Sulphoaluminate cement concrete thermal excitation device and construction system

Abstract

The invention relates to a sulphoaluminate cement concrete thermal excitation device and construction system.The device comprises a low-pressure atomized gas generation unit arranged outside a stirring tank and provided with a valve, and the valve is provided with a low-pressure atomized gas outlet and a low-pressure atomized gas inlet; the temperature detection unit is arranged in the stirring tank, and the temperature detection unit is suitable for collecting the concrete temperature; and the intelligent control unit is in communication connection with the temperature detection unit and the valve, and the intelligent control unit controls the valve to be opened or closed according to the temperature detected by the temperature detection unit, so that the concrete temperature is maintained within a preset excitation temperature range. Through cooperative control of the temperature detection unit, the valve and the intelligent control unit, the temperature of the concrete is stably maintained in an optimal thermal excitation interval, and compared with traditional extensive heating, it can be ensured that the concrete is heated to a preset optimal excitation temperature window, so that rapid hardening of the concrete is triggered on the premise that flash setting is avoided, and the service life of the concrete is prolonged. And the construction efficiency and effect are ensured.

Description

Technical Field

[0001] This invention relates to the field of building construction equipment technology, specifically to a thermal activation device and construction system for sulfoaluminate cement concrete. Background Technology

[0002] Sulfoaluminate cement, with its excellent properties such as rapid hardening, early strength, micro-expansion, and corrosion resistance, has irreplaceable value in emergency projects such as military engineering, road and bridge repair, and building reinforcement. However, its inherent rapid hydration characteristics bring significant challenges in actual construction, especially in situations requiring pumping processes.

[0003] Existing technologies typically employ the addition of retarders to extend the setting time of sulfoaluminate cement, thus meeting the operational requirements of mixing, transportation, and pouring. However, in practical applications, the following challenging problems arise:

[0004] (1) The dosage of retarder is difficult to control precisely: sulfoaluminate cement has the characteristic of fast hardening. In order to cope with uncertain factors such as traffic congestion, the dosage of retarder must be sufficient. However, this can easily lead to excessive retarding, resulting in excessively long initial setting time of concrete, which cannot harden for several hours and completely loses its core value of "rapid repair".

[0005] (2) Lack of effective control measures: Once concrete fails to harden normally due to excessive slow setting, there are currently no fast, effective and reliable on-site intervention measures. We can only wait passively and miss the construction opportunity.

[0006] The "pre-retarded setting-post-activated setting" method for sulfoaluminate cement concrete, as an advanced construction concept, has proven to effectively resolve the conflict between pumping and early strength. However, the successful implementation of this method highly depends on a set of efficient and reliable on-site activation equipment. Currently, such specialized equipment is lacking in the market.

[0007] Using conventional heating methods presents several problems:

[0008] (1) Uneven heating: Using a simple hot air gun or external heating can cause local overheating and flash setting of concrete, while the internal structure remains unactivated, resulting in quality accidents.

[0009] (2) Poor control precision: The lack of precise temperature feedback and control makes it easy for the concrete to lose its workability in the pump truck tank due to overheating, resulting in serious equipment blockage and loss.

[0010] (3) Low integration: The temporary heating system is difficult to work in coordination with the pump truck, the operation is cumbersome, and it cannot meet the efficiency requirements of the emergency repair project.

[0011] (4) No safety guarantee: There is no interlock protection mechanism. It is extremely risky to continue heating in abnormal situations such as when stirring stops.

[0012] Therefore, there is an urgent need in this field for a field thermal excitation device with precise temperature control specifically designed for sulfoaluminate cement concrete. Summary of the Invention

[0013] In view of the above-mentioned defects or deficiencies in the prior art, the present invention proposes a thermal activation device, method and storage construction system for sulfoaluminate cement concrete.

[0014] This invention provides a thermal activation device for sulfoaluminate cement concrete, comprising: a low-pressure atomizing gas generating unit disposed outside a mixing tank, wherein the low-pressure atomizing gas generating unit is equipped with a valve, the valve...

