Steam curing equipment for concrete pipe piece and steam curing process of steam curing equipment

Abstract

The invention relates to steam curing equipment for a concrete pipe piece and a steam curing process of the steam curing equipment, and relates to the technical field of concrete prefabricated part preparation. The steam supply mechanism is arranged in the steam curing kiln, and the steam supply mechanism is used for supplying steam into the steam curing kiln; the duct piece mold is placed in the steam curing kiln, and a curing forming groove used for containing the concrete duct piece is formed in the duct piece mold; the temperature measuring mechanism comprises a plurality of temperature sensors, the temperature sensors are detachably arranged on the duct piece mold, and the detection ends of the temperature sensors extend into the curing forming groove; the steam supply mechanism and the plurality of temperature sensors are electrically connected with the control mechanism. The temperature sensor can be repeatedly used under the condition that the temperature detection accuracy of the concrete duct piece is guaranteed, so that the economic cost can be reduced, the production cost can be reduced when the concrete duct piece is produced on a large scale, and meanwhile, the quality of the concrete duct piece is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete prefabricated part preparation, and particularly relates to a steam curing equipment for a concrete segment and a steam curing process thereof. BACKGROUND

[0002] High-temperature steam curing of concrete is a common technique for curing concrete under high-temperature environment by using steam. In the process of producing a concrete segment, the segment mold after pouring concrete is placed in a steam curing kiln, and then steam is introduced into the steam curing kiln, so as to steam cure the concrete in the segment mold.

[0003] In the steam curing process of the concrete segment, in order to ensure the solidification forming quality and speed of the concrete segment, the temperature of the concrete segment needs to be kept stable, which requires real-time monitoring of the temperature of the segment.

[0004] Ideally, the segment concrete is best to slowly harden from inside to outside by relying on its own hydration heat. In order to shorten the curing period, the steam curing process is usually adopted to accelerate the hardening of the concrete by introducing saturated steam into a closed steam curing kiln. However, in general, there are strict regulations for steam curing from pouring to standing to temperature rising, constant temperature and temperature falling. If the steam curing temperature control is unqualified, for example, rapid temperature rising and too high constant temperature will make the evaporation rate of the concrete greater than the water seepage, so as to increase the probability of shrinkage cracking, resulting in the external hardening of the concrete before the internal hardening. This temperature difference between the inside and the outside will cause the segment to produce shrinkage cracks, which seriously affects the mechanical properties and durability of the concrete segment. Generally speaking, the higher the temperature of the concrete and the air, the greater the wind force and the lower the environmental humidity, the more serious the cracking condition.

[0005] At present, a common method is to install a temperature sensor on the inner wall of the steam curing kiln for identifying the temperature of the kiln environment. However, since the temperature sensor detects the temperature of the kiln environment, there is a difference between the temperature of the kiln environment and the temperature of the segment, so the detection result is not accurate.

[0006] Based on the existence of the problem, another existing method is to directly place a wireless temperature sensor in the poured segment, which can accurately measure the internal temperature of the segment, but the wireless temperature sensor will be permanently left in the segment with the solidification and forming of the concrete segment, becoming a one-time consumable, which will increase the cost for large-scale production of the segment. SUMMARY

[0007] The present application provides a steam curing equipment for a concrete segment and a steam curing process thereof, which aims to improve the temperature detection accuracy of the concrete segment and reduce the economic cost, so as to reduce the production cost when large-scale producing the concrete segment.

[0008] In a first aspect, the application provides a steam curing equipment for a concrete segment, which adopts the following technical scheme: a steam curing equipment for a concrete segment, comprising: a steam curing kiln; a steam supply mechanism arranged in the steam curing kiln, the steam supply mechanism being configured to supply steam into the steam curing kiln; a segment mold placed in the steam curing kiln, the segment mold being provided with a solidification forming groove for accommodating a concrete segment; a temperature measuring mechanism comprising a plurality of temperature sensors, the temperature sensors being detachably arranged on the segment mold, and the detection ends of the temperature sensors extending into the solidification forming groove; and a control mechanism, the steam supply mechanism and the plurality of temperature sensors being electrically connected to the control mechanism.

[0009] By adopting the above technical scheme, the temperature measuring mechanism is detachably arranged on the segment mold by the temperature sensors, and the detection ends of the temperature sensors extend into the solidification forming groove. Thus, when the segment mold is loaded with the concrete segment, the detection ends of the temperature sensors can directly contact the concrete segment in the segment mold, so that the temperature sensors can acquire the temperature of the concrete segment in real time, which can ensure the accuracy of temperature acquisition. On this basis, the control mechanism performs closed-loop feedback control on the steam supply mechanism based on the acquired temperature data, which can ensure that the temperature change of the concrete segment conforms to the preset process temperature curve, thereby ensuring the steam curing quality of the concrete segment. Therefore, this design can improve the temperature detection accuracy of the concrete segment, and since the temperature sensors can be reused, the economic cost can be reduced, thereby ensuring that the production cost can be reduced when mass-producing the concrete segment.

[0010] Optionally, the segment mold comprises a supporting middle mold and a forming top mold, the forming top mold comprises a plurality of mold plates, the mold plates are detachably connected to the supporting middle mold, the mold plates are arranged around the supporting middle mold along the circumferential direction of the supporting middle mold, and adjacent two mold plates are detachably connected, the solidification forming groove is formed between the supporting middle mold and the mold plates; the temperature sensors are distributed on the mold plates, and the temperature sensors are detachably connected to the corresponding mold plates.

