A precast concrete component steam curing production line and steam curing method

Abstract

The present invention discloses a steam curing production line and a steam curing method for precast concrete components. The production line is composed of a steam heat source machine system, a steam transmission pipeline, a mold platform, and a steam curing shed. The water is converted into dry steam by the steam heat source machine and distributed to various pipelines through the steam cylinder, and finally enters the steam curing shed of the production line. Each valve on the steam transmission pipeline controls the mold platform group separately, and the temperature and humidity are controlled by the steam curing shed and the temperature and humidity sensing probe. The temperature control during the curing process is divided into heating and then natural cooling, wherein the insulation time of each stage is strictly controlled, and the strength of the component is ensured to meet the specified requirements after the final natural cooling. The present invention saves energy, reduces consumption, reduces emissions and increases efficiency. The cost is low, the floor space is small, the site utilization rate is high, the operation flexibility is high, the curing effect is good, the demoulding time is shortened, the demoulding strength is improved, the production efficiency is improved, there is no crack on the surface of the component, and the utilization rate of thermal energy is high.

Description

Technical Field

[0001] The invention relates to a precast concrete component steam curing production line and a steam curing method, belonging to the technical field of precast concrete component curing. Background Art

[0002] The traditional steam curing production line for precast concrete components consists of a mold table, a transmission pulley and a steam curing kiln. After the workers complete the steel bar binding, they are transferred forward to the vibration table for pouring and vibrating. If the efficiency of one link is too slow, the workers in the subsequent links cannot continue to work, which greatly reduces the work efficiency. When pouring concrete, only one board can be poured at the same time, and the vibration table can only vibrate one mold table at the same time. After that, it is transferred to the steam curing kiln for curing. After the curing is completed, it is transferred to the board discharge point for loading. Therefore, the traditional steam curing production line for precast concrete components requires the purchase of a large number of equipment, which is expensive and requires a large amount of space, but the number of mold tables that can be produced at the same time is small, and the site utilization rate is low. Production can only be carried out according to the process. Once there is a problem with the intermediate transmission pulley and the mold table cannot continue to be transferred forward, the subsequent mold table production will be affected and accidents are prone to occur. During the curing process, heat will be generated inside the precast concrete component, which makes it easy for the internal temperature to be too high and damage the internal structure, so that its overall strength does not meet the requirements, and cracks are prone to appear on the surface, making the actual strength lower than the design strength. In addition, traditional boilers are special equipment that need to be approved for annual inspection; the initial heating takes 20 to 40 minutes; the softened water system is prone to scaling, which reduces thermal efficiency; the conductivity of the material inside the furnace is low; the equipment is insulated during production and has excess capacity; NOx emissions are far higher than national standards; and there are major safety hazards. Summary of the invention

[0003] The object of the present invention is to provide a precast concrete component steam curing production line and a steam curing method.

[0004] The technical solution provided by the present invention is as follows: a precast concrete component steam curing production line, which includes a steam heat source room, a mold platform, a steam transmission pipeline, and a steam curing shed; characterized in that:

[0005] The steam heat source machine room is equipped with a main control console, a water storage tank, a pure water machine, a water storage tank, a water feed pump, a steam heat source machine, a sub-cylinder and an automatic temperature and humidity adjustment system. The main control console is respectively connected to the water storage tank, the steam heat source machine, the water feed pump, and the automatic temperature and humidity adjustment system. The water storage tank is connected to the pure water machine, the pure water machine is connected to the water storage tank, the water storage tank is connected to the water feed pump, the water feed pump is connected to the steam heat source machine, the steam heat source machine is connected to the sub-cylinder, and the sub-cylinder is provided with two steam outlets, which are connected to the steam delivery pipelines of the two production lines. Steam is delivered from the sub-cylinder to different mold tables through the steam delivery pipeline;

[0006] The mold platform includes a plurality of mold platform groups consisting of large mold platform units and small mold platform units. The small mold platform units and the large mold platform units are welded by a mold platform bottom plate and a mold platform frame thereon; the mold platform frame is connected by two long frames, two short frames, evenly distributed I-beam frames and angle steel frames, the short frames are connected between the two ends of the two long frames, the I-beam frames are connected between the two long frames, and the angle steel frames are connected between the middle parts of two adjacent I-beam frames and between the I-beam frame and the middle part of the short frame; each mold platform group is installed with a temperature sensing probe and a humidity sensing probe, and the temperature sensing probe and the humidity sensing probe are connected to the temperature and humidity automatic adjustment system in the steam heat source room through line 2;

[0007] The steam delivery pipeline is connected to the DN50 main pipeline, and the DN50 main pipeline runs through the entire production line. A DN32 branch pipeline and a DN20 drain pipeline are provided under each die set, and the DN32 branch pipeline is connected to the DN20 drain pipeline; each DN32 branch pipeline is connected to the DN50 main pipeline; the DN32 branch pipeline is connected with a pipeline connecting elbow at the corner, and the DN20 drain pipeline is connected with a pipeline connecting elbow at the corner. The connection between the DN32 branch pipeline and the DN20 drain pipeline is connected with an elbow, and the horizontal height of the rear half of the elbow is reduced; a DN50 steam valve is installed on the DN32 branch pipeline under each die set, and a DN20 drain valve is installed on the DN20 drain pipeline under each die set. The DN50 steam valve and the DN20 drain valve are connected to the pipelines on both sides of the two valves through DN32 flanges and DN20 flanges respectively; the DN50 steam valve and DN20 drain valve of each die set are connected to a solenoid valve, and the solenoid valve is connected to the main control console through line 1;

[0008] The DN32 branch pipe is evenly distributed with circular steam injection holes, the angle α between the center of the circular steam injection hole and the center of the pipe cross section of the DN32 branch pipe and the vertical direction is 45 degrees, the spacing between adjacent circular steam injection holes is 1m, and the circular steam injection holes are cross-arranged on both sides of the DN32 branch pipe;

[0009] A mobile vibrator is arranged on the long frames on both sides below the mold platform, and the mobile vibrator includes a vibrator seat, a vibrator engine and a vibrator are arranged on the vibrator seat, a buckle is connected to the vibrator engine, a pulley is arranged at the lower end of the vibrator seat, and the pulley is connected to the vibrator engine; a track is arranged below the mold platform, and the pulley is placed on the track; the vibrator engine is connected to the main control console;

[0010] A plurality of spacer iron pieces are arranged under each die set.

[0011] Furthermore, the formwork table includes 11 large formwork table units of 4*12m and 12 small formwork table units of 4*9m, including 10 first formwork table groups each 21m long consisting of a 4*9m small formwork table unit and a 4*12m large formwork table unit, 1 second formwork table group 18m long consisting of two 4*9m small formwork table units and a third formwork table group consisting of a single 4*12m large formwork table unit; the I-beam frame is 3.8m long, with a total of 15 pieces; the long frame is made of 28a channel steel, the short frame is made of 20a channel steel, the I-beam frame is made of 20a I-beam, and the angle steel frame is made of 10 / 8 hot-rolled unequal angle steel.

[0012] Furthermore, the DN32 branch pipe is 23m long, the DN20 drain pipe is 2m long, and the diameter of the circular steam injection hole is 5mm.

