Intelligent spraying and curing device for spiral water pipe in concrete box girder box and operation method

Abstract

The invention discloses an intelligent spraying and curing device for a spiral water pipe in a concrete box girder box and an operation method, the intelligent spraying and curing device comprises the spiral water pipe which is arranged in a cast-in-place or prefabricated concrete box girder box along the length direction of the concrete box girder, and two ends of the spiral water pipe are respectively provided with a lifting hook; a plurality of nozzles, a plurality of hygrometers and a water inlet pipe which is communicated with the spiral water pipe and supplies water are arranged on the spiral water pipe; therefore, the lifting hooks at the two ends of the spiral water pipe can be hooked to the transverse bolts at the two ends of the concrete box girder respectively, and after the adjacent spiral water pipes in each ring are stretched into the spiral water pipes with certain intervals, the water spraying range of the multiple sprayers can cover the overall length in the box to form spraying maintenance operation. Therefore, the intelligent spraying and curing device for the spiral water pipe in the concrete box girder box is simple in structure, economical, convenient to use, capable of saving energy and reducing emission and remarkable in effect, and by combining with a corresponding implementation method, the intelligent spraying and curing device has high economic benefits, energy-saving and emission-reducing benefits and social benefits.

Description

Technical Field

[0001] The invention relates to an intelligent spraying maintenance device in the field of energy-saving ecological bridge construction, and specifically refers to an intelligent spraying maintenance device for spiral water pipes in a concrete box beam and an operating method. Background Art

[0002] Concrete box girders are commonly used superstructures for bridges. Cast-in-place or prefabricated concrete box girders require good maintenance to ensure quality. Existing concrete box girders are divided into two parts: the outer surface maintenance of the box girder and the inner maintenance of the box girder. The outer surface maintenance of the box girder usually uses sprinkling or spraying. The outer part of the box girder is regularly sprinkled with water, and geotextiles are promptly covered on the outer part of the box girder to reduce water evaporation; the inner maintenance of the box is to spray water mist on the concrete inside the box girder through the steel skeleton installed with a nozzle to keep the concrete surface moist. Due to the limited space of the cast-in-place or prefabricated box girder site, it is difficult to pass the full-length steel skeleton with a nozzle installed for the inner curing of the box into the box. Even the steel skeleton connected in sections is time-consuming and laborious to pass into the box. Therefore, it is necessary to improve the existing inner curing method of concrete box girders, improve the efficacy of curing operations, reduce production costs and ensure the quality of concrete curing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a concrete box girder internal spiral water pipe intelligent spraying maintenance device and operation method which is simple in structure, economical, easy to use, energy-saving and emission-reducing, and has significant effects.

[0004] The technical problem of the present invention is achieved through the following technical solutions: An intelligent spraying and curing device for spiral water pipes in a concrete box girder comprises a cast-in-place or prefabricated concrete box girder, wherein a spiral water pipe is arranged in the box of the concrete box girder along the length direction of the concrete box girder, hooks are arranged at both ends of the spiral water pipe, a plurality of nozzles and a plurality of hygrometers are arranged on the spiral water pipe, and a water inlet pipe connected to the spiral water pipe and supplying water is arranged; the hooks at both ends of the spiral water pipe are respectively hooked to the cross bolts at both ends of the concrete box girder, and after the spiral water pipes closely attached to each other in each ring are stretched into spiral water pipes separated by a certain distance in each ring, the water spraying range formed by the plurality of nozzles covers the entire length of the concrete box girder to form spraying curing.

[0005] The cross-sectional shape of the spiral water pipe is an elliptical cylinder, and a plurality of nozzles are installed at a certain distance in a left-right cross-sectional shape at the middle and upper part of the elliptical cylinder spiral water pipe.

