An adaptively regulated high-efficiency gas mixing control device for LPG generator sets

Abstract

The present invention discloses an adaptively regulated LPG generator set gas mixing high-efficiency control device, which relates to the technical field of generator set operation control, and comprises a multi-stage gas injection valve group, wherein the multi-stage gas injection valve group is respectively arranged in three or more groups. Through the coordinated work of the multi-stage gas injection valve group, the dynamic pressure regulating component and the pneumatic ball valve, the gas injection can be accurately regulated according to the real-time changes of the gas composition and the engine load. The first proportional regulating vane and the second proportional regulating vane in the dynamic pressure regulating component effectively improve the stability and regulation accuracy of the gas injection, and improve the mixing uniformity of the gas and the air, thereby promoting the full combustion of the gas and improving the efficiency of the generator set. Secondly, the precise control capability of the rack and pinion structure and the connecting rod structure enables the component to quickly respond to the regulation requirements under different working conditions, thereby ensuring the stability and reliability of the gas injection.

Description

Technical Field

[0001] The present invention relates to the technical field of generator set operation control, and in particular to a self-adaptively regulated LPG generator set gas mixing high-efficiency control device. Background Art

[0002] Gas-fired generator sets using liquefied petroleum gas (LPG) as fuel have been widely used in various industries. However, the gas source pressure used by these gas-fired generator sets is relatively low, generally below 30kPa. Because of this low gas pressure requirement and its wide adaptability, these gas-fired generator sets are currently the most widely used in the market.

[0003] At present, the gas composition often changes, and the existing control method responds slowly. For example, under low gas source conditions, the traditional control mode has a narrow adaptability range (about 20%) and cannot adjust the gas and air ratio in time, affecting power generation efficiency. In addition, the fixed-section air intake duct cannot dynamically match the gas flow changes. For example, when the required air volume is reduced by 20% under low gas conditions, the traditional damper adjustment accuracy is only ±5%, and due to the influence of pipeline resistance, the actual air flow error can reach ±8%, resulting in insufficient response speed to gas composition changes. Therefore, it is necessary to propose an adaptive and high-efficiency gas mixing control device for LPG generator sets. Summary of the Invention

[0004] The present invention aims to provide an adaptive and efficient gas mixing control device for LPG generator sets to address the slow response of existing control methods mentioned in the background art. For example, under low-gas conditions, the traditional control mode has a narrow adaptability range (approximately 20%) and is unable to adjust the gas-air ratio in a timely manner, affecting power generation efficiency. Furthermore, the fixed-section air intake duct cannot dynamically adapt to changes in gas flow. For example, under low-gas conditions, when the required air volume decreases by 20%, the traditional damper adjustment accuracy is only ±5%. Furthermore, due to the influence of 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-mentioned object, the present invention provides the following technical solutions: an adaptively regulated LPG generator set gas mixing high-efficiency control device, comprising at least three groups of multi-stage gas injection valve groups;

[0006] The multi-stage gas injection valve group includes a pneumatic ball valve, an injection pipeline and a dynamic pressure regulating assembly. The gas outlet of the pneumatic ball valve is connected to the injection pipeline and is used to quickly open and close according to the instructions of the external electronic controller. The dynamic pressure regulating assembly is installed inside the throat end of the injection pipeline and is used to dynamically adjust the gas injection.

[0007] The dynamic pressure stabilization adjustment component includes a first proportional adjustment vane and a second proportional adjustment vane, the blade surfaces of which are in opposite directions. The first proportional adjustment vane has more blades than the second proportional adjustment vane. It is driven to rotate by a gear rack structure, and the spacing between them is adjusted by a connecting rod structure.

[0008] Preferably, the rack and pinion structure is composed of a slide rod, a rack, a travel slide and a rotating gear, the travel slide is provided on the surface of the slide rod, and the rack and the rotating gear are meshed.

[0009] Preferably, the connecting rod structure is composed of a transmission rod and a variable frequency servo motor, and the side end of the transmission rod is arranged on the top surface of the travel slider.

