Mobile cement curing system and cement curing method thereof

Abstract

The present invention discloses a mobile cement curing system and a curing method thereof: the system comprises a first-layer transport unit, a second-layer mixing and unloading unit, a cement feeding unit and a control room unit, a sealed shielding door is provided on each side of the first-layer transport unit, and a plurality of sealed shielding doors are also provided inside the first-layer transport unit, and the sealed shielding doors on both sides are respectively connected to the outside of the first-layer transport unit through a section of conveying roller. The mobile cement curing system disclosed by the present invention is easy to assemble and disassemble, and can be used repeatedly in different nuclear power plants according to needs, breaking through the site restrictions, greatly improving the utilization rate of the cement curing system, and at the same time greatly reducing the radioactive waste generated during the decommissioning process of the cement curing plant, significantly reducing the final disposal cost of the waste to a certain extent, and having extremely high environmental, social and economic benefits.

Description

Technical Field

[0001] The invention belongs to the field of radioactive waste disposal, and in particular relates to a mobile cement solidification system and a cement solidification method thereof in the field. Background Art

[0002] Due to the particularity and sensitivity of radioactive waste, its treatment and disposal have always been a matter of great concern to the public. At present, cement solidification treatment processes are generally used for the in-plant treatment of medium- and low-level radioactive solid waste in domestic pressurized water reactor nuclear power projects in operation and under construction, and fixed cement solidification technology has become relatively mature. However, there are many site restrictions for building a cement solidification line, a long construction period and high construction costs. At the same time, more time and cost must be invested in the decommissioning of the cement solidification plant, which will increase more radioactive waste. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a mobile cement curing system and a cement curing method which can be repeatedly used.

[0004] The present invention adopts the following technical solution:

[0005] A mobile cement curing system, the improvement of which is that it comprises a first-layer transport unit, a second-layer mixing and unloading unit, a cement feeding unit and a control room unit, the first-layer transport unit is provided with a sealed shielding door on both sides, and a plurality of sealed shielding doors are also provided inside, the sealed shielding doors on both sides are connected to the outside of the first-layer transport unit through a section of conveying roller respectively, and the sealed shielding doors inside the first-layer transport unit are also connected to each other through an independent section of conveying roller respectively, in addition, a cleaning device is provided on the conveying roller between the sealed shielding door on one side and the adjacent sealed shielding door; the second-layer mixing and unloading unit is on the top of the first-layer transport unit, two sealed doors leading to the first-layer transport unit are provided at the bottom of the second-layer mixing and unloading unit, a unloading assembly and a mixing drive assembly are installed above one of the sealed doors, a sealing cover assembly is installed above the other sealed door, an exhaust gas treatment assembly is provided on the top of the second-layer mixing and unloading unit, and the exhaust gas treatment assembly is connected to the on-site exhaust gas treatment system; the cement feeding unit is connected to the unloading assembly in the second-layer mixing and unloading unit; the control room unit comprises a power distribution device for supplying power to the system and controlling the operation of the system, and an upper computer monitoring device for the operation of the control system and the monitoring system.

[0006] Furthermore, two sealed shielding doors are provided inside a first-layer transport unit. The four sealed shielding doors of a first-layer transport unit have the same structure and all include a shielding door frame. A motor screw device is installed on the top of the shielding door frame, and a shielding door is installed in the shielding door frame. An inflatable and deflable sealing ring is installed on the edge of the shielding door. The shielding door is pulled up and down in the shielding door frame by the motor screw device. After the shielding door falls and its sealing ring is inflated, it can seal the side of the first-layer transport unit where it is located.

[0007] Furthermore, there are five sections of conveyor rollers, three of which are inside a first-layer transport unit and two of which are outside a first-layer transport unit. Each section of the conveyor rollers includes a roller frame, and a plurality of rollers are provided on the upper surface of the roller frame. Side baffles are provided on the sides of each roller. A roller motor is installed in the roller frame, and the roller motor drives each roller to rotate through a single-sided double chain. Adjustable feet are installed at the bottom of the roller frame. The adjustable feet of the three sections of the conveyor rollers inside the first-layer transport unit are fixed on the box floor of the first-layer transport unit, and the adjustable feet of the two sections of the conveyor rollers outside the first-layer transport unit are fixed to the ground through anchor plates.

[0008] Furthermore, the spacing between adjacent rollers is designed according to the size of the paddle-free curing barrel, ensuring that there are no less than three rollers underneath the paddle-free curing barrel to support it at any time.

[0009] Furthermore, the cleaning device includes a main body bracket, on which a cleaning system and a purge system are installed. The cleaning system is connected to the on-site pressurized water system through a main water pipe inlet, and several layers of water outlets are arranged on its four oblique branch pipes. A liquid receiving pan is provided on the box floor of a transport unit opposite to the cleaning device, and the liquid receiving pan is connected to the waste water tank. The purge system is connected to the on-site compressed air system through a main air pipe inlet, and several layers of air outlets are arranged on its two lateral branch pipes.

[0010] Furthermore, a slot and a slide rail matching with the bottom of the second-layer mixing and unloading unit are laid on the top of the first-layer transport unit.

[0011] Furthermore, the unloading assembly includes a supporting platform, a cement silo is installed on the top of the supporting platform, the cement silo is docked with the cement feeding unit, a level meter is installed in the cement silo, a unloading pipe is arranged at the bottom of the cement silo, the connection and disconnection between the cement silo and the unloading pipe is controlled by an electromagnetic valve, part of the pipeline of the unloading pipe is a hose, and a clearing device is installed on the unloading pipe.

