Automatic feeding circulating device for girder plate and control method

Abstract

The invention relates to the technical field of wind power blade machining, in particular to a girder plate automatic feeding circulating device and a control method, and the device comprises a discharging device which is used for feeding or stopping feeding to a hopper according to a control signal; the floating ball device is connected with the inductive switch and is used for detecting the height of the liquid level and transmitting the liquid level information to the control unit; and the control unit is internally preset with charging duration and charging interval duration and is used for receiving the liquid level information transmitted by the inductive switch and outputting a control signal according to the liquid level information and time information to control the discharging device to work or stop working. The design that the floating ball device is combined with the proximity inductive switch is adopted, and the time relay is precisely matched with the inductive switch, so that high-precision liquid level control and no excessive or insufficient feeding phenomenon during automatic feeding of resin glue liquid are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power blade processing, and particularly relates to an automatic feeding and circulating device for a girder plate and a control method therefor. Background Art

[0002] Currently, the traditional dipping and pultrusion process is adopted for the wind power girder pultruded plate. An impregnation tank is arranged on the production line. When the glass fiber passes through the glue tank, it adheres to the resin glue solution to achieve the purpose of impregnation. Currently, the semi-automatic feeding method is used at the production site. The uncontrollability of the quantification of the resin glue solution leads to unstable product quality. When the amount of the resin material liquid in the glue tank is too much, the curing agent in the glue solution is prone to moisture absorption, and the increased viscosity will affect the curing of the resin. Quality problems such as uneven yarn impregnation, non-sticking of the release cloth, foreign matters, and large fluctuations in straightness are likely to occur in the pultruded plate. When the amount of the resin glue solution in the impregnation tank is too little, it will affect the uniform impregnation of the yarn, and the phenomenon of white yarn pulling will occur in the pultruded plate.

[0003] As a core component of the wind power blade, the girder plate is a key load-bearing structure of the blade, and the quality stability during its production process is crucial. A stable feeding system can reduce the fluctuations in process stability caused by the differences in manual operations, and significantly improve the quality consistency of the girder plate. Currently, the semi-automatic feeding method is mainly used at the production site, but this feeding method has the problem of low efficiency. It depends on the manual feeding experience, and problems such as overfeeding or underfeeding are likely to occur, affecting the product quality.

[0004] Publication No.: CN218517061 An automatic impregnation device for the pultrusion process of xuan fiber composite materials. When the liquid level of the impregnation tank drops to the level where the glue solution needs to be replaced, the liquid level sensor sends a signal to the PLC controller. The PLC controller first controls the opening of the recovery valve and the recovery pump, and pumps the remaining glue solution in the impregnation tank into the recovery glue tank; when the liquid level of the impregnation tank reaches the bottom, the PLC controller controls the closing of the recovery valve and the recovery pump, and then opens the feed valve on the feed pipe to start sending the new glue solution from the glue storage tank to the impregnation tank. After the liquid level reaches the set value, the PLC controller controls the closing of the feed valve to stop sending the glue, thus completing the automatic recovery and replacement of the glue solution. The recovered glue solution can be used elsewhere, avoiding waste and saving costs. However, relying on the feedback of the liquid level sensor, misjudgment of the actual liquid level by the sensor may occur due to stirring and foam, resulting in unstable feeding, or overfeeding or underfeeding.

[0005] Therefore, there is an urgent need for a new automatic feeding and circulating device and method for the girder plate to solve the problem of unstable feeding existing in the prior art. Summary of the Invention

[0006] In view of this, the present invention aims to provide an automatic feeding and circulating device for a girder plate and a control method therefor to solve the problem of unstable feeding existing in the prior art.

[0007] Prior art solutions and their drawbacks: The semi-automatic feeding device is located at the bottom of the material bucket, with each discharging port corresponding to one dipping tank equipment. When the operator presses the discharging button corresponding to the dipping tank on the control panel, after the button signal is received, it first detects the status of the pipeline pressure sensor. If the system is normal, two instructions are output simultaneously. One is to start the conveying motor, and the other is to open the discharging valve of the corresponding dipping tank. The motor drives the material to be conveyed through the pipeline and flows into the target dipping tank through the opened valve. A flowmeter is installed in the pipeline, and when the set quantity is reached, it gives feedback to close the valve and the motor; in any link, the emergency stop button can be pressed to cut off the power supply. If the motor is overloaded or the valve fails, an alarm is given and the operation stops. There are two problems: First, semi-automatic feeding still requires the operator to start, monitor, or adjust regularly, and full-process automation cannot be achieved, increasing labor costs; improper parameter settings and inaccurate feeding timing may lead to inaccurate batching and equipment failures; human factors cause operation differences in different batches, increasing the difficulty of quality control. Second, when adjusting the feeding parameters or process in semi-automatic feeding, it needs to be manually reconfigured, which is time-consuming and error-prone, and has poor adaptability to viscous and easily caking materials, requiring additional treatment.