[0006] The spiral water pipe is close to each other before stretching, and the radius of the spiral water pipe material is calculated by using an elliptical cylindrical spiral water pipe stretching spring. , the number of rings of the spiral water pipe is , calculate the lengths of the major and minor semi-axis respectively , assuming that the calculated lengths of the major and minor axes of the spiral water pipe remain unchanged before and after stretching, the length of the spiral water pipe after stretching is , then the relevant parameters are calculated as follows: Formula 1: Calculation of relevant parameters of spiral water pipe 1. Before stretching Elliptical Cylinder Equation The perimeter of the cross section of an elliptical cylinder In the formula, Initial pitch Initial length Initial helix angle Initial expanded length 2. After stretching Pitch after stretching , where The expansion ratio before and after stretching, Initial length after stretching Helix angle after stretching Length after stretching Formula 2: Calculation of tensile force of spiral water pipe Due to the complexity of the force mechanism of the elliptical cylindrical spiral spring, there is currently no accurate analysis and calculation method for the mechanical properties of the elliptical cylindrical spiral spring, and the influence relationship between parameters and mechanical properties is also unclear. According to the mechanical properties of the cylindrical spiral spring, the analogy method is used from a practical perspective to analyze and calculate the tensile force range of the spiral water pipe, and the construction control is carried out. The tensile deformation of the spiral water pipe is , then the tensile force and shear stress of the spiral water pipe are Tensile load The range of tension is , where is the tension coefficient of the spiral water pipe, obtained through experiments; Shear stress The range of shear stress is Formula 3: Material selection for spiral water pipes The radius of the spiral water pipe material The loss of water flowing in a spiral water pipe is partly caused by the loss along the way due to shear stress, and partly by the local loss caused by the double spiral flow formed by vortex and secondary flow. Therefore, the pressure drop caused by water flowing through the spiral section of the continuous pipe is much greater than that caused by water flowing through the straight section of the continuous pipe. The loss along the way is usually calculated by the Darcy-Weisbach formula. The longer the pipe, the greater the energy loss. The generation of local loss has nothing to do with the pipe length. The local resistance coefficient is generally determined by experiment, except for a few pipe fittings that are obtained by analytical methods. According to the basic principles of fluid mechanics, the loss of water flowing in the spiral pipe is calculated by consulting relevant literature, and the water pressure, nozzle specifications and quantity, and spraying time interval in the elliptical cylindrical spiral water pipe are determined by experiment. The water spraying effect of the nozzle is detected by a hygrometer, and the water spraying time is intelligently controlled to meet the box girder concrete maintenance standards. The symbols in Formula 1, Formula 2 and Formula 3 are defined as: ——respectively the ordinate, abscissa, and ordinate and abscissa parameters of the spiral water pipe with the center of the concrete box beam as the origin, and the units are ; ——respectively are the radius of the spiral water pipe material, the calculated major and minor semi-axis of the elliptical cylinder, and the number of rings of the spiral water pipe, in units of ; ——respectively are the pitch of the spiral water pipe, the initial length of the spiral water pipe, the unfolded length of each section of the spiral water pipe, and the initial spiral angle, and the units are ; ——are the unfolded length and initial spiral angle of the spiral water pipe, respectively, in units of ; ——respectively the pitch of the spiral water pipe after stretching, the length of the spiral water pipe after stretching, and the unfolded length of the spiral water pipe after stretching, and the units are ; ——respectively the expansion ratio of the spiral water pipe before and after stretching , the helix angle after stretching, and the expansion ratio is determined according to the convenience of production, transportation, installation, use and storage , expansion ratio It can be 5 to 10, and the units are ; ——respectively the tensile load and tensile deformation of the spiral water pipe after stretching, the units are ; ——respectively are the shear modulus of the spiral water pipe material and the tensile coefficient of the spiral water pipe, and the units are .

[0007] A plurality of rollers are installed at the bottom of the spiral water pipe, and the plurality of rollers assist the movement of the spiral water pipe in the concrete box beam.

[0008] Each of the nozzles is a fine atomizing nozzle, and the average diameter of the sprayed water mist particles is about 10 ~15 The working pressure of each nozzle is 0.2MPa~0.5MPa, and the flow rate and injection time of each nozzle are controlled by a solenoid valve with automatic control function.

[0009] The water inlet pipe is externally connected to a water pump, and the flow rate and flow velocity of the water pump are controlled by a controller.

[0010] Each of the hygrometers is a humidity-sensitive sensor, and by sensing the humidity changes in the concrete box girder, the humidity is converted into an electronic signal and transmitted to the controller. The average humidity measured by multiple hygrometers is used as a control indicator, and the controller automatically instructs multiple nozzles to stop replenishing the spraying of water mist particles.

