Concrete pier maintenance device

Abstract

The utility model relates to a kind of concrete pier maintenance devices, it includes: tensioning fixed seat, it includes detachably set on pier base plate and the installation boss of setting on base plate;Tensioning mechanism, it includes the ratchet seat of setting on installation boss, ratchet pawl assembly and rotating shaft;Ratchet pawl assembly includes the ratchet of rotation setting in ratchet seat and the two connecting shafts of setting ratchet both sides, connecting shaft protrudes ratchet seat setting, connecting shaft is detachably connected with rotating shaft, rotating shaft is wound with the fibrous cloth of belt and is set, and rotating shaft free end is provided with tensioning boss for and torque wrench or adjustable torque electric drill is connected.Rounded fibrous cloth is provided to the full coverage maintenance of pier, and the concrete pier maintenance device of realizing fibrous cloth pre-tensioning operation.

Description

Technical Field

[0001] This utility model relates to the field of reinforcement and maintenance technology for concrete bridge piers, specifically a concrete bridge pier maintenance device. Background Technology

[0002] In the transportation infrastructure system, concrete bridge piers, as the core load-bearing components of bridges, are subjected to complex effects such as vehicle loads, temperature changes, and wet-dry cycles over a long period of time. At the same time, they are exposed to corrosive environments such as the atmosphere, rainwater, and chloride ions (in coastal areas or areas where snow and ice melt), which can easily lead to defects such as concrete carbonization, cracks, and surface spalling, affecting the structural bearing capacity and durability.

[0003] Existing methods for repairing and maintaining concrete bridge piers often involve wrapping them with fiber cloth. A specific example is the construction method for reinforcing circular structures with pre-tensioned high-strength fiber cloth (authorization announcement number CN102121316B), which uses anchor heads to wrap the fiber cloth strips around the pier for repair. However, this method cannot easily achieve full coverage of the pier with fiber cloth, and the anchor heads need to remain on the pier after repair, increasing the load on the pier. To achieve full coverage of the pier with fiber cloth, and to enable pre-tensioning of the fiber cloth while reducing the residue of anchoring components on the pier, a novel concrete bridge pier maintenance device is needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a concrete bridge pier maintenance device that can achieve full coverage maintenance of bridge piers with fiber cloth and can also realize the pre-tensioning operation of fiber cloth.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: A concrete bridge pier maintenance device, the key technology of which includes: The tensioning fixing seat includes a base plate detachably disposed on the pier and a mounting boss disposed on the base plate; The tensioning mechanism includes a ratchet seat, a ratchet and pawl assembly, and a rotating shaft disposed on the mounting boss. The ratchet and pawl assembly includes a ratchet rotatably disposed within the ratchet seat and two connecting shafts disposed on both sides of the ratchet. The connecting shafts protrude from the ratchet seat and are detachably connected to the rotating shaft. A strip of fiber cloth is wound around the rotating shaft, and a tensioning boss is provided on the free end of the rotating shaft for connecting to a torque wrench or an adjustable torque electric drill.

[0006] In one embodiment of this utility model, the mounting boss is in the shape of an inclined plate with a mounting groove at its lower end. The ratchet seat is detachably disposed in the mounting groove, and the length direction of the rotating shaft is perpendicular to the mounting boss, so that the rotation direction of the rotating shaft is consistent with the direction in which the fiber cloth is wrapped around the bridge pier.

[0007] In one embodiment of this utility model, a ratchet mounting groove is provided in the ratchet seat corresponding to the ratchet, the ratchet is placed on the ratchet mounting groove, a through rotating hole is provided on the ratchet seat corresponding to the connecting shaft, the connecting shaft is rotatably mounted on the rotating hole, a pawl mounting groove is provided on the ratchet seat outside the ratchet mounting groove, and the pawl of the ratchet pawl assembly is mounted on the pawl mounting groove.

[0008] In one embodiment of this utility model, a sealing plate is provided on the ratchet seat corresponding to the pawl mounting groove to block the pawl mounting groove, thereby limiting the ratchet. The sealing plate is provided with a sealing plate through hole corresponding to the connecting shaft, and the connecting shaft passes through the sealing plate through hole.

[0009] In one embodiment of this utility model, the end of the connecting shaft is provided with a key, and the key is provided with a through key hole. The end of the rotating shaft is provided with a key hole corresponding to the key portion, and the rotating shaft is sleeved on the key portion through the key hole so that the rotating shaft rotates synchronously with the ratchet; Bolt holes are provided on both sides of the key hole, and the bolt holes correspond to the key hole to insert bolt assemblies to fix the rotating shaft and the connecting shaft.