[0010] Preferably, the output shaft of the variable frequency servo motor is externally sleeved with a pulley structure, and the side end of the pulley structure is internally sleeved with a synchronous rotating shaft.

[0011] Preferably, the pneumatic ball valve is composed of a pneumatic drive source, a ball valve and a fine-tuning flow component, and the fine-tuning flow component is equally divided and arranged around the surface of the ball valve for fine flow compensation.

[0012] Preferably, the fine-tuning flow component includes an adjusting end, and rotating plates are symmetrically arranged on the left and right ends of the adjusting end.

[0013] Preferably, a swivel shaft is provided inside the swivel plate surface, and a side end of the swivel shaft is connected to a transmission ring plate.

[0014] Preferably, a regulating connector is installed on the side wall surface of the transmission ring plate, a memory metal segment is installed on the bottom of the side end of the regulating connector, and multiple groups of temperature control columns are embedded in the memory metal segment.

[0015] Preferably, the side end of the memory metal segment is slidably connected to a travel track groove.

[0016] Preferably, a single-stage controller is installed at the side end of the travel track groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, the coordinated operation of the multi-stage gas injection valve group, the dynamic pressure regulating assembly, and the pneumatic ball valve enables precise regulation of gas injection according to real-time changes in gas composition and engine load. The first and second proportional regulation vanes in the dynamic pressure regulating assembly can effectively improve the stability and regulation accuracy of gas injection and enhance the uniformity of gas-air mixing, thereby promoting full combustion of the gas and improving the efficiency of the generator set. Secondly, the precise control capabilities of the rack and pinion structure and the connecting rod structure enable the assembly to quickly respond to regulation requirements under different operating conditions, ensuring the stability and reliability of gas injection. In addition, the provision of the vortex suppression plate effectively reduces vortexes in the gas, reduces energy loss during the injection process, and further enhances the performance of the entire system. The fine-tuning flow assembly of the pneumatic ball valve can finely compensate for the gas flow, ensuring full combustion of the gas and improving the efficiency and performance of the LPG generator set. At the same time, the pressure monitoring device and flow monitoring device on the gas guide pipeline provide accurate data support for the entire control system, further enhancing the adaptive regulation capability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a self-adaptive and adjustable LPG generator set gas mixing high-efficiency control device of the present invention;

[0020] Figure 2 This is a structural schematic diagram of a single valve group in a self-adaptive and adjustable LPG generator set gas mixing high-efficiency control device of the present invention;

[0021] Figure 3 This is a schematic diagram of the installation position of the fine-tuning flow component in the adaptively regulated LPG generator set gas mixing high-efficiency control device of the present invention;

[0022] Figure 4 This is a schematic diagram of the explosion structure of a pneumatic ball valve in a self-adaptive and adjustable LPG generator set gas mixing high-efficiency control device of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a fine-tuning flow rate component in a self-adaptive and efficient control device for LPG generator set gas mixing according to the present invention;

[0024] Figure 6 This is a schematic diagram of the partial structural separation of a fine-tuning flow component in a self-adaptive and high-efficiency control device for LPG generator gas mixing according to the present invention;

[0025] Figure 7 This is a schematic diagram of the installation position structure of a dynamic voltage regulating component in a self-adaptive regulating LPG generator set gas mixing high-efficiency control device of the present invention;

[0026] Figure 8 This is a structural schematic diagram of a dynamic voltage stabilization and regulation component in a self-adaptive regulation LPG generator set gas mixing high-efficiency control device according to the present invention;

[0027] Figure 9 This is a partial structural diagram of a dynamic voltage regulating component in a self-adaptive and efficient control device for gas mixing of an LPG generator set according to the present invention;

[0028] Figure 10 The invention is a self-adaptive regulation LPG generator set gas mixing high efficiency control device Figure 9 A is an enlarged structural diagram of FIG.

