Electric heating and insulation system for transporting concrete in frigid environments and its construction method

Abstract

This invention provides a concrete transport system with electric heating and insulation for use in extremely cold environments, and its construction method. The system includes multiple detachable arc-shaped heating and insulation modules arranged axially and circumferentially along a rotating mixing drum. The modules are clamped by circumferential clamping rails, axially limited, and double-layered to prevent detachment. A fixed-side power supply and control circuit supply power to the rotating side via coaxial multi-channel conductive slip rings and transmits temperature measurement signals back. The module grounding shield, protective shell, and mixing drum are connected to the fixed-side protective grounding terminal via independent protective grounding channels. The controller adjusts the heating power according to the module temperature, ambient temperature, and mixing drum rotation speed, and includes thermal fuse, residual current, grounding continuity, alarm, and emergency stop protection. The construction process includes installation, calibration, static power-on, low-speed rotation verification, material loading to compensate for heat loss, on-site temperature measurement, and power-off re-inspection.

Description

Technical Field

[0001] This invention relates to the field of low-temperature concrete transportation, and in particular to a concrete transportation system with electrically heated and insulated tanks for use in extremely cold environments, and its construction method. Background Technology

[0002] During winter or in cold regions, ready-mixed concrete needs to be transported over a certain distance and time after being loaded from the batching plant to reach the pouring site. The rotary mixing drum has a large outer surface area and is continuously exposed to low-temperature air, oncoming airflow, and vehicle vibration during transportation. The heat of the concrete can be continuously lost through the drum wall, drum opening, and feeding and discharging mechanisms, resulting in a decrease in the temperature upon arrival at the site, local freezing, reduced workability, or fluctuations in construction performance.

[0003] Existing insulation methods mostly involve covering with insulation cotton, insulation sleeves, or locally arranging electric heating tapes within the cylinder. Due to differences in the curvature of the mixing drum, the shape of the conical section, the position of the raceway, the position of the support rollers, the structure of the drive end, and the arrangement of the rear feeding and discharging mechanisms of different transport vehicles, it is difficult for integral insulation sleeves to simultaneously achieve fit, versatility, and ease of maintenance; localized electric heating tapes are also prone to creating axial or circumferential temperature differences, resulting in significant thermal bridges between the heated and unheated areas.

[0004] The mixing drum needs to rotate continuously or intermittently during transportation and mixing. If the fixed-side cable is directly connected to the heating element that rotates with the drum, it is prone to entanglement, wear, and pull-out; if power is only supplied when the drum is stopped, it is difficult to compensate for the dynamic heat loss during transportation. How to unify the power supply, temperature measurement signal transmission, and protective grounding between the fixed and rotating sides is a key issue that needs to be addressed in the electric heating system of the rotating tank.

[0005] Furthermore, directly welding mounting bases onto thin-walled mixing drums may affect the original drum structure and subsequent maintenance; large-volume integrated heating covers may also cause mechanical interference with raceways, support rollers, reducers, or feeding / discharging mechanisms. Problems such as module detachment, rotational imbalance, water ingress into joints, decreased insulation, localized overheating, and discontinuous protective grounding can also increase the safety risks of vehicle operation and construction.

[0006] Existing control methods typically employ single-point temperature measurement or overall on / off control, making it difficult to independently compensate for heat loss based on temperature differences in different axial and circumferential regions. When sensors fail, slip rings malfunction, or controllers fail, the lack of independent hardware thermal protection and a mains power cut-off path can lead to localized overheating.

[0007] Therefore, there is a need for a method for heating and insulating concrete during transportation in extremely cold environments that can be adapted to different mixing drum shapes, can be detachably installed on existing vehicles, can stably transmit power and wired temperature measurement signals during drum rotation, can implement zoned closed-loop temperature control, and has multi-level mechanical and electrical protection. Summary of the Invention

[0008] The purpose of this invention is to provide a system for transporting concrete in extremely cold environments with electric heating and insulation, and its construction method, which solves the above-mentioned technical problems.

[0009] To solve the above-mentioned technical problems, the present invention provides a construction method for a concrete transportation system with electric heating and insulation in tanks for use in extremely cold environments, comprising the following steps: Step 1: Before loading concrete, inspect the rotary mixing drum and the rear feeding and discharging mechanism; Step 2: Set circumferential clamping rails at intervals along the axial direction of the rotating mixing drum, and detachably install multiple drum body arc-shaped heating and insulation modules in pairs and symmetrically along the circumference of the rotating mixing drum at the circumferential clamping rails, so that the inner side of the drum body arc-shaped heating and insulation modules is thermally bonded to the drum wall of the rotating mixing drum. Step 3: Connect each cylinder arc-shaped heating and insulation module and the corresponding module temperature sensor to the rotating power and signal bus that rotates with the rotating stirring cylinder, connect the rotating power and signal bus to the slip ring rotor of the multi-channel conductive slip ring, and connect the slip ring stator of the multi-channel conductive slip ring to the partition power drive unit and temperature acquisition unit on the fixed side. Step 4: Perform each verification in sequence. After the verification is passed, set the target temperature range and safety protection parameters. Step 5: Load concrete and rotate the rotary mixing drum. The controller obtains the module temperature, ambient temperature, and rotation speed of the rotary mixing drum for each heating zone. Based on the temperature difference of each heating zone and the ambient temperature, it controls the output of the zone power drive unit to transfer heat to the concrete through the arc-shaped heating and insulation module of the drum body and the drum wall of the rotary mixing drum. When any heating zone reaches the preset over-temperature condition or an abnormality occurs, the power supply to the corresponding heating zone is limited or cut off, and the alarm and emergency stop unit executes the alarm or cuts off the main power supply. Step 6: After the concrete arrives at the construction site, test and record the discharge temperature. After unloading, cut off the heating power supply and clean and re-inspect the arc-shaped heating and insulation module, circumferential clamping track, and multi-channel conductive slip ring.

[0010] Furthermore, in step three, the grounding shielding layer, protective shell, and rotating stirring drum of each cylinder arc heating and insulation module are connected at the same potential through a protective grounding conductor, and connected to the fixed side protective grounding terminal through a protective grounding channel independent of the power channel and signal channel within a multi-channel conductive slip ring.

[0011] Furthermore, in step two, the body of the rotating stirring drum is divided into multiple heating zones along the axial direction, and each heating zone is divided into at least two heating partitions along the circumferential direction; the arc-shaped heating and heat preservation modules of the drum body at the same axial position are symmetrically installed with respect to the rotation axis of the rotating stirring drum, and the mechanical interference and rotational balance of each heating partition are checked by low-speed rotation after installation.

[0012] Furthermore, the arc-shaped heating and insulation module of the cylinder body includes, in sequence from the direction facing the cylinder wall of the rotating stirring cylinder to the direction away from the cylinder wall, a flexible heat-conducting pad, a heat-spreading plate, a flexible electric heating layer, an electric insulation layer, an insulation layer, a grounding shielding layer, and a protective shell; the module temperature sensor is set in the adjacent area of ​​the heat-spreading plate and / or the flexible electric heating layer.

