A portable device for repairing concrete damage in universal bridge superstructures
Through the design of the lifting rod and the fixed patch panel of the electromagnet structure of the portable device, the problem of concrete falling off and corner dropping of the bottom of the bridge upper structure is solved, and a safe and efficient repair effect is achieved, reducing costs and improving portability.
Patent Information
- Application Number
- CN202421501573.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The prior art is difficult to effectively repair the problem of falling off and angle dropping of concrete on the bottom of the bridge superstructure slab, especially in river surfaces or high places, where there are problems such as difficulty in laying and operational hazards.
A portable device is designed, including a height-adjustable lifting rod and a patch plate with built-in electromagnet structure. The patch plate is fixed by electromagnetic suction and applied to its surface to adjust the lifting rod to the diseased position. After the power is cut off, the patch plate remains on the concrete for repair.
It effectively solves the problems of difficulty in building a ladder on the river surface and the danger of high-altitude operations, improves the quality of concrete falling off and corner drops, reduces the repair cost, and simplifies the portability and operating efficiency of the device.
Smart Images
Figure CN222730379U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge maintenance, in particular to a portable device for repairing the falling off and corner dropping of the bottom concrete of a universal bridge upper structure slab at a certain height in the bridge maintenance technology. Background Art
[0002] With the development of my country's economy and the improvement of the technical level of various industries, the national highway mileage has reached a new high, and the density of the transportation network is getting higher and higher. The development of bridge technology is an important part of the development of the transportation network. In order to adapt to more road conditions and environments, many bridge structures have emerged. The construction technology of bridges has made great progress, and the maintenance and upkeep of bridges during the later operation period has become a new challenge.
[0003] In order to ensure the smooth operation of the transportation network, higher requirements are put forward for bridge operation, and bridge maintenance technology is becoming more and more professional. In modern construction projects, the integrity of beam-slab concrete structures is crucial to ensure the safety and function of buildings. However, due to the influence of various internal and external factors, concrete bridges are prone to corner peeling and other defects after a period of operation. The formation of problems such as missing edges and corners and surface peeling is usually related to the following factors: the formwork is not fully moistened before pouring concrete, or the isolation agent is unevenly applied, resulting in the adhesion of concrete to the formwork, causing the concrete to fall off at the corners when the formwork is removed; removing the formwork too early or with too much force, and operations before the concrete reaches sufficient strength, may cause concrete damage at the corners. If the construction is carried out under low temperature conditions, the concrete is not fully hydrated, or it is affected by freeze-thaw cycles, it may also cause the strength of the concrete corners to decrease, resulting in shedding.
[0004] Phenomena such as missing edges and corners, and surface peeling in concrete structures not only affect the appearance of the structure, but more importantly, may have a negative impact on the stability and durability of the structure. Timely and effective repair of these damages is a necessary measure to ensure the long-term safe operation of the building. The commonly used method is to use long ladders or engineering vehicles to allow workers to approach the beams and slabs for maintenance work, but it is difficult for workers to reach them in situations far from the shore and the side of the bridge. It is difficult and dangerous to set up ladders under unstable conditions on the ship, so it is difficult to repair the concrete beams and slabs in the middle. Therefore, there is an urgent need for a repair technology for the peeling and corner dropping of the bottom concrete of the bridge superstructure slab at a certain height to meet the actual needs of general bridge superstructure concrete damage repair. Utility Model Content
[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a universal portable device for repairing concrete damage on the superstructure of a bridge, which is equipped with a lifting rod with adjustable height and cooperates with a patch plate to repair the fallen corners and falling off of concrete at a beam and slab height of 3-7m, so as to solve the problem of difficulty in setting up ladders on the river surface or the high risk factor of high-altitude operations, and reduce the repair cost.
