Automatic circulation steam curing system

Abstract

The utility model discloses an automatic circulation steam curing system, relates to the technical field of concrete telegraph pole manufacturing, and solves the problem that high-temperature steam of steam curing equipment escapes and is not recycled after curing is completed. The system comprises a plurality of maintenance tanks, an air inlet pipe and a recovery pipe, the plurality of maintenance tanks are arranged side by side, the maintenance tanks are respectively connected with the air inlet pipe and the recovery pipe through independent maintenance pipes and air outlet pipes, and valves are correspondingly arranged on each maintenance pipe and each air outlet pipe of the system. On the basis, a steam circulating component is added and comprises a vacuum pump which is connected with an air inlet pipe and a recovery pipe through pipelines; through cooperative operation of the vacuum pump, the curing pipes on the different curing tanks and the valves on the air outlet pipes, steam completing curing in the curing tanks is pumped into the curing tanks needing steam curing through the vacuum pump, extra energy does not need to be wasted to generate new steam, and therefore closed-loop utilization of resources is achieved.

Description

Technical Field

[0001] This utility model relates to the field of concrete utility pole manufacturing technology, and in particular to an automatic circulating steam curing system. Background Technology

[0002] The manufacturing process of concrete utility poles involves many steps. After pouring, the concrete is cured by maintaining a proper humid environment to ensure that the concrete strength meets the standards.

[0003] Steam curing is a curing method that accelerates the cement hydration reaction in concrete through heating and humidification. It is commonly used in the production of precast concrete components, especially when a rapid increase in the early strength of concrete is required. The process involves gradually heating the concrete to 30-80°C in a controlled steam curing chamber while maintaining 100% humidity to accelerate the cement hydration reaction, typically resulting in a significant increase in concrete strength within hours to a day. Steam curing not only accelerates strength development and shortens the production cycle but also improves production efficiency, making it particularly suitable for large-scale production of precast components such as concrete utility poles. However, in practice, steam temperature and humidity must be strictly controlled to avoid cracking caused by excessive heat or insufficient humidity. Furthermore, the concrete needs to be cooled slowly after curing to prevent thermal stress caused by excessive temperature differences. Overall, steam curing can significantly improve the early strength of concrete and promote rapid production, but it requires highly precise temperature and humidity management. However, current steam curing equipment has a problem: the high-temperature steam is allowed to dissipate after curing without being recycled, which increases the cost for enterprises. If the steam could be recycled, the enterprise's curing costs could be reduced.

[0004] Therefore, it is necessary to design a circulating steam curing system to recycle the high-temperature steam after curing. Utility Model Content

[0005] To address the above shortcomings, this utility model provides an automatic circulating steam curing system that can recover and reuse the steam in the curing tank of the concrete utility pole after the steam curing process is completed during the manufacturing steam curing stage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic circulating steam curing system includes an inlet pipe, a curing pipe, a curing tank, valves, an outlet pipe, a recovery pipe, and steam circulation components;

[0008] There are multiple curing tanks, arranged side by side.

[0009] The air inlet pipe is connected to the steam generator. There are multiple sets of curing pipes. The curing pipe includes a first connecting pipe and an exhaust pipe. The exhaust pipe is set inside the curing tank. The first connecting pipe passes through the curing tank and is connected to the exhaust pipe. Multiple sets of curing pipes are set one-to-one in multiple curing tanks and are connected to the air inlet pipe through the first connecting pipe.

[0010] The recycling pipe is connected to the recycling container. There are multiple sets of vent pipes, including a connecting pipe and a second connecting pipe. The vent pipe is connected to the curing tank. The second connecting pipe is set on the connecting pipe and is connected to the vent pipe. Multiple sets of vent pipes are set on the curing tank one-to-one and are connected to the recycling pipe through the second connecting pipe.

