A solar-powered prefabricated bridge maintenance device

Abstract

This invention provides a solar-powered precast bridge maintenance device, comprising a maintenance shed, an outer solar thermal collector and storage unit, a conveying mechanism, and a controller, and an inner temperature and humidity control unit. The maintenance shed is constructed of double-layered heat-insulating and light-transmitting film or panels, and has a support platform at the bottom with a slot in the center. The solar thermal collector and storage unit includes a vacuum solar collector assembly, a water tank, a variable frequency circulating pump assembly, and several water-heated radiators. The vacuum solar collector assembly is installed on the top of the maintenance shed via mounting components and is connected to the variable frequency circulating pump assembly inside the water tank via a connecting pipe. The temperature and humidity control unit includes a spray assembly, a heat dissipation assembly, and a temperature and humidity sensor, which is fixedly installed on the inner wall of the maintenance shed. The beneficial effects include periodically spraying water mist onto the surface of the components to maintain the humidity of the maintenance environment, ensuring sufficient hydration of the components, and preventing early cracking.

Description

Technical Field

[0001] This invention is a solar-powered precast bridge maintenance device, belonging to the field of bridge precast component maintenance technology. Background Technology

[0002] Precast beam curing is a core process for ensuring concrete strength development and controlling early cracking, directly determining the mechanical properties and durability of bridge components. Currently, steam curing is widely used in engineering to shorten the precast cycle, but it has three major drawbacks: First, high energy consumption and emissions. Traditional steam curing relies on fossil fuels such as coal and natural gas, with energy costs accounting for 15%-25% of the precast beam production cost, resulting in high carbon emissions and failing to meet low-carbon construction requirements. Second, uneven curing quality. Steam diffusion easily leads to localized overheating and humidity stratification, resulting in significant strength dispersion in different parts of the beam and a high risk of early cracking. Third, poor adaptability. In remote areas of Northwest China, energy transportation costs are high, and the large diurnal temperature range and low winter temperatures drastically increase the operating costs and quality control difficulties of traditional curing processes.

[0003] Existing curing sheds are mostly fixed structures, with precast beams relying on gantry cranes for hoisting. This results in low efficiency, poor positioning accuracy, and prolonged opening of the shed doors during hoisting, causing significant fluctuations in temperature and humidity inside, interfering with the curing process. During beam transport, exposure to the external environment leads to rapid evaporation of surface moisture, easily causing early shrinkage cracks and further affecting component quality. Furthermore, existing sprinkler systems are mostly fixed-point arrangements, leaving blind spots at the bottom of beam flanges and corners of the web, resulting in poor uniformity of humidity distribution. Temperature-regulating fans are mostly fixed installations with limited airflow coverage, leading to temperature differences exceeding 5°C within the shed and insufficient temperature field uniformity. Therefore, these systems cannot meet the requirements for high-precision constant temperature and humidity curing. Summary of the Invention

[0004] In view of the shortcomings of existing technologies, the purpose of this invention is to provide a solar-powered prefabricated bridge maintenance device.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A solar-powered prefabricated bridge maintenance device includes a maintenance shed. The exterior of the shed is equipped with a solar thermal collector and storage unit, a conveying mechanism, and a controller. The interior of the shed contains a temperature and humidity control unit. The shed is constructed of double-layered heat-insulating and light-transmitting film or panels, and has a support platform at the bottom with a slot in the center. The solar thermal collector and storage unit includes a vacuum solar collector assembly, a water tank, a variable frequency circulating pump assembly, and several water-cooled radiators. The vacuum solar collector assembly is installed on the top of the shed via mounting components and is connected to the variable frequency circulating pump assembly inside the water tank via a connecting pipe. Temperature and humidity control... The unit includes a spray assembly, a heat dissipation assembly, and a temperature and humidity sensor. The temperature and humidity sensor is fixedly installed on the inner wall of the curing shed. The spray assembly consists of a top wall spray group and a side wall spray group. The top wall spray group is connected to the variable frequency circulating pump group through a third water delivery pipe, and the side wall spray group is connected to the variable frequency circulating pump group through a first water delivery pipe and a second water delivery pipe. The heat dissipation assembly is installed below the side wall spray group. The conveying mechanism is installed on one side of the opening end of the support platform. A placement plate is provided at the bottom of the beam, and the bottom of the placement plate is mechanically connected to the conveying plate of the conveying mechanism. The controller is electrically connected to the solar thermal collection and storage unit, the temperature and humidity control unit, and the conveying mechanism.

[0007] Furthermore, the maintenance shed is a closed, elongated shed, and from the outside to the inside are an outer light-transmitting and heat-insulating layer, a middle air-conditioning and heat-collecting layer, and an inner light-transmitting and heat-collecting layer. The two ends of the shed are equipped with openable and closable sealed end doors.

[0008] Furthermore, the water-heated radiator is located on both sides of the maintenance shed, and the water inlet is connected to the variable frequency circulating pump set installed in the water tank through a circulation pipeline.

[0009] Furthermore, beams are provided on both sides of the top of the maintenance shed, and the top wall spraying assembly is installed on the beams. The top wall spraying assembly includes a main delivery pipe, which is installed on the top of the maintenance shed through a bracket. Several bottom pipes are connected to the bottom of the main delivery pipe, which penetrates the maintenance shed and is connected to the top wall water storage tank installed on the top wall of the maintenance shed. Several spraying branch pipes are connected to the bottom of the top wall water storage tank, and the spraying branch pipes are connected to the spraying drive unit installed on the beams.

[0010] Furthermore, the spray drive unit includes a support plate, an inverted U-shaped platform on one side of the top of the support plate, support plates on both sides of the top of the inverted U-shaped platform and at both ends of the other side of the top of the support plate, the top of the support plate being fixed to the bottom of the beam frame, a second motor being located at the bottom of the support plate below the inverted U-shaped platform, an output shaft being connected to the output end of the second motor, the output shaft passing through the support plate and the inverted U-shaped platform and connected to the main pulley located at the top of the inverted U-shaped platform, several pads being located at the center of the top of the support plate, a secondary pulley being located at the top of the pads, the secondary pulley being connected to the main pulley via a belt, a central shaft being inserted through the middle of the secondary pulley, the central shaft passing through the pads and the support plate, a second atomizing nozzle being located at the bottom of the central shaft, a second bracket being located between the sides of adjacent pads, a several limiting wheels being located on the upper part of the second bracket; several fixing blocks being evenly distributed on one side of the support plate, a first pipe joint being inserted through the middle of the fixing blocks, the bottom of the spray branch pipe being connected to the first pipe joint, a hose being connected to the other side of the first pipe joint, a second pipe joint being connected to the other side of the hose, and the other side of the second pipe joint being connected to the side of the second atomizing nozzle.

