A control system and control method for a curing kiln

Abstract

This application relates to the field of curing kiln technology, and provides a control system and control method for a curing kiln. The control module of this application controls the storage and retrieval mechanism to store one mold platform at the kiln inlet and retrieve another mold platform at the kiln outlet, realizing synchronous storage and retrieval. It also controls the opening of the heating valves on the steam pipes according to the temperature and humidity inside the kiln to regulate the temperature and humidity inside the kiln. Furthermore, before the kiln inlet and outlet doors are opened, at least two heating valves on the steam pipes are closed; after the kiln inlet and outlet doors are closed, at least two heating valves on the steam pipes are opened to compensate for the instantaneous heat loss at the kiln inlet and outlet doors. Moreover, the high-speed downward jet of steam from the steam pipes extending downward from the top of the kiln allows for the transfer of steam heat from top to bottom, ensuring that the temperature distribution on the same vertical plane inside the kiln meets the requirements of the curing process, thereby effectively improving the curing quality of precast concrete components.

Description

Technical Field

[0001] This application relates to the field of curing kiln technology, and in particular to a control system and control method for a curing kiln. Background Technology

[0002] In the building materials and construction industry, curing kilns are core equipment used to cure precast concrete components (PC components) at high temperatures and humidity to rapidly improve their strength.

[0003] In related technologies, the lack of coordination between the inlet and outlet doors of the curing kiln leads to uncoordinated movements of precast concrete components when entering and exiting the curing kiln. In addition, the environmental data control of the curing kiln is not intelligent enough, resulting in high steam consumption and low adaptability to environmental changes. Summary of the Invention

[0004] The main purpose of this application is to provide a control system and control method for a curing kiln, which can realize synchronous access and compensate for the instantaneous heat loss at the kiln inlet and outlet, thereby effectively improving the curing quality of precast concrete components.

[0005] In a first aspect, this application provides a control system for a curing kiln, the curing kiln including a kiln body, an inlet door, an outlet door, a mold platform, and a moving track. The inlet door and the outlet door are located on opposite sides of the kiln body. One end of the moving track is connected to the inlet door, and the other end of the moving track is connected to the outlet door. The moving track is capable of reciprocating between the inlet door and the outlet door. The moving track is used to transport the mold platform from the inlet door to the outlet door, and the mold platform is used to carry precast concrete components. The control system includes a storage and retrieval mechanism, a steam mechanism, an environmental monitoring module, and a control module. The storage and retrieval mechanism is located at the inlet door and the outlet door, and is used to store the mold platform at the inlet door and remove the mold platform from the outlet door. The steam mechanism includes a steam generator, a steam pipe, and a heating valve. One end of the steam pipe is connected to the steam generator, and the other end of the steam pipe extends downward from the top of the kiln body. The heating valve is located in the steam pipe, which is used to transport steam generated by the steam generator to the kiln body. The environmental detection module is located in the kiln body and is used to detect the temperature and humidity inside the kiln body. The control module is connected to the kiln inlet door, the kiln outlet door, the storage and retrieval mechanism, the steam mechanism, and the environmental detection module. The control module is used to control the heating valves of at least two steam pipes to close before the kiln inlet door and the kiln outlet door are opened. When the kiln inlet door is opened and the storage and retrieval mechanism is used to store the mold at the kiln inlet door, the kiln outlet door is opened and the storage and retrieval mechanism is used to remove another mold from the kiln outlet door. After the kiln inlet door and the kiln outlet door are closed, the control module controls the heating valves of at least two steam pipes to open and controls the opening degree of the heating valves according to the temperature and humidity inside the kiln body, so that the steam transported by the steam pipes can cure the precast concrete components on the mold.

[0006] Secondly, this application also provides a control method for a curing kiln, the control method being applied to the control system of the curing kiln as described in the first aspect, the control method comprising: Before the kiln inlet and the kiln outlet are opened, the heating valves of at least two steam pipes are closed. When the kiln door is opened and the mold is placed inside the kiln door, the kiln door is opened and another mold is taken out from the kiln door. After the kiln inlet and the kiln outlet are closed, the heating valves of the at least two steam pipes are opened. The opening degree of the heating valve is controlled according to the temperature and humidity inside the kiln so that the steam delivered by the steam pipe can cure the precast concrete components on the mold platform.

[0007] Thirdly, this application also provides a computer device, which includes a memory and a processor; The memory is used to store computer programs; The processor is used to execute the computer program and, when executing the computer program, to implement the control method of the curing kiln as described above.

[0008] Fourthly, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method for the curing kiln described above.

