Automatic feed regulating method for acetylene generator

Abstract

The present application belongs to the technical field of calcium carbide method PVC production, and in particular relates to an automatic feeding adjustment method for an acetylene generator, which uses an override control system to perform override control on the feeding amount of a vibrating feeder, that is, through a liquid level median value preferred + pressure priority interlocking logic, single parameter abnormality instant response is realized, double parameter abnormality priority treatment is realized, and then rapid automatic switching of the opening of the vibrating feeder is realized, while achieving disturbance-free transition, and realizing automatic adjustment of tracking input variables. Compared with the prior art, the present application can adapt to multiple parameter coupling working conditions, has the advantages of rapid response, high control precision, high safety, and the like, and is suitable for popularization and application.

Description

Technical Field

[0001] This invention belongs to the field of calcium carbide PVC production technology, specifically, it relates to an automatic feeding adjustment method for an acetylene generator. Background Technology

[0002] In the industrial production process of PVC using the calcium carbide method, the acetylene generator is the core and critical equipment for producing acetylene gas. The feeding speed of the calcium carbide feeder directly determines the reaction load, production stability, production efficiency, and production safety of the acetylene generator, and is a core control parameter of the entire acetylene production line. Currently, the calcium carbide feeding process of the generator in domestic calcium carbide-based PVC production enterprises generally still uses the traditional manual adjustment mode, and has not yet achieved automated and precise closed-loop control, which is a common technical shortcoming in the industry.

[0003] The existing manual adjustment production mode has many inherent drawbacks. On the one hand, operators need to be on duty for a long time, manually observe multiple production parameters, and frequently adjust the operating parameters of the feeding equipment. The high frequency of manual intervention and the strong repetitiveness of operations greatly increase the labor intensity of front-line operators, resulting in high labor costs and limited production efficiency. On the other hand, manual adjustment is subject to strong subjectivity, slow response, and unstable adjustment accuracy. It cannot accurately match the calcium carbide feed rate according to the real-time fluctuations of production conditions, which can easily cause uneven production load of the generator, resulting in situations where the instantaneous load is too high, too low, or fluctuates frequently. This seriously restricts the rated production capacity of the acetylene generator and reduces the continuous and stable production level of the entire PVC production line.

[0004] The core reasons for the lagging development of automated control technology for the feed rate of acetylene generators and the industry's long-term reliance on manual adjustment mainly include two key factors: the complexity of operating conditions and the high risk of production. First, the feed rate of an acetylene generator is not determined by a single parameter, but is influenced by the coupling of multiple operating parameters. Key influencing parameters include the internal pressure of the acetylene generator, the reaction temperature of the acetylene generator, and the storage height of the acetylene gas holder. These multiple parameters are dynamically coupled and interfere with each other, and the highly random nature of operating condition changes significantly increases the difficulty of automatic control algorithm design and parameter adaptation. Second, acetylene gas is a flammable and explosive high-risk medium. The reaction process of producing acetylene from calcium carbide involves high temperature, high pressure, and the risk of flammability and explosion, placing extremely high demands on the stability, safety, and fault tolerance of the control system. The industry's generally conservative production philosophy has led to a long-term lack of automated control technology for the feed rate of acetylene generators, resulting in a technological vacuum and neglect. Manual adjustment has gradually become an ingrained production habit in the industry, and a mature and reliable automated control solution has always been lacking.

[0005] Currently, the few existing feeding speed optimization control solutions in the industry mainly adopt the traditional three-impulse uniform control strategy. Its core control logic is average value adjustment, i.e., the setpoint SV = (A + B + C) / 3, which regulates the feeding speed by averaging three core operating parameters. However, this control algorithm has a fundamental technical flaw: it cannot adapt to the complex and variable production conditions of acetylene generators. In actual production, when a single parameter such as acetylene generator pressure or acetylene tank level experiences abnormal fluctuations or potential malfunctions, the normally stable temperature parameter dilutes and cancels out the abnormal signal. This prevents the control system from accurately capturing abnormal changes in a single parameter and makes it difficult to quickly identify production faults and operating condition fluctuations. Ultimately, this results in severe system lag and insufficient control precision, failing to achieve real-time and accurate feeding speed adaptation. It not only fails to address the drawbacks of manual adjustment but may also exacerbate acetylene generator operating condition fluctuations due to untimely or inaccurate adjustments, posing certain production safety hazards and failing to meet the demands of modern, intelligent, and safe PVC production.