[0011] Furthermore, the side wall spraying assembly includes a set of brackets three, which are fixedly installed at both ends of the two sides of the curing shed. A side water storage tank is provided on the top of the side of the bracket near the inner wall of the curing shed. Water delivery pipe one and water delivery pipe two are respectively connected to the top of the adjacent side water storage tank. Several connecting channels two are provided on the top of the side water storage tank. Corrugated pipes are connected to the other side of the connecting channels two. Connecting pipe one is connected to the other side of the corrugated pipes. Atomizing nozzle one is connected to the other side of the connecting pipe one. Horizontal plates are provided between the upper and lower parts of the corresponding sides of the two brackets three. The upper and lower parts of the inner side of one bracket three are respectively provided with an upper fixing plate and a lower fixing plate one. The upper and lower parts of the inner side of the other bracket three are respectively provided with an L-shaped seat and a lower fixing plate two. The heat dissipation component is fixed horizontally between the lower fixing plate one and the lower fixing plate two. A vertical plate is provided on the side of the L-shaped seat away from the bracket three. Guide rods are provided horizontally between the vertical plate and the upper fixing plate and the lower fixing plate one. Moving parts are provided on the guide rods. Connecting pipe one passes through the upper part of the vertical plate and the moving parts.

[0012] Furthermore, the moving component includes several first moving plates sleeved on the guide rod. Both the first moving plates and the upright plate are provided with straight grooves. The lower part of the upright plate near the support three is provided with a lower protrusion. The side of the lower protrusion away from the upright plate is provided with a micro driver. The output end of the micro driver is connected to a lead screw two. The top of the lead screw two is movably connected to an L-shaped seat. The lead screw two is sleeved with a threaded internal thread block. The side of the internal thread block near the upright plate is provided with a folding structure. The folding structure is composed of several intersecting drive arms one and drive arms two. The lower intersecting end is provided with a limiting rod that slides with the straight groove. The upper intersecting end is movably connected to the upper side of the corresponding upright plate and the first moving plate.

[0013] Furthermore, the heat dissipation assembly includes a motor, a lead screw, several stops, and an auxiliary temperature control mechanism; the lead screw passes horizontally between the lower part of the lower fixed plate and the middle part of the lower fixed plate, the input end of the lead screw is connected to the motor, the motor is fixedly installed on the lower outer side of the lower fixed plate, the auxiliary temperature control mechanism is sleeved on the lead screw, and a set of stops is provided between adjacent auxiliary temperature control mechanisms.

[0014] Furthermore, the auxiliary temperature control mechanism includes an internally threaded sleeve that is threaded to the lead screw. The outer wall of the internally threaded sleeve is provided with several sets of support plates, and a drive rod is provided between the support plates. A connecting rod is provided on the side of the drive rod away from the support plate. An adjustment plate is eccentrically provided on the side of the connecting rod away from the drive rod. A heating element and a temperature detector are provided in the adjustment plate. Several air outlets are evenly provided around the side of the adjustment plate away from the connecting rod. An exhaust channel is connected to the air outlet. A waterproof and breathable membrane is provided at the outlet end of the exhaust channel. An installation groove is provided in the middle of the side of the adjustment plate away from the connecting rod. A rotating disk is provided in the installation groove. Several fan blades are provided on the rotating disk. The inner wall of the internally threaded sleeve is provided with a snap-fit ​​groove, and a limiting protrusion adapted to the snap-fit ​​groove is provided on the surface of the lead screw.

[0015] Furthermore, the conveying mechanism includes a conveying platform, a conveying trough at the top center of the conveying platform, a fixed toothed plate at the center of the bottom wall of the conveying trough, L-shaped plates symmetrically arranged on both sides of the bottom wall of the conveying trough, several trapezoidal support plates on the L-shaped plates, several limiting rollers above the trapezoidal support plates located at the top of the side of the L-shaped plates, a second moving plate transversely arranged between the limiting rollers and the L-shaped plates, a side toothed plate on one side of the bottom of the second moving plate, a meshing gear on the side of the side toothed plate, the bottom of the gear being connected to a motor installed inside the conveying platform via a gear shaft; I-shaped track plates are provided on both sides of the top of the second moving plate, and a central section is provided... It has a central groove, with mounting plates on both sides of the central groove. A connecting shaft runs horizontally between the mounting plates. A gear two that meshes with a fixed toothed plate is fitted in the middle of the connecting shaft. A fixed toothed plate two that meshes with the gear two is located above the gear two. The top of the fixed toothed plate two is fixed to the center of the bottom of the conveyor plate. Side slide plates that slide with an I-shaped track plate are symmetrically located on both sides of the bottom of the conveyor plate. A cylinder is located at the center of the top of the conveyor plate. A telescopic rod is located inside the cylinder. Telescopic columns one is located on both sides of the top of the conveyor plate. Telescopic columns two that telescopically engage with each other are located inside the telescopic columns one. A magnetic plate is located on the top of the telescopic columns two. An armature is located at the bottom of the placement plate.

[0016] The beneficial effects of this invention are:

[0017] The curing shed adopts a three-layer light-transmitting and heat-insulating structure, which can absorb solar radiation to create a greenhouse effect; the double-layer hollow structure has excellent heat preservation performance, achieving efficient heating and constant temperature curing; at the same time, the water-heated radiator inside the curing shed is connected to the external water tank, which actively regulates the temperature inside the shed through circulating water to achieve auxiliary heating and ensure precise temperature control; and water mist is sprayed regularly on the surface of the components to maintain the humidity of the curing environment, ensuring that the components are fully hydrated and preventing early cracking.

[0018] Using solar energy as the core energy source, the vacuum solar collector group converts solar radiation into heat energy and stores it in a water tank, replacing the fossil energy consumption of traditional steam curing. This can reduce energy consumption costs in the curing process and significantly reduce carbon emissions. The greenhouse effect of the double-layer insulated shed can reduce heat loss and reduce the frequency of auxiliary heating, making it particularly suitable for construction scenarios in remote Northwest China where energy transportation costs are high.

