A maintenance shed for maintaining a special-shaped prefabricated bridge

Abstract

The utility model discloses a kind of maintenance sheds for maintaining special-shaped prefabricated bridge, including the shed frame main body of the maintenance chamber formed inside, the maintenance station is arranged in maintenance chamber, and multiple spray columns are arranged in the maintenance station opposite two sides and can move along X axis, Y axis, the spray head that can reciprocate along Z axis and spray bridge component is set on the spray column, the spray head is connected with external liquid supply device;The utility model spray column can be bidirectional movement along X axis, Y axis and form the coordinate adjustment system in horizontal plane, can make spray column cover arbitrary horizontal position in maintenance station, can be close to bridge component surface by adjusting spray head, avoid the problem that spray distance is too far or too close due to bridge component size difference;By setting spray head on spray column, spray head can reciprocate along Z axis and expand spray range from plane to three-dimensional space, can eliminate the problem that spray liquid is unevenly distributed on bridge component surface due to gravity.

Description

Technical Field

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

[0002] Precast bridges have been widely used in bridge engineering due to their ability to significantly improve bridge construction efficiency. During construction, the overall structure of such bridges is first disassembled into multiple bridge components for prefabrication in a factory. These prefabricated components then undergo specialized curing to ensure their strength, durability, and other mechanical properties meet the requirements for subsequent assembly and use.

[0003] Chinese patent CN201821661513.7 discloses a steam curing shed for precast box girders. Specifically, it includes a shed shell, which is enclosed on three sides, with ventilation holes on the right side and a front door on the front. The front door is connected to the shed shell via hinges. An upper slide rail is installed on the lower side of the shed, and a lower slide rail is installed below it. The precast box girder to be cured is placed inside the shed. Steam pipes are arranged sequentially on the top, bottom, left, and right sides of the precast box girder. The bottom of the precast box girder serves as a beam-making platform. Utilizing the advantages of fiberglass's good heat insulation and sealing properties, energy consumption can be reduced and curing efficiency improved.

[0004] The technical content of the aforementioned patent describes a fixed arrangement of steam pipes for maintenance, which can only achieve maintenance coverage for conventional long and narrow bridge components (such as precast box girders). With the increasing complexity of bridge engineering, various irregularly shaped components have appeared in bridge structures, such as C-shaped components at bridge bends and Y-shaped components at junctions. For these irregularly shaped components, due to their irregular outlines and large variations in spatial dimensions, the fixedly arranged steam pipes cannot adjust the spraying distance between themselves and the surface of the bridge component according to the actual geometry of the component. This results in some areas being under-maintained due to the steam pipes being too far away, while other areas are over-maintained due to the steam pipes being too close. This not only fails to guarantee the quality of maintenance but may also cause damage to the bridge component structure due to localized overheating or excessive humidity, severely limiting the applicability of this maintenance equipment. Utility Model Content

[0005] The purpose of this invention is to provide a maintenance shed for the maintenance of irregularly shaped precast bridges, which can adjust the spraying spacing according to the geometry of the bridge components, thereby adapting to the maintenance needs of irregularly shaped bridge components.

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

[0007] A maintenance shed for the maintenance of irregularly shaped precast bridges includes a main frame that forms a maintenance chamber inside. The maintenance chamber is provided with maintenance workstations and multiple spray columns arranged on opposite sides of the maintenance workstations and movable along the X-axis and Y-axis. The spray columns are provided with spray heads that can reciprocate along the Z-axis to spray bridge components. The spray heads are connected to an external liquid supply device.

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

[0009] Furthermore, the top of the curing chamber is provided with a first guide structure on both sides, and the first guide structure is connected to the top of the spray column to guide the spray column to move along the X-axis.

[0010] Furthermore, the first guide structure includes a first guide rail parallel to the X-axis in the length direction, and a plurality of suspension brackets slidably connected to the first guide rail; each suspension bracket includes a base plate and hanging arms disposed on opposite sides of the base plate; the base plate is connected to the top of the spray column; the top of the hanging bracket has a suspension part, and the hanging arm is provided with a hanging wheel and a driving member driving the hanging wheel on the suspension part. The hanging wheel and the first guide rail are slidably connected. Driven by the driving member, the hanging wheel can roll along the first guide rail, so that the suspension bracket drives the spray column to move along the X-axis.