[0006] In summary, in the current calcium carbide-based PVC production field, the calcium carbide feeding process of acetylene generators suffers from high reliance on manual labor, high labor intensity, uneven production load, and low equipment capacity utilization. Furthermore, existing traditional three-impulse control schemes have poor adjustment accuracy, slow response, and weak fault identification capabilities. The industry urgently needs an automatic adjustment and control method for acetylene generator feeding speed that is adaptable to multi-parameter coupled working conditions, has rapid response, high control accuracy, and strong safety, in order to solve many of the pain points of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to propose an automatic feeding adjustment method for acetylene generators, in order to solve the technical problems in the current calcium carbide PVC production field, such as high reliance on manual labor, high labor intensity, uneven production load, low equipment capacity utilization, poor adjustment accuracy, slow response, and weak fault identification capability of existing traditional three-impulse control schemes.

[0008] To achieve the above objectives, the present invention provides the following technical solution: An automatic feeding regulation method for an acetylene generator employs an override control system to control the feeding rate of a vibrating feeder. This involves using a liquid level median value optimization + pressure priority interlocking logic to achieve immediate response to single-parameter anomalies and priority handling of dual-parameter anomalies. This allows for rapid and automatic switching of the vibrating feeder opening while achieving a smooth transition, thus enabling automatic adjustment based on tracked input variables. The specific control process includes the following steps: S1, Pressure Linkage Control: When the pressure of the acetylene generator exceeds the upper limit threshold, the overdrive control system determines that the pressure is too high and outputs a command to automatically reduce the opening of the vibrating feeder, thereby reducing the amount of calcium carbide fed in, reducing the reaction intensity, and preventing overpressure. When the acetylene generator pressure is less than or equal to the upper threshold and greater than or equal to the lower threshold, the Chaochi control system enters the automatic adjustment mode and dynamically adjusts the opening of the vibrating feeder according to the pressure change trend to maintain process stability. When the pressure of the acetylene generator is lower than the lower threshold, the output command will automatically increase the opening of the vibrating feeder to increase the calcium carbide feed rate and improve the reaction efficiency. S2, Liquid Level Linkage Control: When the three liquid level values ​​of the three monitoring points (median, high, and low liquid levels) of the acetylene gas holder change in real time, the Chaochi control system selects the median liquid level value among the three liquid level values ​​as the setpoint of the vibrating feeder through the selector to automatically adjust and maintain the stability of the liquid level in the acetylene gas holder. When the acetylene tank level triggers a high level alarm or a low level alarm, the Chaochi control system prioritizes responding to the alarm signal and automatically adjusts the opening of the vibrating feeder to quickly restore the level to a safe range. Priority logic is set between liquid level linkage control and pressure linkage control: when the pressure of the acetylene generator and the liquid level of the acetylene tank are abnormal at the same time, the overdrive control system prioritizes the pressure alarm to ensure production safety. Preferably, in step S1, the upper limit threshold is 10 kPa and the lower limit threshold is 8 kPa.

[0009] Preferably, in steps S1 and S2, the output of the overdrive control system is subjected to amplitude limiting processing to ensure that the opening of the vibrating feeder is within a safe range, and to avoid the impact caused by the severe fluctuations in the stable operation of the acetylene generator.

[0010] Preferably, the amplitude limiting process includes amplitude hard limiting and rate of change ramp limiting; amplitude hard limiting is used to limit the upper and lower limits of the opening of the vibrating feeder, so that the opening is within a safe working range; rate of change ramp limiting limits the maximum change amplitude of the control output in a single cycle, suppresses sudden changes in the opening of the vibrating feeder, and avoids the impact of violent fluctuations in feed on the stable operation of the acetylene generator.

[0011] Preferably, in step S2, the intermediate liquid level value after screening is used as the core to construct a dynamic closed-loop tracking between the vibrating feeder and the liquid level height of the acetylene tank, so as to realize the adaptive adjustment of the feeding amount with the change of the liquid level of the acetylene tank: when the liquid level is low, the opening of the vibrating feeder is automatically increased; when the liquid level is high, the opening of the vibrating feeder is automatically decreased or feeding is suspended, so as to accurately match the supply and demand balance of acetylene generated materials and avoid the risk of overpressure and cavitation in the acetylene tank.