[0009] This application provides a control system and control method for a curing kiln. The curing kiln includes a kiln body, an inlet door, an outlet door, a mold platform, and a moving track. The inlet door and the outlet door are located on opposite sides of the kiln body. One end of the moving track is connected to the inlet door, and the other end is connected to the outlet door. The moving track can move back and forth between the inlet door and the outlet door. The moving track is used to transport the mold platform from the inlet door to the outlet door. The mold platform is used to carry precast concrete components. The control system includes a storage and retrieval mechanism, a steam mechanism, an environmental monitoring module, and a control module. The storage and retrieval mechanism is located at the inlet door and the outlet door. The storage and retrieval mechanism is used to store the mold platform at the inlet door and remove the mold platform from the outlet door. The steam mechanism includes a steam generator, a steam pipe, and a heating valve. One end of the steam pipe is connected to the steam generator, and the other end extends downward from the top of the kiln body. The heating valve is located in the steam pipe, which is used to transport steam generated by the steam generator to the kiln body. The environmental detection module is located in the kiln body and is used to detect the temperature and humidity inside the kiln body. The control module is connected to the kiln inlet door, the kiln outlet door, the storage and retrieval mechanism, the steam mechanism, and the environmental detection module. The control module is used to control the heating valves of at least two steam pipes to close before the kiln inlet door and the kiln outlet door are opened. When the kiln inlet door is opened and the storage and retrieval mechanism is used to store the mold at the kiln inlet door, the kiln outlet door is opened and the storage and retrieval mechanism is used to remove another mold from the kiln outlet door. After the kiln inlet door and the kiln outlet door are closed, the control module controls the heating valves of at least two steam pipes to open and controls the opening degree of the heating valves according to the temperature and humidity inside the kiln body, so that the steam transported by the steam pipes can cure the precast concrete components on the mold. The control module in this application controls the storage and retrieval mechanism to store one mold at the kiln inlet and retrieve another mold at the kiln outlet, achieving synchronous storage and retrieval. It also controls the opening of heating valves on the steam pipes based on the temperature and humidity inside the kiln to regulate these conditions. Furthermore, before the kiln inlet and outlet are opened, at least two heating valves on the steam pipes are closed; after the kiln inlet and outlet are closed, at least two more heating valves on the steam pipes are opened to compensate for the instantaneous heat loss at the kiln inlet and outlet. Moreover, the high-speed downward jet of steam from the steam pipes extending downwards from the top of the kiln ensures that the heat is transferred from top to bottom, guaranteeing that the temperature distribution on the same vertical plane within the kiln meets the requirements of the curing process, thereby effectively improving the curing quality of precast concrete components. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A schematic block diagram of a control system for a curing kiln provided in an embodiment of this application; Figure 2 A schematic diagram of the cross-sectional arrangement of the curing kiln in the height direction provided in the embodiments of this application; Figure 3 Another cross-sectional arrangement schematic diagram provided for an embodiment of this application; Figure 4 Temperature and humidity response curves in the curing kiln provided in the embodiments of this application; Figure 5 A schematic flowchart illustrating a method for controlling a curing kiln, as provided in an embodiment of this application; Figure 6 A schematic block diagram of the structure of a computer device provided in this application embodiment; The accompanying figure is labeled as follows: 10 Precast concrete components; 11 Kiln body, 12 Kiln inlet door, 13 Kiln outlet door, 14 Mold platform, 15 Moving track; 21 Storage and retrieval mechanism; 22 Steam mechanism, 221 Steam generator, 222 Steam pipeline, 223 Heating valve; 23 Environmental monitoring module; 24 Control module. Detailed Implementation

[0012] The technical problems with the relevant technologies include: 1. Uncoordinated kiln entry and exit actions: The opening actions of the kiln entry and exit doors in existing curing kilns are usually independent and lack coordination. Each door opening is accompanied by significant heat and moisture loss, causing a sharp drop in temperature in the kiln opening area, resulting in inconsistent strength of precast concrete components in different locations within the same batch. 2. Uneven temperature distribution: In multi-layered three-dimensional curing kilns, due to the principle of hot air rising, there is a natural temperature difference between upper and lower layers of the same cross-section in the kiln. Traditional single-point temperature measurement and single-loop control methods are difficult to meet the needs of different layers, resulting in large fluctuations in the quality of precast concrete components. 3. Crude temperature and humidity coupling control: Existing steam generators, heating valves, and atomizers are often controlled independently, which easily leads to phenomena such as "sufficient temperature but insufficient humidity" or "saturated humidity but insufficient temperature," affecting the early hydration and pore structure of precast concrete components. 4. Low energy efficiency: Existing curing kilns lack the ability to adapt to environmental changes, resulting in high steam consumption.

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0015] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0016] Please see Figures 1 to 3 ,in, Figure 1 This is a schematic block diagram of a control system for a curing kiln provided in an embodiment of this application.

[0017] like Figures 1 to 3 As shown, the curing kiln includes a kiln body 11, a kiln inlet door 12, a kiln outlet door 13, a mold platform 14, and a moving track 15. The kiln inlet door 12 and the kiln outlet door 13 are located on opposite sides of the kiln body 11. One end of the moving track 15 is connected to the kiln inlet door 12, and the other end of the moving track 15 is connected to the kiln outlet door 13. The moving track 15 can move back and forth between the kiln inlet door 12 and the kiln outlet door 13. The moving track 15 is used to transport the mold platform 14 from the kiln inlet door 12 to the kiln outlet door 13. The mold platform 14 is used to support precast concrete components.