[0019] A three-dimensional humidification system is adopted, featuring rotating top-wall spraying and adjustable side-wall spraying. Water mist covers the top surface and all sides of the beam, eliminating any spray dead zones. Combined with water-heated radiators and a movable auxiliary temperature control mechanism, the system forces air circulation within the greenhouse, eliminating temperature stratification and localized overheating. This keeps the temperature difference between the top and bottom of the greenhouse within a certain range, effectively reducing the risk of early cracking.

[0020] The controller automatically switches operating conditions by collecting temperature and humidity data in real time, which can adapt to various complex environments such as large temperature differences between day and night, low temperatures in winter, and continuous rain, ensuring stable maintenance efficiency and quality throughout the year.

[0021] The side wall spray system can adjust the nozzle spacing and extension distance through a folding structure, and the auxiliary temperature control mechanism can move longitudinally along the beam. It can be adapted to the maintenance of precast box girders, T-beams and other components with different spans and cross-sectional sizes without requiring major modifications to the equipment for the beam type. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0024] Figure 2 This is a schematic diagram of the connection structure of the maintenance shed of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0025] Figure 3 This is a schematic diagram of the top wall spraying assembly structure of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the side wall spraying group and the heat dissipation component of a solar prefabricated bridge maintenance equipment according to the present invention;

[0027] Figure 5 This is a schematic diagram of the moving component structure of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0028] Figure 6 This is a schematic diagram of the auxiliary temperature regulation mechanism of a solar prefabricated bridge maintenance device according to the present invention;

[0029] Figure 7 This is a schematic diagram of the internal threaded sleeve structure of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0030] Figure 8 This is a schematic diagram of the conveying mechanism structure of a solar-powered prefabricated bridge maintenance equipment according to the present invention;

[0031] Figure 9 This is a schematic diagram of the conveyor platform structure of a solar-powered prefabricated bridge maintenance device according to the present invention;

[0032] Figure 10 This is a schematic diagram of the second moving plate structure of a solar-powered prefabricated bridge maintenance device according to the present invention.

[0033] In the diagram: 1. Curing shed body; 101. Outer light-transmitting and heat-insulating layer; 102. Medium-temperature air-conditioning layer; 103. Inner light-transmitting and heat-collecting layer; 2. Vacuum solar collector assembly; 3. Water tank; 4. Water-heated radiator; 5. Connecting pipe; 6. Top wall spray assembly; 601. Main delivery pipe; 602. Bottom pipe; 603. Top wall water storage tank; 604. Spray branch pipe; 605. Support plate; 606. Inverted U-shaped platform; 607. Support plate; 608. Motor II; 609. Main pulley; 610. Pad; 611. Secondary pulley; 612. Belt; 613. Atomizing nozzle II; 614. Support II; 615. Limiting wheel; 616. Fixing block; 617. Pipe joint one; 618. Hose; 619. Pipe joint two; 7. Side wall spray assembly; 701. Support three; 702. Side water storage tank; 703. Connecting channel two; 704. Corrugated pipe; 705. Connecting pipe one; 706. Atomizing nozzle one; 707. Horizontal plate; 708. Upper fixing plate; 709. Lower fixing plate one; 710. L-shaped seat; 711. Lower fixing plate two; 712. Vertical plate; 713. Guide rod; 714. First moving plate; 715. Straight groove; 716. Lower protrusion; 717. Miniature actuator; 718. Lead screw two; 719. Internal thread block; 7 20. Drive arm one; 721. Drive arm two; 722. Limiting rod; 8. Water delivery pipe three; 9. Water delivery pipe one; 10. Water delivery pipe two; 11. Heat dissipation assembly; 1101. Motor one; 1102. Lead screw one; 1103. Stop block; 1104. Auxiliary temperature control mechanism; 1106. Internal threaded sleeve; 1107. Support plate; 1108. Drive rod; 1109. Connecting rod; 1110. Control panel; 1111. Heating element; 1112. Air outlet; 1113. Exhaust channel; 1114. Mounting slot; 1115. Rotary disk; 1116. Fan blade; 12. Beam frame; 13. Support platform; 1 4. Slotting; 15. Conveying mechanism; 1501. Conveying plate; 1502. Conveying table; 1503. Conveying trough; 1504. Fixed toothed plate one; 1505. L-shaped plate; 1506. Trapezoidal support plate; 1507. Limiting roller; 1508. Second moving plate; 1509. Side toothed plate; 1510. Gear one; 1511. I-shaped track plate; 1512. Center groove; 1513. Mounting plate; 1514. Gear two; 1515. Fixed toothed plate two; 1516. Side sliding plate; 1517. Cylinder; 1518. Air rod; 1519. Telescopic column one; 1520. Telescopic column two; 16. Placement plate. Detailed Implementation

[0034] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-10 This invention provides a technical solution for solar-powered precast bridge maintenance equipment, including a maintenance shed 1. The exterior of the maintenance shed 1 is equipped with a solar thermal collector and storage unit, a conveying mechanism 15, and a controller (HAD-SC200 universal controller). The interior of the maintenance shed 1 is equipped with a temperature and humidity control unit. The maintenance shed 1 is made of double-layer heat-insulating and light-transmitting film or board, and has a support platform 13 at the bottom with a slot 14 in the middle. The solar thermal collector and storage unit includes a vacuum solar collector group 2, a water tank 3, a variable frequency circulating pump group, and several water-heated radiators 4. The vacuum solar collector group 2 is installed on the top of the maintenance shed 1 via mounting components. The vacuum solar collector group 2 is connected to the variable frequency circulating pump group in the water tank 3 via a connecting pipe 5. The pump unit is connected; the temperature and humidity control unit includes a spray assembly, a heat dissipation assembly 11, and a temperature and humidity sensor. The temperature and humidity sensor is fixedly installed on the inner wall of the maintenance shed 1; the spray assembly consists of a top wall spray assembly 6 and a side wall spray assembly 7. The top wall spray assembly 6 is connected to the variable frequency circulating pump unit through a water delivery pipe 3 8, and the side wall spray assembly 7 is connected to the variable frequency circulating pump unit through a water delivery pipe 1 9 and a water delivery pipe 2 10; the heat dissipation assembly 11 is installed below the side wall spray assembly 7; the conveying mechanism 15 is installed on one side of the opening end of the support platform 13, and a placement plate 16 is provided at the bottom of the beam. The bottom of the placement plate 16 is mechanically connected to the conveying plate 1501 of the conveying mechanism 15; the controller is electrically connected to the solar thermal collection and storage unit, the temperature and humidity control unit, and the conveying mechanism 15 respectively.