[0015] It is equipped with a low-pressure atomizing gas outlet and a low-pressure atomizing gas inlet; a temperature detection unit is located inside the mixing tank, which is suitable for collecting concrete temperature; an intelligent control unit is communicatively connected to the temperature detection unit and the valve, which controls the valve to open or close according to the temperature detected by the temperature detection unit, so as to maintain the concrete temperature within the preset activation temperature range.

[0016] In an optional embodiment, the sulfoaluminate cement concrete thermal activation device further includes a stirring controller adapted to control the start or stop of the stirring action of the mixing tank. The stirring controller is communicatively connected to the intelligent control unit and is configured to control the valve to open to deliver low-pressure atomized gas when the stirring controller controls the stirring action in the mixing tank to start.

[0017] In one optional embodiment, the low-pressure atomizing gas delivery and uniform distribution unit includes: an annular delivery pipeline disposed on the inner wall of the stirring tube; and low-pressure atomizing gas nozzles uniformly disposed on the annular delivery pipeline.

[0018] In one alternative implementation, the orientation of the low-pressure atomizing gas nozzle is optimized using computational fluid dynamics simulation.

[0019] In one optional embodiment, the temperature detection unit includes a plurality of temperature sensors disposed inside the wall of the mixing tank.

[0020] In one optional embodiment, the mixing tank is provided with a stirring device, which includes a stirring rod and stirring blades, and the temperature sensor is also provided inside the stirring rod.

[0021] In one optional implementation, the intelligent control unit includes a human-machine interface for setting the target temperature, viewing real-time curves, and alarm information.

[0022] In one alternative embodiment, the target excitation temperature range for sulfoaluminate cement concrete is 24°C to 26°C; the temperature range for low-pressure atomizing gas is 25°C to 30°C; and the gauge pressure range for low-pressure atomizing gas is 0.1 MPa to 0.7 MPa.

[0023] The present invention also proposes a construction system, including an on-site thermally activated concrete pump truck, wherein the on-site thermally activated concrete pump truck integrates the thermally activated sulfoaluminate cement concrete device described in any one of the claims.

[0024] The beneficial technical effects of this invention are as follows: through the coordinated control of the temperature detection unit, valve and intelligent control unit, the concrete temperature can be stably maintained in the optimal thermal activation range. Compared with the traditional "extensive" low-pressure atomized gas heating, it can ensure that the concrete is heated to the preset optimal activation temperature window, thereby triggering its rapid hardening without flash solidification, ensuring construction efficiency and construction effect. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a front view of the thermal activation device for sulfoaluminate cement concrete provided in an embodiment of the present invention;

[0027] Figure 2 A front view of the mixing tank of the thermal activation device for sulfoaluminate cement concrete provided in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 Schematic diagram of the AA-direction cross-section structure;

[0029] Figure 4 for Figure 3 Enlarged structural diagram at point II;

[0030] Figure 5 for Figure 3 Enlarged structural diagram at point III;

[0031] Figure 6 This is a partial three-dimensional structural diagram of the construction system provided in an embodiment of the present invention;

[0032] Figure 7 A flowchart of a thermal activation method for sulfoaluminate cement concrete provided in an embodiment of the present invention.

[0033] The markings in the diagram indicate: 1. Low-pressure atomizing gas generating unit; 2. Stirring tank; 21. Circular delivery pipeline; 22. Low-pressure atomizing gas nozzle; 23. Blade; 3. Temperature sensor; 4. Fixed rod; 5. Movable rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1 to 7 The present application will be further described in detail with reference to the embodiments. It is understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Please refer to Figure 1 and Figure 2 This invention provides a thermal activation device for sulfoaluminate cement concrete, comprising: a low-pressure atomizing gas generating unit 1, located outside a mixing tank 2, the low-pressure atomizing gas generating unit 1 having a valve with a low-pressure atomizing gas outlet and a low-pressure atomizing gas inlet; a low-pressure atomizing gas conveying and uniform distribution unit, located inside the mixing tank 2, for uniformly spraying low-pressure atomizing gas into the mixing tank 2, and the low-pressure atomizing gas conveying and uniform distribution unit being connected to the low-pressure atomizing gas inlet; a temperature detection unit, located inside the mixing tank 2, the temperature detection unit being adapted to collect concrete temperature; and an intelligent control unit, communicatively connected to the temperature detection unit and the valve, the intelligent control unit controlling the valve to open or close according to the temperature detected by the temperature detection unit, so as to maintain the concrete temperature within a preset activation temperature range.

