A maintenance mechanism for precast bridges

Abstract

The utility model discloses a kind of maintenance mechanisms for prefabricated bridge, including support, disturbance piece is supported on the support side of support, spray pipe at the top of disturbance piece, and liquid collecting tank at the bottom of disturbance piece;Disturbance piece has multiple continuous undulating disturbance structures;Spray pipe is provided with spray head;When the spray head sprays, water body flows through disturbance structure and is dispersed and disturbed to diffuse into the air of maintenance operation interval after conversion into gaseous state, part of water body not completed conversion is collected by the liquid collecting tank;The utility model realizes temperature and humidity control by spraying water body to disturbance piece, in the flowing process of water body along disturbance piece, the guidance and obstruction of flowing through multiple continuous undulating disturbance structures on disturbance piece are dispersed, disturbed, finally in the form of tiny water molecule group escapes, and evenly diffuse into the air of maintenance operation interval, to realize the uniform promotion of ambient temperature and relative humidity, improve the maintenance quality of prefabricated bridge.

Description

Technical Field

[0001] This utility model relates to the technical field of precast bridge maintenance, and in particular to a maintenance mechanism for precast bridges. Background Technology

[0002] As an important transportation infrastructure, bridges are mainly composed of superstructure, substructure, supports, and ancillary structures. With the increasing demands for efficiency, quality, and environmental protection in modern engineering construction, prefabricated bridge construction technology has become the mainstream development direction in the industry. Compared with the traditional on-site formwork and pouring construction mode, this technology completes the segmented prefabrication of bridge components in a standardized production workshop in a prefabrication plant. After passing inspection, the components are transported to the construction site for precise assembly. This not only effectively avoids the disadvantages of on-site pouring, which is greatly affected by environmental climate and has a long construction cycle, but also achieves significant advantages in quality control and efficiency improvement through factory production, greatly shortening the overall construction cycle. Each prefabricated bridge segment must undergo strict curing procedures before leaving the factory for transport and on-site assembly.

[0003] Chinese patent CN201920356774.6 discloses a novel energy-saving electromagnetic heating steam bridge maintenance device, comprising a bridge precast component and two support platforms. Sliding frames are slidably connected to the opposing edges of the two support platforms, and two channel steel slide rails with opposite openings are welded to the top of the two sliding frames. A common fixing plate is engaged between the two channel steel slide rails, and an electric push rod is embedded in the middle of the fixing plate. Fixing blocks are bolted to the lower surface of the fixing plate near the four corners, and round rods are welded to the bottom of the fixing blocks. Tension springs are sleeved on the outer wall of the round rods, and a common load plate is fixed to the bottom of the four tension springs. This invention can lift the load plate under normal conditions to ensure a suitable distance between the bottom of the steam nozzle and the surface of the bridge precast component. When traversing special sections, this distance can be temporarily changed by controlling the electric push rod, improving flexibility.

[0004] The aforementioned patented technical solution employs heating water to a boiling state to generate high-pressure steam, which is then directly injected onto the surface of the precast bridge or the curing space via a steam nozzle to achieve the temperature and humidity environment required for the concrete hydration reaction. However, due to the direct injection of high-pressure steam, the nozzle structure and steam diffusion characteristics limit the formation of a significant temperature and humidity gradient on and inside the precast bridge surface. In areas with concentrated steam, local overheating (exceeding 80°C) and instantaneous oversaturation are prone to occur, causing a rapid increase in internal temperature stress in the concrete. In areas with insufficient steam coverage, the humidity can drop rapidly to below 90%, failing to meet the humidity requirements for the continuous hydration reaction. This drastic fluctuation and uneven distribution of temperature and humidity can easily induce plastic shrinkage cracks in the concrete, affecting the curing quality of the precast bridge. Utility Model Content

[0005] The purpose of this invention is to provide a maintenance mechanism for precast bridges that can achieve a uniform increase in ambient temperature and relative humidity, thereby improving the maintenance quality of precast bridges.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A maintenance mechanism for precast bridges includes a support frame, a disturbance member inclinedly supported on the support side of the support frame, a spray pipe located at the top of the disturbance member, and a collection tank located at the bottom of the disturbance member; the disturbance member has multiple continuously undulating disturbance structures; the spray pipe is equipped with a nozzle; when the nozzle sprays, the water flows through the disturbance structure, is dispersed and disturbed, and is converted into a gaseous state before being diffused into the air in the maintenance work area, and some of the water that has not been completely converted is collected through the collection tank.