[0029] Figure: 100, gas supply source; 200, gas delivery pipeline; 300, valve port; 400, pneumatic ball valve; 500, flange mounting; 600, injection pipeline; 700, dynamic pressure regulating assembly; 701, variable frequency servo motor; 702, pulley structure; 703, electromagnetic blocker mounting rod; 704, synchronous shaft; 705, up and down swing drive structure; 706, eddy current suppression plate; 707, slide rod; 708, transmission Rod; 709, first proportional adjustment vane; 710, second proportional adjustment vane; 711, travel slide; 712, rack; 713, travel slider; 714, rotating gear; 715, rotating shaft; 800, fine-tuning flow component; 801, adjustment end; 802, rotating plate surface; 803, transmission ring plate; 804, regulating connector; 805, memory metal segment; 806, temperature control column; 807, travel track groove; 808, single-stage controller. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] According to the overall content, conventional gas mixing control systems for existing LPG generator sets can achieve basic gas delivery and mixing functions. However, in complex operating conditions, these systems lack the precise sensing and dynamic adjustment mechanisms to accurately detect real-time changes in gas composition and engine load, leading to incomplete gas combustion and low generator set efficiency. Furthermore, their single adjustment structure and limited adjustment accuracy make them difficult to adapt to diverse operational requirements.

[0032] The present invention is completed in order 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 set to three or more groups. The multi-stage gas injection valve group is combined with a dynamic pressure regulating adjustment component 700 that can be dynamically adjusted according to real-time changes in gas composition and engine load, and a pneumatic ball valve 400 with a fine flow compensation function, precise control of gas injection is achieved. At the same time, the pressure monitoring device and flow monitoring device on the gas guide pipeline 200 are used to provide accurate data for the external electronic controller, further optimize the control strategy, and effectively improve the gas mixing efficiency and overall performance of the LPG generator set.

[0033] In the embodiment of the present invention, referring to Figure 1 and Figure 2 The figure shows an adaptively regulated, high-efficiency gas mixing control device for an LPG generator set, comprising a multi-stage gas injection valve group, each of which is provided with three or more groups. The multi-stage gas injection valve group is used to accurately control the flow and pressure of the gas according to the instructions of an external electronic controller. When the engine load suddenly changes, the external electronic controller can quickly control the operation of the corresponding multi-stage gas injection valve group and quickly adjust the gas injection amount.

[0034] The multi-stage gas injection valve group includes a pneumatic ball valve 400, an injection pipeline 600 and a dynamic pressure regulating component 700. The 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 the external electronic controller. The dynamic pressure regulating component 700 is installed inside the throat end of the injection pipeline 600 and is used to dynamically adjust the gas injection according to the real-time changes of the gas composition and engine load. That is, during the adjustment process, the gas composition detection sensor and the 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 operation of the dynamic pressure regulating component 700 (such as increasing the spacing or rotation speed of the first proportional adjustment vane 709 and the second proportional adjustment vane 710), or increases the opening of the pneumatic ball valve 400. When the gas When the 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 local flow channel cross-sectional area of ​​the pneumatic ball valve 400 and reduces the gas flow. Through continuous feedback and optimization, the gas injection is always in the best state, thereby improving the efficiency and stability of the generator set. At the same time, if the power 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 quickly calculates the amount of gas and pressure that need to be increased based on this information, and sends new instructions to the dynamic pressure stabilization adjustment component 700, the fine-tuning flow component 800 and the pneumatic ball valve 400, so that after receiving the instructions, they immediately increase the valve opening and increase the flow channel cross-sectional area to ensure that the pressure of the gas is stable during the injection process, thereby achieving efficient gas mixing and combustion.