[0008] The feeding solution of this application is an automatic circulating material system for glue liquid, replacing the existing semi-automatic feeding method. The system uses a 24V power supply, a proximity induction switch, a set of float devices, an adjustable time relay, and two intermediate relays. When the time relay starts working, it simultaneously closes the manual discharging button of the original discharging system. The discharging system injects glue liquid into the hopper, and the injection duration is controlled by the adjustable time relay; when the set maximum liquid level is reached, the float device rises to the limit point, the proximity induction switch works, cuts off the power supply of the time relay, and disconnects the manual discharging button of the original discharging system to stop feeding, completing one feeding cycle. At this time, it enters the next cycle of feeding waiting period.

[0009] The automation of material liquid control realizes continuous and stable feeding. The resin capacity in the hopper is only about 3 - 5L. The storage capacity of the hopper is low, the material liquid circulates quickly, the viscosity is maintained at a relatively low level, keeping the continuous flow and full mixing of the resin system, with good yarn infiltration effect, effectively reducing the influence of the material liquid by external water vapor and foreign objects, significantly improving serious quality problems such as poor adhesion of the release cloth, fluctuations and out-of-tolerance of straightness, and foreign object inclusion. At the same time, the small storage capacity of the hopper also greatly reduces the volatilization of organic small molecules in the material liquid to the environment, improves the control of feeding, storage, and material liquid reflux, greatly reduces the dripping of the material liquid, and better restores the air quality in the dipping room. It realizes the continuous and stable production of pultruded plates and improves the product quality.

[0010] The automatic feeding system can achieve feeding in small amounts multiple times, reduce human intervention, and ensure the straightness of the product. When feeding, operators can handle other related work simultaneously. It can reduce the requirements for employees' skills, making it relatively easy for employees to take up their posts. After the implementation of this project, it is expected to effectively save processes such as the feeding process and the preform self-inspection process, reduce the workload in the dipping room. It is estimated that one person can be saved for every 10 sets of equipment on average. Calculated based on an annual labor cost of about 80,000 yuan per person and a full production of 60 production lines throughout the year, 480,000 yuan of labor costs can be saved. At the same time, it can significantly reduce the waste of liquid materials caused by downtime. It is expected that the consumption of liquid materials during initial drawing and downtime can be reduced to 60% of the existing production line level, that is, 5 kilograms of raw materials can be saved each time during initial drawing and downtime. Calculated at 20 yuan per kilogram of raw material, the material cost can be saved by 100 yuan per time. Calculated based on statistics once a month for each production line, 72,000 yuan of rubber material costs can be saved throughout the year. A total of 552,000 yuan of labor and material costs can be saved throughout the year.

[0011] The technical solution of the present invention is realized as follows:

[0012] An object of the present invention is to disclose an automatic feeding circulation device for a large beam plate, including:

[0013] A blanking device for feeding materials into or stopping feeding into the hopper according to a control signal;

[0014] A float device, the float device is connected to an induction switch for detecting the liquid level height and transmitting the liquid level information to the control unit;

[0015] The control unit, which is preset with a feeding duration and a feeding interval duration, for receiving the liquid level information transmitted by the induction switch and outputting a control signal according to the liquid level information and time information to control the work or stop the work of the blanking device.

[0016] Further, the blanking device includes a material storage tank, a material suction pipeline, a feed pump, and a material delivery pipeline connected in sequence;

[0017] The material storage tank is used for storing rubber materials;

[0018] The material suction pipeline connects the material storage tank and the feed pump and serves as a channel for material transportation;

[0019] The feed pump serves as a power source for pumping materials out of the storage tank and pressurizing and transporting them;

[0020] The material delivery pipeline is used for transporting the materials output by the feed pump to the target position.

[0021] Further, one end of the material delivery pipeline far from the feed pump communicates with the inner cavity of the hopper, and the material delivery pipeline is provided with a valve for adjusting the flow rate and controlling the on-off.

[0022] Further, the hopper is a hemispherical shell with an open upper part, and a discharge pipe is provided at the bottom. A flow control valve is provided on the discharge pipe.

[0023] Further, the capacity of the rubber material in the hopper is 3 - 5 L.