[0018] The control system includes a storage and retrieval mechanism 21, a steam mechanism 22, an environmental monitoring module 23, and a control module 24. The storage and retrieval mechanism 21 is located at the kiln inlet door 12 and the kiln outlet door 13, and is used to store the mold 14 at the kiln inlet door 12 and to remove the mold 14 from the kiln outlet door 13. The steam mechanism 22 includes a steam generator 221, a steam pipe 222, and a heating valve 223. One end of the steam pipe 222 is connected to the steam generator 221, and the other end of the steam pipe 222 extends downward from the top of the kiln body 11. The heating valve 223 is located on the steam pipe 222, and the steam pipe 222 is used to transport the steam generated by the steam generator 221 into the kiln body 11. The environmental monitoring module 23 is located in the kiln body 11 and is used to monitor the temperature and humidity inside the kiln body 11. The control module 24 is connected to the kiln inlet door. 12. Kiln door 13, storage and retrieval mechanism 21, steam mechanism 22 and environmental detection module 23, control module 24 is used to control the heating valves 223 of at least two steam pipes 222 to close before the kiln door 12 and the kiln door 13 are opened; when the kiln door 12 is opened and the storage and retrieval mechanism 21 is used to store the mold 14 in the kiln door 12, the kiln door 13 is opened and the storage and retrieval mechanism 21 is used to remove another mold 14 from the kiln door 13; after the kiln door 12 and the kiln door 13 are closed, the heating valves 223 of at least two steam pipes 222 are controlled to open, and the opening degree of the heating valves 223 is controlled according to the temperature and humidity inside the kiln body 11, so that the steam transported by the steam pipes 222 can cure the precast concrete components 10 on the mold 14.

[0019] Specifically, in this embodiment, the kiln body 11 of the curing kiln can be composed of a steel structure outer frame and an insulated inner lining. The kiln inlet door 12 and the kiln outlet door 13 can be arranged opposite each other along the length of the kiln body 11; wherein, in this embodiment, the kiln inlet door 12 and the kiln outlet door 13 can include a liftable insulated soft curtain kiln door, a rigid high-speed roller shutter door, a flap-type sealing door, etc. Taking the liftable insulated soft curtain kiln door as an example, the control module 24 can drive the opening or closing of the insulated soft curtain kiln door by controlling the added electro-hydraulic lifting mechanism. Furthermore, in this embodiment, a position detection switch can also be set on the kiln inlet door 12 and the kiln outlet door 13 to detect whether the kiln inlet door and the kiln outlet door are fully open or closed.

[0020] In one embodiment, a detector with visual recognition function (not shown in the figure) can be added to the kiln door 12 to automatically identify whether there are precast concrete components 10 on the mold table 14, and whether the precast concrete components 10 have cracks or missing edges, thereby avoiding the situation of defective products entering the kiln or empty kiln operation.

[0021] The storage and retrieval mechanism 21 may include a palletizer, and the palletizer may adopt a wire rope-hoisting structure. For example, the same variable frequency servo motor may be used to drive the storage and retrieval mechanisms 21 set at the kiln inlet door 12 and the kiln outlet door 13 respectively via a distributor, so as to ensure that the speed of the wire rope at the kiln inlet door 12 and the kiln outlet door 13 is equal, thereby realizing the synchronization of "one mold table in, one mold table out".

[0022] For example, one end of the steam pipe 222 is connected to the steam generator 221, and the other end of the steam pipe 222 extends downward from the top of the kiln body 11. Steam generated by the steam generator 221 can be transported into the kiln body 11 through the steam pipe 222 and injected downward at high speed from the top of the kiln body 11 to break the thermal stratification of the airflow inside the kiln, promoting efficient downward heat transfer and ensuring that the temperature distribution of the same vertical cross-section within the kiln body 11 meets the requirements of the curing process. In this embodiment, the control module 24 adjusts the steam injected from the steam pipe 222 by controlling the opening of the heating valve 223, thereby regulating the temperature and humidity inside the kiln body 11 and achieving curing of the precast concrete components 10 on the mold platform 14.

[0023] The environmental detection module 23 may include a temperature sensor and a humidity sensor. In practical applications, the control module 24 may adjust the temperature and humidity inside the kiln 11 based on methods such as PID-fuzzy composite algorithm, neural network control, and model predictive control, according to the current temperature detected by the temperature sensor, the current humidity detected by the humidity sensor, the target temperature, and the target humidity, by controlling the opening of the heating valve 223, so as to achieve an actual temperature inside the kiln 11 that is close to the target temperature and an actual humidity that is close to the target humidity.

[0024] Taking the PID-fuzzy composite algorithm as an example, the control module 24 can output the opening degree of the heating valve 223 and the working parameters of the atomizer based on the PID-fuzzy composite algorithm, according to the deviation between the current temperature and the target temperature, the deviation between the current humidity and the target temperature, and the rate of change of the deviation.

[0025] For example, the control module 24 may consist of a programmable logic controller, a human-machine interface, an Ethernet module, and a host computer, and communicate with the enterprise's production management system via an industrial Ethernet network.

[0026] In some embodiments, the control module 24 can close the heating valves 223 on the steam pipes 222 near the kiln inlet door 12 and the kiln outlet door 13 at a preset time, such as 2 to 3 seconds, before the kiln inlet door 12 and the kiln outlet door 13 are opened; after the kiln inlet door 12 and the kiln outlet door 13 are closed, the heating valves 223 on the steam pipes 222 near the kiln inlet door 12 and the kiln outlet door 13 are opened after a preset time, such as 10 to 30 seconds, while the heating valves 223 on other steam pipes 222 remain open, in order to maintain the temperature of the core area, reduce the impact of opening the kiln inlet door 12 and the kiln outlet door 13 on the overall temperature field of the kiln body 11, and thus compensate for the instantaneous heat loss at the kiln inlet door 12 and the kiln outlet door 13.