[0011] The multiple nozzles and multiple humidity meters are installed in the reserved holes of the spiral water pipe. The water pump, the multiple nozzles and the multiple humidity meters are intelligently controlled by a controller to control the water spray flow, speed and humidity.

[0012] An operating method of a spiral water pipe intelligent spraying maintenance device in a concrete box beam comprises the following steps: Step 1: Design of intelligent spraying maintenance device for spiral water pipes in concrete box beams ① According to the concrete curing requirements of concrete box girders, a preliminary design scheme for the intelligent spray curing device of spiral water pipes inside the concrete box girders was initially proposed; ② Calculate the technical parameters of each component of the intelligent spraying maintenance device for spiral water pipes in the concrete box girder by using formulas 1, 2 and 3, and preliminarily determine the radius of the spiral water pipe material. , the number of rings of the spiral water pipe , calculate the major and minor axes of the elliptical cylinder , the length of the spiral water pipe after stretching The expansion ratio is determined based on the convenience of production, transportation, installation, use and storage. , expansion ratio It can be 5 to 10; ③ Preliminary determination of dimensionless coefficients through experiments or analogy value; ④ Carry out construction drawing design and entrust a professional unit to make spiral water pipes inside the concrete box girder, reserve installation holes for multiple sprinklers and multiple humidity meters, and the quality meets the design requirements; Step 2: Install the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① After the concrete box beam is cast in place or prefabricated and the formwork is removed, clean up the internal debris of the concrete box beam and arrange the embedded parts of the horizontal bolts fixed at both ends; ② Install multiple nozzles and multiple humidity meters on the spiral water pipe, and the multiple humidity meters and multiple nozzles are connected to the controller via solenoid valves; ③ Through the guide cable from one end of the concrete box girder to the other end, the hook at one end of the spiral water pipe is connected to the guide cable, and the guide cable is pulled to pull the spiral water pipe into the box with the help of multiple rollers, and connected to the hand chain hoist or electric winch; ④The horizontal bolts are welded to the embedded parts at both ends of the concrete box beam, the hook at one end of the spiral water pipe is connected to the horizontal bolt at one end of the concrete box beam, and the hand chain hoist or electric winch stretches the spiral water pipe so that the hook at the other end is connected to the horizontal bolt at the other end of the concrete box beam; ⑤ Connect the water inlet of the spiral water pipe to the water inlet pipe with a water pump and check whether there is water leakage at the joint; Step 3: Use the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① Turn on the water pump, multiple nozzles and multiple humidity meters, and adjust the water spraying time and drainage stop time of multiple nozzles, that is, the interval water spraying time; ②When the above debugging meets the design requirements, the debugging is completed. If it does not meet the design requirements, adjust the technical parameters of some components; ③ After curing for 7 days and meeting the design requirements, remove the spiral water pipe intelligent spray curing device inside the concrete box girder in the reverse order of installation, and move to the next concrete box girder for curing inside the box.

[0013] Compared with the prior art, the present invention mainly provides an intelligent spraying and maintenance device for a spiral water pipe inside a concrete box girder, the structure of which includes a cast-in-place or prefabricated concrete box girder, a spiral water pipe placed along the length direction of the concrete box girder is arranged inside the box of the concrete box girder, and hooks are respectively arranged at both ends of the spiral water pipe, a plurality of nozzles and a plurality of humidity meters are arranged on the spiral water pipe, and a water inlet pipe connected to the spiral water pipe and supplying water; in this way, the hooks at both ends of the spiral water pipe can be respectively hooked to the cross bolts at both ends of the concrete box girder, and after the spiral water pipes that are closely attached to each other in each ring are stretched into spiral water pipes that are separated by a certain distance in each ring, the water spraying range of the multiple nozzles can cover the entire length of the box to form a spraying and maintenance operation. Therefore, the present invention has the following advantages: First, the components of the intelligent spraying and curing device for spiral water pipes in the concrete box girder are simple to manufacture, low in cost, can be repeated many times, and have a high cost performance ratio; second, the spiral water pipes are convenient to manufacture, transport, install, use and store, and the spiral water pipes are convenient to segment and combine, which saves man-hours and has excellent curing effect; third, the intelligent spraying and curing device for spiral water pipes in the concrete box girder is finely controlled quantitatively, which saves a lot of water resources and improves the curing quality compared with the traditional method; fourth, the calculation method provided has a clear principle, is scientific and reasonable, and is practical and easy to implement, which can guide the implementation of the intelligent spraying and curing device for spiral water pipes in the concrete box girder, so as to save resources, reduce costs and improve the safety and quality performance of the project. Therefore, the present invention is a simple structure, economical, easy to use, energy-saving and emission-reducing, and effective intelligent spraying and curing device for spiral water pipes in the concrete box girder, which is combined with the corresponding implementation method and has high economic benefits, energy-saving and emission-reduction benefits and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic elevation view of the present invention.