[0024] Further, the float device includes a float, a sliding sleeve, an induction ring, and a guide rod connected in sequence from bottom to top;

[0025] The float floats on the liquid surface and floats up and down with the liquid level;

[0026] The sliding sleeve connects the float and the induction ring, allows the float to move freely along the guide rod, and provides a certain frictional force to stabilize the position of the float;

[0027] The induction ring contains or attaches an induction element, and triggers a signal when it moves to a specific position with the float;

[0028] The guide rod is vertically fixedly installed, provides guiding support for the entire float assembly, and ensures that the float and the induction ring can move up and down smoothly.

[0029] Further, the induction switch is an inductive or capacitive proximity switch.

[0030] Further, the control unit is provided with an adjustable time relay, which can automatically start and stop the feeding device at preset time intervals.

[0031] Another object of the present invention is to disclose a control method for an automatic feeding and circulating device of a large beam plate. Based on any one of the above - mentioned automatic feeding and circulating devices of a large beam plate, it specifically includes the following steps:

[0032] S1: Preset the feeding duration, feeding interval duration, and liquid level value;

[0033] S2: The float device detects the liquid level height in the hopper, and the induction switch transmits the liquid level information to the control unit;

[0034] S3: After the control unit receives the liquid level information, when the liquid level is lower than the set value, step S4 is executed; when the liquid level is higher than the set value, step S5 is executed;

[0035] S4: The feeding device starts to inject rubber liquid into the hopper. When the injection time of the rubber material is equal to the set feeding duration, step S5 is executed; when the injection time of the rubber material is less than the set feeding duration, step S2 is executed;

[0036] S5: Stop feeding;

[0037] S6: After the set feeding interval duration ends, execute S2.

[0038] Further, in step S1, the feeding duration and the feeding interval duration are preset; wherein, the feeding duration is comprehensively set according to the feeding capacity of the feeding device per unit time and the capacity of the hopper, and the feeding interval duration is determined according to the minimum consumption cycle of the glue in the actual processing process; at the same time, the highest liquid level threshold and the lowest liquid level threshold in the hopper are set to control the start and stop of feeding.

[0039] Compared with the prior art, a large beam plate automatic feeding circulation device and a control method thereof of the present invention have the following advantages:

[0040] 1. The present invention adopts a design combining a float device and a proximity induction switch, ensuring high-precision liquid level control during the automatic feeding of resin glue and no phenomenon of overfeeding or underfeeding. Through the precise cooperation of the time relay and the induction switch, the entire feeding process is more intelligent and accurate, significantly reducing the product quality fluctuation problem caused by insufficient manual monitoring, and improving the quality consistency and stability between different batches of products.

[0041] 2. The present invention is provided with a recovery system composed of a specially designed inclined surface collection tank and a pneumatic diaphragm pump. These components can effectively collect the infiltrated surplus materials and re-inject them into the hopper, ensuring the efficient recycling of materials, simplifying the operation process, greatly improving the material utilization rate, reducing the cost increase caused by material waste, and enhancing the overall production efficiency and environmental protection performance.

[0042] 3. The present invention provides an automatic cyclic feeding method of "small amount and multiple times". First, it accurately replenishes the current required amount, and then conducts the next round of feeding after the set interval time ends, avoiding the problems of glue volatilization and oxidation that may be caused by traditional large-scale one-time feeding, effectively reducing the influence brought by viscosity change, further enhancing the quality stability of the final product, and providing a reliable guarantee for the subsequent pultrusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0044] Figure 1 is the overall structural schematic diagram of the device of the present invention.

[0045] Reference numerals:

[0046] 1. Blanking device; 101. Material storage tank; 102. Suction pipeline; 103. Feed pump; 104. Feed pipeline; 2. Hopper; 201. Discharge pipe; 202. Flow control valve; 3. Float device; 301. Float; 302. Sliding sleeve; 303. Induction ring; 304. Guide rod; 4. Inductive switch; 5. Control unit; 6. Adjustable time relay. Detailed implementation manners

[0047] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0048] It should be noted that all terms indicating directions and positions in the present invention, such as: "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "bottom", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection situation between components in a specific state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0049] In the description of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0051] Compared with the existing automatic feeding device using a liquid level sensor, the control of the existing liquid level sensor may misjudge the actual liquid level due to stirring and foaming, resulting in unstable feeding. Time control avoids the interference of liquid level fluctuations on the material ratio by fixing the feeding rate, and is especially suitable for the materials where the viscosity of the resin curing agent increases and it is easy to foam during the increased pultrusion time of pultruded glass plates. At the same time, simple liquid level control may have a response delay, resulting in overfeeding or underfeeding. With the addition of time control through an accurate flow meter, it ensures that the feeding amount is consistent each time, reduces batch differences, and is beneficial to the control of the straightness of pultruded glass plates.