[0006] To achieve the above-mentioned purpose, the utility model proposes a portable device for repairing concrete damage of a universal bridge superstructure, comprising:
[0007] A lifting rod, and a patch plate connected to the top of the lifting rod, the lifting rod includes a lifting rod body and a patch plate fixing component provided with an electromagnet structure, the lifting rod body includes a DC power supply, a DC wire, a sleeve and a locking structure, the DC wire is arranged inside the sleeve and connected to the DC power supply, the sleeve has multiple sections, and each section of the sleeve is connected by the locking structure, the patch plate fixing component is connected to the top of the lifting rod body, the electromagnet structure is connected to the DC wire inside the lifting rod body, the patch plate has a built-in iron sheet, and the patch plate is fixed to the top of the patch plate fixing component by electromagnetic suction, the patch plate is coated with a repair material containing an adhesive on the side facing the disease, and the patch plate includes a model A patch plate for the problem of concrete surface shedding and a model B patch plate for the problem of corner falling.
[0008] Furthermore, the surface of the Model A patch board is square, and the iron sheet is embedded in the geometric center of the surface of the Model A patch board.
[0009] Furthermore, the model B patch board is formed by splicing two identical square panels, where two sides of the same length of the square panels are spliced to form a right angle, and the iron sheet is embedded in the geometric center of any panel.
[0010] Furthermore, the patch board fixing component includes: a universal joint, an electromagnet structure, a bracket base, a movable bracket and a reset spring connected in sequence, the universal joint is connected to the top of the lifting rod body, the electromagnet structure includes a cover shell and an electromagnet built into the cover shell, the electromagnet is connected to the DC wire, the movable bracket and the reset spring are each provided with four, the reset spring is connected to the bottom of each movable bracket, and there is a 90-degree angle between every two adjacent movable brackets.
[0011] Furthermore, the repair material includes AB component epoxy mortar and an adhesive. The AB component epoxy mortar is applied to the middle position of the patch board surface to fill the defects of the concrete. The adhesive is applied to the periphery of the AB component epoxy mortar to bond the patch board to the smooth surface of the concrete.
[0012] Furthermore, the surface of the model A patch board is square, with a size of 200mm*200mm and a thickness of 5mm.
[0013] Furthermore, the model B patch board is two identical rectangular panels spliced together, with a size of 200mm*150mm, a thickness of 5mm, and spliced along an edge with a length of 200mm.
[0014] Furthermore, the total length of the lifting rod body is 6200mm, the sleeve is divided into four sections, and the length of each section is 1500mm; the electromagnet is a 22-pound electromagnet with a diameter of 30mm, a height of 20mm, and a coil structure inside; the width of each movable bracket is 40mm, and the length of a pair of movable brackets in opposite directions is 200mm, which can be stretched to 300mm.
[0015] Compared with the prior art, an embodiment disclosed in the utility model has the following beneficial effects:
[0016] (1) The utility model can replace some of the existing bridge maintenance technologies, and can replace high-risk operations such as bridge inspection vehicles or racks under bridges. By setting an adjustable height lifting rod and a built-in electromagnet structure, the patch board with a built-in iron sheet is connected to the lifting rod through electromagnetic suction. The patch board is coated with a repair material containing an adhesive. When the patch board is lifted to the defective position, the power is turned off so that the patch board remains on the beam to complete the repair work, effectively solving the problem of difficulty in setting up ladders on the river surface or high risk of high-altitude operations. The device is simple and portable, and the repair efficiency is improved.
[0017] (2) The patch board designed by the utility model is used in conjunction with the coating position of the repair material. The middle position of the patch board surface is coated with AB component epoxy mortar to fill the defects of the concrete. The adhesive is applied around the epoxy mortar to bond the patch board to the smooth surface of the concrete. The patch board bonded to the smooth concrete around the defect can effectively block the contact between the defect position and the air, which can further improve the quality of the repair;
[0018] (3) The utility model designs two patch plates of different shapes according to different diseases, which can meet the needs of repairing different diseases and repair the concrete falling off and corner falling of the bottom of the bridge superstructure slab. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the portable repair device disclosed in the utility model;
[0020] Figure 2 It is a partial structural schematic diagram of the portable repair device disclosed in the utility model;
[0021] Figure 3It is another partial structural schematic diagram of the portable repair device disclosed in the utility model;
[0022] Figure 4 It is a circuit connection diagram inside the lifting rod body disclosed in the utility model;
[0023] Figure 5 It is a schematic diagram of the structure of the model A patch board disclosed in the embodiment;
[0024] Figure 6 It is a schematic diagram of the structure of the model B patch board disclosed in the embodiment;
[0025] Figure 7 It is a schematic diagram of the overall structure of the patch board fixing component disclosed in the embodiment;
[0026] Figure 8 A bottom view of a patch board fixing component disclosed in an embodiment;
[0027] Fig. 9 A top view of a patch board fixing component disclosed in an embodiment;
[0028] Fig.10 It is a schematic diagram of the structure of the electromagnet disclosed in the embodiment.