[0035] In one specific solution, during operation, an external electronic controller reads the initial values ​​of each sensor (gas composition detection sensor and pressure sensor) built into the injection pipeline 600 and removes noise using an adaptive Kalman filter algorithm. It then automatically loads a preset air-fuel ratio map based on the engine model (e.g., 100kW / 200kW) and gas type (LPG / mixed air and gas). As needed, the electronic controller collects 100 sets of data per second and uses a neural network model to predict gas composition trends (e.g., a 3% decrease in propane content) and engine load fluctuations (e.g., a 15% increase in torque) over the next 500ms. Based on the predicted results and the air-fuel ratio map, the target gas flow and pressure are calculated (e.g., a 5% increase in gas flow is required, given a current air-fuel ratio of 12.5 and a target air-fuel ratio of 12.8). The dynamic pressure regulation component 700 then operates, achieving dynamic decoupling of gas flow and pressure, improving overall regulation accuracy and response speed by 3-5 times under complex operating conditions.

[0036] In some embodiments, according to Figure 7-10 As shown, the dynamic voltage regulating component 700 includes a first proportional regulating vane 709 and a second proportional regulating vane 710, the blades of which are in opposite directions. The blades 709 are arranged along the curvature of the inner curve of the injection pipe 600, so that the gas can be continuously and evenly adjusted when passing through the two blades. At the same time, the blade surfaces of the two are opposite, that is, the blade surface of the first proportional adjustment blade 709 is inclined in the clockwise direction, and the blade surface of the second proportional adjustment blade 710 is inclined in the counterclockwise direction, so that the gas will produce a special flow effect when passing through the blades, which helps to break the vortex in the gas and improve the mixing uniformity of the gas. The number of blades of the first proportional adjustment blade 709 is more than that of the second proportional adjustment blade 710, and they rotate through a gear rack structure. The blade surface angle of the first proportional adjustment blade 709 is 30°, and the blade surface angle of the second proportional adjustment blade 710 is 60°. The first proportional adjustment blade 709 is a contraction-type blade (30° blade surface angle) that accelerates the gas through the throat and uses the Venturi effect to reduce the static pressure. The second proportional adjustment vane 710 is an expansion-type vane (60° blade angle) that restores pressure through the diffusion section in accordance with the Bernoulli equation, so that the counter-rotating blades can generate shear flow and break up large-scale vortices. The spacing between the two vanes is adjusted by a connecting rod structure. Through different blade numbers and blade angles, the two vanes have different effects on the gas during rotation. For example, the first proportional adjustment vane 709 has a large number of blades and a small blade angle, which can perform more precise regulation of the gas, change the flow direction and speed of the gas, increase the turbulence of the gas, and thus promote the mixing of the gas and air. The second proportional adjustment vane 710 has a small number of blades and a large blade angle, which is used to stabilize the gas pressure and further organize the gas flow field, so that the gas adjusted by the first proportional adjustment vane 709 can enter the subsequent injection pipeline 600 with stable pressure and uniform flow state.

[0037] The rack and pinion structure is composed of a slide rod 707, a rack 712, a travel slide 711 and a rotating gear 714. The travel slide 711 is opened on the surface of the slide rod 707, the rack 712 is arranged on the inner side of the slide rod 707, and a travel slider 713 is arranged on the outside of the rotating gear 714. The rack 712 and the rotating gear 714 are meshed. The center end of the rotating gear 714 is connected to a rotating shaft 715. The bottom end of the rotating shaft 715 is connected to the first proportional adjustment vane 709 and the second proportional adjustment vane 710 respectively, so that when the travel slider 713 makes a linear motion in the travel slide 711, it can bring The rotating gear 714 and the rack 712 form a rotating operation, and an electromagnetic blocker is installed at the side end of the rotating gear 714, which is used to adjust the rotation of the first proportional adjustment vane 709 and the second proportional adjustment vane 710. When the rotating gear 714 rotates under the drive of 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 motion speed and displacement of the rack 712, the rotation speed and angle of the vanes can be accurately adjusted, thereby meeting the adjustment requirements of gas injection under different working conditions.