[0008] Based on the above technical solution, the present invention can be improved as follows:

[0009] Furthermore, the disturbance component is a wave plate, the surface of which forms a continuous undulating wave surface, which is the disturbance structure, and the wave surface is alternately distributed along the height direction of the wave plate to form multiple wave peaks and troughs.

[0010] Furthermore, the spray pipe is fixed to the top of the bracket and is opposite to the top of the corrugated plate; one axial end of the spray pipe is closed, and the other axial end of the spray pipe forms an inlet for connecting to an external liquid supply device. Multiple nozzles are provided on the spray pipe, and the nozzles are arranged at equal intervals along the axial direction of the spray pipe, with the nozzles facing the corrugated plate.

[0011] Furthermore, a water-blocking cover is provided at the top of the bracket, and a cover opening is formed at the bottom of the water-blocking cover, with the spray pipe covered in the cover cavity inside the water-blocking cover.

[0012] Furthermore, the liquid collection tank is fixed at the bottom of the bracket and is opposite to the bottom of the corrugated plate. The liquid collection tank has a groove at the top and a drain port on the bottom wall for connecting to an external recycling pipeline.

[0013] Furthermore, the support includes a base plate, an upright plate, and a support plate; the upright plate is vertically connected to the base plate; the liquid collection tank is movably connected to the base plate; the lower end of the support plate is connected to the liquid collection tank; the upper end of the support plate is rotatably connected to a top box; the top box is movably connected to the upright plate; an angle is formed between the support plate and the upright plate; the corrugated plate is fixedly installed on the support plate; the spray pipe is fixedly installed on the top box; a driving component is provided on the base plate, which drives the liquid collection tank to move laterally on the base plate, and drives the top box to move vertically on the upright plate through the support plate, thereby changing the angle between the support plate and the upright plate to adjust the tilt angle of the corrugated plate accordingly.

[0014] Furthermore, the included angle between the support plate and the upright plate is in the range of 30° to 60°.

[0015] Furthermore, a first linear guide rail is provided on the base plate, and a first slider is slidably connected to the first linear guide rail, with the first slider connected to the bottom of the liquid collection tank; a second linear guide rail is provided on the vertical plate, and a second slider is slidably connected to the second linear guide rail, with the second slider connected to the top box; when the driving component rotates, it drives the liquid collection tank to move along the first linear guide rail on the base plate, and drives the top box to move along the second linear guide rail on the vertical plate through the support plate.

[0016] Furthermore, the driving component is an electric lead screw, which is mounted on the base plate, and the lead screw nut on the electric lead screw is connected to the bottom of the liquid collection tank.

[0017] Furthermore, a cavity for accommodating the spray pipe is formed inside the top box, and the connecting side of the top box is connected to the second slider of the second linear guide rail; the spray side of the top box extends above the corrugated plate, and a spray nozzle is opened on the bottom plate of the top box, through which the nozzle of the spray pipe sprays the corrugated plate.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This invention achieves temperature and humidity control by spraying water onto the disturbance component. As the water flows along the disturbance component, it is guided and blocked by multiple continuous undulating disturbance structures on the component, thus being fully dispersed and disturbed. Finally, it escapes in the form of tiny water molecule clusters and diffuses evenly into the air in the maintenance work area, thereby achieving a uniform increase in ambient temperature and relative humidity and improving the maintenance quality of precast bridges. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the maintenance mechanism used for precast bridges in Example 1;

[0022] Figure 2 This is a cross-sectional view of the maintenance mechanism used for precast bridges in Example 1;

[0023] Figure 3 This is a schematic diagram of the liquid collection tank in Example 1;

[0024] Figure 4 This is a schematic diagram of the maintenance mechanism used for precast bridges in Example 2;

[0025] Figure 5 This is a cross-sectional view of the maintenance mechanism used for precast bridges in Example 2;

[0026] Figure 6 This is a schematic diagram of the structure of the first linear guide and the electric lead screw in Embodiment 2.

[0027] The markings on the attached diagram are: 1-bracket, 101-base plate, 102-vertical plate, 103-support plate, 2-spray pipe, 3-liquid collection tank, 4-wave plate, 5-spray head, 6-water baffle, 7-drain outlet, 8-top box, 9-first linear guide rail, 10-electric lead screw, 11-second linear guide rail. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] See Figures 1 to 3 This embodiment relates to a maintenance mechanism for precast bridges, including a support 1, a disturbance member disposed on the support 1, a spray pipe 2 disposed on the top of the disturbance member for spraying liquid, and a liquid collection tank 3 disposed on the bottom of the disturbance member for collecting liquid; the disturbance member has multiple continuously undulating disturbance structures; the spray pipe 2 has a liquid inlet and a nozzle 5; the liquid collection tank 3 has a liquid outlet 7.

