A precast box girder spraying maintenance device

Abstract

The present invention provides a precast box girder spraying and curing device, which is composed of a plurality of curing plates spliced with each other. The curing plate includes a heat preservation plate, which has a cavity inside, one side of which is an opening and is communicated with the cavity inside. The opening side is used for buckling on the surface of the precast box girder; a plurality of nozzles are provided and are installed in the cavity of the heat preservation plate, and their water spraying ports are arranged towards the bottom direction of the heat preservation plate, and each nozzle is connected to a water supply pipeline; a plurality of liquid equalizing plates are provided and are installed on one side of the nozzle towards the bottom of the heat preservation plate, and adjacent liquid equalizing plates are arranged at intervals. The liquid equalizing plate is bent to form an opening, and the opening direction of the liquid equalizing plate is arranged towards the nozzle. With the above technical features, the heat preservation plate provides a closed heat preservation environment, and the liquid sprayed by the nozzle splashes onto the liquid equalizing plate, making the liquid drip more evenly onto the surface of the precast box girder, which not only ensures the heat preservation effect of the precast box girder area, but also meets the hydration reaction of cement and water.

Description

Technical Field

[0001] The present invention generally relates to the field of concrete building materials, and particularly relates to a spray curing device for precast box girders. Background Art

[0002] A precast box girder is a beam structure prefabricated in a factory or precast yard. It is a box-shaped cross-section beam, usually cast from concrete. The shape of the box-shaped cross-section is similar to a box, with upper and lower flange plates and webs on both sides, and a hollow part in the middle. This structural form enables the precast box girder to have good mechanical properties when bearing vertical and horizontal loads, and can effectively transfer the loads of the upper structure to the lower piers and foundations.

[0003] During the curing process of concrete products, water is a crucial factor. When cement is mixed with water, complex hydration reactions occur. In this process, the mineral components (such as tricalcium silicate, dicalcium silicate, etc.) on the surface of cement particles react with water to form products such as calcium silicate hydrate gel and calcium hydroxide. These hydration products are intertwined and fill the voids between aggregates such as sand and gravel, causing the concrete to gradually set and harden, thereby obtaining strength and durability.

[0004] Thermal insulation measures are also particularly important. Mass concrete generates a large amount of heat during the hydration process, resulting in an increase in the internal temperature of the concrete. If the temperature difference between the internal and external temperatures is too large, temperature stress will be generated, leading to concrete cracking.

[0005] Common curing of concrete products generally adopts the method of sprinkling water for curing. Although it can ensure the hydration reaction between cement and water, due to the temperature difference change between the inside and outside of the concrete, it is extremely easy to cause cracking of the concrete products, affecting the quality of the concrete products. Summary of the Invention

[0006] In view of the above problems existing in the prior art, according to the present invention, a spray curing device for precast box girders is provided, which is composed of a plurality of curing plates spliced together. The curing plate includes a heat insulation plate with a cavity formed inside, one side of which is an opening and is in communication with the cavity inside, and the opening side is used for buckling on the surface of the precast box girder; a plurality of spray heads are provided and are installed in the cavity of the heat insulation plate, and their water spraying ports are arranged towards the bottom direction of the heat insulation plate, and each spray head is connected to a water supply pipeline; a plurality of liquid equalizing plates are provided and are installed on the side of the spray head facing the bottom of the heat insulation plate, and adjacent liquid equalizing plates are arranged at intervals. The liquid equalizing plate is bent to form an opening, and the opening direction of the liquid equalizing plate faces the spray head. With the above technical features, the heat insulation plate provides a closed heat insulation environment, and the liquid sprayed by the spray head splashes onto the liquid equalizing plate, making the liquid drip more evenly and dispersedly onto the surface of the precast box girder, which not only ensures the heat insulation effect in the area of the precast box girder, but also meets the hydration reaction between cement and water.

[0007] In some embodiments, a water absorbing layer is further provided at the bottom of the insulation board, and the water absorbing layer abuts against the side of the liquid balancing plate facing away from the outlet. Therefore, when the nozzle sprays water, part of the water source will splash into the water absorbing layer through the gap between the liquid balancing plates, thereby storing the water and prolonging the long-term humidity control in the insulation board. Moreover, the water absorbing layer is in contact with the liquid balancing plate, and the excess water source can also drip onto the surface of the prefabricated box beam through the drainage of the liquid balancing plate to ensure the surface of the prefabricated box beam is moistened.

