A prefabricated box girder maintenance device

Abstract

The utility model discloses a prefabricated box girder maintenance device, including base, be located on the rotating drive mechanism of base, the horizontal carousel of rotating drive mechanism drive, the motion conversion mechanism of input end eccentric connection with horizontal carousel through radial adjusting mechanism, two groups of symmetrical settings and the output of motion conversion mechanism articulated hinge's scissor folding frame, and the spraying mechanism of connection between two groups of scissor folding frame, motion conversion mechanism will horizontal carousel rotary motion convert for horizontal reciprocating motion, drive scissor folding frame reciprocating telescopic along the length direction of box girde, radial adjusting mechanism can adjust the eccentric distance of motion conversion mechanism input end, the utility model discloses realized the reciprocating spraying maintenance of automation, range adjustable in the length direction of box girder inner cavity, has improved the maintenance quality and construction efficiency of prefabricated box girder significantly, and the scope is wide, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of concrete curing technology, and in particular to a precast box girder curing device. Background Technology

[0002] In bridge construction, precast box girders are key components, and their structural strength and durability directly affect the overall quality and service life of the bridge. After the precast box girders are cast, strict curing operations are required, especially the inner cavity of the box girder. Due to its strong sealing and special spatial structure, improper curing can easily cause cracks due to the rapid evaporation of concrete moisture, leading to a decrease in structural strength and seriously affecting the safety of the project.

[0003] Currently, the curing of the inner cavity of precast box girders is mostly done manually using handheld sprayers or fixed sprayers. Manual spraying is not only labor-intensive and inefficient, but also prone to uneven spraying and blind spots due to differences in human operation. Fixed sprayers are mostly spray pipes that are fixedly installed inside the box girder cavity, but their spray range is fixed and it is difficult to adapt to changes in the size of the box girder cavity. When different sizes of box girders need to be cured, the pipes need to be re-laid, which is time-consuming and labor-intensive, increasing equipment costs and operational complexity. Utility Model Content

[0004] The purpose of this utility model is to provide a precast box girder curing device to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A precast box girder maintenance device includes a base, a rotary drive mechanism mounted on the base, a horizontal turntable driven by the rotary drive mechanism, a motion conversion mechanism whose input end is eccentrically connected to the horizontal turntable via a radial adjustment mechanism, two sets of symmetrically arranged scissor telescopic frames whose ends are hinged to the output ends of the motion conversion mechanism, and a spraying mechanism connected between the two sets of scissor telescopic frames. The motion conversion mechanism converts the rotational motion of the horizontal turntable into horizontal reciprocating motion, driving the scissor telescopic frames to reciprocate and extend along the length of the box girder. The radial adjustment mechanism can adjust the eccentric distance of the input end of the motion conversion mechanism.

[0006] Preferably, the motion conversion mechanism includes: a connecting rod with one end hinged to a radial adjustment mechanism, a reciprocating crossbar rotatably connected to the other end of the connecting rod in the middle, sliding sleeves respectively disposed at both ends of the reciprocating crossbar, a sliding rod horizontally passing through the sliding sleeves, and a vertical rod connecting the end of the sliding rod to the base, wherein the sliding direction of the sliding sleeve on the sliding rod is perpendicular to the reciprocating crossbar; the first middle hinge point at the head end of the scissor lift telescopic frame is hinged to the sliding sleeve, and the middle intersection point adjacent to the first middle hinge point is hinged to the sliding rod.

[0007] Preferably, the radial adjustment mechanism includes: a groove extending radially along the turntable, a slider slidably disposed in the groove, an adjustment block fixedly connected to the slider, a connecting shaft fixedly connected to the end of the adjustment block away from the slider, and a driving member for driving the slider to slide in the groove, wherein the connecting rod is rotatably connected to the connecting shaft.

[0008] Preferably, the driving component includes: an adjusting threaded rod threaded through the adjusting block, and a fixed block fixedly disposed on the turntable and rotatably engaged with the adjusting threaded rod.

[0009] Preferably, the spraying mechanism includes: multiple parallel fixed rods fixedly connected between two sets of scissor telescopic frames, multiple spray pipes installed on the fixed rods, a number of nozzles arranged along the length of the spray pipes, and a flexible connecting pipe connecting adjacent spray pipes.

