Air energy steam curing system for concrete precast components

Abstract

The present application belongs to the technical field of concrete prefabricated product curing, in particular to an air energy steam curing system for concrete prefabricated components, comprising a plurality of steam curing houses, air energy heat pump units and air pipe assemblies arranged near the steam curing houses, and further comprising: a film covering shed, the film covering shed comprising a plurality of telescopic frames and elastic films wrapped outside the plurality of telescopic frames; a top lifting mechanism placed at the top of the steam curing house for driving the film covering shed to expand / contract along the height space of the steam curing house; a bottom pulling mechanism placed at the bottom of the steam curing house for driving the film covering shed to expand / contract along the width space of the steam curing house; a pulling mechanism for driving the film covering shed to expand / contract along the length direction of the steam curing house; wherein the air pipe assembly comprises a plurality of atomizing pipes arranged on the telescopic frames and ventilation pipes connected to the film covering shed; the film covering shed can perform film covering type steam curing treatment on prefabricated components of different sizes in the steam curing house, and can also reduce unnecessary energy waste.

Description

Technical Field

[0001] This invention belongs to the field of precast concrete curing technology, and in particular relates to an air-source steam curing system for precast concrete components. Background Technology

[0002] Precast concrete components require steam curing, the core of which is to accelerate the cement hydration reaction and ensure the stability of component quality by artificially controlling the temperature and humidity environment, while also meeting the core requirements of "industrialized mass production and rapid demolding and turnover" of precast components.

[0003] Chinese patent application number CN202110376164.4, entitled "Curing Equipment for Precast Concrete Components," describes a curing device comprising a curing hood, a drive mechanism, a steam generator, a detection component, and a remote processor. The curing hood has a door on one side and a moving mechanism installed at its bottom. The drive mechanism is connected to the moving mechanism. Both the steam generator and the detection component are installed inside the curing hood. The steam generator is equipped with a control switch, and both the control switch and the detection component are connected to the remote processor. The detection component is used to detect steam temperature and humidity. The remote processor can receive and display the steam temperature and humidity and can send temperature and humidity adjustment commands to the control switch. The control switch is used to adjust the steam temperature and humidity generated by the steam generator.

[0004] Although existing curing equipment can cure precast concrete components, it has the following shortcomings:

[0005] First, the curing cover can only extend or retract along its length within the curing chamber, and cannot retract in three dimensions within the curing chamber. This makes it difficult to perform shrinkage or expansion insulation and moisture curing treatment on precast concrete components of different sizes, which can easily lead to unnecessary energy waste.

[0006] Secondly, although the curing hood of the curing equipment adopts a structure that extends and retracts along its length, it does not explain or provide the sealing performance of the connection between the moving mechanism and the drive mechanism of the curing hood and the ground of the curing room or curing kiln. This can easily lead to a large amount of steam and temperature loss inside the curing hood, which will not only affect the quality and efficiency of curing precast concrete components, but also cause unnecessary energy loss. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] This invention relates to an air-source heat pump curing system for precast concrete components, comprising several sets of curing chambers, air-source heat pump units and duct assemblies arranged near the curing chambers, and further comprising: a film-covered shed, placed inside the curing chambers in a retractable and extendable manner, the film-covered shed comprising several telescopic frames arranged along the length of the curing chamber and an elastic membrane covering the outside of the telescopic frames; a top lifting mechanism, located at the top of the curing chamber, for driving the film-covered shed to expand / contract along the height of the curing chamber; a bottom pulling mechanism, located at the bottom of the curing chamber, for driving the film-covered shed to expand / contract along the width of the curing chamber; and a traction mechanism, located near the exit of the curing chamber, for driving the film-covered shed to expand / contract along the length of the curing chamber.

[0009] The air duct assembly includes several sets of atomizing pipes arranged on a telescopic frame and ventilation pipes connected to the covered shed.

[0010] Furthermore, the telescopic frame includes a fixed tube suspended in the steam curing chamber, a telescopic curved rod movably placed in the fixed tube, and an L-shaped tube movably connected to the telescopic curved rod; the atomizing tube is movably placed on the telescopic frame through several fasteners, and atomizing nozzles are evenly distributed on the atomizing tube; the front and rear ends of the elastic membrane are fixedly connected to the first and last telescopic frames arranged in the length direction, while the left and right ends of the elastic membrane are connected to the horizontal end of the L-shaped tube, and the middle position of the elastic membrane is connected to the telescopic frame through fasteners.

[0011] Furthermore, the top lifting mechanism includes: a power unit, at least two sets of which are vertically fixed to the top of the steam curing chamber; a first long plate, which is arranged along the length of the steam curing chamber and connected to the output end of the power unit; a first T-slot, which is formed on the lower surface of the first long plate; a number of first T-blocks, which are movably placed in the first T-slots; a number of connecting blocks, which are respectively connected to the vertical blocks of the number of first T-blocks; and connecting members, which independently connect the number of fixed pipes and the number of connecting blocks.

[0012] Furthermore, the bottom pulling mechanism includes: a lead screw, rotatably installed in an installation slot opened along the width of the steam curing chamber; a guide rod, fixedly installed in two other installation slots opened along the width of the steam curing chamber; a sealing slider, movably sealed within the installation slot, one of the sealing sliders being connected to the lead screw via a ball nut pair, and the other two sealing sliders being movably sleeved on the guide rod via guide sleeves; a second long plate, at least two of which are movably attached to the floor of the steam curing chamber and connected to the sealing sliders; a second T-slot, opened along the length of the second long plate, with the opening of the second T-slot facing the horizontal direction of the L-shaped tube; and a second T-block, several of which are movably placed within the second T-slot, and each second T-block being connected to the horizontal tube of the L-shaped tube.