[0052] In addition, pultruded glass plates have high requirements for material uniformity. The forming of pultruded plate composites requires precise control of the resin injection rate to avoid pores. Time control for continuous feeding can maintain a stable raw material input speed, avoid ratio deviations caused by liquid level changes, and improve the consistency of the quality of pultruded glass plates. Sudden changes in liquid level may introduce the risk of bubbles or delamination. Continuous feeding reduces internal defects through gentle material replenishment, which is especially crucial for large beam plates. The pultrusion process of pultruded plates is in a high-temperature or dusty environment. During this process, the liquid level sensor is prone to failure. Compared with liquid level automatic feeding control, time relay control requires timing and flow control, and has higher reliability. In addition, liquid level control needs to frequently adjust parameters to adapt to different liquid levels, while time control does not require intervention after presetting the program, which is suitable for continuous production lines, reduces the dependence on liquid level sensors, avoids shutdown maintenance caused by sensor failures, and the stable feeding rate can accurately calculate the raw material consumption and avoid overfeeding caused by liquid level fluctuations. The multiple control methods adopted in this application have increased the qualified rate from 90% to 99% in actual applications, effectively reducing the waste rate.

[0053] The present invention discloses a large beam plate automatic feeding circulation device, including:

[0054] A feeding device 1, configured to feed or stop feeding the hopper 2 according to a control signal;

[0055] A float device 3, the float device 3 is connected to an induction switch 4, and is used to detect the liquid level height and transmit the liquid level information to the control unit 5;

[0056] A control unit 5, which is internally preset with a feeding duration and a feeding interval duration, and is used to receive the liquid level information transmitted by the induction switch 4, and output a control signal to control the operation or stop of the feeding device 1 according to the liquid level information and time information.

[0057] The feeding device 1 starts or stops feeding the hopper 2 according to the control signal from the control unit 5, with a fast response speed and can precisely control the feeding process. The float device 3 + proximity switch 4 detects the height of the rubber material in the hopper 2 by the position movement of the float 301 as the liquid level changes. It has a simple structure and high reliability, can real-time feedback the current liquid level state. The control unit 5 receives the liquid level information from the float device 3, combines the preset feeding duration and feeding interval time, and judges whether to start or stop the feeding device 1, and can set the feeding strategy under different working conditions.

[0058] The control unit 5 starts the feeding device 1 according to the preset cycle. The rubber material gradually enters the hopper 2, and the liquid level rises. When the rubber material approaches the set height, the float device 3 floats due to the buoyancy force, driving the connecting rod to move. The connecting rod triggers the proximity switch 4 and sends a high liquid level signal to the control system. After receiving the signal, the control system immediately stops feeding. After the set feeding interval duration ends, it enters the next feeding cycle. It can also be that when the liquid level is lower than the set value, the proximity switch 4 is triggered, and the signal is transmitted to the control unit 5. The control unit 5 judges whether to start the feeding device 1 for supplementary feeding according to the preset time parameters. The feeding device 1 performs the feeding operation until it stops after reaching the set liquid level or time, and the whole process circulates to achieve automatic feeding control.

[0059] This setting adopts the design of combining the float device 3 and the proximity switch 4, ensuring high-precision liquid level control and no overfeeding or underfeeding phenomenon during the automatic feeding of the resin glue. Through the precise cooperation of the time relay and the proximity switch 4, the whole feeding process is more intelligent and accurate, significantly reducing the product quality fluctuation problem caused by insufficient manual monitoring, and improving the quality consistency and stability among different batches of products.

[0060] Specifically, the feeding device 1 includes a material storage tank 101, a suction pipeline 102, a feeding pump 103, and a feeding pipeline 104 connected in sequence;

[0061] The material storage tank 101 is used to store the rubber material;

[0062] The suction pipeline 102 connects the material storage tank 101 and the feeding pump 103 and serves as the channel for material transportation;

[0063] The feeding pump 103 serves as the power source and is used to pump out the material from the storage tank and pressurize and transport it;

[0064] The feeding pipeline 104 is used to transport the material output by the feeding pump 103 to the target position.

[0065] The material storage tank 101 provides a stable and continuous material reserve to ensure that there is no shortage of materials during the operation of the system. The material suction pipeline 102 guides the material from the storage tank to the inlet of the material transfer pump 103 to ensure the smooth suction of the material. The material transfer pump 103, as the core power component, provides a pressure difference to achieve the controllable transportation of the material. Different types of pumps can be selected according to the material characteristics, such as screw pumps, gear pumps, etc. The material transfer pipeline 104 efficiently and safely transports the material sent by the pump to the designated position and is usually equipped with valves to control the flow rate and on / off.