[0010] Preferably, the spray pipe is an arc-shaped pipe, and multiple spray pipes are connected in series with corrugated hoses through a tee connector to form a water supply passage. The water inlet of the tee connector of the first spray pipe is connected to the water supply pipe through the corrugated pipe, and a plug is installed on the water outlet of the tee connector of the last spray pipe.

[0011] Preferably, a movable support frame is connected between the tail ends of the two sets of scissor lift frames. The movable support frame includes a portal frame and wheels installed at the bottom of the portal frame. The top two sides of the portal frame are respectively connected to the tail ends of the two sets of scissor lift frames. The movable support frame moves synchronously with the reciprocating motion of the scissor lift frames.

[0012] Preferably, the rotary drive mechanism includes: a drive motor and a reducer connecting the drive motor and the horizontal turntable.

[0013] The beneficial effects of this utility model through the above technical solution are as follows: 1. This utility model uses a rotary drive mechanism to drive a horizontal turntable to rotate, and a motion conversion mechanism to convert the rotary motion into horizontal reciprocating motion, which drives the scissor telescopic frame to automatically reciprocate and extend along the length of the box girder, thereby driving the spraying mechanism to perform full-coverage scanning spraying on the inner cavity of the box girder. Compared with manual operation, the spraying trajectory is precise and controllable, solving problems such as uneven spraying, blind spots in maintenance, high labor intensity, and low work efficiency, and significantly improving the integrity of maintenance. 2. This utility model can dynamically adjust the eccentric distance of the input end of the motion conversion mechanism through the radial adjustment mechanism, thereby flexibly changing the extension stroke of the scissor telescopic frame, and thus adjusting the spraying range of the spraying mechanism to adapt to the maintenance needs of the inner cavity of box girders of different lengths and sizes. There is no need to re-lay out pipelines, which improves the practicality and adaptability of the device. 3. This utility model uses multiple arc-shaped spray pipes combined with flexible connecting pipes to form a spraying mechanism. The design of the flexible connecting pipes gives the spray pipes a certain degree of flexibility and adaptability, which can adapt to the deformation of the scissor telescopic frame during reciprocating motion, ensuring the stability and reliability of the spraying system. During the synchronous telescopic motion of the arc-shaped spray pipes and the scissor telescopic frame, the evenly distributed nozzles evenly cover key areas such as the web plate, top plate connection and inner cavity corners with the reciprocating motion, improving the uniformity of spraying, reducing maintenance blind spots, and ensuring that all parts of the box girder's inner cavity are fully maintained. 4. The motion conversion mechanism of this utility model ensures that the extension direction of the scissor lift is consistent with the horizontal reciprocating motion direction through the coordinated cooperation of the connecting rod, the reciprocating crossbar and the sliding sleeve. The moving support frame supports the tail of the scissor lift through the traveling wheels and moves synchronously with the scissor lift during the reciprocating motion, which greatly improves the stability of the device during long-distance reciprocating motion, further enhances the continuity and uniformity of the spraying maintenance operation, and improves the spraying effect and maintenance quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a precast box girder curing device from the left side view. Figure 2 This is a schematic diagram of a precast box girder curing device from the left side view. Figure 3 A schematic diagram of the motion conversion mechanism of a precast box girder curing device; Figure 4 A schematic diagram of the radial adjustment mechanism of a precast box girder curing device; Figure 5 A schematic diagram of the spraying mechanism of a precast box girder curing device; Reference numerals: 1-Base, 2-Horizontal turntable, 3-Radial adjustment mechanism, 4-Motion conversion mechanism, 5-Scissor telescopic frame, 6-Spraying mechanism, 7-Connecting rod, 8-Reciprocating crossbar, 9-Sliding sleeve, 10-Sliding rod, 11-Vertical rod, 12-Slide groove, 13-Slider, 14-Adjusting block, 15-Connecting shaft, 16-Adjusting threaded rod, 17-Fixing block, 18-Fixing rod, 19-Spraying pipe, 20-Spray head, 21-T-connector, 22-Corrugated hose, 23-Gantry frame, 24-Walking wheel, 25-Drive motor, 26-Reducer, 27-Mobile support frame. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0023] like Figures 1-5 As shown, a precast box girder maintenance device includes a base 1, a rotary drive mechanism mounted on the base 1, a horizontal turntable 2 driven by the rotary drive mechanism, a motion conversion mechanism 4 whose input end is eccentrically connected to the horizontal turntable 2 via a radial adjustment mechanism 3, two sets of symmetrically arranged scissor telescopic frames 5 whose ends are hinged to the output ends of the motion conversion mechanism 4, and a spraying mechanism 6 connected between the two sets of scissor telescopic frames 5. The motion conversion mechanism 4 converts the rotational motion of the horizontal turntable 2 into horizontal reciprocating motion, driving the scissor telescopic frames 5 to reciprocate and extend along the length of the box girder. The radial adjustment mechanism 3 can adjust the eccentric distance of the input end of the motion conversion mechanism 4.