[0013] Furthermore, one end of the atomizing tube is fixedly connected to the vertical tube of the L-shaped tube, and the other end of the tube is in a free-moving state. A sealing rod is fixed on the horizontal block of the second T-shaped block, and the sealing rod is placed below the horizontal tube of the L-shaped tube. The sealing rod is movably and sealingly inserted into the free-moving tube of the atomizing tube.

[0014] Furthermore, the traction mechanism includes: a drive wheel, movably disposed within the second T-slot, with its axle extending to the outside of the second long plate; a support plate, movably disposed on the outer side of the second long plate, and rotatably connected to the axle; a power motor, fixedly mounted on the support plate, with its output end connected to the axle; and a traction rod, one end of which is connected to the support plate, and the other end of which is connected to the second T-block near the support plate.

[0015] Furthermore, a bladder-shaped expansion strip is connected to the elastic membrane between the horizontal tubes of two adjacent L-shaped tubes, and the bladder-shaped expansion strip is located in the narrow opening of the second T-shaped groove; the two ends of the bladder-shaped expansion strip are respectively connected to two adjacent second T-shaped blocks; in the two adjacent second T-shaped blocks, a guide tube is fixed on one of the second T-shaped blocks, and a connecting tube is fixed on the other second T-shaped block, and the guide tube and the connecting tube are both located in the same bladder-shaped expansion strip; one end of the guide tube located in the same bladder-shaped expansion strip is in a closed state and is movably inserted into the connecting tube, and the guide sleeve located on the same second T-shaped block is connected to the connecting tube, and the outer wall of the guide tube is provided with an air jet hole; the bladder-shaped expansion strip connected to the second T-shaped block near the traction mechanism is connected to an air inlet pipe, and the air inlet pipe is connected to the air pump assembly in the steam curing chamber; the last bladder-shaped expansion strip away from the traction mechanism is only connected to an air extraction pipe, and its air extraction pipe is connected to the air pump assembly.

[0016] Furthermore, the floor of the curing chamber is equipped with embedded guide rails along its length, and a track trolley moves within the curing chamber to transfer the prefabricated components to be cured; the rear of the film-covered shed is sealed by a sealing plate, and the front of the film-covered shed is sealed by a detachable sealing plate on the track trolley; an elastic sealing strip is connected to the end of the sealing plate near the traction mechanism.

[0017] Furthermore, the duct assembly includes a ventilation main pipe and a steam main pipe that are respectively connected to the air source heat pump unit, a fan fixed on the steam curing chamber, and a distribution hose. The inlets of the two fans are respectively connected to the ventilation main pipe and the steam main pipe, and the outlets of the two fans are respectively connected to the atomizing pipe and the ventilation pipe through two distribution hoses.

[0018] The present invention has the following beneficial effects:

[0019] This solution cleverly uses an air source heat pump unit to circulate heat to the steam curing chamber. Compared with the traditional method of using a boiler for heating, it can not only achieve "staged automatic temperature control", but also achieve energy saving, environmental protection and safety. The steam curing chamber is equipped with a membrane shed that can be expanded or reduced in three dimensions, so that prefabricated components of different sizes can be steam cured in a membrane-type manner in the steam curing chamber, while also reducing unnecessary energy waste.

[0020] Because the elastic membrane is wrapped around several telescopic frames, it will stretch or shrink synchronously regardless of how the telescopic frames shrink or expand. This prevents gaps between the elastic membrane and the telescopic frames at both ends. Furthermore, the traction mechanism extends the membrane shed along its length via the bottom traction mechanism, which not only guides the expanding membrane shed but also seals it, preventing gaps between the bottom of the expanding membrane shed and the floor of the curing chamber. Gaps in these gaps would otherwise result in significant loss or leakage of hot steam and heat, leading to unnecessary energy waste.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of 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 structure of several groups of steam curing chambers according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a single steam curing chamber according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the unfolded state of the membrane-covered tent according to an embodiment of the present invention;

[0026] Figure 4 This is a bottom view of a film-covered shed according to an embodiment of the present invention;

[0027] Figure 5 This is an exploded assembly view of the film-covered shed, the top lifting mechanism, and the bottom pulling mechanism according to an embodiment of the present invention;

[0028] Figure 6This is a schematic diagram showing the arrangement of several sets of telescopic frames according to embodiments of the present invention;

[0029] Figure 7 A schematic diagram of the structure of a single telescopic frame according to an embodiment of the present invention;

[0030] Figure 8 This is a cross-sectional view of a bladder-shaped expansion strip according to an embodiment of the present invention.

[0031] In the diagram: 1. Steam curing chamber; 2. Air source heat pump unit; 3. Duct assembly; 31. Atomizing pipe; 32. Ventilation pipe; 33. Diverter hose; 4. Covered shed; 41. Telescopic frame; 42. Elastic membrane; 43. Fixing pipe; 44. Telescopic bend; 45. L-shaped pipe; 46. Fastener; 47. Sealing plate; 5. Top lifting mechanism; 51. Power unit; 52. First long plate; 53. First T-slot; 54. Connecting block; 55. Connector; 56. First T 6. Molded block; 6. Bottom traction mechanism; 61. Lead screw; 62. Guide rod; 63. Sealing slider; 64. Second long plate; 65. Second T-slot; 66. Second T-block; 67. Sealing rod; 7. Traction mechanism; 71. Drive wheel; 72. Support plate; 73. Traction rod; 74. Bladder-shaped expansion strip; 75. Conductor pipe; 76. Connecting pipe; 77. Air inlet pipe; 78. Air extraction pipe; 8. Guide rail; 9. Track trolley; 91. Sealing plate; 92. Elastic sealing strip. Detailed Implementation

[0032] 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.