[0008] In some embodiments, an extension plate is provided on the side of the liquid balancing plate that is away from its own opening and extends toward the bottom of the heat preservation plate, and the side of the extension plate that is away from the liquid balancing plate abuts against the water absorption layer. Thus, the extension plate plays a role in framing the water absorption layer, physically moving the water absorption layer away from the liquid balancing plate, reducing the spatial area where the water absorption layer and the liquid balancing plate are in contact with each other, thereby delaying the efficiency of liquid drainage to the liquid balancing plate, and further delaying the loss of water inside the water absorption layer.

[0009] In some embodiments, the side of the extension plate abutting against the water absorbing layer is wavy. Thus, the wavy extension plate can reduce the area where the extension plate and the water absorbing layer contact each other, slowing down the loss rate of water flow in the water absorbing layer, and the wavy contact area is smoother, avoiding the local contact area being too sharp, which increases the flow diversion efficiency and accelerates the dripping speed of the liquid balancing plate.

[0010] In some embodiments, the edge of the opening of the liquid balancing plate is provided with a plurality of notches along its length direction, so that a plurality of water-reservoir dripping parts are formed on the edge, thereby making it easier for the liquid flowing on the liquid balancing plate to be collected in the water-reservoir dripping parts, thereby speeding up the efficiency of the liquid dripping and reducing the residence time of the liquid on the liquid balancing plate.

[0011] In some embodiments, a coiled humidifying tube is fixed at the bottom of the insulation board, one end of the humidifying tube is sealed, and the other end is connected to an external water source. A plurality of water holes are spaced around the humidifying tube. Thus, the water absorption layer can be injected with water according to the ambient humidity in the insulation board, thereby controlling the ambient humidity in the insulation board. The ambient humidity in the insulation board can be accurately controlled in the drying stage of the later stage of maintenance. On the other hand, the waste caused by the large amount of water splashing from the nozzle can be reduced, saving water consumption.

[0012] In some embodiments, the water hole is provided in the direction of the humidifying tube toward the bottom wall of the insulation board. Thus, when the humidifying tube is filled with water, the water source splashes onto the inner wall of the insulation board, which can increase the splashing range of the water source, thereby improving the uniformity of the distribution of the water source in the water absorption layer.

[0013] In some embodiments, both ends of each liquid leveling plate are slidably connected to the inner wall of the heat preservation plate along the height direction of the heat preservation plate. Thus, during the process of the nozzle spraying water, the liquid leveling plate receives most of the liquid, and under the impact of the water source, it will drive the extension plate to reciprocally press against the water absorption layer, accelerating the water flow efficiency inside the water absorption layer and making the water source distribution inside the water absorption layer more uniform.

[0014] In some embodiments, a slider is fixedly connected to each end of the liquid leveling plate, and a sliding groove for accommodating the slider to slide is formed in the relative area of the inner wall of the heat preservation plate along the height direction of the heat preservation plate. Thus, the effect of the sliding of the liquid leveling plate and the heat preservation plate is achieved.

[0015] In some embodiments, the cross-section of the slider is rectangular. Thus, the swinging of the liquid leveling plate is restricted. On the one hand, the uniformity of the liquid dripping from the liquid leveling plate is ensured, and on the other hand, the stability of the contact between the extension plate and the water absorption layer is ensured.

[0016] It should be understood that the content described in the Summary of the Invention section is not intended to limit the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows the overall structural schematic diagram of a precast box girder spray curing device according to an embodiment of the present invention;

[0018] Figure 2 Shows the side structural cross-sectional view of a precast box girder spray curing device according to an embodiment of the present invention;

[0019] Figure 3 Shows the structural schematic diagram of the spray area in a precast box girder spray curing device according to an embodiment of the present invention;

[0020] Figure 4 Shows the structural schematic diagram of the uniform dispersion area in a precast box girder spray curing device according to an embodiment of the present invention;

[0021] Figure 5 Shows the structural schematic diagram of the moisture preservation area in a precast box girder spray curing device according to an embodiment of the present invention;

[0022] Figure 6 Shows the structural schematic diagram of the humidification area in a precast box girder spray curing device according to an embodiment of the present invention;

[0023] Figure 7 Shows the structural schematic diagram of the liquid leveling plate in a precast box girder spray curing device according to an embodiment of the present invention;

[0024] Figure 8The structural schematic diagram of the inner wall of the heat preservation board in a precast box girder spray curing device according to an embodiment of the present invention is shown.