[0015] Figure 2 for Figure 1 Left view of .

[0016] Figure 3 Diagram of the telescopic structure of a spiral water pipe (before stretching on the left - after stretching on the right). DETAILED DESCRIPTION

[0017] The embodiments of the present invention will be described in detail below with reference to the above-mentioned drawings.

[0018] like Figure 1~Figure 3 As shown, 1. concrete box girder, 2. spiral water pipe, 21. hook, 22. cross bolt, 23. roller, 3. water pump, 4. nozzle, 5. humidity meter, 6. water inlet pipe.

[0019] Intelligent spraying maintenance device and operation method of spiral water pipe in concrete box beam, such as Figure 1 , Figure 2As shown, it is mainly used for the in-box maintenance of concrete box beams 1, wherein the intelligent spraying maintenance device comprises a spiral water pipe 2 arranged in the box of the concrete box beam 1 and placed along the length direction of the concrete box beam, hooks 21 are respectively provided at both ends of the spiral water pipe, a plurality of nozzles 4 and a plurality of hygrometers 5 are provided on the spiral water pipe, and a water inlet pipe 6 connected to the spiral water pipe and supplying water.

[0020] The concrete box girder 1 is a reinforced concrete structure. When the concrete box girder is cast in situ or prefabricated, standard maintenance needs to be performed on the outer surface and the inside of the box girder during the concrete curing period.

[0021] The spiral water pipe 2 is made of engineering plastics with certain elasticity or engineering plastics and steel wire composite materials. Common materials include polyurethane, polyester elastomer, nylon, etc. These plastics have good elasticity and can undergo large elastic deformation after being subjected to force, and return to their original state after the external force is removed. Its elasticity is comparable to that of a metal spring, and it can withstand certain tensile, compressive and bending stresses. It can also be manufactured into elastic plastic water pipes of various shapes and sizes through molding processes such as injection molding and extrusion, and then bent on the elliptical cylinder to form an elliptical cylindrical spiral water pipe similar to a spring that meets the design requirements. All technical indicators meet the design requirements, so the shape of the cross-section of the spiral water pipe is matched with the flat section inside the concrete box girder, that is, its appearance is similar to the shape inside the concrete box girder, and the elliptical cylindrical spiral water pipe is designed with different lengths for each section depending on the convenience of production, transportation, installation, use and storage, and is composed of multiple sections of elliptical cylindrical spiral water pipes depending on the different longitudinal lengths of the concrete box girder. Connected.

[0022] Moreover, a plurality of nozzles 4 are cross-installed at a certain distance on the upper and middle part of the elliptical cylindrical spiral water pipe, and a plurality of matching hygrometers 5 are evenly installed on the elliptical cylindrical spiral water pipe 2.

[0023] Each of the nozzles 4 is a fine atomizing nozzle, and the average diameter of the sprayed water mist particles is about 10 ~15 The working pressure of each nozzle is 0.2MPa~0.5MPa, and the flow rate and injection time of each nozzle are controlled by a solenoid valve with automatic control function.

[0024] Each of the hygrometers 5 is a humidity sensor, and by sensing the humidity changes in the concrete box girder, the humidity is converted into an electronic signal and transmitted to the controller. The average humidity measured by multiple hygrometers is used as a control indicator, and the controller automatically instructs multiple nozzles to stop replenishing the spraying of water mist particles.