[0012] Preferably, this application further includes the following steps: S3, Interlocking and Protection Control Overpressure Interlock: When the pressure of the acetylene generator exceeds the safety threshold, the Chaochi control system immediately triggers the emergency interlock, shuts down the vibrating feeder, and starts the acetylene generator cooling system to prevent explosion or equipment damage. Liquid level interlock: When the acetylene tank liquid level reaches the high-high level, the Chaochi control system automatically shuts off the vibrating feeder and triggers an audible and visual alarm to notify the operator to intervene. Fault Diagnosis: The Chaochi control system monitors the status of each detection unit and actuator in real time. Once it detects a fault in any pressure, temperature, or level sensor or an abnormal jamming of the actuator, it will immediately sound an alarm and switch to a safety mode to avoid loss of control.

[0013] Through interlocking and protection control, if an abnormality is triggered under any condition, the Chaochi control system can directly determine the operational risk and force the vibrating feeder to stop, thus eliminating feeding operations under abnormal conditions from the source.

[0014] Preferably, the standard range of the acetylene tank liquid level is 40%~60%, with high liquid level >60% and low liquid level <40%; the safe opening range of the vibrating feeder is 20%~60%.

[0015] Preferably, in step S2, when the three level monitoring points of the acetylene tank experience signal loss, over-range, or excessive deviation, the Chaochi control system automatically triggers a fault-tolerant strategy: it prioritizes using the level data from the normal level monitoring points; if all are abnormal, it immediately stops feeding and issues a fault alarm to avoid the acetylene tank going out of control due to signal distortion; at the same time, it performs real-time verification of the temperature, pressure, and level sensor signals in the interlock, and directly triggers the interlock when the signal is abnormal, thereby improving the anti-interference and fault-tolerant capabilities of the Chaochi control system.

[0016] The working principle of this invention is to achieve precise and rapid control of the process through the linkage of pressure and liquid level. In the event of abnormal pressure or liquid level, the system can automatically take measures to effectively avoid safety accidents such as acetylene gas leakage and generator overpressure, thus improving the inherent safety level of the production process. By selectively using the intermediate value of multiple liquid levels, it overcomes the limitations of traditional single-liquid-point control and innovatively introduces a filtering logic for the intermediate values ​​of three liquid levels at different heights within the acetylene gas holder. The control program of the override control system automatically compares the three liquid level signals and extracts the intermediate value as the core control parameter for the gas holder height. This avoids control deviations caused by single-point liquid level failures (such as sensor inaccuracy or signal fluctuations) and solves the problem of control benchmark confusion when data from multiple liquid levels is inconsistent, thereby improving the stability and reliability of gas holder height tracking. Next, using the selected intermediate liquid level as the core, a dynamic closed-loop tracking system is constructed between the vibrating feeder and the liquid level height of the acetylene tank. This enables adaptive adjustment of the feeding amount as the liquid level of the acetylene tank changes: the feeding opening is automatically increased when the liquid level is low, and the feeding is automatically reduced or suspended when the liquid level is high. This accurately matches the supply and demand balance of acetylene-generated materials, avoiding risks such as overpressure and cavitation in the acetylene tank.

[0017] Compared with the prior art, the invention has the following beneficial effects: 1. Improved the automation level of acetylene generator feeding control: By linking the vibrating feeder with key process parameters such as generator pressure and acetylene tank level, the feeding rate can be automatically adjusted, replacing manual operation and reducing labor intensity and operational error rate.

[0018] 2. Enhanced safety in the acetylene production process: Through precise automatic control, the operating conditions of the acetylene generator are stabilized, avoiding safety hazards such as acetylene gas leakage and overpressure caused by improper operation, thus improving the safety of the acetylene production process.

[0019] 3. The process control process has been optimized: Based on the changes in generator pressure and acetylene tank level, the feeder adjustment command is automatically output to achieve stable and efficient operation of the process.

[0020] In summary, this invention is adaptable to multi-parameter coupled operating conditions and has advantages such as rapid response, high control accuracy, and strong safety, making it suitable for widespread application. Attached Figure Description

[0021] The invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a process flow diagram of the oversag control system of the present invention in the embodiment. Detailed Implementation

[0022] The invention will now be clearly described in conjunction with the accompanying drawings and specific embodiments. This description is merely for illustrative purposes and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the invention.