[0036] See Figure 2The curing shed 1 is a closed, elongated shed, consisting of an outer light-transmitting and heat-insulating layer 101, a central air-conditioning and temperature-controlled layer 102, and an inner light-transmitting and heat-collecting layer 103, arranged from the outside to the inside. Sealed end doors that can be opened and closed are provided at both ends of the shed. The water-heating radiators 4 are located on both sides inside the curing shed 1, and their inlets are connected to a variable frequency circulating pump set installed in the water tank 3 via a circulation pipeline. The curing shed 1, made of a double-layered heat-insulating and light-transmitting film, forms a three-layered structure. The structure achieves heat collection and insulation through transmission, absorption, and blocking; specifically: First, greenhouse effect heat collection: short-wave solar radiation can penetrate the outer and inner membrane materials, and is absorbed by the beams, air, and ground inside the greenhouse, converting into long-wave heat energy; the outer light-transmitting insulation layer 101 is supplemented with long-wave blocking agents, which can block the leakage of long-wave radiation and seal the heat energy inside the greenhouse; Second, hollow layer insulation: the hollow air-conditioning layer 102 is a closed still air layer, and the thermal conductivity of still air is much lower. The membrane material itself can significantly block heat conduction between the inside and outside of the greenhouse; when there is no solar energy input at night, the cooling rate inside the greenhouse is greatly reduced, reducing the energy consumption of auxiliary heating at night; thirdly, the inner layer prevents condensation: the inner light-transmitting heat-collecting layer 103 has both heat absorption and water-repellent properties. On the one hand, it absorbs transmitted light energy to increase the greenhouse temperature, and on the other hand, it prevents water mist inside the greenhouse from condensing into droplets on the membrane surface, avoiding water droplets from causing water marks and local temperature differences on the beam surface, and ensuring uniform curing; among them, the outer film of the double-layer heat-insulating and light-transmitting membrane is a PO (polyolefin) composite weather-resistant membrane, which is prepared by multi-layer co-extrusion process. It belongs to the high-performance polyolefin light-transmitting and heat-insulating membrane, which uses metallocene linear low-density polyethylene (mLLDPE), low-density polyethylene (LDPE), vinyl acetate (EVA) and other basic raw materials. Through the layered design of the outer weather-resistant layer, the middle heat-insulating layer and the inner functional layer, it simultaneously achieves multiple functions such as high light transmittance, strong heat insulation, long weather resistance and anti-condensation.

[0037] The inner film is a nano-infrared blocking EVA film. Its performance is as follows: ITO (nano-indium tin oxide), ATO (antimony tin oxide), or far-infrared ceramic powder are added to the PE (polyethylene) and EVA (ethylene-vinyl acetate copolymer) substrates. The solar transmittance is maintained at over 85%, and the far-infrared blocking rate can reach 80%~85%. Therefore, the heat collection and heat preservation effect is greatly improved. Its characteristics are: the heat collection efficiency is more than 20% higher than that of ordinary EVA film, and the nighttime cooling rate can be reduced by 40%. It belongs to the high-end of polyolefins. It is suitable for areas with low winter temperatures and large day-night temperature differences.

[0038] See Figure 3The maintenance shed 1 has beams 12 on both sides of its top, and a top wall spray system 6 is installed on the beams 12. The top wall spray system 6 includes a main delivery pipe 601, which is installed on the top of the maintenance shed 1 via a bracket. Several bottom pipes 602 are connected to the bottom of the main delivery pipe 601. The bottom pipes 602 penetrate the maintenance shed 1 and are connected at their bottom to a top wall water storage tank 603 installed on the top wall inside the maintenance shed 1. Several spray branch pipes 604 are connected to the bottom of the top wall water storage tank 603. The spray branch pipes 604 are connected to the beams 12. The spray drive unit is connected to the installed unit; the spray drive unit includes a support plate 605, an inverted U-shaped platform 606 on one side of the top of the support plate 605, support plates 607 on both sides of the top of the inverted U-shaped platform 606 and at both ends of the other side of the top of the support plate 605, the top of the support plates 607 is fixed to the bottom of the beam frame 12, and a second motor 608 is installed at the bottom of the support plate 605 below the inverted U-shaped platform 606, the output end of the second motor 608 is connected to an output shaft, and the output shaft passes through the support plate 605, the inverted U-shaped platform 606 and the top of the inverted U-shaped platform 606. The main pulley 609 is connected to the bearing plate 605. Several pads 610 are located at the top center of the bearing plate 605. A secondary pulley 611 is located on top of each pad 610. The secondary pulley 611 is connected to the main pulley 609 via a belt 612. A central shaft is inserted through the middle of the secondary pulley 611, passing through the pads 610 and the bearing plate 605. An atomizing nozzle 613 is located at the bottom of the central shaft. A bracket 614 is located between the sides of adjacent pads 610. Several limiting wheels 615 are located on the upper part of the bracket 614. 615 adopts an elastic tensioning structure, which can always maintain the stable tension of belt 612, avoid slippage and loss of rotation, and ensure constant nozzle speed; several fixing blocks 616 are evenly arranged on one side of the bearing plate 605, and a pipe joint 617 is inserted in the middle of the fixing block 616. The bottom of the spray branch pipe 604 is connected to the pipe joint 617. A hose 618 is connected to the other side of the pipe joint 617, and a pipe joint 619 is connected to the other side of the hose 618. The other side of the pipe joint 619 is connected to the side of the atomizing nozzle 613.