[0012] Furthermore, the stirring drive assembly includes a main body bracket, an X-platform is installed on the main body bracket, the X-platform includes two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a Y-platform is installed between the two sliders, the Y-platform includes two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a top plate is installed between the two sliders, a plurality of lifting cylinders are installed on the top plate, the cylinder rod of each lifting cylinder is downward, and a lifting assembly is installed between the bottoms of each cylinder rod, and there is also a lifting assembly between the lifting assembly and the top plate. It is connected by several connecting rods, and a cover plate is arranged on the top of each connecting rod. When the lifting assembly falls to the lower limit, each cover plate is attached to the top plate. A rotary alignment device is installed on the lifting assembly. A stirring motor, a feed docking port and a waste liquid exhaust docking port are installed on the rotary alignment device. The stirring paddle driving head of the stirring motor is downward and elastically retractable. The top of the feed docking port is docked with the discharge pipe of the discharge assembly. The waste liquid exhaust docking port is respectively connected to the waste liquid pipe on the wall of the second-floor stirring and discharge unit and the tail gas treatment assembly on the top. The waste liquid pipe is connected to the wastewater tank. The bottom docking ends of the feed docking port and the waste liquid exhaust docking port are elastic tubes facing downward and with sealing rings.

[0013] Furthermore, the outer edge of the rotary alignment device is a toothed disc structure, which meshes with a pinion gear, and the pinion gear is driven by a small servo motor installed on the lifting assembly.

[0014] Furthermore, the stirring drive assembly is also equipped with an industrial camera, a proximity switch, a high-definition camera and a lighting lamp.

[0015] Further, the capping assembly includes a main support, an X-platform is installed on the main support, the X-platform includes two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a Y-platform is installed between the two sliders, the Y-platform includes two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a top plate is installed between the two sliders, a plurality of lifting cylinders are installed on the top plate, the cylinder rod of each lifting cylinder is downward, and a lifting assembly is installed between the bottoms of each cylinder rod, the lifting assembly and the top plate are also connected by a plurality of connecting rods, a cover plate is arranged on the top of each connecting rod, and each cover plate is attached to the top plate when the lifting assembly falls to the lower limit, a rotation alignment device is installed on the lifting assembly, two small servo motors with power output shafts pointing downward and a water inlet are installed on the rotation alignment device, and a capping terminal is installed at the bottom of the power output shafts of the two small servo motors.

[0016] Furthermore, the capping terminal is elastic and can be retracted, a groove is arranged at the end of the capping terminal, and a steel ball with a spring is arranged on each opposite side of the groove; the shape of the lid of the paddle-discarding curing barrel corresponds to the capping terminal, and ribs corresponding to the groove at the end of the capping terminal are arranged on the lid, and a ball groove corresponding to the steel ball in the groove at the end of the capping terminal is arranged on each side of the rib.

[0017] Furthermore, the exhaust gas treatment component is composed of an exhaust gas valve and a pipeline.

[0018] Furthermore, the cement feeding unit includes a cement charging bin, a screw conveyor and a dredging device. The cement charging bin is connected to the feeding assembly in the second-layer mixing and feeding unit through the screw conveyor. The dredging device is a vibration device on the pipeline.

[0019] Furthermore, the control room unit has a reserved interface that can be connected to other computers via an aviation plug cable.

[0020] A cement curing method, using the above-mentioned mobile cement curing system, is improved in that it comprises the following steps:

[0021] (1) Place the paddle-discarded curing barrel on the conveyor roller outside the sealed shielding door on the side of the transport unit away from the cleaning device on the first floor;

[0022] (2) Start the conveyor roller and open the first sealed shield door in front of the paddle-discarding curing barrel, and close the sealed shield door after the paddle-discarding curing barrel passes through the sealed shield door;

[0023] (3) The conveyor roller continues to run and opens another sealed shield door in front of the discarded paddle curing barrel, and closes the sealed shield door after the discarded paddle curing barrel passes through the sealed shield door;

[0024] (4) The conveyor roller conveys the paddle-type solidification barrel to the bottom of the cover-taking assembly and stops running. The sealing door at the bottom of the cover-taking assembly of the second-layer mixing and unloading unit is opened. The cover of the feed inlet and the waste liquid exhaust port on the top of the paddle-type solidification barrel is removed by the cover-taking assembly, and water is added to the paddle-type solidification barrel.

[0025] (5) Start the conveyor roller to deliver the paddle-type curing barrel to the bottom of the discharge assembly and the stirring drive assembly, then stop the operation, open the sealed doors at the bottom of the discharge assembly and the stirring drive assembly of the second-layer stirring discharge unit, and add materials to the paddle-type curing barrel through the feed port at the top of the paddle-type curing barrel by the discharge assembly. The waste liquid and waste gas in the paddle-type curing barrel are discharged through the waste liquid exhaust port, wherein the waste liquid is discharged into the waste water tank, and the waste gas is discharged into the exhaust gas treatment assembly. The stirring drive assembly drives the three-layer fan blades in the paddle-type curing barrel to rotate through the drive spline groove of the paddle-type curing barrel to stir the inside of the paddle-type curing barrel;

[0026] (6) Start the conveyor roller to deliver the paddle-type solidification barrel to the bottom of the cover-taking assembly and then stop running, open the sealing door at the bottom of the cover-taking assembly of the second-layer mixing and unloading unit, and use the cover-taking assembly to re-cover the lids of the feed inlet and waste liquid exhaust port on the top of the paddle-type solidification barrel;

[0027] (7) Open the sealed shield door between the cleaning device and the paddle-discarding curing barrel, start the conveyor roller to deliver the paddle-discarding curing barrel to the cleaning device, and close the conveyor roller and the sealed shield door opened above;

[0028] (8) The paddle-discarding curing barrel is inspected, cleaned and purged by the cleaning device;

[0029] (9) Open the sealed shield door in front of the discarded paddle curing barrel and start the conveyor roller, and send the discarded paddle curing barrel to the unloading position on the conveyor roller outside the sealed shield door on the side of the transport unit near the cleaning device on the first floor, and close the conveyor roller and the opened sealed shield door;

[0030] (10) Remove the discard paddle curing barrel from the conveyor roller.