[0013] Furthermore, in step two, the track sliding seat is first installed into the circumferential clamping track, and then the cylinder arc heating and insulation module is locked to the track sliding seat by quick-locking buckles. Anti-detachment safety pins and axial stop components are set respectively. An adjustable elastic tensioning component is connected between two adjacent circumferential clamping tracks to apply a pre-tightening force toward the cylinder wall to the cylinder arc heating and insulation module.

[0014] Furthermore, the multi-channel conductive slip ring is coaxially arranged with the rotation axis of the rotating stirring drum. The multi-channel conductive slip ring includes a slip ring stator and a slip ring rotor that rotate relative to each other, as well as an electrically isolated power channel, signal channel, and protective grounding channel. The power channel supplies power to each heating zone, and the signal channel transmits the temperature measurement signal from the module temperature sensor to the fixed side.

[0015] Furthermore, in step five, the controller acquires the temperature measurement signal from the module temperature sensor through the temperature acquisition unit, and also acquires the detection signals from the ambient temperature sensor and the stirring drum speed sensor; when the temperature of the heating zone is lower than the lower limit of the target temperature range, the heating power of the heating zone is increased; when the temperature of the heating zone enters the target temperature range, the heating power is reduced or intermittently output; when the temperature of the heating zone reaches the upper limit of the target temperature range, the heating of the heating zone is stopped; and the discharge temperature is detected by the discharge temperature sensor during discharge.

[0016] Furthermore, in step two, multiple front cone petal-shaped heating and insulation modules are installed in the front cone area of ​​the rotating mixing drum. The multiple front cone petal-shaped heating and insulation modules are symmetrically arranged around the front cone annular base. They are connected to the front cone annular base through petal module hinges and the sides of the front cone petal-shaped heating and insulation modules are tightened to the edge of the front cone annular base through petal module elastic tensioning components. Adjacent front cone petal-shaped heating and insulation modules are overlapped by petal module overlapping skirts and are wrapped around the outer periphery of the multiple front cone petal-shaped heating and insulation modules by front cone annular safety cables.

[0017] Furthermore, a fixed tank opening insulation cover is installed on the outside of the rear feeding and discharging mechanism. The fixed tank opening insulation cover is installed on the rear fixed frame through an obstacle-release hinge, and in the closed position, it forms a safe gap with the opening of the rotating mixing drum through a non-contact labyrinth seal. The heating layer of the insulation cover inside the fixed tank opening insulation cover is allowed to be energized only after the fixed tank opening insulation cover is in the preset closed position and the position detection and safety lock confirm the closing signal.

[0018] This invention also discloses a tank electric heating and insulation concrete transportation system for extremely cold environments, which is constructed according to the construction method of the tank electric heating and insulation concrete transportation system for extremely cold environments.

[0019] The beneficial effects of this invention are as follows: 1. The arc-shaped heating and insulation module of the cylinder body, the front conical petal-shaped heating and insulation module, and the circumferential clamping rail form a detachable modular structure, which can be combined according to the curvature, axial length and obstacle position of different cylinders, reducing permanent modifications to the original cylinder. 2. The arc-shaped heating and insulation modules of the cylinder body are divided into sections along the axial and circumferential directions and installed in pairs symmetrically, which can compensate for the heat loss in different areas and help maintain rotational balance; the flexible heat-conducting pad and heat dissipation plate improve the fit of the cylinder wall and heat diffusion, and the insulation layer reduces heat loss to the outside. 3. The power, wired temperature measurement signal and protective grounding between the fixed side and the rotating side cross the rotation boundary through the corresponding channels in the coaxial multi-channel conductive slip ring, so as to avoid the fixed cable from getting tangled in the rotating cylinder and to avoid replacing the protective grounding conductor with the mechanical contact path of the bearing, roller or cylinder. 4. Quick-locking mechanism, anti-loosening safety pin, axial stop, elastic tensioner and safety cable form a multi-level mechanical restraint; hardware thermal fuse, residual current protection, protective grounding continuity monitoring, zone control and alarm emergency stop constitute multi-layer electrical and thermal safety protection. 5. The controller integrates module temperature, ambient temperature and mixing drum speed for zoned control, and records concrete temperature at discharge, forming a closed loop for installation verification, transportation heating, abnormal handling, on-site temperature measurement and post-unloading re-inspection; 6. The optional fixed tank opening insulation cover reduces cold air exchange at the opening through a non-contact labyrinth structure, while avoiding direct contact between the fixed cover and the rotating opening; the obstruction release, drainage and position interlocking structure improves the safety and cleanability of subsequent operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the modular electric heating and insulation system of the present invention installed on a concrete transport vehicle.

[0021] Figure 2 This is a schematic diagram of the axial partitioning and circumferential symmetrical arrangement of the cylindrical module of the present invention.

[0022] Figure 3 This is an exploded view of the single cylindrical arc-shaped heating and insulation module of the present invention.

[0023] Figure 4 This is a cross-sectional schematic diagram of the radial interlayer structure and heat flow path of the module of the present invention.

[0024] Figure 5This is a schematic diagram of the installation, anti-loosening, and anti-detachment structure of the module and the circumferential clamping track of the present invention.

[0025] Figure 6 This is a schematic diagram of the staggered overlap, sealing, and power supply connection structure of adjacent modules of the present invention.

[0026] Figure 7 This is a schematic diagram of the fixed side and rotating side interfaces of the coaxial multi-channel conductive slip ring of the present invention.

[0027] Figure 8 This is a schematic diagram of the axial and circumferential zone heating and zone temperature measurement arrangement of the present invention.

[0028] Figure 9 This is a schematic diagram showing the installation and disassembly of the front conical petal-shaped heating and insulation module of the present invention.

[0029] Figure 10 This is a schematic diagram of the fixed tank opening insulation cover in the open state, closed state, and non-contact sealing cross-section as a subordinate embodiment of the present invention.

[0030] Figure 11 This is a block diagram of the power supply, slip ring, zoned heating, temperature acquisition, and safety control of the present invention.

[0031] Figure 12 This is a flowchart of the installation, calibration, transportation heating and re-inspection process of the system of the present invention.