[0039] See Figure 4-5The side wall spraying assembly 7 includes a set of support brackets 701, which are fixedly installed at both ends of the inner sides of the maintenance shed 1. A side water storage tank 702 is located at the top of the support bracket 701 near the inner wall of the maintenance shed 1. Water delivery pipes 9 and 10 are respectively connected to the top of the adjacent side water storage tank 702. Several connecting channels 703 are located at the top of the side water storage tank 702. A corrugated pipe 704 is connected to the other side of each connecting channel 703, and a connecting pipe 705 is connected to the other side of each corrugated pipe 704. On the other side is atomizing nozzle 706; a horizontal plate 707 is transversely installed between the upper and lower parts of the corresponding sides of the brackets 701 on both sides. On one side of bracket 701, an upper fixing plate 708 and a lower fixing plate 709 are respectively installed on the upper and lower parts of the inner side. On the other side of bracket 701, an L-shaped seat 710 and a lower fixing plate 711 are respectively installed on the upper and lower parts of the inner side. The heat dissipation assembly 11 is transversely fixed between the lower fixing plate 709 and the lower fixing plate 711. A vertical plate 712 is installed on the side of the L-shaped seat 710 away from bracket 701. Guide rods 713 are transversely arranged between plate 712 and upper fixed plate 708 and lower fixed plate 709. A movable component is provided on the guide rod 713. A connecting pipe 705 passes through the upper part of the vertical plate 712 and the movable component. The movable component includes several first moving plates 714 sleeved on the guide rods 713. Both the first moving plates 714 and the vertical plate 712 have straight grooves 715. A lower protrusion 716 is provided on the lower part of the vertical plate 712 near the support 701. A micro-actuator 717 is provided on the side of the lower protrusion 716 away from the vertical plate 712. The output end of the micro driver 717 is connected to a lead screw 718. The top of the lead screw 718 is movably connected to the L-shaped seat 710. The lead screw 718 is fitted with a threaded internal thread block 719. The internal thread block 719 has a folding structure on the side near the vertical plate 712. The folding structure consists of several intersecting drive arms 720 and drive arms 721. The lower intersecting end is provided with a limiting rod 722 that slides with the straight groove 715. The upper intersecting end is movably connected to the upper side of the corresponding vertical plate 712 and the first moving plate 714.

[0040] The folding structure employs a parallelogram linkage mechanism, with all cross arms of equal length and evenly distributed hinge points. When a single set of lead screws drives the internal threaded blocks to rise and fall, all first moving plates move synchronously along the guide rod, and the distance between adjacent first moving plates remains equal. Only one power source is needed to achieve synchronous adjustment of all nozzles, eliminating the need for individual calibration. In the folded state, the nozzles are close to the canopy wall, maximizing the space for beam hoisting and preventing equipment collisions during hoisting. In the unfolded state, the nozzles are close to the side of the beam, controlling the spray distance within the optimal spray range and ensuring that the water mist adheres evenly to the surface of the beam web, preventing premature dissipation. The corrugated pipe is made of weather-resistant rubber and plastic material, with a ring-shaped pleated structure on the pipe wall to withstand axial expansion and contraction. Both ends are rigidly connected with sealed joints, ensuring no leakage points throughout and making it suitable for high-humidity, frequently adjusted maintenance conditions.

[0041] See Figure 4 , 6 7. The heat dissipation assembly 11 includes a motor 1101, a lead screw 1102, several stops 1103, and an auxiliary temperature control mechanism 1104. The lead screw 1102 passes through the lower part of the lower fixed plate 709 and the middle part of the lower fixed plate 711. The input end of the lead screw 1102 is connected to the motor 1101. The motor 1101 is fixedly installed on the lower outer side of the lower fixed plate 709. The auxiliary temperature control mechanism 1104 is sleeved on the lead screw 1102. A set of stops 1103 is provided between adjacent auxiliary temperature control mechanisms 1104. The auxiliary temperature control mechanism 1104 includes an internal threaded sleeve 1106 that is threaded to the lead screw 1102. Several sets of support plates 1107 are provided on the outer wall of the internal threaded sleeve 1106. A drive rod 1108 is provided between the support plates 1107. A connecting rod 1109 is provided on the side away from the support plate 1107. An eccentric control plate 1110 is provided on the side of the connecting rod 1109 away from the drive rod 1108. A heating element 1111 and a temperature detector are provided in the control plate 1110. Several air outlets 1112 are evenly provided around the side of the control plate 1110 away from the connecting rod 1109. An exhaust channel 1113 is connected to the air outlets 1112. An installation groove 1114 is provided in the middle of the side of the control plate 1110 away from the connecting rod 1109. A rotating disk 1115 is provided in the installation groove 1114. Several fan blades 1116 are provided on the rotating disk 1115. The inner wall of the internal threaded sleeve 1106 is provided with a snap-fit ​​groove. The surface of the lead screw 1102 is provided with a limiting protrusion that matches the snap-fit ​​groove. A waterproof and breathable membrane is provided at the outlet end of the exhaust channel 1113.

[0042] The control panel 1110 is eccentrically mounted on the connecting rod 1109. When the drive rod 1108 rotates at low speed, the control panel 1110 performs a circular translation rather than a rotation, allowing the airflow direction to continuously oscillate within a range of ±30°. This avoids uneven temperature caused by a fixed airflow blowing directly onto the beam. The horizontal airflow generated by the rotating fan blades 1116 breaks the natural temperature stratification inside the shed, forcing the mixing of hot and cold air and controlling the temperature difference between the top and bottom of the shed within a certain range. This solves the problem of overheating at the top and insufficient temperature at the bottom in traditional steam curing, ensuring uniform strength of the beam. The limiting protrusion and the locking groove adopt a spline-type fit, which allows the internal threaded sleeve 1106 to slide axially along the lead screw 1102 while completely restricting circumferential rotation, preventing deflection and jamming during mechanism movement and ensuring stability during long-distance reciprocating operation.

[0043] See Figure 1 , 8 -10, the conveying mechanism 15 includes a conveying platform 1502, a conveying groove 1503 at the top center of the conveying platform 1502, a fixed toothed plate 1504 at the center of the bottom wall of the conveying groove 1503, L-shaped plates 1505 symmetrically arranged on both sides of the bottom wall of the conveying groove 1503, several trapezoidal support plates 1506 on the L-shaped plates 1505, several limiting rollers 1507 above the trapezoidal support plates 1506 located on the top side of the L-shaped plates 1505, a second moving plate 1508 transversely arranged between the limiting rollers 1507 and the L-shaped plates 1505, a side toothed plate 1509 on one side of the bottom of the second moving plate 1508, a meshing gear 1510 on the side of the side toothed plate 1509, the bottom of the gear 1510 being electrically connected to a motor installed inside the conveying platform 1502 via a gear shaft; I-shaped track plates 1511 are provided on both sides of the top of the second moving plate 1508, and in the middle The conveyor plate 1501 has a central groove 1512, and mounting plates 1513 are provided on both sides of the central groove 1512. A connecting shaft is provided transversely between the mounting plates 1513. A gear 1514 that meshes with a fixed toothed plate 1504 is sleeved in the middle of the connecting shaft. A fixed toothed plate 1515 that meshes with the gear 1514 is provided above the gear 1514. The top of the fixed toothed plate 1515 is fixed to the center of the bottom of the conveyor plate 1501. Side slide plates 1516 that slide with the I-shaped track plate 1511 are symmetrically provided on both sides of the bottom of the conveyor plate 1501. A cylinder 1517 is provided at the center of the top of the conveyor plate 1501. A telescopic rod 1518 is provided in the cylinder 1517. Telescopic columns 1519 are provided on both sides of the top of the conveyor plate 1501. Telescopic columns 1520 that telescopically cooperate with the telescopic column 1519 are provided in the telescopic column 1519. A magnetic plate is provided on the top of the telescopic column 1520. An armature is provided at the bottom of the placement plate 16.