[0011] Furthermore, each of the first guide structures has two first guide rails, which are arranged at intervals; each suspension frame has four hanging arms, which are arranged in pairs on opposite sides of the base plate, wherein the hanging wheels on two hanging arms are slidably connected to one first guide rail, and the hanging wheels on the other two hanging arms are slidably connected to another first guide rail.

[0012] Furthermore, the suspension section of each of the hanging arms consists of a hanging section and a transition section; the hanging wheel is rotatably mounted on the hanging section, which is eccentrically arranged on one side of the vertical extension line of the hanging arm, so that the center of gravity of the hanging wheel mounted on the hanging pipe section is located on the vertical extension line of the hanging arm; the transition section connects the hanging section and the top of the hanging arm, and the transition section forms a downward inclined clearance surface on the side facing the first guide rail, reserving space for the first guide rail to move through.

[0013] Furthermore, the pulley is rotatably connected to the suspension section of the suspension unit via a connecting shaft. A baffle is provided at the end of the connecting shaft away from the suspension pipe section. The baffle can stop the pulley from sliding against the outside of the first guide rail when it is in sliding engagement with the first guide rail.

[0014] Furthermore, the base plate of the suspension frame is connected to the top of the spray column via a second guide structure; the second guide structure includes a connecting frame, a first electric lead screw and a second guide rail mounted on the connecting frame; one end of the connecting frame is fixedly connected to the base plate of the suspension frame, and the other end of the connecting frame forms a connecting part; the first electric lead screw and the second guide rail are fixedly mounted on the connecting part of the connecting frame; the first lead screw nut of the first electric lead screw and the slider of the linear guide rail are both fixedly connected to the top of the spray column; driven by the first electric lead screw, the spray column can move along the Y-axis direction under the guidance of the linear guide rail.

[0015] Furthermore, the spray column includes a column body, a movable lifting part is provided on the column body, and a spray head is provided on the lifting part; a third guide structure is provided between the column body and the lifting part, the third guide structure is used to guide the lifting part to move up and down on the column body, so as to drive the spray head to move along the Z-axis direction.

[0016] Furthermore, the third guiding structure includes a second electric lead screw and two guide rods; the two guide rods are vertically installed inside the main body, and a sliding sleeve is slidably connected to the guide rod, which is connected to the lifting part; the second screw of the second electric lead screw is rotatably installed inside the column, and the second screw is parallel to the Z-axis, and the second lead screw nut is connected to the lifting part; the second lead screw motor is fixedly connected to the top of the column through a connecting box, and the output end of the second lead screw motor is connected to a gearbox, the output end of the gearbox passing through the main body to drive the second screw; the first lead screw nut of the first electric lead screw and the slider of the linear guide rail are both fixedly connected to the connecting box at the top of the spray column; driven by the second electric lead screw, the lifting part can move along the Z-axis direction under the guidance of the two guide rods.

[0017] Furthermore, the column portion is provided with a caster wheel at its bottom end, and the caster wheel is in contact with the ground.

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

[0019] This invention features a spray column installed within a curing chamber formed inside the main structure of the scaffold. This spray column can move bidirectionally along the X and Y axes, creating a coordinate adjustment system in a horizontal plane. This allows the spray column to cover any horizontal position within the curing station. Regardless of whether the bridge component is elongated, block-shaped, or irregularly shaped, the spray head can be adjusted to be close to the surface of the bridge component, avoiding problems of excessively far or close spraying distances due to differences in the size of the bridge components. Furthermore, by installing spray heads on the spray column, the spray heads can reciprocate along the Z-axis, expanding the spraying range from a planar plane to a three-dimensional space. This eliminates the problem of uneven distribution of spray liquid on the surface of the bridge components due to gravity, ensuring uniform curing. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the structure of the maintenance shed used for the maintenance of irregularly shaped precast bridges in the embodiment;

[0022] Figure 2 This is a schematic diagram of the connection between the first guide structure and the top of the spray column in the embodiment;

[0023] Figure 3 for Figure 2 Enlarged view of section A in the image;

[0024] Figure 4 For reality Figure 2 Enlarged view of section B in the image;

[0025] Figure 5 This is a schematic diagram of the spray column in this embodiment;

[0026] Figure 6 For reality Figure 5 A magnified view of section C in the image.