[0066] Through reasonable pipeline layout and power configuration, this setting can accurately and stably complete the transportation task of rubber compound or other viscous materials according to the signals sent by the control system, and it is the core part that executes actions in the entire feeding cycle system.

[0067] Specifically, the end of the material transfer pipeline 104 far from the material transfer pump 103 is connected to the inner cavity of the hopper 2. The material transfer pipeline 104 can be provided with valves to adjust the flow rate and control the on / off.

[0068] The connection between the material transfer pipeline 104 and the hopper 2 can ensure that the rubber compound can directly and efficiently enter the inside of the hopper 2, avoiding external contamination and material loss. At the same time, it is convenient to achieve continuous or periodic feeding. Valves are set on this section of the material transfer pipeline 104, which can control the on / off of the material, realize the on / off function, and at the same time adjust the flow rate of the material. For example, an adjustable valve is used to achieve refined feeding; cooperate with the control system to achieve timed and quantitative feeding. It supports multiple working modes such as continuous feeding, intermittent feeding, and manual debugging to meet different process requirements. When the equipment is under maintenance or fails, the material transportation path can be quickly cut off by closing the valve to ensure the safety of personnel and equipment.

[0069] This setting enhances the controllability and safety of the entire automatic feeding cycle device of the girder plate, and improves its intelligent level and engineering adaptability.

[0070] Specifically, the hopper 2 can be a hemispherical shell with an open upper part, and a discharge pipe 201 is provided at the bottom. A flow control valve 202 is provided on the discharge pipe 201.

[0071] The hemispherical hopper 2 shell takes advantage of the geometric shape to make the material more easily concentrated at the bottom outlet under the action of gravity, with better material fluidity, less residue, and improved emptying efficiency. The bottom discharge pipe 201 realizes the shortest discharge path to ensure the smooth flow of the material, avoiding blockage or accumulation. The flow control valve 202 controls the discharge rate to meet different process requirements, can be connected to the control system to achieve discharging on demand, and supports multiple working modes, such as continuous, pulsed, timed, etc.

[0072] The hopper 2 has good mechanical properties, can withstand a certain pressure and impact, is suitable for a variety of industrial environments, has strong anti-blocking ability, smooth discharging, and small resistance, making the response of the entire feeding cycle system faster and improving the production rhythm.

[0073] Preferably, the capacity of the rubber compound in the hopper 2 is 3 - 5L.

[0074] Rubber compounds, such as structural adhesives and sealants, usually have a certain pot life. Controlling the capacity within 3 - 5L helps to complete the use within the effective time, reducing the risk of performance degradation caused by long-term storage. A small capacity means a low power requirement for the feeding pump 103, a short replenishment time, and lower overall energy consumption. At the same time, it reduces material waste, improves utilization rate, and is easier to cooperate with valves and sensors to achieve functions such as quick start and stop, precise metering, and closed-loop feedback, improving the intelligent level of the system. And with a moderate capacity, it is more convenient for manual cleaning or automatic cleaning, suitable for high-viscosity material systems that require regular maintenance, avoiding potential safety hazards caused by the accumulation of a large amount of rubber compound. Especially in high-temperature or enclosed environments, the small-capacity design can reduce the risk of accidental leakage or reaction.

[0075] Specifically, the float device 3 includes a float 301, a sliding sleeve 302, an induction ring 303, and a guide rod 304 connected in sequence from bottom to top;

[0076] The float 301 floats on the liquid surface and moves up and down with the liquid level;

[0077] The sliding sleeve 302 connects the float 301 and the induction ring 303, allows the float 301 to move freely along the guide rod 304, and provides a certain frictional force to stabilize the position of the float 301;

[0078] The induction ring 303 contains or attaches induction elements, such as magnetic switches, photoelectric sensors, etc., and triggers a signal when it moves to a specific position with the float 301;

[0079] The guide rod 304 is vertically fixedly installed, providing guiding support for the entire float 301 assembly to ensure that the float 301 and the induction ring 303 can move up and down smoothly.

[0080] Directly sense the liquid level change, float up and down with the liquid surface through the buoyancy principle, adapt to liquids with different densities, have good corrosion resistance and anti-aging performance. The sliding sleeve 302, as a connecting part, transmits the movement of the floating ball 301 to the induction ring 303, and at the same time ensures that the floating ball 301 can slide smoothly along the guide rod 304. Appropriate friction is used to prevent the floating ball 301 from making unnecessary movements due to fluid fluctuations. The induction ring 303 contains or integrates induction elements, which are used to detect the position of the floating ball 301 and convert it into an electrical signal to feedback to the control unit 5, with high sensitivity and fast response. Multiple induction points can be set as needed to achieve more refined liquid level monitoring. The guide rod 304 provides stable support and guidance for the floating ball 301 and the induction ring 303, ensuring that they can move along the predetermined path.