[0024] The rotary drive mechanism includes a drive motor 25 and a reducer 26 connecting the drive motor 25 and the horizontal turntable 2.

[0025] It should be noted that: the spraying mechanism 6 needs to be connected to an external water source, the drive motor 25 needs to be connected to an external power source, and the models of the drive motor 25 and the reducer 26 can be selected according to the actual situation; When using this device to cure the inner cavity of a box girder, the base 1 must first be stably fixed to the outer side of one end of the precast box girder, aligning the scissor telescopic frame 5 with the entrance to the inner cavity of the box girder. Then, according to the length of the box girder, the radial adjustment mechanism 3 is driven to change the eccentric distance at the input end of the motion conversion mechanism 4, so that the maximum extension length of the scissor telescopic frame 5 covers the entire length of the box girder. Next, the spraying mechanism 6 is connected to an external water source to check whether the water output is uniform and whether there are any leaks. After passing the inspection, the rotary drive mechanism can be started to officially begin the spraying curing work on the inner cavity of the box girder: start the drive motor... After the speed reduction and torque increase of the reducer 26, the machine 25 drives the horizontal turntable 2 to rotate at a constant speed. The radial adjustment mechanism 3 transmits the rotational motion of the turntable to the motion conversion mechanism 4. The motion conversion mechanism 4 converts the circular motion into horizontal reciprocating motion along the length of the box girder, which in turn drives the two sets of symmetrical scissor telescopic frames 5 to reciprocate synchronously. During the reciprocating extension and retraction, the spraying mechanism 6 is driven to reciprocate along the length of the box girder, so as to realize full-coverage scanning spraying of the inner cavity of the box girder, which significantly reduces labor intensity, improves work efficiency, and improves the maintenance effect of precast box girders.

[0026] like Figure 3 As shown, the motion conversion mechanism 4 includes: a connecting rod 7 with one end hinged to the radial adjustment mechanism 3, a reciprocating crossbar 8 with its middle part rotatably connected to the other end of the connecting rod 7, sliding sleeves 9 respectively disposed at both ends of the reciprocating crossbar 8, a sliding rod 10 horizontally passing through the sliding sleeves 9, and a vertical rod 11 connecting the end of the sliding rod 10 to the base 1. The sliding direction of the sliding sleeve 9 on the sliding rod 10 is perpendicular to the reciprocating crossbar 8. The first middle hinge point at the head end of the scissor lift telescopic frame 5 is hinged to the sliding sleeve 9, and the middle intersection point adjacent to the first middle hinge point is hinged to the sliding rod 10.

[0027] The working principle of the motion conversion mechanism 4 is as follows: When the horizontal turntable 2 rotates, the radial adjustment mechanism 3 with eccentricity moves in a circular motion around the center of the horizontal turntable 2, thereby driving one end of the connecting rod 7 to move in a circular motion, which in turn drives the reciprocating crossbar 8 connected to the other end of the connecting rod 7 to move. Since the sliding sleeves 9 at both ends of the reciprocating crossbar 8 can only slide horizontally along the sliding rod 10, under this constraint, the swing of the connecting rod 7 will be forcibly converted into the horizontal reciprocating linear motion of the sliding sleeves 9 on the sliding rod 10, thereby realizing the rotation of the horizontal turntable 2. The motion is transformed into a horizontal reciprocating motion along the length of the box girder; the first middle hinge point at the head end of the scissor lift frame 5 is hinged to the sliding sleeve 9, and the middle intersection point adjacent to the head end is hinged to the sliding rod 10. When the sliding sleeve 9 moves horizontally and reciprocally, it will pull or push the first middle hinge point at the head end of the scissor lift frame. Since the middle intersection point adjacent to the head end is hinged to the sliding rod 10 and the sliding rod 10 itself is fixed, the horizontal movement of the sliding sleeve 9 forces the entire scissor lift frame 5 to unfold or retract, providing motion assurance for comprehensive and uniform maintenance.

