Precast beam vent hole cleaning device for road construction

Abstract

The utility model relates to the technical field of precast beam cleaning, in particular to a precast beam vent hole cleaning device for road construction, which comprises a circular support frame, vertical guide rods are mounted on two sides of the top surface of the circular support frame, and a fixing seat capable of moving vertically is mounted at the top ends of the two guide rods. And the middle part of the fixed seat is provided with two connecting shafts which are vertically arranged. The device has the advantages that the guide rods are arranged on the two sides of the top face of the round supporting frame, the fixing base is in sliding connection with the guide rods, the two connecting shafts are perpendicularly placed, the bevel gears meshed with each other are installed at the adjacent ends of the two connecting shafts, and the fixing disc is fixedly connected with the bottom ends of the vertically-placed connecting shafts. A user rotates a hand wheel with one hand to drive a plurality of cutting knives to rotate and control a handle to press downwards, so that films at the two ends of the vent hole are cleaned conveniently, meanwhile, the overall structure is simple, and the cleaning efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to precast beam cleaning technical field, especially a precast beam vent hole cleaning device for road construction. BACKGROUND

[0002] Box girder is a kind of girder in bridge engineering, hollow inside, with flange on the upper two sides, similar to box, thus named. Single-box, multi-box and the like, among which the reinforced concrete structure box girder is divided into precast box girder and cast-in-situ box girder. The box girder precast in independent site can be erected after the completion of lower engineering in combination with bridge erecting machine, which can accelerate engineering progress and save construction period. Cast-in-situ box girder is mostly used in large continuous bridges. In the precast box girder structure, a vent hole for air circulation needs to be installed at the bottom of the box girder. Before pouring the precast box girder, a PVC pipe is wrapped with film at both ends, and then placed in a reinforcement cage. After pouring is completed, the film is pierced with a corresponding tool to complete the vent hole cleaning. The traditional cleaning method is generally performed by manually bending over and rotating the cutting tool around the inner circle of the PVC pipe to clean the film. This method has poor cleaning effect and low cleaning efficiency. Therefore, a precast beam vent hole cleaning device for road construction is proposed to solve the above problems. SUMMARY

[0003] The utility model aims at overcoming the shortcomings of the prior art and providing a precast beam vent hole cleaning device for road construction to effectively solve the problems of the prior art.

[0004] To achieve the above-mentioned purpose, the embodiment of the utility model provides a precast beam vent hole cleaning device for road construction, which comprises a circular support frame, the top surface of which is provided with two vertically placed guide rods, the top ends of the two guide rods are provided with a fixed seat capable of vertical movement, the middle part of the fixed seat is provided with two vertically placed connecting shafts, the adjacent ends of the two connecting shafts are provided with intermeshing bevel gears, one connecting shaft extends into the interior of the circular support frame, and the end thereof is provided with a fixed disc, the edge of the bottom surface of the fixed disc is provided with a plurality of cutting knives, and the other end of the connecting shaft is provided with a hand wheel.

[0005] It is preferred that the bottom surface of the circular support frame is provided with three supporting legs, the bottom ends of the three supporting legs are provided with supporting blocks, and the bottom ends of the three supporting legs are provided with a plurality of sawtooth-shaped protrusions. This scheme facilitates the stable support of the circular support frame by the three supporting blocks and supporting legs, and the plurality of sawtooth-shaped protrusions facilitate the increase of the friction between the precast beam body and the circular support frame, ensuring the stability during cleaning. At the same time, the three supporting legs raise the placement height of the circular support frame, facilitating the observation of the relative position of the cutting knives and the vent hole by the user.

[0006] Preferably, the outer wall of each guide rod is provided with a spring, and the top end of each spring is in contact with the bottom surface of the fixing seat. This facilitates the pushing of the fixing seat by the two springs, and after the user removes the pressure on the control handle, the two springs lift the fixing seat to the highest position of the guide rod, facilitating the sequential cleaning of the plurality of ventilation holes in the precast beam body.

[0007] Preferably, the top end of each guide rod is provided with two locking nuts, which are installed in pairs on the top end of the guide rod. The adjacent two locking nuts are rotated in opposite directions to stabilize the position of the two locking nuts and prevent the fixing seat from sliding off the top end of the guide rod.