[0081] This setting accurately reflects the liquid level height, and the induction ring 303 precisely captures the position information to ensure that the control system obtains reliable data.

[0082] Preferably, the floating ball device 3 can be a floating ball 301 linkage mechanism.

[0083] The height of the material is reflected by the buoyancy change of the floating ball 301, driving the linkage mechanism to trigger the limit signal. The structure is simple, suitable for characteristics such as high viscosity of resin. The stainless steel material is easy to clean, resistant to harsh environments, not affected by dust, humidity, and electromagnetic interference. The installation height of the floating ball 301 can be adjusted to adapt to different limit requirements.

[0084] Specifically, the induction switch 4 can be an inductive / capacitive proximity switch, which is an electronic detection. When the floating ball 301 linkage reaches the set height, it triggers the proximity switch and sends an electrical signal to the control unit 5. The response is in milliseconds, suitable for high-precision control, and non-contact detection reduces mechanical wear.

[0085] Specifically, an adjustable time relay 6 is provided in the control unit 5, which can automatically start and stop the feeding device 1, such as solenoid valves, motors, conveyor belts, etc., according to the preset time interval. The feeding cycle can be set, such as starting once every 300 seconds, and the single feeding duration, such as running for 20 seconds each time. The control accuracy is higher in seconds. It supports manual / automatic switching, which is convenient for debugging and maintenance. The selected model has a memory function and a pause function, which is convenient for flexible adjustment.

[0086] Specifically, the device also includes a 24V power supply and two intermediate relays.

[0087] The 24V power supply provides a stable 24V DC power supply for the entire automatic feeding cycle system, ensuring the normal operation of each component, such as the induction switch 4, time relay, intermediate relay, etc. Compared with high-voltage power supplies, the 24V power supply has higher safety, reduces the risk of electrical faults, and helps to reduce long-term operating costs.

[0088] The intermediate relay can play the role of signal isolation and amplification between the control system and the actuator. For example, it can convert weak control signals, such as signals from a time relay or an inductive switch 4, into strong electrical signals that can drive larger loads, such as motors or valves. By isolating the control circuit and the actuator circuit, it can prevent damage to the control system caused by faults in the actuator circuit, such as short circuits or overloads.

[0089] This setting increases the redundancy of the system. Even if a certain part fails, other parts can still work normally, improving the reliability of the overall system. Different specifications of intermediate relays can be selected according to different application scenarios to meet different load requirements, which is convenient for expansion and upgrading.

[0090] Specifically, the device also includes electric or pneumatic valves for controlling the flow of liquids or powders, such as solenoid valves, ball valves, etc.

[0091] Electric ball valves / butterfly valves are suitable for flow control with large diameters and high-precision regulation; pneumatic valves are commonly used in flammable, explosive or clean environments, with fast response and high safety. They are usually installed on the feeding pipeline 104, between the outlet of the feeding pump 103 and the hopper 2, and are used to control whether the material flows into the hopper 2 or the processing equipment. Solenoid valves are suitable for liquid control with small flow rates and fast start / stop, and can cooperate with the control system to achieve functions such as quantitative feeding and pulsed feeding, meeting high-precision process requirements, making the feeding process more flexible and controllable, shortening the replenishment time, and quickly cutting off the material flow in case of faults or emergencies to prevent leakage, overflow or pollution.

[0092] Specifically, the control unit 5 includes an embedded controller, which is suitable for small systems and has a relatively low device cost.

[0093] An embedded controller refers to a control module that integrates a microprocessor, input / output interfaces, memory, etc. Common types include: single-chip microcomputers, such as STM32, AVR, PIC; industrial PLCs, such as small integrated PLCs; embedded industrial control motherboards, such as those based on the ARM architecture, etc. It is used to receive input signals from the float 301 level sensor, inductive switch 4, flowmeter, etc., and judge whether to start the feeding device 1 according to the preset level threshold and time parameters, and control functions such as starting and stopping the feeding pump 103, opening and closing the valves, and alarm prompts, and supports setting process parameters such as feeding duration, feeding interval, upper and lower level limits, etc.

[0094] Specifically, the device also includes an emergency stop button for manually and forcibly interrupting the feeding process.