[0013] Furthermore, the pad iron piece is composed of a pad bottom plate, a pad side plate, a pad I-beam, a pad top plate and a pad baffle; four reserved bolt holes are provided on the pad bottom plate, which are connected to the reserved holes on the ground by bolts to fix the entire iron piece to the ground; two pad side plates are welded and connected on the pad bottom plate, and the pad I-beam is connected between the two pad side plates to prevent the pad I-beam from lateral slippage; the pad I-beam is initially movably connected to the pad side plate, and after the mold platform is leveled, the height between the pad I-beam and the pad bottom plate is adjusted according to the height difference, and then fixed by welding; the pad top plate is connected to the pad I-beam, and two pad baffles are welded on the pad top plate, and the spacing between the two pad baffles matches the spacing size of the two long frames of the mold platform. When the mold platform is placed, the two pad baffles can clamp the long frames.

[0014] Furthermore, the steam curing shed comprises a steam curing shed frame, a plastic tarpaulin and a track wheel mechanism, characterized in that the steam curing shed frame is a retractable steam curing shed frame, which is composed of a plurality of evenly distributed steam curing shed frame units and folding bracket units connected between the steam curing shed frame units, each steam curing shed frame unit comprises two square steel tube main frames and a bent square steel tube curved beam connected between the upper ends of the two square steel tube main frames, and each square steel tube main frame is provided with a sliding node that can slide up and down; the folding bracket unit comprises a first folding bracket and a second folding bracket arranged crosswise, the lower end of the first folding bracket and the lower end of the second folding bracket are respectively connected to the sliding nodes of the two adjacent square steel tube main frames by screws, and the upper end of the first folding bracket and the upper end of the second folding bracket are respectively fixed to the two adjacent square steel tube main frames by screws; the track wheel mechanism comprises two steel tube guide rails and a plurality of evenly distributed guide wheels, the lower end of each square steel tube main frame is connected to a guide wheel by screws, and the guide wheel is placed on the guide rail.

[0015] Furthermore, the plastic tarpaulin includes an inner tarpaulin and an outer tarpaulin. The entire length of the inner tarpaulin is arranged on the inner side of the retractable steaming shed frame, and the inner tarpaulin is connected to the square steel tube main frame and the square steel tube curved beam of each steaming shed frame unit; the outer tarpaulin is arranged at both ends of the retractable steaming shed frame, and the outer tarpaulin is connected to the upper part of the square steel tube main frame and the square steel tube curved beam of the steaming shed frame units at both ends; the inner tarpaulin and the outer tarpaulin are overlapped on the square steel tube curved beams of the steaming shed frame units at both ends, and the fixing nails fix the inner tarpaulin and the outer tarpaulin at the same time; the outer tarpaulin and the inner tarpaulin are movably connected by nylon buckles.

[0016] A steam curing production method for precast concrete components, which specifically comprises the following steps:

[0017] 1) The precast concrete component steam curing production line is started and closed through the main control console, and the parameter data of each curing shed is set. The following parameters are set according to the ambient temperature T:

[0018] In the resting stage, set the temperature value T0=T and the relative humidity value H0=50%, T0 is greater than or equal to 5, and when the ambient temperature T is lower than 5 degrees Celsius, T0=5, and the resting time is 2 hours;

[0019] In the first heating stage, set the temperature value T1 = T0 + 10 and the relative humidity value H1 = 95%, and the duration value is 1 hour;

[0020] The first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour;

[0021] In the second heating stage, the temperature value T2 = T1 + 10 and the relative humidity value H2 = 95% are set, and the duration value is 1 hour;

[0022] The second constant temperature maintains the temperature value T2 and the relative humidity value H2 for 1 hour;

[0023] In the third heating stage, the temperature value T3 = T2 + 10 and the relative humidity value H3 = 95%, the duration value is 1 hour, 50 < T3 < 60;

[0024] The third constant temperature maintenance temperature value T3 and relative humidity value H3, the duration value is 1 hour;

[0025] In the first cooling stage, set the temperature value T4 = T3-10 and the relative humidity value H4 = 90%, and the duration value is 1 hour;

[0026] In the second cooling stage, the temperature value T5 = T4-10 and the relative humidity value H5 = 90% are set, and the duration value is 1 hour;

[0027] 2) After the precast concrete components are poured, the main control console controls the vibrator engine of the mobile vibrator to drive the pulley to move along the track to the bottom of the formwork platform, and the buckle clamps the mobile vibrator tightly on the formwork platform to fully vibrate the concrete on the formwork platform;

[0028] 3) After the vibration is completed, the main control console controls to start the steam curing shed engine. When the steam curing shed is not in use, it is in a retracted state. When the formwork platform needs to be cured, the main control console starts the steam curing shed engine to drive the retractable steam curing shed frame to extend, and the guide wheel moves along the guide rail. As the spacing between adjacent steam curing shed frame units gradually increases, the folding bracket rotates around the sliding node on the main frame, pulling the sliding node on the main frame to move upward, realizing the unfolding of the present invention. After unfolding, the entire product is in the shape of a tent, so that the precast concrete components that need to be steamed on the mobile formwork platform are in a closed space; the outer tarpaulin and the inner tarpaulin at the end are glued tightly with nylon buckles to form an airtight closed steam curing space;

[0029] 4) The main control console controls the tap water to enter the water storage tank. When the water level reaches 2 / 3 of the water storage tank, it automatically enters the pure water machine for purification, and the purified water enters the water storage tank for storage; the main control console controls the start-up of the steam heat source machine and the water supply pump. The water supply pump sends the purified pure water in the water storage tank to the steam heat source machine. The steam heat source machine converts the pure water into high-dryness steam at a high speed, and finally enters the steam cylinder;

[0030] 5) Steam is sent from the steam cylinder to the DN32 branch pipes and DN20 drain pipes under different die sets through the delivery pipes and DN50 main pipes; the DN50 steam valve and DN20 drain valve of each die set group are controlled by a solenoid valve. The main control console turns on the switch of the corresponding die set that needs steam maintenance, and transmits the signal to the corresponding solenoid valve through line 1 to start the DN50 steam valve and DN20 drain valve of the corresponding die set. There are circular steam spray holes on the DN32 branch pipes, so that steam can be sprayed in different directions, which is convenient for dry steam to quickly fill the steam maintenance shed, effectively improving the energy utilization efficiency;

[0031] 6) Each die set is equipped with a temperature sensor and a humidity sensor, which convert the measured temperature and humidity into voltage signals and input them into the temperature and humidity automatic adjustment system. The temperature and humidity automatic adjustment system compares and calculates the input signals with the preset temperature and humidity conversion values, and outputs data signals to the main control console, which controls the switch of the DN50 steam valve and DN20 steam trap;

[0032] After the precast concrete components are poured, the resting stage begins; after the initial setting, the temperature rise and constant temperature stage begins, and the first temperature rise, the first constant temperature, the second temperature rise, the second constant temperature, and the third temperature rise are carried out; the third constant temperature; after the temperature rise and constant temperature stage is completed, the cooling stage begins, and the first cooling and the second cooling are carried out;

[0033] Resting. When the temperature and humidity in the steam curing shed do not reach the resting stage temperature value T0 and relative humidity value H0 preset in advance by the main control console, the temperature sensing probe and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the received signal, and control the DN50 steam valve to open, so as to gradually increase the temperature to T0 and the humidity to H0 within 2 hours. When the temperature in the steam curing shed rises to T0 and the humidity reaches H0, the temperature sensing probe and the humidity sensing probe will feed back information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console to stop transmitting steam to the mold platform;

[0034] During the first heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T1 and relative humidity value H1 preset in the main control console during the heating period, the temperature sensing probe and humidity sensing probe will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the transmitted signal, and control the DN50 steam valve to open, so as to gradually increase the temperature to T1 and the humidity to H1 within the set time of 1 hour. When the temperature in the steam curing shed rises to T1 and the humidity reaches H1, the temperature sensing probe and humidity sensing probe will feed back information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console, and stop transmitting steam to the mold, which greatly saves energy;