[0010] In one embodiment of this utility model, the substrate has two through holes facing each other in the vertical direction, and the bridge pier has two anchoring holes corresponding to the two through holes. The two through holes on the substrate and the two anchoring holes are opposite to each other so that screws are inserted to fix the substrate and the bridge pier.

[0011] In one embodiment of this utility model, an arc-shaped pad is provided on the side of the base plate facing the bridge pier, and the arc-shaped pad is provided with an arc surface corresponding to the outline of the bridge pier.

[0012] In one embodiment of this utility model, a limiting disk is provided at the lower end of the rotating shaft, and the limiting disk abuts against the lower end surface of the roll-shaped fiber cloth.

[0013] The beneficial effects of adopting the above technical solution are as follows: This application first installs the tensioning fixing seat and ratchet seat at the first preset position on the lower part of the bridge pier. Then, a strip of fiber cloth is wound around it using a rotating shaft. The operator holds the rotating shaft and starts winding the fiber cloth from the lower end of the bridge pier. After winding to the predetermined position, the rotating shaft is connected to the connecting shaft on the ratchet seat at that position. Then, an electric drill or torque wrench with a set torque is used to rotate the rotating shaft. The unidirectional rotation characteristic of the ratchet tensions the fiber cloth, forming prestress. At this time, adhesive is applied. After the fiber cloth is fixedly connected to the bridge pier, the rotating shaft is removed, the tensioning fixing seat is removed, and the tensioning fixing seat is installed at the next preset position. The rotating shaft is then used to spirally wind the fiber cloth around the pier to the next preset position. The rotating shaft and the connecting shaft are then connected to perform the tensioning and adhesive application for the next section of fiber cloth. This achieves full fiber cloth coverage maintenance of the bridge pier, and the fiber cloth has pre-tension, which increases the repair effect. After the repair, the tensioning fixing seat is removed so that it does not remain on the bridge pier and can be reused. Attached Figure Description

[0014] Figure 1 This is a front view of an embodiment where fiber cloth is tensioned on a bridge pier.

[0015] Figure 2 This is a structural schematic diagram of an embodiment.

[0016] Figure 3 This is a schematic diagram of the tensioning mechanism and tensioning fixing seat after disassembly in the embodiment.

[0017] Figure 4 This is a top view structural diagram of the tensioning mechanism's rotating shaft and ratchet seat after disassembly in an embodiment.

[0018] Figure 5 yes Figure 4 A structural diagram showing the view from below the hidden fiber fabric.

[0019] Figure 6 This is a three-dimensional structural diagram of the ratchet seat in an embodiment.

[0020] Figure 7 This is a front view of the interior of the ratchet seat in the embodiment.

[0021] Of which: 100 bridge piers; 200 fiber cloth; 300 Tensioner mounting base; 301 Base plate; 302 Mounting boss; 303 Mounting groove; 304 Arc-shaped pad; 400 tensioning mechanism; 401 Ratchet seat; 401-1 Pawl mounting slot; 401-2 Ratchet mounting slot; 402 Ratchet; 402-1 Connecting Shaft; 402-2 Key; 402-3 Pawl; 403 sealing plate; 404 pivot; 404-1 keyhole; 404-2 bolt hole; 405 Limit plate; 406 Tensioning boss. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0023] like Figures 1 to 7 The concrete bridge pier maintenance device shown includes a tensioning fixing seat 300 and a tensioning mechanism 400. The ratchet seat 401 of the tensioning mechanism 400 is detachably mounted on the tensioning fixing seat 300. The rotating shaft 404 of the tensioning mechanism 400 first winds a strip of fiber cloth 200 around it, which acts as a roller. After winding, the rotating shaft 404 is connected to the ratchet of the ratchet seat 401 to act as a pre-tightening drive shaft, thereby realizing the winding and pre-tensioning functions of the fiber cloth 200.

[0024] See Figure 2 and Figure 3 The tensioning fixing seat 300 includes a base plate 301 disposed on the pier 100 and a mounting boss 302 disposed on the base plate 301. The mounting boss 302 is inclined plate-shaped, and a mounting groove 303 is formed at its lower end. The ratchet seat 401 is detachably disposed in the mounting groove 303 by means of a bolt assembly. A through hole is formed on the mounting groove 303 corresponding to the connecting shaft 402-1 to allow space for the connecting shaft 402-1. The length direction of the rotating shaft 404 is perpendicular to the mounting boss 302, so that the rotation direction of the rotating shaft 404 is consistent with the direction in which the fiber cloth 200 is wound around the pier, so that the fiber cloth 200 is subjected to more even force when tensioned.