[0011] There are multiple valves, which are installed one-to-one on multiple first connecting pipes and second connecting pipes;

[0012] The steam circulation component includes a third connecting pipe, a fourth connecting pipe, and a vacuum pump. One end of the third connecting pipe is installed at the outlet of the vacuum pump, and the other end is connected to the end of the inlet pipe away from the curing tank. One end of the fourth connecting pipe is installed at the inlet of the vacuum pump, and the other end is connected to the end of the recovery pipe away from the curing tank.

[0013] Preferably, it also includes an intelligent circulation system, which includes an intelligent controller and temperature and pressure sensors. There are multiple temperature and pressure sensors, which are installed one-to-one on multiple curing tanks with the sensor probes extending into the curing tanks. The multiple temperature and pressure sensors are electrically connected to the intelligent controller. The multiple valves are solenoid valves, which are electrically connected to the intelligent controller. The vacuum pump is electrically connected to the intelligent controller.

[0014] Preferably, it also includes a blower and a fifth connecting pipe, one end of which is installed at the air outlet of the blower, and the other end of which is connected to the end of the air inlet pipe away from the curing tank.

[0015] Preferably, it also includes air filters, and there are multiple air filters, which are arranged one-to-one in the lower part of the curing tank and connected to the curing tank.

[0016] Preferably, the exhaust pipe includes an upper exhaust pipe and a lower exhaust pipe, with the upper exhaust pipe located at the top of the curing tank and the lower exhaust pipe located at the bottom of the curing tank.

[0017] Preferably, the curing tank has an installation slot inside, and the exhaust pipe is embedded in the installation slot.

[0018] Preferably, the exhaust pipe is provided with exhaust holes, which are evenly arranged along the exhaust pipe and the exhaust direction of the exhaust holes faces the center of the exhaust pipe.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. The steam curing system includes curing tanks, inlet pipes, and recovery pipes. Multiple curing tanks are arranged side-by-side, connected to the inlet and recovery pipes via independent curing and outlet pipes. Each curing and outlet pipe has a corresponding valve. A steam circulation component, including a vacuum pump, is added. The vacuum pump is connected to the inlet and recovery pipes via pipelines. By coordinating the operation of the vacuum pump and the valves on the curing and outlet pipes of different curing tanks, steam that has completed curing in one tank is pumped into another tank requiring further steam curing. This design allows high-temperature steam to be quickly collected after curing and returned to the steam generator via the vacuum pump, eliminating the need to waste additional energy generating new steam and achieving closed-loop resource utilization.

[0021] 2. By adding an intelligent circulation system, precise monitoring and automated adjustment of the entire steam curing process are achieved, further improving the system's efficiency and reliability. The intelligent circulation system adds an intelligent controller, temperature and pressure sensors, and solenoid valves to the original system. The temperature and pressure sensors enable the system to monitor temperature and pressure changes within the curing tanks in real time, ensuring that the environment within the curing tanks always meets the optimal conditions for concrete curing. Multiple temperature and pressure sensors are installed one-to-one on multiple curing tanks, with sensor probes extending deep into the tanks to accurately sense the temperature and pressure status of each tank and transmit the data to the intelligent controller. The intelligent controller, as the system's central hub, receives and processes the data from the sensors and, based on the set curing parameters, performs precise electrical control of each valve and vacuum pump to achieve fully automated adjustment of steam distribution, discharge, and recovery.

[0022] 3. By comprehensively analyzing the monitoring data from various temperature and pressure sensors, the intelligent controller can promptly issue alarms and take automatic adjustment measures when abnormal conditions are detected (such as excessively high temperature or pressure, steam leakage, etc.), such as closing relevant solenoid valves or adjusting the operating status of the vacuum pump, thereby preventing system failure or damage to concrete components. Furthermore, the modular design of the intelligent circulation system facilitates subsequent maintenance and upgrades. Temperature and pressure sensors, solenoid valves, and the intelligent controller can all be replaced or optimized independently without requiring large-scale adjustments to the entire system, greatly reducing maintenance costs and downtime. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 In this utility model Figure 1Front view;

[0026] Figure 3 In this utility model Figure 1 Top view;

[0027] Figure 4 In this utility model Figure 1 A rearward oblique view;

[0028] Figure 5 This is a schematic diagram of the overall structure of the curing tank in this utility model;

[0029] Figure 6 In this utility model Figure 5 A cross-sectional view;

[0030] Figure 7 This is a schematic diagram of the overall structure of the maintenance pipeline in this utility model.