[0027] In the control system of the curing kiln provided in the above embodiment, the control module 24 controls the storage and retrieval mechanism 21 to store one mold platform 14 to the kiln inlet door 12 and retrieve another mold platform 14 from the kiln outlet door 13, realizing synchronous storage and retrieval; and controls the opening of the heating valve 223 on the steam pipe 222 according to the temperature and humidity inside the kiln body 11 to adjust the temperature and humidity inside the kiln body 11; and before the kiln inlet door 12 and the kiln outlet door 13 are opened, the heating valve 223 of at least two steam pipes 222 are controlled to be closed, and after the kiln inlet door 12 and the kiln outlet door 13 are closed, the heating valve 223 of at least two steam pipes 222 are controlled to be opened to compensate for the instantaneous heat loss of the kiln inlet door 12 and the kiln outlet door 13; furthermore, the steam sprayed downward at high speed from the steam pipe 222 extending downward from the top of the kiln body 11 can transfer the steam heat from top to bottom, ensuring that the temperature distribution on the same vertical plane inside the kiln body 11 meets the requirements of the curing process, thereby effectively improving the curing quality of the precast concrete components 10.

[0028] In one exemplary implementation, such as Figure 2 and Figure 3 As shown, there are multiple moving tracks 15, which are arranged in an array along the length and height of the kiln body 11.

[0029] In this embodiment, multiple moving tracks 15 can be set up. The multiple moving tracks 15 are arranged at intervals along the length direction of the kiln body 11 and at intervals along the height direction of the kiln body 11, so as to form an array arrangement.

[0030] For example, the dimensions of the kiln body 11 can be set according to production needs, such as 60m in length × 5m in width × 8m in height. Of course, those skilled in the art can set the dimensions of the kiln body 11 according to actual conditions, and the dimensions of the kiln body 11 are not limited here.

[0031] Taking a kiln body 11 with dimensions of 60m long × 5m wide × 8m high as an example, four moving tracks 15 are arranged side by side along the height direction inside the kiln body 11. The height distance between the mold platforms 14 on two adjacent moving tracks 15 can be 0.45m to 0.50m. The axial heights of the four moving tracks 15 are 0.48m, 1.05m, 1.62m, and 2.19m above the reference plane, respectively. Each moving track 15 can be equipped with multiple guide support wheels to move the mold platform 14 between the kiln inlet 12 and the kiln outlet 13. Each guide support wheel has a load capacity of not less than 3.5T and can be made of surface-hardened steel forgings. The kiln body 11 with dimensions of 60m long × 5m wide × 8m high can accommodate 60 moving tracks 15 simultaneously, that is, 15 moving tracks 15 are arranged along the length direction of the kiln body 11 and 4 moving tracks 15 are arranged along the height direction in an array.

[0032] For example, the storage and retrieval mechanism 21 may include a palletizer, which can be configured with a 15×4 palletizing layout to match the arrangement of multiple moving tracks 15 arranged in an array. In practical applications, taking four moving tracks 15 in the height direction as an example, the palletizer can store four mold tables 14 on the four moving tracks 15 of the kiln door 12 respectively, thereby increasing the efficiency of production and curing of precast concrete components 10. In addition, the total weight of the four mold tables 14 palletized by the storage and retrieval mechanism 21 in the height direction does not exceed 20T×4=80T.

[0033] In one exemplary implementation, such as Figure 2 As shown, the kiln body 11 is provided with a heating zone, a constant temperature zone and a cooling zone. The kiln inlet 12 is located in the heating zone and the kiln outlet 13 is located in the cooling zone. During the process of the moving track 15 transporting the mold table 14 from the kiln inlet 12 to the kiln outlet 13, the mold table 14 passes through the heating zone, the constant temperature zone and the cooling zone in sequence.

[0034] For example, in this embodiment of the application, a heating zone, a constant temperature zone, and a cooling zone with a length ratio of approximately 3:5:2 can be sequentially provided along the length direction of the kiln body 11. When the storage and retrieval mechanism 21 stores the mold table 14 at the kiln door 12, the precast concrete component 10 on the mold table 14 passes through the heating zone, the constant temperature zone, and the cooling zone sequentially under the movement action of the moving track 15, so as to carry out high temperature and high humidity curing of the precast concrete component 10 on the mold table 14.

[0035] Multiple environmental detection modules 23, namely temperature sensors and humidity sensors, can be arranged along the height and length directions in the heating zone, constant temperature zone, and cooling zone, respectively. These multiple environmental detection modules 23 can be connected to the control module 24 via an RS-485 bus. For example,... Figure 2As shown, in this embodiment of the application, four environmental detection modules 23 can be arranged in the height direction and three environmental detection modules 23 can be arranged in the length direction to detect the temperature and humidity at different heights in the heating zone, the constant temperature zone and the cooling zone, respectively.

[0036] like Figure 4 As shown, the target temperature and target humidity differ for the heating zone, the constant temperature zone, and the cooling zone. Environmental monitoring modules 23, deployed in these zones, can collect temperature and humidity data in real time. The sampling period of the environmental monitoring modules 23 can also be set to reduce unnecessary data collection. For example, the sampling period of the environmental monitoring modules 23 can be set to 3 seconds.