[0027] The markings on the attached diagram are as follows: 1. Main frame; 101. Support frame; 102. Top plate; 103. Side plate; 2. Spray column; 201. Column part; 202. Lifting part; 3. Spray head; 4. First guide rail; 5. Suspension frame; 501. Base plate; 502. Hanging arm; 5021. Hanging section; 5022. Transition section; 6. Hanging wheel; 7. Servo motor; 8. Connecting shaft; 9. Baffle; 10. Connecting frame; 11. First electric lead screw; 12. Second guide rail; 13. Second electric lead screw; 14. Guide rod; 15. Connecting rod; 16. Clamping block; 1601. First contraction joint; 1602. Second contraction joint; 17. Spray pipe; 18. Universal wheel; 19. Connecting box. 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] See Figures 1 to 6This embodiment relates to a maintenance shed for the maintenance of irregularly shaped precast bridges, including a shed body 1 and multiple spray columns 2 that can move along the X-axis and Y-axis, arranged inside the shed body 1; the spray columns 2 have spray heads 3 that can move along the Z-axis, and the spray heads 3 are connected to an external liquid supply device through pipes; the shed body 1 forms a maintenance chamber for accommodating bridge components; during maintenance, the spray columns 2 can move along the X-axis and Y-axis respectively in the maintenance chamber inside the shed body 1, and the spray heads 3 on the spray columns 2 can move along the Z-axis direction to spray and maintain bridge components with different shapes and structures.

[0030] It should be noted that in this embodiment, the length direction of the bridge component housed in the curing chamber is the X-axis, the width direction of the bridge component is the Y-axis, and the thickness direction of the bridge component is the Z-axis.

[0031] Specifically, the main body 1 of the scaffold is a rectangular scaffold structure, including a support frame 101, a top plate 102 and a side plate 103 covering the support frame 101; the support frame 101 forms scaffold openings on both sides in the length direction to facilitate the placement of bridge components into the main body 1 of the scaffold, and is located in the middle of the curing chamber inside the main body 1 of the scaffold. After placement, the length direction of the bridge component is parallel to the length direction of the main body 1 of the scaffold. At this time, the middle of the curing chamber is the curing station, and multiple spray columns 2 are arranged on opposite sides of the curing station; during curing, the spray columns 2 move along the X-axis and Y-axis respectively to approach the bridge component, and the spray heads 3 on the spray columns 2 move back and forth along the Z-axis to spray the bridge component.

[0032] The main body 1 of the shed has a first guide structure on both sides of the top of the curing chamber. The first guide structure is connected to the top of the spray column 2 so as to guide the spray column 2 to move along the X-axis.

[0033] The first guide structure includes a first guide rail 4 and multiple suspension brackets 5 slidably connected to the first guide rail 4; the first guide rail 4 is an elongated guide rail; the first guide rail 4 is fixedly installed on the top of the curing chamber by a connecting rod, and the length direction of the first guide rail 4 is parallel to the X-axis; each suspension bracket 5 includes a base plate 501 and hanging arms 502 arranged on opposite sides of the base plate 501; the base plate 501 is connected to the top of the spray column 2; the top of the hanging arm 502 extends vertically upward and forms a suspension part, and the hanging arm 502 is provided with a hanging wheel 6 and a driving member driving the hanging wheel 6 on the suspension part. The hanging wheel 6 is slidably connected to the first guide rail 4. Driven by the driving member, the hanging wheel 6 can roll along the first guide rail 4, so that the suspension bracket 5 drives the spray column 2 to move.

[0034] In this embodiment, each first guide structure has two first guide rails 4, which are arranged at intervals. In this embodiment, each suspension frame 5 has four hanging arms 502, which are arranged in pairs on opposite sides of the base plate 501. A connecting beam is connected between the bottom ends of two hanging arms 502 on the same side of the base plate 501, and the connecting beam is fixedly connected to the base plate 501. The hanging wheels 6 on two hanging arms 502 are slidably connected to one first guide rail 4, and the hanging wheels 6 on the other two hanging arms 502 are slidably connected to another first guide rail 4, forming four suspension points on the suspension frame 5. The four suspension points are symmetrically distributed, which evenly distributes the load of the suspension frame 5 to each hanging arm 502 and hanging wheel 6, ensuring that each first guide rail 4 and each hanging wheel 6 bears the same load, effectively offsetting the lateral eccentric force that occurs during operation, preventing the suspension frame 5 from tilting or jamming due to local overload or force deviation, and ensuring the stability of the operating posture.