[0044] The circuits, electronic components, modules and controllers involved, as well as the heat dissipation holes and maintenance doors of the equipment, are all existing technologies that can be fully implemented by those skilled in the art, and there is no need to elaborate. The content protected by this application does not involve improvements to the software and methods, or to heat dissipation and maintenance.

[0045] In use, the precast beam is placed stably on the placement plate 16, which is pre-placed on the conveyor plate 1501. The bottom armature of the placement plate 16 attracts the magnetic plate at the top of the telescopic column 1520. The motor 3 is started, which drives the gear 1510 to rotate. The gear 1510 drives the side tooth plate 1509, which in turn drives the I-shaped track plate 1511 to slide back and forth in the space between the limiting roller 1507 and the trapezoidal support plate 1506, thus moving the precast beam toward the inlet end of the curing shed 1. The gear 2 1514 is fixed to the tooth plate 1504. Rolling is achieved in the top tooth groove, which synchronously drives the fixed tooth plate 1515 to slide forward. The side slide plate 1516 slides in the groove of the I-shaped track plate 1511, thus pushing the conveyor plate 1501 into the slot 14. After the precast beam is completely pushed into the curing shed 1, the cylinder 1517 is activated, which drives the air rod 1518 downward. The extension and retraction of the air rod 1518 causes the placement plate 16 to move downward, so that the conveyor plate 1501 moves away from the placement plate 16. The placement plate 16 is mounted on the support platform 13. Then the drive gear 1510 rotates in the opposite direction, which drives the conveyor plate 1501 to reset.

[0046] After the precast beams are transported to the center position inside the shed, the sealing and reliability of all pipe and electrical connections are checked, and the water tank 3 is confirmed to have sufficient water. The vacuum solar collector group 2 absorbs short-wave solar radiation, heats the internal heat-conducting medium, and then transports it to the water tank 3 through the connecting pipe 5. There, heat is exchanged with the water in the tank 3, storing the heat energy in the water. The variable frequency circulating pump group includes two independent branches: a heating circulating pump and a spray water supply pump. These water circuits are independent and do not interfere with each other. When heating is needed, the hot water in the water tank 3 is transported to the water-heated radiators 4 on both sides of the shed, raising the ambient temperature through radiation. The cooled water then flows back to the water tank 3 for reheating, forming a closed loop. When spraying is needed, constant-temperature hot water is transported to the spray system to prevent thermal stress cracking on the beam surface caused by cold water spraying, ensuring stable concrete hydration. When continuous rain or insufficient solar energy causes the water temperature in the water tank 3 to drop below the set value, the controller can activate the auxiliary electric heating module built into the water tank 3 to supplement heat, ensuring stable curing temperature under extreme weather conditions.

[0047] When the humidity inside the shed is lower than the set threshold, the controller starts the sprinkler water supply pump. Warm water enters the main delivery pipe 601 through the third delivery pipe 8, flows into the top wall water storage tank 603 for pressure stabilization through the bottom pipe 602, and then is delivered to the atomizing nozzle 613 through the sprinkler branch pipe 604, pipe joint 617, hose 618, and pipe joint 619 to atomize and spray out, humidifying and curing the top surface of the beam. At the same time, the second motor 608 starts, driving the main pulley 609 to rotate, which drives the secondary pulley 611 to rotate through the belt 612, and then drives the atomizing nozzle 613 to rotate at a uniform speed through the central shaft, expanding the spray coverage of a single nozzle and achieving uniform spraying of the top surface without dead angles; the limiting wheel 615 on the second bracket 614 is used to constrain the belt tension, prevent the belt from slipping and loosening, and ensure transmission stability.

[0048] Meanwhile, warm water is delivered to the side water storage tanks 702 on both sides via water delivery pipe 19 and water delivery pipe 210 for pressure stabilization, and then delivered to the atomizing nozzle 706 through connecting channel 2 703, corrugated pipe 704 and connecting pipe 1 705 to humidify the facades on both sides of the beam. When the width of the precast beam cross-section changes, the lateral position of all atomizing nozzles 706 can be adjusted synchronously by moving components. Specifically, the micro actuator 717 drives the lead screw 718 to rotate, which in turn drives the internal thread block 719 to rise and fall along the lead screw 718, thereby driving the scissor-type folding structure composed of drive arm 720 and drive arm 721 to unfold or retract. The folding structure slides in the straight groove 715 through the limiting rod 722, which drives multiple sets of first moving plates 714 to move synchronously and equidistantly along the guide rod 713, so as to realize the synchronous adjustment of the spacing and extension of all atomizing nozzles 706, and adapt to the optimal spraying distance for beams of different widths. The corrugated pipe 704 adapts to the movement of the nozzles and extends and retracts, ensuring that the water circuit is sealed and leak-proof throughout the process.

[0049] Meanwhile, the heat dissipation component 11 has dual functions of heating assistance and cooling dissipation, and its operation steps are as follows:

[0050] Longitudinal movement drive: Motor 1101 drives lead screw 1102 to rotate. Through the threaded engagement of internal threaded sleeve 1106 and lead screw 1102, the auxiliary temperature control mechanism 1104 is driven to reciprocate longitudinally along the beam. Stop block 1103 is used to limit the movement stroke and prevent the mechanism from colliding with the end structure. The limiting protrusion on the surface of lead screw 1102 engages with the snap-fit ​​groove on the inner wall of internal threaded sleeve 1106 to limit the circumferential rotation of internal threaded sleeve and ensure smooth movement without deflection.