[0095] Installed at an obvious position outside the device operation panel or control box for easy and quick operation; after being triggered, it can cut off the power supply of the main control circuit or control system to achieve immediate shutdown, prevent the device from running out of control, protect the operator and the device itself, respond quickly with almost no delay, do not rely on the program or control system, and the physical open circuit is more stable.

[0096] Specifically, the device further includes an inclined collecting tank for collecting infiltrated surplus materials. A pipeline is installed below the collecting tank and connected to a pneumatic diaphragm pump, which increases the pressure to pump the materials into the hopper 2 to form a cycle.

[0097] The inclined collecting tank is installed in the feeding area or below the workpiece to collect dripping, residual or overflowing glue. The inclined design facilitates the natural flow of the liquid to the bottom outlet, and is used to collect the infiltrated glue or other process surplus materials that have not been fully utilized. The pneumatic diaphragm pump is driven by compressed air and has characteristics such as strong self-priming ability, corrosion resistance, and explosion protection. It is installed below the collecting tank and is used to re-transport the collected surplus materials back to the hopper 2. The connecting pipeline connects the collecting tank with the pneumatic diaphragm pump and the pump with the hopper 2 to realize the complete cycle path of surplus material collection → transportation → recycling → reuse.

[0098] This setting collects unused glue or cleaning liquid, avoids waste, improves the material utilization efficiency, avoids glue dripping and leaking to pollute the ground or equipment, keeps the working area clean and tidy, and has a simple and reliable structure.

[0099] Another object of the present invention is to disclose a control method for the automatic feeding and recycling device of the girder plate. Based on any one of the above-mentioned automatic feeding and recycling devices of the girder plate, it specifically includes the following steps:

[0100] S1: Preset the feeding duration, feeding interval duration and liquid level value;

[0101] Set the system parameters, determine the feeding time, feeding interval and liquid level value to achieve timing and quantitative control and prevent overflow.

[0102] S2: The float device 3 detects the liquid level height in the hopper 2, and the inductive switch 4 transmits the liquid level information to the control unit 5;

[0103] Realize real-time liquid level monitoring, which is an important basis for starting / stopping feeding.

[0104] S3: After the control unit 5 receives the liquid level information, when the liquid level is lower than the set value, execute step S4; when the liquid level is higher than the set value, execute step S5;

[0105] The core of the control logic is to judge whether feeding is needed currently.

[0106] S4: The feeding device 1 starts to inject glue into the hopper 2. When the injection time of the glue equals the set feeding duration, step S5 is executed. When the injection time of the glue is less than the set feeding duration, step S2 is executed;

[0107] Start the feeding device 1, perform the replenishment operation, and prevent overfeeding through time limitation.

[0108] S5: Stop feeding;

[0109] Stop the feeding action to protect the equipment and prevent overflow.

[0110] S6: After the set feeding interval duration ends, execute S2;

[0111] Wait for the set time and then re-detect the liquid level to form a periodic control loop and avoid frequent start and stop.

[0112] Trigger the induction switch 4 through the float device 3 to automatically cut off the feeding; use a time relay to accurately control the single feeding duration and allow flexible adaptation to different feeding speed requirements. The system adopts an automatic cycle design of "small amount and multiple times" to reduce glue volatilization / oxidation and improve product quality.

[0113] This setting reduces human intervention, improves the degree of automation, realizes closed-loop regulation, avoids overfeeding or underfeeding, and the infiltrated surplus material flows back to the hopper 2 through the collection tank and the pneumatic diaphragm pump to form a cycle, solving the problem of unstable quality caused by human factors in the semi-automatic feeding process, improving the feeding accuracy and efficiency through automation means, and realizing more precise feeding control.

[0114] Specifically, in step S1, the feeding duration and the feeding interval duration are preset; among them, the feeding duration is comprehensively set according to the feeding capacity of the feeding device 1 per unit time and the capacity of the hopper 2, and the feeding interval duration is determined according to the minimum consumption cycle of the glue in the actual processing process; at the same time, the highest liquid level threshold and the lowest liquid level threshold in the hopper 2 are set to control the start and stop of feeding.

[0115] Due to the uncertainty of the consumption of the liquid material, the system sets the feeding parameters according to the saturated feeding method to ensure that there will be no material shortage under high-load working conditions, maintain continuous feeding; prevent frequent start and stop; the float device 3 is set according to the highest liquid level required by the process to realize the upper and lower limit control of the liquid level and ensure safe operation; provide a judgment basis for the start and stop of feeding. The feeding duration is determined according to the maximum feeding amount of the feeding device 1 per unit time to avoid excessive single feeding causing overflow or system pressure fluctuation; ensure that the feeding is controllable.