[0025] Meanwhile, hooks 21 are provided at both ends of the spiral water pipe 2, and a plurality of rollers 23 are installed at the bottom to assist the spiral water pipe 2 to move in the box of the concrete box beam 1 when being stretched.

[0026] The hooks 21 at both ends of the spiral water pipe 2 are respectively hooked on the cross bolts 22 at both ends of the concrete box girder, and after each ring of closely adjacent spiral water pipes is stretched into each ring of spiral water pipes separated by a certain distance, a plurality of nozzles 4 can form a water spray range covering the entire length of the concrete box girder 1 to form a spray curing device.

[0027] The water inlet pipe 6 is externally connected to a water pump 3, the specification, model and power of the water pump meet the design requirements, and the flow rate and flow velocity of the water pump 3 are controlled by a controller.

[0028] The multiple nozzles 4 and the multiple hygrometers 5 are installed in the reserved holes of the spiral water pipe 2. The water pump 3, the multiple nozzles 4, and the multiple hygrometers 5 are intelligently controlled by a controller to control the water spray flow, speed and humidity.

[0029] The spiral water pipe is close to each other before stretching, and the radius of the spiral water pipe material is calculated by using an elliptical cylindrical spiral water pipe stretching spring. , the number of rings of the spiral water pipe is , calculate the lengths of the major and minor semi-axis respectively , assuming that the calculated lengths of the major and minor axes of the spiral water pipe remain unchanged before and after stretching, the length of the spiral water pipe after stretching is , then the relevant parameters are calculated as follows: Formula 1: Calculation of relevant parameters of spiral water pipe 1. Before stretching Elliptical Cylinder Equation The perimeter of the cross section of an elliptical cylinder In the formula, Initial pitch Initial length Initial helix angle Initial expanded length 2. After stretching Pitch after stretching , where The expansion ratio before and after stretching, Initial length after stretching Helix angle after stretching Length after stretching Formula 2: Calculation of tensile force of spiral water pipe Due to the complexity of the force mechanism of the elliptical cylindrical spiral spring, there is currently no accurate analysis and calculation method for the mechanical properties of the elliptical cylindrical spiral spring, and the influence relationship between parameters and mechanical properties is also unclear. According to the mechanical properties of the cylindrical spiral spring, the analogy method is used from a practical perspective to analyze and calculate the tensile force range of the spiral water pipe, and the construction control is carried out. The tensile deformation of the spiral water pipe is , then the tensile force and shear stress of the spiral water pipe are Tensile load The range of tension is , where is the tension coefficient of the spiral water pipe, obtained through experiments; Shear stress The range of shear stress is Formula 3: Material selection for spiral water pipes The radius of the spiral water pipe material The loss of water flowing in a spiral water pipe is partly caused by the loss along the way due to shear stress, and partly by the local loss caused by the double spiral flow formed by vortex and secondary flow. Therefore, the pressure drop caused by water flowing through the spiral section of the continuous pipe is much greater than that caused by water flowing through the straight section of the continuous pipe. The loss along the way is usually calculated by the Darcy-Weisbach formula. The longer the pipe, the greater the energy loss. The generation of local loss has nothing to do with the pipe length. The local resistance coefficient is generally determined by experiment, except for a few pipe fittings that are obtained by analytical methods. According to the basic principles of fluid mechanics, the loss of water flowing in the spiral pipe is calculated by consulting relevant literature, and the water pressure, nozzle specifications and quantity, and spraying time interval in the elliptical cylindrical spiral water pipe are determined by experiment. The water spraying effect of the nozzle is detected by a hygrometer, and the water spraying time is intelligently controlled to meet the box girder concrete maintenance standards. The symbols in Formula 1, Formula 2 and Formula 3 are defined as: ——respectively the ordinate, abscissa, and ordinate and abscissa parameters of the spiral water pipe with the center of the concrete box beam as the origin, and the units are ; ——respectively are the radius of the spiral water pipe material, the calculated major and minor semi-axis of the elliptical cylinder, and the number of rings of the spiral water pipe, in units of ; ——respectively are the pitch of the spiral water pipe, the initial length of the spiral water pipe, the unfolded length of each section of the spiral water pipe, and the initial spiral angle, and the units are ; ——are the unfolded length and initial spiral angle of the spiral water pipe, respectively, in units of ; ——respectively the pitch of the spiral water pipe after stretching, the length of the spiral water pipe after stretching, and the unfolded length of the spiral water pipe after stretching, and the units are ; ——respectively the expansion ratio of the spiral water pipe before and after stretching , the helix angle after stretching, and the expansion ratio is determined according to the convenience of production, transportation, installation, use and storage , expansion ratio It can be 5 to 10, and the units are ; ——respectively the tensile load and tensile deformation of the spiral water pipe after stretching, the units are ; ——respectively are the shear modulus of the spiral water pipe material and the tensile coefficient of the spiral water pipe, and the units are .