[0037] In some implementations, the control module 24 can perform weighted fusion of temperature and humidity data collected by environmental detection modules 23 at different temperature zones and heights. For example, the weights corresponding to the temperature and humidity data collected by each environmental detection module 23 can be set according to the distance between the location of the environmental detection module 23 and the kiln inlet 12 or kiln outlet 13. It is understood that the closer the environmental detection module 23 is to the kiln inlet 12 or kiln outlet 13, the smaller the weight of the temperature and humidity data. This embodiment of the application dynamically adjusts the weights of temperature and humidity data collected at different locations based on their distance from the kiln inlet 12 or kiln outlet 13, effectively filtering out interference from the kiln opening and ensuring the accuracy of the collected temperature and humidity data. This allows the actual temperature and humidity in different temperature zones within the kiln body 11 to approach the target temperature and humidity in those zones.

[0038] The weight calculation formula in this embodiment is: W=D / (L 1 / 2); Where L is the total length of the kiln body 11; D is the distance between the location of the environmental detection module 23 and the kiln inlet door 12 or the kiln outlet door 13; W is the weight, which is less than or equal to D. When L is present, it indicates that the environmental detection module 23 is near the kiln inlet door 12 or the kiln outlet door 13.

[0039] For example, the control module 24 can pre-store the temperature and humidity target curves corresponding to different precast concrete components 10. For example, the precast concrete component 10 may include sandwich wall panels, double-leaf wall panels, and single-leaf wall panels. Taking the sandwich wall panel as an example, its temperature and humidity target curve consists of three segments: (a) heating segment - heating from an initial temperature of 20°C to 55°C at a rate of approximately 12°C / h, lasting approximately 3 hours; (b) constant temperature segment - maintaining a constant temperature of 55°C for 4 hours, with humidity maintained at 90%~95%; (c) cooling segment - cooling down to 30°C at a rate of approximately 8°C / h, lasting approximately 3 hours, with humidity maintained at 70%~80%.

[0040] In one exemplary embodiment, the steam pipe 222 includes a first steam pipe (not shown), a second steam pipe (not shown), and a third steam pipe (not shown), and the heating valve 223 includes a first heating valve (not shown), a second heating valve (not shown), and a third heating valve (not shown); the first steam pipe is located in the heating zone, the second steam pipe is located in the constant temperature zone, and the third steam pipe is located in the cooling zone. The control module 24 is used to adjust the temperature and humidity of the heating zone, the constant temperature zone, and the cooling zone by controlling the opening degree of the first heating valve, the second heating valve, and the third heating valve.

[0041] Specifically, the target temperature and target humidity differ in different temperature zones; therefore, the steam flow rate and temperature also differ in different temperature zones. For example, the steam pipe 222 in this embodiment may include a first steam pipe, a second steam pipe, and a third steam pipe, wherein the first steam pipe is located in the heating zone, the second steam pipe is located in the constant temperature zone, and the third steam pipe is located in the cooling zone. The control module 24 can gradually increase the temperature and humidity in the heating zone by controlling the opening degree of the first heating valve on the first steam pipe; can keep the temperature and humidity in the constant temperature zone constant by controlling the opening degree of the second heating valve on the second steam pipe; and can gradually decrease the temperature and humidity in the cooling zone by controlling the opening degree of the third heating valve on the third steam pipe.

[0042] In some embodiments, the control module 24 can control the first heating valve of the first steam pipe and the third heating valve of the third steam pipe to close and the second heating valve of the second steam pipe to open at a preset time before the kiln inlet door 12 and the kiln outlet door 13 are opened. After the kiln inlet door 12 and the kiln outlet door 13 are closed, the control module 24 can control the first heating valve and the third heating valve to open again after a preset time, and control the second heating valve to remain open. This can maintain the temperature of the core area inside the kiln body 11, reduce the impact of opening the kiln inlet door 12 and the kiln outlet door 13 on the overall temperature field of the kiln body 11, and thus compensate for the instantaneous heat loss at the kiln inlet door 12 and the kiln outlet door 13.

[0043] In some embodiments, when the mold 14 enters the cooling zone, the opening of the third heating valve can be adjusted to reduce the steam delivered to the cooling zone by the third steam pipe, thereby reducing the humidity of the precast concrete component 10 on the mold 14 first and then reducing the temperature, thus preventing condensation on the surface of the precast concrete component 10.

[0044] like Figure 2 As shown, each temperature zone can be equipped with two steam pipes 222, namely two first steam pipes, two second steam pipes, and two third steam pipes, to improve the flexibility of temperature and humidity regulation.

[0045] In one exemplary embodiment, the control system further includes an atomizer (not shown); the atomizer is disposed on the kiln body 11 and connected to the control module 24; the control module 24 is used to control the atomizer to turn on when the current humidity of the kiln body 11 is less than the target humidity, and to control the atomizer to turn off when the current humidity of the kiln body 11 is greater than or equal to the target humidity.

[0046] The atomizers in this embodiment can be arranged in different temperature zones of the kiln body 11 to achieve precise adjustment of humidity in different temperature zones. Specifically, the control module 24 can control the atomizer to turn on when the current humidity in the constant temperature zone of the kiln body 11 is lower than the target humidity, so that the current humidity in the constant temperature zone is close to the target humidity.

[0047] Specifically, before the atomizer is turned on, the heating valve 223 is already open to ensure the evaporation of moisture. In this embodiment, the atomizer can assist the steam mechanism 22 in replenishing water, thereby accurately regulating the humidity inside the kiln 11.

