod structure enable the component to quickly respond to the regulation requirements under different working conditions, ensuring the stability and reliability of gas injection. In addition, the setting of the eddy current suppression plate effectively reduces the eddy current in the gas, reduces the energy loss during gas injection, and further improves the performance of the entire system. The fine-tuning flow component of the pneumatic ball valve can finely compensate the gas flow rate, ensure full combustion of the gas, improve the efficiency and performance of the LPG generator set. At the same time, the pressure monitoring device and the flow monitoring device on the gas delivery pipeline provide accurate data support for the entire control system, further enhancing the adaptive regulation ability of the device. Description of the Drawings

[0016] Figure 1 It is a front view structural schematic diagram of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 2 It is a structural schematic diagram of a single valve group of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 3 It is a structural schematic diagram of the installation position of the fine-tuning flow component of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 4 It is an exploded structural schematic diagram of the pneumatic ball valve of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 5 It is a structural schematic diagram of the fine-tuning flow component of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 6 It is a partial structural separation schematic diagram of the fine-tuning flow component of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 7 It is a structural schematic diagram of the installation position of the dynamic pressure stabilization and regulation component of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 8 It is a structural schematic diagram of the dynamic pressure stabilization and regulation component of a gas mixing and high-efficiency control device for an adaptive regulation LPG generator set according to the present invention; Figure 9 This is a partial structural schematic diagram of the dynamic voltage stabilizing and regulating component in an LPG generator set gas mixing efficient control device with adaptive regulation according to the present invention; Figure 10 In an LPG generator set gas mixing efficient control device with adaptive regulation according to the present invention Figure 9 Schematic diagram of the enlarged structure at position A.

[0017] In the figure: 100, gas supply source; 200, gas delivery pipeline; 300, valve port; 400, pneumatic ball valve; 500, flange mounting part; 600, injection pipeline; 700, dynamic voltage stabilizing and regulating component; 701, variable frequency servo motor; 702, pulley structure; 703, electromagnetic blocker mounting rod; 704, synchronous rotating shaft; 705, up and down swing driving structure; 706, eddy current suppression plate; 707, chute rod; 708, transmission rod; 709, first proportional regulation rotating blade; 710, second proportional regulation rotating blade; 711, stroke chute; 712, rack; 713, stroke slider; 714, rotating gear; 715, rotating shaft; 800, fine-tuning flow component; 801, adjusting end; 802, rotating plate surface; 803, transmission ring plate; 804, regulation connecting piece; 805, shape memory metal section; 806, temperature control column; 807, stroke track groove; 808, single-stage controller. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] According to the overall content, in the field of gas mixing control of existing LPG generator sets, traditional devices can achieve basic gas delivery and mixing functions, etc. However, in actual complex working conditions, due to problems such as the lack of accurate perception and dynamic regulation mechanisms for the real-time changes of gas composition and engine load in traditional devices, incomplete gas combustion and low efficiency of the generator set are caused. In addition, the single regulation structure and limited regulation accuracy of traditional devices are difficult to adapt to diverse operation requirements.

[0020] The present invention is completed to solve the problems of the prior art. By adopting a multi-stage gas injection valve group, the multi-stage gas injection valve group is respectively set to three groups or more. The multi-stage gas injection valve group cooperates with a dynamic pressure stabilizing adjustment component 700 that can be dynamically adjusted in real time according to the gas composition and engine load, and a pneumatic ball valve 400 with a flow fine compensation function, realizing precise control of gas injection. At the same time, the pressure monitoring device and flow monitoring device on the gas delivery pipeline 200 provide accurate data for the external electronic controller, further optimizing the control strategy, and effectively improving the gas mixing efficiency and overall performance of the LPG generator set.