[0031] The side of bracket 1 facing the precast bridge is designated as the support side, which is used to tilt and fix the disturbance component. Water heated to a set temperature is supplied to the inside of spray pipe 2 by an external liquid supply device. It is sprayed onto the disturbance component through the nozzle 5 on the spray pipe 2. Under its own gravity, it flows from top to bottom along the disturbance component. When it passes through the disturbance structure on the disturbance component, it is dispersed and disturbed, escaping in the form of tiny water molecule clusters and diffusing into the surrounding air, thereby increasing the ambient temperature and relative humidity of the maintenance work area. Some of the water that has not been converted flows to the bottom of the disturbance component, is collected by the liquid collection tank 3, and is discharged from the drain port 7 of the liquid collection tank 3 into the external recycling network. The liquid supply device used in this example is a water pump.

[0032] Specifically, the support 1 is a frame structure with a right-angled triangular cross section, which is made of multiple support rods welded together. The support rods are rectangular steel. When the support 1 is installed in the maintenance work area, the inclined side of the support 1 is the support side and is opposite to the precast bridge. The disturbance component is fixedly installed on the support side of the support 1 by bolts.

[0033] The disturbance component is a wave plate 4, whose surface forms a continuous undulating wave surface. This wave surface is a disturbance structure, and the wave surface is alternately distributed along the height direction of the wave plate 4 to form multiple wave crests and troughs. The water sprayed from the spray pipe 2 can flow from top to bottom along the wave surface of the wave plate 4. When the water flows over the wave crest, it is blocked by the wave crest and the water flow is evenly spread into a thin liquid film, which not only increases the contact area between the water and the air, but also effectively slows down the downward speed of the water flow. When the water flows into the wave trough, a buffer zone can be formed briefly at the wave trough. This buffer zone can buffer part of the water and prevent the water from sliding down quickly.

[0034] In this embodiment, the synergistic effect of the wave plate 4 at the crests and troughs of the wave surface significantly prolongs the overall residence time of the water on the surface of the wave plate 4, providing sufficient time for water molecules to escape from the liquid surface. This promotes more water molecules to overcome surface tension, transform from liquid to gas, and diffuse into the surrounding air. At the same time, when the air in the maintenance work area flows through the wave plate 4, the airflow is lifted upward at the crests of the wave surface and forms tiny eddies at the troughs of the wave surface to disturb the air. This air disturbance can quickly remove the high-humidity boundary layer from the water surface, allowing fresh, low-humidity air to continuously contact the water surface. This not only ensures that the escaped water molecules can quickly diffuse into the air, but also effectively avoids stagnation due to diffusion obstruction, ultimately ensuring a stable increase in temperature and humidity in the maintenance area.

[0035] It should be noted that, depending on actual needs, a suitable wave plate 4 for converting water into a gaseous state and diffusing it into the air can be selected, such as a circular arc wave plate or a triangular wave plate; preferably, in this embodiment, the wave plate 4 is a circular arc wave plate. Compared with a triangular wave plate, the smooth curved surface of the circular arc wave plate can promote the water to slide down the curve naturally, and the water flow is continuous. The smooth curved surface of the circular arc wave plate guides the air to flow along a smooth path, and the air disturbance is gentle, avoiding excessive splashing of water.

[0036] The spray pipe 2 is a long cylindrical pipe, fixed to the top of the support 1 and opposite to the top of the corrugated plate 4. The spray pipe 2 is parallel to the length direction of the corrugated plate 4. One axial end of the spray pipe 2 is closed, and the other axial end of the spray pipe 2 forms a liquid inlet to connect to an external liquid supply device. Multiple nozzles 5 are provided on the spray pipe 2. The nozzles 5 are arranged at equal intervals along the axial direction of the spray pipe 2 and face the corrugated plate 4 so as to spray water onto the corrugated surface from the top of the corrugated plate 4. In this embodiment, the temperature of the water entering the spray pipe 2 is 60°C to 80°C.

[0037] A water baffle 6 is provided at the top of the support 1. A cavity is formed inside the water baffle 6, and an opening is formed at the bottom of the water baffle 6 that communicates with the cavity. The spray pipe 2 is covered in the cavity inside the water baffle 6 to block the water splashed up when the nozzle 5 sprays the wave plate 4.