[0025] Symbolic description

[0026] 1. Heat preservation board; 11. Reserved area; 12. Spraying area; 13. Uniform dispersion area; 14. Moisture preservation area; 15. Humidification area; 16. Slide groove; 21. Frame body; 22. Sprinkler head; 3. Liquid uniform plate; 31. Sputtering plate; 311. Notch; 312. Water storage drip part; 4. Water absorption layer; 41. Sponge; 42. Cloth sleeve; 5. Humidifying pipe; 51. Water through hole; 6. Extension plate; 7. Slide block. Specific implementation manners

[0027] Next, the preferred embodiments (or implementation manners) of the present invention will be described in detail with reference to the accompanying drawings.

[0028] The present invention provides a precast box girder spray curing device, the main function of which is to cure the horizontal plane area of the precast box girder. It is composed of a plurality of curing boards spliced together. The curing board is provided with a sprinkler head 22 inside, so as to not only achieve the heat preservation effect of the covered area, but also meet the complex hydration reaction of cement and water.

[0029] Next, refer to Figures 1-8 to describe a precast box girder spray curing device of the present new type.

[0030] Figure 1 The overall structural schematic diagram of a precast box girder spray curing device according to an embodiment of the present invention is shown; Figure 2 The side structural sectional view of a precast box girder spray curing device according to an embodiment of the present invention is shown. Refer to Figure 1 and Figure 2 As shown, a precast box girder spray curing device provided in this embodiment is composed of a plurality of curing boards spliced together. Among them, the curing board includes a heat preservation board 1. The heat preservation board 1 is generally rectangular in structure to ensure that the gap between adjacent heat preservation boards 1 is reduced when splicing, and to ensure the curing effect of the horizontal plane of the precast box girder. The heat preservation board 1 is mainly made of heat preservation materials, which can be rock wool, glass wool, or polystyrene foam board or polyurethane foam in organic heat preservation materials. A cavity is provided inside the heat preservation board 1, and one side thereof is provided with an opening communicating with the internal cavity. Looking from the side, in the heat preservation board 1, a reserved area 11, a spraying area 12, a uniform dispersion area 13, a moisture preservation area 14, and a humidification area 15 are sequentially arranged from the opening side to the bottom of the heat preservation board 1.

[0031] Among them, the blank area 11 is the blank area at the edge of the insulation board 1, and its area height is generally 4 cm - 8 cm. On the one hand, it can improve the dispersion range of the splashed liquid in the spraying area 12 and ensure the uniformity of liquid distribution. On the other hand, it also leaves a safety space to avoid the internal components of the insulation board 1 from being oppressed and coming into contact with the surface of the precast box girder.

[0032] Figure 3 The structural schematic diagram of the spraying area 12 in a precast box girder spraying maintenance device according to an embodiment of the present invention is shown. Refer to Figure 3 As shown, the spraying area 12 is composed of a frame body 21 and spray nozzles 22. The spray nozzles 22 are scattering spray nozzles 22 and are provided in plurality, and are evenly distributed within the range of the spraying area 12. The adjacent spray nozzles 22 are arranged at intervals and are fixedly connected to each other by the frame body 21. The frame body 21 is fixed on the inner wall of the insulation board 1. Each spray nozzle 22 is arranged along the height direction of the insulation board 1, and its liquid spraying end faces the opening direction away from the insulation board 1. Moreover, each spray nozzle 22 is connected to each other by a water supply pipe and is jointly communicated with an external water source. Through the supply of the external water source, the plurality of spray nozzles 22 perform a dispersed water spraying operation towards the bottom direction of the insulation board 1.

[0033] Figure 4 The structural schematic diagram of the even dispersion area 13 in a precast box girder spraying maintenance device according to an embodiment of the present invention is shown. Refer to Figure 4 As shown, the even dispersion area 13 is composed of a plurality of liquid even plates 3. The adjacent liquid even plates 3 are arranged at intervals. In this embodiment, the total number of the liquid even plates 3 is taken as 7 as an example and is erected in the middle area of the insulation board 1. The liquid even plate 3 is a plate body formed by bending the middle part of a straight plate. Specifically, it may include two sputtering plates 31 arranged at an angle, and an opening with an angle between 60° - 90° is formed between the two sputtering plates 31. Inside the insulation board 1, its opening direction faces the direction of the spray nozzles 22. When the spray nozzles 22 work, the liquid is evenly splashed towards the direction of the liquid even plates 3. Part of the liquid will splash onto the inner wall of the sputtering plates 31, and under the action of water pressure, the liquid splashes everywhere and evenly splashes onto the horizontal plane of the precast box girder under the action of gravity, thereby improving the uniformity of liquid splashing and ensuring the uniform contact between the liquid and the surface of the covered area of the insulation board 1.