[0025] See Figure 1 The base plate 301 is a vertically elongated strip with two through holes perpendicular to each other in the vertical direction. The pier 100 has two anchoring holes corresponding to these through holes. These anchoring holes are pre-drilled on the surface of the pier and filled with expanding adhesive to better anchor the base plate 301 after bolts are inserted. The two through holes on the base plate 301 are aligned with the two anchoring holes, and screws are used to fix the base plate 301 to the pier 100. Figure 1 , Figure 2 and Figure 3 An arc-shaped pad 304 is provided on the side of the base plate 301 facing the pier 100, and the arc-shaped pad 304 is provided with an arc surface corresponding to the outline of the pier 100.

[0026] See Figures 3 to 5The tensioning mechanism 400 includes a ratchet seat 401, a ratchet and pawl assembly, and a rotating shaft 404, all mounted on the mounting boss 302. The ratchet and pawl assembly includes a ratchet 402 rotatably mounted within the ratchet seat 401 and two connecting shafts 402-1 located on either side of the ratchet 402. The connecting shafts 402-1 protrude from the ratchet seat 401 and are detachably connected to the rotating shaft 404. A strip of fiber cloth 200 is wound around the rotating shaft 404. A hexagonal nut-shaped tensioning boss 406 (or an internal hexagonal nut structure) is located at the free end of the rotating shaft 404 for connection to a torque wrench or an adjustable torque drill (such as a Bosch GSR 120-LI hand drill). In this embodiment, one end of the fiber cloth 200 is fixedly connected to the rotating shaft 404 by adhesive.

[0027] See Figure 6 and Figure 7 The ratchet seat 401 has a ratchet mounting groove 402-2 corresponding to the ratchet 402, and the ratchet 402 is placed on the ratchet mounting groove 402-2. The ratchet seat 401 has a through rotating hole corresponding to the connecting shaft 402-1, and the connecting shaft 402-1 is rotatably mounted on the rotating hole. Preferably, a bushing is fixedly mounted on the rotating hole, and the bushing is rotatably connected to the connecting shaft 402-1. The ratchet seat 401 has a pawl mounting groove 401-1 located outside the ratchet mounting groove 402-2, and the pawl 402-3 of the ratchet pawl assembly is mounted on the pawl mounting groove 401-1.

[0028] See Figure 4 and Figure 5 A sealing plate 403 is provided on the ratchet seat 401 corresponding to the pawl mounting groove 401-1 to block the pawl mounting groove 401-1, thereby limiting the ratchet 402. A sealing plate through hole is provided on the sealing plate 403 corresponding to the connecting shaft 402-1, and the connecting shaft 402-1 passes through the sealing plate through hole.

[0029] In this embodiment, after the sealing plate 403 is fastened, the two sides of the ratchet seat 401 are symmetrical (one side ratchet 402 restricts the rotation of the shaft 404 clockwise, and the other side restricts the rotation of the shaft 404 counterclockwise). By changing the contact surface between the ratchet seat 401 and the mounting boss 302, it can be determined whether the fiber cloth 200 is tensioned clockwise or counterclockwise.

[0030] See Figure 4 and Figure 5The connecting shaft 402-1 has a key portion 402-2 at its end, and a through key hole on the key portion. The rotating shaft 404 has a keyhole 404-1 at its end corresponding to the key portion 402-2. The rotating shaft 404 is fitted onto the key portion 402-2 through the keyhole 404-1 so that the rotating shaft 404 rotates synchronously with the ratchet 402. Bolt holes 404-2 are provided through both sides of the keyhole 404-1, and these bolt holes correspond to the through key hole to allow bolt assemblies to pass through and securely connect the rotating shaft 404 and the connecting shaft 402-1.

[0031] See details Figure 5 The lower end of the rotating shaft 404 is provided with a limiting disk 405, which abuts against the lower end surface of the roll-shaped fiber cloth 200 to support the roll-shaped fiber cloth 200.