[0031] The beneficial effects of the present invention are:

[0032] With the continuous improvement of nuclear power plant waste treatment technology and management level, and the increasingly stringent national laws and regulations and standards, it is necessary to adopt various effective means to reduce the amount of final radioactive solid waste generated. The mobile cement curing system disclosed in the present invention is easy to assemble and disassemble, and can be used repeatedly in different nuclear power plants as needed, breaking through site limitations, greatly improving the utilization rate of the cement curing system, and greatly reducing the radioactive waste generated during the decommissioning of the cement curing plant, significantly reducing the final waste disposal costs to a certain extent, and has extremely high environmental, social and economic benefits.

[0033] The cement solidification method disclosed in the present invention uses a paddle-discarding solidification barrel for stirring inside the barrel, which solves the blockage problem caused by cement compaction during stirring outside the barrel, can extend the service life of the system, reduce maintenance costs, and ensure safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a mobile cement curing system;

[0035] Figure 2 It is a schematic diagram of the internal structure of the mobile cement curing system;

[0036] FIG3( a ) is a schematic diagram of the front structure of a sealed shielding door in a first-floor transport unit of a mobile cement curing system;

[0037] FIG3( b ) is a schematic diagram of the back structure of the sealed shielding door in the first-floor transport unit of the mobile cement curing system;

[0038] Figure 4 It is a schematic diagram of the structure of the conveyor roller in the first-layer transport unit of the mobile cement curing system;

[0039] Figure 5 It is a schematic diagram of the structure of the cleaning device in the first-layer transport unit of the mobile cement curing system;

[0040] Figure 6 It is a structural schematic diagram of a feeding assembly and a stirring drive assembly in a second-layer stirring feeding unit of a mobile cement curing system;

[0041] Figure 7 It is a structural schematic diagram of a rotary alignment device in a stirring drive assembly of a mobile cement curing system;

[0042] Figure 8 It is a schematic diagram of the structure of the paddle-abandoned curing barrel;

[0043] FIG9( a ) is a schematic diagram of the structure of the cover assembly in the second-layer mixing and unloading unit of the mobile cement curing system I;

[0044] FIG9( b ) is a structural schematic diagram II of the cover assembly in the second-layer mixing and unloading unit of the mobile cement curing system;

[0045] Fig.10 It is a structural schematic diagram of a cap removal terminal in a mobile cement curing system cap removal assembly;

[0046] Fig.11 It is a schematic diagram of the structure of the paddle-discarding curing barrel cover;

[0047] Fig.12 It is a flow chart of cement curing method.

[0048] Figure numerals: 1-layer transport unit, 2-second layer mixing and unloading unit, 3-cement feeding unit, 4-control room unit, 5-conveying roller, 6-cleaning device, 7-sealed shielding door, 8-unloading assembly, 9-mixing drive assembly, 10-capping assembly, 11-exhaust treatment assembly, 12-cement charging silo, 13-power distribution and PLC control system, 14-upper computer monitoring equipment, 15-barrel filling station, 16-transition station, 17-capping station, 18-mixing and unloading station, 19-cleaning and purging station, 20-barrel unloading station, 21-roller frame, 22-adjustable feet, 23-roller, 24-side baffle, 25-roller motor, 26-ground plate, 27-cleaning system, 28-purging system, 29-main bracket, 30-water pipe main inlet, 31-32-33-34-35-36-37-38-39-40-41-42-43-44-45-47-48-48-49-50-51-52-53-54-55-56-57-58-59-60-61-62-63-64-65-66-67-68-67-68-68-69-71 ... 1—air pipe main inlet, 32—shielding door frame, 33—shielding door, 34—motor screw device, 35—discarded paddle curing barrel, 36—driving spline groove, 37—feeding port, 38—waste liquid exhaust port, 39—cement silo, 40—feeding pipe, 41—dredging device, 42—support platform, 43—main bracket, 44—X platform, 45—Y platform, 46—lifting component, 47—rotation alignment device, 48—mixing motor, 49—lifting cylinder, 50—cover plate, 51—top plate, 52—toothed disc structure, 53—small servo motor, 54—pinion, 55—feeding interface, 56—waste liquid exhaust interface, 57—mixing paddle driving head, 58—capping terminal, 59—water inlet, 60—end, 61—lid, 62—steel ball, 63—ball groove. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] Embodiment 1, as Figure 1 As shown in Figure 2, this embodiment discloses a mobile cement curing system, including a first-layer transport unit 1, a second-layer mixing and feeding unit 2, a cement feeding unit 3 and a control room unit 4. Each unit has a modular interface design, and process interconnection is achieved through lifting and fastening.