[0029] In the figure: 1- SMD board; 11- iron sheet; 2- SMD board fixing component; 21- universal joint; 22- electromagnet structure; 23- bracket base; 24- movable bracket; 25- reset spring; 3- lifting rod body; 31- DC power supply; 32- DC wire; 33- bushing; 34- locking structure. DETAILED DESCRIPTION
[0030] The following describes the implementation of the present invention through specific examples and in combination with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0031] like Figure 1-Figure 4 As shown, the utility model discloses a portable device for repairing damage to concrete of a universal bridge superstructure, comprising:
[0032] A lifting rod, and a patch board 1 connected to the top of the lifting rod, the lifting rod includes a lifting rod body 3 and a patch board fixing component 2 provided with an electromagnet structure 22, the lifting rod body 3 includes a DC power supply 31, a DC wire 32, a sleeve 33 and a locking structure 34, the DC wire 32 is arranged inside the sleeve 33 and connected to the DC power supply 31, the sleeve 33 of the lifting rod body 3 is multi-section, and each section of the sleeve 33 is connected by a locking structure 34, the patch board fixing component 2 is connected to the top of the lifting rod body 3, the electromagnet structure 22 is connected to the DC wire 32 inside the lifting rod body 3, the patch board 1 has an iron sheet 11 built in, the patch board 1 is fixed to the top of the patch board fixing component 2 by electromagnetic attraction, the patch board 1 is coated with a repair material containing an adhesive on the side facing the disease, and the patch board 1 includes a model A patch board for the problem of concrete surface shedding and a model B patch board for the problem of corner drop.
[0033] Specifically, a thin iron sheet 11 is built into the center of the geometric position of the patch panel 1, which can be attracted by the electromagnetic force of the electromagnet mechanism 22 of the patch panel fixing component 2. This design can maintain the stability of the patch panel 1, so that the patch panel 1 will not overturn when it is lifted 3 to 6 meters. The device connects the patch panel fixing component 2 with the patch panel 1 through electromagnetic suction, so that there is no need to set up a ladder under the bridge. Instead, the patch panel 1 with the repair material is lifted to the defect position by operating the length of the lifting rod. After the adhesive in the repair material is cured and reaches the bonding force, the power is cut off, so that the patch panel fixing component and the patch panel are automatically separated, and the patch panel is left on the beam to complete the repair work. At the same time, the shape of the patch panel 1 is provided with two types to meet the needs of different diseases. It is worth noting that the DC power supply 31 includes a 12V battery and a switch, the power supply is arranged inside the sleeve 33, and the switch is arranged outside the sleeve 33. Preferably, the sleeve 33 and the locking structure 34 connected between each sleeve 33 constitute a plurality of telescopic segments for adjusting the length of the lifting rod. The locking structure is an eccentric lock, which is a circular eccentric wheel of a clamping structure, which gradually wedges the arc wedge between the workpieces. The structure includes an eccentric wheel, which moves a clamping block by rotation. The contour of the eccentric part is designed to be elliptical. When the eccentric shaft rotates, it pushes the eccentric part toward the workpiece, thereby generating a clamping force. The circular eccentric clamping mechanism has the advantages of simple operation and rapid clamping, and the mechanical principle is relatively simple. It is an existing structure and will not be described in detail here.