[0031] Reference numerals: 1. Curing tank; 101. Mounting tank; 2. Air inlet pipe; 3. Valve; 4. Curing pipe; 401. First connecting pipe; 402. Exhaust pipe; 4021. Upper exhaust pipe; 4022. Lower exhaust pipe; 403. Exhaust hole; 5. Air outlet pipe; 501. Second connecting pipe; 502. Connecting pipe; 6. Recovery pipe; 7. Steam circulation component; 701. Vacuum pump; 702. Third connecting pipe; 703. Fourth connecting pipe; 8. Temperature and pressure sensor; 9. Air filter; 10. Intelligent controller; 11. Blower; 12. Fifth connecting pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] To address the problem of high-temperature steam escaping unrecovered after steam curing in steam curing equipment, this invention provides an automatic circulating steam curing system, such as... Figures 1-7 As shown, this system includes an inlet pipe 2, a curing pipe 4, a curing tank 1, a valve 3, an outlet pipe 5, a recovery pipe 6, and a steam circulation component 7. The core of the system lies in the recycling of steam. Through scientific layout and precise control, a closed-loop circulation of steam is achieved between the curing tank 1 and the steam generator, thus achieving environmental protection and energy saving. The curing tank 1 is designed as multiple parallel structures, enabling the system to cure multiple concrete components simultaneously. These curing tanks 1 are connected to the inlet pipe 2 and the recovery pipe 6 via independent curing pipes 4 and outlet pipes 5, respectively. The curing pipe 4 includes a first connecting pipe 401 and an exhaust pipe 402. The exhaust pipe 402 is directly installed inside the curing tank 1 to evenly distribute steam and improve the curing effect. The first connecting pipe 401 passes through the curing tank 1 and connects to the exhaust pipe 402, allowing steam to be delivered from the inlet pipe 2 to each curing tank 1, meeting the curing needs of different components. Meanwhile, the exhaust pipe 5 includes a connecting pipe 502 and a second connecting pipe 501, which is responsible for guiding the used steam from the curing tank 1 to the recovery pipe 6 for further steam recovery and reuse. Multiple sets of curing pipes 4 and exhaust pipes 5 are arranged one-to-one in each curing tank 1, forming a steam flow network for the entire system through the intake pipe 2 and the recovery pipe 6, ensuring that each curing tank 1 can obtain a uniform and efficient steam supply.

[0036] To achieve precise control, the system is equipped with corresponding valves 3 on each of the first connecting pipes 401 and the second connecting pipes 501. The presence of valves 3 allows for greater flexibility in the flow, pressure, and distribution of steam. Users can adjust the steam input and output as needed, ensuring that the temperature and humidity within each curing tank 1 are always at their optimal levels, thereby maximizing the acceleration of the concrete hydration reaction. This design not only improves the early strength development speed of the concrete but also effectively reduces quality problems such as cracks caused by uneven temperature and humidity.

[0037] The key to the system lies in the design of the steam circulation component 7. The steam circulation component 7 comprises a third connecting pipe 702, a fourth connecting pipe 703, and a vacuum pump 701, forming a crucial link in steam recovery and reuse. One end of the third connecting pipe 702 is connected to the outlet of the vacuum pump 701, and the other end is connected to the far end of the inlet pipe 2, responsible for returning the recovered steam to the steam generator for heating and reuse. One end of the fourth connecting pipe 703 is installed at the inlet of the vacuum pump 701, and the other end is connected to the far end of the recovery pipe 6, used to pump the steam that has completed curing in the curing tank 1 into the curing tank 1 that still requires steam curing via the vacuum pump 701. This design allows high-temperature steam to be quickly collected after the curing task is completed and transported back to the steam generator by the vacuum pump 701, eliminating the need to waste additional energy to generate new steam, thus achieving closed-loop resource utilization.