[0037] In this embodiment, the low-pressure atomizing gas generating unit 1 is a small, fast-start electrically heated low-pressure atomizing gas generator with a rated operating pressure of 0.8 MPa. The gas production capacity can be customized according to the tank capacity. A pressure reducing valve is provided at the outlet to stabilize the low-pressure atomizing gas pressure within a safe range of 0.2-0.5 MPa.

[0038] The unit employs an electrically heated low-pressure atomizing gas generator (or a gas-heated type, adaptable to site energy conditions). The unit is equipped with an electromagnetic proportional regulating valve. Its low-pressure atomizing gas inlet is connected to the main low-pressure atomizing gas pipe of the generator via a flange seal, while the low-pressure atomizing gas outlet is connected to the subsequent delivery unit via a high-temperature resistant rubber hose. The valve incorporates a pressure sensor and flow controller, providing real-time feedback on the low-pressure atomizing gas delivery volume and supporting intelligent control. Low-pressure atomizing gas delivery and... The uniform distribution unit can be made of 304 stainless steel (corrosion resistant and low thermal conductivity, reducing condensation of atomized gas along the way).

[0039] The temperature detection unit uses a PT100 platinum resistance temperature sensor 3 (measuring range -50℃ to 200℃, accuracy ±0.5℃). There are no fewer than 3 sensors, which are installed in different areas inside the mixing tank 2. The sensor probes are wrapped with polytetrafluoroethylene protective sleeves (corrosion-proof and wear-proof) and connected to the signal acquisition module of the intelligent control unit through high-temperature resistant wires. This enables multi-point, real-time, and comprehensive temperature monitoring of the concrete slurry, avoiding temperature misjudgment caused by single-point temperature measurement.

[0040] The intelligent control unit is based on a PLC controller and can be equipped with a 7-inch touch screen (supporting manual / automatic mode switching). Its core functions include: temperature threshold setting: users can set the optimal excitation target temperature range (usually 24℃-26℃) according to the model of sulfoaluminate cement (such as 42.5R, 52.5R).

[0041] When the average value of multiple temperature sensors 3 is lower than the preset lower limit (e.g., 24℃), the controller sends a signal to the electromagnetic proportional regulating valve to increase the valve opening (up to 100%) and increase the low-pressure atomized gas delivery volume; when the average value is higher than the preset upper limit (e.g., 26℃), the valve opening decreases (minimum 0%) and the low-pressure atomized gas supply is stopped; if the temperature deviation at a single point exceeds ±3℃, the controller will also trigger the stirring speed of the stirring tank 2 to be finely adjusted (±10r / min) to assist in temperature uniformity.

[0042] It automatically stores temperature change curves and valve action records for 24 hours. When the temperature exceeds the safe range (e.g., ≥30℃ or ≤5℃) or the sensor / valve malfunctions, it alerts the operator through audible and visual alarms and automatically cuts off the supply of low-pressure atomized gas to ensure the safety of the equipment and concrete quality.

[0043] By using multi-point temperature monitoring and electromagnetic proportional valves for coordinated control, the concrete temperature can be stably maintained within the optimal thermal activation range. Compared with traditional "extensive" low-pressure atomized gas heating (temperature fluctuation ±10℃), it can activate rapid hardening without flash condensation, ensuring construction efficiency and effectiveness.

[0044] The PLC controller enables fully automatic operation of "temperature detection - valve adjustment - fault alarm".

[0045] No real-time monitoring or manual adjustment is required, reducing labor costs. Furthermore, by employing an "on-demand steam supply" logic (non-continuous full-load steam supply), it reduces low-pressure atomized gas consumption compared to constant-pressure low-pressure atomized gas heating. The equipment incorporates multiple safety designs, including over-limit temperature protection, automatic shutdown in case of malfunction, and anti-slurry backflow prevention, effectively preventing concrete quality defects or equipment damage (such as pipe blockage or valve burnout) caused by temperature runaway. This reduces the incidence of production failures and improves production stability.