[0023] like Figure 1 As shown, the process flow of the over-relaxation control system (i.e., selective control system) of this application is as follows: the crushed and qualified calcium carbide is transported to the small feeding hopper 1. After replacing the C2H2 in the first storage hopper 2 with N2, the upper valve of the first storage hopper is opened, and calcium carbide is allowed to enter the first storage hopper 2 while N2 continues to flow. Then the upper valve is closed, and after the N2 is turned off and the air is vented, the lower valve is opened, and calcium carbide is put from the first storage hopper into the second storage hopper 3. The calcium carbide in the second storage hopper is continuously fed into the acetylene generator 5 by the electromagnetic vibrating feeder 4. The calcium carbide reacts with the water in the acetylene generator to generate acetylene gas, which escapes from the top of the acetylene generator and then enters the positive water seal 7 through the slurry separator 6. The gas coming out of the positive water seal enters the purification system 8 (the purification system adopts the existing technology in this field, such as the purification tower, the specific structure and working principle of which will not be described here). The hydrolysis of calcium carbide releases a large amount of heat, therefore water needs to be continuously added to the acetylene generator. After decomposition, the dilute calcium carbide slurry is discharged through the overflow pipe, while the more concentrated slurry at the bottom of the acetylene generator is periodically discharged through the slag discharge valve 11. To maintain stable pressure in the acetylene generator, a backflow preventer 9 and a safety water seal 10 are installed. When the pressure in the acetylene generator decreases, acetylene gas enters the acetylene generator from the acetylene gas holder through the backflow preventer to maintain positive pressure. Conversely, if the pressure in the acetylene generator is too high, the safety water seal releases the pressure.

[0024] The oversag control system of this application mainly consists of the following core components: Electromagnetic vibrating feeder: As an actuator, it is responsible for quantitatively adding crushed calcium carbide blocks into a wet acetylene generator. The feeding rate can be adjusted by regulating the amplitude.

[0025] Pressure detection unit: Installed on top of the acetylene generator, it monitors the process pressure in real time and transmits the signal to the control unit.

[0026] Liquid level detection unit: Installed on the side wall of the acetylene gas holder, it monitors the liquid level inside the equipment in real time, including three monitoring points: median liquid level, high liquid level alarm, and low liquid level alarm.

[0027] The standard range for the acetylene gas tank level is 40%~60%, with high level >60% and low level <40%; the safe opening range for the vibrating feeder is 20%~60%; and the standard pressure range for the acetylene generator is 8kPa~10kPa, with overpressure >10kPa and low pressure <8kPa.

[0028] Based on the above process flow and threshold range, this application proposes an automatic feeding adjustment method for an acetylene generator. This method employs an override control system to control the feeding rate of the vibrating feeder. Specifically, it uses a liquid level median value optimization + pressure priority interlocking logic to achieve immediate response to single-parameter anomalies and priority handling of dual-parameter anomalies. This allows for rapid and automatic switching of the vibrating feeder opening while achieving a smooth transition, thus enabling automatic adjustment based on tracking input variables. The specific control process includes the following steps: S1, Pressure Linkage Control: When the pressure of the acetylene generator exceeds 10 kPa, the overdrive control system determines that the pressure is too high and outputs a command to automatically reduce the opening of the vibrating feeder, thereby reducing the amount of calcium carbide fed in, reducing the reaction intensity, and preventing overpressure. When the acetylene generator pressure is less than or equal to 10 kPa and greater than or equal to 8 kPa, the Chaochi control system enters the automatic adjustment mode and dynamically adjusts the opening of the vibrating feeder according to the pressure change trend to maintain process stability. When the pressure of the acetylene generator is less than 8 kPa, the output command will automatically increase the opening of the vibrating feeder to increase the calcium carbide feed rate and improve the reaction efficiency. S2, Liquid Level Linkage Control: When the three liquid level values ​​of the three monitoring points (median, high, and low liquid levels) of the acetylene gas holder change in real time, the Chaochi control system selects the median liquid level value among the three liquid level values ​​as the setpoint of the vibrating feeder through the selector to automatically adjust and maintain the stability of the liquid level in the acetylene gas holder. When the acetylene tank level triggers a high level alarm or a low level alarm, the Chaochi control system prioritizes responding to the alarm signal and automatically adjusts the opening of the vibrating feeder to quickly restore the level to a safe range. Priority logic is set between liquid level linkage control and pressure linkage control: when the pressure of the acetylene generator and the liquid level of the acetylene tank are abnormal at the same time, the overdrive control system prioritizes the pressure alarm to ensure production safety. S3, Interlocking and Protection Control Overpressure Interlock: When the pressure of the acetylene generator exceeds the safety threshold, the Chaochi control system immediately triggers the emergency interlock, shuts down the vibrating feeder, and starts the acetylene generator cooling system to prevent explosion or equipment damage. Liquid level interlock: When the acetylene tank liquid level reaches the high-high level, the Chaochi control system automatically shuts off the vibrating feeder and triggers an audible and visual alarm to notify the operator to intervene. Fault Diagnosis: The Chaochi control system monitors the status of each detection unit and actuator in real time. Once a fault is detected in any pressure, temperature, or level sensor or an actuator jams abnormally, an alarm is immediately triggered and the system switches to a safety mode to prevent loss of control.