[0048] For example, the control module 24 can be based on a PID-fuzzy composite algorithm to output the steam flow rate of the steam generator 221, the opening degree of the heating valve 223, and the opening and closing of the atomizer according to the deviation between the current temperature and the target temperature, the deviation between the current humidity and the target temperature, and the rate of change of the deviation, so as to make the actual temperature of different temperature areas in the kiln body 11 close to the target temperature and the actual humidity close to the target humidity, thereby ensuring that the temperature difference of the same cross section in the kiln body 11 is not greater than ±5℃.

[0049] In one exemplary embodiment, the storage and retrieval mechanism 21 is provided with a first encoder (not shown) and a second encoder (not shown); the control system further includes a first displacement detection module (not shown) and a second displacement detection module (not shown). The first displacement detection module is located at the kiln inlet 12 and is connected to the control module 24. It is used to sense the signal of the first encoder to obtain the storage action data of the storage and retrieval mechanism 21 for storing the mold platform 14. The second displacement detection module is located at the kiln outlet 13 and is connected to the control module 24. It is used to sense the signal of the second encoder to obtain the retrieval action data of the storage and retrieval mechanism 21 for retrieving the mold platform 14. The control module 24 is used to control the storage and retrieval mechanism 21 according to the storage action data and the retrieval action data, so that when the mold platform 14 is stored at the kiln inlet 12, another mold platform 14 is retrieved from the kiln outlet 13.

[0050] For example, the first displacement detection module and the second displacement detection module in this application embodiment may include displacement sensors. In one embodiment, the first encoder of this application embodiment is disposed on the storage mechanism 21 and opposite to the kiln door 12, and the second encoder is disposed on the storage mechanism 21 and opposite to the kiln door 13. When the storage mechanism 21 stores the mold table 14 into the kiln door 12, the first displacement detection module disposed on the kiln door 12 can sense the storage action data of the storage mechanism 21 storing the mold table 14, so that the control module 24 can adjust the storage action of the storage mechanism 21 according to the storage action data; when the storage mechanism 21 removes the mold table 14 from the kiln door 13, the second displacement detection module disposed on the kiln door 13 can sense the removal action data of the storage mechanism 21 removing the mold table 14, so that the control module 24 can adjust the removal action of the storage mechanism 21 according to the removal action data. According to the storage action data obtained by the first displacement detection module sensing the signal of the first encoder and the retrieval action data obtained by the second displacement detection module sensing the signal of the second encoder, the control module 24 of this application embodiment can control the storage and retrieval mechanism 21 to perform storage and retrieval operations simultaneously, so as to realize that when the mold table 14 is stored in the kiln door 12, another mold table 14 is taken out from the kiln door 13.

[0051] In some implementations, the control module 24 can acquire curing data of each precast concrete component cured in the curing kiln, and based on a pre-trained regression model, adjust the heating slope, constant temperature, and constant temperature duration within the kiln body 11 according to the curing data. The curing data includes total steam consumption, electricity consumption, temperature, average initial temperature of the precast concrete component, post-curing strength, and pass rate.

[0052] For example, the training samples of the regression model in this embodiment may include historical curing data of precast concrete components 10 cured in different curing kilns, and kiln temperature labels (such as heating slope label, constant temperature label, and constant temperature duration label) of the precast concrete components 10 corresponding to the historical curing data. It is understood that after each training sample is input into the regression model, the kiln temperature results (such as heating slope, constant temperature, and constant temperature duration) corresponding to each historical curing data can be obtained. After calculating the difference between the kiln temperature results and the kiln temperature labels (such as heating slope and heating slope label, constant temperature and constant temperature label, and constant temperature duration and constant temperature duration label) according to a preset loss function, the model parameters of the regression model can be updated to reduce the difference between the kiln temperature results and the kiln temperature labels, making the predicted values ​​output by the regression model closer to the true values, thereby achieving the learning objective and improving the accuracy of the kiln temperature results output by the regression model. Specifically, based on a preset loss function, the difference between the kiln temperature result and the kiln temperature label can be calculated to obtain the loss value corresponding to the regression model. Then, the model parameters corresponding to the regression model can be updated according to the loss value to obtain the pre-trained regression model.

[0053] like Figure 4 As shown, the actual temperature curve B closely follows the target temperature curve A, and the actual humidity curve D closely follows the target humidity curve C. Using the curing kiln provided in this application embodiment, the temperature difference within the same kiln body per kiln cycle decreases from ±10℃ to within ±5℃, the 28-day strength variance of the precast concrete component 10 decreases from 3.5MPa to 1.6MPa, steam consumption per kiln cycle decreases by 11.6%, and the cycle time is shortened from 12 minutes to 10 minutes. The technical effects achieved by the curing kiln provided in this application embodiment include the following: 1. Energy saving and consumption reduction: Steam consumption per kiln is reduced by more than 10% compared with conventional processes (actual measurement shows a reduction of 11.6%).

[0054] 2. Quality Improvement: The temperature difference at the same cross section inside the kiln has been reduced from the conventional ±10℃ to within ±5℃; the standard deviation of the 28-day strength of the components has been reduced from 3.5MPa to 1.6MPa, resulting in more stable quality.

[0055] 3. Efficiency improvement: The overall kiln cycle time is shortened by 15%~25% (the measured cycle time is shortened from 12 minutes to 10 minutes).