[0011] By adopting the above technical scheme, based on the structural design of the segment mold, the segment mold itself is detachable, so as to facilitate rapid disassembly of the mold plates for demolding of the concrete segment after steam curing, which also facilitates disassembly of the temperature sensors.

[0012] Optionally, a temperature measuring hole is formed through the mold plate, the temperature measuring holes are arranged one-to-one corresponding to the temperature sensors, and the temperature sensors are inserted into the corresponding temperature measuring holes in a plug-in manner.

[0013] By adopting the technical scheme, the temperature measuring hole is formed in the template, an installation interface is provided for the temperature sensor, the detection end of the temperature sensor can be inserted into the solidification forming groove, and structural guarantee is provided for accurate temperature measurement.

[0014] Optionally, the steam supply mechanism comprises a steam source, a main pipe, a control pipe and a plurality of steam branch pipes, the steam source, the main pipe, the control pipe and the plurality of steam branch pipes are sequentially communicated, a plurality of steam holes are sequentially formed in the steam branch pipes along the length direction of the steam branch pipes, and the plurality of steam branch pipes are located in the steam curing kiln; the control pipe is provided with a first electric control valve, and the control mechanism is electrically connected with the first electric control valve.

[0015] By adopting the technical scheme, the steam supply mechanism is designed by cooperation of the steam source, the main pipe, the control pipe and the plurality of steam branch pipes, a complete steam conveying path is constructed, and it is ensured that steam can be conveyed to the steam curing kiln. On this basis, since the control pipe is provided with the first electric control valve, and the first electric control valve is electrically connected with the control mechanism, the control mechanism can control the start and stop of the first electric control valve through instructions, and automatic control of steam entering the steam supply mechanism can be realized.

[0016] Optionally, one end of the steam branch pipe is communicated with the control pipe, and the other end is inclined downward.

[0017] By adopting the technical scheme, the end of the steam branch pipe is inclined downward, gravity is utilized, the condensed water generated in the steam branch pipe flows to the end, and therefore, the condensed water can be prevented from accumulating in the pipeline to affect the flow and temperature of steam, the water hammer phenomenon is avoided, or liquid water is directly sprayed to the concrete surface to cause adverse effects on the quality of steam curing, and the purity and stability of steam supply are ensured.

[0018] Optionally, the lower end of the steam branch pipe is closed, and a drainage hole is formed in the closed end of the steam branch pipe; the steam hole is located on the upper side of the steam branch pipe, and the drainage hole is located on the lower side of the steam branch pipe.

[0019] By adopting the technical scheme, the drainage hole is formed in the bottom of the closed end of the steam branch pipe, and the condensed water collected at the lower end of the steam branch pipe can be discharged in time.

[0020] Optionally, a track groove is formed in the bottom wall of the steam curing kiln, the length direction of the track groove is arranged along the length direction of the steam curing kiln, and the track groove is located directly below the segment mold; a conveying sub-car is arranged on the groove bottom of the track groove, a jacking assembly is arranged on the conveying sub-car, and the conveying sub-car can move on the groove bottom of the track groove along the length direction of the track groove.

[0021] By adopting the technical scheme, the automatic conveying, jacking and placing of the segment mold are realized by arranging the conveying sub-trolley and the jacking assembly in the steam curing kiln, so that the conveying efficiency of the segment mold is improved.

[0022] Optionally, the groove bottom of the track groove is further provided with two support columns, the two support columns are arranged at intervals along the width direction of the track groove, the upper end of the support column protrudes from the bottom wall of the steam curing kiln, the segment mold is placed on the two support columns, and the conveying sub-trolley and the jacking assembly are located between the two support columns.

[0023] By adopting the technical scheme, the segment mold is lifted by the support column, which provides stable support for the heavy segment mold and makes the segment mold separate from the bottom wall of the steam curing kiln, so that the steam can flow below the segment mold, the more comprehensive wrapped heating of the concrete segment is realized, and the uniformity of heat transfer is improved.

[0024] In a second aspect, the steam curing process for the concrete segment provided by the present application adopts the following technical scheme: A steam curing process for a concrete segment, which adopts the steam curing equipment for the concrete segment, and includes the following steps: S1, installing a temperature sensor on the segment mold, and making the detection end of the temperature sensor contact the concrete segment in the segment mold; S2, conveying the segment mold into the steam curing kiln, and closing the steam curing kiln; S3, starting the steam supply mechanism to convey steam into the steam curing kiln, performing steam curing, and the temperature sensor detects the temperature of the concrete segment in real time; S4, transmitting the real-time detected temperature data to the control mechanism, the control mechanism compares the temperature data with the preset process temperature curve, and controls the opening or stop of the steam supply mechanism according to the comparison result, so that the temperature change of the concrete segment conforms to the preset process temperature curve; S5, the steam curing is completed, the steam curing kiln is opened, and the segment mold with the concrete segment is taken out.

[0025] By adopting the technical scheme, a real-time feedback closed-loop control process based on the temperature of the concrete segment is established by the above process steps, the control mechanism adjusts the start and stop of the steam supply mechanism according to the real-time temperature of the concrete segment, so that the temperature change of the concrete segment in the steam curing process conforms to the preset process curve, and the product qualification rate, mechanical properties and long-term durability of the concrete segment are improved.