[0035] Each suspension section of the hanging arm 502 consists of a hanging section 5021 and a transition section 5022. The hanging section 5021 is a vertical plate structure, and the hanging wheel 6 is rotatably mounted on the hanging section 5021. The hanging section 5021 is eccentrically arranged on one side of the vertical extension line of the hanging arm 502, so that the center of gravity of the hanging wheel 6 mounted on the hanging pipe section is located on the vertical extension line of the hanging arm 502. At this time, the vertically downward gravity on the hanging arm 502 is collinear with the upward tension at the suspension point, and there is no lateral eccentric moment. The hanging arm 502 can maintain a vertical posture, ensuring the operation of the suspension frame 5. The transition section 5022 connects the hanging section 5021 and the top of the hanging arm 502. The cross-section of the transition section 5022 gradually increases from the hanging section 5021 to the top of the hanging arm 502, so that the hanging section 5021 can smoothly transition to the top of the hanging arm 502. The transition section 5022 forms a downward inclined avoidance surface on the side facing the first guide rail 4, which reserves space for the first guide rail 4 to move and pass through, avoids interference between the hanging arm 502 and the first guide rail 4 when it moves, and ensures that the hanging arm 502 runs along the first guide rail 4 without jamming or collision.

[0036] In this embodiment, the driving component is a servo motor 7, which is fixedly mounted on one of the hanging arms 502 and drives the connecting wheel 6. The wheel 6 is rotatably connected to the hanging section 5021 of the suspension part via a connecting shaft 8. A baffle 9 is provided at the end of the connecting shaft 8 away from the hanging pipe section. The baffle 9 is a circular plate structure. When the wheel 6 and the first guide rail 4 are in sliding engagement, the baffle 9 can stop the wheel 6 from moving outward from the first guide rail 4, thus limiting the displacement range of the wheel 6 to the outside of the first guide rail 4 in space. When the wheel 6 tends to detach from the guide rail, the baffle 9 can contact the outer edge of the first guide rail 4 and form a rigid block, constraining the wheel 6 within the effective contact range of the guide rail, preventing the wheel 6 from moving outward due to vibration or off-center load, and effectively avoiding derailment. At the same time, because there is a gap between the baffle 9 and the wheel 6, interference with the normal rotation of the wheel 6 is avoided.

[0037] The base plate 501 of the suspension frame 5 is connected to the top of the spray column 2 via a second guide structure; the second guide structure includes a connecting frame 10, a first electric lead screw 11 and a second guide rail 12 mounted on the connecting frame 10; one end of the connecting frame 10 is fixedly connected to the base plate 501 of the suspension frame 5, and the other end of the connecting frame 10 extends parallel to the Y-axis toward the maintenance station and forms a connecting part; the first electric lead screw 11 and the second guide rail 12 are fixedly mounted on the connecting part of the connecting frame 10; the first electric lead screw 11 has a first screw, which is threadedly connected to the first... The system includes a first lead screw nut on a screw and a first lead screw motor that drives the first lead screw to rotate; a second guide rail 12 is a linear guide rail, which has a guide rail body and a slider that slides on the guide rail body; the first screw of the first electric lead screw 11 and the guide rail body of the linear guide rail are both parallel to the Y-axis direction; the first lead screw nut of the first electric lead screw 11 and the slider of the linear guide rail are both fixedly connected to the top of the spray column 2; driven by the first electric lead screw 11, the spray column 2 can move along the Y-axis direction under the guidance of the linear guide rail.

[0038] The spray column 2 includes a column body 201, a movable lifting part 202 is provided on the column body 201, and a spray head 3 is provided on the lifting part 202; a third guide structure is provided between the column body 201 and the lifting part 202, the third guide structure is used to guide the lifting part 202 to rise and fall on the column body 201, so as to drive the spray head 3 to move along the Z-axis direction.

[0039] The third guiding structure includes a second electric lead screw 13 and two guide rods 14. The second electric lead screw 13 has a second screw, a second lead screw nut threaded onto the second screw, and a second lead screw motor that drives the second screw to rotate. A receiving cavity is formed inside the column portion 201. The two guide rods 14 are vertically installed inside the main body, and a sliding sleeve is slidably connected to the guide rod 14, which is connected to the lifting part 202. The second screw of the second electric lead screw 13 is rotatably installed inside the column portion 201, and the second screw is parallel to the Z-axis. The second lead screw nut is connected to the lifting part 202. The second lead screw motor is fixedly connected to the top of the column portion 201 through a connecting box 19. The output end of the second lead screw motor is connected to a gearbox, and the output end of the gearbox passes through the main body to drive the second screw. The first lead screw nut of the first electric lead screw 11 and the slider of the linear guide rail are both fixedly connected to the connecting box 19 at the top of the spray column 2. Driven by the second electric lead screw 13, the lifting part 202 can move along the Z-axis direction under the guidance of the two guide rods 14.