[0046] Furthermore, the thermal activation device for sulfoaluminate cement concrete also includes a stirring controller, which is adapted to control the start or stop of the stirring action of the mixing tank 2. The stirring controller is communicatively connected to the intelligent control unit and is configured to control the valve to open to deliver low-pressure atomized gas when the stirring action in the mixing tank 2 is started by the stirring controller.

[0047] In this embodiment, the low-pressure atomizing gas generating unit 1 is allowed to supply low-pressure atomizing gas to the delivery pipeline only when the rotating blades 23 of the concrete pump truck's fixed mixing tank 2 are in operation.

[0048] The mixing controller, based on a microprocessor, integrates a mixing motor drive module, an operation status monitoring module, and a communication module, enabling full-process control of the mixing action in the mixing tank 2, from start to speed adjustment to stop. Its core control object is the mixing motor of the rotating blades 23 on the inner wall of the fixed mixing tank 2 of the concrete pump truck. A motor current sensor (measurement accuracy ±0.1A) collects the operating current of the mixing motor in real time. For example, when the current is between 15-30A (corresponding to the normal operating speed of the motor 15-20 r / min), the mixing action is determined to be in "operating state"; when the current is ≤5A (motor stopped) or ≥40A (motor overload), it is determined to be in "non-operating state," and the status signal is transmitted to the intelligent control unit in real time. The mixing controller has a built-in "mixing-low-pressure atomized gas" linkage program. It only sends a "steam supply allowed" signal to the intelligent control unit when the mixing motor is detected to be in "operating state"; if the mixing motor stops or is overloaded, it immediately sends a "steam supply prohibited" signal, forcibly cutting off the low-pressure atomized gas supply link. It can also be equipped with independent manual control buttons (start / stop / emergency stop). When the intelligent control unit fails, the operator can directly control the start and stop of the stirring motor through the button, and at the same time manually switch the "allow / disallow" state of the low-pressure atomizing gas supply valve to ensure emergency production needs.

[0049] After receiving the status signal from the mixing controller, the intelligent control unit triggers the corresponding low-pressure atomized gas supply logic, forming a closed-loop control of "mixing action - low-pressure atomized gas supply". Steam is supplied only when the mixing action is started. The rotation of blade 23 can quickly and evenly mix the low-pressure atomized gas with the concrete slurry, completely solving the problem of low-pressure atomized gas rising and accumulating (forming a high-temperature zone at the top of the tank, with the upper layer of the slurry overheated and the lower layer unheated) caused by "steam supply when the mixer is stopped". The temperature uniformity of the concrete can be further improved.

[0050] When the agitator stops, the supply of low-pressure atomized gas is automatically cut off, which avoids the waste of the traditional "continuous delivery of low-pressure atomized gas" mode (such as the wasteful discharge of low-pressure atomized gas during the agitation interval). At the same time, it prevents high-temperature low-pressure atomized gas from contacting the tank wall for a long time when there is no agitation, reduces thermal stress damage to the tank wall caused by local overheating, and extends the service life of the agitator tank 2.

[0051] By using hardware linkage (stirring motor running = steam supply allowed) to replace manual judgment, operator errors (such as forgetting to start the agitator before turning on the low-pressure atomizer or failing to turn off the low-pressure atomizer after the agitator stops) are avoided, further improving production stability.

[0052] Furthermore, such as Figure 2 As shown, the low-pressure atomizing gas delivery and uniform distribution unit includes: an annular delivery pipeline 21, which is located on the inner wall of the stirring tube; and steam nozzles, which are uniformly located on the annular delivery pipeline 21.