[0056] 4. Control precision: It avoids temperature and humidity coupling imbalance, and the humidity in the constant temperature range can be stably maintained at over 90%.

[0057] Please see Figure 5 , Figure 5This is a flowchart illustrating a control method for a curing kiln provided in an embodiment of this application. The control method in this embodiment is applied to the control system of the curing kiln described above.

[0058] like Figure 5 As shown, the control method includes steps S101 to S104.

[0059] Step S101: Before opening the kiln inlet and outlet doors, control the heating valves of at least two steam pipes to close.

[0060] Step S102: When the kiln door is opened and the mold is stored at the kiln door, the kiln door is opened and another mold is taken out from the kiln door.

[0061] Step S103: After the kiln inlet and outlet doors are closed, control the opening of heating valves on at least two steam pipes.

[0062] Step S104: Control the opening of the heating valve according to the temperature and humidity inside the kiln so that the steam delivered by the steam pipe can cure the precast concrete components on the mold platform.

[0063] In an exemplary embodiment, the steam pipes include a first steam pipe, a second steam pipe, and a third steam pipe, and the heating valves include a first heating valve, a second heating valve, and a third heating valve; step S101 may include step S1011.

[0064] Step S1011: Before the kiln inlet and outlet doors are opened, control the first heating valve of the first steam pipe and the third heating valve of the third steam pipe to close, and the second heating valve of the second steam pipe to open.

[0065] Step S103 may include step S1031.

[0066] Step S1031: After the kiln inlet and outlet doors are closed, control the first heating valve and the third heating valve to open.

[0067] In one exemplary embodiment, the control method further includes step S201.

[0068] Step S201: When the mold enters the cooling zone, adjust the opening of the third heating valve to reduce the amount of steam delivered to the cooling zone by the third steam pipe.

[0069] In one exemplary embodiment, the control method further includes steps S301 and S302.

[0070] Step S301: Obtain curing data for each precast concrete component in the curing kiln. The curing data includes total steam consumption, electricity consumption, temperature, average initial temperature of the precast concrete component, strength after curing, and pass rate.

[0071] Step S302: Based on the pre-trained regression model and the curing data, adjust the heating slope, constant temperature, and constant temperature duration inside the kiln.

[0072] For example, the above-described methods and systems can be implemented as a computer program that can run on a computer device.

[0073] Please see Figure 6 , Figure 6 This is a schematic block diagram illustrating the structure of a computer device provided in an embodiment of this application. The computer device may be a server or a terminal device.

[0074] like Figure 6 As shown, the computer device includes a processor, a memory, and a network interface connected via a system bus, wherein the memory may include a storage medium and internal memory.

[0075] The storage medium may store an operating system and a computer program. The computer program includes program instructions that, when executed, cause the processor to perform the steps of any control method for the curing kiln.

[0076] The processor provides computing and control capabilities, supporting the operation of the entire computer device.

[0077] The internal memory provides an environment for the execution of computer programs stored in the storage medium. When the computer program is executed by the processor, it enables the processor to perform the steps of any control method for curing kilns.

[0078] This network interface is used for network communication, such as sending assigned tasks.

[0079] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0080] It should be understood that a processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other convertible logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0081] In one embodiment, the processor is configured to execute a computer program and, when executing the computer program, may perform the following steps: Before the kiln inlet and outlet doors are opened, the heating valves of at least two steam pipes must be closed. When the kiln door is opened and the mold is stored at the kiln door, the kiln door is opened and another mold is taken out from the kiln door. After the kiln inlet and outlet doors are closed, the heating valves controlling at least two steam pipes are opened; The opening of the heating valves is controlled according to the temperature and humidity inside the kiln so that the steam delivered by the steam pipe can cure the precast concrete components on the mold platform.

[0082] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of controlling the curing kiln described above can be referred to the corresponding process in the embodiments of the aforementioned curing kiln control method, and will not be repeated here.

[0083] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the following steps: Before the kiln inlet and outlet doors are opened, the heating valves of at least two steam pipes must be closed. When the kiln door is opened and the mold is stored at the kiln door, the kiln door is opened and another mold is taken out from the kiln door. After the kiln inlet and outlet doors are closed, the heating valves controlling at least two steam pipes are opened; The opening of the heating valves is controlled according to the temperature and humidity inside the kiln so that the steam delivered by the steam pipe can cure the precast concrete components on the mold platform.

[0084] The computer-readable storage medium can be an internal storage unit of the computer device described in the foregoing embodiments, such as a hard disk or memory of the computer device. Alternatively, it can be an external storage device of the computer device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., provided on the computer device.

[0085] It should be noted that the functions or steps that can be achieved by the computer-readable storage medium described above can be referred to the embodiments of the aforementioned methods.