[0021] In an embodiment of the present invention, referring to Figure 1 and Figure 2 as shown: An efficient control device for gas mixing of an LPG generator set with adaptive adjustment includes a multi-stage gas injection valve group. The multi-stage gas injection valve group is respectively set to three groups or more. The multi-stage gas injection valve group is used to accurately control the flow rate and pressure of gas according to the instructions of the external electronic controller, so that when the engine load suddenly changes, the external electronic controller can quickly control the corresponding multi-stage gas injection valve group to act and quickly adjust the gas injection volume; The multi-stage gas injection valve group includes a pneumatic ball valve 400, an injection pipeline 600, and a dynamic voltage stabilizing and regulating component 700. The gas outlet end of the pneumatic ball valve 400 is connected to the injection pipeline 600 and is used to quickly open and close according to the instructions of an external electronic controller. The dynamic voltage stabilizing and regulating component 700 is installed inside the throat end of the injection pipeline 600 and is used to dynamically regulate gas injection according to the real-time changes in gas composition and engine load. That is, during the regulation process, a gas composition detection sensor and a pressure sensor continuously monitor the actual state of the gas and feed the data back to the external electronic controller. The external electronic controller compares the actual value with the target value and calculates the deviation. If the actual gas flow rate is less than the target flow rate, the external electronic controller further increases the operating condition of the dynamic voltage stabilizing and regulating component 700 (such as increasing the distance or rotation speed between the first proportional regulating rotor 709 and the second proportional regulating rotor 710), or increases the opening degree of the pneumatic ball valve 400. When the gas temperature changes, the fine-tuning flow component 800 of the pneumatic ball valve 400 comes into play. When the temperature rises, the fine-tuning flow component 800 reduces the cross-sectional area of the local flow path of the pneumatic ball valve 400 to reduce the gas flow rate. Through continuous feedback and optimization, it is ensured that the gas injection is always in the best state, improving the efficiency and stability of the generator set. At the same time, if the electrical load of the generator set suddenly increases at this time, the load sensor in the engine detects signals such as a decrease in engine speed and an increase in throttle opening, indicating that the engine needs more power output. The external electronic controller calculates the required increased gas volume and pressure based on this information and sends new instructions to the dynamic voltage stabilizing and regulating component 700, the fine-tuning flow component 800, and the pneumatic ball valve 400. After receiving the instructions, they immediately increase the valve opening degree and increase the cross-sectional area of the flow path to ensure the pressure stability of the gas during injection, thereby achieving efficient gas mixing and combustion.

[0022] In a specific solution, during operation, the external electronic controller reads the initial values of the sensors (gas composition detection sensor and pressure sensor) built into the injection pipeline 600 and removes noise through an adaptive Kalman filter algorithm. Then, according to the engine model (such as 100kW / 200kW) and gas type (LPG / mixed air gas), it automatically loads a preset air-fuel ratio MAP diagram. As required, the electronic controller collects 100 sets of data per second and predicts the changing trend of gas composition (such as a 3% decrease in propane content) and engine load fluctuations (such as a 15% increase in torque) in the next 500ms through a neural network model. When calculating the target gas flow rate and pressure (such as the current air-fuel ratio is 12.5, the target air-fuel ratio is 12.8, and the gas flow rate needs to be increased by 5%) based on the prediction results and combined with the air-fuel ratio MAP diagram, through the operation of the dynamic voltage stabilizing and regulating component 700, the dynamic decoupling regulation of gas flow rate and pressure is achieved, and the regulation accuracy and response speed under complex working conditions are increased by 3 to 5 times.

[0023] In some embodiments, according to Figures 7 - 10 As shown, the dynamic voltage regulation component 700 includes a first proportional regulation rotor blade 709 and a second proportional regulation rotor blade 710, with their blade surface directions opposite to each other. The first proportional regulation rotor blade 709 and the second proportional regulation rotor blade 710 are arranged along the curvature of the internal curve of the injection pipeline 600, so that the gas can be continuously and evenly regulated when passing through these two rotor blades. At the same time, their blade surface directions are opposite, that is, the blade surface of the first proportional regulation rotor blade 709 is inclined in the clockwise direction, and the blade surface of the second proportional regulation rotor blade 710 is inclined in the counterclockwise direction, so that a special flow effect will be generated when the gas passes through the rotor blades, which helps to break the eddy current in the gas and improve the mixing uniformity of the gas. The number of blades of the first proportional regulation rotor blade 709 is more than that of the second proportional regulation rotor blade 710. It rotates through a rack and pinion structure. The blade surface angle of the first proportional regulation rotor blade 709 is 30°, and the blade surface angle of the second proportional regulation rotor blade 710 is 60°. The first proportional regulation rotor blade 709 is a contraction-type rotor blade (30° blade surface angle) to accelerate the gas passing through the throat and utilize the Venturi effect to reduce the static pressure, while the second proportional regulation rotor blade 710 is an expansion-type rotor blade (60° blade surface angle) to restore the pressure through the diffuser section, which conforms to Bernoulli's equation. The reverse rotation of the two rotor blades can generate a shear flow to break large-scale eddy currents, and their spacing is adjusted through a connecting rod structure. Through different numbers of blades and blade surface angles, the two rotor blades have different effects on the gas during rotation. For example, the first proportional regulation rotor blade 709 has more blades and a smaller blade surface angle, and it can finely regulate the gas, change the flow direction and speed of the gas, and increase the turbulence degree of the gas, thereby promoting the mixing of the gas and air. The second proportional regulation rotor blade 710 has fewer blades and a larger blade surface angle, which is used to stabilize the gas pressure and further comb the gas flow field, so that the gas regulated by the first proportional regulation rotor blade 709 can enter the subsequent injection pipeline 600 with a stable pressure and a uniform flow state.