[0029] Through interlocking and protection control, if an abnormality is triggered under any condition, the Chaochi control system can directly determine the operational risk and force the vibrating feeder to stop, thus eliminating feeding operations under abnormal conditions from the source.

[0030] In steps S1 and S2, the output of the overdrive control system is limited to ensure that the opening of the vibrating feeder is within a safe range, thus avoiding severe fluctuations that could impact the stable operation of the acetylene generator.

[0031] The amplitude limiting process includes amplitude hard limiting and rate of change ramp limiting; amplitude hard limiting is used to limit the upper and lower limits of the opening of the vibrating feeder, so that the opening is within a safe working range; rate of change ramp limiting limits the maximum change amplitude of the control output in a single cycle, suppresses sudden changes in the opening of the vibrating feeder, and avoids the impact of violent fluctuations in feed on the stable operation of the acetylene generator.

[0032] In step S2, using the selected intermediate liquid level as the core, a dynamic closed-loop tracking system is constructed to monitor the liquid level of the vibrating feeder and the acetylene tank. This enables adaptive adjustment of the feed rate based on changes in the acetylene tank liquid level: automatically increasing the opening of the vibrating feeder when the liquid level is low, and automatically decreasing the opening or pausing feeding when the liquid level is high, precisely matching the supply and demand balance of acetylene production and avoiding the risks of overpressure and cavitation in the acetylene tank. When the three liquid level monitoring points of the acetylene tank experience signal loss, exceeding the range, or excessive deviation, the Chaochi control system automatically triggers a fault-tolerant strategy: prioritizing the liquid level data from normal monitoring points; if all are abnormal, immediately stopping feeding and issuing a fault alarm to prevent the acetylene tank from becoming uncontrollable due to signal distortion; simultaneously, real-time verification of the temperature, pressure, and level sensor signals in the interlock is performed, and interlock is directly triggered when signals are abnormal, improving the anti-interference and fault-tolerant capabilities of the Chaochi control system.

[0033] To further verify the technical effect of this application, four typical production conditions were set up in the experiment. Each group was tested using the overdrive control system of this application and the three-impulse control system in the prior art. Core operating data were recorded. All data were measured steady-state data on site.

[0034] Examples 1-4 employ the override control system of this application, while Comparative Examples 1-4 employ the three-impulse control system in the prior art. The specific test results are as follows:

[0035] As can be seen from the table above, this application has made significant progress, specifically in the following aspects: 1. Timeliness of response: The overdrive control system of this application is significantly superior. The three-impulse control system relies on the average of three parameters for calculation, resulting in a fixed calculation lag. The response time for single-parameter and dual-parameter anomalies is over 2.8s, and the average response time under dynamic conditions is 3.0s. In contrast, the overdrive control system abandons the mean cancellation logic and directly identifies single-parameter anomaly signals. The response time is stable at around 1.0s, which is about 3 times faster. It can quickly capture subtle changes in operating conditions and prevent anomalies from escalating.

[0036] 2. Operational stability: The override control system of this application exhibits smaller fluctuations and higher steady-state accuracy. Because the three-impulse control system uses multi-parameter averaging to balance, single-parameter anomalies are offset by normal parameters, resulting in insufficient adjustment force, lag oscillation, large parameter fluctuation deviations, and a recovery time of over 18 seconds. The overdrive control system has independent parameter discrimination and priority interlocking logic, prioritizing the handling of pressure anomalies and precisely fine-tuning liquid level anomalies. It has no parameter offsetting problem, reduces parameter fluctuation deviations by more than 60%, improves the recovery speed of the working condition by 2 to 3 times, and the steady-state parameters are closer to the optimal range of the process.