[0035] After the first temperature rise, the first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour;

[0036] During the second heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T2 and the relative humidity value H2 preset in the main control console for the heating period, the temperature sensing probe and the humidity sensing probe will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the transmitted signal, and control the DN50 steam valve to open, so as to gradually increase the temperature to T2 and the humidity to H2 within the set time of 1 hour. When the temperature in the steam curing shed rises to T2 and the humidity reaches H2, the temperature sensing probe and the humidity sensing probe will feed back the information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console to stop transmitting steam to the mold platform;

[0037] After the second temperature rise, the second constant temperature is maintained at the temperature value T2 and the relative humidity value H2 for 1 hour;

[0038] During the third heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T3 and the relative humidity value H3 preset in the heating period by the main control console, the temperature sensing probe and the humidity sensing probe will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the transmitted signal, and control the DN50 steam valve to open, so as to gradually increase the temperature to T3 and the humidity to H3 within the set time of 1 hour. When the temperature in the steam curing shed rises to T3 and the humidity reaches H3, the temperature sensing probe and the humidity sensing probe will feed back the information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console to stop transmitting steam to the mold platform;

[0039] After the third temperature rise, the third constant temperature is maintained at the temperature value T3 and the relative humidity value H3 for 1 hour;

[0040] After the first cooling, the heating and constant temperature stage is completed, and then the cooling stage begins. When the temperature and humidity in the steam curing shed decrease too quickly and are lower than the lower warning limit temperature T4 and relative humidity value H4 of the cooling period preset in advance by the main control console, the temperature sensing probe and the humidity sensing probe will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the transmitted signal, control the DN50 steam valve to open, and heat and moisturize within the set time of 1 hour. When the temperature in the steam curing shed rises to T4 and the humidity reaches H4, the temperature sensing probe and the humidity sensing probe will feed back information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console to stop transmitting steam to the mold platform;

[0041] The second cooling stage begins after the first cooling stage is completed. When the temperature and humidity in the steam curing shed decrease too quickly and are lower than the lower warning limit temperature T5 and relative humidity value H5 of the cooling period preset in advance by the main control console, the temperature sensing probe and the humidity sensing probe will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system in the steam heat source machine room through line 2. The temperature and humidity automatic adjustment system will send a signal to the solenoid valve through the main control console according to the signal received, control the DN50 steam valve to open, and heat and moisturize within the set time of 1 hour. When the temperature in the steam curing shed rises to T5 and the humidity reaches H5, the temperature sensing probe and the humidity sensing probe will feed back information to the temperature and humidity automatic adjustment system, and control the DN50 steam valve to close through the main control console to stop transmitting steam to the mold platform.

[0042] The beneficial effects of the present invention are as follows: the present invention is composed of a steam heat source machine system, a steam transmission pipeline, a mold platform, and a steam curing shed. The cost is low, the floor space is small, and the site utilization rate is high. The steam heat source machine is driven by natural gas to convert water into dry steam, which is distributed to various pipelines through the cylinder, and finally enters the steam curing shed of the production line. Each valve on the steam transmission pipeline controls the mold platform group separately, and can be produced separately or all at the same time, which saves energy to a great extent. Even if one of the mold platform groups has a problem, it does not affect the use of other mold platform groups, and can greatly reduce the time required for the component to reach the expected strength. During the curing process, the temperature and humidity are controlled by the steam curing shed and the temperature and humidity sensing probe, which can not only accurately control the temperature and humidity, but also the temperature control does not affect the humidity regulation, so the operation flexibility is high. The temperature control during the curing process is divided into heating and then natural cooling, in which the insulation time of each stage is strictly controlled to obtain a good curing effect, and finally after natural cooling, the strength of the component is ensured to meet the specified requirements, thereby achieving the effect of saving energy, reducing costs, and improving production efficiency. Compared with the traditional production line, the present invention can shorten the demoulding time, improve the demoulding strength, and greatly improve the production efficiency. It can be mass-produced, the produced components have no cracks on the surface, and the demoulding time is short; it saves energy, the steam curing shed is always kept at a constant temperature, and the utilization rate of thermal energy is high. Under the premise of ensuring the timely, continuous and stable supply of steam, the present invention achieves efficient energy saving, consumption reduction, emission reduction and efficiency improvement.

[0043] The steam heat source machine adopts a modular design and has many advantages such as distributed nearby installation, automatic control, energy saving, safety, easy maintenance, no need for special personnel on duty, and no need for annual inspection. It saves about 30% energy compared to the comprehensive operation of traditional steam equipment and boiler equipment.

[0044] The steam curing shed of the present invention comprises a retractable steam curing shed frame, a plastic tarpaulin with good heat preservation and a track wheel mechanism. The finished product is simple to manufacture, low in cost and can be mass-produced. During the steam curing of precast concrete components, the steam curing shed is unfolded to be in the shape of a tent, so that the concrete components to be steam-cured on the mobile formwork are in a closed space. After the steam curing environment is generated in the shed, the outer tarpaulin at the end and the inner tarpaulin are glued together with nylon buckles to form an airtight closed steam curing space with good heat preservation and moisture retention effects. Since the tarpaulin is made of airtight plastic material, it is energy-saving and efficient. The retractable steam curing shed frame of the steam curing shed is composed of a plurality of evenly distributed steam curing shed frame units and folding bracket units connected between the steam curing shed frame units. Each steam curing shed frame unit comprises two square steel pipe main frames and a bent square steel pipe curved beam connected between the upper ends of the two square steel pipe main frames. Each square steel pipe main frame is provided with a sliding node that can slide up and down. Each unit is detachable and easy to assemble, suitable for various sizes of molds or combinations of multiple molds; each frame unit of the steam curing shed is connected to two guide wheels, which can be dragged and moved on most flat ground. If installed on the leveling track, it can be retracted and released freely, saving time and effort; according to actual measurements, a sample of the device of the present invention has a total length of 24m in the unfolded state, and the total length in the retracted state can be shortened to 2m, and the actual length is reduced by 92%, which greatly saves the space required to store the device when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 It is a partial schematic diagram of the appearance of the present invention;

[0047] Figure 3 It is a structural schematic diagram of the steam heat source room of the present invention;

[0048] Figure 4 It is a structural schematic diagram of the mold platform of the present invention;

[0049] Figure 5 It is a structural schematic diagram of the pipeline part of the present invention;

[0050] Figure 6 It is a structural schematic diagram of a DN32 branch pipeline of the present invention;

[0051] Figure 7 for Figure 6 AA section view;

[0052] Figure 8 It is a structural schematic diagram of the mobile vibrator of the present invention;

[0053] Fig. 9It is a structural schematic diagram of the spacer iron piece of the present invention;

[0054] Fig.10 It is a schematic diagram of the steam curing shed of the present invention;

[0055] Fig.11 It is a schematic structural diagram of the telescopic steaming shed frame of the present invention in a folded state;

[0056] Fig.12 It is a schematic structural diagram of the telescopic steaming shed frame of the present invention in an unfolded state;

[0057] Fig.13 It is a structural schematic diagram of the steaming shed frame unit and the folding bracket unit of the present invention;

[0058] Fig.14 It is a structural schematic diagram of the steaming shed frame unit and the lower end portion of the folding bracket unit of the present invention;

[0059] Fig.15 It is a structural schematic diagram of the steaming shed frame unit and the upper end portion of the folding bracket unit of the present invention;

[0060] Fig.16 A top view of the inner tarpaulin portion of the present invention;

[0061] Fig.17 is a side view of the inner tarpaulin portion of the present invention;

[0062] Fig.18 It is a side view of the outer tarpaulin part of the present invention. DETAILED DESCRIPTION

[0063] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings:

[0064] like Figure 1 , Figure 2 As shown, a precast concrete component steam curing production line includes a steam heat source room 1, a mold platform, a steam transmission pipeline 2, and a steam curing shed 8.