[0051] The air supply structure principle: The drive rod 1108 between the support plates 1107 can rotate at low speed around its own axis, driving the eccentrically set control plate 1110 to swing in a circle, expanding the air supply coverage and avoiding uneven temperature caused by local direct blowing; the rotating disk 1115 in the middle of the control plate 1110 drives the fan blade 1116 to rotate, forming a directional airflow. The airflow is blown out evenly through the peripheral air outlet 1112 and the exhaust channel 1113. The waterproof and breathable membrane at the outlet of the exhaust channel 1113 can prevent water mist from entering the equipment and protect the electrical components from moisture damage.

[0052] Heating mode: When the local temperature inside the greenhouse is lower than the set value, the heating element 1111 in the control panel 1110 is activated, and the fan blades 1116 blow out the heated air evenly to supplement the local area and drive the air circulation inside the greenhouse to eliminate temperature stratification.

[0053] Cooling mode: When the temperature inside the shed exceeds the set upper limit, the heating element 1111 stops working, and the fan blades 1116 rotate at high speed to drive forced convection of air inside the shed. This, combined with the ventilation openings of the shed, exhausts hot air, achieving rapid and uniform cooling and preventing the concrete from cracking due to excessive temperature.

[0054] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A solar-powered prefabricated bridge maintenance device, characterized in that, It includes a maintenance shed (1), with a solar thermal collection and storage unit, a conveying mechanism (15) and a controller on the outside of the maintenance shed (1), and a temperature and humidity control unit inside the maintenance shed (1); The maintenance shed (1) is made of double-layer heat-insulating and light-transmitting film or board, and a support platform (13) is provided at the bottom. The support platform (13) has a groove (14) in the middle. The solar thermal collector and storage unit includes a vacuum solar collector group (2), a water tank (3), a variable frequency circulating pump group and several water heating radiators (4). The vacuum solar collector group (2) is installed on the top of the maintenance shed (1) through the mounting parts. The vacuum solar collector group (2) is connected to the variable frequency circulating pump group installed in the water tank (3) through the connecting pipe (5). The temperature and humidity control unit includes a spray assembly, a heat dissipation assembly (11), and a temperature and humidity sensor. The temperature and humidity sensor is fixedly installed on the inner wall of the maintenance shed (1). The spray assembly consists of a top wall spray group (6) and a side wall spray group (7). The top wall spray group (6) is connected to the variable frequency circulating pump group through a third water delivery pipe (8). The side wall spray group (7) is connected to the variable frequency circulating pump group through a first water delivery pipe (9) and a second water delivery pipe (10). The heat dissipation assembly (11) is installed below the side wall spray group (7). The conveying mechanism (15) is installed on one side of the opening end of the support platform (13), and a placement plate (16) is provided at the bottom of the beam. The bottom of the placement plate (16) is mechanically connected to the conveying plate (1501) of the conveying mechanism (15). The controller is electrically connected to the solar thermal collector and storage unit, the temperature and humidity control unit and the conveying mechanism (15).

2. The solar-powered prefabricated bridge maintenance equipment according to claim 1, characterized in that, The maintenance shed (1) is a closed long strip shed, and from the outside to the inside are an outer light-transmitting heat insulation layer (101), a middle air-conditioning heat insulation layer (102) and an inner light-transmitting heat collection layer (103). The two ends of the shed are equipped with openable and closable sealed end doors.

3. The solar-powered prefabricated bridge maintenance equipment according to claim 1, characterized in that, The water-heated radiator (4) is located on both sides inside the maintenance shed (1), and the water inlet is connected to the variable frequency circulating pump set installed in the water tank (3) through the circulation pipeline.

4. The solar-powered prefabricated bridge maintenance equipment according to claim 1, characterized in that, The maintenance shed (1) has beams (12) on both sides of the top, and the top wall spraying group (6) is installed on the beams (12). The top wall spraying group (6) includes a main conveying pipe (601). The main conveying pipe (601) is installed on the top of the maintenance shed (1) through a bracket. The bottom of the main conveying pipe (601) is connected to several bottom pipes (602). The bottom pipes (602) penetrate the maintenance shed (1) and are connected to the top wall water storage tank (603) installed on the top wall inside the maintenance shed (1). The bottom of the top wall water storage tank (603) is connected to several spraying branch pipes (604). The spraying branch pipes (604) are connected to the spraying drive unit installed on the beams (12).

5. The solar-powered prefabricated bridge maintenance equipment according to claim 4, characterized in that, The spray drive unit includes a support plate (605), an inverted U-shaped platform (606) on one side of the top of the support plate (605), and support plates (607) on both sides of the top of the inverted U-shaped platform (606) and at both ends of the top of the support plate (605). The top of the support plates (607) is fixed to the bottom of the beam frame (12). A second motor (608) is located below the inverted U-shaped platform (606) at the bottom of the support plate (605). An output shaft is connected to the output end of the second motor (608). The output shaft passes through the support plate (605), the inverted U-shaped platform (606), and is connected to the main pulley (609) on the top of the inverted U-shaped platform (606). Several pads (610) are located at the center of the top of the support plate (605). A secondary pulley (611) is located on the top of the pads (610). The secondary pulley (611) is connected to the belt (612) via the belt. The secondary pulley (611) is connected to the main pulley (609). A central shaft is inserted in the middle of the secondary pulley (611). The central shaft passes through the pad (610) and the bearing plate (605). A second atomizing nozzle (613) is provided at the bottom of the central shaft. A second bracket (614) is provided between the sides of adjacent pads (610). Several limit wheels (615) are provided on the upper part of the second bracket (614). Several fixing blocks (616) are evenly provided on one side of the bearing plate (605). A first pipe joint (617) is inserted in the middle of the fixing block (616). The bottom of the spray branch pipe (604) is connected to the first pipe joint (617). A hose (618) is connected to the other side of the first pipe joint (617). A second pipe joint (619) is connected to the other side of the hose (618). The other side of the second pipe joint (619) is connected to the side of the second atomizing nozzle (613).