[0116] The dual control of setting time and liquid level makes the material supply more accurate and stable, can flexibly adjust parameters according to different process requirements, can effectively prevent overflow, protect equipment and the environment, avoid the long-term idling or blockage of the feeding pump 103, reduce unnecessary start-stop times, and reduce mechanical shock and energy consumption.

[0117] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic feeding and circulating device for a large beam plate, characterized in that, Including: A blanking device (1) for adding or stopping adding materials to a hopper (2) according to a control signal; A float device (3), the float device (3) is connected to an induction switch (4) for detecting the liquid level height and transmitting the liquid level information to a control unit (5); The control unit (5) has preset feeding duration and feeding interval duration inside, and is used for receiving the liquid level information transmitted by the induction switch (4) and outputting a control signal according to the liquid level information and time information to control the operation or stop of the blanking device (1).

2. The automatic feeding and circulating device for the main beam plate according to claim 1, characterized in that, The blanking device (1) includes a material storage tank (101), a material suction pipeline (102), a material delivery pump (103), and a material delivery pipeline (104) connected in sequence; The material storage tank (101) is used for storing rubber materials; The material suction pipeline (102) connects the material storage tank (101) and the material delivery pump (103) and serves as a channel for material transportation; The material delivery pump (103) serves as a power source for pumping materials out of the storage tank and pressurizing and transporting them; The material delivery pipeline (104) is used for transporting the materials output by the material delivery pump (103) to a target position.

3. The automatic feeding and circulating device for the girder slab according to claim 2, characterized in that, One end of the material delivery pipeline (104) far from the material delivery pump (103) communicates with the inner cavity of the hopper (2), and the material delivery pipeline (104) is provided with a valve for adjusting the flow rate and controlling the on-off.

4. The automatic feeding and recycling device for the girder slab according to claim 1, characterized in that, The hopper (2) is a hemispherical shell with an open upper part, and a discharge pipe (201) is arranged at the bottom, and a flow control valve (202) is arranged on the discharge pipe (201).

5. The automatic feeding and recycling device for the girder slab according to claim 1, wherein The rubber material capacity in the hopper (2) is 3 - 5L.

6. The automatic feeding and recycling device for girder plates according to claim 1, wherein The float device (3) includes a float (301), a sliding sleeve (302), an induction ring (303), and a guide rod (304) connected in sequence from bottom to top; The float (301) floats on the liquid surface and floats up and down with the liquid level; The sliding sleeve (302) connects the float (301) and the induction ring (303), allows the float (301) to move freely along the guide rod (304), and provides a certain frictional force to stabilize the position of the float (301); The induction ring (303) contains or adheres to an induction element, and triggers a signal when it moves to a specific position with the float (301); The guide rod (304) is vertically fixedly installed to provide guiding support for the entire float (301) assembly, ensuring that the float (301) and the induction ring (303) can move up and down smoothly.

7. The automatic feeding and circulating device for the girder slab according to claim 6, characterized in that, The induction switch (4) is an inductive or capacitive proximity switch.

8. The automatic feeding and recycling device for the girder slab according to claim 1, wherein The control unit (5) is provided with an adjustable time relay (6) capable of automatically starting and stopping the blanking device (1) at preset time intervals.

9. A control method for an automatic feeding and circulating device of a girder slab, characterized in that, Based on the girder plate automatic feeding circulation device according to any one of claims 1 - 8, it specifically includes the following steps: S1: Preset the feeding duration, feeding interval duration, and liquid level value in advance; S2: The float device (3) detects the liquid level height in the hopper (2), and the induction switch (4) transmits the liquid level information to the control unit (5); S3: After the control unit (5) receives the liquid level information, when the liquid level is lower than the set value, step S4 is executed; when the liquid level is higher than the set value, step S5 is executed; S4: The feeding device (1) starts to inject the adhesive liquid into the hopper (2). When the injection time of the adhesive material is equal to the set feeding duration, step S5 is executed; when the injection time of the adhesive material is less than the set feeding duration, step S2 is executed; S5: Stop feeding; S6: After the set feeding interval duration ends, execute S2.

10. The control method of the automatic feeding circulation device for the girder plate according to claim 9, characterized in that, In step S1, the feeding duration and the feeding interval duration are preset; among them, the feeding duration is comprehensively set according to the feeding capacity of the feeding device (1) per unit time and the capacity of the hopper (2), and the feeding interval duration is determined according to the minimum consumption cycle of the adhesive liquid during the actual processing; at the same time, the highest liquid level threshold and the lowest liquid level threshold in the hopper (2) are set to control the start and stop of feeding.

Images