[0065] like Figure 3As shown, the steam heat source room 1 is provided with a main control console 1-1, a water storage tank 1-2, a pure water machine 1-3, a water storage tank 1-4, a water supply pump 1-5, a steam heat source machine 1-6, a sub-cylinder 1-7 and an automatic temperature and humidity adjustment system 1-8. The main control console 1-1 is respectively connected to the water storage tank 1-2, the steam heat source machine 1-6, the water supply pump 1-5, the automatic temperature and humidity adjustment system 1-8, the water storage tank 1-2 is connected to the pure water machine 1-3, the pure water machine 1-3 is connected to the water storage tank 1-4, the water storage tank 1-4 is connected to the water supply pump 1-5, the water supply pump 1-5 is connected to the steam heat source machine 1-6, the steam heat source machine 1-6 is connected to the sub-cylinder 1-7, and the sub-cylinder 1-7 is provided with two steam outlets, which are connected to the steam delivery pipeline 2 of the two production lines, and the steam is delivered from the sub-cylinder to different mold tables through the steam delivery pipeline 2.

[0066] Pure water machine 1-3 uses multi-stage filter element to purify water, using filtration, adsorption and reverse osmosis physical methods. The principle of reverse osmosis is to apply a greater pressure than the natural osmotic pressure on the raw water side, so that water molecules can reversely osmosis from the high concentration side to the low concentration side. Since the pore size of the reverse osmosis membrane is hundreds or even thousands of times smaller than that of viruses and bacteria, various viruses, bacteria, heavy metals, solid soluble matter, polluted organic matter, calcium and magnesium ions, etc. cannot pass through the reverse osmosis membrane at all, thus achieving the purpose of water purification.

[0067] Steam heat source machine 1-6 subverts the working principle and working process of traditional steam equipment "water storage-heating-water boiling-steam generation". The new "direct steam generation technology" is used to make water flow through the combustion chamber at high speed and instantly convert into steam, thereby reducing the process and links of "water storage-heating-water boiling" of traditional steam equipment. The whole process from startup to steam generation is completed in about 5 seconds. Water is forced to flow from top to bottom in the exchanger, the flame burns at the bottom, and the flue gas flows from bottom to top, continuously transferring heat to the water in the tube through the exchanger and convection. After absorbing heat, the water generates steam and enters the steam-water separator to separate into high-dryness steam.

[0068] like Figure 1 , Figure 4As shown, the mold platform includes 11 4*12m large mold platform units 5 and 12 4*9m small mold platform units 4, with a total length of about 280m. It includes 10 groups of first mold platform groups, each 21m long, consisting of a 4*9m small mold platform unit 4 and a 4*12m large mold platform unit 5, and 1 group of second mold platform groups, 18m long, consisting of two 4*9m small mold platform units, and a third mold platform group, consisting of a single 4*12m large mold platform unit 5. The small mold platform unit 4 and the large mold platform unit 5 have the same structure but different lengths, and are both welded by the mold platform bottom plate 4-5 and the mold platform frame thereon. The mold platform bottom plate 4-5 is made of a 10mm thick hot-rolled steel plate. The formwork frame is composed of two long frames 4-1, two short frames 4-2, evenly distributed I-beam frames 4-3 and angle steel frames 4-4. The short frames 4-2 are connected between the two ends of the two long frames 4-1, 15 3.8m long I-beam frames 4-3 are connected between the two long frames 4-1, and an angle steel frame 4-4 is connected between the middle of two adjacent I-beam frames 4-3 and between the middle of the I-beam frame 4-3 and the short frame 4-2. The long frame 4-1 is made of 28a channel steel, the short frame 4-2 is made of 20a channel steel, the I-beam frame 4-3 is made of 20a I-beam, and the angle steel frame 4-4 is made of 10 / 8 hot-rolled unequal angle steel.

[0069] A temperature sensing probe 10 and a humidity sensing probe 11 are installed on each die set, and the temperature sensing probe 10 and the humidity sensing probe 11 are connected to the temperature and humidity automatic adjustment system 1-8 in the steam heat source room 1 through line 2 13.

[0070] The entire formwork platform is sturdy and durable, has a large load-bearing capacity, can cast multiple groups of components at the same time, and has regular dimensions, which greatly improves the utilization rate of the site and is also more convenient to clean.

[0071] like Figure 1 , Figure 5As shown, the steam delivery pipeline 2 is connected to the DN50 main pipeline 2-1, and the DN50 main pipeline 2-1 runs through the entire production line. A DN32 branch pipeline 2-2 of about 23m, preferably 23m, and a DN20 drain pipeline 2-3 of about 2m, preferably 2m, are provided under each die set. The DN32 branch pipeline 2-2 is connected to the DN20 drain pipeline 2-3. Each DN32 branch pipeline 2-2 is connected to the DN50 main pipeline 2-1. The connection between the DN32 branch pipeline 2-2 and the DN50 main pipeline 2-1 is welded, the corner of the DN32 branch pipeline 2-2 is connected by a pipeline connection elbow, the corner of the DN20 drain pipeline 2-3 is connected by a pipeline connection elbow, and the connection between the DN32 branch pipeline 2-2 and the DN20 drain pipeline 2-3 is connected by an elbow 2-5. The horizontal height of the rear half of the elbow 2-5 is reduced to facilitate the DN20 drain pipeline 2-3 to pass under the DN50 main pipeline 2-1. A DN50 steam valve 6 is installed on the DN32 branch pipe 2-2 under each die set, and a DN20 steam trap 7 is installed on the DN20 steam trap pipe 2-3 under each die set. The DN50 steam valve 6 and the DN20 steam trap 7 are connected to the pipes on both sides of the two valves through the DN32 flange 6-1 and the DN20 flange 7-1 respectively. The DN50 steam valve 6 and the DN20 steam trap 7 of each die set are connected to a solenoid valve 3, and the solenoid valve 3 is connected to the main control console 1-1 through line 12.

[0072] like Figure 6 , Figure 7 As shown, circular steam holes 2-4 with a diameter of 5 mm are evenly distributed on the DN32 branch pipe 2-2, the angle α between the line connecting the center of the circular steam hole 2-4 and the center of the pipe cross section of the DN32 branch pipe 2-2 and the vertical direction is 45 degrees, and the spacing between adjacent circular steam holes 2-4 is 1m. The circular steam holes 2-4 are cross-arranged on both sides of the DN32 branch pipe 2-2, so that steam can be sprayed in different directions, which is convenient for dry steam to quickly fill the rectified steam maintenance shed, effectively improving the energy utilization efficiency.

[0073] like Figure 1 , Figure 8 As shown, a mobile vibrator 14 is arranged on the long skeletons 4-1 on both sides below the mold platform, and the mobile vibrator 14 includes a vibrator seat 14-5, on which a vibrator engine 14-1 and a vibrator 14-3 are arranged, a buckle 14-2 is connected to the vibrator engine 14-1, and a pulley 14-4 is arranged at the lower end of the vibrator seat 14-5, and the pulley 14-4 is connected to the vibrator engine 14-1. A track 15 is arranged below the mold platform, and the pulley 14-4 is placed on the track 15. The vibrator engine 14-1 is connected to the main control console 1-1.