[0040] A connecting rod 15 is provided on the lifting unit 202. The connecting rod 15 is arranged horizontally and has multiple clamping blocks 16. A spray pipe 17 is clamped on the clamping block 16. The clamping end of the spray pipe 17 is connected to an external liquid supply device through a pipe, and the end of the spray pipe 17 is connected to a spray head 3. The clamping block 16 has a rectangular block structure and has a first clamping cavity and a second clamping cavity. The central axes of the first clamping cavity and the second clamping cavity are perpendicular to each other in space. The first clamping cavity forms a first contraction slit 1601 on the top surface of the clamping block 16, and the second clamping cavity forms a second contraction slit 1601 on the bottom surface of the clamping block 16. Contraction joint 1602; clamping blocks 16 have first bolts locked into the top of opposite sides. When the first bolts are tightened, the first clamping cavity contracts to clamp the connecting rod 15; clamping blocks 16 have second bolts locked into the bottom of opposite sides. When the second bolts are tightened, the second clamping cavity contracts to clamp the spray pipe 17; depending on the actual situation, a clamping device suitable for fixing the spray pipe 17 of the connecting spray head 3 to the lifting part 202 can also be used instead. The number of clamping blocks 16 corresponds to the number of spray heads 3 to be installed; in this embodiment, the spray head 3 is an atomizing spray head 3.

[0041] The column 201 is provided with a caster wheel 18 at the bottom end, and the caster wheel 18 is in contact with the ground. The caster wheel 18 serves as an intermediate carrier, which can evenly transfer the vertical load of the spray column 2 to the ground. The static friction between the wheel and the ground maintains the stability of the column when it is stationary. Moreover, the caster wheel 18 can turn accordingly as the spray column 2 moves, so as to facilitate the adjustment of the position of the spray column 2.

[0042] In this embodiment, the liquid supply device is a water tank and a water pump as in the prior art. The water tank is equipped with a heater that can heat the water. The input end of the water pump is connected to the outlet of the water tank, and the output end of the water pump is connected to the spray pipe 17 through a pipe. When the water is heated to the set temperature by the heater, it is delivered to the spray pipe 17 by the water pump and sprayed out after being atomized by the spray head 3.

[0043] In practice, the bridge components to be maintained are placed in the maintenance station inside the main body of the scaffolding via a movable support platform. According to the geometric dimensions of the bridge components, the spray column 2 moves along the X-axis and Y-axis respectively to get closer to the bridge components. The external liquid supply device supplies liquid to the spray pipe 17, which is then atomized by the spray head 3 and sprayed out for maintenance. During the maintenance process, the lifting part 202 of the spray column 2 can drive the spray head 3 to move back and forth along the Z-axis.

[0044] The bidirectional movement of the spray column 2 along the X and Y axes constitutes a coordinate adjustment system in the horizontal plane, allowing the spray column 2 to cover any horizontal position within the maintenance station. Regardless of whether the bridge component is long, blocky, or irregularly shaped, the spray head 3 can be adjusted to be close to the surface of the bridge component, avoiding the problem of excessively far or close spraying distances caused by differences in the size of the bridge components. The reciprocating movement of the spray head 3 along the Z axis expands the spraying range from a plane to a three-dimensional space. Through the continuous up and down movement of the spray head 3, the atomized liquid can evenly cover the entire surface of the bridge component. Compared with fixed-height spraying, the reciprocating up and down movement can eliminate the problem of uneven distribution of spray liquid on the surface of the bridge component due to gravity, ensuring uniformity of maintenance.

[0045] 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 shed for the maintenance of irregularly shaped precast bridges, characterized in that, The system includes a main frame that forms a curing chamber, a curing station inside the curing chamber, and multiple spray columns arranged on opposite sides of the curing station that can move along the X and Y axes. Each spray column is equipped with a spray head that can reciprocate along the Z axis to spray the bridge components. The spray head is connected to an external liquid supply device.