[0026] Optionally, step S4 further comprises the following steps: S41, establishing a preset process temperature curve according to the proportioning of the concrete used by the concrete segment and the curing requirements; S42, collecting the temperature data of the concrete segment in real time through a plurality of temperature sensors and sending the temperature data to the control mechanism; S43, comparing the real-time temperature received by the control mechanism with the target value at the current time on the preset process temperature curve; S44, controlling the opening or closing of the steam supply mechanism according to the comparison result of step S43; and S45, repeating steps S42-S44 until the steam curing is completed.

[0027] By adopting the above technical solution, through the design of the above steps, through the design of establishing a curve, transmitting data, comparing data and performing control steps, the real-time feedback regulation function based on the temperature of the concrete segment itself is realized.

[0028] In summary, the present application has at least one of the following beneficial technical effects: 1. Through the design of the temperature measuring mechanism, the temperature sensor can be reused while ensuring the accuracy of the temperature detection of the concrete segment, which can reduce the economic cost, thereby ensuring that the production cost can be reduced when mass-producing the concrete segment.

[0029] 2. Through the cooperative design of the control mechanism, the temperature measuring mechanism and the steam supply mechanism, the temperature data of the concrete segment can be obtained in real time, and the steam supply mechanism is controlled in a closed loop feedback manner, so that the temperature change of the concrete segment can be ensured to comply with the preset process temperature curve, thereby improving the product qualification rate, mechanical properties and long-term durability of the concrete segment.

[0030] 3. Through the design of the steam supply mechanism, the purity and stability of the steam supply are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a cross-sectional structure schematic diagram of the steam curing equipment of embodiment 1 of the present application.

[0032] Figure 2 is a control block diagram of the steam curing equipment of embodiment 1 of the present application.

[0033] Figure 3 is a front view schematic diagram of the steam curing equipment of embodiment 1 of the present application.

[0034] Figure 4 is a whole structure schematic diagram of the steam curing equipment of embodiment 1 of the present application.

[0035] Figure 5 is a whole structure schematic diagram of the segment mold of embodiment 1 of the present application.

[0036] Figure 6is a schematic diagram of the overall structure of the steam sub-pipe of Embodiment 1 of the present application.

[0037] Figure 7 is a schematic diagram of the cross-sectional structure of the steam curing equipment of Embodiment 2 of the present application.

[0038] In the figure, 1, steam curing kiln; 11, track groove; 12, conveying track; 13, support column; 2, steam supply mechanism; 21, steam source; 22, main pipe; 23, control pipe; 231, first electric control valve; 232, first manual valve; 24, steam sub-pipe; 241, steam hole; 242, drainage hole; 3, pipe piece mold; 31, support bottom plate; 32, support middle mold; 33, forming top mold; 331, mold plate; 34, curing forming groove; 4, control mechanism; 41, upper computer; 42, controller; 5, temperature measuring mechanism; 51, temperature sensor; 6, mother-son car conveying mechanism; 61, conveying son car; 62, conveying mother car; 63, connecting track; 7, temperature equalizing and humidifying mechanism; 71, fan. DETAILED DESCRIPTION

[0039] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 7 The present application will be described in further detail.

[0040] Embodiment 1: A steam curing equipment for concrete pipe pieces, referring to Figure 1 and Figure 2 , comprising a steam curing kiln 1, a steam supply mechanism 2, a pipe piece mold 3 and a control mechanism 4, the steam supply mechanism 2 and the pipe piece mold 3 are both arranged in the steam curing kiln 1, a temperature measuring mechanism 5 is detachably arranged on the side wall of the pipe piece mold 3, the detection end of the temperature measuring mechanism 5 extends into the pipe piece mold 3, and the steam supply mechanism 2 and the temperature measuring mechanism 5 are both electrically connected with the control mechanism 4.

[0041] Under such design, in the process of steam curing of the pipe piece, the temperature measuring mechanism 5 is detachably arranged on the pipe piece mold 3, so that its detection end can directly contact the concrete pipe piece during steam curing. In this way, the real temperature of the pipe piece itself can be monitored in real time and accurately, solving the problem of inaccurate data caused by indirect temperature measurement in the background technology. The real-time temperature data acquired by the temperature measuring mechanism 5 is transmitted to the control mechanism 4, the control mechanism 4 compares the data with the preset process temperature curve, and carries out closed-loop feedback control on the steam supply mechanism 2, so as to ensure that the temperature change of the concrete pipe piece strictly follows the preset curve, and to ensure the final curing and forming quality of the pipe piece. More importantly, when the curing is completed and the pipe piece is taken out, the temperature measuring mechanism 5 installed on the pipe piece mold 3 will be recycled with the pipe piece mold 3, realizing repeated use, taking into account the detection accuracy and economy, and solving the problem of cost increase caused by the sensor as a one-time consumable.

[0042] Referring to Figure 3And Figure 4 The length direction of the steam curing kiln 1 is arranged horizontally, one end of the length direction of the steam curing kiln 1 is open, and the open end of the steam curing kiln 1 is provided with a closing door, and the closing door is a motor-driven roller shutter door. The opening of the steam curing kiln 1 ensures that the segment mold 3 can be transported into the steam curing kiln 1, thereby realizing the steam curing of the concrete segment.

[0043] Referring to Figure 3 And Figure 4 The inner bottom of the steam curing kiln 1 is provided with a track groove 11, the length direction of the track groove 11 is arranged along the length direction of the steam curing kiln 1, and the track groove 11 penetrates the steam curing kiln 1 along the length direction of itself towards one side of the open end of the steam curing kiln 1. The segment mold 3 is placed on the inner bottom wall of the steam curing kiln 1, and the track groove 11 is located directly below the segment mold 3. The steam curing kiln 1 is also provided with a conveying subcarriage 61, which is located in the track groove 11 and directly below the segment mold 3, and the conveying subcarriage 61 is also provided with a jacking assembly.