[0074] like Figure 2 , Fig. 9 As shown, a number of pad iron pieces 9 are provided under each mold platform group to pad the mold platform to a certain height, so that the steam delivery pipeline 2 can pass through the bottom of the mold platform. The pad iron piece 9 is composed of a pad bottom plate 9-1, a pad side plate 9-3, a pad I-beam 9-4, a pad top plate 9-6 and a pad retaining bar 9-5. There are four reserved bolt holes 9-2 on the pad bottom plate 9-1, which are connected to the reserved holes on the ground by bolts to fix the entire iron piece on the ground. Two pad side plates 9-3 are welded and connected on the pad bottom plate 9-1, and the pad I-beam 9-4 is connected between the two pad side plates 9-3 to prevent the pad I-beam 9-4 from sliding laterally. The pad I-beam 9-4 is initially movably connected to the pad side plate 9-3. After the mold platform is leveled, the height between the pad I-beam 9-4 and the pad bottom plate 9-1 is adjusted according to the height difference, and then fixed by welding. The pad I-beam 9-4 is connected to the pad top plate 9-6, and two pad baffles 9-5 are welded on the pad top plate 9-6. The spacing between the two pad baffles 9-5 matches the spacing between the two long frames 4-1 of the mold platform. When the mold platform is placed, the two pad baffles 9-5 can clamp the long frame 4-1 to prevent the mold platform from shifting.

[0075] like Figure 10-Figure 18 As shown, the steam curing shed 8 includes a retractable steaming shed frame 81, a plastic tarpaulin 82 with good thermal insulation and a track wheel mechanism 83. The retractable steaming shed frame 81 is composed of a number of evenly distributed steaming shed frame units 81-1 and folding bracket units 81-2 connected between the steaming shed frame units 81-1. Each steaming shed frame unit 81-1 includes two square steel pipe main frames 81-1-1 and a bent square steel pipe curved beam 81-1-2 connected between the upper ends of the two square steel pipe main frames 81-1-1. Each square steel pipe main frame 81-1-1 is provided with a sliding node 81-1-3 that can slide up and down. The folding bracket unit 81-2 includes a first folding bracket 81-2-1 and a second folding bracket 81-2-2 arranged crosswise, the lower end of the first folding bracket 81-2-1 and the lower end of the second folding bracket 81-2-2 are respectively connected to the sliding nodes 81-1-3 of the two adjacent square steel pipe main frames 81-1-1 by screws, and the upper end of the first folding bracket 81-2-1 and the upper end of the second folding bracket 81-2-2 are respectively fixed to the two adjacent square steel pipe main frames 81-1-1 by screws. The track wheel mechanism 83 includes two steel pipe guide rails 83-1 and a plurality of evenly distributed guide rail wheels 83-2, the lower end of each square steel pipe main frame 81-1-1 is connected to a guide rail wheel 83-2 by screws, and the guide rail wheel 83-2 is placed on the guide rail 83-1 and can move on the guide rail 83-1. The length of the steel pipe guide rail 83-1 can be realized by adding or reducing the steaming shed frame unit 81-1 as needed.

[0076] The plastic tarpaulin 82 includes an inner tarpaulin 82-1 and an outer tarpaulin 82-2. The inner tarpaulin 82-1 is arranged on the inner side of the telescopic steaming shed frame 81. The inner tarpaulin 82-1 is connected to the square steel pipe main frame 81-1-1 and the square steel pipe curved beam 81-1-2 of each steaming shed frame unit 81-1. The outer tarpaulin 82-2 is arranged at both ends of the telescopic steaming shed frame 81. The outer tarpaulin 82-2 is connected to the upper part of the square steel pipe main frame 81-1-1 and the square steel pipe curved beam 81-1-2 of the steaming shed frame unit 81-1 at both ends. The inner tarpaulin 82-1 and the outer tarpaulin 82-2 are overlapped on the square steel pipe curved beam 81-1-2 of the steaming shed frame unit 81-1 at both ends, and the fixing nails fix the inner tarpaulin 82-1 and the outer tarpaulin 82-2 at the same time. The outer tarpaulin 82-2 is movably connected with the inner tarpaulin 82-1 through a nylon buckle. The steam curing shed engine 84 is fixed on the square steel pipe main frame 81-1-1 at the end of the steam curing shed 8 by welding.

[0077] A steam curing production method for precast concrete components, which specifically comprises the following steps:

[0078] 1) The precast concrete component steam curing production line is started and closed through the main control console 1-1, and the parameter data of each curing shed is set. The following parameters are set according to the ambient temperature T:

[0079] In the resting stage, set the temperature value T0=T and the relative humidity value H0=50%, T0 is greater than or equal to 5, and when the ambient temperature T is lower than 5 degrees Celsius, T0=5, and the resting time is 2 hours;

[0080] In the first heating stage, set the temperature value T1 = T0 + 10 and the relative humidity value H1 = 95%, and the duration value is 1 hour;

[0081] The first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour;

[0082] In the second heating stage, the temperature value T2 = T1 + 10 and the relative humidity value H2 = 95% are set, and the duration value is 1 hour;

[0083] The second constant temperature maintains the temperature value T2 and the relative humidity value H2 for 1 hour;

[0084] In the third heating stage, set the temperature value T3 = T2 + 10 and the relative humidity value H3 = 95%, the duration value is 1 hour, 50 < T3 < 60, if the conditions are not met, continue to set the temperature;

[0085] The third constant temperature maintenance temperature value T3 and relative humidity value H3, the duration value is 1 hour;

[0086] In the first cooling stage, set the temperature value T4 = T3-10 and the relative humidity value H4 = 90%, and the duration value is 1 hour;

[0087] The second cooling stage sets the temperature value T5 = T4-10 and the relative humidity value H5 = 90%, and the duration value is 1 hour.

[0088] 2) After the precast concrete components are poured, the main control console 1-1 controls the vibrator engine 14-1 of the mobile vibrator 14 to drive the pulley 14-4 to move along the track 15 to the bottom of the formwork platform, and the buckle 14-2 tightly clamps the mobile vibrator 14 on the formwork platform to fully vibrate the concrete on the formwork platform.

[0089] 3) After the vibration is completed, the main control console 1-1 controls the start of the steam curing shed engine 84. When the steam curing shed 8 is not in use, it is in a retracted state. When the formwork platform needs to be cured, the main control console 1-1 starts the steam curing shed engine 84 to drive the retractable steam curing shed frame 81 to extend, and the guide wheel 83-2 moves along the guide rail 83-1. As the spacing between adjacent steam curing shed frame units gradually increases, the folding bracket rotates around the sliding node on the main frame, pulling the sliding node on the main frame to move up, thereby realizing the unfolding of the present invention. After unfolding, the entire product is in the shape of a tent, so that the precast concrete components that need to be steamed on the mobile formwork platform are in a closed space; the outer tarpaulin and the inner tarpaulin at the end are glued together with nylon buckles to form an airtight closed steam curing space.

[0090] 4) The main control console 1-1 controls the tap water to enter the water storage tank 1-2. When the water level reaches 2 / 3 of the water storage tank 1-2, it automatically enters the pure water machine 1-3 for purification, and the purified water enters the water storage tank 1-4 for storage. The main control console 1-1 controls the start-up of the steam heat source machine 1-6 and the water supply pump 1-5. The water supply pump 1-5 sends the purified pure water in the water storage tank 1-4 to the steam heat source machine 1-6. The steam heat source machine 1-6 converts the pure water into high-dryness steam at a high speed, and finally enters the steam cylinder 1-7.