[0051] There is a sealed shield door 7 on each side of the first-layer transport unit, and two sealed shield doors are also arranged inside. The sealed shield doors on both sides are connected to the outside of the first-layer transport unit through a section of conveying roller 5, and the sealed shield doors inside the first-layer transport unit are also connected to each other through an independent conveying roller. In addition, a cleaning device 6 is arranged on the conveying roller between the sealed shield door on one side and the adjacent sealed shield door; the first-layer transport unit serves as the base layer of the mobile cement curing system, and is mainly responsible for the entry and exit of the paddle-discarding curing barrel and the transfer of workstations.

[0052] When in use, the second-layer mixing and unloading unit is on top of the first-layer transport unit to meet the requirements of long-term operation. Two sealed doors leading to the first-layer transport unit are opened at the bottom of the second-layer mixing and unloading unit. A unloading assembly 8 and a stirring drive assembly 9 are installed above one of the sealed doors. The unloading assembly unloads materials (water, ash, cement, etc.) into the paddle-type solidifying barrel, and the stirring drive assembly drives the three-layer fan blades in the paddle-type solidifying barrel to rotate so as to stir the inside of the paddle-type solidifying barrel. A sealing cap removal assembly 10 is installed above another sealed door. The unloading assembly, stirring drive assembly and sealing cap removal assembly can be installed on the bottom support frame of the second-layer mixing and unloading unit. An exhaust gas treatment component 11 is arranged on the top of the second-layer mixing and unloading unit. The exhaust gas treatment component consists of an exhaust valve and pipelines and is responsible for the exhaust gas emission of the system. The exhaust gas treatment component is connected to the on-site exhaust gas treatment system; the cement feeding unit and the control room unit use containers of the same specifications, and the cement feeding unit is connected to the unloading component in the second-layer mixing and unloading unit; the control room unit is equipped with a full set of power distribution and PLC control system 13 and upper computer monitoring equipment 14 for supplying power to the system and controlling the operation of the system. It can be directly used as an operation monitoring room, and interfaces of multiple commonly used protocols can also be reserved so as to be connected to other computers through aviation plug cables for remote monitoring.

[0053] As shown in Fig. 3 (a) and Fig. 3 (b), the four sealed shielding doors of the first-layer transport unit have the same structure, including a shielding door frame 32, a motor screw device 34 is installed on the top of the shielding door frame, a shielding door 33 is installed in the shielding door frame, and a sealing ring that can be inflated and deflated (not shown in the figure) is installed on the edge of the shielding door. The shielding door is pulled up and down in the shielding door frame by the motor screw device to open or close the shielding door. After the shielding door is closed, the sealing ring is inflated to ensure the airtightness of the shielding door, thereby sealing the side of the first-layer transport unit where it is located. The shielding door is allowed to be opened only after the sealing ring is deflated.

[0054] There are five sections of conveyor rollers, three of which are inside the first-floor transport unit and two are outside the first-floor transport unit, which divide the first-floor transport unit into five areas, which are further divided into six workstations, namely: barrel filling station 15, transition station 16, capping station 17, mixing and unloading station 18, cleaning and purging station 19 and barrel unloading station 20. The capping station and mixing and unloading station are in the same area.

[0055] like Figure 4As shown, the conveyor roller body is made of carbon steel, and each section of the conveyor roller includes a roller frame 21. A plurality of rollers 23 are arranged on the upper surface of the roller frame, and a side baffle 24 is arranged on the side of each roller. A roller motor 25 is installed in the roller frame, and the roller motor drives each roller to rotate through a single-sided double chain. An adjustable foot 22 is installed at the bottom of the roller frame. The adjustable feet of the three sections of the conveyor roller in the first-layer transport unit are fixed on the box floor of the first-layer transport unit, and the adjustable feet of the two sections of the conveyor roller outside the first-layer transport unit (i.e., the barrel loading and unloading stations) are fixed to the ground through anchor plates 26. The overall positioning adopts the method of anchor plates + expansion bolts. The anchor plates are first fixed to the ground with expansion bolts, and then the position and height are adjusted on the anchor plates. Welding is not used to facilitate movement.

[0056] The spacing between adjacent rollers is designed according to the size of the paddle-free curing barrel, ensuring that at any time there are no less than three rollers under the paddle-free curing barrel to support it.

[0057] like Figure 5 As shown, the cleaning device includes a main frame 29, on which a cleaning system 27 and a purging system 28 are installed. The cleaning system is connected to the on-site pressurized water system through a water pipe main inlet 30, and multiple layers of water outlets are arranged on its four oblique branch pipes to fully cover the surface of the discarded paddle type curing barrel. A liquid receiving tray is arranged on the box floor of a transport unit opposite to the cleaning device, and the liquid receiving tray is communicated with the waste water tank. The sprayed water washes the dirt on the surface of the discarded paddle type curing barrel and is discharged into the waste water tank through the liquid receiving tray. The purging system is connected to the on-site compressed air system through an air pipe main inlet 31, and multiple layers of air outlets are arranged on its two side branch pipes to clean the water droplets remaining attached to the surface of the discarded paddle type curing barrel.

[0058] A slot and a slide rail matching the bottom of the second-layer mixing and unloading unit are laid on the top of the first-layer transport unit for quick docking and alignment between the first-layer transport unit and the second-layer mixing and unloading unit. When the alignment is completed, the sealed door at the bottom of the second-layer mixing and unloading unit will be opened or closed under the control of the process flow to connect the first-layer transport unit and the second-layer mixing and unloading unit. The structure of the sealed door is similar to that of the sealed shielding door, which will not be described in detail here.