[0038] 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 installed on the top surface of the travel slider 713. The transmission rod 708 is set into two symmetrical groups and installed in sequence. The output end of the variable frequency servo motor 701 is connected to one side of the two symmetrical transmission rods 708. Through the symmetrical and sequential installation of the transmission rods 708, the first proportional adjustment blade 709 and the second proportional adjustment blade 710 are subjected to uniform force, avoiding eccentricity or instability. The variable frequency servo motor 701 has high-precision speed control and position control. The control capability can accurately drive the transmission rod 708 to move by controlling the output speed and direction. When the transmission rod 708 moves, it will drive the travel slider 713 to move on the slide 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 gear rack structure to adjust the spacing between the two vanes. Adjusting the spacing 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 of the gas to adapt to different gas compositions and engine load changes.

[0039] The output shaft of the variable frequency servo motor 701 is sleeved on the outside with a pulley structure 702, which plays the role of transmitting power, and smoothly transmits the power of the variable frequency servo motor 701 to the synchronous shaft 704. The side end of the pulley structure 702 is sleeved on the inside with a synchronous shaft 704, and the outer circumference of the synchronous shaft 704 is provided with an electromagnetic blocker mounting rod 703. The electromagnetic blocker mounting rod 703 is mainly composed of an electromagnetic blocker 2 and a mounting rod. The electromagnetic blocker 2 can cut off the rotation of the synchronous shaft 704 and the pulley structure 702 according to the control signal of the system, and accurately control the rotation of the synchronous shaft 704. The side end of the synchronous shaft 704 is provided with an up and down swinging drive structure 705, and the side end of the up and down swinging drive structure 705 is connected with an eddy current suppression plate 706, and the outer wall surface of the eddy current suppression plate 706 is opened There is a spiral guide groove, and the up and down swinging driving structure 705 can drive the vortex suppression plate 706 to swing up and down. The outer wall surface of the vortex suppression plate 706 is provided with a spiral guide groove. When the gas flows in the injection pipe 600, the swing of the vortex suppression plate 706 and the action of the spiral guide groove can effectively suppress the vortex in the gas, making the flow of the gas more stable and uniform, which helps to improve the injection effect of the gas, reduce the energy loss of the gas during the injection process, and further improve the efficiency of gas mixing. The side end of the electromagnetic blocker mounting rod 703 is provided with an arc wall plate, which is installed on the outer wall surface of the injection pipe 600. The arc wall plate can support the electromagnetic blocker mounting rod 703 and related components, and can also play a certain reinforcement role on the outer wall of the injection pipe 600, thereby improving the structural stability of the entire component.

[0040] In a specific solution, when the external electronic controller calculates that the gas injection needs to be adjusted based on the data from the gas composition detection sensor and the pressure sensor, as well as information such as the engine model and the gas type, it will send a control signal to the variable frequency servo motor 701. The variable frequency servo motor 701 adjusts the output speed and direction according to the control signal, and transmits power to the connecting rod structure and the gear rack structure through the pulley structure 702 and the synchronous rotating shaft 704.

[0041] The connecting rod structure adjusts the distance between the first proportional adjustment vane 709 and the second proportional adjustment vane 710 through the transmission rod 708 and the stroke slider 713 to adapt to different gas flow and pressure requirements. At the same time, the gear rack structure drives the first proportional adjustment vane 709 and the second proportional adjustment vane 710 to rotate through the meshing movement of the rack 712 and the rotating gear 714, thereby changing the flow direction and speed of the gas and realizing dynamic adjustment of the gas injection.

[0042] The up and down swinging drive structure 705 drives the vortex suppression plate 706 to swing, and uses the spiral guide groove to suppress the vortex in the gas to ensure the stability and uniformity of the gas during the injection process. The electromagnetic blocker on the electromagnetic blocker mounting rod 703 can accurately 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.

[0043] Through the synergistic effect of the first proportional adjustment vane 709 and the second proportional adjustment vane 710, the overall system can achieve fine adjustment of gas injection, improve 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 capability of the rack and pinion structure and the connecting rod structure enables 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 vortex suppression plate 706 effectively reduces the vortex in the gas, reduces the energy loss of the gas during the injection process, and further improves the performance of the entire system.