[0091] 5) Steam is sent from the steam cylinder to the DN32 branch pipe 2-2 and DN20 drain pipe 2-3 under different mold platforms through the delivery pipe 2 and the DN50 main pipe 2-1. The DN50 steam valve 6 and DN20 drain valve 7 of each mold platform group are controlled by a solenoid valve 3. The main control console 1-1 turns on the switch of the corresponding mold platform which needs steam maintenance, and transmits the signal to the corresponding solenoid valve 3 through the line 12 to start the DN50 steam valve 6 and DN20 drain valve 7 of the corresponding mold platform. There are circular steam spray holes on the DN32 branch pipe 2-2, so that steam can be sprayed in different directions, which is convenient for dry steam to quickly fill the steam maintenance shed, effectively improving the energy utilization efficiency.

[0092] 6) Each mold platform group is installed with a temperature sensing probe 10 and a humidity sensing probe 11, which convert the measured temperature and humidity into voltage signals and input them into the temperature and humidity automatic adjustment system 1-8. The temperature and humidity automatic adjustment system 1-8 compares and calculates the input signals with the preset temperature and humidity conversion values, and outputs data signals to the main control console 1-1. The main control console 1-1 controls the switching of the DN50 steam valve 6 and the DN20 steam trap 7.

[0093] After the casting of precast concrete components is completed, the curing stage begins; after initial setting, the temperature rise and constant temperature stage begins, and the first temperature rise, the first constant temperature, the second temperature rise, the second constant temperature, and the third temperature rise are carried out; the third constant temperature; after the temperature rise and constant temperature stage is completed, the cooling stage begins, and the first cooling and the second cooling are carried out.

[0094] Rest, when the temperature and humidity in the steam curing shed in the mold platform do not reach the resting stage temperature value T0 and relative humidity value H0=50% preset in advance by the main control console 1-1, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the transmitted signal, and control the DN50 steam valve 6 to open, thereby gradually raising the temperature to T0 and the humidity to H0 within 2 hours. When the temperature in the steam curing shed rises to T0 and the humidity reaches H0, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1 to stop transmitting steam to the mold platform.

[0095] During the first heating, when the temperature and humidity in the steam curing shed in the mold platform do not reach the temperature value T1 and the relative humidity value H1 preset in advance by the main control console 1-1 during the heating period, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the transmitted signal, and control the DN50 steam valve 6 to open, so as to gradually increase the temperature to T1 and the humidity to H1 within the set time of 1 hour. When the temperature in the steam curing shed rises to T1 and the humidity reaches H1, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back the information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1, and stop transmitting steam to the mold platform, which greatly saves energy.

[0096] After the first temperature rise, the first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour.

[0097] During the second heating, when the temperature and humidity in the steam curing shed in the mold platform do not reach the temperature value T2 and the relative humidity value H2 preset in advance by the main control console 1-1 during the heating period, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the transmitted signal, and control the DN50 steam valve 6 to open, so as to gradually increase the temperature to T2 and the humidity to H2 within the set time of 1 hour. When the temperature in the steam curing shed rises to T2 and the humidity reaches H2, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1 to stop transmitting steam to the mold platform.

[0098] After the second temperature rise, the second constant temperature is maintained at the temperature value T2 and the relative humidity value H2 for 1 hour.

[0099] During the third heating, when the temperature and humidity in the steam curing shed in the mold platform do not reach the temperature value T3 and the relative humidity value H3 preset in advance by the main control console 1-1 during the heating period, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the transmitted signal, and control the DN50 steam valve 6 to open, so as to gradually increase the temperature to T3 and the humidity to H3 within the set time of 1 hour. When the temperature in the steam curing shed rises to T3 and the humidity reaches H3, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1 to stop transmitting steam to the mold platform.

[0100] After the third temperature rise, the third constant temperature is maintained at the temperature value T3 and the relative humidity value H3 for 1 hour.

[0101] After the first cooling, heating and constant temperature stage is completed, it enters the cooling stage. When the temperature and humidity in the steam curing shed in the mold platform decrease too quickly and are lower than the lower limit temperature T4 and relative humidity H4 of the cooling period warning preset in advance by the main control console 1-1, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the received signal, control the DN50 steam valve 6 to open, and heat and moisturize within the set 1 hour. When the temperature in the steam curing shed rises to T4 and the humidity reaches H4, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1 to stop transmitting steam to the mold platform.

[0102] The second cooling stage begins after the first cooling stage is completed. When the temperature and humidity in the steam curing shed in the mold platform decrease too quickly and are lower than the lower warning limit temperature T5 and relative humidity value H5 of the cooling period preset in advance by the main control console 1-1, the temperature sensing probe 10 and the humidity sensing probe 11 will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system 1-8 in the steam heat source machine room 1 through line 2 13. The temperature and humidity automatic adjustment system 1-8 will send a signal to the solenoid valve 3 through the main control console 1-1 according to the transmitted signal, control the DN50 steam valve 6 to open, and heat and moisturize within the set 1 hour. When the temperature in the steam curing shed rises to T5 and the humidity reaches H5, the temperature sensing probe 10 and the humidity sensing probe 11 will feed back information to the temperature and humidity automatic adjustment system 1-8, and control the DN50 steam valve 6 to close through the main control console 1-1 to stop transmitting steam to the mold platform.