[0034] Furthermore, the size of the patch board 1 with the built-in iron sheet 11 can be customized according to the size of the common diseases; the shape of the patch board 1 is divided into two categories, one is a square board, and the other is two square boards vertically spliced; Figure 5As shown, the concrete surface peeling problem uses a model A patch board, the board surface of the model A patch board is square, and an iron sheet 11 is embedded in the geometric center of the board surface of the model A patch board to facilitate electromagnetic fixation. Preferably, the board surface of the model A patch board is square, the size is 200mm*200mm, and the thickness is 5mm; Figure 6 As shown, the problem of corner drop is solved by using a model B patch board. The model B patch board is two identical square panels, and the sides of the same length are spliced together to form a right angle. An iron sheet 11 is embedded in the geometric center of any panel to facilitate electromagnetic fixation. Preferably, the model B patch board is two identical rectangular panels spliced together, and the two sides of the same length of the rectangular panels are spliced together to form a right angle. The size is preferably 200mm*150mm, the thickness is 5mm, and the splicing is along the side of 200mm in length. Specifically, the iron sheet is a galvanized iron sheet.
[0035] Furthermore, the device is used in conjunction with the coating position of the repair material, which includes AB component epoxy mortar and adhesive. The AB component epoxy mortar is used to fill the defects of concrete, and this material requires high viscosity and high strength; the adhesive is used to bond the patch board to the smooth surface of the concrete, and this adhesive requires qualified bonding force and can be quickly cured; the two repair materials are used together, but in different positions. The AB component epoxy mortar is coated on the middle position of the patch board surface, and the adhesive is coated on the periphery of the epoxy mortar.
[0036] like Figure 7-Figure 9 As shown, the patch board fixing component 2 includes: a universal joint 21 connected to the lifting rod body 3, an electromagnet structure 22, a bracket base 23, a movable bracket 24 and a reset spring 25, the electromagnet structure 22 is connected to the top of the universal joint 21, the electromagnet structure 22 includes a cover and an electromagnet built in the cover, the electromagnet is connected to the DC wire 32, the bracket base 23 is connected to the electromagnet structure 22, the movable bracket 24 is connected to the bracket base 23, four movable brackets 24 and four reset springs 25 are provided, and a reset spring 25 is connected to the bottom of each movable bracket 24, and there is a 90-degree angle between each adjacent two movable brackets 24.
[0037] Specifically, the patch board 1 and the lifting rod are fixed mainly by electromagnetic attraction, and the reset spring 25 plays the role of assisting in fixing the patch board 1. When the adhesive is firmly bonded to the smooth surface of the concrete, the power is turned off, the electromagnetic force disappears, and the patch board 1 remains on the concrete surface, but the fixing force of the reset spring 25 is insufficient to separate the patch board 1 from the concrete surface; the universal joint is a hollow structure, and the DC wire passes through the universal joint to connect with the electromagnet; the cover of the electromagnet structure uses a plastic shell to reduce the significant influence on the magnetic force; Fig.10 As shown, Fig.10 (a) and Fig.10(b) are the external and internal structure diagrams of the electromagnet respectively. The electromagnet adopts a coil structure design, and an iron core made of high magnetic permeability material is placed in the electromagnet to enhance the magnetic field strength and stability of the electromagnet. In the electromagnet, a magnetic field is generated when current passes through the coil, but this magnetic field is easily dissipated because the air has a poor ability to conduct magnetic fields. The role of the iron core is to concentrate the magnetic field inside the coil, making the magnetic field lines denser and the magnetic field strength more uniform.
[0038] In a preferred embodiment of the present invention, reference Figure 1 , Figure 8 and Fig. 9 The sleeve 33 is composed of four sections, each section is 1500mm long, and the total length of the lifting rod body is 6200mm, which includes the length of the handle, on which there are a power supply and a switch; the electromagnet is preferably a 22-pound electromagnet with a diameter of 30mm and a height of 20mm; the width of each movable bracket is 40mm, and the length of each pair of movable brackets 24 is 200mm, which can be stretched to 300mm. It should be noted that any movable bracket 24 and the movable bracket 24 in the opposite direction are a pair.
[0039] Furthermore, the patch plate 1 is made of aluminum alloy plate or light PVC plate; the main body material of the lifting rod is aluminum alloy to reduce the deadweight of the rod; and the handle of the lifting rod is made of rubber to facilitate holding for a long time.