[0044] During the above adjustment process, the gas composition detection sensor and pressure sensor will continuously monitor the actual state of the gas, such as the actual flow rate and pressure. 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 50m³ / h and the actual monitored flow rate is 48m³ / h, there is a deviation of 2m³ / h.

[0045] Based on 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 vane 709 and the second proportional adjustment vane 710, or increase the opening 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, so that the component can continuously self-adjust to ensure that the gas injection is always in the best state.

[0046] In some embodiments, according to Figure 3-Figure 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 components 800 are equally divided and arranged around the surface of the ball valve for fine flow compensation. The pneumatic drive source adopts a double-acting cylinder (working pressure 0.4-0.7MPa) and cooperates with the electromagnetic reversing valve to realize 0-90° rapid opening and closing of the ball valve. The valve body flow channel of the ball valve adopts a streamlined design (flow resistance coefficient Cv=50-200, adjusted according to the caliber) to reduce the gas flow resistance, and the fine-tuning flow components 800 are evenly arranged in 4-8 groups around the circumference of the ball valve (adjusted according to the caliber of the ball valve). Each group of components independently responds to the temperature / flow signal to achieve fine compensation of ±5% of the rated flow.

[0047] The fine-tuning flow component 800 includes an adjusting end 801, and a rotating plate surface 802 is symmetrically arranged on the left and right ends of the adjusting end 801. A rotating joint shaft is arranged inside the rotating plate surface 802, and the side end of the rotating joint shaft is connected to a transmission ring plate 803. When the adjusting end 801 rotates, the effective cross-sectional area of ​​the ball valve flow channel can be changed to achieve micro-flow adjustment. The symmetrically arranged rotating plate surface 802 is rigidly connected to the adjusting end 801 through the rotating joint shaft to form a double-point rotation mechanism.

[0048] A control connector 804 is installed on the side wall surface of the transmission ring plate 803. The transmission ring plate 803 converts the linear displacement of the memory metal segment 805 into rotational motion of the adjustment end 801. One end of the control connector 804 is hinged to the transmission ring plate 803 and the other end is rigidly connected to the memory metal segment 805. A memory metal segment 805 is installed at the bottom of the side end of the control connector 804. The memory metal segment 805 is made of nickel-titanium alloy (NiTi) and has an initial arc shape. When the temperature changes, the nickel-titanium alloy molecular chains reorganize, driving the memory metal segment 805 to bend into a preset shape according to the trajectory of the travel trajectory groove 807. The memory metal segment 805 is embedded with multiple sets of temperature control columns 806. The temperature control columns 806 have built-in thermistors (accuracy of ±0.5°C) and shape memory alloy trigger elements. When the gas temperature changes by more than a set threshold (e.g., ±3°C), the thermistors transmit a signal to the single-stage controller 808, which simultaneously triggers the memory metal segment 805 to begin deformation.

[0049] The side end of the memory metal segment 805 is slidingly connected to a stroke track groove 807, which is installed on the surface of the ball valve. A single-stage controller 808 is installed on the side end of the stroke track groove 807. The single-stage controller 808 is connected to multiple groups of temperature control columns 806 through lines. After receiving the temperature signal of the temperature control column 806, the single-stage controller 808 drives the heating / cooling element (built-in resistance wire, power 5-15W) of the memory metal segment 805 through a PWM signal to accelerate / delay the deformation process and achieve precise control of dynamic compensation.

[0050] In a specific scenario, when the gas temperature increases (e.g., from 25°C to 35°C):

[0051] The temperature control column 806 detects the temperature change, and 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 increase in temperature). The single-stage controller 808 energizes the resistance wire of the memory metal segment 805, triggering the nickel-titanium alloy to change from the "low-temperature straight state" to the "high-temperature bent state", causing the memory metal segment 805 to bend toward the center of the ball valve along the stroke trajectory groove 807. By adjusting the connecting piece 804, the transmission ring plate 803 is pulled to rotate, and the transmission ring plate 803 drives the rotating plate surface 802 and the regulating end 801 to rotate synchronously by 5°, reducing the local flow channel cross-sectional area of ​​the ball valve by 3%, offsetting the flow deviation caused by temperature (the measured flow rate drops from 50m³ / h to 49m³ / h, close to the target value of 49m³ / h). At this time, the pneumatic ball valve 400 is in the closed state.