[0053] The annular delivery pipeline 21, serving as the core carrier for low-pressure atomizing gas distribution, is made of seamless 304 stainless steel tubing (32mm outer diameter, 3mm wall thickness). Its dimensions and installation method are strictly adapted to the inner wall structure of the mixing tank 2. The diameter of the annular pipeline ensures a preset distance between the pipeline and the tank wall, such as 50mm-80mm, preventing collisions when the mixing blades 23 rotate while covering most of the mixing area inside the tank. The annular pipeline is fixed to the inner wall of the mixing tank 2 by an arc-shaped stainless steel bracket. The bracket is welded to the tank wall and bolted to the pipeline for easy detachment (facilitating future maintenance and replacement). The outer surface of the pipeline is coated with a high-temperature resistant ceramic coating, which reduces heat loss of the low-pressure atomizing gas inside the pipeline and prevents concrete slurry from adhering and solidifying, thus preventing pipeline blockage. Nozzles are evenly arranged along the circumference of the annular delivery pipeline 21, for example, with a spacing of 80-100mm between adjacent nozzles, ensuring that the fan-shaped spray areas of all nozzles are interconnected and cover the concrete mixing area inside the mixing tank 2 without any dead angles.

[0054] Furthermore, the orientation of the low-pressure atomizing gas nozzle 22 was optimized through computational fluid dynamics simulation.

[0055] Comparative CFD simulation data shows that a 45° downward angle exhibits optimal performance. Specifically, when sprayed at a 45° angle, the low-pressure atomized gas achieves a fan-shaped diffusion angle of 60°-70°, covering 80% of the gap area between adjacent nozzles with no obvious uncovered dead zones. Compared to 30° (diffusion angle only 40°-50°), the coverage area is increased by 35%, and compared to 60° (although the diffusion angle is large, it tends to directly hit the bottom of the tank), the heat loss at the bottom of the tank is reduced by 20%. The average residence time of the low-pressure atomized gas in the slurry is 1.2-1.5s, which is 30% longer than at 30° (0.8-1.0s, where the low-pressure atomized gas tends to float and dissipate) and 25% longer than at 60° (0.9-1.1s, where the low-pressure atomized gas tends to quickly pass through the slurry), providing more time for heat exchange.

[0056] The spray direction of adjacent nozzles is designed to "alternately offset clockwise by 5°" along the circumference of the annular pipeline, which further eliminates the local vortex blind zone caused by the rotation of the stirring blades 23 and ensures uniform mixing throughout the tank.

[0057] An annular tube made of heat-resistant stainless steel is led out from the low-pressure atomizing gas generating unit 1 and fixed to the inner wall of the mixing tank 2 via a bracket. A set of miniature low-pressure atomizing gas nozzles 22 are installed on the annular tube at regular intervals. The nozzle direction is optimized by CFD simulation to ensure that the low-pressure atomizing gas can be fully mixed with the concrete thrown down by the mixing blades 23 after it is sprayed out.

[0058] The CFD-optimized 45° nozzle direction improves the heat exchange efficiency between low-pressure atomized gas and slurry, with almost no waste of low-pressure atomized gas heat. The optimized nozzle direction avoids the problem of "low-pressure atomized gas accumulation caused by localized eddies" in traditional empirical designs, reducing temperature deviations at various points within the slurry. CFD simulations covered different stirring speeds and slurry viscosities (600-1500 mPa·s), and the optimized 45° nozzle direction maintained excellent mixing performance under all conditions. Compared to traditional fixed-direction nozzles (suitable only for a single condition), it is compatible with concrete production using different proportions of sulfoaluminate cement (such as those with fly ash or mineral powder). The impact force of the low-pressure atomized gas injected at 45° and the rotational force of the stirring blades 23 create a "synergistic force," resulting in a smoother flow velocity distribution within the slurry.

[0059] Furthermore, the temperature detection unit includes multiple temperature sensors 3, which are located inside the wall of the mixing tank 2.

[0060] Furthermore, such as Figure 3 and Figure 4 As shown, the mixing tank 2 is equipped with a mixing device, which includes a mixing rod and mixing blades 23. Temperature sensors 3 are also located inside the mixing rod. Multiple temperature sensors 3 are installed inside the wall of the mixing tank 2 or inside the fixing rod 4 of the rotating blades 23, and are used to monitor the average and minimum temperatures of the concrete.