[0034] Figure 5 The structural schematic diagram of the moisture preservation area 14 in a precast box girder spraying maintenance device according to an embodiment of the present invention is shown. Refer to Figure 5As shown, a water-absorbing layer 4 is provided in the moisture preservation area 14. The water-absorbing layer 4 can be a sponge 41 and a cloth cover 42 covering the outside of the sponge 41. The edge of the water-absorbing layer 4 is fixed to the inner wall of the heat preservation board 1, and the middle area thereof is supported by a plurality of liquid leveling plates 3 at the bottom. When the liquid is splashed by the nozzle 22, due to the spaced arrangement of the liquid leveling plates 3, part of the liquid will splash into the water-absorbing layer 4 through the gaps between the liquid leveling plates 3 and be adsorbed by the sponge 41. Since the sponge 41 is prone to damage under wear, the cloth cover 42 not only protects the sponge 41 but also does not affect the normal water absorption of the sponge 41, thereby delaying the service life of the water-absorbing layer 4. In the environment where the heat preservation board 1 is long-term covered with the precast box girder, the moisture inside the water-absorbing layer 4 delays the loss of the environmental humidity in the cavity of the heat preservation board 1, thus ensuring the environmental humidity for the maintenance of the precast box girder. Moreover, if there is more moisture inside the water-absorbing layer 4, under the support of the liquid leveling plates 3, the excess moisture can also be drained through the bending area of the liquid leveling plates 3, and through the back sides of the two sputtering plates 31, the excess liquid is evenly dripped on the area covered by the heat preservation board 1.

[0035] Figure 6 The structure diagram of the humidifying area 15 in a precast box girder spray maintenance device according to an embodiment of the present invention is shown. Refer to Figure 6 As shown, the humidifying area 15 includes a humidifying pipe 5. One end of the humidifying pipe 5 is sealed, and the other end passes through the side wall of the heat preservation board 1 and is interconnected with an external water source. The humidifying pipe 5 is coiled around the upper bottom of the heat preservation board 1 and fixed in the top area of the heat preservation board 1. The humidifying pipe 5 is provided with a plurality of water passing holes 51 at intervals. In the later stage of concrete maintenance, there is no need to spray a large amount of water through the nozzle 22 to ensure the environmental humidity in the area covered by the heat preservation board 1. Water can be injected through the humidifying pipe 5 to wet the water-absorbing layer 4, so as to ensure the humidity environment in the area covered by the heat preservation board 1 under the slow evaporation of the liquid in the water-absorbing layer 4.

[0036] In some embodiments, in order to improve the uniformity of the distribution of moisture in the water-absorbing layer 4, the above-mentioned water passing holes 51 are opened in the area of the humidifying pipe 5 facing the top of the heat preservation board 1. When the water passing holes 51 discharge water, under the action of water pressure, the liquid splashes onto the top of the heat preservation board 1, generating a diffusion effect, so that the liquid can be evenly sprayed above the water-absorbing layer 4, making the water storage amounts in each area of the water-absorbing layer 4 more uniform.

[0037] Figure 7 The partial structure diagram of the liquid leveling plate 3 in a precast box girder spray maintenance device according to an embodiment of the present invention is shown. Refer to Figure 7As shown, in some embodiments, in order to slow down the water loss of the water absorption layer 4, an extension plate 6 is provided along the length direction of the tip of the liquid distribution plate 3 facing the water absorption layer 4. The extension plate 6 supports the bottom of the water absorption layer 4, physically separating the water absorption layer 4 from the liquid distribution plate 3, thus avoiding direct contact between the water absorption layer 4 and the liquid distribution plate 3 and reducing the liquid loss. The edge of the extension plate 6 in contact with the water absorption layer 4 is set to be wavy. On the one hand, it can reduce the contact area between the extension plate 6 and the water absorption layer 4 and the area where the liquid flows to the extension plate 6. On the other hand, the wavy area of the extension plate 6 is smoother, making the pressure on the water absorption layer 4 more uniform, avoiding excessive local pressure on the water absorption layer 4 causing too fast liquid loss, and overall controlling the drainage rate of the water absorption layer 4.