[0033] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0034] Please see Figures 1-8As shown, this invention is an air-source heat pump curing system for precast concrete components, including several sets of curing chambers 1, air-source heat pump units 2 and duct assemblies 3 arranged near the curing chambers 1, and further including: a film-covered shed 4, which is placed inside the curing chambers 1 in a retractable and extendable manner; the film-covered shed 4 includes several telescopic frames 41 arranged along the length of the curing chamber 1 and an elastic membrane 42 wrapped around the outside of the telescopic frames 41; a top lifting mechanism 5, located at the top of the curing chamber 1, for driving the film-covered shed 4 to expand / contract along the height of the curing chamber 1; a bottom pulling mechanism 6, located at the bottom of the curing chamber 1, for driving the film-covered shed 4 to expand / contract along the lateral space of the curing chamber 1; and a traction mechanism 7, located near the outlet of the film-covered shed 4, for driving the film-covered shed 4 to expand / contract along the length of the curing chamber 1; wherein, the duct assembly 3 includes several sets of atomizing pipes 31 arranged on the telescopic frames 41 and ventilation pipes 32 connected to the inside of the film-covered shed 4;

[0035] The floor of the curing chamber 1 is equipped with embedded guide rails 8 along its length, and a track trolley 9 moves inside the curing chamber 1 to transfer the prefabricated components to be cured; the rear of the film-covered shed 4 is sealed by a sealing plate 47, and the front of the film-covered shed 4 is sealed by a detachable sealing plate 91 on the track trolley 9; an elastic sealing strip 92 is connected to the end of the sealing plate 91 near the traction mechanism 7.

[0036] The duct assembly 3 includes a ventilation main pipe and a steam main pipe that are respectively connected to the air source heat pump unit 2, a fan fixed on the steam curing room 1, and a distribution hose 33. The inlets of the two fans are respectively connected to the ventilation main pipe and the steam main pipe, and the outlets of the two fans are respectively connected to the atomizing pipe 31 and the ventilation pipe 32 through the two distribution hoses 33. Adjacent atomizing pipes 31 are connected to each other through a tee pipe and a corrugated hose.

[0037] It should be noted that the film-covered shed 4 is equipped with an intelligent temperature and humidity control system. The system is equipped with a PLC controller, and combined with the temperature sensor in the steam curing space with an accuracy of ±0.5℃, the humidity sensor, and the frequency conversion module of the air source heat pump unit 2, it realizes "staged automatic temperature control". The air source heat pump unit 2 heats the water in the water tank to 50-70℃. The hot water is transported to the finned heat exchanger or the underfloor heating coil through the circulation pump, and then transported to the ventilation pipe 32 laid in the film-covered shed 4 through other pipes of the air duct assembly 3.

[0038] At the same time, hot water will also be transported to the auxiliary steam generator through the circulation pump. The hot water heated by air source provides basic heat energy for the steam generator, and the generated low-pressure steam is 0.1-0.2MPa. Then, it is transported through other pipes of the air duct assembly 3 to the atomizing pipe 31 installed in the film-covered shed 4, and constant humidity control is achieved in conjunction with the humidity sensor.

[0039] As a preferred implementation method of this solution:

[0040] Vertical and lateral expansion of the film-covered shed 4: The operator inputs the dimensions of the precast component to be steam-cured into the steam curing system. The PLC controller of the steam curing system first controls the top lifting mechanism 5 to work, so that it drives several telescopic frames 41 to rise along the height space in the steam curing chamber 1, so that the height of the film-covered shed 4 is slightly greater than the height of the precast component to be steam-cured. Then, it controls the symmetrical bottom pulling mechanism 6 to work, so that it drives several telescopic frames 41 to expand along the width space in the steam curing chamber 1, so that the width dimension of the film-covered shed 4 is slightly greater than the width dimension of the precast component to be steam-cured. No matter how the telescopic frames 41 expand or shrink, the elastic film 42 wrapped around them will stretch or contract synchronously.

[0041] Precast component delivery: The precast concrete components are hoisted onto the track trolley 9, and then the track trolley 9 is moved along the guide rail 8 laid on the ground by traction or its own walking system, so that it can deliver the precast components to be steam cured into the open steam curing chamber 1.

[0042] The film-covered shed 4 extends in length: When the prefabricated components reach the designated position in the steam curing chamber 1, the two sets of traction mechanisms 7 will use the bottom pulling mechanism 6 as a guide to drive the first set of telescopic frames 41 to move towards the open doorway of the steam curing chamber 1. At this time, several sets of telescopic frames 41 that have retracted to the tail of the steam curing chamber 1 will unfold sequentially along the length direction of the top lifting mechanism 5 and the bottom pulling mechanism 6. When several sets of telescopic frames 41 unfold, the corrugated hose connecting two adjacent atomizing tubes 31 will be unfolded. When the telescopic frame 41 approaches, the corrugated hose will be folded. When the traction mechanism 7 moves to a position close to the sealing plate 91, the continued movement of the traction mechanism 7 will push the elastic sealing strip 92 to bend and deform it. When the first telescopic frame 41 is pulled to seal and fit with the sealing plate 91 on the track board 9, the traction mechanism 7 will also pass over the elastic sealing strip 92, so that the elastic sealing strip 92 can fit with the telescopic frame 41, reducing the gap between the film-covered tent 4 and the sealing plate 91 after the length direction is stretched.