[0032] Explanation of reference numerals in the attached diagram: 1. Vehicle chassis; 2. Rotary mixing drum; 3. Arc-shaped heating and insulation module for the drum body; 4. Front conical petal-shaped heating and insulation module; 5. Circumferential clamping track; 6. Multi-channel conductive slip ring; 7. Rotary power and signal bus; 8. Control cabinet; 9. Auxiliary power supply unit; 10. Rear feeding and discharging mechanism; 11. Flexible heat-conducting pad; 12. Heat-spreading plate; 13. Flexible electric heating layer; 14. Electrical insulation layer; 15. Insulation layer; 16. Grounding shielding layer; 17. Protective shell; 18. Module temperature sensor; 19. Hardware thermal fuse; 20. Waterproof electrical connector; 21. Track sliding seat; 22. Quick lock; 23. Anti-detachment safety pin; 24. Axial stop; 25. Overlapping pressing edge; 26. Elastic sealing strip; 27. Power input connector; 28. Power output connector; 29. ​​Adjustable elastic tensioning element; 30. Protective grounding conductor; 31. Slip ring stator; 32 33. Slip ring rotor; 34. Power channel; 35. Signal channel; 36. Hollow shaft and support; 37. External power interface; 38. Power selection and main protection unit; 39. Zoned power drive unit; 40. Temperature acquisition unit; 41. Controller; 42. Ambient temperature sensor; 43. Discharge temperature sensor; 44. Mixing drum speed sensor; 45. Alarm and emergency stop unit; 46. Front cone annular base; 47. Petal module hinge; 48. Petal module elastic tensioning component; 49. Petal module overlapping skirt; 50. Petal module connector; 51. Front cone annular safety cable; 52. Fixed tank opening insulation cover; 53. Rear fixing frame; 54. Obstruction detection release hinge; 55. Insulation cover heating layer; 56. Insulation cover insulation layer; 57. Washable lining; 58. Non-contact labyrinth seal; 59. Drain outlet; 60. Position detection and safety lock; 71. Tank opening safety clearance. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0034] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, the above terms should not be construed as limiting this invention.

[0035] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0036] like Figures 1-12 The present invention provides a construction method for a concrete transport system with electric heating and insulation in tanks for use in extremely cold environments, comprising the following steps: Step 1, Installation Preparation: Before loading concrete, inspect the drum wall, support parts, drive parts and rear feeding and discharging mechanism 10 of the rotary mixing drum 2 to determine the module installation area of ​​the clearance roller, support roller, drive end and rear feeding and discharging mechanism 10. Step 2, Module Installation: Circumferential clamping rails 5 are set at intervals along the axial direction of the rotating mixing drum 2 in the module installation area. Multiple cylindrical arc-shaped heating and insulation modules 3 are detachably installed in pairs and symmetrically along the circumference of the rotating mixing drum 2 at the circumferential clamping rails 5, so that the inner side of the cylindrical arc-shaped heating and insulation module 3 is thermally bonded to the drum wall of the rotating mixing drum 2, and the cylindrical arc-shaped heating and insulation module 3 is circumferentially clamped, axially limited, and mechanically prevented from falling off. Step 3: Rotation Power Supply, Temperature Measurement, and Grounding Connection: Connect each arc-shaped heating and insulation module 3 and its corresponding module temperature sensor 18 to the rotating power and signal bus 7 that rotates with the rotating stirring drum 2. Connect the rotating power and signal bus 7 to the slip ring rotor 32 of the multi-channel conductive slip ring 6, and connect the slip ring stator 31 of the multi-channel conductive slip ring 6 to the partition power drive unit 38 and temperature acquisition unit 39 on the fixed side. Connect the grounding shield layer 16, protective shell 17, and rotating stirring drum 2 of each arc-shaped heating and insulation module 3 to the grounding shield layer 16, the protective shell 17, and the rotating stirring drum 2 to the grounding shield layer 30. Connect the grounding shield layer 16 to the grounding shield layer 30 of each arc-shaped heating and insulation module 3 to the grounding shield layer 34 on the fixed side through the grounding shield layer 34 of the multi-channel conductive slip ring 6, which is independent of the power channel 33 and the signal channel 34. This will allow the power supply, wired temperature measurement signal, and grounding shield to cross the rotation boundary between the fixed side and the rotating side. Step 4, Pre-operation verification: Perform insulation and protective grounding checks, mechanical locking and anti-loosening checks, module temperature sensor 18 calibration, static zone power-on test and low-speed rotation verification in sequence. After the verification is qualified, set the target temperature range and safety protection parameters. Step 5, Heating and Insulation During Transportation: Load concrete and rotate the rotary mixing drum 2. The controller 40 acquires the module temperature, ambient temperature, and rotation speed of the rotary mixing drum 2 for each heating zone. Based on the temperature differences of each heating zone and the ambient temperature, it controls the output of the zone power drive unit 38 to transfer heat to the concrete through the arc-shaped heating and insulation module 3 and the drum wall of the rotary mixing drum 2. When any heating zone reaches the preset over-temperature condition or an electrical, sensor, or rotary connection abnormality occurs, the power supply to the corresponding heating zone is limited or cut off, and the alarm and emergency stop unit 44 executes an alarm or cuts off the main power supply. Step Six: On-site Re-inspection: After the concrete arrives at the construction site, the discharge temperature is tested and recorded. After unloading is completed, the heating power is cut off. The arc-shaped heating and insulation module 3, the circumferential clamping track 5, the multi-channel conductive slip ring 6, and the electrical connection parts are cleaned and re-inspected.

[0037] In step two, the body of the rotating stirring drum 2 is divided into multiple heating zones along the axial direction, and each heating zone is divided into at least two heating partitions along the circumferential direction; the arc-shaped heating and heat preservation modules 3 of the body at the same axial position are symmetrically installed about the rotation axis of the rotating stirring drum 2, and after installation, the mechanical interference and rotational balance of each heating partition are checked by low-speed rotation.

[0038] The cylindrical arc-shaped heating and insulation module 3 includes, in sequence from the direction facing the cylinder wall of the rotating stirring cylinder 2 to the direction away from the cylinder wall, a flexible heat-conducting pad 11, a heat-spreading plate 12, a flexible electric heating layer 13, an electrical insulation layer 14, an insulation layer 15, a grounding shielding layer 16, and a protective shell 17; the module temperature sensor 18 is disposed in the adjacent area of ​​the heat-spreading plate 12 and / or the flexible electric heating layer 13.

[0039] In step two, the track sliding seat 21 is first installed into the circumferential clamping track 5, and then the cylinder arc heating and insulation module 3 is locked to the track sliding seat 21 by the quick lock 22. Anti-detachment safety pins 23 and axial stop members 24 are respectively set. The adjustable elastic tension member 29 is connected between two adjacent circumferential clamping tracks 5, and the threaded top member at the adjustable elastic tension member 29 applies a pre-tightening force toward the cylinder wall to the cylinder arc heating and insulation module 3.

[0040] Adjacent cylindrical arc-shaped heating and insulation modules 3 are joined by overlapping and pressing edges 25 to form staggered joints, with elastic sealing strips 26 installed at the joints; the electric heating circuits of adjacent cylindrical arc-shaped heating and insulation modules 3 are connected by waterproof power input connectors 27 and power output connectors 28, and the grounding shielding layer 16, protective shell 17 and rotating stirring drum 2 are connected at the same potential through a protective grounding conductor 30 independent of the electric heating circuit. The protective grounding conductor is set separately from the heating power supply conductor, thereby reducing the possibility of rain, snow, wash water and road pollutants entering the module joints and electrical connection parts.