[0059] The second-layer mixing and unloading unit is the core unit of the mobile cement curing system. Figure 6, as shown in FIG7 , the material discharge assembly includes a support platform 42, a cement silo 39 is installed on the top of the support platform, the cement silo is connected to the cement feeding unit, a material level meter is installed in the cement silo to measure the cement capacity, a material discharge pipe 40 is arranged at the bottom of the cement silo, and the connection between the cement silo and the material discharge pipe is controlled by an electromagnetic valve (i.e., the start and stop of material discharge is controlled), and the upper end of the material discharge pipe is a hose (not shown in the figure) to cooperate with the small range movement of the stirring drive assembly. A dredging device 41 is also installed on the material discharge pipe, and the dredging device is mainly composed of a vibrator to avoid pipeline blockage.

[0060] The stirring drive assembly includes a main body support 43, on which an X platform 44 is installed. The X platform includes two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, and a Y platform 45 is installed between the two sliders. The two lead screws of the X platform rotate synchronously so that the two sliders on the X platform can slide along the X-axis direction with the Y platform. The Y platform includes two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, and a top plate 51 is installed between the two sliders. The two lead screws of the Y platform rotate synchronously so that the two sliders on the Y platform can slide along the Y-axis direction with the top plate.

[0061] The servo motors driving the sliders on the X-platform and Y-platform lead screws have 17-bit absolute encoders, which can control the slider positions with high precision according to PLC instructions, thereby fine-tuning the top plate in the main bracket in the X-Y axis direction to correct the concentric deviation of the following rotary alignment device during the alignment process.

[0062] Two sets of lifting cylinders 49 are installed on the top plate, with the cylinder rods of each lifting cylinder facing downward, and a lifting assembly 46 is installed between the bottoms of each cylinder rod, and the lifting assembly is driven to rise and fall together when the cylinder rods are extended and retracted. The lifting assembly is also connected to the top plate through four connecting rods, and a cover plate 50 is arranged on the top of each connecting rod. When the lifting assembly falls to the lower limit, each cover plate is attached to the top plate to ensure that the lifting assembly will not fall to the lower layer as a whole in the event of loss of air source or abnormal position control.

[0063] A rotary alignment device 47 is installed on the lifting assembly. When the lifting assembly falls to the lower limit, the bottom of the rotary alignment device just presses on the top of the paddle-discarding curing barrel. The outer edge of the rotary alignment device is a toothed disc structure 52, which meshes with a pinion 54. The pinion is driven by a small servo motor 53 installed on the lifting assembly. A stirring motor 48, a feed interface 55 and a waste liquid exhaust interface 56 are installed on the rotary alignment device. The small servo motor drives the pinion to rotate and drives the toothed disc structure to rotate, thereby realizing the mechanical visual alignment of the stirring motor stirring paddle driving head, the feed interface and the waste liquid exhaust interface with the drive spline groove, the feed port and the waste liquid exhaust port on the paddle-discarding curing barrel.

[0064] The stirring motor installed in the middle of the rotary alignment device is a stirring paddle variable frequency drive motor, which is speed-regulated and direction-controlled by a frequency converter, and its stirring paddle drive head 57 is downward and elastically retractable. When the lifting assembly falls to the lower limit and the stirring paddle drive head of the stirring motor does not match the driving spline groove position of the discarded paddle curing barrel, the stirring paddle drive head will be compressed and shortened. After the stirring motor is started at an extremely low speed, its stirring paddle drive head will automatically pop out and insert into it when it rotates to the position where it docks with the driving spline groove. The top of the feed docking interface docks with the feeding pipe of the feeding assembly, and the waste liquid exhaust docking interface is respectively connected to the waste liquid pipe on the wall of the second-floor stirring and feeding unit and the tail gas treatment assembly on the top. The waste liquid pipe is connected to the waste water tank. The bottom docking ends of the feed docking interface and the waste liquid exhaust docking interface are both downward elastic tubes with sealing rings. When the lifting assembly falls to the lower limit, the two elastic tubes are compressed, and their sealing rings overlap and compact with the feed port and waste liquid exhaust port on the top of the discarded paddle curing barrel to form a certain seal.

[0065] like Figure 8 As shown, the paddle shaft of the agitator paddle is located in the middle of the paddle-discarding curing barrel 35, and three layers of fan blades are connected to the paddle shaft (the fan blades are inside the barrel, not shown in the figure). The top of the paddle-discarding curing barrel has a driving spline groove 36 of the paddle shaft, a feed inlet 37 and a waste liquid exhaust port 38, and covers are also provided on the feed inlet and the waste liquid exhaust port.

[0066] The stirring drive assembly is also equipped with an industrial camera for rotational alignment, a proximity switch for detecting contact with the top of the paddle-discarding curing barrel, a high-definition camera and a lighting lamp for monitoring the alignment accuracy and the insertion status of the stirring paddle drive head.

[0067] The operator can observe the rotation of the rotary alignment device through the upper computer screen in the control room unit, and can view the docking status of each interface in real time through video monitoring. By performing image and pixel analysis on the captured images, the contours and center points of the three circular holes of the drive spline slot, feed port and waste liquid exhaust port on the top of the discarded paddle curing barrel, as well as the center coordinates of the drive spline slot can be identified. A horizontal line is drawn through the center of the circle to measure the angle between the concentric lines of the three circular holes and the horizontal line. The center coordinates of the drive spline slot are the target position to which the rotary alignment device is to move in the X-Y axis direction, ensuring that the stirring paddle drive head of the stirring motor can be smoothly inserted into the drive spline slot after the lifting assembly falls. The angle between the concentric line and the horizontal line is the angle at which the rotary alignment device needs to rotate horizontally, ensuring that the feed docking interface and the waste liquid exhaust docking interface can be well compacted and docked to the feed port and waste liquid exhaust port on the top of the discarded paddle curing barrel after the lifting assembly falls.