[0038] In some embodiments, in order to improve the dripping efficiency of the liquid on the liquid distribution plate 3, a plurality of notches 311 are spaced along the length direction of the edge of each sputtering plate 31, so that a plurality of water storage and dripping parts 312 are formed on the edge of the sputtering plate 31, enabling the liquid flowing on the back side of the sputtering plate 31 to flow into the water storage and dripping parts 312. As the liquid accumulates, the dripping efficiency of the liquid is accelerated, the uniformity of the liquid dripping area is ensured, and the wetting of the covered area of the heat preservation plate 1 is ensured.

[0039] Figure 8 The structural schematic diagram of the inner wall of the heat preservation plate 1 in a precast box girder spraying maintenance device according to an embodiment of the present invention is shown. Refer to Figure 7 and Figure 8 As shown, in some embodiments, a slider 7 with a rectangular cross-section is respectively extended at both ends of the liquid distribution plate 3, and a sliding groove 16 cooperating with the slider 7 is opened along the height direction of the inner wall of the heat preservation plate 1 in the area corresponding to the slider 7 to enable the slider 7 to slide in the sliding groove 16. When the nozzle 22 sprays the liquid, under the action of the water pressure, it will drive the liquid distribution plate 3 to displace upward, so that the extension plate 6 reciprocally presses the bottom of the water absorption layer 4. On the one hand, under the reciprocating extrusion, the internal liquid flow efficiency of the water absorption layer 4 is also accelerated, improving the uniformity of the liquid distribution. On the other hand, it can also restore the deformation space of the sponge 41 in the water absorption layer 4, ensuring the stability of the contact area between the extension plate 6 and the water absorption layer 4.

[0040] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A precast box girder spraying and curing device, characterized in that, Composed of a number of maintenance boards spliced together, the maintenance board includes A heat preservation board (1) with a cavity inside, one side of which is an opening and is in communication with the cavity inside, and the opening side is used to be buckled on the surface of the precast box girder; A number of spray heads (22) are provided and are erected in the cavity of the heat preservation board (1), and their water spraying ports are arranged towards the bottom direction of the heat preservation board (1), and each spray head (22) is in communication with an external water source; A plurality of liquid equalizing plates (3) are provided and are erected on the side of the spray head (22) facing the bottom of the heat preservation board (1), and adjacent liquid equalizing plates (3) are arranged at intervals. The liquid equalizing plate (3) is bent to form an opening, and the opening direction of the liquid equalizing plate (3) is arranged towards the spray head (22); An absorbent layer (4) is further provided at the bottom of the heat preservation board (1), and the absorbent layer (4) is in contact with the side of the liquid equalizing plate (3) departing from the opening; An extension plate (6) extends from the side of the liquid equalizing plate (3) departing from its own opening towards the bottom of the heat preservation board (1), and the side of the extension plate (6) departing from the liquid equalizing plate (3) is in contact with the absorbent layer (4).

2. The precast box girder spray curing device according to claim 1, characterized in that, The side of the extension plate (6) in contact with the absorbent layer (4) is wavy.

3. The precast box girder spraying and curing device according to claim 2, characterized in that, A plurality of notches (311) are opened along the length direction of the edge of the opening of the liquid equalizing plate (3) itself, so that the edge forms a plurality of water storage drip parts (312).

4. The precast box girder spraying and curing device according to claim 3, characterized in that, A coiled humidifying pipe (5) is fixed at the bottom of the heat preservation board (1), one end of the humidifying pipe (5) is sealed, the other end is in communication with an external water source, and a plurality of water passing holes (51) are arranged at intervals on the periphery of the humidifying pipe (5).

5. A precast box girder spraying and curing device according to claim 4, wherein, The water passing holes (51) are arranged in the direction of the humidifying pipe (5) facing the bottom wall of the heat preservation board (1).

6. The precast box girder spraying and curing device according to claim 5, characterized in that, Both ends of each liquid equalizing plate (3) are slidably connected with the inner wall of the heat preservation board (1) along the height direction of the heat preservation board (1).

7. The precast box girder spraying and curing device according to claim 6, characterized in that, A slider (7) is fixedly connected to each end of the liquid equalizing plate (3), and a chute (16) for accommodating the slider (7) to slide is opened in the inner wall of the heat preservation board (1) in the area opposite to the slider (7) along the height direction of the heat preservation board (1).

8. A precast box girder spraying and curing device according to claim 7, characterized in that, The cross section of the slider (7) is rectangular.

Images