[0044] Under the cooperation of the track groove 11, the conveying subcarriage 61 and the jacking assembly, the conveying subcarriage 61 lifts the segment mold 3 through the jacking assembly, so that the segment mold 3 is located in the steam curing kiln 1, and then the conveying subcarriage 61 transports the segment mold 3 along the track groove 11 to a predetermined position in the steam curing kiln 1, and then the jacking assembly lowers the segment mold 3, so that the segment mold 3 is placed on the bottom wall of the steam curing kiln 1. Therefore, such a design facilitates the automatic transportation of the segment mold 3. In this embodiment, the conveying subcarriage 61 can be a track guide vehicle or a track shuttle vehicle, and the jacking assembly can be a hydraulic lifting platform or a scissor-type lifting platform.

[0045] Referring to Figure 3 And Figure 4 In this embodiment, both ends of the steam curing kiln 1 along the length direction of itself are open, and closing doors are arranged at both ends of the steam curing kiln 1 along the length direction. On this basis, the track groove 11 penetrates both ends of the steam curing kiln 1 along the length direction of the steam curing kiln 1. Based on the structural design of the steam curing kiln 1, the steam curing kiln 1 forms a through design, so that both ends of the steam curing kiln 1 can realize the input and output of the segment mold 3, which can improve the transportation efficiency of the segment mold 3, and further improve the steam curing efficiency of the segment mold 3.

[0046] Referring to Figure 3 And Figure 4 In this embodiment, a conveying track 12 is arranged in the track groove 11, the conveying track 12 is located at the groove bottom of the track groove 11, the length direction of the conveying track 12 is arranged along the length direction of the steam curing kiln 1, and the conveying subcarriage 61 is slidingly arranged on the conveying track 12. The arrangement of the conveying track 12 can ensure that the conveying subcarriage 61 can still travel smoothly under heavy load.

[0047] Referring to Figure 3 AndFigure 4 In the embodiment, two support columns 13 are poured at the groove bottom of the track groove 11, the length direction of the two support columns 13 is arranged along the length direction of the steam curing kiln 1, and the two support columns 13 are arranged in parallel and spaced apart along the width direction of the steam curing kiln 1. The side away from each other of the two support columns 13 is connected with the corresponding inner side wall of the track groove 11, and the conveying track 12, the conveying sub-trolley 61 and the jacking assembly are all located between the two support columns 13. The upper end of the support column 13 extends to the inner bottom wall of the steam curing kiln 1, and the duct piece mold 3 is placed on the two support columns 13.

[0048] Such design, on the one hand, the two support columns 13 provide stable and reliable support for the heavy-duty duct piece mold 3, ensuring that the position of the duct piece mold 3 is fixed during the steam curing process. On the other hand, the two support columns 13 raise the duct piece mold 3, so that the duct piece mold 3 is separated from the inner bottom wall of the steam curing kiln 1, thereby facilitating the circulation of steam below the duct piece mold 3, thereby achieving more comprehensive wrap-around heating of the concrete duct piece and improving the uniformity of heat transfer.

[0049] Referring to Figure 3 and Figure 4 , the steam curing equipment further comprises a conveying mother trolley 62, which is located outside the opening end of the steam curing kiln 1, and the upper side of the conveying mother trolley 62 is flush with the groove bottom of the track groove 11. The conveying mother trolley 62 is provided with a connecting track 63, the length direction of the connecting track 63 is arranged along the length direction of the conveying track 12, and the conveying track 12 is arranged opposite to the connecting track 63 along the length direction thereof.

[0050] The conveying mother trolley 62 and the conveying sub-trolley 61 constitute a sub-mother trolley conveying mechanism 6. The working process of the sub-mother trolley conveying mechanism 6 is that the conveying mother trolley 62 performs long-distance or cross-regional transfer outside the steam curing kiln 1, and after reaching the opening end of the designated steam curing kiln 1, the conveying sub-trolley 61 completes the short-distance conveying into or out of the kiln. Such design improves the flexibility and automation of the duct piece mold 3 conveying, and the sub-mother trolley conveying mechanism 6 composed of the conveying mother trolley 62 and the conveying sub-trolley 61 can serve multiple parallel steam curing kilns 1 at the same time.

[0051] Referring to Figure 5 , the duct piece mold 3 comprises a support bottom plate 31, a support middle mold 32 and a forming top mold 33. The support bottom plate 31 is horizontally arranged, the forming top mold 33 is located above the support bottom plate 31, and the support middle mold 32 is located between the support bottom plate 31 and the forming top mold 33. The support bottom plate 31 and the forming top mold 33 are both fixedly connected with the support middle mold 32.

[0052] Referring to Figure 5The forming top die 33 includes four die plates 331, which are arranged around the supporting middle die 32 in the circumferential direction of the supporting middle die 32, and two adjacent die plates 331 in the circumferential direction of the supporting middle die 32 are detachably connected. The four die plates 331 form a rectangular space in which the supporting middle die 32 is located, and the four die plates 331 are detachably connected to the corresponding side walls of the supporting middle die 32, thereby forming a solidification forming groove 34 between the four die plates 331 and the supporting middle die 32.