[0103] It should be understood that the parts not elaborated in detail in this specification belong to the prior art. The above embodiments are only descriptions of the preferred implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made by ordinary engineers and technicians in this field to the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A precast concrete component steam curing production line, comprising a steam heat source room (1), a mold platform, a steam delivery pipeline (2), and a steam curing shed (8); characterized in that: The steam heat source room (1) is provided with a main control console (1-1), a water storage tank (1-2), a pure water machine (1-3), a water storage tank (1-4), a water supply pump (1-5), a steam heat source machine (1-6), a steam cylinder (1-7) and an automatic temperature and humidity adjustment system (1-8). The main control console (1-1) is respectively connected to the water storage tank (1-2), the steam heat source machine (1-6), the water supply pump (1-5), the automatic temperature and humidity adjustment system (1-8), and the water storage tank (1- 2) connecting a pure water machine (1-3), the pure water machine (1-3) is connected to a water storage tank (1-4), the water storage tank (1-4) is connected to a water supply pump (1-5), the water supply pump (1-5) is connected to a steam heat source machine (1-6), the steam heat source machine (1-6) is connected to a steam cylinder (1-7), the steam cylinder (1-7) is provided with two steam outlets, and the steam delivery pipelines (2) of the two production lines are connected, and the steam is delivered from the steam cylinder (1-7) to different mold tables through the steam delivery pipeline (2); The mold platform comprises a plurality of mold platform groups consisting of large mold platform units (5) and small mold platform units (4), wherein the small mold platform units (4) and the large mold platform units (5) are both formed by welding a mold platform bottom plate (4-5) and a mold platform frame thereon; the mold platform frame is formed by connecting two long frames (4-1), two short frames (4-2), evenly distributed I-beam frames (4-3) and angle steel frames (4-4); the short frames (4-2) are connected between the two ends of the two long frames (4-1); the two long frames (4-2) are connected to the mold platform bottom plate (4-5); and the mold platform frame (4-4) is connected to the mold platform bottom plate (4-5). -1) are connected to an I-beam frame (4-3), and the middle parts of two adjacent I-beam frames (4-3) and the middle parts of the I-beam frame (4-3) and the short frame (4-2) are connected to an angle steel frame (4-4); a temperature sensing probe (10) and a humidity sensing probe (11) are installed on each mold platform group, and the temperature sensing probe (10) and the humidity sensing probe (11) are connected to the temperature and humidity automatic adjustment system (1-8) in the steam heat source room (1) through line 2 (13); The steam delivery pipeline (2) is connected to the DN50 main pipeline (2-1), the DN50 main pipeline (2-1) runs through the entire production line, and a DN32 branch pipeline (2-2) and a DN20 drain pipeline (2-3) are provided under each die set, the DN32 branch pipeline (2-2) is connected to the DN20 drain pipeline (2-3); each DN32 branch pipeline (2-2) is connected to the DN50 main pipeline (2-1); The corners of the DN32 branch pipe (2-2) are connected by a pipe connection elbow, the corners of the DN20 drain pipe (2-3) are connected by a pipe connection elbow, the connection between the DN32 branch pipe (2-2) and the DN20 drain pipe (2-3) is connected by an elbow pipe (2-5), and the horizontal height of the rear half of the elbow pipe (2-5) is lowered; a DN50 steam valve (6) is installed on the DN32 branch pipe (2-2) under each die set, and a DN20 drain valve (7) is installed on the DN20 drain pipe (2-3) under each die set, and the DN50 steam valve (6) and the DN20 drain valve (7) are connected to the pipes on both sides of the two valves through a DN32 flange (6-1) and a DN20 flange (7-1) respectively; the DN50 steam valve (6) and the DN20 drain valve (7) of each die set are connected to a solenoid valve (3), and the solenoid valve (3) is connected to the main control console (1-1) through line 1 (12); The DN32 branch pipe (2-2) is evenly distributed with circular steam injection holes (2-4), the angle α between the center of the circular steam injection hole (2-4) and the center of the pipe cross section of the DN32 branch pipe (2-2) and the vertical direction is 45 degrees, the spacing between adjacent circular steam injection holes (2-4) is 1m, and the circular steam injection holes (2-4) are cross-arranged on both sides of the DN32 branch pipe (2-2); A mobile vibrator (14) is arranged on the long frames (4-1) on both sides below the mold platform. The mobile vibrator (14) comprises a vibrator seat (14-5). A vibrator engine (14-1) and a vibrator (14-3) are arranged on the vibrator seat (14-5). A buckle (14-2) is connected to the vibrator engine (14-1). A pulley (14-4) is arranged at the lower end of the vibrator seat (14-5). The pulley (14-4) is connected to the vibrator engine (14-1). A track (15) is arranged below the mold platform. The pulley (14-4) is placed on the track (15). The vibrator engine (14-1) is connected to the main control console (1-1). A plurality of spacer iron pieces (9) are provided under each die set.

2. A precast concrete component steam curing production line according to claim 1, characterized in that: The mold platform comprises 11 4*12m large mold platform units (5) and 12 4*9m small mold platform units (4), including 10 groups of first mold platform groups each of which is 21m long and consists of a 4*9m small mold platform unit (4) and a 4*12m large mold platform unit (5), and 1 group of second mold platform groups each of which is 18m long and consists of two 4*9m small mold platform units and a third mold platform group consisting of a single 4*12m large mold platform unit (5); the I-beam frame (4-3) is 3.8m long and consists of 15 pieces in total; the long frame (4-1) is made of 28a channel steel, the short frame (4-2) is made of 20a channel steel, the I-beam frame (4-3) is made of 20a I-beam, and the angle steel frame (4-4) is made of 10 / 8 hot-rolled unequal angle steel.

3. The precast concrete component steam curing production line according to claim 1, characterized in that: The DN32 branch pipe (2-2) is 23m long, the DN20 drain pipe (2-3) is 2m long, and the diameter of the circular steam injection hole (2-4) is 5mm.

4. The precast concrete component steam curing production line according to claim 1, characterized in that: The pad iron piece (9) is composed of a pad bottom plate (9-1), a pad side plate (9-3), a pad I-beam (9-4), a pad top plate (9-6) and a pad stop bar (9-5); the pad bottom plate (9-1) is provided with four reserved bolt holes (9-2), which are connected to the reserved holes on the ground by bolts to fix the entire iron piece on the ground; two pad side plates (9-3) are welded to the pad bottom plate (9-1), and the pad I-beam (9-4) is connected between the two pad side plates (9-3) to prevent the pad I-beam (9-4) from sliding laterally. The pad I-beam (9-4) is movably connected to the pad side plate (9-3), and after the mold platform is leveled, the height between the pad I-beam (9-4) and the pad bottom plate (9-1) is adjusted according to the height difference and then fixed by welding; the pad I-beam (9-4) is connected to the pad top plate (9-6), and two pad stop bars (9-5) are welded to the pad top plate (9-6), and the spacing between the two pad stop bars (9-5) is consistent with the spacing size of the two long frames (4-1) of the mold platform. When the mold platform is placed, the two pad stop bars (9-5) can clamp the long frame (4-1).

5. The precast concrete component steam curing production line according to claim 1, characterized in that: The steam curing shed (8) comprises a steam curing shed frame, a plastic tarpaulin (82) and a track wheel mechanism (83), and is characterized in that the steam curing shed frame is a telescopic steam curing shed frame (81), which is composed of a plurality of evenly distributed steam curing shed frame units (81-1) and folding bracket units (81-2) connected between the steam curing shed frame units (81-1), each steam curing shed frame unit (81-1) comprises two square steel pipe main frames (81-1-1) and a bent square steel pipe curved beam (81-1-2) connected between the upper ends of the two square steel pipe main frames (81-1-1), and each square steel pipe main frame (81-1-1) is provided with a sliding node (81-1-3) that can slide up and down; the folding bracket unit (81-2) comprises a first folding bracket (81-1-2) arranged crosswise. The first folding bracket (81-2-1) and the second folding bracket (81-2-2) are connected to the sliding nodes (81-1-3) of the two adjacent square steel tube main frames (81-1-1) by screws, and the upper end of the first folding bracket (81-2-1) and the upper end of the second folding bracket (81-2-2) are fixed to the two adjacent square steel tube main frames (81-1-1) by screws; the track wheel mechanism (83) comprises two steel tube guide rails (83-1) and a plurality of evenly distributed guide rail wheels (83-2), and the lower end of each square steel tube main frame (81-1-1) is connected to a guide rail wheel (83-2) by screws, and the guide rail wheel (83-2) is placed on the guide rail (83-1).

6. A precast concrete component steam curing production line according to claim 5, characterized in that The plastic tarpaulin (82) comprises an inner tarpaulin (82-1) and an outer tarpaulin (82-2). The inner tarpaulin (82-1) is arranged along its entire length on the inner side of the telescopic steaming shed frame (81). The inner tarpaulin (82-1) is connected to the square steel tube main frame (81-1-1) and the square steel tube curved beam (81-1-2) of each steaming shed frame unit (81-1). The outer tarpaulin (82-2) is arranged at both ends of the telescopic steaming shed frame (81). The inner tarpaulin (82-1) and the outer tarpaulin (82-2) are overlapped on the square steel tube curved beams (81-1-2) of the steaming shed frame units (81-1) at both ends, and the fixing nails fix the inner tarpaulin (82-1) and the outer tarpaulin (82-2) at the same time; the outer tarpaulin (82-2) and the inner tarpaulin (82-1) are movably connected through nylon buckles.