[0052] When the external electronic controller detects that the actual gas flow rate is lower than the target value (for example, the air-fuel ratio is too lean), it 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 memory metal segment 805 to deform in the opposite direction (from the bent state to the straight state), and pushes the regulating end 801 to rotate 3° in the direction of increasing the flow channel. Multiple groups of fine-tuning flow components 800 work together to increase the flow channel cross-sectional area by 1.8%, thereby increasing the actual flow rate from 48.5m³ / h to 50m³ / h, completing active compensation.

[0053] When the gas temperature exceeds 80°C (the upper limit of the effective operating temperature of nickel-titanium alloy), the single-stage controller 808 triggers the "over-temperature protection mode", cuts off the power supply of the memory metal segment 805, prevents the alloy from overheating and failure, and sends an alarm signal to the electronic controller. The electronic controller switches to the main valve opening adjustment of the pneumatic ball valve 400 (by increasing the main valve opening by 1%) to maintain flow stability, ensure overall safe operation, and avoid engine failure or other safety accidents due to unstable gas flow.

[0054] The overall system effectively avoids the signal delay and parameter drift problems of traditional electronic control compensation, and is particularly suitable for industrial scenarios with complex gas composition and large temperature fluctuations, significantly improving the dynamic adaptability and control accuracy of LPG generator sets.

[0055] In some embodiments, according to Figure 1 and Figure 2 As shown, the side end of the injection pipeline 600 and the output end of the pneumatic ball valve 400 are connected with a flange mounting member 500. The injection pipeline 600 serves as a downstream channel for gas transmission. Its side end 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, corrosion-resistant metal material, such as stainless steel or aluminum alloy, to ensure the sealing and stability of the connection.

[0056] A valve port 300 is provided on the other side of the pneumatic ball valve 400. The valve port 300 serves as the entrance for the 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 adopts a smooth surface treatment to reduce the resistance to the flow of gas. At the same time, its diameter is accurately calculated and designed according to the flow demand and pressure requirements of the system. The side end of the valve port 300 is connected to the gas guide pipeline 200. The gas guide pipeline 200 adopts a seamless steel pipe or a high-strength plastic pipe with good pressure resistance and corrosion resistance. The side end of the gas guide pipeline 200 is connected to the gas supply source 100. The gas supply source 100 is usually a large LPG storage tank or a gas pipeline network, which provides a stable LPG gas supply for the multi-stage gas injection valve group. A pressure monitoring device and a flow monitoring device are also provided on the gas guide pipeline 200. The pressure monitoring device usually adopts a high-precision pressure sensor, such as a strain gauge pressure sensor, and the flow monitoring device is a turbine flow sensor, which are respectively used for The pressure and flow of the gas before entering the pneumatic ball valve 400 are monitored 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 pressure regulating assembly 700 based on the data. The pressure monitoring device transmits the monitored pressure data to the external electronic controller via a cable or wireless communication. The electronic controller adjusts the opening of the pneumatic ball valve 400 according to a preset pressure threshold and control algorithm to maintain stable gas pressure. The flow monitoring device also transmits the monitored flow data to the external electronic controller. The external electronic controller accurately controls the pneumatic ball valve 400 and the dynamic pressure regulating assembly 700 based on the engine operating conditions and gas demand, combined with the pressure data and other relevant parameters. For example, when the engine load increases, the electronic controller appropriately increases the opening of the pneumatic ball valve 400 and adjusts the parameters of the dynamic pressure regulating assembly 700 based on the data feedback from the flow monitoring device to increase the gas supply and ensure normal operation of the engine.

[0057] 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 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 pressure stabilization 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 pressure of the gas. Conversely, when the pressure is too low, the electronic controller will increase the opening of the pneumatic ball valve 400 and adjust the parameters of the dynamic pressure stabilization adjustment component 700 accordingly to increase the pressure of the gas.