[0053] The solidification forming groove 34 formed by the cooperation of the supporting bottom plate 31, the supporting middle die 32 and the forming top die 33 can realize the pouring and forming of the concrete segment. Since the die plates 331 are designed to be detachably connected, the die plates 331 can be quickly detached after the steam curing of the concrete segment is completed. Based on this design, on the one hand, the segment mold 3 is easy to disassemble and reuse. On the other hand, the solidified concrete segment is easy to demold and take out. In this embodiment, the adjacent two die plates 331 and the die plates and the supporting middle die 32 are connected by bolts.

[0054] Referring to Figure 1 and Figure 5 The temperature measuring mechanism 5 includes a plurality of temperature sensors 51 distributed on the plurality of die plates 331. The plurality of die plates 331 are provided with temperature measuring holes, and the temperature sensors 51 are one-to-one correspondingly arranged with the temperature measuring holes. The temperature sensors 51 are screw-connected or plug-connected with the corresponding temperature measuring holes, and the detection ends of the temperature sensors 51 extend into the solidification forming groove 34.

[0055] Through the cooperation of the plurality of temperature sensors 51 and the die plates 331, after the temperature sensors 51 are installed on the segment mold 3, the detection ends of the temperature sensors 51 can pass through the segment mold 3, so that the detection ends of the temperature sensors 51 can directly contact the concrete segment in the segment mold 3.

[0056] On the one hand, the temperature measuring mechanism 5 can measure the real temperature of the concrete during the hydration reaction in real time, overcoming the temperature difference and hysteresis problems caused by measuring the air temperature in the steam curing kiln 1 in the prior art. On the other hand, since the temperature sensors 51 are installed on the detachable segment mold 3, when the segment mold 3 is disassembled, the temperature sensors 51 on the segment mold 3 will be recycled together with the segment mold 3, which can solve the economic problem of increasing the cost of consumables to ensure the temperature measurement accuracy in the prior art.

[0057] Referring to Figure 5 In this embodiment, the temperature sensor 51 is a wireless temperature sensor 51, and the wireless temperature sensor 51 is connected to the control mechanism 4 through wireless communication.

[0058] With reference to Figure 1 and Figure 4 The steam supply mechanism 2 comprises a steam source 21, a main pipe 22, a control pipe 23 and a plurality of steam sub-pipes 24, which are sequentially communicated, and the plurality of steam sub-pipes 24 are communicated with the control pipe 23. The steam source 21 and the main pipe 22 are located outside the steam curing kiln 1, the plurality of steam sub-pipes 24 are located inside the steam curing kiln 1, one end of the control pipe 23 is located outside the steam curing kiln 1 and the other end extends into the steam curing kiln 1, the control pipe 23 is provided with a first electric control valve 231 and a first manual valve 232, and the first electric control valve 231 is electrically connected with the control mechanism 4.

[0059] With reference to Figure 4 and Figure 6 The steam sub-pipe 24 is arranged on the bottom wall of the steam curing kiln 1, the length direction of the steam sub-pipe 24 is arranged along the length direction of the steam curing kiln 1, and a plurality of steam holes 241 are sequentially arranged on the steam sub-pipe 24 along the length direction of the steam sub-pipe 24, and the steam holes 241 are located on the upper side of the steam sub-pipe 24.

[0060] Under the structure design of the steam supply mechanism 2, the steam generated by the steam source 21 sequentially flows through the main pipe 22 and the control pipe 23, and finally flows into the plurality of steam sub-pipes 24. At this time, the steam is uniformly sprayed through the plurality of steam holes 241 on the steam sub-pipe 24, so that the steam is uniformly distributed into the steam curing kiln 1.

[0061] In this process, the first electric control valve 231 receives the instructions of the control mechanism 4 in real time. When the control mechanism 4 determines that the temperature needs to be raised, the first electric control valve 231 is opened to allow high-temperature steam to enter the steam curing kiln 1. This can continuously and uniformly release heat and humidity into the steam curing kiln 1, creating a stable environment for the solidification and molding of the concrete segments. In this embodiment, the steam source 21 can use an industrial boiler or a steam generator, the first manual valve 232 can use a gate valve or a ball valve, and the first electric control valve 231 can use an electromagnetic valve or an electric ball valve.

[0062] With reference to Figure 6 In this embodiment, one end of the steam sub-pipe 24 is communicated with the control pipe 23, the other end is arranged to extend downwardly and obliquely, and the end of the steam sub-pipe 24 away from the control pipe 23 is closed. The closed end of the steam sub-pipe 24 is provided with a drain hole 242, and the drain hole 242 is located on the lower side of the closed end of the steam sub-pipe 24.

[0063] The steam sub-pipe 24 is arranged obliquely and the closed end is provided with the drain hole 242 on the lower side, which can automatically collect and discharge the condensed water generated in the conveying process due to the temperature drop of the steam by gravity, thereby preventing the condensed water from accumulating in the pipeline to affect the flow and temperature of the steam, avoiding the water hammer phenomenon or directly spraying liquid water to the concrete surface to adversely affect the curing quality, and ensuring the purity and stability of the steam supply.

[0064] Referring to Figure 2 , the control mechanism 4 includes a host computer 41 and a controller 42, the host computer 41 adopts a computer, the controller 42 adopts a programmable logic controller 42 (PLC), the wireless temperature sensor 51 and the first electric control valve 231 are electrically connected or communicatively connected with the controller 42, and the host computer 41 is communicatively connected with the controller 42.