[0024] The rack and pinion structure consists of a chute rod 707, a rack 712, a travel chute 711, and a pinion 714. The travel chute 711 is formed on the surface of the chute rod 707. The rack 712 is arranged on the inner side of the chute rod 707. A travel slider 713 is arranged outside the pinion 714. The rack 712 meshes with the pinion 714. The central end of the pinion 714 is connected to a rotating shaft 715. The bottom end of the rotating shaft 715 is respectively connected to a first proportional adjustment vane 709 and a second proportional adjustment vane 710. When the travel slider 713 moves linearly in the travel chute 711, it can drive the pinion 714 and the rack 712 to perform a rotating operation. And an electromagnetic blocker one is arranged on the side end of the pinion 714 to adjust the rotation of the first proportional adjustment vane 709 and the second proportional adjustment vane 710. When the pinion 714 rotates driven by the rack 712, the rotating shaft 715 will rotate accordingly, thereby driving the first proportional adjustment vane 709 and the second proportional adjustment vane 710 to rotate synchronously. By precisely controlling the linear movement speed and displacement of the rack 712, the rotation speed and angle of the vane can be accurately adjusted, so as to meet the adjustment requirements of gas injection under different working conditions.

[0025] The connecting rod structure consists of a transmission rod 708 and a variable frequency servo motor 701. The side end of the transmission rod 708 is arranged on the top surface of the travel slider 713. The transmission rod 708 is arranged in two symmetric groups and installed in sequence. The output end of the variable frequency servo motor 701 is connected to one side of the two symmetric transmission rods 708. Through the symmetric and sequentially installed transmission rods 708, the acting forces received by the first proportional adjustment vane 709 and the second proportional adjustment vane 710 are uniform, avoiding eccentricity or instability. And the variable frequency servo motor 701 has high-precision speed control and position control capabilities. By controlling its output speed and rotation direction, the transmission rod 708 can be accurately driven to move. When the transmission rod 708 moves, it will drive the travel slider 713 to move on the chute rod 707, and then change the rotation angle and position of the first proportional adjustment vane 709 and the second proportional adjustment vane 710 through the rack and pinion structure, realizing the adjustment of the distance between the two vanes. Adjusting the distance between the two vanes can change the flow area and flow resistance of the gas when passing through the vanes, thereby further adjusting the pressure and flow rate of the gas to adapt to different gas components and engine load changes.

[0026] An output shaft of a variable-frequency servo motor 701 is externally sleeved with a pulley structure 702. The pulley structure 702 functions to transmit power, smoothly transmitting the power of the variable-frequency servo motor 701 to a synchronous rotating shaft 704. The synchronous rotating shaft 704 is internally sleeved at a side end of the pulley structure 702. An electromagnetic blocker mounting rod 703 is arranged on the outer circumferential side of the synchronous rotating shaft 704. The electromagnetic blocker mounting rod 703 mainly consists of an electromagnetic blocker II and a mounting rod. The electromagnetic blocker II can cut off the rotation of the synchronous rotating shaft 704 and the pulley structure 702 according to the control signal of the system, precisely controlling the rotation of the synchronous rotating shaft 704. A vertical swing driving structure 705 is arranged at a side end of the synchronous rotating shaft 704. A side end of the vertical swing driving structure 705 is connected to an eddy current suppression plate 706. A spiral diversion groove is formed on an outer wall surface of the eddy current suppression plate 706. The vertical swing driving structure 705 can drive the eddy current suppression plate 706 to perform a vertical swing motion. The spiral diversion groove is formed on the outer wall surface of the eddy current suppression plate 706. When gas flows in a spray pipeline 600, the swing of the eddy current suppression plate 706 and the function of the spiral diversion groove can effectively suppress the eddy current in the gas, making the gas flow more stable and uniform. This helps to improve the gas spray effect, reduce the energy loss during the gas spraying process, and further enhance the efficiency of gas mixing. An arc wall plate is arranged at a side end of the electromagnetic blocker mounting rod 703. The arc wall plate is arranged on the outer wall surface of the spray pipeline 600. The arc wall plate can function to support the electromagnetic blocker mounting rod 703 and related components, and at the same time, can also play a certain role in strengthening the outer wall of the spray pipeline 600, improving the structural stability of the entire assembly.