[0041] The multi-channel conductive slip ring 6 is coaxially arranged with the rotation axis of the rotating stirring drum 2, including a slip ring stator 31 and a slip ring rotor 32 that rotate relative to each other, and includes an electrically isolated power channel 33, a signal channel 34, a protective grounding channel, a hollow shaft, and a support component; the power channel 33 supplies power to each heating zone, the signal channel 34 transmits the temperature measurement signal of the module temperature sensor 18 to the fixed side, and the protective grounding conductor 30 is connected to the protective grounding terminal of the fixed side through the protective grounding channel, and is not replaced by the neutral conductor of the heating circuit, the signal shielding wire, the bearing or roller contact path of the rotating stirring drum 2.

[0042] In step five, the controller 40 acquires the temperature measurement signal from the module temperature sensor 18 through the temperature acquisition unit 39, and acquires the detection signals from the ambient temperature sensor 41 and the stirring drum speed sensor 43; when the temperature of the heating zone is lower than the lower limit of the target temperature range, the heating power of the heating zone is increased; when the temperature of the heating zone enters the target temperature range, the heating power is reduced or intermittently output; when the temperature of the heating zone reaches the upper limit of the target temperature range, the heating of the heating zone is stopped; and the discharge temperature is detected by the discharge temperature sensor 42 during discharge.

[0043] Each cylindrical arc-shaped heating and insulation module 3 has a heating circuit equipped with a hardware thermal fuse 19 connected in series; the external power interface 36 on the fixed side is connected in a TN-S wiring manner, and the external power interface 36 and the auxiliary power supply unit 9 are connected to the partition power drive unit 38 through the power selection and main protection unit 37. The power selection and main protection unit 37 is equipped with residual current protection and protective grounding continuity monitoring functions; the alarm and emergency stop unit 44 limits or cuts off the heating power supply when over-temperature, insulation abnormality, residual current abnormality, protective grounding continuity abnormality, slip ring abnormality or sensor abnormality occurs.

[0044] Multiple front cone petal-shaped heating and insulation modules 4 are further installed in the front cone area of ​​the rotating mixing drum 2. The multiple front cone petal-shaped heating and insulation modules 4 are symmetrically arranged around the front cone annular base 45. They are connected to the front cone annular base 45 through petal module hinges 46, and the sides of the front cone petal-shaped heating and insulation modules 4 are tightened to the edges of the front cone annular base 45 through petal module elastic tensioners 47 to ensure that they fit the front cone surface. Adjacent front cone petal-shaped heating and insulation modules 4 are overlapped by petal module overlapping skirts 48, and a front cone annular safety cable 50 is wrapped around the outer periphery of the multiple front cone petal-shaped heating and insulation modules 4 to form a secondary anti-detachment constraint.

[0045] The front cone annular base 45 can be fixedly connected to the front cone area of ​​the rotating mixing drum 2 to provide an installation platform for the front cone petal-shaped heating and insulation module 4.

[0046] A fixed tank opening insulation cover 51 that does not rotate with the rotating mixing drum 2 is further provided on the outside of the rear feeding and discharging mechanism 10. The fixed tank opening insulation cover 51 is installed on the rear fixing frame 52 through the obstacle release hinge 53, and forms a safe gap 60 between the tank opening and the opening of the rotating mixing drum 2 through the non-contact labyrinth seal 57 when the fixed tank opening insulation cover 51 is in the preset closed position and confirmed by the position detection and safety lock 59. The heating layer 54 of the insulation cover is allowed to be energized only after the fixed tank opening insulation cover 51 is in the preset closed position and confirmed by the position detection and safety lock 59.

[0047] In step four, the module temperature sensor 18 is calibrated before the static partition power-on test, and the static partition power-on test is performed before the low-speed rotation verification. If an abnormality is detected during the static partition power-on test, low-speed rotation verification, or transportation heating and insulation process, the heating power supply is cut off and an alarm is triggered. After the abnormality is eliminated, the corresponding verification steps are re-executed.

[0048] This solution also discloses a concrete transport system with electric heating and insulation for use in extremely cold environments. The system is installed on a concrete transport vehicle with a rotating mixing drum 2, and includes: multiple arc-shaped heating and insulation modules 3 arranged axially and circumferentially along the rotating mixing drum 2, and thermally bonded to the drum wall; a circumferential clamping track 5, detachably mounted on the outside of the rotating mixing drum 2, used for circumferential clamping and axial limiting of the arc-shaped heating and insulation modules 3; a rotating power and signal bus 7 and a multi-channel conductive slip ring 6, wherein the rotating power and signal bus 7 is connected to the arc-shaped heating and insulation modules 3, the module temperature sensor 18, and the slip ring rotor 32 of the multi-channel conductive slip ring 6, and the slip ring stator 31 of the multi-channel conductive slip ring 6 is connected to the power supply and control circuit on the fixed side; and a control cabinet 8, located on the fixed side of the vehicle chassis 1, which includes a power selection and control circuit. The system includes a main protection unit 37, a zone power drive unit 38, a temperature acquisition unit 39, and a controller 40. The controller 40 is configured to adjust the output of the zone power drive unit 38 according to the module temperature of each heating zone. The protective grounding system includes a fixed-side protective grounding terminal, an independent protective grounding channel set in the multi-channel conductive slip ring 6, and a rotating-side equipotential bonding point. The rotating-side equipotential bonding point is connected to the grounding shielding layer 16, the protective shell 17, and the rotating stirring drum 2 through the protective grounding conductor 30. The system also includes an alarm and emergency stop unit 44, which is connected to the power selection and main protection unit 37 and is used to limit or cut off the heating power supply when there is overheating or abnormal operation. The power, wired temperature measurement signal, and protective grounding between the fixed side and the rotating side that rotates with the rotating stirring drum 2 are transmitted or connected through corresponding channels that are isolated from each other in the same multi-channel conductive slip ring 6.

[0049] The cylindrical arc-shaped heating and insulation module 3 includes, from the inside out, a flexible heat-conducting pad 11, a heat-spreading plate 12, a flexible electric heating layer 13, an electrical insulation layer 14, an insulation layer 15, a grounding shielding layer 16, and a protective shell 17. The module temperature sensor 18 is located in the adjacent area of ​​the heat-spreading plate 12 and / or the flexible electric heating layer 13. The hardware thermal fuse 19 is connected in series in the power supply circuit of the flexible electric heating layer 13.

[0050] The circumferential clamping track 5 is equipped with a track sliding seat 21, a quick lock 22, an anti-detachment safety pin 23, and an axial stop 24. The cylindrical arc-shaped heating and heat preservation module 3 is connected to the track sliding seat 21 through the quick lock 22 to form a first mechanical constraint, and the anti-detachment safety pin 23 forms a second mechanical anti-detachment path independent of the quick lock 22. The axial stop 24 restricts the track sliding seat 21 from detaching along the circumferential clamping track 5.