[0030] An operating method of a spiral water pipe intelligent spraying maintenance device in a concrete box beam comprises the following steps: Step 1: Design of intelligent spraying maintenance device for spiral water pipes in concrete box beams ① According to the concrete curing requirements of concrete box girders, a preliminary design scheme for the intelligent spray curing device of spiral water pipes inside the concrete box girders was initially proposed; ② Calculate the technical parameters of each component of the intelligent spraying maintenance device for spiral water pipes in the concrete box girder by using formulas 1, 2 and 3, and preliminarily determine the radius of the spiral water pipe material. , the number of rings of the spiral water pipe , calculate the major and minor axes of the elliptical cylinder , the length of the spiral water pipe after stretching The expansion ratio is determined based on the convenience of production, transportation, installation, use and storage. , expansion ratio It can be 5 to 10; ③ Preliminary determination of dimensionless coefficients through experiments or analogy value; ④ Carry out construction drawing design and entrust a professional unit to make spiral water pipes inside the concrete box girder, reserve installation holes for multiple sprinklers and multiple humidity meters, and the quality meets the design requirements; Step 2: Install the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① After the concrete box beam is cast in place or prefabricated and the formwork is removed, clean up the internal debris of the concrete box beam and arrange the embedded parts of the horizontal bolts fixed at both ends; ② Install multiple nozzles and multiple humidity meters on the spiral water pipe, and the multiple humidity meters and multiple nozzles are connected to the controller via solenoid valves; ③ Through the guide cable from one end of the concrete box girder to the other end, the hook at one end of the spiral water pipe is connected to the guide cable, and the guide cable is pulled to pull the spiral water pipe into the box with the help of multiple rollers, and connected to the hand chain hoist or electric winch; ④The horizontal bolts are welded to the embedded parts at both ends of the concrete box beam, the hook at one end of the spiral water pipe is connected to the horizontal bolt at one end of the concrete box beam, and the hand chain hoist or electric winch stretches the spiral water pipe so that the hook at the other end is connected to the horizontal bolt at the other end of the concrete box beam; ⑤ Connect the water inlet of the spiral water pipe to the water inlet pipe with a water pump and check whether there is water leakage at the joint; Step 3: Use the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① Turn on the water pump, multiple nozzles and multiple humidity meters, and adjust the water spraying time and drainage stop time of multiple nozzles, that is, the interval water spraying time; ②When the above debugging meets the design requirements, the debugging is completed. If it does not meet the design requirements, adjust the technical parameters of some components; ③ After curing for 7 days and meeting the design requirements, remove the spiral water pipe intelligent spray curing device inside the concrete box girder in the reverse order of installation, and move to the next concrete box girder for curing inside the box.

[0031] The embodiments of the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should also be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the present application.

Claims

1. A spiral water pipe intelligent spraying maintenance device in a concrete box beam, comprising a cast-in-place or prefabricated concrete box beam, characterized in that The concrete box girder (1) is provided with a spiral water pipe (2) placed along the length direction of the concrete box girder, and hooks (21) are respectively provided at both ends of the spiral water pipe. The spiral water pipe is provided with a plurality of nozzles (4) and a plurality of humidity meters (5), as well as a water inlet pipe (6) connected to the spiral water pipe and supplying water; the hooks (21) at both ends of the spiral water pipe (2) are respectively hooked to the cross bolts (22) at both ends of the concrete box girder (1), and after each ring of closely adjacent spiral water pipes is stretched into each ring of spiral water pipes separated by a certain distance, the water spraying range formed by the plurality of nozzles (4) covers the entire length of the concrete box girder (1) to form spray curing.

2. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that The cross-sectional shape of the spiral water pipe (2) is an elliptical cylinder, and a plurality of nozzles (4) are installed in the middle and upper part of the elliptical cylinder spiral water pipe (2) in a cross-sectional shape at a certain distance from left to right.

3. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 2 is characterized in that Before the spiral water pipe (2) is stretched, each ring is close together, and a simulation calculation is performed using an elliptical cylindrical spiral water pipe stretching spring. The radius of the spiral water pipe material , the number of rings of the spiral water pipe is , calculate the lengths of the major and minor semi-axis respectively , assuming that the calculated lengths of the major and minor axes of the spiral water pipe remain unchanged before and after stretching, the length of the spiral water pipe after stretching is , then the relevant parameters are calculated as follows: Formula 1: Calculation of relevant parameters of spiral water pipe 1. Before stretching Elliptical cylinder equation The perimeter of the cross section of an elliptical cylinder In the formula, Initial pitch Initial length Initial helix angle Initial expanded length 2. After stretching Pitch after stretching , where The expansion ratio before and after stretching, Initial length after stretching Helix angle after stretching Length after stretching Formula 2: Calculation of tensile force of spiral water pipe Due to the complexity of the force mechanism of the elliptical cylindrical spiral spring, there is currently no accurate analysis and calculation method for the mechanical properties of the elliptical cylindrical spiral spring, and the influence relationship between parameters and mechanical properties is also unclear. According to the mechanical properties of the cylindrical spiral spring, the analogy method is used from a practical perspective to analyze and calculate the tensile force range of the spiral water pipe, and the construction control is carried out. The tensile deformation of the spiral water pipe is , then the tensile force and shear stress of the spiral water pipe are Tensile load The range of tension is , where is the tension coefficient of the spiral water pipe, obtained through experiments; Shear stress The range of shear stress is Formula 3: Material selection for spiral water pipes The radius of the spiral water pipe material The loss of water flowing in a spiral water pipe is partly caused by the loss along the way due to shear stress, and partly by the local loss caused by the double spiral flow formed by vortex and secondary flow. Therefore, the pressure drop caused by water flowing through the spiral section of the continuous pipe is much greater than that caused by water flowing through the straight section of the continuous pipe. The loss along the way is usually calculated by the Darcy-Weisbach formula. The longer the pipe, the greater the energy loss. The generation of local loss has nothing to do with the pipe length. The local resistance coefficient is generally determined by experiment, except for a few pipe fittings that are obtained by analytical methods. According to the basic principles of fluid mechanics, the loss of water flowing in the spiral pipe is calculated by consulting relevant literature, and the water pressure, nozzle specifications and quantity, and spraying time interval in the elliptical cylindrical spiral water pipe are determined by experiment. The water spraying effect of the nozzle is detected by a hygrometer, and the water spraying time is intelligently controlled to meet the box girder concrete maintenance standards. The symbols in Formula 1, Formula 2 and Formula 3 are defined as: ——respectively the ordinate, abscissa, and ordinate and abscissa parameters of the spiral water pipe (2) with the center of the concrete box beam (1) as the origin, and the units are ; ——respectively are the radius of the spiral water pipe material, the calculated major and minor semi-axis of the elliptical cylinder, and the number of rings of the spiral water pipe, in units of ; ——respectively are the pitch of the spiral water pipe, the initial length of the spiral water pipe, the unfolded length of each section of the spiral water pipe, and the initial spiral angle, and the units are ; ——are the unfolded length and initial spiral angle of the spiral water pipe, respectively, in units of ; ——respectively the pitch of the spiral water pipe after stretching, the length of the spiral water pipe after stretching, and the unfolded length of the spiral water pipe after stretching, and the units are ; ——respectively the expansion ratio of the spiral water pipe before and after stretching , the helix angle after stretching, and the expansion ratio is determined according to the convenience of production, transportation, installation, use and storage , expansion ratio It can be 5 to 10, and the units are ; ——respectively the tensile load and tensile deformation of the spiral water pipe after stretching, the units are ; ——respectively are the shear modulus of the spiral water pipe material and the tensile coefficient of the spiral water pipe, and the units are .

4. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that A plurality of rollers (23) are installed at the bottom of the spiral water pipe (2), and the plurality of rollers assist the movement of the spiral water pipe (2) in the concrete box beam.

5. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that Each of the nozzles (4) is a fine atomizing nozzle, and the average diameter of the sprayed water mist particles is about 10 ~15 The working pressure of each nozzle is 0.2MPa~0.5MPa, and the flow rate and injection time of each nozzle are controlled by a solenoid valve with automatic control function.

6. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that The water inlet pipe (6) is externally connected to a water pump (3), and the flow rate and flow velocity of the water pump are controlled by a controller.

7. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that Each of the hygrometers (5) is a humidity sensor, and by sensing the humidity change in the concrete box girder, the humidity is converted into an electronic signal and transmitted to the controller. The average humidity measured by multiple hygrometers is used as a control indicator, and the controller automatically instructs multiple nozzles to stop replenishing the spraying of water mist particles.

8. The intelligent spraying and curing device for spiral water pipes in a concrete box beam according to claim 1 is characterized in that The plurality of nozzles (4) and the plurality of hygrometers (5) are installed in the reserved holes of the spiral water pipe (2); the water pump (3), the plurality of nozzles (4) and the plurality of hygrometers (5) are intelligently controlled by a controller to control the water spraying flow rate, speed and humidity.

9. An operating method of an intelligent spraying and curing device for spiral water pipes in a concrete box beam, characterized in that The operation method comprises the following steps: Step 1: Design of intelligent spraying maintenance device for spiral water pipes in concrete box beams ① According to the concrete curing requirements of concrete box girders, a preliminary design scheme for the intelligent spray curing device of spiral water pipes inside the concrete box girders was initially proposed; ② Calculate the technical parameters of each component of the intelligent spraying maintenance device for spiral water pipes in the concrete box girder by using formulas 1, 2 and 3, and preliminarily determine the radius of the spiral water pipe material. , the number of rings of the spiral water pipe , calculate the major and minor axes of the elliptical cylinder , the length of the spiral water pipe after stretching The expansion ratio is determined based on the convenience of production, transportation, installation, use and storage. , expansion ratio It can be 5 to 10; ③ Preliminary determination of dimensionless coefficients through experiments or analogy value; ④ Carry out construction drawing design and entrust a professional unit to make spiral water pipes inside the concrete box girder, reserve installation holes for multiple sprinklers and multiple humidity meters, and the quality meets the design requirements; Step 2: Install the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① After the concrete box beam is cast in place or prefabricated and the formwork is removed, clean up the internal debris of the concrete box beam and arrange the embedded parts of the horizontal bolts fixed at both ends; ② Installing a plurality of nozzles (4) and a plurality of hygrometers (5) on the spiral water pipe (2), wherein the plurality of hygrometers and the plurality of nozzles are connected to the controller via a solenoid valve; ③ A guide cable is passed from one end of the concrete box girder to the other end, a hook (21) at one end of the spiral water pipe is connected to the guide cable, and the guide cable is pulled to pull the spiral water pipe into the box with the help of multiple rollers (23), and a hand winch or electric winch is connected; ④ The horizontal bolts are welded to the embedded parts at both ends of the concrete box girder, the hook at one end of the spiral water pipe is connected to the horizontal bolt (22) at one end of the concrete box girder, and the hand chain hoist or electric winch stretches the spiral water pipe so that the hook at the other end is connected to the horizontal bolt at the other end of the concrete box girder; ⑤ Connect the water inlet of the spiral water pipe to the water inlet pipe (6) with the water pump (3), and check whether there is water leakage at the joint; Step 3: Use the spiral water pipe intelligent spray maintenance device inside the concrete box beam ① Turn on the water pump, multiple nozzles and multiple humidity meters, and adjust the water spraying time and drainage stop time of the multiple nozzles (4), that is, the interval water spraying time; ②When the above debugging meets the design requirements, the debugging is completed. If it does not meet the design requirements, adjust the technical parameters of some components; ③ After curing for 7 days and meeting the design requirements, remove the spiral water pipe intelligent spray curing device inside the concrete box girder in the reverse order of installation, and move to the next concrete box girder for curing inside the box.

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