[0027] In a specific solution, when an external electronic controller calculates that the gas injection needs to be adjusted according to the data of a gas composition detection sensor and a pressure sensor, as well as information such as the engine model and gas type, it will send a control signal to the variable-frequency servo motor 701. The variable-frequency servo motor 701 adjusts the output rotation speed and direction according to the control signal, and transmits the power to a connecting rod structure and a rack and pinion structure through the pulley structure 702 and the synchronous rotating shaft 704.

[0028] The connecting rod structure adjusts the distance between a first proportional adjustment vane 709 and a second proportional adjustment vane 710 through a transmission rod 708 and a stroke slider 713 to adapt to different gas flow and pressure requirements. At the same time, the rack and pinion structure drives the first proportional adjustment vane 709 and the second proportional adjustment vane 710 to rotate through the meshing movement of a rack 712 and a pinion gear 714, changing the gas flow direction and speed, and realizing the dynamic adjustment of gas injection.

[0029] The up-and-down swing drive structure 705 drives the swing of the eddy current suppression plate 706, uses the spiral diversion groove to suppress the eddy current in the gas, and ensures the stability and uniformity of the gas during the injection process. The electromagnetic blocker on the electromagnetic blocker mounting rod 703 can precisely control the rotation of the synchronous rotating shaft 704 according to the safety requirements of the system to ensure the safe operation of the equipment.

[0030] Overall, through the synergistic effect of the first proportional adjustment rotating blade 709 and the second proportional adjustment rotating blade 710, fine adjustment of gas injection can be achieved, improving the mixing uniformity of gas and air, thereby promoting the full combustion of gas and enhancing the efficiency of the generator set. Secondly, the precise control capabilities of the gear-rack structure and the linkage structure enable the components to quickly respond to the adjustment requirements under different working conditions, ensuring the stability and reliability of gas injection. In addition, the setting of the eddy current suppression plate 706 effectively reduces the eddy current in the gas, reduces the energy loss during gas injection, and further improves the performance of the entire system.

[0031] During the above adjustment process, the gas composition detection sensor and the pressure sensor will continuously monitor the actual state of the gas, such as the actual flow rate and pressure, etc. The external electronic controller will compare the actual value with the target value and calculate the deviation between the two. For example, if the target gas flow rate is 50 m³ / h and the actually monitored flow rate is 48 m³ / h, there is a deviation of 2 m³ / h.

[0032] According to the calculated deviation, the external electronic controller will correct the control instruction. If the actual flow rate is less than the target flow rate, the external electronic controller will further increase the rotation speed or spacing of the first proportional adjustment rotating blade 709 and the second proportional adjustment rotating blade 710, or increase the opening degree of the pneumatic ball valve 400 to increase the gas flow rate until the deviation between the actual value and the target value is within the allowable range, enabling the components to continuously self-adjust and ensuring that the gas injection is always in the best state.

[0033] In some embodiments, according to Figures 3 - 6 As shown, the pneumatic ball valve 400 consists of a pneumatic drive source, a ball valve, and a fine-tuning flow component 800. The fine-tuning flow component 800 is equally divided and arranged around the surface of the ball valve for fine flow compensation. Among them, the pneumatic drive source uses a double-acting cylinder (working pressure 0.4 - 0.7 MPa), and cooperates with an electromagnetic reversing valve to achieve rapid opening and closing of the ball valve by 0 - 90°. The valve body flow channel of the ball valve adopts a streamline design (flow resistance coefficient Cv = 50 - 200, adjusted according to the diameter), reducing the gas flow resistance. The fine-tuning flow component 800 is evenly arranged around the circumference of the ball valve in 4 - 8 groups (adjusted according to the ball valve diameter), and each group of components independently responds to temperature / flow signals to achieve fine compensation of ±5% of the rated flow rate.

