A box girder web concrete placement auxiliary device

Abstract

This utility model relates to the field of auxiliary concrete pouring equipment technology, specifically, it discloses an auxiliary device for concrete placement in the web of a box girder. It includes a main body comprising two parallel slide rails arranged along the length of the box girder formwork. A hopper is positioned above the slide rails, and a sliding mechanism connected to the hopper is provided between the hopper and the slide rails. The sliding mechanism drives the hopper to move along the slide rails. This design prevents the large free fall distance of concrete, aggregate separation from the slurry, and subsequent accumulation of aggregate at the bottom of the formwork and excessive slurry on top, which is common with traditional direct concrete pouring via pump pipes.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary concrete pouring equipment technology, specifically, to an auxiliary device for concrete placement in the web of a box girder. Background Technology

[0002] During box girder construction, formwork needs to be erected beforehand. The formwork generally consists of a base plate and a web plate, which together form the cavity. After the formwork is erected, construction workers need to pour concrete into the cavity. Due to the large volume of the box girder, the web plate is usually set vertically or at an angle. This results in a significant drop between the bottoms of the box girder formwork, and the internal space of the cavity is occupied by dense steel mesh and prestressed ducts, leaving limited space for concrete flow and placement. Furthermore, the dense steel mesh and prestressed ducts in the web plate, the main load-bearing component, create a dense, interconnected structure. Grid; however, most existing pouring methods rely on pumping. During pumping, construction workers stand on top of the formwork, holding the concrete pumping pipe and pumping concrete into the cavity through the opening at the top. Because the opening of the concrete pumping pipe is small, the concrete concentrates its impact on the reinforcing steel and emergency pipes during pumping, easily causing damage to them. At the same time, with the pipe opening located above the formwork, it is difficult to control the concrete's landing point during delivery, causing concrete to easily spill out of the web during pouring, resulting in a honeycomb-like or pitted appearance on the concrete surface. Utility Model Content

[0003] This utility model provides an auxiliary device for concrete placement in the web of a box girder, which can overcome some or all of the defects of the prior art.

[0004] According to the present invention, a concrete placement auxiliary device for the web of a box girder includes: a device body, the device body including two parallel slide rails, the two slide rails being arranged along the length direction of the box girder template; a hopper is provided above the slide rails, and a sliding mechanism connected to the hopper is provided between the hopper and the slide rails, the sliding mechanism being used to drive the hopper to move along the slide rails.

[0005] With this invention, when pouring box girders, construction workers first lay the slide rails at the concrete pouring inlet above the box girder formwork. During installation, bolts are used to connect the slide rails to the formwork through through-holes in the connecting blocks. After the slide rails are laid, a crane lifts the hopper to the top of the slide rails. Then, with manual assistance, the limiting grooves on the sleeves at both ends of the crossbars are secured to the slide rails. When pouring the box girder, the workers align the discharge port of the concrete discharge pipe with the hopper. The pump is then started to deliver the concrete to the discharge port of the discharge pipe. The concrete flows from the discharge port and into the hopper, where it is buffered and guided to ensure proper flow. The slow and even pouring of concrete into the formwork prevents the large free fall distance of concrete, which can lead to separation of aggregate and slurry, resulting in stone accumulation at the bottom of the formwork and excessive laitance at the top, as is common with traditional pump pipes. Simultaneously, the hopper disperses the impact force of the concrete during pouring, reducing damage to the reinforcing steel within the formwork. The guide rail ensures the hopper moves linearly along the box girder axis, preventing deviations caused by manual movement of the pouring pipe. When pouring concrete, workers insert the discharge port of the pipe into the hopper, allowing concrete to flow from the pipe into the hopper, preventing splashing during the concrete's descent.

[0006] Preferably, the hopper includes two trapezoidal first side plates and two rectangular second side plates; the first side plates and the second side plates are connected in sequence to form the hopper.

[0007] With this utility model, installers can weld two first side plates and two second side plates together end to end, which makes it easier for installers to make a feeding hopper. Both the first side plates and the second side plates are made of steel plates.

[0008] Preferably, the sliding mechanism includes two sliding members spaced apart along the length of the second side plate. Each sliding member includes a crossbar connected to the two second side plates. Both ends of the crossbar are provided with sleeves fitted onto the crossbar. The outer wall of the sleeve is recessed inward in the circumferential direction to form a limiting groove, into which the slide rail extends.

[0009] With this invention, installers weld the crossbar to the bottom of the hopper and connect it to the two second side plates. After the crossbar is connected, installers place sleeves on both ends of the crossbar. Each end of the crossbar has a threaded rod that passes through the sleeve. After the threaded rod passes through the sleeve, installers tighten the sleeve with nuts to prevent the sleeve from detaching from the crossbar. The limiting groove on the sleeve engages with the slide rail, preventing the hopper from derailing during movement.