[0043] Precast component steam curing: Close the roller shutter doors at both ends of the steam curing chamber 1. The air source heat pump unit 2 heats the water in the water tank to 55-70℃. The hot water is also transported to the auxiliary steam generator through the circulation pump. The hot water heated by the air source provides basic heat energy for the steam generator. The generated low-pressure steam is 0.1-0.2MPa. Then it is transported to the atomizing pipe 31 installed in the film-covered shed 4 through the steam main pipe, fan and distribution hose 33. Constant humidity control is achieved in conjunction with the humidity sensor.

[0044] Meanwhile, the hot water in the water tank will be transported to the finned heat exchanger or floor heating coil through the circulation pump, and then transported to the ventilation pipe 32 laid in the unfolded membrane shed 4 through the ventilation main pipe, another fan and another branch hose 33, and constant temperature control is achieved in conjunction with the temperature sensor.

[0045] It is important to note that: after closing the roller shutter doors at both ends of the steam curing room 1, the indoor temperature needs to be heated from room temperature to 50 degrees Celsius in about 4 hours, then maintained at 50 degrees Celsius for at least 8 hours, and finally lowered from 50 degrees Celsius to room temperature in no more than 4 hours; the entire system must meet the temperature and humidity requirements of all greenhouses, and each air source must be able to start and stop at 55 to 60 degrees Celsius. Each air source has a rated power of 50 kilowatts, and it is planned to operate and allocate multiple units in parallel; the number of atomizing nozzles opened on several atomizing pipes 31 in a single covered greenhouse 4 is 42 to 48, with a flow rate of 0.065-0.1 L / min for each atomizing nozzle, a working pressure of 3-7 MPa, and a planned daily water consumption of 2000 L / 24h / 1 greenhouse;

[0046] Precast component steam curing completed: After the precast components have finished steam curing in the covered shed 4, the heat exchanger in the steam curing chamber 1 is turned on to exchange heat between the hot steam in the covered shed 4 and the air inlet of the air source heat pump unit 2. This preheats the cold air entering the unit, especially in low-temperature winter environments, improving the COP value and energy efficiency ratio of the air source heat pump and reducing energy consumption. Once the temperature inside the covered shed 4 reaches normal operating temperature, the roller shutter door at one end of the steam curing chamber 1 is opened to allow any remaining heat or hot steam to escape. Then, the track trolley 9 is moved by the traction machine or the walking system on its own. The precast components after steam curing are pulled out from the film-covered shed 4, and then precast components of the same shape and size are transported to the film-covered shed 4 for steam curing. If small precast components need to be steam cured, the length of the film-covered shed 4 needs to be reduced to the minimum. The horizontal and vertical space of the film-covered shed 4 is reduced by the top lifting mechanism 5 and the bottom pulling mechanism 6. Then the precast components to be steam cured are pushed into the film-covered shed 4. The length of the reduced film-covered shed 4 is then extended by the pulling mechanism 7, so as to facilitate the adjustment of the overall size of the film-covered shed 4.

[0047] This solution cleverly incorporates a membrane-covered shed 4 within the steam curing chamber 1, which can be expanded or reduced in three dimensions. This membrane-covered shed 4 allows for the membrane-covered steam curing of precast components of different sizes within the steam curing chamber 1, while also effectively reducing unnecessary energy waste.

[0048] Since the elastic membrane 42 is located outside the several telescopic frames 41 in a wrapped state, the elastic membrane 42 will stretch or shrink synchronously no matter how the telescopic frames 41 shrink or expand. This will prevent gaps from forming between the elastic membrane 42 and the telescopic frames 41 at both ends. At the same time, the traction mechanism 7 expands the membrane shed 4 along the bottom traction mechanism 6, which not only guides the membrane shed 4 as it expands in length, but also seals it, preventing gaps from forming between the bottom of the membrane shed 4 as it expands in three dimensions and the floor of the steam curing room 1. This would cause a large amount of hot steam and heat to be lost or leaked from the membrane shed 4, resulting in unnecessary waste of energy.

[0049] See Figure 6 and Figure 7 As shown, the telescopic frame 41 includes a fixed tube 43 suspended in the steam curing chamber 1, a telescopic curved rod 44 movably placed in the fixed tube 43, and an L-shaped tube 45 movably connected to the telescopic curved rod 44; the atomizing tube 31 is movably placed on the telescopic frame 41 by a number of fasteners 46, and atomizing nozzles are evenly distributed on the atomizing tube 31; the front and rear ends of the elastic membrane 42 are fixedly connected to the first and last telescopic frames 41 arranged in the length direction, while the left and right ends of the elastic membrane 42 are connected to the horizontal tube tail of the L-shaped tube 45, and the middle position of the elastic membrane 42 is connected to the telescopic frame 41 by fasteners 46.

[0050] As a preferred embodiment of this solution, the buckle 46 is fixedly placed on the vertical tubes of the fixed tube 43 and the L-shaped tube 45 so that it will not interfere with the movement of the telescopic bending rod 44 inside the vertical tubes of the fixed tube 43 and the L-shaped tube 45. The top lifting mechanism 5 is connected to the fixed tube 43, and the bottom pulling mechanism 6 is connected to the horizontal tube of the L-shaped tube 45.