[0034] The fine-tuning flow component 800 includes an adjustment end 801. Rotating plates 802 are symmetrically arranged at the left and right ends of the adjustment end 801. A rotating joint shaft is arranged inside the rotating plates 802. A transmission ring plate 803 is connected to the side end of the rotating joint shaft. When the adjustment end 801 rotates, the effective cross-sectional area of the ball valve flow channel can be changed to achieve fine flow adjustment. The symmetrically arranged rotating plates 802 are rigidly connected to the adjustment end 801 through the rotating joint shaft to form a double-pivot rotation mechanism.

[0035] A control connection part 804 is arranged on the side wall surface of the transmission ring plate 803. The transmission ring plate 803 converts the linear displacement of the shape memory metal section 805 into the rotational movement of the adjustment end 801. One end of the control connection part 804 is hinged to the transmission ring plate 803, and the other end is rigidly connected to the shape memory metal section 805. The shape memory metal section 805 is arranged at the bottom of the side end of the control connection part 804. The shape memory metal section 805 is made of nickel-titanium alloy (NiTi), and its initial shape is arc-shaped. When the temperature changes, the molecular chains of the nickel-titanium alloy are reorganized, driving the shape memory metal section 805 to bend towards the preset shape according to the track of the travel track groove 807. Multiple temperature control columns 806 are embedded in the shape memory metal section 805. A thermistor (accuracy ±0.5°C) and a shape memory alloy trigger element are arranged inside the temperature control columns 806. When the gas temperature change exceeds the set threshold (such as ±3°C), the thermistor transmits a signal to the single-stage controller 808, and at the same time triggers the shape memory metal section 805 to start deforming.

[0036] The travel track groove 807 is slidably connected to the side end of the shape memory metal section 805. The travel track groove 807 is arranged on the surface of the ball valve. The single-stage controller 808 is arranged at the side end of the travel track groove 807. The single-stage controller 808 is connected to multiple temperature control columns 806 through a circuit. After receiving the temperature signal of the temperature control columns 806, the single-stage controller 808 drives the heating / cooling element (built-in resistance wire, power 5 - 15W) of the shape memory metal section 805 through a PWM signal to accelerate / delay the deformation process and achieve precise control of dynamic compensation.

[0037] In a specific solution, when the gas temperature rises (such as from 25°C to 35°C): The temperature control column 806 detects a temperature change. The single-stage controller 808 calculates that the gas flow rate needs to be reduced by 2% (due to the decrease in gas density caused by the temperature increase). The single-stage controller 808 energizes the resistance wire of the shape memory metal section 805, triggering the nickel-titanium alloy to transform from the "low-temperature straight state" to the "high-temperature bent state", causing the shape memory metal section 805 to bend towards the center of the ball valve along the travel track groove 807. By adjusting the connecting member 804, the drive ring plate 803 is pulled to rotate, and then the drive ring plate 803 drives the rotating plate surface 802 and the adjustment end 801 to rotate synchronously by 5°, reducing the cross-sectional area of the local flow path of the ball valve by 3% to offset the flow deviation caused by the temperature (the measured flow rate drops from 50 m³ / h to 49 m³ / h, approaching the target value of 49 m³ / h). At this time, the pneumatic ball valve 400 is in the closed state.

[0038] When the external electronic controller detects that the actual gas flow rate is lower than the target value (such as when the air-fuel ratio is too lean), the external electronic controller sends a compensation instruction (such as increasing the flow rate by 1.5%) to the single-stage controller 808 through the CAN bus. The single-stage controller 808 drives the shape memory metal section 805 to deform in the reverse direction (recovering from the bent state to the straight state), pushing the adjustment end 801 to rotate 3° in the direction of increasing the flow path. Multiple fine-tuning flow components 800 act together, increasing the cross-sectional area of the flow path by 1.8% in total, and increasing the actual flow rate from 48.5 m³ / h to 50 m³ / h to complete the active compensation.