[0028] like Figure 4 As shown, the radial adjustment mechanism 3 includes: a slide groove 12 extending radially along the turntable, a slider 13 slidably disposed in the slide groove 12, an adjustment block 14 fixedly connected to the slider 13, a connecting shaft 15 fixedly connected to the end of the adjustment block 14 away from the slider 13, and a driving member for driving the slider 13 to slide in the slide groove 12, and the connecting rod 7 is rotatably connected to the connecting shaft 15.

[0029] The driving component includes: an adjusting threaded rod 16 threaded through the adjusting block 14, and a fixing block 17 fixedly mounted on the turntable and rotatably engaged with the adjusting threaded rod 16.

[0030] The working principle of the radial adjustment mechanism 3 is as follows: Since the adjusting threaded rod 16 is rotatably engaged with the fixed block 17 and the thread passes through the adjusting block 14, rotating the adjusting threaded rod 16 pushes or pulls the adjusting block 14, thereby causing the slider 13 fixed to the adjusting block 14 to slide in the radial groove 12 of the turntable. The change in the position of the slider 13 changes the eccentricity of the connecting shaft 15 fixed at the end of the adjusting block 14 relative to the rotation center of the turntable, thereby changing the eccentricity of the connecting shaft 15 and the center of the horizontal turntable 2. The change in eccentricity changes the stroke of the horizontal reciprocating motion output by the motion conversion mechanism 4. The larger the eccentricity, the longer the stroke, which can be adapted to precast box girders with longer spans; the smaller the eccentricity, the shorter the stroke, which is suitable for box girders with shorter spans. This allows the device to flexibly adapt to precast box girders of different specifications, and can meet various maintenance needs without replacing equipment or re-laying pipelines, improving the practicality and adaptability of the device, and reducing equipment costs and operational complexity.

[0031] like Figure 5 As shown, the spraying mechanism 6 includes: multiple fixed rods 18 that are parallel and fixed between two sets of scissor telescopic frames 5, multiple spray pipes 19 installed on the fixed rods 18, a number of nozzles 20 arranged along the length of the spray pipes 19, and flexible connecting pipes that connect adjacent spray pipes 19.

[0032] Preferably, the spray pipe 19 is an arc-shaped pipe, and multiple spray pipes 19 are connected in series with corrugated hose 22 through a three-way connector 21 to form a water supply passage. The water inlet of the three-way connector 21 of the first spray pipe 19 is connected to the water supply pipe through the corrugated pipe, and a plug is installed on the water outlet of the three-way connector 21 of the last spray pipe 19.

[0033] During operation, the synchronous telescopic movement of the two sets of scissor telescopic frames 5 drives the entire spraying mechanism 6 along the length of the box girder. The flexible connecting pipe allows the spray pipes 19 to adapt to the deformation of the scissor telescopic frames 5 during reciprocating motion, ensuring the stability and reliability of the spraying system. The water supply pipe supplies water to the spray pipes 19 through the corrugated pipe. The water flows through the series-connected spray pipes 19 and is evenly sprayed from the nozzles 20 arranged on the spray pipes 19. During the synchronous telescopic movement, the evenly distributed nozzles 20 evenly cover key areas such as the web, top plate connection, and inner cavity corners with the reciprocating motion, improving the uniformity of spraying, reducing maintenance blind spots, ensuring that all parts of the box girder's inner cavity are fully maintained, and improving maintenance quality. At the same time, the automated spraying method replaces manual operation, reducing labor intensity and improving maintenance efficiency.