[0051] Adjacent cylindrical arc-shaped heating and insulation modules 3 are provided with mutually cooperating overlapping pressure edges 25 and elastic sealing strips 26, and are provided with waterproof power input connectors 27 and power output connectors 28; the grounding shielding layer 16, protective shell 17 and rotating stirring drum 2 of each cylindrical arc-shaped heating and insulation module 3 are connected to the rotating side equipotential connection point through the protective grounding conductor 30, and the rotating side equipotential connection point is connected to the fixed side protective grounding terminal through the independent protective grounding channel in the multi-channel conductive slip ring 6.

[0052] It also includes multiple front cone petal-shaped heating and insulation modules 4, which are symmetrically arranged around the front cone annular base 45, and are respectively provided with petal module hinge 46, petal module elastic tensioning 47, petal module overlapping skirt 48 and petal module connector 49; a front cone annular safety rope 50 is provided on the outer side of the multiple front cone petal-shaped heating and insulation modules 4.

[0053] It also includes a fixed can opening insulation cover 51 fixed to the rear fixing frame 52 and not rotating with the rotating stirring drum 2. The fixed can opening insulation cover 51 is connected to the rear fixing frame 52 through an obstacle-detection release hinge 53. One side of the surface of the fixed can opening insulation cover 51 is covered with an insulation cover heating layer 54, an insulation cover insulation layer 55 and a washable inner lining 56. The opening of the fixed can opening insulation cover 51 is provided with a non-contact labyrinth seal 57, a drain outlet 58 and a position detection and safety lock 59. A safety gap 60 is maintained between the non-contact labyrinth seal 57 and the opening of the rotating stirring drum 2. The non-contact labyrinth seal 57 has a relief groove at the corresponding position of the drain outlet 58 to ensure stable drainage of the drain outlet 58.

[0054] To further describe the specific implementation of this solution in detail, the following description is provided in conjunction with the accompanying drawings: Figure 1As shown, a rotary mixing drum 2, a control cabinet 8, an auxiliary power supply unit 9, and a rear feeding / discharging mechanism 10 are mounted on the vehicle chassis 1. An arc-shaped heating and insulation module 3 and a front conical petal-shaped heating and insulation module 4 are installed on the outside of the rotary mixing drum 2. A rotary power and signal bus 7 is arranged along the drum body and rotates with it. The control cabinet 8 and the auxiliary power supply unit 9 are located on the fixed side. A multi-channel conductive slip ring 6 is located near the drive end and is coaxial with the drum's rotation axis.

[0055] like Figure 2 and Figure 8 As shown, the cylinder body is divided into multiple axial regions, avoiding the raceway, support rollers, drive flange, and rear feeding / discharging mechanism 10. Multiple arc-shaped heating and insulation modules 3 are arranged circumferentially in each axial region. The modules are preferably installed in pairs symmetrically about the axis of rotation; the number of modules, circumferential angle, and axial length are determined based on the target vehicle's cylinder scanning dimensions, allowable installation space, and heating power requirements. Spacing is maintained between adjacent axial regions for tracks, cables, maintenance, and cylinder structural deformation.

[0056] The circumferential clamping track 5 preferably adopts a segmented, weld-free clamping structure. Each segment of the track forms a closed loop through detachable connectors (bolts, etc.), and a heat-resistant, insulating, elastic gasket can be installed between the track and the cylinder. For newly manufactured cylinders, the track can also be connected to the original factory-reinforced structure or a special mounting base, but the track position must still avoid the original support and drive components.

[0057] like Figure 3 and Figure 4 As shown, the cylindrical arc-shaped heating and insulation module 3 is arranged sequentially from the inside out as follows: a flexible heat-conducting pad 11, a heat-spreading plate 12, a flexible electric heating layer 13, an electrical insulation layer 14, an insulation layer 15, a grounding shielding layer 16, and a protective shell 17. The flexible heat-conducting pad 11 is used to compensate for the curvature error of the cylinder wall and minor surface unevenness; the heat-spreading plate 12 diffuses heat along the in-plane of the module; the flexible electric heating layer 13 generates heat; the electrical insulation layer 14 isolates the charged heating components from the external structure; the insulation layer 15 inhibits outward heat dissipation; and the grounding shielding layer 16 and the protective shell 17 provide electrical shielding, mechanical protection, and equipotential bonding conditions.

[0058] The flexible heating layer 13 can be made of a bend-resistant resistance heating element, a flexible heating film, or other heating elements that can fit into the curved surface; the heat spreader 12 can be made of a heat-conducting metal plate or a heat-conducting composite plate; the insulation layer 15 is made of a heat-conducting material that is stable in performance under set operating temperature, vehicle vibration, and rain and snow conditions; the protective shell 17 is made of a weather-resistant, waterproof material with sufficient impact resistance; the temperature resistance of each layer of material is higher than the normal control limit and a safety margin is provided.

[0059] A module temperature sensor 18 is located in the vicinity of the heat spreader 12 and / or the flexible heating layer 13 to reflect the temperature of the heating area; a hardware thermal fuse 19 is connected in series in the power supply circuit of the flexible heating layer 13, and its operating temperature is higher than the normal control upper limit and lower than the allowable temperature of the material with the lowest temperature resistance in the module; a waterproof electrical connector 20 is used for detachable connection between the internal components of the module and the external wiring harness; and a protective grounding conductor 30 connects the grounding shield 16, the protective shell 17 and the rotating stirring drum 2 to the equipotential bonding point on the rotating side.

[0060] like Figure 5 As shown, the track sliding seat 21 is installed on the circumferential clamping track 5 and its position can be adjusted along the track. The cylindrical arc-shaped heating and heat preservation module 3 is locked to the track sliding seat 21 by the quick lock 22. The anti-detachment safety pin 23 passes through the corresponding locking hole to form a second anti-detachment path independent of the quick lock 22. The axial stop 24 restricts the sliding seat 21 from detaching from the end of the track or the opening. The adjustable elastic tensioning member 29 connects the adjacent track or the corresponding mounting point and applies a pre-tightening force toward the cylinder wall to the module.

[0061] During installation, first position the module with a small preload and check the contact between the inner side of the module and the cylinder wall. Then, adjust the adjustable elastic tensioning element 29 sequentially and symmetrically. The preload should be such that the module does not slip relative to the cylinder wall under low-speed rotation and vehicle vibration conditions, and does not cause unacceptable deformation of the cylinder wall. After the quick lock 22 is closed, install the anti-loosening safety pin 23 and check that the axial stop 24 is in the effective limit position.

[0062] like Figure 6 As shown, the edges of adjacent cylindrical arc-shaped heating and insulation modules 3 are joined by overlapping and pressing edges 25 to form staggered joints, and the elastic sealing strip 26 is located in the overlapping channel; the overlapping direction is preferably such that rain, snow and washing water pass over the joint along the outer surface without directly entering the module interior; the power input connector 27 is connected to the power output connector 28 of the adjacent module; the protective grounding conductor 30 adopts an independent connection path and is not replaced by the neutral conductor of the heating circuit, signal shielding wire, bearing or roller contact path.