[0010] Preferably, a diagonal brace is provided between the crossbar and the second side plate to connect the crossbar and the second side plate.

[0011] With this invention, the two ends of the diagonal brace are welded to the crossbar and the second side plate respectively, and the diagonal brace can better improve the overall structural strength of the main body of the device.

[0012] Preferably, both ends of the hopper are provided with connecting rods that are arranged along the width direction of the hopper.

[0013] With this invention, construction workers can move the hopper along the slide rail by pushing the connecting rod, thus making it easier for them to move the device.

[0014] Preferably, the slide rail includes a guide rod, and multiple connecting blocks are provided at both ends of the guide rod. The multiple connecting blocks are spaced apart along the length of the guide rod; through holes are provided at the connecting blocks.

[0015] With this invention, when laying the slide rail, the guide rod is fixed to the template by passing bolts through the through holes on the connecting block, which makes it convenient for construction workers to lay the slide rail; when dismantling, the slide rail can be removed simply by removing the bolts, which is convenient and quick.

[0016] Preferably, a reinforcing plate is provided on the outer wall of the second side plate.

[0017] According to this utility model, the outer wall of the second side plate is provided with reinforcing plates arranged in a crisscross pattern. The reinforcing plates are made of channel steel and welded to the outer wall of the second side plate. The reinforcing plates can enhance the structural strength of the second side plate and prevent the second side plate from deforming when concrete impacts it. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main body of the device in Example 1.

[0019] Figure 2 This is a schematic diagram of the feeding hopper in Example 1.

[0020] Figure 3 This is a schematic diagram of the slider in Example 1.

[0021] Figure 4 This is a schematic diagram of the slide rail in Example 1. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of the utility model is provided in conjunction with the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the utility model.

[0023] Example 1

[0024] like Figure 1-4As shown, this embodiment provides an auxiliary device for concrete placement in the web of a box girder, including a main body 110. The main body includes two parallel slide rails 130, which are arranged along the length of the box girder template. A hopper 120 is provided above the slide rails 130, and a sliding mechanism connected to the hopper 120 is provided between the hopper 120 and the slide rails 130. The sliding mechanism is used to drive the hopper 120 to move along the slide rails 130.

[0025] In this embodiment, when pouring the box girder, the construction workers first lay the slide rail 130 at the concrete pouring opening above the box girder formwork. While laying the slide rail 130, bolts are used to connect it to the formwork through the through holes 420 on the connecting block 410. After the slide rail 130 is laid, a crane is used to hoist the discharge hopper 120 above the slide rail 130. Then, with manual assistance, the limiting grooves 330 on the sleeves 340 at both ends of the crossbar 310 are secured to the slide rail 130. When the construction workers need to pour the box girder, they align the discharge port of the concrete discharge pipe with the discharge hopper 120. The workers then start the pump to deliver the concrete to the discharge port of the discharge pipe. Once the concrete flows out of the discharge port and into the discharge hopper 120, the discharge hopper 120... 20. By buffering and guiding the flow, the concrete enters the formwork slowly and evenly, preventing the large free fall distance of concrete and the separation of aggregate and slurry that occurs when concrete is directly discharged from a traditional pump pipe. This prevents the accumulation of stones at the bottom of the formwork and excessive slurry at the top. At the same time, during the discharge process, the discharge hopper 120 can disperse the impact force of the concrete, thereby reducing the damage to the steel bars in the formwork during the concrete's fall. The guide rail 130 ensures that the discharge hopper 120 moves in a straight line along the axis of the box girder, avoiding deviations in pouring caused by manual operation of the discharge pipe. When pouring concrete, the construction personnel insert the discharge port of the discharge pipe into the discharge hopper 120, and the concrete flows out of the discharge pipe and into the discharge hopper 120. The discharge hopper 120 can prevent splashing of concrete during the fall.

[0026] In this embodiment, the hopper 120 includes two trapezoidal first side plates 220 and two rectangular second side plates 210; the first side plates 220 and the second side plates 210 are connected in sequence to form the hopper 120.

[0027] In this embodiment, the installer welds the two first side plates 220 and the two second side plates 210 together end to end, which makes it easier for the installer to make the feeding hopper 120. Both the first side plates 220 and the second side plates 210 are made of steel plates.

[0028] In this embodiment, the sliding mechanism includes two sliding members 140 spaced apart along the length of the second side plate 210. Each sliding member 140 includes a crossbar 310 connected to the two second side plates 210. Both ends of the crossbar 310 are provided with sleeves 340 fitted onto the crossbar 310. The outer wall of the sleeve 340 is recessed inward along the circumferential direction to form a limiting groove 330, into which the slide rail 130 extends.