[0040] To sum up, the utility model is a portable device for repairing concrete damage of a universal bridge superstructure. The patch plate fixing component with a built-in electromagnet structure on the top of the lifting rod is connected to the patch plate with a built-in iron sheet through electromagnetic suction. The surface of the patch plate is provided with repair material. The lifting rod is adjusted to a suitable position, and the patch plate with the repair material is lifted to the defective position. After the adhesive in the repair material is cured to reach the bonding strength, the power supply is disconnected, so that the patch plate fixing component is automatically separated from the patch plate, and the patch plate is retained in the concrete structure to complete the repair work. The device can effectively improve the repair quality of concrete corner chipping and falling off at a beam and slab height of 3-7m, solve the problem that ladders cannot be set up on the river surface or the risk factor of high-altitude operations is high, reduce the repair cost, and has the advantages of being simple, portable and efficient.
[0041] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art may modify and alter the above embodiments without violating the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be as set forth in the claims.
Claims
1. A portable device for repairing concrete damage on universal bridge superstructures, characterized in that: include: A lifting rod, and a patch board (1) connected to the top end of the lifting rod, the lifting rod comprising a lifting rod body (3) and a patch board fixing component (2) provided with an electromagnet structure (22), the lifting rod body (3) comprising a DC power supply (31), a DC wire (32), a sleeve (33) and a locking structure (34), the DC wire (32) being arranged inside the sleeve (33) and connected to the DC power supply (31), the sleeve (33) being composed of multiple sections, each section of the sleeve (33) being connected via the locking structure (34), The patch plate fixing component (2) is connected to the top of the lifting rod body (3), the electromagnet structure (22) is connected to the DC wire (32) inside the lifting rod body (3), the patch plate (1) has a built-in iron sheet (11), and the patch plate (1) is fixed to the top of the patch plate fixing component (2) by electromagnetic suction, and a patch material containing an adhesive is coated on the side of the patch plate (1) facing the disease, and the patch plate (1) includes a model A patch plate for the problem of concrete surface falling off and a model B patch plate for the problem of corner falling.
2. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 1, characterized in that: The surface of the Model A patch board is square, and the iron sheet (11) is embedded in the geometric center of the surface of the Model A patch board.
3. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 1, characterized in that: The model B patch board is composed of two identical square panels spliced together, wherein two sides of the square panels of the same length are spliced together to form a right angle, and the iron sheet (11) is embedded in the geometric center of any one of the panels.
4. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 1, characterized in that: The patch board fixing component (2) comprises: a universal joint (21), an electromagnet structure (22), a bracket base (23), a movable bracket (24) and a return spring (25) connected in sequence, the universal joint (21) is connected to the top of the lifting rod body (3), the electromagnet structure (22) comprises a cover shell and an electromagnet built in the cover shell, the electromagnet is connected to the DC wire (32), the movable bracket (24) and the return spring (25) are each provided with four, the bottom of each movable bracket (24) is connected to the return spring (25), and each adjacent two movable brackets (24) are 90 degrees apart.
5. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 1, characterized in that: The repair material comprises an AB component epoxy mortar and an adhesive, wherein the AB component epoxy mortar is applied to the middle of the surface of the patch plate (1) to fill the defect of the concrete, and the adhesive is applied to the periphery of the AB component epoxy mortar to bond the patch plate (1) to the smooth surface of the concrete.
6. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 2, characterized in that: The surface of the model A patch board is square, the size is 200mm*200mm, and the thickness is 5mm.
7. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 3, characterized in that: The model B patch board is made of two identical rectangular panels with a size of 200mm*150mm and a thickness of 5mm, which are spliced along an edge with a length of 200mm.
8. A portable device for repairing damage to concrete of a universal bridge superstructure as claimed in claim 4, characterized in that: The length of the lifting rod body is 6200 mm, the sleeve (33) is divided into four sections, and the length of each section of the sleeve (33) is 1500 mm; the electromagnet is a 22-pound electromagnet with a diameter of 30 mm, a height of 20 mm, and a coil structure inside; the width of each movable bracket (24) is 40 mm, and the length of a pair of movable brackets (24) in opposite directions is 200 mm, which can be stretched to 300 mm.