[0065] The control mechanism 4 receives signals from all the temperature sensors 51 through the controller 42 and issues instructions to the first electric control valve 231 according to a preset program, so as to realize automatic closed-loop control of temperature regulation. Since the concrete segment needs to go through three links of temperature rising, constant temperature and temperature falling in the steam curing process, the concrete segment has a corresponding temperature change curve in the steam curing process, and the host computer 41 is used to establish a preset process temperature curve. The host computer 41 downloads a control model of the preset process temperature curve into the controller 42, and the controller 42 regulates and controls the temperature in the steam curing kiln 1 based on the control model of the preset process temperature curve, so that the temperature change curve of the concrete segment in the actual state can conform to the preset process temperature curve as much as possible, thereby ensuring the steam curing quality of the concrete segment.

[0066] The implementation principle of the embodiment is as follows: when steam curing of the concrete segment is performed, first, a plurality of temperature sensors 51 are installed on the segment mold 3 loaded with the concrete segment, and the detection ends of the temperature sensors 51 are in contact with the concrete segment. Second, the conveying sub-car 61 and the segment mold 3 are conveyed to the opening end of the corresponding steam curing kiln 1 by the conveying mother car 62, and then the conveying sub-car 61 conveys the segment mold 3 into the corresponding steam curing kiln 1. Then, the conveying sub-car 61 moves to the conveying mother car 62, and the closure door is closed. After that, the control mechanism 4 controls the steam supply mechanism 2 to supply steam into the steam curing kiln 1, and starts the steam curing. Finally, after the steam curing is completed, the closure door is opened, the conveying sub-car 61 enters the steam curing kiln 1 to take out the segment mold 3 and moves to the conveying mother car 62.

[0067] In the process of steam curing, the control mechanism 4 starts the preset steam curing process program, controls the first electric control valve 231 to make the steam supply mechanism 2 supply steam into the steam curing kiln 1, and realizes steam curing of the concrete segment. In this process, the temperature sensor 51 detects the temperature of the concrete segment in real time, and sends the temperature data to the control mechanism 4 in a wireless manner. The control mechanism 4 compares the real-time temperature with the target temperature value in the preset process temperature defect, and adjusts the opening and closing state of the first electric control valve 231 in real time according to the comparison result, so as to accurately control the supply amount of steam and further control the temperature in the steam curing kiln 1.

[0068] The embodiment also discloses a steam curing process for a concrete segment, including the following steps: S1, install temperature sensors 51 to the segment mold 3, and make the detection end of the temperature sensor 51 in contact with the concrete segment in the segment mold 3.

[0069] Specifically, the concrete is poured in the segment mold 3 to form the concrete segment. After that, several temperature sensors 51 are inserted into the corresponding temperature measurement holes on the segment mold 3, so that the detection end of each temperature sensor 51 can extend into the segment mold 3, and at this time the detection end of the temperature sensor 51 can be in direct contact with the concrete segment. Such a design can effectively improve the accuracy of temperature data acquisition, and the temperature sensor 51 can be reused.

[0070] S2, transport the segment mold 3 loaded with the concrete segment to the steam curing kiln 1, and close the steam curing kiln 1.

[0071] Specifically, the following steps are included: The segment mold 3 loaded with the concrete segment is placed on the transport subcarriage 61, and then the transport mother carriage 62 transports the transport subcarriage 61 and the segment mold 3 to the open end of the steam curing kiln 1, and aligns the connecting rail 63 on the transport mother carriage 62 with the transport rail 12 in the steam curing kiln 1.

[0072] The jacking assembly on the transport subcarriage 61 jacks up the segment mold 3, and then the transport subcarriage 61 moves along the connecting rail 63 and the transport rail 12 into the rail groove 11 in the steam curing kiln 1.

[0073] After the transport subcarriage 61 moves to the predetermined position, the jacking assembly is lowered so that the segment mold 3 is stably placed on the two support columns 13, and the jacking assembly is separated from the segment mold 3.

[0074] The transport subcarriage 61 moves along the connecting rail 63 and the transport rail 12 to the transport mother carriage 62 again, and the transport mother carriage 62 carries the transport subcarriage 61 and moves away from the steam curing kiln 1.

[0075] Repeat the above steps until the steam curing kiln 1 is filled with segment molds 3 loaded with concrete segments.

[0076] Close the closing door of the open end of the steam curing kiln 1 to close the open end of the steam curing kiln 1.

[0077] S3, start the steam supply mechanism 2 to deliver steam into the steam curing kiln 1, perform steam curing, and the temperature sensor 51 detects the temperature of the concrete segment in real time.

[0078] Specifically, the control mechanism 4 opens the first electric control valve 231, the steam source 21 generates steam, and the steam flows through the main pipe 22, the control pipe 23 and the plurality of steam branch pipes 24 in sequence, and is finally uniformly sprayed from the plurality of steam holes 241 on the steam branch pipes 24, so that the steam is uniformly distributed into the steam curing kiln 1. At the same time, the plurality of temperature sensors 51 are activated to start collecting the real-time temperature of the concrete segment.

[0079] S4, transmit the real-time detected temperature data to the control mechanism 4, the control mechanism 4 compares the temperature data with the preset process temperature curve, and controls the opening or stop of the steam supply mechanism 2 according to the comparison result, so that the temperature change of the concrete segment conforms to the preset process temperature curve.

[0080] Specifically, the following steps are included: S41, establish a preset process temperature curve.

