A cleaning mechanism for a pre-embedded support hole of a bent cap

Abstract

The utility model provides a kind of cleaning mechanism of bent cap pre-bury support hole, belong to bridge construction technical field, including cleaning brush, cleaning brush is divided into two parts, rear end is connected male, front end is drill rod, the front end center of drill rod is provided with embedding hole, the surface of drill rod is provided with three embedding slots in circumferential array, the outside of drill rod is located between any two embedding slots and is provided with brush plate, embedding hole is detachably connected with scraper assembly or gouging assembly, scraper assembly includes first insert piece embedded in embedding slot and embedding hole, the outer surface of first insert piece is provided with flexible scraper, gouging assembly has the second insert piece of same structure with first insert piece, the outer surface of second insert piece is provided with flexible gouging hammer, solve the problem that PVC pipe is inconvenient to remove in high altitude in the prior art, and the subsequent anchor rod is difficult to fix after the hole is difficult to pull off, finally lead to the reduction of support anchoring reliability.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a cleaning mechanism for pre-embedded support holes in cap beams. Background Technology

[0002] In bridge construction, the cap beam, as a key load-bearing component at the top of the pier, requires a reliable connection to the bridge bearing through pre-embedded anchor rods. In existing technologies, PVC pipes are typically used as molds for the pre-drilled holes in the anchor rods. During the cap beam reinforcement binding stage, the PVC pipes are embedded at the designed locations, and the pipe openings are sealed with tape to prevent concrete intrusion. However, after the concrete hardens, the PVC pipes are prone to deformation and twisting due to grout compression, resulting in a tight bond between the pipe and the concrete interface, making complete removal difficult. Furthermore, the narrow working environment and limited vertical space at heights make manual removal of residual pipes inefficient and poses significant safety hazards. Additionally, the smooth surface of the PVC pipe on the inner wall of the duct after removal creates a regular interface, making it impossible to enhance the bond between the concrete and the anchor rod using conventional roughening processes, directly reducing the reliability of the subsequent bearing anchorage. These interconnected problems increase construction difficulty and cost, and pose a potential threat to the safety of the bridge structure. Therefore, there is an urgent need for an efficient, safe cleaning mechanism that can simultaneously optimize the duct interface to address the quality and efficiency bottlenecks in the pre-drilled hole treatment of existing technologies. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a cleaning mechanism for the pre-embedded support holes of the cap beam, which is used to solve the above problems.

[0004] This utility model is implemented as follows: A cleaning mechanism for pre-embedded support holes in a cap beam includes a cleaning brush, which is divided into two parts: a connecting male end at the rear end and a drill rod at the front end. An embedding hole is provided at the center of the front end of the drill rod, and three embedding grooves are arranged in a circumferential array on the surface of the drill rod. A brush plate is provided on the outer side of the drill rod between any two of the embedding grooves. A scraper assembly or a chisel assembly is detachably connected to the embedding hole. The scraper assembly includes a first insert embedded in the embedding groove and the embedding hole, and a flexible scraper is provided on the outer surface of the first insert. The chisel assembly has a second insert with the same structure as the first insert, and a flexible chisel hammer is provided on the outer surface of the second insert.

[0005] Furthermore, the brush plate includes an arc-shaped plate, which is fixedly connected to the drill rod by bolts, and the outer surface of the arc-shaped plate is provided with bristles.

[0006] Furthermore, the bristles are made of one of the following materials: steel wire, copper-plated steel wire, 304 stainless steel, or copper wire.

[0007] Furthermore, the length of the scraper assembly or the chisel assembly attached to the drill rod is 10-20cm.

[0008] Furthermore, the first insert includes a connector, one end of which is a flat surface and the other end is an arc surface. A shaft is provided at the center of the flat surface, and three embedded plates are arranged in a circumferential array along the edge of the flat surface along the shaft.

[0009] Furthermore, the outer surface of the drill rod has three locking holes a arranged in a circumferential array on the rear side, and the outer surface of the shaft has three locking holes b arranged in a circumferential array on the rear side. The shaft is inserted into the embedding groove, and the embedding plate is inserted into the embedding groove until the connector abuts against the front end of the drill rod. At this time, any one of the locking holes b is coaxial with the adjacent locking hole a, and a set of coaxial locking holes are fixed together by a hand-tightening nut.