[0038] The collection tank 3 is a long tank, fixed to the bottom of the support 1 and opposite to the bottom of the corrugated plate 4. The collection tank 3 is parallel to the length of the corrugated plate 4. The collection tank 3 has an opening at the top and a drain outlet 7 on the bottom wall to facilitate connection to the external recycling network. Some of the unconverted water flows to the bottom of the turbulence member, enters the collection tank 3 through the opening at the top of the collection tank 3 to be collected, and is discharged into the external recycling network at the drain outlet 7 of the collection tank 3.

[0039] The bottom wall of the liquid collection tank 3 slopes downward from one end to the other along its length, and the drain outlet 7 is located at the lowest point of the bottom wall of the liquid collection tank 3 so that the water in the liquid collection tank 3 can flow along the bottom wall of the liquid collection tank 3 to the drain outlet 7.

[0040] In this embodiment, temperature and humidity are controlled by spraying water onto the disturbance component. As the water flows along the disturbance component, it is guided and blocked by multiple continuous undulating disturbance structures on the disturbance component, and is fully dispersed and disturbed. Finally, it escapes in the form of tiny water molecule clusters and diffuses evenly into the air in the maintenance work area, thereby achieving a uniform increase in ambient temperature and relative humidity.

[0041] Unlike the traditional method of directly using high-temperature steam for heating and humidification in existing technologies, this embodiment does not require heating the water to the boiling point (it only needs to maintain a suitable temperature of 60℃~80℃ to promote evaporation), which can significantly reduce energy consumption. In addition, by increasing the contact area between the water and air and slowing down the water flow rate, the curing mechanism in this embodiment not only meets the need for slow heating to prevent cracking in the curing of precast bridges, but also effectively avoids the temperature gradient stress on the surface and inside of the components caused by a sudden temperature rise, preventing cracking of thin-walled and irregularly shaped components. Moreover, it can provide sufficient moisture for the hardening of the concrete of the precast bridge through stable and continuous humidification, ensuring the strength of the precast bridge and ultimately improving the overall curing quality.

[0042] Example 2

[0043] See Figure 4 and Figure 6 The difference between this second embodiment and the first embodiment lies in that the support 1 in this embodiment includes a base plate 101, a vertical plate 102, and a support plate 103; the base plate 101 is parallel to the horizontal plane, and the vertical plate 102 is vertically connected to the base plate 101; the liquid collection tank 3 is movably connected to the base plate 101, the lower end of the support plate 103 is connected to the liquid collection tank 3, and the upper end of the support plate 103 is rotatably connected to a top box 8, which is movably connected to the vertical plate 102; the base plate 101, the vertical plate 102, and the support plate 103 are shaped as follows: The support structure is a right-angled triangle, with an included angle between the support plate 103 and the vertical plate 102, ranging from 30° to 60°. The corrugated plate 4 is fixedly installed on the support plate 103, and the spray pipe 2 is fixedly installed on the top box 8. A driving component is provided on the bottom plate 101, which is used to drive the liquid collection tank 3 to move laterally on the bottom plate 101 and drive the top box 8 to move vertically on the vertical plate 102 through the support plate 103, thereby changing the included angle between the support plate 103 and the vertical plate 102 to adjust the tilt angle of the corrugated plate 4 accordingly.

[0044] A first linear guide rail 9 is provided on the base plate 101. The first linear guide rail 9 is arranged horizontally, and a first slider is slidably connected to the first linear guide rail 9. The first slider is connected to the bottom of the liquid collection tank 3. The driving component is an electric screw 10, which is mounted on the base plate 101. The screw nut on the electric screw 10 is connected to the bottom of the liquid collection tank 3. A second linear guide rail 11 is provided on the vertical plate 102. The second linear guide rail 11 is arranged vertically, and a second slider is slidably connected to the second linear guide rail 11. The second slider is connected to one side of the top box 8. When the electric screw 10 rotates, it drives the liquid collection tank 3 to move along the first linear guide rail 9 on the base plate 101 through the screw nut. It also drives the top box 8 to move along the second linear guide rail 11 on the vertical plate 102 through the support plate 103. This allows for adjustment of the tilt angle of the corrugated plate 4 to meet the maintenance needs of different types of precast bridges.