[0063] like Figure 7 As shown, the multi-channel conductive slip ring 6 includes a fixed slip ring stator 31, a slip ring rotor 32 that rotates with the cylinder, a power channel 33, a signal channel 34, an independent protective grounding channel, and a hollow shaft and support 35. The fixed-side wiring harness of the slip ring stator 31 connects to the control cabinet 8 and the fixed-side protective grounding terminal, while the rotating-side wiring harness of the slip ring rotor 32 connects to the rotating power and signal bus 7 and the rotating-side equipotential bonding point. The hollow shaft and support 35 maintain the coaxial relationship between the stator and rotor and provide space for wiring harnesses or mechanical connections.

[0064] The number and rated current carrying capacity of power channels 33 are determined based on the number of heating zones, power supply method, and total power; the number of signal channels 34 are determined based on the number and signal type of module temperature sensors 18; the current carrying capacity, contact reliability, and conductor cross-section of the protective grounding channel are determined according to the fault current and the operating conditions of the protection device, and two parallel sliding contacts can be used to form redundant contact; the power channels 33, signal channels 34, and protective grounding channels are arranged according to the insulation and electromagnetic compatibility requirements of each other, the fixed side cable must not cross the slip ring and directly connect to the rotating side module, and the rotating side harness should be fixed on the cylinder or track and retain the length required to meet the thermal expansion and contraction and maintenance disassembly and assembly.

[0065] like Figure 8 and Figure 11 As shown, the external power interface 36 and the auxiliary power supply unit 9 are respectively connected to the power selection and main protection unit 37; the power selection and main protection unit 37 selects and interlocks the two power supplies to prevent different power supplies from being connected in parallel, and supplies power to the partition power drive unit 38; the output of the partition power drive unit 38 is connected to the corresponding cylinder arc heating and insulation module 3 via the slip ring stator 31, the multi-channel conductive slip ring 6, the slip ring rotor 32 and the hardware thermal fuse 19 in sequence; the separately set fixed side protective grounding terminal is connected to the rotating side equipotential connection point via the slip ring stator 31, the protective grounding channel in the multi-channel conductive slip ring 6 and the slip ring rotor 32. This grounding path is independent of the above heating power supply path and temperature measurement signal path.

[0066] The signal from the rotating side module temperature sensor 18 passes sequentially through the slip ring rotor 32, the multi-channel conductive slip ring 6, and the slip ring stator 31 into the fixed side temperature acquisition unit 39. The ambient temperature sensor 41, the discharge temperature sensor 42, and the mixing drum speed sensor 43 are installed on the fixed side and connected to the controller 40. The discharge temperature sensor 42 can perform contact or non-contact temperature measurement on the discharged concrete during unloading. During the non-unloading stage, its signal is not used as a substitute value for the internal temperature of the continuous concrete.

[0067] The controller 40 divides the cylinder into multiple independent control zones along the axial and circumferential directions. Let the temperature of the i-th zone be... The lower limit of the target temperature range is The upper limit is :when Below When, increase the output of the corresponding partition; when When entering the target temperature range, reduce power, adjust duty cycle, or use intermittent heating to maintain the temperature; when Reaching or exceeding When the temperature drops, heating in that zone is stopped; the controller 40 can also feedforward compensation or limit the allowable output based on the decrease in ambient temperature, the increase in temperature difference between different zones, or the change in the speed of the stirring drum.

[0068] The design power of the heating system can be determined based on the convection, radiation, and structural thermal bridge losses in each area of ​​the cylinder, the heat that the concrete needs to compensate for, and the additional heat dissipation at the cylinder opening; a relational formula can be used during the design. In the formula, To design heating power, For safety reasons, , and These represent the overall heat transfer coefficient, heat transfer area, and internal / external temperature difference for region i, respectively; n is the number of regions involved in the thermal calculation; and m and These are concrete mass and equivalent specific heat capacity, respectively. The temperature drop that can be compensated during the transportation phase is given by t, where t is the compensation time. The parameters are determined based on the target vehicle model, transportation route, ambient temperature, and concrete temperature control scheme, including thermal losses from the cylinder opening, structural thermal bridges, and other additional heat losses.

[0069] The alarm and emergency stop unit 44 receives abnormal signals from the controller 40 or the independent protection circuit. When the following occurs: module overheating, thermal fuse tripping, insulation abnormality, residual current abnormality, protective grounding continuity abnormality, slip ring temperature rise or contact abnormality, sensor open circuit or short circuit, zone current abnormality, loose rotating harness, or stirring drum speed exceeding the allowable heating range, the corresponding zone is first restricted or disconnected. When the protective grounding is interrupted, the residual current exceeds the set value, the abnormality may affect multiple zones, or reliable positioning is impossible, all heating power is disconnected via power selection and the main protection unit 37. Power cannot be restored until the protective grounding continuity abnormality is resolved.

[0070] like Figure 9 As shown, multiple front cone petal-shaped heating and insulation modules 4 can be set in the front cone region of the rotating stirring drum 2; multiple petal modules 4 are symmetrically arranged around the front cone annular base 45, the petal module hinge 46 allows the module to adjust the angle relative to the base, the petal module elastic tension 47 makes the module fit against the front cone surface, and adjacent modules overlap with the petal module overlapping skirt 48; each petal module is connected to the rotating power and signal bus 7 through the petal module connector 49, and the front cone annular safety cable 50 forms a common secondary constraint around the multiple petal modules.

[0071] The number and sector angle of the front cone petal-shaped heating and insulation modules 4 are determined based on the front cone surface, the central drive flange, bolts, and maintenance space. During installation, it should be ensured that the petal modules, connectors, and safety cables do not obstruct the drive end fasteners and do not interfere with the fixed side components. Each petal module is also installed symmetrically and checked by low-speed rotation.

[0072] like Figure 10As shown, when it is necessary to further reduce heat dissipation at the cylinder opening, a fixed cylinder opening insulation cover 51 can be added to the outside of the rear feeding and discharging mechanism 10. The fixed cylinder opening insulation cover 51 is installed on the rear fixed frame 52 through the obstruction release hinge 53. The rear fixed frame 52 is fixed to the vehicle structure. The fixed cylinder opening insulation cover 51 does not rotate with the rotating mixing cylinder 2. The cover can provide passage for loading, unloading and cleaning in the open position, and cover the main heat dissipation area around the cylinder opening in the closed position.

[0073] The fixed tank opening insulation cover 51 is provided with an insulation cover heating layer 54, an insulation cover insulation layer 55 and a washable liner 56; the washable liner 56 faces the side that may be contaminated by concrete slurry and flushing water, the insulation cover heating layer 54 and the insulation cover insulation layer 55 are located between or in the vicinity of the cover protection structure and the washable liner 56, and a drain outlet 58 is provided at the bottom of the cover to allow flushing water and condensate to be discharged.