[0051] The operation of the top lifting mechanism 5 will cause the fixed tube 43 to move up and down, which in turn will cause the vertical rod of the telescopic bending rod 44 to move up and down inside the vertical tube of the L-shaped tube 45, thus facilitating the adjustment of the overall height of the telescopic frame 41. Meanwhile, the symmetrical bottom pulling mechanisms 6 move closer or further apart, which will cause the horizontal rod of the telescopic bending rod 44 to move horizontally inside the fixed tube 43 through several L-shaped tubes 45, thus facilitating the synchronous adjustment of the lateral width of several telescopic frames 41. When the telescopic frame 41 is adjusted in height and lateral direction, since the spray pipe is movably placed inside several fasteners 46, the spray pipe can move freely on the telescopic frame 41 without affecting the height and lateral extension or contraction of the telescopic frame 41.

[0052] See Figures 4 to 7As shown, the top lifting mechanism 5 includes: a power unit 51, at least two sets of which are vertically fixed to the top of the steam curing chamber 1; a first long plate 52, which is arranged along the length of the steam curing chamber 1 and connected to the output end of the power unit 51; a first T-slot 53, which is formed on the lower surface of the first long plate 52; a number of first T-blocks 56, which are movably placed in the first T-slots 53; a number of connecting blocks 54, which are respectively connected to the vertical blocks of the number of first T-blocks 56; and a connecting member 55, which independently connects the number of fixed pipes 43 and the number of connecting blocks 54.

[0053] In a preferred embodiment of this solution, the number of first T-blocks 56 is the same as the number of telescopic frames 41, and the connecting block 54 is sealed through the elastic membrane 42 and connected to the first T-blocks 56. Therefore, when it is necessary to adjust the overall height of several telescopic frames 41, it is necessary to control the output end of the power unit 51, preferably a hydraulic cylinder, a pneumatic cylinder, or an electric telescopic rod, to extend or retract, so that it drives the first long plate 52 to rise or fall in the steam curing chamber 1. Since several first T-blocks 56 cooperate with the first long plate 52 through the first T-slot 53, the lifting and lowering of the first long plate 52 will drive several fixed pipes 43 to rise and fall synchronously through several first T-blocks 56, connecting blocks 54 and connecting parts 55. The fixed pipes 43 will drive the vertical pipe of the telescopic curved rod 44 to rise and fall in the vertical pipe of the L-shaped pipe 45, thereby facilitating the adjustment of the height space of the film covering shed 4.

[0054] When the traction mechanism 7 drives several telescopic frames 41 to move horizontally back and forth in the steam curing chamber 1, several fixed pipes 43 will drive the first T-shaped block 56 to slide in the first T-shaped groove 53 through the connector 55 and the connecting block 54. This allows the first long plate 52 to adjust the height of the telescopic frames 41 through the structure of several first T-shaped blocks 56, without interfering with the extension or retraction of several telescopic frames 41 along the length direction in the steam curing chamber 1.

[0055] See Figure 4 and Figure 5As shown, the bottom pulling mechanism 6 includes: a lead screw 61, rotatably installed in an installation slot opened along the width of the space inside the steam curing chamber 1; a guide rod 62, fixedly installed in two other installation slots opened along the width of the space inside the steam curing chamber 1; a sealing slider 63, movably sealed in the installation slot, one of the sealing sliders 63 being connected to the lead screw 61 via a ball nut pair, and the other two sealing sliders 63 being movably sleeved on the guide rod 62 via guide sleeves; a second long plate 64, at least two of which are movably attached to the ground of the steam curing chamber 1 and connected to the sealing slider 63; a second T-slot 65, opened along the length of the second long plate 64, with the opening of the second T-slot 65 facing the horizontal pipe direction of the L-shaped tube 45; and a second T-block 66, several of which are movably placed in the second T-slot 65, and each second T-block 66 is connected to the horizontal pipe of the L-shaped tube 45.

[0056] In a preferred embodiment of this solution, the number of second T-blocks 66 is the same as the number of telescopic frames 41, the bottom surface of the second long plate 64 is sealed and slidably attached to the ground of the steam curing chamber 1 through a rubber sealing layer, and the outer wall of the sealing slider 63 is also sealed and slidably attached to the groove wall of the installation groove through a rubber sealing layer.

[0057] The servo motor is embedded in the floor of the steam curing chamber 1 or connected to the lead screw 61 via a synchronous belt drive. Therefore, the operation of the servo motor will cause the sealing slider 63 to slide in the mounting groove through the cooperation of the lead screw 61 and the ball nut pair. This will allow the two symmetrical second long plates 64 to slide away from or towards each other on the floor of the steam curing chamber 1. At this time, the cooperation between the guide rod 62 and the sealing slider 63 can guide and support the sliding second long plates 64. This will allow the sliding second long plates 64 to move away from or towards each other through several second T-shaped blocks 66, which will drive several sets of symmetrical L-shaped tubes 45 to move away from or towards each other. This will allow several telescopic frames 41 to extend or retract within the fixed tubes 43, thereby facilitating the adjustment of the overall width of the film covering shed 4.

[0058] When the traction mechanism 7 drives the film-covered shed 4 to extend or retract along its length in the steam curing chamber 1, the traction mechanism 7 will slide through several second T-shaped blocks 66 in the second T-shaped grooves 65, causing it to drive several sets of telescopic frames 41 to slide at equal intervals in the steam curing chamber 1, thereby facilitating the extension and retraction of the film-covered shed 4.

[0059] See Figure 6 and Figure 7As shown, one end of the atomizing tube 31 is fixedly connected to the vertical tube of the L-shaped tube 45, and the other end of the tube is in a free-moving state. A sealing rod 67 is fixed on the horizontal block of the second T-shaped block 66, and the sealing rod 67 is placed below the horizontal tube of the L-shaped tube 45. The sealing rod 67 is movably and sealingly inserted into the free-moving tube of the atomizing tube 31.