[0038] This automated circulating steam curing system improves production efficiency while avoiding the adverse environmental impacts of direct high-temperature steam emissions. Furthermore, the system excels in energy consumption control; due to the high efficiency of steam recovery and reuse, the workload of the steam generator is reduced, significantly saving fuel costs. Overall, the advantages of this automated circulating steam curing system lie in its high efficiency, environmental friendliness, and energy conservation.

[0039] Secondly, its multi-slot parallel structure and independent steam pipeline design make it easier to expand production scale and flexibly meet the needs of different production tasks. Furthermore, the precise control of valve 3 further enhances the system's flexibility and adaptability, providing technical support for various maintenance needs. Most importantly, the steam circulation component 7 efficiently transmits the recovered steam back to the steam generator, achieving steam recycling, which not only saves energy but also reduces production costs, significantly improving the company's economic benefits. Such a system design has broad application prospects in the large-scale production of precast concrete components, especially in the rapid production of concrete utility poles.

[0040] In further optimization, to further unleash productivity and improve production efficiency, this device incorporates an intelligent circulation system. This enables precise monitoring and automated adjustment of the entire steam curing process, further enhancing system efficiency and reliability. The intelligent circulation system adds an intelligent controller 10, temperature and pressure sensors 8, and solenoid valves to the existing system. The temperature and pressure sensors 8 allow the system to monitor temperature and pressure changes within the curing tank 1 in real time, ensuring that the environment within the curing tank 1 always meets the optimal conditions for concrete curing. Multiple temperature and pressure sensors 8 are installed one-to-one on multiple curing tanks 1, with sensor probes extending into the tanks to accurately sense the temperature and pressure status of each tank and transmit the data to the intelligent controller 10. The intelligent controller 10, as the system's central hub, receives and processes the data from the sensors and, based on the set curing parameters, performs precise electrical control on each valve 3 and the vacuum pump 701 to achieve fully automated adjustment of steam distribution, discharge, and recovery.

[0041] In this optimized design, the traditional mechanical valve 3 is replaced by a solenoid valve, enabling the system to remotely control the steam flow and pressure distribution via the intelligent controller 10. Through the precise response of the solenoid valve, the system can dynamically adjust the steam input and output according to the actual needs of each curing tank 1, thereby achieving personalized curing of different concrete components. Simultaneously, the vacuum pump 701 is also electrically connected to the intelligent controller 10. Under the instructions of the intelligent controller 10, it can flexibly adjust the steam recovery speed and pressure, ensuring smooth steam transmission within the recovery pipe 6 and preventing energy waste due to steam accumulation or incomplete recovery. It can also be dynamically adjusted according to the temperature within each curing tank 1. For example, the steam temperature in tank 1 is displayed as 60 degrees Celsius, but needs to be adjusted to 70 degrees Celsius. At the same time, the steam temperature in tank 2 is displayed as 80 degrees Celsius, but needs to be adjusted to 70 degrees Celsius. The intelligent controller 10, through intelligent control, simultaneously opens the solenoid valve on the first connecting rod of tank 1 and the solenoid valve on the second connecting pipe 501 of tank 2, and starts the vacuum pump 701 to pump the steam in tank 2 into tank 1, thereby realizing dynamic temperature control of the steam in each curing tank 1. Similarly, dynamic pressure control can also be performed.

[0042] The introduction of the intelligent circulation system significantly improves the efficiency and flexibility of the entire curing system. Firstly, through real-time data acquisition and feedback from the temperature and pressure sensor 8, the temperature and humidity within the curing tank 1 can be precisely controlled, effectively preventing uneven concrete curing or quality problems caused by temperature and humidity deviations. Secondly, the use of the intelligent controller 10 not only simplifies the operation of the entire system but also lays the foundation for the automation and intelligence of large-scale curing operations. Through preset programs, the intelligent controller 10 can precisely control the curing time, temperature, and pressure of each tank according to the production plan, shortening manual operation time and reducing the risk of misoperation. Furthermore, the addition of the intelligent control system makes energy utilization more efficient. The system can adjust the steam supply according to the actual needs of the curing tank 1, avoiding unnecessary steam waste. Simultaneously, through optimized control of the vacuum pump 701, efficient steam recovery and recycling are achieved, significantly reducing the workload and fuel consumption of the steam generator.