[0074] After the fixed tank opening insulation cover 51 is closed, a safe gap 60 is maintained between the non-contact labyrinth seal 57 and the rotating cylinder opening. The labyrinth path reduces direct exchange of cold air without friction with the rotating cylinder opening. The position detection and safety lock 59 is used to confirm the position and locking status of the cover. The heating layer 54 of the insulation cover is only allowed to be energized when the cover is detected to be in the closed position that allows heating. When obstructed by materials, tools or personnel, the obstruction release hinge 53 allows the cover to be released or opened. Figure 10 The structure shown is an optional additional option; without this structure installed, Figure 1 The basic system shown can still implement zoned heating and insulation of the cylinder.

[0075] The following is combined Figure 12 Explanation of the optimal construction method process: S101. Cylinder inspection: Remove loose material, ice, snow, oil stains and sharp protrusions from the outer surface of the rotating mixing drum 2. Inspect the drum wall, raceway, support rollers, drive end and rear feeding / discharging mechanism 10. Record the areas that cannot be covered and determine the position of the circumferential clamping track 5.

[0076] S102. Install clamping rails: Assemble the circumferential clamping rails 5 according to the measured curvature of the cylinder, so that the relative position of each rail to the rotation axis meets the module installation requirements; check the tightness of the rail interfaces and the safe distance between the rails and the rollers, support rollers, fixed platform and wire harness.

[0077] S103. Paired installation modules: First, install a pair of symmetrical modules in the same axial position, and then install the remaining modules in sequence; adjust the track sliding seat 21 and the adjustable elastic tensioning element 29 to make the flexible heat-conducting pad 11 continuously adhere to the cylinder wall, close the quick lock 22 and install the anti-detachment safety pin 23, and finally install the axial stop element 24.

[0078] S104. Install slip ring, bus and ground: Coaxially install the multi-channel conductive slip ring 6 on the drive end, connect the fixed-side power supply and control harness to the slip ring stator 31, and connect the rotating power and signal bus 7 to the slip ring rotor 32; fix the rotating bus along the rotating stirring drum 2 and connect the power connectors and temperature sensors of each module; connect the grounding shield 16, the protective shell 17 and the rotating stirring drum 2 to the rotating side equipotential bonding point, and then connect to the fixed-side protective grounding terminal through the independent protective grounding channel inside the slip ring.

[0079] S105. Insulation and grounding inspection: Under the condition of no power, check the insulation of the heating circuit, the continuity of the protective grounding of each module, the equipotential connection of the grounding shielding layer 16, the protective shell 17 and the rotating stirring drum 2, the continuity of the slip ring protective grounding channel from the fixed side to the rotating side, the insulation between each channel of the slip ring, and the wiring correspondence between the fixed side and the rotating side wiring harness; confirm that the protective grounding does not depend on the bearing, roller or other uncertain mechanical contact path.

[0080] S106. Sensor calibration: Perform zero-point, range, or comparison calibration on module temperature sensor 18, ambient temperature sensor 41, discharge temperature sensor 42, and stirring drum speed sensor 43 to confirm that the channel number of temperature acquisition unit 39 is consistent with the actual heating zone.

[0081] S107. Static Zone Power-On: With the mixing drum stopped and no mechanical personnel touching the heating components, power on each zone briefly to verify the corresponding relationship between zone current, temperature rise direction, sensor response, thermal fuse connection, and controller output; if any abnormality is found, immediately cut off the power and alarm; after troubleshooting, re-perform the insulation grounding check and the corresponding zone test.

[0082] S108. Low-speed rotation verification: Rotate the mixing drum at a verification speed lower than the normal transport mixing speed, and observe whether there is any swaying, loosening, interference or abnormal noise in the module, track, bus, slip ring and front cone module. Also check the continuity of the slip ring signal and the rotation balance. If any abnormality is found, power off and stop the machine, and re-check the mechanical anti-detachment and wiring harness fixation.

[0083] S109. Set control parameters: Based on ambient temperature, concrete outlet temperature, target arrival temperature, estimated transportation time, heat dissipation characteristics of the drum and temperature resistance level of the material, set the target temperature range, power limit for each zone, control hysteresis, sensor fault criteria, mixing drum speed interlock and total power limit; the operating temperature of the hardware thermal fuse is not replaced by software parameters.

[0084] S110, Loading and compensating for heat loss: After loading concrete, the mixing drum is rotated according to transportation requirements. The controller 40 adjusts the heating power according to the temperature of each zone module, the ambient temperature, and the rotation speed. When the ambient temperature decreases or the temperature drops rapidly in the windward area, the allowable output of the corresponding zone is increased. When the zone temperature approaches the upper limit or the drum stops rotating for more than the set time, the power is reduced or the heating of the corresponding zone is stopped.

[0085] S111. On-site temperature measurement record: When the vehicle arrives at the construction site and begins unloading, the discharge temperature sensor 42 is used to detect the discharge temperature and record the transportation time, ambient temperature, temperature of each zone, alarm status and discharge temperature; if the measured temperature does not meet the construction temperature control plan, it shall be handled in accordance with the on-site quality control procedure, and the necessary quality judgment shall not be replaced by continuing to heat.

[0086] S112. Power-off cleaning and re-inspection: After unloading, disconnect the power supply, confirm that the slip ring and module are not energized, and then remove the residue from the outer surface of the module, seams, connectors and optional tank opening insulation cover; check the latches, safety pins, stop parts, tensioning parts, elastic sealing strips, wire harness fixation, slip ring temperature rise marks and protective grounding conductor. Only after confirming that there are no abnormalities can the next transportation cycle be started.

[0087] To further illustrate the implementation process of this solution, the following example is used: In an example of setting parameters for a frigid environment, the design ambient temperature range can be -20℃ to 0℃, and the concrete transportation temperature control target can be 5℃ to 25℃. The specific target arrival temperature and the upper and lower limits of control for each heating zone are determined based on the concrete mix proportion, pouring location, expected transportation time, and approved winter construction temperature control plan. The controller uses module temperature as continuous feedback and discharge temperature as arrival verification data. In actual operation, it records transportation time, ambient temperature, zone temperature, heating status, and discharge temperature to correct the upper limit of zone power and control hysteresis. The above parameters are only used to illustrate the setting method of control parameters and do not constitute engineering test results, nor do they limit the applicable environment or control scope of the present invention.

[0088] This invention can employ different numbers of axial and circumferential partitions; the shape of the cylindrical arc-shaped heating and insulation module 3 can be adjusted according to cylindrical, conical, or transitional sections; the power supply can be selected from external power supply, vehicle-mounted independent power supply, or a combination of both, depending on the vehicle and construction site conditions; the external power supply preferably adopts a TN-S system, with the neutral conductor N and protective conductor PE completely separated; the fixed-side protective grounding terminal is connected to the power supply protective grounding terminal and the vehicle's metal frame; when using a vehicle-mounted independent power supply, the relationship between the power supply neutral point and the protective grounding is determined on the power supply side according to the grounding method of the independent power supply, and the N line and PE line are not repeatedly connected downstream. Regardless of the power supply method used, the wired power, temperature measurement signal, and protective grounding between the fixed side and the rotating side all cross the rotation boundary through the corresponding channels in the multi-channel conductive slip ring 6.