[0060] As a preferred embodiment of this solution, in order to prevent the length of the "door-shaped" atomizing pipe 31 located inside the film-covered shed 4 from not being able to grow or decrease synchronously with the telescopic frame 41 when the telescopic frame 41 stretches or contracts in the width and height directions, which would affect the steam curing effect of the deformed film-covered shed 4 on the precast components.

[0061] This design cleverly incorporates a sealing rod 67 that is slidably inserted into the free end of the atomizing tube 31, while the other end of the atomizing tube 31 remains fixed. The tube body of the atomizing tube 31 is connected to the telescopic frame 41 via a movable connection, and the sealing rod 67 is fixedly connected to the second T-block 66. Therefore, when the telescopic frame 41 expands outwards, the free end of the atomizing tube 31 slides along the body of the sealing rod 67 away from the second T-block 66, causing the sealing rod 67 to exit from the atomizing tube 31. This not only allows the length of the atomizing tube 31 to increase synchronously with the expanding telescopic frame 41, but also... It can also open the blocked atomizing nozzles. When the telescopic frame 41 shrinks, the free end of the atomizing tube 31 will slide along the body of the sealing rod 67 towards the second T-shaped block 66, so that the sealing rod 67 is inserted into the atomizing tube 31. This allows the excess atomizing tube 31 to slide to the bottom of the horizontal tube of the L-shaped tube 45 for concealment. At the same time, the atomizing nozzles of the atomizing tube 31 can also be blocked by the inserted sealing rod 67, reducing the unnecessary waste of water vapor energy caused by water vapor being sprayed out from other atomizing nozzles because some of the atomizing tubes 31 are not in the "door frame" of the film covering shed 4.

[0062] See Figure 4 and Figure 5 As shown, the traction mechanism 7 includes: a drive wheel 71, movably disposed within the second T-slot 65, with the axle of the drive wheel 71 extending to the outside of the second long plate 64; a support plate 72, movably disposed on the outer side of the second long plate 64, and rotatably connected to the axle; a power motor, fixedly mounted on the support plate 72, with the output end of the power motor connected to the axle; and a traction rod 73, one end of which is connected to the support plate 72, and the other end of which is connected to the second T-block 66 near the support plate 72.

[0063] It should be noted that, in order to increase the efficiency of the horizontal expansion of the film-covered tent 4, it is preferable to replace the drive wheel 71 with a gear, and embed a rack into the bottom or top of the second T-slot 65, so that the output shaft of the power motor drives the gear and the rack to mesh, thereby driving the support plate 72 to slide along the length of the second long plate 64, so that multiple second T-blocks 66 can slide stably in the second T-slot 65, expanding or contracting the film-covered tent 4 in the length direction. The extended wheel axle can be supported by the bearing rolling contact with the narrow opening of the second T-slot 65. The left and right width of the second T-block 66 is larger than the width of the embedded rack, so that it will not interfere with the sliding of the second T-block 66 in the second T-slot 65.

[0064] In a preferred embodiment of this solution, after the height and width of the film-covered shed 4 are adjusted, and the prefabricated components to be cured are moved to the designated position in the curing chamber 1, the power motors fixed on the two support plates 72 are simultaneously started. These motors drive the drive wheel 71 to slide within the second T-groove 65 via the output shaft and axle. When the support plate 72 moves along the length of the second long plate 64, the support plate 72, through the traction rod 73, drives the second T-shaped block 66 near the drive wheel 71 to slide within the second T-groove 65. Furthermore, as the drive wheel 71 continuously slides within the second T-groove 65... 5. Sliding inside, at this time, several second T-shaped blocks 66 will drive several sets of telescopic frames 41 to extend and move along the length direction of the second long plate 64, so that the continuously extending cover of the membrane shed 4 gradually covers the concrete precast component, until the membrane shed 4 is moved to cover the concrete precast component, and the opening of the membrane shed 4 will be attached to the sealing plate 91, so that the inside of the membrane shed 4 forms a closed environment. The sealing plate 91 installed on the preferred track plate 9 can be disassembled and replaced according to the size of the precast component to be steam cured, so as to facilitate the sealing treatment of the cover of the membrane shed 4 after expansion or reduction.

[0065] After the precast components have been steam-cured and the steam curing chamber 1 and the covered shed 4 have reached the appropriate temperature and humidity, the roller shutter door of the steam curing chamber 1 is opened first. Then, the track trolley 9 and the steam-cured precast components are pulled out of the covered shed 4 by the traction machine or the walking system on the track trolley 9. Then, precast components of the same shape and size are transported to the covered shed 4 for steam curing.

[0066] See Figures 6 to 8As shown, a bladder-shaped expansion strip 74 is connected to the elastic membrane 42 between the horizontal tubes of two adjacent L-shaped tubes 45, and the bladder-shaped expansion strip 74 is located within the narrow opening of the second T-shaped groove 65. The two ends of the bladder-shaped expansion strip 74 are respectively connected to two adjacent second T-shaped blocks 66. In one of the two adjacent second T-shaped blocks 66, a conductive tube 75 is fixedly mounted on one of the second T-shaped blocks 66, and a connecting tube 76 is fixedly mounted on the other second T-shaped block 66. Both the conductive tube 75 and the connecting tube 76 are located within the same bladder-shaped expansion strip 74. One end of the guide tube 75 inside the bladder-shaped expansion strip 74 is closed and is movably inserted into the connecting tube 76. The guide sleeve located on the same second T-shaped block 66 is connected to the connecting tube 76. The outer wall of the guide tube 75 is provided with an air jet hole. The bladder-shaped expansion strip 74 connected to the second T-shaped block 66 near the traction mechanism 7 is connected to an air inlet pipe 77, and the air inlet pipe 77 is connected to the air pump assembly in the steam curing chamber 1. The last bladder-shaped expansion strip 74 away from the traction mechanism 7 is only connected to an air extraction pipe 78, and its air extraction pipe 78 is connected to the air pump assembly.