[0039] When the gas temperature exceeds 80 °C (the upper limit of the effective working temperature of the nickel-titanium alloy), the single-stage controller 808 triggers the "over-temperature protection mode", cuts off the power supply of the shape memory metal section 805 to prevent the alloy from overheating and failing, and at the same time sends an alarm signal to the electronic controller. The electronic controller switches to adjusting the main valve opening of the pneumatic ball valve 400 (by increasing the main valve opening by 1%) to maintain the flow rate stability and ensure the overall safe operation, avoiding engine failures or other safety accidents caused by unstable gas flow rates.

[0040] Overall, it effectively avoids the signal delay and parameter drift problems of traditional electronic control compensation, especially suitable for industrial scenarios with complex gas components and large temperature fluctuations, and significantly improves the dynamic adaptability and control accuracy of LPG generator sets.

[0041] In some embodiments, as shown in Figure 1 and Figure 2 A flange mounting member 500 is connected to the side end of the injection pipeline 600 and the output end of the pneumatic ball valve 400. The injection pipeline 600, as the downstream channel for gas transportation, is tightly connected to the output end of the pneumatic ball valve 400 through the flange mounting member 500. The flange mounting member 500 is made of high-strength and corrosion-resistant metal materials, such as stainless steel or aluminum alloy, to ensure the sealing and stability of the connection.

[0042] On the other side of the pneumatic ball valve 400, a valve port 300 is installed. The valve port 300 serves as the inlet for gas to enter the pneumatic ball valve 400. Its design has been optimized to ensure that the gas can flow in smoothly and steadily. The inner wall of the valve port 300 is treated with a smooth surface to reduce the resistance of gas flow. At the same time, its caliber size is precisely calculated and designed according to the flow demand and pressure requirement of the system. A gas delivery pipeline 200 is connected to the side end of the valve port 300. The gas delivery pipeline 200 is made of seamless steel pipe or high-strength plastic pipe, with good pressure resistance and corrosion resistance. A gas supply source 100 is connected to the side end of the gas delivery pipeline 200. The gas supply source 100 is usually a large LPG storage tank or a gas pipeline network, providing a stable LPG gas supply for the multi-stage gas injection valve group. Pressure monitoring devices and flow monitoring devices are also installed on the gas delivery pipeline 200. The pressure monitoring device usually adopts a high-precision pressure sensor, such as a strain type pressure sensor, and the flow monitoring device is a turbine flow sensor, which are respectively used to monitor the pressure and flow of the gas before entering the pneumatic ball valve 400 in real time, and the monitoring data is transmitted to an external electronic controller, so that the external electronic controller can accurately control the pneumatic ball valve 400 and the dynamic voltage stabilizing adjustment component 700 according to the data. The pressure monitoring device transmits the monitored pressure data to the external electronic controller through cable or wireless communication. The electronic controller adjusts the opening degree of the pneumatic ball valve 400 according to the preset pressure threshold and control algorithm to maintain the stability of the gas pressure. The flow monitoring device transmits the monitored flow data to the external electronic controller as well. The external electronic controller accurately controls the pneumatic ball valve 400 and the dynamic voltage stabilizing adjustment component 700 according to the working condition of the engine and the gas demand, combined with the pressure data and other relevant parameters. For example, when the engine load increases, the electronic controller increases the opening degree of the pneumatic ball valve 400 appropriately according to the data feedback by the flow monitoring device, and adjusts the parameters of the dynamic voltage stabilizing adjustment component 700 to increase the gas supply volume to ensure the normal operation of the engine.

[0043] That is, when the pressure monitoring device detects that the gas pressure is too high, the external electronic controller will issue an instruction to reduce the opening degree of the pneumatic ball valve 400, and make the fine-tuning flow component 800 operate, and at the same time adjust the parameters of the dynamic voltage stabilizing adjustment component 700, such as adjusting the rotation speed and spacing of the first proportional adjustment vane 709 and the second proportional adjustment vane 710 to reduce the gas pressure. On the contrary, when the pressure is too low, the electronic controller will increase the opening degree of the pneumatic ball valve 400 and adjust the parameters of the dynamic voltage stabilizing adjustment component 700 accordingly to increase the gas pressure.