[0045] In this embodiment, the top box 8 is a rectangular box structure. The interior of the top box 8 forms a cavity to accommodate the spray pipe 2. The front side of the top box 8 is the connecting side, which is connected to the second slider of the second linear guide rail 11. The rear side of the top box 8 is the spraying side, which extends above the corrugated plate 4. The top box 8 has a spray nozzle on the bottom plate 101. The nozzle 5 of the spray pipe 2 sprays the corrugated plate 4 through the spray nozzle on the top box 8. The top box 8 has a through hole for the liquid inlet of the spray pipe 2 to connect to an external liquid supply device.

[0046] The support plate 103 is a flat plate structure. The upper end of the support plate 103 is hinged to the bottom side of the top box 8, and the lower end of the support plate 103 is hinged to one side of the liquid collection tank 3. The corrugated plate 4 is fixed to the support plate 103 by bolts.

[0047] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A maintenance mechanism for precast bridges, characterized in that, It includes a bracket, a disturbance member inclinedly supported on the support side of the bracket, a spray pipe located at the top of the disturbance member, and a liquid collection tank located at the bottom of the disturbance member; The disturbance component has multiple continuous undulating disturbance structures; the spray pipe is equipped with a nozzle; when the nozzle sprays, the water flows through the disturbance structure, is dispersed and disturbed, and is converted into a gaseous state before being diffused into the air in the maintenance work area; some of the water that has not been converted is collected through the collection tank.

2. The maintenance mechanism for precast bridges according to claim 1, characterized in that, The disturbance component is a wave plate, and the surface of the wave plate forms a continuous undulating wave surface. The wave surface is the disturbance structure, and the wave surface is alternately distributed along the height direction of the wave plate to form multiple wave peaks and troughs.

3. The maintenance mechanism for precast bridges according to claim 2, characterized in that, The spray pipe is fixed to the top of the bracket and is opposite to the top of the corrugated plate. One axial end of the spray pipe is closed, and the other axial end of the spray pipe forms an inlet for connecting to an external liquid supply device. Multiple nozzles are provided on the spray pipe, and the nozzles are arranged at equal intervals along the axial direction of the spray pipe, with the nozzles facing the corrugated plate.

4. The maintenance mechanism for precast bridges according to claim 3, characterized in that, The top of the support is provided with a water-blocking cover, and the bottom of the water-blocking cover forms a cover opening, with the spray pipe being covered in the cover cavity inside the water-blocking cover.

5. The maintenance mechanism for precast bridges according to claim 3, characterized in that, The liquid collection tank is fixed to the bottom of the bracket and is opposite to the bottom of the corrugated plate. The liquid collection tank has a groove at the top and a drain port on the bottom wall for connecting to an external recycling pipeline.

6. The maintenance mechanism for precast bridges according to claim 2, characterized in that, The support includes a base plate, an upright plate, and a support plate; the upright plate is vertically connected to the base plate; the liquid collection tank is movably connected to the base plate; the lower end of the support plate is connected to the liquid collection tank, and the upper end of the support plate is rotatably connected to a top box, which is movably connected to the upright plate; an angle is formed between the support plate and the upright plate; the corrugated plate is fixedly installed on the support plate, and the spray pipe is fixedly installed on the top box; a driving component is provided on the base plate, which drives the liquid collection tank to move laterally on the base plate, and drives the top box to move vertically on the upright plate through the support plate, thereby changing the angle between the support plate and the upright plate to adjust the tilt angle of the corrugated plate accordingly.

7. The maintenance mechanism for precast bridges according to claim 6, characterized in that, The included angle between the support plate and the upright plate is in the range of 30° to 60°.

8. The maintenance mechanism for precast bridges according to claim 7, characterized in that, The base plate is provided with a first linear guide rail, and a first slider is slidably connected to the first linear guide rail. The first slider is connected to the bottom of the liquid collection tank. The vertical plate is provided with a second linear guide rail, and a second slider is slidably connected to the second linear guide rail. The second slider is connected to the top box. When the driving component rotates, it drives the liquid collection tank to move along the first linear guide rail on the base plate, and drives the top box to move along the second linear guide rail on the vertical plate through the support plate.

9. The maintenance mechanism for precast bridges according to claim 8, characterized in that, The driving component is an electric lead screw, which is mounted on the base plate, and the lead screw nut on the electric lead screw is connected to the bottom of the liquid collection tank.

10. The maintenance mechanism for precast bridges according to claim 9, characterized in that, The top box has a cavity inside to accommodate the spray pipe. The connecting side of the top box is connected to the second slider of the second linear guide. The spray side of the top box extends above the corrugated plate. The top box has a spray nozzle on the bottom plate. The nozzle of the spray pipe sprays the corrugated plate through the spray nozzle on the top box.

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