[0061] Temperature sensors 3 are embedded in the wall of mixing tank 2 and in the mixing rod (rotating blade 23 fixed rod 4), covering the surrounding area of ​​the tank wall and penetrating into the core mixing zone of the slurry. Compared with the traditional method of only arranging sensors at a single point inside the tank or on the surface, this method achieves "edge-core" dual-area monitoring, which can simultaneously capture the overall distribution of concrete and avoid temperature misjudgment due to limited location.

[0062] By using multiple sensors to collaboratively monitor the average and minimum temperatures of the concrete, the overall thermal activation state can be assessed, and the weakest areas with the lowest temperatures (such as areas near the tank wall that are prone to heat dissipation) can be identified. The intelligent control unit can then adjust the supply of low-pressure atomized gas accordingly (such as increasing the amount of low-pressure atomized gas to nozzles corresponding to low-temperature zones) to ensure that there are no localized issues with substandard concrete temperatures and improve the uniformity of thermal activation.

[0063] The sensors are embedded in the tank wall and inside the mixing rod, rather than being directly exposed in the concrete slurry. This avoids sensor wear or damage caused by slurry erosion and aggregate friction, extending their service life. It also reduces malfunctions caused by slurry seeping into the sensor interface, lowering equipment maintenance frequency. The mixing rod rotates continuously with the mixing action, allowing the sensors inside to contact different areas of the concrete in real time. Compared to sensors fixed to the tank wall, this increases the frequency of temperature data updates, enabling faster detection of slurry temperature changes (such as sudden temperature rises due to excessive localized low-pressure atomized gas or sudden temperature drops due to cold air introduced during mixing). This allows the intelligent control unit to shorten response times and prevent temperature fluctuations from exceeding preset ranges.

[0064] Furthermore, such as Figure 5 As shown, the stirring rod includes a fixed rod 4 and a movable rod 5. The movable rod 5 is sleeved on the outside of the fixed rod 4 and is located on the stirring blade 23. The temperature sensor 3 is located inside the fixed rod 4.

[0065] Temperature sensor 3 is placed inside fixed rod 4, completely avoiding vibration and centrifugal force interference caused by the rotation of movable rod 5, and also avoiding direct contact with concrete slurry, reducing temperature data fluctuations, and accurately reflecting the true temperature of the core area of ​​concrete.

[0066] The movable rod 5 independently undertakes the task of rotating and stirring the stirring blade 23, while the fixed rod 4 only serves as a sensor carrier and remains stationary. The two are separated by a sleeve structure, which not only avoids damage to the sensor due to the stirring action, but also prevents the sensor wiring from getting tangled and affecting the stirring efficiency, thus reducing the overall failure rate of the equipment.

[0067] The sensor inside the fixed rod 4 does not come into contact with the slurry scouring or aggregate friction, and the sealing structure between it and the movable rod 5 (such as a wear-resistant sealing ring) can prevent slurry from seeping in; at the same time, there is no need to disassemble the mixing blade 23 during maintenance, and it can be inspected only from the end of the fixed rod 4, which shortens the maintenance time per operation.

[0068] The intelligent control unit includes a temperature sensor 3 for monitoring concrete temperature, a programmable logic controller (PLC) integrated into the concrete pump truck cab, and a human-machine interface.

[0069] The intelligent control unit includes a human-machine interface (HMI) for setting the target temperature, viewing real-time curves, and alarm information. The HMI includes a touchscreen for setting the target temperature, viewing real-time curves, and alarm information. The programmable controller is configured to control the opening and closing of the valve of the low-pressure atomizing gas generating unit 1 based on the feedback signal from the temperature sensor 3, so as to maintain the concrete temperature within the preset activation temperature range.

[0070] The target excitation temperature range is 24°C to 26°C, and the temperature range of the low-pressure atomizing gas is 25°C to 30°C.

[0071] The activation temperature range is locked between 24℃ and 26℃, with a maximum temperature limited to 30℃. This range is considered the "golden range" for the thermal activation reaction of sulfoaluminate cement with excessive retarder addition—below 24℃, thermal activation is slow, resulting in excessively long initial setting time for concrete; above 30℃, the hydration reaction is rapidly activated, leading to insufficient concrete construction window. The programmable controller ensures proper concrete activation temperature through closed-loop temperature control.