[0067] As a preferred embodiment of this solution, in order to prevent the friction of several second T-shaped blocks 66 in the second T-shaped groove 65 from being too large, which would affect the stable unfolding of the film covering shed 4 along the length direction, and at the same time, the gap between the two separated T-shaped blocks and the elastic membrane 42 would also cause a large amount of water vapor sprayed in the film covering shed 4 to leak.

[0068] Therefore, when the drive wheel 71 moves within the second T-slot 65, causing the first second T-block 66 closest to the support plate 72 to slide via the support plate 72 and the traction rod 73, the air pump assembly's inflation pump delivers airflow through the air inlet pipe 77 to the bladder-shaped expansion strip 74 connecting the first and second second T-blocks 66. This causes the bladder-shaped expansion strip 74 to expand within the narrow opening of the second T-slot 65. The expanding bladder-shaped expansion strip 74 then exerts a thrust on the first sliding second T-block 66, accelerating its sliding speed within the second T-slot 65. When the first and second second T-blocks 66 separate, the first second T-block 66 causes the guide pipe 75 to withdraw from the connecting pipe 76. The connecting pipe 76 and the guide pipe 75 on the second second T-block 66 are connected, and the airflow entering the first bladder-shaped expansion strip 74 is delivered to the bladder-shaped expansion strip 74 connecting the second second T-block 66 and the third second T-block 66 through the connecting pipe 76, the guide pipe 75 and the air jet hole on the guide pipe 75. This allows the bladder-shaped expansion strip 74 to push the second second T-block 66 to slide in the second T-shaped groove 65. Similarly, as the distance between two adjacent second T-blocks 66 increases and they separate, the guide pipe 75 will disengage from the corresponding connecting pipe 76 in turn, thus connecting the two adjacent bladder-shaped expansion strips 74. The expansion of the bladder-shaped expansion strip 74 can then first boost the second T-block 66.

[0069] When the film-covered shed 4 extends to the appropriate position along its length, multiple bladder-shaped expansion strips 74 are in a connected state; the air inlet pipe 77 continuously inflates the bladder-shaped expansion strips 74, causing the bladder-shaped expansion strips 74 to expand vertically within the narrow opening of the second T-shaped groove 65; since the bladder-shaped expansion strips 74 are connected to the elastic membrane 42, the elastic membrane 42 can limit the lateral expansion of the bladder-shaped expansion strips 74, thereby allowing the expanded bladder-shaped expansion strips 74 to fit against the upper and lower groove walls of the second T-shaped groove 65, thus sealing the narrow opening of the second T-shaped groove 65 and preventing a large amount of water vapor entering the film-covered shed 4 from leaking out from the gap formed by the elastic membrane 42 and the narrow opening of the second T-shaped groove 65;

[0070] When the film-covered shed 4 retracts in the front-to-back direction within the steam curing chamber 1, the air pump of the air pump assembly extracts gas from the last bladder-shaped expansion strip 74 through the air extraction pipe 78. This allows the bladder-shaped expansion strip 74 to pull the penultimate second T-shaped block 66. Simultaneously, the connecting pipe 76 on the penultimate second T-shaped block 66 applies the suction force generated by the air extraction pipe 78 to the penultimate bladder-shaped expansion strip 74, enabling it to extract the airflow from the penultimate bladder-shaped expansion strip 74. This allows the bladder-shaped expansion strip 74 to pull the penultimate second T-shaped block 66 during retraction, and so on. When the traction mechanism 7 drives several second T-shaped blocks 66 to slide towards the rear of the steam curing chamber 1 within the second T-shaped groove 65, the sequentially retracting bladder-shaped expansion strips 74 at the tail end can generate a pulling force on the repositioned and sliding second T-shaped blocks 66, thereby accelerating the retraction efficiency of the film-covered shed 4.

[0071] It should be noted that the length of the connecting tube 75 and the connecting tube 76, which are located within the same bladder-shaped expansion strip 74, after being inserted into each other is less than the length of the bladder-shaped expansion strip 74 after compression (this will not interfere with the maximum distance between two adjacent second T-shaped blocks 66 after the film-covered shed 4 shrinks). Furthermore, when the film-covered shed 4 shrinks, the connecting tube 75 within the same bladder-shaped expansion strip 74 is only inserted into the connecting tube 76 after the two adjacent second T-shaped blocks 66 have approached each other to almost reach their maximum position, thus sealing the two adjacent bladder-shaped expansion strips 74. The purpose of blocking is to prevent the other two unseparated second T-shaped blocks 66 from being relatively stationary due to the pull of the blocking bladder-shaped expansion strips 74 when the film-covered shed 4 needs to extend a short distance in the longitudinal direction. This prevents the other bladder-shaped expansion strips 74 from expanding synchronously when the first bladder-shaped expansion strip 74 is filled with gas, as they would be in a connected state. This would push the second T-shaped blocks 66, which do not need to slide, to slide freely in the second T-shaped groove 65, thus affecting the effect of the film-covered shed 4 extending a short distance.