[0010] Furthermore, the flexible scraper includes a first elastic shaft arrayed on the outside of the embedded plate, with limiting ribs connected to the embedded plate on both sides of each first elastic shaft and in the length direction of the embedded plate, and only the lower half of the limiting ribs is connected to the first elastic shaft, with a scraper provided at the top of the first elastic shaft.

[0011] Furthermore, the scraper is inclined at a 30-degree angle to the length direction of the embedded plate.

[0012] Furthermore, the first elastic shaft is made of spring steel and has a diameter of 1-3 mm.

[0013] Furthermore, the flexible shaving hammer includes a second elastic shaft of the same material and size as the first elastic shaft, which is disposed on the embedded plate, and the shaving hammer is disposed on the top of the second elastic shaft.

[0014] The beneficial effects of this utility model are as follows: Automated operation is achieved through electric drill drive, solving the problems of low efficiency and high safety hazards associated with manual chiseling in confined spaces at high altitudes, thus improving construction efficiency; the synergistic effect of the scraper and brush ensures thorough removal of PVC pipes, and the secondary treatment by the chisel and brush creates a high-roughness interface, improving the bonding strength between the anchor rod and the concrete; the scraper assembly and chisel assembly can be quickly replaced to adapt to the needs of different construction stages, and the detachable design of the brush plate reduces maintenance costs; this mechanism effectively solves the technical bottlenecks of incomplete hole cleaning, difficult interface treatment, and high construction risks in traditional methods, providing an efficient, safe, and reliable technical solution for the construction of pre-embedded holes for bridge bearings. Attached Figure Description

[0015] 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 of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a cleaning mechanism for pre-embedded support holes in a cap beam, provided for an embodiment of this utility model; Figure 2 A schematic diagram of the cleaning brush provided for an embodiment of this utility model; Figure 3 A schematic diagram of the scraper assembly provided in this embodiment of the utility model; Figure 4 A schematic diagram of the structure of the chiseling assembly provided for an embodiment of this utility model.

[0017] In the diagram: 10, Drill body; 20, Cleaning brush; 21, Connecting male head; 22, Drill rod; 2201, Embedded groove; 2202, Embedded hole; 2203, Locking hole a; 23, Brush plate; 2301, Arc plate; 2302, Brush bristles; 30, Scraper assembly; 31, First insert; 3101, Connector; 3102, Shaft; 31021, Locking hole b; 3103, Embedded plate; 32, Flexible scraper; 3201, First elastic shaft; 3202, Limiting rib; 3203, Scraper; 40, Sharpening assembly; 41, Second insert; 42, Flexible Sharpening hammer; 4201, Second elastic shaft; 4202, Sharpening hammer. Detailed Implementation

[0018] 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 scope of protection of this utility model.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figure 1-2 As shown, this utility model provides a cleaning mechanism for pre-embedded support holes in a cap beam, including a cleaning brush 20. The cleaning brush 20 is divided into two parts: a connecting male head 21 at the rear end and a drill rod 22 at the front end. An embedding hole 2202 is provided at the center of the front end of the drill rod 22. Three embedding grooves 2201 are formed in a circumferential array on the surface of the drill rod 22. A brush plate 23 is provided on the outer side of the drill rod 22 between any two embedding grooves 2201. A scraper assembly 30 or a chisel assembly 40 is detachably connected to the embedding hole 2202. The scraper assembly 30 includes a first insert 31 embedded in the embedding groove 2201 and the embedding hole 2202. A flexible scraper 32 is provided on the outer surface of the first insert 31. The chisel assembly 40 has the same structure as the first insert 31. The second insert 41 has a flexible chisel hammer 42 on its outer surface. In use, an electric drill body 10 is used as a power source. The male connector 21 of the cleaning brush 20 is inserted into the insertion end of the electric drill body 10 and fixed. At the same time, the scraper assembly 30 is installed. After the cleaning brush 20 is rotated, the inner wall of the PVC pipe can be damaged by the scraper 3203. The PVC pipe is brushed off with the metal bristles 2302. After the debris inside the channel is removed by external tools (such as blowpipes, air ducts, etc.), the chisel assembly 40 is installed. The chisel hammer 4202 on the chisel assembly 40 is used to roughen the inner wall of the channel. At the same time, the metal bristles are used to remove the unstable broken structure inside. After the channel is cleaned a second time, a hole that meets the requirements can be obtained.