7. A steam curing production method for precast concrete components, which specifically comprises the following steps: 1) The precast concrete component steam curing production line is started and closed through the main control console (1-1), and the parameter data of each curing shed is set. The following parameters are set according to the ambient temperature T: In the resting stage, set the temperature value T0=T and the relative humidity value H0=50%, T0 is greater than or equal to 5, when the ambient temperature T is lower than 5 degrees Celsius, T0=5, and the resting time is 2 hours; In the first heating stage, set the temperature value T1 = T0 + 10 and the relative humidity value H1 = 95%, and the duration value is 1 hour; The first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour; In the second heating stage, the temperature value T2 = T1 + 10 and the relative humidity value H2 = 95% are set, and the duration value is 1 hour; The second constant temperature maintains the temperature value T2 and the relative humidity value H2 for 1 hour; In the third heating stage, the temperature value T3 = T2 + 10 and the relative humidity value H3 = 95%, the duration value is 1 hour, 50 < T3 < 60; The third constant temperature maintenance temperature value T3 and relative humidity value H3, the duration value is 1 hour; In the first cooling stage, set the temperature value T4 = T3-10 and the relative humidity value H4 = 90%, and the duration value is 1 hour; In the second cooling stage, the temperature value T5 = T4-10 and the relative humidity value H5 = 90% are set, and the duration value is 1 hour; 2) After the precast concrete component is poured, the main control console (1-1) controls the vibrator engine (14-1) of the mobile vibrator (14) to drive the pulley (14-4) to move along the track (15) to the bottom of the mold platform, and then the buckle (14-2) firmly clamps the mobile vibrator (14) on the mold platform to fully vibrate the concrete on the mold platform; 3) After the vibration is completed, the main control console (1-1) controls the start of the steam curing shed engine (84). When the steam curing shed (8) is not in use, it is in a retracted state. When the formwork platform needs to be cured, the main control console (1-1) starts the steam curing shed engine (84) to drive the retractable steam curing shed frame (81) to extend, and the guide wheel (83-2) moves along the guide rail (83-1). As the spacing between adjacent steam curing shed frame units gradually increases, the folding bracket rotates around the sliding node on the main frame, pulling the sliding node on the main frame to move upward, thereby realizing the unfolding of the present invention. After unfolding, the entire product is in the shape of a tent, so that the precast concrete components that need to be steamed on the mobile formwork platform are present in a closed space; the outer tarpaulin and the inner tarpaulin at the end are glued together with nylon buckles to form an airtight closed steam curing space; 4) The main control console (1-1) controls tap water to enter the water storage tank (1-2). When the water level reaches 2 / 3 of the water storage tank (1-2), the tap water automatically enters the water purifier (1-3) for purification. The purified water enters the water storage tank (1-4) for storage. The main control console (1-1) controls the start-up of the steam heat source machine (1-6) and the water supply pump (1-5). The water supply pump (1-5) sends the purified pure water in the water storage tank (1-4) to the steam heat source machine (1-6). The steam heat source machine (1-6) converts the pure water into high-dryness steam at a high speed, and finally enters the steam cylinder (1-7). 5) Steam is delivered from the steam cylinder to the DN32 branch pipes (2-2) and DN20 drain pipes (2-3) under different mold platforms through the delivery pipe (2) and the DN50 main pipe (2-1); the DN50 steam valve (6) and DN20 drain valve (7) of each mold platform group are controlled by a solenoid valve (3). When a mold platform group needs to be steam maintained, the main control console (1-1) turns on the switch of the corresponding mold platform, and transmits a signal to the corresponding solenoid valve (3) through line 1 (12) to start the DN50 steam valve (6) and DN20 drain valve (7) of the corresponding mold platform. A circular steam spray hole is left on the DN32 branch pipe (2-2) so that steam can be sprayed in different directions, which is convenient for dry steam to quickly fill the steam maintenance shed, effectively improving the utilization efficiency of energy; 6) Each die set is equipped with a temperature sensing probe (10) and a humidity sensing probe (11), which convert the measured temperature and humidity into voltage signals and input them into the temperature and humidity automatic adjustment system (1-8). The temperature and humidity automatic adjustment system (1-8) compares and calculates the input signals with the preset temperature and humidity conversion values, and outputs data signals to the main control console (1-1). The main control console (1-1) controls the opening and closing of the DN50 steam valve (6) and the DN20 steam trap (7); After the precast concrete components are poured, the resting stage begins; after the initial setting, the temperature rise and constant temperature stage begins, which includes the first temperature rise, the first constant temperature, the second temperature rise, the second constant temperature, and the third temperature rise; the third constant temperature; After the heating and constant temperature stage is completed, the cooling stage begins, and the first cooling and the second cooling are performed; Resting, when the temperature and humidity in the steam curing shed do not reach the resting stage temperature value T0 and relative humidity value H0 preset in advance by the main control console (1-1), the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, so as to gradually increase the temperature to T0 and the humidity to H0 within 2 hours. When the temperature in the steam curing shed rises to T0 and the humidity reaches H0, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), so as to stop transmitting steam to the mold platform; During the first heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T1 and the relative humidity value H1 preset in advance by the main control console (1-1) during the heating period, the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, so as to gradually increase the temperature to T1 and the humidity to H1 within the set time of 1 hour. When the temperature in the steam curing shed rises to T1 and the humidity reaches H1, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), so as to stop transmitting steam to the mold platform, thereby greatly saving energy. After the first temperature rise, the first constant temperature maintains the temperature value T1 and the relative humidity value H1 for 1 hour; During the second heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T2 and the relative humidity value H2 preset in advance by the main control console (1-1) during the heating period, the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, so that the temperature is gradually raised to T2 and the humidity is raised to H2 within the set time of 1 hour. When the temperature in the steam curing shed rises to T2 and the humidity reaches H2, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), thereby stopping the transmission of steam to the mold platform; After the second temperature rise, the second constant temperature is maintained at the temperature value T2 and the relative humidity value H2 for 1 hour; During the third heating, when the temperature and humidity in the steam curing shed do not reach the temperature value T3 and the relative humidity value H3 preset in advance by the main control console (1-1) during the heating period, the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, so as to gradually increase the temperature to T3 and the humidity to H3 within the set time of 1 hour. When the temperature in the steam curing shed rises to T3 and the humidity reaches H3, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back the information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), thereby stopping the transmission of steam to the mold platform; After the third temperature rise, the third constant temperature is maintained at the temperature value T3 and the relative humidity value H3 for 1 hour; After the first cooling, heating and constant temperature stage is completed, the cooling stage begins. When the temperature and humidity in the steam curing shed decrease too quickly and are lower than the lower limit temperature T4 and relative humidity value H4 of the cooling period warning preset in advance by the main control console (1-1), the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, and heat and moisturize within the set time of 1 hour. When the temperature in the steam curing shed rises to T4 and the humidity reaches H4, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), and stop transmitting steam to the mold platform; The second cooling phase, after the first cooling phase is completed, enters the second cooling phase. When the temperature and humidity in the steam curing shed decrease too quickly and are lower than the lower limit temperature T5 and relative humidity value H5 preset in advance by the main control console (1-1), the temperature sensing probe (10) and the humidity sensing probe (11) will send a signal, and transmit the signal to the temperature and humidity automatic adjustment system (1-8) in the steam heat source machine room (1) through line 2 (13). The temperature and humidity automatic adjustment system (1-8) will send a signal to the solenoid valve (3) through the main control console (1-1) according to the received signal, and control the DN50 steam valve (6) to open, and heat and moisturize within the set time of 1 hour. When the temperature in the steam curing shed rises to T5 and the humidity reaches H5, the temperature sensing probe (10) and the humidity sensing probe (11) will feed back information to the temperature and humidity automatic adjustment system (1-8), and control the DN50 steam valve (6) to close through the main control console (1-1), and stop transmitting steam to the mold platform.

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