[0072] The programmable controller automatically opens and closes the low-pressure atomizing gas valve based on real-time feedback from temperature sensor 3, eliminating the need for manual judgment on "when to open / close the low-pressure atomizing gas". Compared with traditional manual temperature control (which is prone to temperature fluctuations of ±5℃-8℃ due to experience differences), it can stabilize the temperature control accuracy within ±1℃, completely eliminating the risk of "overheating" or "underheating" caused by manual operation, and improving the consistency of concrete quality by 40%.

[0073] The controller only opens the valve to supply steam when the concrete temperature is below 24℃ and closes the valve to cut off steam when it is above 26℃, avoiding energy waste caused by continuous low-pressure atomized gas supply. Calculations show that compared to "extensive steam supply" without a fixed temperature range, this temperature control logic can reduce low-pressure atomized gas consumption by 20%-25%. Based on a daily concrete production of 500 cubic meters, this translates to annual savings of approximately 80,000-120,000 yuan in low-pressure atomized gas costs.

[0074] The low-pressure atomizing gas generated by the low-pressure atomizing gas generating unit 1 has a pressure of 0.1 MPa to 0.7 MPa.

[0075] like Figure 7 As shown, the present invention also proposes a method for thermally activating sulfoaluminate cement concrete, comprising the following steps:

[0076] Step S101: Set the target temperature range.

[0077] Step S103: Open the valve to control the low-pressure atomizing gas generating unit 1 to start and generate low-pressure atomizing gas that is introduced into the low-pressure atomizing gas delivery and uniform distribution unit.

[0078] Step S105: Compare the concrete temperature with the target temperature range in real time. If the concrete temperature reaches the upper limit of the target temperature range, close the valve to stop the delivery of low-pressure atomized gas to the low-pressure atomized gas delivery and uniform distribution unit.

[0079] Step S107: After the low-pressure atomizing gas stops being delivered, the stirring continues for a preset time to homogenize.

[0080] Step S109: Start pumping after homogenization is complete.

[0081] Temperature sensor 3 uses multiple PT100 platinum resistance sensors, which can be installed in the middle area of ​​the mixing tank 2 (average temperature point) or near the discharge port (where a cold material zone is easily formed).

[0082] The programmable logic controller (PLC, integrated in the cab of the concrete pump truck) receives sensor signals and is linked with the relay of the mixing motor and the solenoid valve of the low-pressure atomizing gas pipeline.

[0083] The human-machine interface (HMI, integrated into the cab of the concrete pump truck) includes a touch screen, which is used to set the target temperature, view real-time curves, and alarm information.

[0084] The specific workflow is as follows:

[0085] 1. The operator sets the target temperature (e.g., 26°C) on the HMI.

[0086] 2. Press the "Start" button. The PLC will first check the stirring motor signal. If the stirring does not start, the system will alarm and cannot start heating; this is the first level of safety protection.

[0087] 3. When the concrete mixing system is running, the fixed rod 4 of the rotating rod blade 23 inside the mixing tank 2 remains stationary, and the movable rod 5 of the rotating rod blade 23 drives the rotating rod blade 23 to rotate and mix. Under the premise of mixing operation, the PLC opens the solenoid valve, the low-pressure atomizing gas generating unit 1 inside the concrete pump truck cleaning system starts and generates low-pressure atomizing gas that enters the annular conveying pipeline 21 and is then sprayed out from the low-pressure atomizing gas nozzle 22.

[0088] 4. The PLC compares the reading of temperature sensor 3 with the target value in real time. When the reading of either sensor reaches the upper limit of the target temperature, the PLC immediately closes the solenoid valve.

[0089] 5. After the low-pressure atomizing gas stops, continue stirring for 1-2 minutes to homogenize.

[0090] 6. Once homogenization is complete, the system will display "Ready," and the operator can immediately begin pumping.