[0037] 3. Adaptability to complex operating conditions: The overdrive control system in this application has stronger anti-interference capabilities. Under complex operating conditions with abnormal pressure and liquid level parameters, the three-impulse control system suffers from multiple parameters interfering with each other, resulting in chaotic adjustment logic, multiple opening oscillations, and slow recovery of operating conditions. The Chaochi control system, relying on mature pressure priority logic, accurately distinguishes the abnormality level and makes precise adjustments step by step, completely solving the problem of multi-parameter coupling interference and perfectly adapting to dynamic fluctuations in production load.

[0038] In some embodiments, the liquid level detection unit further includes liquid level sensors installed on the side wall of the generator and the side wall of the water seal tank, used for real-time monitoring of three monitoring points: median liquid level, high liquid level alarm, and low liquid level alarm. Combined with monitoring data such as high acetylene generator temperature, high secondary storage tank pressure, abnormal material level, open lower valve, and high forward / reverse water seal liquid level, a multi-condition "shutdown if any condition is not met" hard interlock is constructed. Core operating conditions such as high acetylene generator temperature, high pressure, high / low liquid level, high acetylene gas tank liquid level, high secondary storage tank pressure, abnormal material level, high forward / reverse water seal liquid level, and abnormal lower valve opening are included in the interlock library. If any condition triggers an abnormality, the program directly determines the operational risk and forcibly shuts down the vibrating feeder. Compared to traditional "partial condition interlocks," this achieves full-scenario risk coverage from the "equipment body" to the "auxiliary system" and then to the "actuator," eliminating feeding operations under abnormal conditions from the source.

[0039] In some embodiments, the Chaochi control system of this application adopts a hierarchical priority design of interlocking logic, setting the core safety conditions such as high temperature, high pressure, and high liquid level of the acetylene generator as the highest priority, and immediately cutting off the feeding when triggered; setting the auxiliary operating conditions such as the material level of the second storage hopper and the status of the lower valve as the second priority, which ensures both core safety and avoids accidental stopping of the feeding program due to minor auxiliary abnormalities, thus balancing safety and production continuity.

[0040] In some embodiments, the Chaochi control system of this application adopts a fault self-diagnosis and signal fault tolerance mechanism, with built-in liquid level signal anomaly diagnosis. When the three liquid level points experience faults such as signal loss, over-range, or excessive deviation, the fault tolerance strategy is automatically triggered: normal liquid level point data is used first, and if all are abnormal, the feeding is immediately stopped and a fault alarm is issued to avoid gas tank runaway due to signal distortion; at the same time, the sensor signals of interlocking conditions (such as temperature, pressure, and material level) are verified in real time, and the interlock is directly triggered when the signal is abnormal, thereby improving the anti-interference and fault tolerance capabilities of the program.

[0041] In some embodiments, the Chaochi control system of this application adopts a two-way intelligent logic of "self-starting when conditions are met + self-shutting down when any abnormality occurs": the program automatically starts feeding only when all interlocking conditions are met and the intermediate liquid level of the gas holder reaches the preset feeding trigger threshold; if any interlocking condition is not met during operation, the program immediately stops and uploads fault information without manual intervention, realizing a "unattended, automatic protection" control mode, reducing the lag and error rate of manual operation.

[0042] The above description is merely a preferred embodiment of the present invention and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An automatic feeding adjustment method for an acetylene generator, characterized in that: An override control system is used to control the feed rate of the vibrating feeder. This involves using a combination of liquid level center value optimization and pressure priority interlocking logic to achieve immediate response to single-parameter anomalies and priority handling of dual-parameter anomalies. This allows for rapid and automatic switching of the vibrating feeder's opening degree, while achieving a smooth transition and automatic adjustment based on tracked input variables. The specific control process includes the following steps: S1, Pressure Linkage Control: When the pressure of the acetylene generator exceeds the upper limit threshold, the overdrive control system determines that the pressure is too high and outputs a command to automatically reduce the opening of the vibrating feeder, thereby reducing the amount of calcium carbide fed in, reducing the reaction intensity, and preventing overpressure. When the acetylene generator pressure is less than or equal to the upper threshold and greater than or equal to the lower threshold, the Chaochi control system enters the automatic adjustment mode and dynamically adjusts the opening of the vibrating feeder according to the pressure change trend to maintain process stability. When the pressure of the acetylene generator is lower than the lower threshold, the output command will automatically increase the opening of the vibrating feeder to increase the calcium carbide feed rate and improve the reaction efficiency. S2, Liquid Level Linkage Control: When the corresponding liquid level values ​​of the three liquid level monitoring points (median, high, and low) in the acetylene gas holder change in real time, the Chaochi control system selects the median liquid level value of the three liquid level monitoring points as the setpoint of the vibrating feeder through the selector to automatically adjust and maintain the stability of the liquid level in the acetylene gas holder. When the acetylene tank level triggers a high level alarm or a low level alarm, the Chaochi control system prioritizes responding to the alarm signal and automatically adjusts the opening of the vibrating feeder to quickly restore the level to a safe range. Priority logic is established between level linkage control and pressure linkage control: when both the acetylene generator pressure and the acetylene tank level are abnormal, the overdrive control system prioritizes handling the pressure alarm to ensure production safety.