[0032] The operation steps are as follows: The width, winding direction and total number of turns of the fiber cloth 200 are designed according to the diameter and height of the bridge pier. Anchor holes are pre-set, and a tension fixing seat 300 with an inclination angle that matches the winding direction of the mounting boss 302 is selected. The installation direction of the ratchet seat 401 is determined according to the winding direction. Anchor screws are inserted at the preset position (the position after the fiber cloth 200 has been spirally wound once or twice) to install the tension fixing seat 300 on the anchor hole; After winding 200 mm of fiber cloth using a 404 rotating shaft; Starting from the bottom of the pier 100, the fiber cloth is wound around the shaft 404 by hand, first circumferentially once and then spirally upward. After the fiber cloth 200 is wrapped around the beginning of the bridge pier 100 once, it is anchored to the pier 100 by applying screws to prevent the end of the fiber cloth 200 from loosening. After the fiber cloth 200 is wound to the preset position, bolts are used to connect the rotating shaft 404 and the connecting shaft 402-1. After connecting the external hexagonal sleeve with the set torque using a hand drill, it is connected to the tensioning boss 406 for pre-tensioning. After pre-tightening is completed, apply adhesive. After the glue solidifies, separate the rotating shaft 404 from the connecting shaft 402-1, remove the tension fixing seat 300, and fix it in the next preset position. Repeat the winding and tensioning operation of the fiber cloth 200. The fiber cloth 200 is wrapped around the top of the pier 100, and the end of the fiber cloth 200 is fixed to the pier 100 by applying screws.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A maintenance device for concrete bridge piers, characterized in that, It includes: The tensioning fixing seat (300) includes a base plate (301) detachably disposed on the pier (100) and a mounting boss (302) disposed on the base plate (301). The tensioning mechanism (400) includes a ratchet seat (401), a ratchet and pawl assembly, and a rotating shaft (404) disposed on the mounting boss (302). The ratchet and pawl assembly includes a ratchet (402) rotatably disposed in the ratchet seat (401) and two connecting shafts (402-1) disposed on both sides of the ratchet (402). The connecting shafts (402-1) protrude from the ratchet seat (401) and are detachably connected to the rotating shaft (404). A strip of fiber cloth (200) is wound around the rotating shaft (404). A tensioning boss (406) is provided on the free end of the rotating shaft (404) for connecting to a torque wrench or an adjustable torque electric drill.

2. The concrete bridge pier maintenance device according to claim 1, characterized in that, The mounting boss (302) is in the shape of an inclined plate, and a mounting groove (303) is provided at its lower end. The ratchet seat (401) is detachably installed in the mounting groove (303), and the length direction of the rotating shaft (404) is perpendicular to the mounting boss (302), so that the rotation direction of the rotating shaft (404) is consistent with the direction in which the fiber cloth (200) is wrapped around the pier.

3. The concrete bridge pier maintenance device according to claim 1, characterized in that, The ratchet seat (401) has a ratchet mounting groove (402-2) corresponding to the ratchet (402), the ratchet (402) is placed on the ratchet mounting groove (402-2), the ratchet seat (401) has a through rotating hole corresponding to the connecting shaft (402-1), the connecting shaft (402-1) is rotatably mounted on the rotating hole, the ratchet seat (401) has a pawl mounting groove (401-1) located outside the ratchet mounting groove (402-2), and the pawl (402-3) of the ratchet pawl assembly is mounted on the pawl mounting groove (401-1).

4. A concrete bridge pier maintenance device according to claim 3, characterized in that, A sealing plate (403) is provided on the ratchet seat (401) corresponding to the pawl mounting groove (401-1) to block the pawl mounting groove (401-1) and thereby limit the ratchet (402). A sealing plate through hole is provided on the sealing plate (403) corresponding to the connecting shaft (402-1), and the connecting shaft (402-1) passes through the sealing plate through hole.

5. A concrete bridge pier maintenance device according to claim 1, characterized in that, The end of the connecting shaft (402-1) is provided with a key (402-2), and the key is provided with a through key hole; The end of the rotating shaft (404) is provided with a key hole (404-1) corresponding to the key part (402-2). The rotating shaft (404) is sleeved on the key part (402-2) through the key hole (404-1) so that the rotating shaft (404) and the ratchet (402) rotate synchronously. Bolt holes (404-2) are provided on both sides of the key hole (404-1). The bolt holes correspond to the key through holes to insert bolt assemblies to fix the rotating shaft (404) and the connecting shaft (402-1) together.

6. A concrete bridge pier maintenance device according to claim 1, characterized in that, The substrate (301) has two through holes in the vertical direction, and the pier (100) has two anchor holes corresponding to the two through holes. The two through holes on the substrate (301) and the two anchor holes are opposite to each other, and screws are used to fix the substrate (301) and the pier (100) together.

7. A concrete bridge pier maintenance device according to claim 6, characterized in that, An arc-shaped pad (304) is provided on the side of the base plate (301) facing the pier (100), and the arc-shaped pad (304) is provided with an arc surface corresponding to the outline of the pier (100).

8. A concrete bridge pier maintenance device according to claim 1, characterized in that, The lower end of the rotating shaft (404) is provided with a limiting disk (405), which abuts against the lower end surface of the roll-shaped fiber cloth (200).

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