[0089] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A construction method for a concrete transport system with electric heating and insulation in tanks used in frigid environments, characterized in that, Includes the following steps: Step 1: Before loading concrete, inspect the rotary mixing drum (2) and the rear feeding and discharging mechanism (10); Step 2: Set circumferential clamping rails (5) at intervals along the axial direction of the rotating stirring drum (2), and install multiple cylindrical arc heating and heat preservation modules (3) in pairs and symmetrically on the circumferential direction of the rotating stirring drum (2) in the circumferential clamping rails (5), so that the inner side of the cylindrical arc heating and heat preservation module (3) is thermally bonded to the cylinder wall of the rotating stirring drum (2). Step 3: Connect each cylinder arc heating and insulation module (3) and the corresponding module temperature sensor (18) to the rotating power and signal bus (7) that rotates with the rotating stirring cylinder (2), connect the rotating power and signal bus (7) to the slip ring rotor (32) of the multi-channel conductive slip ring (6), and connect the slip ring stator (31) of the multi-channel conductive slip ring (6) to the partition power drive unit (38) and temperature acquisition unit (39) on the fixed side; Step 4: Perform each verification in sequence. After the verification is passed, set the target temperature range and safety protection parameters. Step 5: Load concrete and rotate the rotary mixing drum (2). The controller (40) obtains the module temperature, ambient temperature and rotation speed of the rotary mixing drum (2) of each heating zone. Based on the temperature difference of each heating zone and the ambient temperature, the controller controls the output of the zone power drive unit (38) to transfer heat to the concrete through the arc-shaped heating and insulation module (3) and the wall of the rotary mixing drum (2). When any heating zone reaches the preset over-temperature condition or an abnormality occurs, the power supply to the corresponding heating zone is restricted or cut off, and the alarm and emergency stop unit (44) performs an alarm or cuts off the main power supply. Step 6: After the concrete arrives at the construction site, test and record the discharge temperature. After unloading, cut off the heating power supply and clean and re-inspect the cylinder arc heating and insulation module (3), circumferential clamping track (5), and multi-channel conductive slip ring (6).

2. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: In step three, the grounding shield layer (16), protective shell (17) and rotating stirring drum (2) of each cylinder arc heating and heat preservation module (3) are connected at the same potential through the protective grounding conductor (30), and connected to the fixed side protective grounding terminal through the protective grounding channel in the multi-channel conductive slip ring (6) which is independent of the power channel (33) and signal channel (34).

3. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: In step two, the body of the rotating stirring drum (2) is divided into multiple heating zones along the axial direction, and each heating zone is divided into at least two heating partitions along the circumferential direction; the arc-shaped heating and heat preservation module (3) of the body at the same axial position is symmetrically installed relative to the rotation axis of the rotating stirring drum (2), and after installation, the mechanical interference and rotational balance of each heating partition are checked by low-speed rotation.

4. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: The cylindrical arc-shaped heating and insulation module (3) includes, in sequence from the cylinder wall facing the rotating stirring cylinder (2) to the direction away from the cylinder wall, a flexible heat-conducting pad (11), a heat-spreading plate (12), a flexible electric heating layer (13), an electrical insulation layer (14), an insulation layer (15), a grounding shielding layer (16), and a protective shell (17); the module temperature sensor (18) is located in the adjacent area of ​​the heat-spreading plate (12) and / or the flexible electric heating layer (13).

5. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: In step two, the track sliding seat (21) is first installed into the circumferential clamping track (5), and then the cylinder arc heating and insulation module (3) is locked to the track sliding seat (21) by the quick lock (22). Anti-detachment safety pins (23) and axial stop pieces (24) are set respectively. The adjustable elastic tensioning piece (29) is connected between the two adjacent circumferential clamping tracks (5) to apply a pre-tightening force towards the cylinder wall to the cylinder arc heating and insulation module (3).

6. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 3, characterized in that: The multi-channel conductive slip ring (6) is coaxially arranged with the rotation axis of the rotating stirring drum (2). The multi-channel conductive slip ring (6) includes a slip ring stator (31) and a slip ring rotor (32) that rotate relative to each other, as well as an electrically isolated power channel (33), a signal channel (34), and a protective grounding channel. The power channel (33) supplies power to each heating zone, and the signal channel (34) transmits the temperature measurement signal of the module temperature sensor (18) to the fixed side.

7. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: In step five, the controller (40) acquires the temperature measurement signal of the module temperature sensor (18) through the temperature acquisition unit (39), and acquires the detection signals of the ambient temperature sensor (41) and the stirring drum speed sensor (43); when the temperature of the heating zone is lower than the lower limit of the target temperature range, the heating power of the heating zone is increased; when the temperature of the heating zone enters the target temperature range, the heating power is reduced or intermittently output; when the temperature of the heating zone reaches the upper limit of the target temperature range, the heating of the heating zone is stopped; and the discharge temperature is detected by the discharge temperature sensor (42) when discharging.

8. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: In step two, multiple front cone petal-shaped heating and insulation modules (4) are installed in the front cone area of ​​the rotating mixing drum (2). The multiple front cone petal-shaped heating and insulation modules (4) are arranged symmetrically around the front cone annular base (45) and are connected to the front cone annular base (45) through petal module hinges (46). The sides of the front cone petal-shaped heating and insulation modules (4) are tightened to the edge of the front cone annular base (45) through petal module elastic tensioning parts (47). Adjacent front cone petal-shaped heating and insulation modules (4) are overlapped through petal module overlapping skirts (48) and are wrapped around the outer periphery of the multiple front cone petal-shaped heating and insulation modules (4) by front cone annular safety cables (50).

9. The construction method of the electric heating and insulation concrete transportation system for tanks in frigid environments according to claim 1, characterized in that: A fixed tank opening insulation cover (51) is installed on the outside of the rear feeding and discharging mechanism (10). The fixed tank opening insulation cover (51) is installed on the rear fixed frame (52) through the obstacle release hinge (53), and in the closed position, it forms a safe gap (60) with the opening of the rotating stirring drum (2) through a non-contact labyrinth seal (57). Only after the fixed tank opening insulation cover (51) is in the preset closed position and the position detection and safety lock (59) confirm the closed signal, the insulation cover heating layer (54) inside the fixed tank opening insulation cover (51) is allowed to be energized.

10. A concrete transport system with electric heating and insulation in tanks for use in extremely cold environments, characterized in that: The concrete transport system with electric heating and insulation in tanks for use in extremely cold environments, as described in any one of claims 1-9, was constructed using this method.

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