[0044] For flow control, the electronic controller cooperatively controls the pneumatic ball valve 400 and the dynamic voltage stabilization adjustment component 700 according to the operating conditions of the engine and the gas demand, and in combination with the data fed back by the flow monitoring device. During the engine startup phase, the external electronic controller will quickly adjust the opening degrees of the pneumatic ball valve 400 and the fine-tuning flow component 800 and the parameters of the dynamic voltage stabilization adjustment component 700 according to the preset startup program to provide sufficient gas volume to ensure the smooth startup of the engine. During the normal operation of the engine, the external electronic controller will monitor the flow data in real time and dynamically adjust the gas supply volume according to the load change of the engine to achieve the best air-fuel ratio and combustion efficiency.

[0045] The wiring diagrams of the gas composition detection sensor, pressure sensor, turbine flow sensor, strain gauge pressure sensor, and single-stage controller 808 in the present invention belong to the common knowledge in the art. Their working principles are already known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the gas composition detection sensor, pressure sensor, turbine flow sensor, strain gauge pressure sensor, and single-stage controller 808 will not be explained in detail.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An efficiently controlled device for LPG generator set gas mixing with adaptive adjustment, characterized in that: Including at least three groups of multi-stage gas injection valve groups; The multi-stage gas injection valve group includes a pneumatic ball valve (400), an injection pipeline (600) and a dynamic pressure stabilizing and regulating component (700). The air outlet end of the pneumatic ball valve (400) is communicated with the injection pipeline (600) and is used for quickly opening and closing according to the instruction of an external electronic controller. The dynamic pressure stabilizing and regulating component (700) is arranged inside the throat end of the injection pipeline (600) and is used for dynamically regulating gas injection; The dynamic pressure stabilizing and regulating component (700) includes a first proportional regulating vane (709) and a second proportional regulating vane (710), and the leaf surfaces of the two are in opposite directions. The number of leaves of the first proportional regulating vane (709) is more than that of the second proportional regulating vane (710). It is rotationally driven by a gear-rack structure, and its spacing is adjusted by a connecting rod structure.

2. The gas mixing high-efficiency control device for an adaptive regulation LPG generator set according to claim 1, wherein: The gear-rack structure is composed of a chute rod (707), a rack (712), a travel chute (711) and a rotating gear (714). The travel chute (711) is opened on the surface of the chute rod (707), and the rack (712) is meshed with the rotating gear (714).

3. The gas mixing high-efficiency control device for an adaptive regulation LPG generating set according to claim 1, characterized in that: The connecting rod structure is composed of a transmission rod (708) and a variable-frequency servo motor (701). The side end of the transmission rod (708) is arranged on the top surface of a travel slider (713).

4. The gas mixing and high-efficiency control device for an LPG generator set with adaptive adjustment according to claim 3, characterized in that: A pulley structure (702) is sleeved outside the output shaft of the variable-frequency servo motor (701), and a synchronous rotating shaft (704) is sleeved inside the side end of the pulley structure (702).

5. The gas mixing high-efficiency control device for an LPG generator set with adaptive adjustment according to claim 1, characterized in that: The pneumatic ball valve (400) is composed of a pneumatic driving source, a ball valve and a fine flow regulating component (800). The fine flow regulating component (800) is equally divided and arranged around the surface of the ball valve for fine flow compensation.

6. The gas mixing high-efficiency control device for an LPG generating set with adaptive adjustment according to claim 5, characterized in that: The fine flow regulating component (800) includes a regulating end (801), and rotating plate surfaces (802) are symmetrically arranged at the left and right ends of the regulating end (801).

7. The gas mixing high-efficiency control device for an adaptive regulation LPG generator set according to claim 6, characterized in that: A rotating joint shaft is arranged inside the rotating plate surface (802), and a transmission ring plate (803) is connected to the side end of the rotating joint shaft.

8. The gas mixing high-efficiency control device for an adaptive-adjusting LPG generator set according to claim 7, characterized in that: A regulating connecting piece (804) is arranged on the side wall surface of the transmission ring plate (803), a shape memory metal section (805) is arranged at the bottom of the side end of the regulating connecting piece (804), and multiple temperature control columns (806) are embedded in the shape memory metal section (805).

9. The gas mixing high-efficiency control device for an adaptive regulation LPG generator set according to claim 8, characterized in that: The side end of the shape memory metal section (805) is slidably connected with a travel track groove (807).

10. The gas mixing high-efficiency control device for an adaptive regulation LPG generating set according to claim 9, characterized in that: A single-stage controller (808) is arranged at the side end of the travel track groove (807).

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