[0021] In this embodiment, the brush plate 23 includes an arc plate 2301, which is fixedly connected to the drill rod 22 by bolts. The outer surface of the arc plate 2301 is provided with bristles 2302. Since metal brushes will wear and deform under local pressure after long-term use, the brush plate 23 is designed to be detachable to facilitate replacement.

[0022] In this embodiment, the bristles 2302 are made of one of the following materials: steel wire, copper-plated steel wire, 304 stainless steel, or copper wire.

[0023] Furthermore, the length of the scraper assembly 30 or the chisel assembly 40 assembled on the drill rod 22 is 10-20cm. This length is suitable for the depth of standard anchor holes. If deeper anchor holes need to be processed, a longer version of this device can be customized accordingly.

[0024] like Figure 3As shown, the first insert 31 includes a connector 3101, one end of which is flat and the other end is curved. The curved end facilitates reducing friction with the bottom of the hole during hole cleaning. A shaft 3102 is provided at the center of the flat surface, and three embedded plates 3103 are arranged in a circumferential array along the edge of the flat surface along the shaft 3102. Three locking holes a2203 are arranged in a circumferential array on the rear side of the outer surface of the drill rod 22, and three locking holes b31021 are arranged in a circumferential array on the rear side of the outer surface of the shaft 3102. The shaft 3102 is inserted into the embedded groove 2201, and the embedded plates 3103 are inserted into the embedded groove 2201 until the connector 3101 abuts against the front end of the drill rod 22. At this time, any one of the locking holes b31021 is coaxial with the adjacent locking hole a2203. One set of coaxial locking holes is fixed by a hand-tightening nut.

[0025] In this embodiment, the flexible scraper 32 includes a first elastic shaft 3201 arrayed on the outside of the embedded plate 3103. Each first elastic shaft 3201 has a limiting rib 3202 connected to the embedded plate 3103 on both sides and along the length of the embedded plate 3103. Only the lower half of the limiting rib 3202 is connected to the first elastic shaft 3201. The top of the first elastic shaft 3201 is provided with a scraper 3203. The scraper 3203 is inclined at 30 degrees to the length of the embedded plate 3103. When the drill rod 22 rotates, the scraper 3203 damages the inside of the PVC pipe. With the help of the metal bristles 2302, the PVC pipe is peeled off. During this process, the limiting rib 3202 restricts the bending direction of the first elastic shaft 3201 to a certain extent, so as to avoid the drill rod 22 moving too far in the longitudinal direction of the channel, which would cause deformation that cannot be recovered, thus affecting the subsequent lateral cutting effect of the scraper 3203.

[0026] Furthermore, the first elastic shaft 3201 is made of spring steel with a diameter of 1-3mm. Spring steel has extremely high elastic limit, yield strength, toughness and excellent fatigue resistance. It can recover its original shape after repeated bending and deformation and is not prone to permanent deformation or fracture. At the same time, it is an easily obtainable metal material.

[0027] like Figure 4 As shown, the flexible chisel hammer 42 includes a second elastic shaft 4201 with the same material and size as the first elastic shaft 3201, which is provided on the embedded plate 3103. The top of the second elastic shaft 4201 is provided with a chisel hammer 4202. The chisel hammer 4202 is a multi-faceted metal part, such as copper or 304 stainless steel. Based on the edges of the geometry of the chisel hammer 4202 and its own weight, it chisels the inside of the channel as the drill rod 22 rotates. At the same time, a rebound will be formed during this movement. The combination of the two can roughen the surface of the channel.