[0068] As shown in Fig. 9 (a) and Fig. 9 (b), the capping assembly includes a main support, an X platform is installed on the main support, the X platform includes two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a Y platform is installed between the two sliders, the Y platform includes two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a top plate is installed between the two sliders, a plurality of lifting cylinders are installed on the top plate, the cylinder rod of each lifting cylinder is downward, and a lifting assembly is installed between the bottoms of each cylinder rod, the lifting assembly and the top plate are also connected by a plurality of connecting rods, a cover plate is arranged on the top of each connecting rod, and each cover plate is attached to the top plate when the lifting assembly falls to the lower limit, a rotation alignment device is installed on the lifting assembly, two small servo motors with power output shafts pointing downward and a water inlet 59 are installed on the rotation alignment device, and a capping terminal 58 is installed at the bottom of the power output shafts of the two small servo motors. Two small servo motors are used to drive two capping terminals to respectively take off and seal the lids of the feed inlet and the waste liquid exhaust port at the top of the paddle-discarding curing barrel.

[0069] The positioning and rotation structures of the capping assembly and the stirring drive assembly are similar, most components can use the same spare parts, and the working principles and processes are basically the same, which will not be repeated here.

[0070] The terminal for removing the cap is elastic and can be stretched, such as Fig.10 As shown, a groove is provided at the end 60 of the terminal for removing the sealing cap, and a steel ball 62 with a spring is provided on each of the opposite sides of the groove; Fig.11 As shown, the shape of the lid 61 of the paddle-discarding curing barrel corresponds to the terminal for removing the cap, and a rib corresponding to the groove at the end of the terminal for removing the cap is provided on the lid, and a ball groove 63 corresponding to the steel ball in the groove at the end of the terminal for removing the cap is provided on both sides of the rib. When the end of the terminal for removing the cap contacts the lid, the terminal for removing the cap is compressed and retracted, and after the small servo motor is started at a low speed, when the end rotates to the position where its groove docks with the rib of the lid, it will automatically pop out and snap into it, and at the same time, the steel ball with a spring in the groove is also stuck in the ball grooves on both sides of the rib of the lid, and then the small servo motor can be started at a normal speed to remove the lid, and the capping process is the opposite of the capping process. After the capping is completed, the rotary alignment device of the lifting assembly in the capping assembly rotates as a whole to a specific angle, and after the alignment and docking of the water inlet and the waste liquid exhaust port at the top of the paddle-discarding curing barrel are completed, water can be replenished.

[0071] The cement feeding unit includes a cement loading silo 12, a screw conveyor and a dredging device. The cement loading silo is connected to the unloading assembly in the second-layer mixing unloading unit through the screw conveyor. The screw conveyor needs to be arranged according to the on-site conditions and is not shown in the attached figure. The dredging device is a vibrating device on the pipeline. The cement feeding unit is mainly used for processes such as receiving, mixing and conveying liquid. The cement loading silo is responsible for loading dry cement. Similar to the commonly used cement loader, the screw conveyor is modular and segmented, and can be laid and installed according to the on-site conditions.

[0072] This embodiment also discloses a cement curing method, using the above-mentioned mobile cement curing system, such as Fig.12 As shown, the following steps are included:

[0073] (1) Place the paddle-discarded curing barrel on the conveyor roller (barrel loading station) outside the sealed shield door on the first-floor transport unit away from the cleaning device;

[0074] (2) Start the conveyor roller and open the first sealed shield door (Door No. 1) in front of the abandoned paddle curing barrel. After the abandoned paddle curing barrel passes through the sealed shield door, close the sealed shield door (Door No. 1), and the abandoned paddle curing barrel enters the transition station;

[0075] (3) The conveyor roller continues to run and opens another sealed shield door (Door No. 2) in front of the discarded paddle curing barrel, and closes the sealed shield door (Door No. 2) after the discarded paddle curing barrel passes through the sealed shield door;

[0076] (4) The conveyor roller conveys the paddle-type curing barrel to the capping station below the capping assembly and stops running. The sealing door at the bottom of the capping assembly of the second-layer mixing and unloading unit is opened. The caps of the feed inlet and waste liquid exhaust port on the top of the paddle-type curing barrel are removed by the capping assembly, and water is added to the paddle-type curing barrel.

[0077] (5) Start the conveyor roller to deliver the paddle-type curing barrel to the stirring and unloading station below the unloading assembly and the stirring drive assembly, then stop running, open the sealed door at the bottom of the unloading assembly and the stirring drive assembly of the second-layer stirring and unloading unit, rotate and align, and open the solenoid valve. The unloading assembly feeds the paddle-type curing barrel through the feed port at the top of the paddle-type curing barrel, and the waste liquid and waste gas in the paddle-type curing barrel are discharged through the waste liquid exhaust port, wherein the waste liquid is discharged into the waste water tank, and the waste gas is discharged into the exhaust gas treatment assembly. The stirring drive assembly drives the three-layer fan blades in the paddle-type curing barrel to rotate through the drive spline groove of the paddle-type curing barrel to stir the inside of the paddle-type curing barrel;

[0078] (6) Start the conveyor roller to deliver the paddle-type solidification barrel to the capping station below the capping assembly and then stop running, open the sealing door at the bottom of the capping assembly of the second-layer mixing and unloading unit, and use the capping assembly to re-cover the lids of the feed inlet and waste liquid exhaust port on the top of the paddle-type solidification barrel (capping);

[0079] (7) Open the sealed shield door (Door 3) between the cleaning device and the discarded paddle curing barrel, start the conveyor roller to transport the discarded paddle curing barrel to the cleaning and purge station at the cleaning device, and close the conveyor roller and the sealed shield door (Door 3) opened above;

[0080] (8) The paddle-discarding curing barrel is inspected, cleaned and purged by the cleaning device;

[0081] (9) Open the sealed shield door (Door 4) in front of the discarded paddle curing barrel and start the conveyor roller to transport the discarded paddle curing barrel to the unloading station on the conveyor roller outside the sealed shield door on the side of the transport unit near the cleaning device on the first floor, and close the conveyor roller and the opened sealed shield door (Door 4);

[0082] (10) Remove the discard paddle curing barrel from the conveyor roller.