[0072] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An air-source heat pump curing system for precast concrete components, comprising several curing chambers, air-source heat pump units and ductwork components arranged near the curing chambers, characterized in that, Also includes: The film-covered shed is placed inside the steam curing room in a retractable and extendable manner. The film-covered shed includes several telescopic frames arranged along the length of the steam curing room and an elastic membrane wrapped around the outside of several sets of telescopic frames. A top lifting mechanism, located at the top of the steam curing chamber, is used to drive the film-covered shed to expand / contract along the height of the steam curing chamber; The bottom traction mechanism, located at the bottom of the steam curing chamber, is used to drive the film-covered shed to expand / contract along the width of the steam curing chamber. The traction mechanism is located near the exit of the steam curing chamber from the covered shed, and is used to drive the covered shed to expand / contract along the length of the steam curing chamber; The air duct assembly includes several sets of atomizing pipes arranged on a telescopic frame and ventilation pipes connected to the covered shed. The telescopic frame includes a fixed tube suspended in the steam curing room, a telescopic curved rod movable in the fixed tube, and an L-shaped tube movably connected to the telescopic curved rod. The atomizing tube is movably mounted on the telescopic frame by several fasteners, and atomizing nozzles are evenly distributed on the atomizing tube. The front and rear ends of the elastic membrane are fixedly connected to two telescopic frames arranged in the length direction, while the left and right ends of the elastic membrane are connected to the horizontal end of the L-shaped tube, and the middle part of the elastic membrane is connected to the telescopic frame through a fastener. The bottom traction mechanism includes: The lead screw is rotatably installed into the mounting slot opened along the width of the space inside the steam curing chamber; The guide rod is fixedly installed in two other mounting slots opened along the width of the space inside the steam curing chamber; The sealing slider is placed in the mounting groove. One of the sealing sliders is connected to the lead screw through a ball nut pair, and the other two sealing sliders are movably sleeved on the guide rod through guide sleeves. The second long plate, with at least two movable parts, is attached to the floor of the steam curing chamber and is connected to the sealing slider. The second T-slot is opened along the length of the second long plate, and the opening of the second T-slot faces the horizontal direction of the L-shaped tube. And a second T-shaped block, several of which are movably placed in the second T-shaped groove, and each second T-shaped block is connected to the horizontal pipe of the L-shaped tube; One end of the atomizing tube is fixedly connected to the vertical tube of the L-shaped tube, and the other end of the tube is in a free-moving state. A sealing rod is fixed on the horizontal block of the second T-shaped block, and the sealing rod is placed below the horizontal tube of the L-shaped tube. The sealing rod is movably and sealingly inserted into the free-moving tube of the atomizing tube.

2. The air-source heat pump curing system for precast concrete components according to claim 1, characterized in that, The top lifting mechanism includes: The power unit, at least two sets, is vertically fixed to the top of the steam curing chamber; The first long plate is laid along the length of the steam curing chamber and is connected to the output end of the power unit; The first T-slot is formed on the lower surface of the first long plate; The first T-shaped block, with several movable parts placed within the first T-shaped groove; Connecting blocks, several of which are connected to the vertical blocks of several first T-shaped blocks respectively; And connectors, a plurality of which independently connect a plurality of fixed tubes and a plurality of connecting blocks.

3. The air-source steam curing system for precast concrete components according to claim 1, characterized in that, The traction mechanism includes: The drive wheel is movably positioned within the second T-slot, and the axle of the drive wheel extends to the outside of the second long plate; A support plate is movably positioned on the outer side of the second long plate, and the support plate is rotatably connected to the wheel axle; The power motor is fixed on the support plate, and the output end of the power motor is connected to the wheel axle; And a traction rod, one end of which is connected to a support plate and the other end of which is connected to a second T-shaped block near the support plate.

4. The air-source heat pump curing system for precast concrete components according to claim 1, characterized in that, An elastic membrane with a bladder-shaped expansion strip is connected between the horizontal tubes of two adjacent L-shaped tubes, and the bladder-shaped expansion strip is located in the narrow opening of the second T-shaped groove; The two ends of the bladder-shaped expansion strip are respectively connected to two adjacent second T-shaped blocks; in the two adjacent second T-shaped blocks, a conduit is fixed on one of the second T-shaped blocks, and a connecting pipe is fixed on the other second T-shaped block, and the conduit and the connecting pipe are both located in the same bladder-shaped expansion strip; One end of the guide tube located within the same bladder-shaped expansion strip is in a closed state and is movably inserted into the connecting tube. The guide sleeve located on the same second T-shaped block is connected to the connecting tube. An air jet hole is provided on the outer wall of the guide tube. An air inlet pipe is connected inside the bladder-shaped expansion strip connected to the second T-block near the traction mechanism, and the air inlet pipe is connected to the air pump assembly in the steam curing chamber. The last bladder-shaped expansion strip, located away from the traction mechanism, is connected only to a suction pipe, which is connected to the air pump assembly.

5. The air-source steam curing system for precast concrete components according to claim 1, characterized in that, The floor of the curing chamber is equipped with embedded guide rails along its length, and a track trolley for transferring the prefabricated components to be cured moves within the curing chamber. The rear of the film-covered shed is sealed by a sealing plate, and the front of the film-covered shed is sealed by a detachable sealing plate on the track board vehicle. The end of the sealing plate near the traction mechanism is connected to an elastic sealing strip.

6. The air-source steam curing system for precast concrete components according to claim 1, characterized in that, The duct assembly includes a ventilation main pipe and a steam main pipe that are respectively connected to the air source heat pump unit, a fan fixed on the steam curing chamber, and a distribution hose. The inlets of the two fans are respectively connected to the ventilation main pipe and the steam main pipe, and the outlets of the two fans are respectively connected to the atomizing pipe and the ventilation pipe through two distribution hoses.

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