2. The automatic feeding adjustment method for an acetylene generator according to claim 1, characterized in that: In step S1, the upper limit threshold is 10 kPa and the lower limit threshold is 8 kPa.

3. The automatic feeding adjustment method for an acetylene generator according to claim 1, characterized in that: In steps S1 and S2, the output of the overdrive control system is limited to ensure that the opening of the vibrating feeder is within a safe range, thus avoiding severe fluctuations that could impact the stable operation of the acetylene generator.

4. The automatic feeding adjustment method for an acetylene generator according to claim 3, characterized in that: The amplitude limiting process includes amplitude hard limiting and rate of change ramp limiting; amplitude hard limiting is used to limit the upper and lower limits of the opening of the vibrating feeder, so that the opening is within a safe working range; rate of change ramp limiting limits the maximum change amplitude of the control output in a single cycle, suppresses sudden changes in the opening of the vibrating feeder, and avoids the impact of violent fluctuations in feed on the stable operation of the acetylene generator.

5. The automatic feeding adjustment method for an acetylene generator according to claim 1, characterized in that: In step S2, using the selected intermediate liquid level as the core, a dynamic closed-loop tracking system is constructed to monitor the liquid level height of the vibrating feeder and the acetylene tank. This enables the vibrating feeder to adaptively adjust its feeding rate according to the acetylene tank liquid level: when the liquid level is low, the opening of the vibrating feeder is automatically increased; when the liquid level is high, the opening of the vibrating feeder is automatically decreased or feeding is paused. This precisely matches the supply and demand balance of acetylene-generated materials, avoiding the risk of overpressure and cavitation in the acetylene tank.

6. An automatic feeding adjustment method for an acetylene generator according to claims 1 to 5, characterized in that: It also includes the following steps: S3, Interlocking and Protection Control Overpressure Interlock: When the pressure of the acetylene generator exceeds the safety threshold, the Chaochi control system immediately triggers the emergency interlock, shuts down the vibrating feeder, and starts the acetylene generator cooling system to prevent explosion or equipment damage. Liquid level interlock: When the acetylene tank liquid level reaches the high-high level, the Chaochi control system automatically shuts off the vibrating feeder and triggers an audible and visual alarm to notify the operator to intervene. Fault Diagnosis: The Chaochi control system monitors the status of each detection unit and actuator in real time. Once a fault is detected in any pressure, temperature, or level sensor or an actuator jams abnormally, an alarm is immediately triggered and the system switches to a safety mode to prevent loss of control.

7. The automatic feeding adjustment method for an acetylene generator according to claim 6, characterized in that: The standard range for the acetylene tank level is 40% to 60%, with high level > 60% and low level < 40%; the safe opening range for the vibrating feeder is 20% to 60%.

8. The automatic feeding adjustment method for an acetylene generator according to claim 6, characterized in that: In step S2, when the three level monitoring points of the acetylene tank experience signal loss, over-range, or excessive deviation, the Chaochi control system automatically triggers a fault-tolerant strategy: it prioritizes using the level data from the normal level monitoring points; if all are abnormal, it immediately stops feeding and issues a fault alarm to prevent the acetylene tank from going out of control due to signal distortion; at the same time, it performs real-time verification of the temperature, pressure, and level sensor signals in the interlock, and directly triggers the interlock when the signal is abnormal, thereby improving the anti-interference and fault-tolerant capabilities of the Chaochi control system.

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