Claims

1. A mobile cement curing system, characterized in that: It includes a first-floor transport unit, a second-floor mixing and unloading unit, a cement feeding unit and a control room unit. There is a sealed shield door on each side of the first-floor transport unit, and several sealed shield doors are also arranged inside. The sealed shield doors on both sides are connected to the outside of the first-floor transport unit through a section of conveying roller respectively, and the sealed shield doors inside the first-floor transport unit are also connected to each other through an independent conveying roller respectively. In addition, a cleaning device is arranged on the conveying roller between the sealed shield door on one side and its adjacent sealed shield door; the second-floor mixing and unloading unit is on the top of the first-floor transport unit, and two sealed doors leading to the first-floor transport unit are opened at the bottom of the second-floor mixing and unloading unit. A unloading assembly and a mixing drive assembly are installed above one of the sealed doors, and a sealing cover assembly is installed above the other sealed door. An exhaust gas treatment assembly is arranged on the top of the second-floor mixing and unloading unit, and the exhaust gas treatment assembly is connected to the on-site exhaust gas treatment system; the cement feeding unit is connected to the unloading assembly in the second-floor mixing and unloading unit; the control room unit includes a power distribution device for supplying power to the system and controlling the operation of the system, and an upper computer monitoring device for the control system and the monitoring system; The cleaning device includes a main frame, on which a cleaning system and a purge system are installed. The cleaning system is connected to the pressurized water system on site through a water pipe main inlet, and several layers of water outlets are arranged on its four oblique branch pipes. A liquid receiving tray is arranged on the box floor of a transport unit on one layer opposite to the cleaning device, and the liquid receiving tray is connected to the waste water tank. The purge system is connected to the compressed air system on site through a gas pipe main inlet, and several layers of gas outlets are arranged on its two side branch pipes. The material discharge assembly includes a support platform, a cement silo is installed on the top of the support platform, the cement silo is connected to the cement feeding unit, a material level meter is installed in the cement silo, a material discharge pipe is arranged at the bottom of the cement silo, the connection and disconnection between the cement silo and the material discharge pipe is controlled by a solenoid valve, part of the material discharge pipe is a hose, and a dredging device is installed on the material discharge pipe; The stirring drive assembly comprises a main body support, an X platform is installed on the main body support, the X platform comprises two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a Y platform is installed between the two sliders, the Y platform comprises two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a top plate is installed between the two sliders, a plurality of lifting cylinders are installed on the top plate, the cylinder rod of each lifting cylinder is downward, and a lifting assembly is installed between the bottoms of each cylinder rod, and a lifting assembly and the top plate are also connected by Several connecting rods are connected, and a cover plate is arranged on the top of each connecting rod. When the lifting assembly falls to the lower limit, each cover plate is attached to the top plate. A rotary alignment device is installed on the lifting assembly. A stirring motor, a feed docking port and a waste liquid exhaust docking port are installed on the rotary alignment device. The stirring paddle driving head of the stirring motor is downward and elastically retractable. The top of the feed docking port is docked with the discharge pipe of the discharge assembly. The waste liquid exhaust docking port is respectively connected to the waste liquid pipe on the wall of the second-floor stirring and discharge unit and the tail gas treatment assembly on the top. The waste liquid pipe is connected to the wastewater tank. The bottom docking ends of the feed docking port and the waste liquid exhaust docking port are elastic tubes facing downward and with sealing rings.

2. The mobile cement curing system according to claim 1, characterized in that: Two sealed shielding doors are arranged inside the first-layer transport unit. The four sealed shielding doors of the first-layer transport unit have the same structure and all include a shielding door frame. A motor screw device is installed on the top of the shielding door frame, and a shielding door is installed in the shielding door frame. An inflatable and deflable sealing ring is installed on the edge of the shielding door. The shielding door is pulled up and down in the shielding door frame by the motor screw device. After the shielding door falls and its sealing ring is inflated, the side of the first-layer transport unit where it is located can be sealed.

3. The mobile cement curing system according to claim 2, characterized in that: There are five sections of conveyor rollers in total, three of which are inside the first-floor transport unit and two are outside the first-floor transport unit. Each section of the conveyor rollers includes a roller frame. A plurality of rollers are provided on the upper surface of the roller frame. Side baffles are provided on the sides of each roller. A roller motor is installed in the roller frame. The roller motor drives each roller to rotate through a single-sided double chain. Adjustable feet are installed at the bottom of the roller frame. The adjustable feet of the three sections of the conveyor rollers inside the first-floor transport unit are fixed on the box floor of the first-floor transport unit, and the adjustable feet of the two sections of the conveyor rollers outside the first-floor transport unit are fixed to the ground through anchor plates.