2. The maintenance shed for precast bridges of irregular shapes according to claim 1, characterized in that, The top of the curing chamber is provided with a first guide structure on both sides. The first guide structure is connected to the top of the spray column to guide the spray column to move along the X-axis.

3. The maintenance shed for precast bridges of irregular shapes according to claim 2, characterized in that, The first guide structure includes a first guide rail parallel to the X-axis in the length direction, and a plurality of suspension brackets slidably connected to the first guide rail; each suspension bracket includes a base plate and hanging arms disposed on opposite sides of the base plate; the base plate is connected to the top of the spray column; the top of the hanging arm has a suspension part, and the hanging arm is provided with a hanging wheel and a driving member driving the hanging wheel on the suspension part. The hanging wheel and the first guide rail are slidably connected. Driven by the driving member, the hanging wheel can roll along the first guide rail, so that the suspension bracket drives the spray column to move along the X-axis.

4. The maintenance shed for precast bridges of irregular shapes according to claim 3, characterized in that, Each of the first guide structures has two first guide rails, which are arranged at intervals. Each suspension frame has four hanging arms, which are arranged in pairs on opposite sides of the base plate. The hanging wheels on two hanging arms are slidably connected to one first guide rail, and the hanging wheels on the other two hanging arms are slidably connected to the other first guide rail.

5. The maintenance shed for precast bridges of irregular shapes according to claim 4, characterized in that, Each of the aforementioned hanging arms has a suspension section consisting of a hanging section and a transition section; the hanging wheel is rotatably mounted on the hanging section, which is eccentrically arranged on one side of the vertical extension line of the hanging arm, so that the center of gravity of the hanging wheel mounted on the hanging pipe section is located on the vertical extension line of the hanging arm; the transition section connects the hanging section and the top of the hanging arm, and the transition section forms a downward sloping clearance surface on the side facing the first guide rail, reserving space for the first guide rail to move through.

6. The maintenance shed for prefabricated bridges of irregular shape according to claim 5, characterized in that, The pulley is rotatably connected to the suspension section of the suspension unit via a connecting shaft. A baffle is provided at the end of the connecting shaft away from the suspension pipe section. The baffle can stop the pulley from sliding against the outside of the first guide rail when the pulley and the first guide rail are in sliding engagement.

7. The maintenance shed for precast bridges of irregular shapes according to claim 6, characterized in that, The base plate of the suspension frame is connected to the top of the spray column via a second guide structure. The second guide structure includes a connecting frame, a first electric lead screw, and a second guide rail mounted on the connecting frame. One end of the connecting frame is fixedly connected to the base plate of the suspension frame, and the other end of the connecting frame forms a connecting part. The first electric lead screw and the second guide rail are fixedly installed on the connecting part of the connecting frame. The first lead screw nut of the first electric lead screw and the slider of the linear guide rail are both fixedly connected to the top of the spray column. Driven by the first electric lead screw, the spray column can move along the Y-axis under the guidance of the linear guide rail.

8. The maintenance shed for precast bridges of irregular shapes according to claim 7, characterized in that, The spray column includes a column body, a movable lifting part disposed on the column body, and a spray head disposed on the lifting part; a third guide structure is disposed between the column body and the lifting part, the third guide structure is used to guide the lifting part to move up and down on the column body, so as to drive the spray head to move along the Z-axis direction.

9. The maintenance shed for precast bridges of irregular shapes according to claim 8, characterized in that, The third guiding structure includes a second electric lead screw and two guide rods; the two guide rods are vertically installed inside the main body, and a sliding sleeve is slidably connected to the guide rod, which is connected to the lifting part; the second screw of the second electric lead screw is rotatably installed inside the column, and the second screw is parallel to the Z-axis, and the second lead screw nut is connected to the lifting part; the second lead screw motor is fixedly connected to the top of the column through a connecting box, and the output end of the second lead screw motor is connected to a gearbox, the output end of the gearbox passing through the main body to drive the second screw; the first lead screw nut of the first electric lead screw and the slider of the linear guide rail are both fixedly connected to the connecting box at the top of the spray column; driven by the second electric lead screw, the lifting part can move along the Z-axis direction under the guidance of the two guide rods.

10. The maintenance shed for prefabricated bridges of irregular shape according to claim 9, characterized in that, The column is equipped with casters at its bottom end, and the casters are in contact with the ground.

Images