[0029] In this embodiment, the installer welds the crossbar 310 to the bottom of the hopper 120 and connects it to the two second side plates 210 by welding. After the crossbar 310 is connected, the installer puts the sleeves 340 on both ends of the crossbar 310. The two ends of the crossbar 310 are respectively provided with threaded rods that pass through the sleeves 340. After the threaded rods pass through the sleeves 340, the installer tightens the nuts onto the threaded rods to abut the sleeves 340 and prevent the sleeves 340 from detaching from the crossbar 310. The limiting groove 330 on the sleeve 340 is engaged with the slide rail 130 to prevent the hopper 120 from derailing during the movement of the hopper 120.

[0030] In this embodiment, a diagonal brace 320 for connecting the crossbar 310 and the second side plate 210 is provided between the crossbar 310 and the second side plate 210.

[0031] In this embodiment, the two ends of the diagonal brace 320 are welded to the crossbar 310 and the second side plate 210 respectively. The diagonal brace 320 can better improve the overall structural strength of the main body 110 of the device.

[0032] In this embodiment, both ends of the hopper 120 are provided with connecting rods 150 arranged along the width direction of the hopper 120.

[0033] In this embodiment, the construction worker can move the hopper 120 along the slide rail 130 by pushing the connecting rod 150, which makes it convenient for the construction worker to move the device.

[0034] In this embodiment, the slide rail 130 includes a guide rod 430, and multiple connecting blocks 410 are provided at both ends of the guide rod 430. The multiple connecting blocks 410 are spaced apart along the length direction of the guide rod 430. A through hole 420 is provided at the connecting block 410.

[0035] In this embodiment, when laying the slide rail 130, the guide rod 430 is fixed to the template by bolts passing through the through hole 420 on the connecting block 410 and connecting it to the template, which makes it convenient for construction workers to lay the slide rail 130; when dismantling, the slide rail 130 can be removed simply by removing the bolts, which is convenient and quick.

[0036] In this embodiment, a reinforcing plate 230 is provided on the outer wall of the second side plate 210.

[0037] In this embodiment, the outer wall of the second side plate 210 is provided with reinforcing plates 230 arranged in a crisscross pattern. The reinforcing plates 230 are made of channel steel and are welded to the outer wall of the second side plate 210. The reinforcing plates 230 can strengthen the structural strength of the second side plate 210 and prevent the second side plate 210 from deforming when concrete impacts it.

[0038] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0039] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A concrete placement auxiliary device for the web of a box girder, characterized in that: The device includes a main body (110), which includes two parallel slide rails (130) arranged along the length of the box girder template. A hopper (120) is provided above the slide rails (130), and a sliding mechanism connected to the hopper (120) is provided between the hopper (120) and the slide rails (130). The sliding mechanism is used to drive the hopper (120) to move along the slide rails (130).

2. The auxiliary device for concrete placement in the web of a box girder according to claim 1, characterized in that: The hopper (120) includes two trapezoidal first side plates (220) and two rectangular second side plates (210); the first side plates (220) and the second side plates (210) are connected in sequence to form the hopper (120).

3. The auxiliary device for concrete placement in the web of a box girder according to claim 2, characterized in that: The sliding mechanism includes two sliding members (140) spaced apart along the length of the second side plate (210). Each sliding member (140) includes a crossbar (310) connected to the two second side plates (210). Both ends of the crossbar (310) are provided with sleeves (340) fitted onto the crossbar (310). The outer wall of the sleeve (340) is recessed inward along the circumferential direction to form a limiting groove (330), into which the slide rail (130) extends.

4. The auxiliary device for concrete placement in the web of a box girder according to claim 3, characterized in that: A diagonal brace (320) is provided between the crossbar (310) and the second side plate (210) to connect the crossbar (310) and the second side plate (210).

5. The auxiliary device for concrete placement in the web of a box girder according to claim 1, characterized in that: Both ends of the feeding hopper (120) are provided with connecting rods (150) arranged along the width direction of the feeding hopper (120).

6. The auxiliary device for concrete placement in the web of a box girder according to claim 1, characterized in that: The slide rail (130) includes a guide rod (430), and multiple connecting blocks (410) are provided at both ends of the guide rod (430). The multiple connecting blocks (410) are spaced apart along the length direction of the guide rod (430). A through hole (420) is provided at the connecting block (410).

7. The auxiliary device for concrete placement in the web of a box girder according to claim 2, characterized in that: A reinforcing plate (230) is provided on the outer wall of the second side plate (210).

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