[0081] According to the proportioning and curing requirements of the concrete used by the concrete segment, a preset process temperature curve is established in the upper computer 41, and a control model of the preset process temperature curve is downloaded into the controller 42.

[0082] Specifically, since the concrete segment needs to go through the three stages of temperature rise, constant temperature and temperature drop during the steam curing process, the preset process temperature curve is established according to the time, target temperature and temperature control rate of each stage of the three stages of temperature rise, constant temperature and temperature drop of the concrete segment, so that the preset process temperature curve conforms to the ideal temperature change curve of the concrete segment during the steam curing process.

[0083] S42, real-time transmission of temperature data.

[0084] The temperature data of the concrete segment is collected in real time and continuously by the plurality of temperature sensors 51, and the temperature data is sent to the controller 42.

[0085] Specifically, the controller 42 is electrically connected with a wireless data collector, the temperature sensor 51 sends data to the wireless data collector in a wireless manner, the wireless data collector transmits the data to the controller 42, and the controller 42 further feeds back the data to the upper computer for monitoring and recording.

[0086] S43, compare the temperature data.

[0087] The controller 42 compares the received real-time temperature with the target value at the current time on the preset process temperature curve.

[0088] Specifically, the controller 42 realizes the comparison of the temperature data, and the upper computer 41 is used to record the comparison and establish the corresponding real-time temperature curve. During this process, the controller 42 compares the temperature data at a preset frequency, for example, once every 1 second or once every 5 seconds.

[0089] S44, performing closed-loop feedback control.

[0090] The opening or closing of the steam supply mechanism 2 is controlled according to the comparison result of step S43.

[0091] Specifically, when the comparison result is that the real-time temperature is less than the target value, the controller 42 controls the first electric control valve 231 to remain in the open state, so that the steam supply mechanism 2 continues to supply steam; when the comparison result is that the real-time temperature is greater than or equal to the target value, the controller 42 controls the first electric control valve 231 to close, so that the steam supply mechanism 2 stops supplying steam.

[0092] S45, repeating the above steps S42-S44 until the steam curing is completed.

[0093] Specifically, through such a repeated automatic adjustment, the full-stage accurate control of the temperature of the concrete segment is finally realized, thereby improving the steam curing quality of the concrete segment.

[0094] S5, the steam curing is completed, the steam curing kiln 1 is opened, and the segment mold 3 loaded with the concrete segment is taken out.

[0095] Specifically, the following steps are included: After the steam curing is completed, the closing door of the opening end of the steam curing kiln 1 is opened, and the opening end of the steam curing kiln 1 is opened.

[0096] The transport mother vehicle 62 carries the transport sub-vehicle 61 and moves to the opening end of the steam curing kiln 1, so that the connecting track 63 is aligned with the transport pipeline.

[0097] The transport sub-vehicle 61 moves along the connecting track 63 and the transport track 12 into the track groove 11 in the steam curing kiln 1, and moves to directly below the segment mold 3.

[0098] After the transport sub-vehicle 61 moves to directly below the segment mold 3, the jacking assembly is raised to jack up the segment mold 3, so that the segment mold 3 is separated from the support column 13.

[0099] The transport sub-vehicle 61 carrying the segment mold 3 moves along the connecting pipeline and the transport track 12 to the transport mother vehicle 62, and the transport mother vehicle 62 carrying the transport sub-vehicle 61 and the segment mold 3 moves away from the steam curing kiln 1.

[0100] The above steps are repeated until all the segment molds 3 in the steam curing kiln 1 are transported out of the steam curing kiln 1.

[0101] The implementation principle of the embodiment of the present application is that the temperature measuring mechanism 5 is installed on the segment mold 3 to realize direct and real-time monitoring of the real temperature of the concrete segment. Based on the temperature measuring mechanism 5, a temperature closed-loop feedback control system is established in the steam curing kiln 1. The temperature closed-loop feedback control system can ensure that the steam curing process strictly follows the optimal process temperature curve by feedback adjusting the temperature variable in the steam curing process, thereby effectively avoiding temperature stress cracks caused by excessive temperature difference between the inside and the outside, and improving the finished product qualification rate, mechanical properties and long-term durability of the concrete segment while ensuring the steam curing efficiency.

[0102] Embodiment 2: A steam curing equipment for a concrete segment, referring to Figure 7 The difference between the present embodiment and embodiment 1 is that the steam curing equipment further comprises a temperature and humidity equalizing mechanism 7, the temperature and humidity equalizing mechanism 7 comprises a plurality of fans 71, the fans 71 are located in the steam curing kiln 1, and the plurality of fans 71 are installed on the inner top wall of the steam curing kiln 1, and the fans 71 are arranged in the vertical direction.

[0103] The temperature and humidity equalizing mechanism 7 creates a forced air convection in the steam curing kiln 1 by the working of the fans 71, thereby breaking the temperature and humidity stratification phenomenon of upper hot and lower cold, upper wet and lower dry in the steam curing kiln 1 caused by the natural upward floating of the hot steam, and actively and uniformly delivering heat and humidity to every corner of the steam curing kiln 1, thereby creating a uniform temperature and humidity field in the steam curing kiln 1. This ensures that each part of the concrete segment can obtain consistent curing conditions, so that the temperature and humidity data measured at a single point can truly represent the overall condition.

[0104] The implementation principle of the embodiment of the present application is that the fans 71 in the steam curing process are continuously and slowly operated to ensure that the heat brought by the steam can be rapidly and uniformly diffused to all parts of the steam curing kiln 1, thereby ensuring that the temperature and humidity are uniformly distributed in the steam curing kiln 1.