[0043] Another advantage is that by comprehensively analyzing the monitoring data from each temperature and pressure sensor 8, the intelligent controller 10 can promptly issue alarms and take automatic adjustment measures when abnormal conditions are detected (such as excessively high temperature or pressure, steam leakage, etc.), such as closing relevant solenoid valves or adjusting the operating status of the vacuum pump 701, thereby preventing system failure or damage to concrete components. Furthermore, the modular design of the intelligent circulation system facilitates subsequent maintenance and upgrades. The temperature and pressure sensors 8, solenoid valves, and intelligent controller 10 can all be replaced or optimized independently without requiring large-scale adjustments to the entire system, greatly reducing maintenance costs and downtime.

[0044] Further optimization introduced a blower 11 and a fifth connecting pipe 12, forming a more complete steam and air circulation regulation mechanism. One end of the fifth connecting pipe 12 is connected to the air outlet of the blower 11, and the other end is connected to the end of the air inlet pipe 2 furthest from the curing tank 1. The main function of the blower 11 is to pump air into the air inlet pipe 2, thereby regulating the mixing of steam and air, making the ambient temperature in the curing tank 1 more uniform and closer to the optimal range for concrete curing. This improved design not only increases curing efficiency but also effectively solves the problems of temperature fluctuations or localized overheating that may occur in traditional curing processes.

[0045] In further optimization, to improve the efficiency and stability of the automatic circulating steam curing system, multiple air filters 9 were added. Each air filter 9 is installed at the bottom of the curing tank 1 and communicates with its interior. Its main function is to reduce the operating load of the vacuum pump 701 when pumping out residual steam from the curing tank 1 after steam curing, while simultaneously optimizing the steam discharge process. The introduction of air filters 9 effectively improves the problem of low steam discharge efficiency in traditional designs, making the system's steam circulation smoother. Air filters 9 ensure that the air entering the curing tank 1 is clean and uncontaminated by filtering impurities, avoiding potential damage to concrete components or system equipment from particulate matter. Furthermore, air filters 9 reduce steam flow resistance by adjusting airflow during steam pumping, making it easier for the vacuum pump 701 to discharge the steam. This design not only improves the working efficiency of the vacuum pump 701 but also effectively extends the service life of the equipment.

[0046] In further optimization, the structure of the vent pipe 402 was improved by adding a vent hole 403 and a double-layer layout of upper and lower vent pipes 4022 to ensure more uniform heating of the concrete components during curing. The vent holes 403 are evenly arranged along the vent pipe 402, with their exhaust direction facing the center of the vent pipe 402, allowing steam to diffuse evenly into the curing tank 1, effectively avoiding temperature differences caused by localized steam concentration. This design optimizes steam distribution and improves the uniformity and efficiency of curing.

[0047] The exhaust pipe 402 is divided into an upper exhaust pipe 4021 and a lower exhaust pipe 4022. The upper exhaust pipe 4021 is located at the top of the curing tank 1, while the lower exhaust pipe 4022 is installed at the bottom of the curing tank 1. This double-layer exhaust layout ensures that the concrete component is heated evenly on both the top and bottom surfaces, avoiding temperature gradients or uneven curing caused by insufficient steam supply on one side. This design is particularly important for larger or more complex-shaped concrete components.