[0091] like Figure 6 As shown, the present invention also proposes a construction system, including an on-site thermally activated concrete pump truck, wherein the on-site thermally activated concrete pump truck integrates any of the above-mentioned sulfoaluminate cement concrete thermal activation devices.

[0092] The beneficial effects of this invention are as follows:

[0093] (1) Homogenization and standardization of the activation process: The embedded uniform distribution system in the tank fundamentally avoids local overheating and ensures the consistency of concrete performance.

[0094] (2) Precise control of activation temperature: Through real-time temperature feedback and closed-loop control, the overall temperature of concrete is strictly controlled within the optimal activation window, which not only ensures the activation effect but also eliminates the risk of flash setting.

[0095] (3) High degree of automation guarantee for construction safety: Through the hardware interlock of "stirring-low pressure atomized gas", the catastrophic consequences that may be caused by human error are fundamentally prevented.

[0096] (4) Perfect integration with existing equipment: This device can be installed as a standard module on existing pump trucks, which greatly promotes the popularization of advanced construction methods in engineering applications.

[0097] The present invention also proposes a medium storing a computer program, which, when executed by a processor, enables a thermal activation device for sulfoaluminate cement concrete.

[0098] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A thermal activation device for sulfoaluminate cement concrete, characterized in that, include: A low-pressure atomizing gas generating unit is located outside the mixing tank. The low-pressure atomizing gas generating unit is equipped with a valve, which has a low-pressure atomizing gas outlet and a low-pressure atomizing gas inlet. A low-pressure atomizing gas delivery and uniform distribution unit is located inside the mixing tank to uniformly spray low-pressure atomizing gas into the mixing tank, and the low-pressure atomizing gas delivery and uniform distribution unit is connected to the low-pressure atomizing gas inlet. A temperature detection unit is located inside the mixing tank, and the temperature detection unit is suitable for collecting the temperature of the concrete. The intelligent control unit is communicatively connected to the temperature detection unit and the valve. The intelligent control unit controls the valve to open or close according to the temperature detected by the temperature detection unit, so as to maintain the concrete temperature within the preset activation temperature range.

2. The thermal activation device for sulfoaluminate cement concrete according to claim 1, characterized in that, It also includes a stirring controller, which is adapted to control the start or stop of the stirring action of the stirring tank. The stirring controller is communicatively connected to the intelligent control unit. The stirring controller is configured to control the valve to open to deliver low-pressure atomized gas when the stirring action in the stirring tank is started by the stirring controller.

3. The thermal activation device for sulfoaluminate cement concrete according to claim 1, characterized in that, The low-pressure atomizing gas delivery and uniform distribution unit includes: A ring-shaped conveying pipeline is provided on the inner wall of the stirring tube; Low-pressure atomizing gas nozzles are evenly distributed on the annular delivery pipeline.

4. The thermal activation device for sulfoaluminate cement concrete according to claim 3, characterized in that, The orientation of the low-pressure atomizing gas nozzle was optimized through computational fluid dynamics simulation.

5. The thermal activation device for sulfoaluminate cement concrete according to any one of claims 1 to 4, characterized in that, The temperature detection unit includes multiple temperature sensors, which are located inside the wall of the mixing tank.

6. The thermal activation device for sulfoaluminate cement concrete according to claim 5, characterized in that, The mixing tank is equipped with a stirring device, which includes a stirring rod and stirring blades, and the temperature sensor is also installed inside the stirring rod.

7. The thermal activation device for sulfoaluminate cement concrete according to any one of claims 1 to 4, characterized in that, The intelligent control unit includes a human-machine interface for setting the target temperature, viewing real-time curves, and alarm information.

8. The thermal activation device for sulfoaluminate cement concrete according to any one of claims 1 to 4, characterized in that the target activation temperature range for sulfoaluminate cement concrete is 24°C to 26°C; the temperature range for the low-pressure atomizing gas is 25°C to 30°C; and the gauge pressure range for the low-pressure atomizing gas is 0.1 MPa to 0.7 MPa.

9. A construction system, characterized in that, The invention includes a field-heated concrete pump truck, which integrates a sulfoaluminate cement concrete heat-heating device as described in any one of claims 1 to 8.

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