[0105] The embodiments of the present specific embodiment are the preferred embodiments of the present application, but do not limit the protection scope of the present application. The same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape, principle of the present application should be covered by the protection scope of the present application.

Claims

1. A steam curing apparatus for a concrete segment, characterized by, include: Steam curing kiln (1); A steam supply mechanism (2) is provided inside the steam curing kiln (1), and the steam supply mechanism (2) is used to supply steam into the steam curing kiln (1); The segment mold (3) is placed inside the curing kiln (1), and the segment mold (3) is provided with a curing and molding groove (34) for accommodating concrete segments. The temperature measuring mechanism (5) includes several temperature sensors (51), which are detachably mounted on the tube mold (3) and the detection end of the temperature sensor (51) extends into the curing molding tank (34). The control mechanism (4), the steam supply mechanism (2), and several temperature sensors (51) are all electrically connected to the control mechanism (4).

2. A steam curing apparatus for concrete segments as defined in claim 1, wherein The segment mold (3) includes a supporting middle mold (32) and a forming top mold (33). The forming top mold (33) includes a plurality of templates (331). The plurality of templates (331) are detachably connected to the supporting middle mold (32). The plurality of templates (331) are arranged around the supporting middle mold (32) along the circumference of the supporting middle mold (32), and two adjacent templates (331) are detachably connected. The solidification molding groove (34) is formed between the supporting middle mold (32) and the plurality of templates (331). A plurality of temperature sensors (51) are distributed on a plurality of templates (331), and the temperature sensors (51) are detachably connected to the corresponding templates (331).

3. A steam curing apparatus for concrete segments as defined in claim 2, wherein Temperature measuring holes are provided through the template (331), and the temperature measuring holes are set one-to-one with the temperature sensors (51). The temperature sensors (51) are plugged into the corresponding temperature measuring holes.

4. A steam curing apparatus for concrete segments as defined in claim 1, wherein The steam supply mechanism (2) includes a steam source (21), a main pipe (22), a control pipe (23), and several steam branch pipes (24). The steam source (21), the main pipe (22), the control pipe (23), and several steam branch pipes (24) are connected in sequence. Several steam holes (241) are opened in sequence along the length of the steam branch pipes (24). Several steam branch pipes (24) are located inside the steam curing kiln (1). The control tube (23) is equipped with a first electrically controlled valve (231), and the control mechanism (4) is electrically connected to the first electrically controlled valve (231).

5. A steam curing apparatus for concrete segments as defined in claim 4, wherein One end of the steam distribution pipe (24) is connected to the control pipe (23), and the other end is inclined downward.

6. A steam curing apparatus for concrete segments as defined in claim 5 wherein, The lower end of the steam pipe (24) is closed, and a drain hole (242) is provided at the closed end of the steam pipe (24). The steam hole (241) is located on the upper side of the steam branch pipe (24), and the drain hole (242) is located on the lower side of the steam branch pipe (24).

7. A steam curing apparatus for concrete segments as defined in claim 1, wherein The bottom wall of the steam curing kiln (1) is provided with a track groove (11), the length direction of the track groove (11) is set along the length direction of the steam curing kiln (1), and the track groove (11) is located directly below the tube mold (3); The bottom of the track groove (11) is provided with a conveying sub-car (61), the conveying sub-car (61) is provided with a jacking assembly, and the conveying sub-car (61) can move on the bottom of the track groove (11) along the length direction of the track groove (11).

8. A steam curing apparatus for concrete segments as defined in claim 7, wherein The bottom of the track groove (11) is also provided with two support columns (13), the two support columns (13) are spaced apart along the width direction of the track groove (11), and the upper end of the support column (13) protrudes from the bottom wall of the steam curing kiln (1); The segment mold (3) is placed on the two support columns (13), and the conveying sub-car (61) and the jacking assembly are located between the two support columns (13).

9. A steam curing process for concrete segments using a steam curing apparatus for concrete segments according to any one of the preceding claims 1 to 8, characterized in that, The method comprises the following steps: S1, install a temperature sensor (51) on the segment mold (3), and make the detection end of the temperature sensor (51) contact the concrete segment in the segment mold (3); S2, conveying the segment mold (3) into the steam curing kiln (1), and closing the steam curing kiln (1); S3, start the steam supply mechanism (2) to convey steam into the steam curing kiln (1), carry out steam curing, and the temperature sensor (51) detects the temperature of the concrete segment in real time; S4, transmit the real-time detected temperature data to the control mechanism (4), the control mechanism (4) compares the temperature data with the preset process temperature curve, and controls the opening or stop of the steam supply mechanism (2) according to the comparison result, so that the temperature change of the concrete segment conforms to the preset process temperature curve; S5, steam curing is finished, open the steam curing kiln (1), and take out the segment mold (3) containing the concrete segment.

10. A process for autoclave curing of concrete segments as claimed in claim 9 wherein, Step S4 further comprises the following steps: S41, according to the mixing ratio of the concrete used by the concrete segment and the curing requirement, a preset process temperature curve is established; S42, the temperature data of the concrete segment is collected in real time by a plurality of temperature sensors (51), and the temperature data is sent to the control mechanism (4); S43, the control mechanism (4) compares the received real-time temperature with the target value at the current time on the preset process temperature curve; S44, according to the comparison result of step S43, control the opening or closing of the steam supply mechanism (2); S45, repeat steps S42-S44 until the steam curing is finished.

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