[0048] In a further optimization, an installation groove 101 is added inside the curing tank 1 for the embedded installation of the exhaust pipe 402. This improvement significantly optimizes the internal space utilization of the curing tank 1, while ensuring more convenient placement and removal of concrete components. The design of the installation groove 101 allows the exhaust pipe 402 to be completely embedded in the groove, flush with the wall of the curing tank 1, avoiding the impact of the traditional exposed exhaust pipe 402 on the placement and operation space of concrete components. In addition, the embedded installation of the exhaust pipe 402 not only increases the usable space of the curing tank 1. The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automatic circulating steam curing system, characterized in that: It includes an air inlet pipe (2), a maintenance pipe (4), a maintenance tank (1), a valve (3), an air outlet pipe (5), a recovery pipe (6), and a steam circulation component (7); There are multiple curing tanks (1), and the multiple curing tanks (1) are arranged side by side; The air inlet pipe (2) is connected to the steam generator. There are multiple sets of the maintenance pipe (4). The maintenance pipe (4) includes a first connecting pipe (401) and an exhaust pipe (402). The exhaust pipe (402) is disposed inside the maintenance tank (1). The first connecting pipe (401) passes through the maintenance tank (1) and communicates with the exhaust pipe (402). Multiple sets of the maintenance pipe (4) are disposed one-to-one in multiple maintenance tanks (1) and communicate with the air inlet pipe (2) through the first connecting pipe (401). The recycling pipe (6) is connected to the recycling container. There are multiple sets of vent pipes (5). Each vent pipe (5) includes a connecting pipe (502) and a second connecting pipe (501). The vent pipe (5) is connected to the curing tank (1). The second connecting pipe (501) is set on the connecting pipe (502) and connected to the vent pipe (5). Multiple sets of vent pipes (5) are set one-to-one on the curing tank (1) and connected to the recycling pipe (6) through the second connecting pipe (501). There are multiple valves (3), which are installed one-to-one on multiple first connecting pipes (401) and second connecting pipes (501); The steam circulation component (7) includes a third connecting pipe (702), a fourth connecting pipe (703), and a vacuum pump (701). One end of the third connecting pipe (702) is installed at the outlet of the vacuum pump (701), and the other end is connected to the end of the inlet pipe (2) away from the curing tank (1). One end of the fourth connecting pipe (703) is installed at the inlet of the vacuum pump (701), and the other end is connected to the end of the recovery pipe (6) away from the curing tank (1).

2. The automatic circulating steam curing system according to claim 1, characterized in that: It also includes an intelligent circulation system, which includes an intelligent controller (10) and temperature and pressure sensors (8). There are multiple temperature and pressure sensors (8), which are installed one-to-one on multiple curing tanks (1) with the sensor probes extending into the curing tanks (1). The multiple temperature and pressure sensors (8) are electrically connected to the intelligent controller (10). The multiple valves (3) are solenoid valves, which are electrically connected to the intelligent controller (10). The vacuum pump (701) is electrically connected to the intelligent controller (10).

3. The automatic circulating steam curing system according to claim 1, characterized in that: It also includes a blower (11) and a fifth connecting pipe (12), one end of which is installed at the air outlet of the blower (11), and the other end is connected to the end of the air inlet pipe (2) away from the curing tank (1).

4. The automatic circulating steam curing system according to claim 1, characterized in that: It also includes air filters (9), there are multiple air filters (9), and the multiple air filters (9) are arranged one-to-one in the lower part of the maintenance tank (1) and connected to the maintenance tank (1).

5. The automatic circulating steam curing system according to claim 1, characterized in that: The exhaust pipe (402) includes an upper exhaust pipe (4021) and a lower exhaust pipe (4022). The upper exhaust pipe (4021) is located on the upper part of the curing tank (1), and the lower exhaust pipe (4022) is located on the lower part of the curing tank (1).

6. The automatic circulating steam curing system according to claim 1, characterized in that: The maintenance tank (1) is provided with an installation slot (101), and the exhaust pipe (402) is embedded in the installation slot (101).

7. The automatic circulating steam curing system according to claim 1, characterized in that: The exhaust pipe (402) is provided with exhaust holes (403), which are evenly arranged along the exhaust pipe (402), and the exhaust direction of the exhaust holes (403) faces the center of the exhaust pipe (402).

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