6. The solar-powered prefabricated bridge maintenance equipment according to claim 1, characterized in that, The side wall spray assembly (7) includes a set of brackets three (701). The brackets three (701) are fixedly installed at both ends of the inner sides of the maintenance shed (1). The brackets three (701) are provided with a side water storage tank (702) on the top of the side of the inner wall of the maintenance shed (1). Water delivery pipe one (9) and water delivery pipe two (10) are respectively connected to the top of the adjacent side water storage tank (702). The top of the side water storage tank (702) is provided with several connecting channels two (703). Corrugated pipes (704) are connected to the other side of the connecting channels two (703). Connecting pipe one (705) is connected to the other side of the corrugated pipe (704). Atomizing nozzle one (706) is connected to the other side of the connecting pipe one (705). The brackets three (701) on both sides are transversely connected between the upper and lower parts of the corresponding sides. A horizontal plate (707) is provided. On the upper and lower parts of the inner side of one side bracket three (701), an upper fixing plate (708) and a lower fixing plate one (709) are respectively provided. On the upper and lower parts of the inner side of the other side bracket three (701), an L-shaped seat (710) and a lower fixing plate two (711) are respectively provided. A heat dissipation component (11) is fixed horizontally between the lower fixing plate one (709) and the lower fixing plate two (711). On the side of the L-shaped seat (710) away from the bracket three (701), a vertical plate (712) is provided. A guide rod (713) is provided horizontally between the vertical plate (712) and the upper fixing plate (708) and the lower fixing plate one (709). A moving part is provided on the guide rod (713). A connecting pipe one (705) passes through the vertical plate (712) and the upper part of the moving part.

7. A solar-powered prefabricated bridge maintenance device according to claim 6, characterized in that, The moving component includes several first sliding plates (714) sleeved on the guide rod (713). Both the first sliding plates (714) and the upright plate (712) are provided with straight grooves (715). The lower part of the upright plate (712) near the support three (701) is provided with a lower protrusion (716). The side of the lower protrusion (716) away from the upright plate (712) is provided with a micro driver (717). The output end of the micro driver (717) is connected to a lead screw two (718). The top of the lead screw two (718) is movably connected to... On the L-shaped seat (710), a threaded internal thread block (719) with threaded engagement is fitted on the second lead screw (718). The internal thread block (719) has a folding structure on the side near the vertical plate (712). The folding structure consists of several intersecting drive arms one (720) and drive arms two (721). The lower intersecting end is provided with a limiting rod (722) that slides with the straight groove (715). The upper intersecting end is movably connected to the upper side of the corresponding vertical plate (712) and the first moving plate (714).

8. A solar-powered prefabricated bridge maintenance device according to claim 6, characterized in that, The heat dissipation assembly (11) includes a motor (1101), a lead screw (1102), several stops (1103), and an auxiliary temperature control mechanism (1104). The lead screw (1102) passes through the lower part of the lower fixed plate (709) and the middle part of the lower fixed plate (711). The input end of the lead screw (1102) is connected to the motor (1101). The motor (1101) is fixedly installed on the lower part of the outer side of the lower fixed plate (709). The auxiliary temperature control mechanism (1104) is sleeved on the lead screw (1102). A set of stops (1103) is provided between each adjacent auxiliary temperature control mechanism (1104).

9. A solar-powered prefabricated bridge maintenance device according to claim 8, characterized in that, The auxiliary temperature control mechanism (1104) includes an internal threaded sleeve (1106) that is threaded to the lead screw (1102). The outer wall of the internal threaded sleeve (1106) is provided with several sets of support plates (1107). A drive rod (1108) is provided between the support plates (1107). A connecting rod (1109) is provided on the side of the drive rod (1108) away from the support plate (1107). An eccentric control plate (1110) is provided on the side of the connecting rod (1109) away from the drive rod (1108). The control plate (1110) contains a heating element (1111) and a temperature detector. The control plate (1110) is located on the side away from the drive rod (1108). A number of air outlets (1112) are evenly arranged around the side away from the connecting rod (1109). An exhaust channel (1113) is connected to the air outlet (1112). A waterproof and breathable membrane is provided at the outlet end of the exhaust channel (1113). An installation groove (1114) is provided in the middle of the side of the control plate (1110) away from the connecting rod (1109). A rotating disk (1115) is provided in the installation groove (1114). A number of fan blades (1116) are provided on the rotating disk (1115). A snap-fit ​​groove is provided on the inner wall of the internal thread sleeve (1106). A limiting protrusion that matches the snap-fit ​​groove is provided on the surface of the screw (1102).

10. A solar-powered prefabricated bridge maintenance device according to claim 1, characterized in that, The conveying mechanism (15) includes a conveying platform (1502), a conveying trough (1503) at the center of the top of the conveying platform (1502), a fixed toothed plate (1504) at the center of the bottom wall of the conveying trough (1503), L-shaped plates (1505) symmetrically arranged on both sides of the bottom wall of the conveying trough (1503), a number of trapezoidal support plates (1506) arranged on the L-shaped plates (1505), and a number of limiting rollers arranged above the trapezoidal support plates (1506) on the top of the side of the L-shaped plates (1505). (1507), a second moving plate (1508) is provided laterally between the limiting roller (1507) and the L-shaped plate (1505). A side toothed plate (1509) is provided on one side of the bottom of the second moving plate (1508). A meshing gear (1510) is provided on the side of the side toothed plate (1509). The bottom of the gear (1510) is connected to the motor (three electrical connections) provided inside the conveyor table (1502) through the gear shaft. I-shaped track plates (1511) are provided on both sides of the top of the second moving plate (1508), and the middle part is... A central groove (1512) is provided, and mounting plates (1513) are provided on both sides of the central groove (1512). A connecting shaft is provided transversely between the mounting plates (1513). A gear two (1514) that meshes with a fixed gear plate one (1504) is sleeved in the middle of the connecting shaft. A fixed gear plate two (1515) that meshes with the gear two (1514) is provided above the gear two (1514). The top of the fixed gear plate two (1515) is fixed at the center of the bottom of the conveyor plate (1501). Symmetrical mounting plates are provided on both sides of the bottom of the conveyor plate (1501). Side slide plate (1516) that slides in cooperation with I-shaped track plate (1511); cylinder (1517) is provided at the top center of conveyor plate (1501), and air rod (1518) that telescopically cooperates is provided inside cylinder (1517); telescopic column one (1519) is provided on both sides of the top of conveyor plate (1501), telescopic column two (1520) that telescopically cooperates is provided inside telescopic column one (1519), magnetic plate is provided on the top of telescopic column two (1520), and armature is provided at the bottom of placement plate (16).

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