[0034] like Figure 1 As shown, a movable support frame 27 is connected between the tail ends of the two sets of scissor lift telescopic frames 5. The movable support frame 27 includes a portal frame 23 and wheels 24 mounted on the bottom of the portal frame 23. The top two sides of the portal frame 23 are respectively connected to the tail ends of the two sets of scissor lift telescopic frames 5. The movable support frame 27 moves synchronously with the reciprocating motion of the scissor lift telescopic frames 5. The movable support frame 27 not only provides stable support for the scissor lift telescopic frames 5, but also enables the entire device to move synchronously with the reciprocating motion of the scissor lift telescopic frames 5, maintaining the relative position of the spraying mechanism 6 and the inner cavity of the box girder, further improving the spraying effect and maintenance quality.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made without departing from the spirit and scope of this utility model as defined in the appended claims.

Claims

1. A precast box girder curing device, characterized in that: The system includes a base (1), a rotary drive mechanism mounted on the base (1), a horizontal turntable (2) driven by the rotary drive mechanism, a motion conversion mechanism (4) whose input end is eccentrically connected to the horizontal turntable (2) via a radial adjustment mechanism (3), two sets of symmetrically arranged scissor telescopic frames (5) with their ends hinged to the output ends of the motion conversion mechanism (4), and a spray mechanism (6) connected between the two sets of scissor telescopic frames (5). The motion conversion mechanism (4) converts the rotational motion of the horizontal turntable (2) into horizontal reciprocating motion, driving the scissor telescopic frames (5) to reciprocate and extend along the length of the box girder. The radial adjustment mechanism (3) can adjust the eccentric distance of the input end of the motion conversion mechanism (4).

2. The precast box girder curing device according to claim 1, characterized in that: The motion conversion mechanism (4) includes: a connecting rod (7) with one end hinged to the radial adjustment mechanism (3), a reciprocating crossbar (8) with the middle part rotatably connected to the other end of the connecting rod (7), a sliding sleeve (9) respectively set at both ends of the reciprocating crossbar (8), a sliding rod (10) horizontally passing through the sliding sleeve (9), and a vertical rod (11) connecting the end of the sliding rod (10) to the base (1). The sliding direction of the sliding sleeve (9) on the sliding rod (10) is perpendicular to the reciprocating crossbar (8). The first middle hinge point at the head end of the scissor telescopic frame (5) is hinged to the sliding sleeve (9), and the middle intersection point adjacent to the first middle hinge point is hinged to the sliding rod (10).

3. The precast box girder curing device according to claim 2, characterized in that: The radial adjustment mechanism (3) includes: a groove (12) extending radially along the turntable, a slider (13) slidably disposed in the groove (12), an adjustment block (14) fixedly connected to the slider (13), a connecting shaft (15) fixedly connected to the end of the adjustment block (14) away from the slider (13), and a driving member for driving the slider (13) to slide in the groove (12), wherein the connecting rod (7) is rotatably connected to the connecting shaft (15).

4. The precast box girder curing device according to claim 3, characterized in that: The driving component includes: an adjusting threaded rod (16) threaded through the adjusting block (14), and a fixed block (17) fixedly mounted on the turntable and rotatably engaged with the adjusting threaded rod (16).

5. The precast box girder curing device according to claim 1, characterized in that: The spraying mechanism (6) includes: multiple parallel fixed rods (18) fixed between two sets of scissor telescopic frames (5), multiple spray pipes (19) installed on the fixed rods (18), a number of nozzles (20) arranged along the length of the spray pipes (19), and flexible connecting pipes connecting adjacent spray pipes (19).

6. A precast box girder curing device according to claim 5, characterized in that: The spray pipe (19) is an arc-shaped pipe. Multiple spray pipes (19) are connected in series with corrugated hose (22) through a three-way connector (21) to form a water supply passage. The inlet of the three-way connector (21) of the first spray pipe (19) is connected to the water supply pipe through a corrugated pipe. A plug is installed on the outlet of the three-way connector (21) of the last spray pipe (19).

7. A precast box girder curing device according to claim 1, characterized in that: A movable support frame (27) is connected between the tail ends of the two sets of scissor lift frames (5). The movable support frame (27) includes a portal frame (23) and a traveling wheel (24) installed at the bottom of the portal frame (23). The top two sides of the portal frame (23) are respectively connected to the tail ends of the two sets of scissor lift frames (5). The movable support frame (27) moves synchronously with the reciprocating motion of the scissor lift frames (5).

8. A precast box girder curing device according to claim 1, characterized in that: The rotary drive mechanism includes: a drive motor (25) and a reducer (26) connecting the drive motor (25) and the horizontal turntable (2).

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