4. The mobile cement curing system according to claim 3, characterized in that: The spacing between adjacent rollers is designed according to the size of the paddle-free curing barrel, ensuring that at any time there are no less than three rollers under the paddle-free curing barrel to support it.

5. The mobile cement curing system according to claim 1, characterized in that: A slot and a slide rail matching the bottom of the second-layer mixing and unloading unit are laid on the top of the first-layer transport unit.

6. The mobile cement curing system according to claim 1, characterized in that: The outer edge of the rotary alignment device is a toothed disc structure, which meshes with a pinion gear, and the pinion gear is driven by a small servo motor installed on the lifting assembly.

7. The mobile cement curing system according to claim 1, characterized in that: The stirring drive assembly is also equipped with an industrial camera, proximity switch, high-definition camera and lighting.

8. The mobile cement curing system according to claim 1, characterized in that: The capping assembly comprises a main support, an X platform is installed on the main support, the X platform comprises two lead screws arranged in parallel along the X-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a Y platform is installed between the two sliders, the Y platform comprises two lead screws arranged in parallel along the Y-axis direction, the two lead screws are driven by a servo motor to rotate synchronously, a slider is sleeved on each of the two lead screws, a top plate is installed between the two sliders, a plurality of lifting cylinders are installed on the top plate, the cylinder rod of each lifting cylinder is downward, and a lifting assembly is installed between the bottoms of each cylinder rod, the lifting assembly and the top plate are also connected by a plurality of connecting rods, a cover plate is arranged on the top of each connecting rod, and each cover plate is attached to the top plate when the lifting assembly falls to the lower limit, a rotation alignment device is installed on the lifting assembly, two small servo motors with power output shafts pointing downward and a water inlet are installed on the rotation alignment device, and a capping terminal is installed at the bottom of the power output shafts of the two small servo motors.

9. The mobile cement curing system according to claim 8, characterized in that: The capping terminal is elastic and can be retracted. A groove is arranged at the end of the capping terminal, and a steel ball with a spring is arranged on each of the opposite sides of the groove. The shape of the lid of the paddle-discarding curing barrel corresponds to the capping terminal, and a rib corresponding to the groove at the end of the capping terminal is arranged on the lid, and a ball groove corresponding to the steel ball in the groove at the end of the capping terminal is arranged on each of the two sides of the rib.

10. The mobile cement curing system according to claim 1, characterized in that: The exhaust gas treatment component consists of an exhaust valve and pipelines.

11. The mobile cement curing system according to claim 1, characterized in that: The cement feeding unit includes a cement loading bin, a screw conveyor and a dredging device. The cement loading bin is connected to the feeding assembly in the second-layer mixing and feeding unit through the screw conveyor. The dredging device is a vibration device on the pipeline.

12. The mobile cement curing system according to claim 1, characterized in that: The control room unit has a reserved interface that can be connected to other computers via aviation plug cables.

13. A cement curing method, using the mobile cement curing system according to claim 1, characterized in that: The steps include: (1) Place the paddle-discarded curing barrel on the conveyor roller outside the sealed shielding door on the side of the transport unit away from the cleaning device on the first floor; (2) Start the conveyor roller and open the first sealed shield door in front of the paddle-discarding curing barrel, and close the sealed shield door after the paddle-discarding curing barrel passes through the sealed shield door; (3) The conveyor roller continues to run and opens another sealed shield door in front of the discarded paddle curing barrel, and closes the sealed shield door after the discarded paddle curing barrel passes through the sealed shield door; (4) The conveyor roller conveys the paddle-type solidification barrel to the bottom of the cover-taking assembly and stops running. The sealing door at the bottom of the cover-taking assembly of the second-layer mixing and unloading unit is opened. The cover of the feed inlet and the waste liquid exhaust port on the top of the paddle-type solidification barrel is removed by the cover-taking assembly, and water is added to the paddle-type solidification barrel. (5) Start the conveyor roller to deliver the paddle-type curing barrel to the bottom of the discharge assembly and the stirring drive assembly, then stop the operation, open the sealed doors at the bottom of the discharge assembly and the stirring drive assembly of the second-layer stirring discharge unit, and add materials to the paddle-type curing barrel through the feed port at the top of the paddle-type curing barrel by the discharge assembly. The waste liquid and waste gas in the paddle-type curing barrel are discharged through the waste liquid exhaust port, wherein the waste liquid is discharged into the waste water tank, and the waste gas is discharged into the exhaust gas treatment assembly. The stirring drive assembly drives the three-layer fan blades in the paddle-type curing barrel to rotate through the drive spline groove of the paddle-type curing barrel to stir the inside of the paddle-type curing barrel; (6) Start the conveyor roller to deliver the paddle-type solidification barrel to the bottom of the cover-taking assembly and then stop running, open the sealing door at the bottom of the cover-taking assembly of the second-layer mixing and unloading unit, and use the cover-taking assembly to re-cover the lids of the feed inlet and waste liquid exhaust port on the top of the paddle-type solidification barrel; (7) Open the sealed shield door between the cleaning device and the paddle-discarding curing barrel, start the conveyor roller to deliver the paddle-discarding curing barrel to the cleaning device, and close the conveyor roller and the sealed shield door opened above; (8) The paddle-discarding curing barrel is inspected, cleaned and purged by the cleaning device; (9) Open the sealed shield door in front of the discarded paddle curing barrel and start the conveyor roller, and send the discarded paddle curing barrel to the unloading position on the conveyor roller outside the sealed shield door on the side of the transport unit near the cleaning device on the first floor, and close the conveyor roller and the opened sealed shield door; (10) Remove the discard paddle curing barrel from the conveyor roller.

Images