[0058] For flow control, the electronic controller coordinates the control of the pneumatic ball valve 400 and the dynamic pressure regulating component 700 according to the engine's operating conditions and gas demand, combined with the data fed back by the flow monitoring device. During the engine startup phase, the external electronic controller will quickly adjust the opening of the pneumatic ball valve 400 and the fine-tuning flow component 800 and the parameters of the dynamic pressure regulating component 700 according to the preset startup program to provide sufficient gas volume to ensure smooth engine startup. During normal engine operation, the external electronic controller will monitor the flow data in real time and dynamically adjust the gas supply according to the engine load changes to achieve the best air-fuel ratio and combustion efficiency.

[0059] The wiring diagram of the gas composition detection sensor, pressure sensor, turbine flow sensor, strain gauge pressure sensor and single-stage controller 808 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring layout 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.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adaptively regulated LPG generator set gas mixing high-efficiency control device, characterized by: It includes at least three groups of multi-stage gas injection valve groups; The multi-stage gas injection valve assembly comprises a pneumatic ball valve (400), an injection pipeline (600) and a dynamic pressure regulating assembly (700); the gas outlet end of the pneumatic ball valve (400) is connected to the injection pipeline (600) and is used for rapid opening and closing according to instructions from an external electronic controller; the dynamic pressure regulating assembly (700) is installed inside the throat end of the injection pipeline (600) and is used for dynamically regulating gas injection; The dynamic pressure regulating component (700) includes a first proportional regulating vane (709) and a second proportional regulating vane (710), the vanes of which are in opposite directions, the number of the first proportional regulating vane (709) is greater than that of the second proportional regulating vane (710), the first proportional regulating vane (709) and the second proportional regulating vane (710) are both rotationally driven by a gear rack structure, and the spacing between the first proportional regulating vane (709) and the second proportional regulating vane (710) is adjusted by a connecting rod structure; The rack and pinion structure is composed of a slide rod (707), a rack (712), a travel slide (711) and a rotating gear (714); the travel slide (711) is provided on the surface of the slide rod (707); the rack (712) is provided on the inner side of the slide rod (707); a travel slider (713) is provided on the outside of the rotating gear (714); the rack (712) and the rotating gear (714) are meshed with each other; and the central end of the rotating gear (714) is connected to a rotating shaft (715); 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) and the top surface of the travel slider (713) are arranged relative to each other, the transmission rods (708) are arranged in two symmetrical groups and are installed in sequence, the output end of the variable frequency servo motor (701) is connected to one side of the two groups of symmetrical transmission rods (708), and the symmetrical and sequentially installed transmission rods (708) make the forces acting on the first proportional adjustment vane (709) and the second proportional adjustment vane (710) uniform.

2. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 1 is characterized in that: The output shaft of the variable frequency servo motor (701) is sleeved with a pulley structure (702) on the outside, and a synchronous rotating shaft (704) is sleeved on the side end of the pulley structure (702).

3. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 1 is characterized in that: The pneumatic ball valve (400) is composed 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.

4. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 3 is characterized in that: The fine-tuning flow component (800) includes a regulating end (801), Rotating plate surfaces (802) are symmetrically arranged at the left and right ends of the joint end (801).

5. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 4 is characterized in that: A swivel shaft is provided inside the swivel plate surface (802), and a side end of the swivel shaft is connected to a transmission ring plate (803).

6. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 5 is characterized in that: A regulating connector (804) is installed on the side wall surface of the transmission ring plate (803), a memory metal segment (805) is installed on the bottom of the side end of the regulating connector (804), and multiple groups of temperature control columns (806) are embedded in the memory metal segment (805).

7. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 6 is characterized in that: The side end of the memory metal segment (805) is slidably connected to a travel track groove (807).

8. The adaptively regulated LPG generator set gas mixing high-efficiency control device according to claim 7 is characterized in that: A single-stage controller (808) is installed at the side end of the travel track groove (807).

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