[0086] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0087] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A control system for a curing kiln, characterized in that, The curing kiln includes a kiln body, an inlet door, an outlet door, a mold platform, and a moving track. The inlet door and the outlet door are located on opposite sides of the kiln body. One end of the moving track is connected to the inlet door, and the other end is connected to the outlet door. The moving track can move back and forth between the inlet door and the outlet door. The moving track is used to transport the mold platform from the inlet door to the outlet door. The mold platform is used to support precast concrete components. The control system includes: A storage and retrieval mechanism is provided at the kiln inlet and the kiln outlet, the storage and retrieval mechanism being used to store the mold table at the kiln inlet and to retrieve the mold table from the kiln outlet; The steam mechanism includes a steam generator, a steam pipe, and a heating valve. One end of the steam pipe is connected to the steam generator, and the other end of the steam pipe extends downward from the top of the kiln body. The heating valve is located on the steam pipe. The steam pipe is used to transport the steam generated by the steam generator into the kiln body. An environmental monitoring module is installed in the kiln body, and the environmental monitoring module is used to detect the temperature and humidity inside the kiln body; A control module is connected to the kiln inlet door, the kiln outlet door, the storage and retrieval mechanism, the steam mechanism, and the environmental detection module. The control module is used to close the heating valves of at least two steam pipes before the kiln inlet door and the kiln outlet door are opened; when the kiln inlet door is opened and the storage and retrieval mechanism stores the mold at the kiln inlet door, the kiln outlet door is opened and the storage and retrieval mechanism removes another mold from the kiln outlet door; after the kiln inlet door and the kiln outlet door are closed, the control module opens the heating valves of the at least two steam pipes; and, based on the temperature and humidity inside the kiln, controls the opening degree of the heating valves so that the steam transported by the steam pipes cures the precast concrete components on the mold.

2. The control system for the curing kiln according to claim 1, characterized in that, The kiln body is provided with a heating zone, a constant temperature zone and a cooling zone. The kiln inlet is located in the heating zone and the kiln outlet is located in the cooling zone. During the process of the moving track transporting the mold from the kiln inlet to the kiln outlet, the mold passes through the heating zone, the constant temperature zone and the cooling zone in sequence.

3. The control system for the curing kiln according to claim 2, characterized in that, The steam pipeline includes a first steam pipeline, a second steam pipeline, and a third steam pipeline, and the heating valve includes a first heating valve, a second heating valve, and a third heating valve; The first steam pipe is located in the heating zone, the second steam pipe is located in the constant temperature zone, and the third steam pipe is located in the cooling zone. The control module is used to adjust the temperature and humidity of the heating zone, the constant temperature zone, and the cooling zone by controlling the opening degree of the first heating valve, the second heating valve, and the third heating valve.

4. The control system for the curing kiln according to any one of claims 1 to 3, characterized in that, The number of moving tracks includes multiple tracks, which are arranged in an array along the length and height of the kiln body.

5. The control system for the curing kiln according to any one of claims 1 to 3, characterized in that, The control system further includes: An atomizer is installed in the kiln body, and the atomizer is connected to the control module; The control module is used to control the atomizer to turn on when the current humidity of the kiln body is less than the target humidity, and to control the atomizer to turn off when the current humidity of the kiln body is greater than or equal to the target humidity.

6. The control system for the curing kiln according to any one of claims 1 to 3, characterized in that, The access mechanism is equipped with a first encoder and a second encoder; the control system further includes: A first displacement detection module is located at the kiln door. The first displacement detection module is connected to the control module and is used to sense the signal of the first encoder in order to obtain the storage action data of the storage mechanism for storing the mold table. The second displacement detection module is located at the kiln door. The second displacement detection module is connected to the control module and is used to sense the signal of the second encoder to obtain the data of the retrieval action of the storage mechanism to retrieve the mold table. The control module is used to control the storage and retrieval mechanism according to the storage action data and the retrieval action data, so that when the mold is stored in the kiln door, another mold is taken out from the kiln door.

7. A method for controlling a curing kiln, characterized in that, The control method is applied to the control system of the curing kiln as described in any one of claims 1 to 6, and the control method includes: Before the kiln inlet and the kiln outlet are opened, the heating valves of at least two steam pipes are closed. When the kiln door is opened and the mold is placed inside the kiln door, the kiln door is opened and another mold is taken out from the kiln door. After the kiln inlet and the kiln outlet are closed, the heating valves of the at least two steam pipes are opened. The opening degree of the heating valve is controlled according to the temperature and humidity inside the kiln so that the steam delivered by the steam pipe can cure the precast concrete components on the mold platform.

8. The control method for the curing kiln according to claim 7, characterized in that, The steam pipelines include a first steam pipeline, a second steam pipeline, and a third steam pipeline; the heating valves include a first heating valve, a second heating valve, and a third heating valve; controlling the heating valves of at least two steam pipelines to close before the kiln inlet door and the kiln outlet door are opened includes: Before the kiln inlet and the kiln outlet are opened, the first heating valve of the first steam pipe and the third heating valve of the third steam pipe are closed, and the second heating valve of the second steam pipe is opened. After the kiln inlet and the kiln outlet are closed, controlling the opening of the heating valves of the at least two steam pipes includes: After the kiln inlet and the kiln outlet are closed, the first heating valve and the third heating valve are opened.

9. The control method for the curing kiln according to claim 8, characterized in that, The control method further includes: When the mold enters the cooling zone, the opening of the third heating valve is adjusted to reduce the amount of steam delivered to the cooling zone by the third steam pipe.

10. The control method for the curing kiln according to any one of claims 7 to 9, characterized in that, The control method further includes: Obtain curing data for each of the precast concrete components cured in the curing kiln. The curing data includes total steam consumption, electricity consumption, temperature, average initial temperature of the precast concrete component, strength after curing, and pass rate. Based on the pre-trained regression model and the maintenance data, the heating slope, constant temperature, and constant temperature duration within the kiln are adjusted.

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