[0028] Specifically, the working principle of this cleaning mechanism for pre-embedded support holes in a cap beam is as follows: Using the electric drill body 10 as a power source, a detachable cleaning brush 20 enables coordinated hole cleaning and interface treatment. The drill rod 22 at the front end of the cleaning brush 20 is equipped with three circumferentially arrayed embedding grooves 2201 and a central embedding hole 2202, allowing for quick clamping of the scraper assembly 30 or the roughening assembly 40. During operation, the scraper assembly 30 is first inserted into the front end of the drill rod 22. The electric drill body 10 drives the drill rod 22 to rotate. Under centrifugal force and elastic shaft support, the flexible scraper 32 of the scraper assembly 30 radially scrapes the inner wall of the deformed PVC pipe. Simultaneously, the drill rod 22... The surface metal brush plate 23 performs a secondary brushing to remove the peeled PVC fragments and loose concrete. After this stage, the debris in the channel is cleaned by an external blowing device. After the PVC pipe is removed, it is replaced with a chisel assembly 40. Its flexible chisel hammer 42 impacts the hole wall at high frequency during rotation to form a uniform rough interface. At the same time, the metal brush further removes the scum, and finally obtains a channel structure that meets the requirements for anchor rod bonding. Through the above structure, the problems of PVC pipes being difficult to remove at high altitudes and the difficulty in roughening the peeled channel, which makes it difficult to fix the subsequent anchor rod, are solved in the existing technology, ultimately leading to a decrease in the reliability of the support anchorage.

[0029] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A cleaning mechanism for pre-embedded support holes in a cap beam, characterized in that, The cleaning brush consists of two parts: a male connector at the rear end and a drill rod at the front end. An embedding hole is located at the center of the drill rod's front end. Three embedding slots are arranged in a circumferential array on the surface of the drill rod. A brush plate is positioned on the outer side of the drill rod between any two of the embedding slots. A scraper assembly or a chisel assembly is detachably connected to the embedding hole. The scraper assembly includes a first insert embedded in the embedding slots and the embedding hole, with a flexible scraper on its outer surface. The chisel assembly has a second insert with the same structure as the first insert, and a flexible chisel hammer on its outer surface.

2. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 1, characterized in that, The brush plate includes an arc-shaped plate, which is fixedly connected to the drill rod by bolts, and the outer surface of the arc-shaped plate is provided with bristles.

3. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 2, characterized in that, The bristles are made of one of the following materials: steel wire, copper-plated steel wire, 304 stainless steel, or copper wire.

4. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 1, characterized in that, The length of the scraper assembly or the chisel assembly attached to the drill rod is 10-20cm.

5. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 1, characterized in that, The first insert includes a connector, one end of which is a flat surface and the other end is an arc surface. A shaft is provided at the center of the flat surface, and three embedded plates are arranged in a circular array along the circumference of the shaft at the edge of the flat surface.

6. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 5, characterized in that, The outer surface of the drill rod has three locking holes a arranged in a circumferential array on the rear side, and the outer surface of the shaft has three locking holes b arranged in a circumferential array on the rear side. The shaft is inserted into the embedding groove, and the embedding plate is inserted into the embedding groove until the connector abuts against the front end of the drill rod. At this time, any one of the locking holes b is coaxial with the adjacent locking hole a, and a set of coaxial locking holes is fixed by a hand-tightening nut.

7. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 6, characterized in that, The flexible scraper includes a first elastic shaft arrayed on the outside of the embedded plate. Each first elastic shaft has a limiting rib connected to the embedded plate on both sides and along the length of the embedded plate. Only the lower half of the limiting rib is connected to the first elastic shaft. The top of the first elastic shaft is provided with a scraper.

8. The cleaning mechanism for pre-embedded support holes in a cap beam according to claim 7, characterized in that, The scraper is inclined at 30 degrees to the length direction of the embedded plate.

9. A cleaning mechanism for pre-embedded support holes in a cap beam according to claim 7, characterized in that, The first elastic shaft is made of spring steel and has a diameter of 1-3 mm.

10. A cleaning mechanism for pre-embedded support holes in a cap beam according to claim 9, characterized in that, The flexible chisel hammer includes a second elastic shaft of the same material and size as the first elastic shaft, which is provided on the embedded plate, and the chisel hammer is provided on the top of the second elastic shaft.

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