[0008] Preferably, the side of the fixing seat away from the hand wheel is provided with a control handle, and the gripping position of the control handle is provided with a protective sleeve. This provides a gripping position for the user, improves the comfort of the user's grip, and facilitates the vertical movement of the fixing seat along the two guide rods to allow the cutting knife to enter the ventilation hole.

[0009] Preferably, the middle part of the fixing disc is hollow, and the outer diameter of the fixing disc is smaller than the inner diameter of the middle part of the circular support frame. This facilitates the user to push the film between the cutting knives out with a wooden stick or steel bar at a later stage, and the hollow structure of the fixing disc can reduce the relative weight. The combination of the circular support frame and the guide rod reduces the relative weight, making the whole more portable.

[0010] The present application has the following advantages:

[0011] 1. The precast beam ventilation hole cleaning device for road construction comprises a circular support frame, two guide rods, a fixing seat, two connecting shafts, a fixing disc, and a plurality of cutting knives. The top surface of the circular support frame is provided with two guide rods, and the fixing seat is slidably connected with the guide rods. The two connecting shafts are vertically placed, and the adjacent ends are provided with meshing bevel gears. The fixing disc is fixedly connected with the bottom end of the vertically placed connecting shaft. The circular support frame is placed at the ventilation hole position of the precast beam. The user rotates the hand wheel to drive the plurality of cutting knives to rotate, and the control handle is pressed down to clean the film at both ends of the ventilation hole. The whole structure is simple and effectively improves the cleaning efficiency.

[0012] 2. The precast beam ventilation hole cleaning device for road construction comprises a circular support frame and two guide rods. The outer wall of each guide rod is provided with a spring, and the top end of each spring is in contact with the bottom surface of the fixing seat. This facilitates the pushing of the fixing seat by the two springs, and after the user removes the pressure on the control handle, the two springs lift the fixing seat to the highest position of the guide rod, facilitating the sequential cleaning of the plurality of ventilation holes in the precast beam body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the circular support frame structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the fixing base structure of this utility model;

[0017] Figure 5 This is an exploded structural diagram of the fixing disc and cutting blade of this utility model.

[0018] In the diagram: 1-circular support frame, 2-fixed plate, 3-spring, 4-fixed seat, 5-control handle, 6-bevel gear, 7-handwheel, 8-locking nut, 9-connecting shaft, 10-guide rod, 11-support leg, 12-cutting blade, 13-support block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0020] like Figures 1 to 5 As shown, a precast beam ventilation hole cleaning device for road construction includes a circular support frame 1, on both sides of its top surface, vertically placed guide rods 10. The top of the two guide rods 10 is equipped with a fixed seat 4 that can move vertically. Two vertically placed connecting shafts 9 are installed in the middle of the fixed seat 4. The two connecting shafts 9 have different lengths, with the longer connecting shaft 9 placed vertically and the shorter connecting shaft 9 placed horizontally. The adjacent ends of the two connecting shafts 9 are equipped with meshing bevel gears 6. One connecting shaft 9 extends into the interior of the circular support frame 1, and a fixed plate 2 is installed at its end. Multiple cutting blades 12 are installed at the edge of the bottom surface of the fixed plate 2. A handwheel 7 is installed at one end of the other connecting shaft 9.

[0021] The bottom surface of the circular support frame 1 is equipped with three support legs 11, and the bottom end of each of the three support legs 11 is equipped with a support block 13. The bottom end of each of the three support legs 11 is provided with multiple serrated protrusions. As an optional technical solution of this utility model, it is convenient to provide stable support for the circular support frame 1 through the three support blocks 13 and the support legs 11. At the same time, the multiple serrated protrusions can increase the friction between the support frame 1 and the precast beam, ensuring stability during the cleaning process. In addition, the three support legs 11 raise the placement height of the circular support frame 1, making it easier for the user to observe the relative positions of the multiple cutting blades 12 and the ventilation holes.

[0022] The outer wall of the two guide rods 10 is provided with a spring 3, and the top end of the two springs 3 is in contact with the bottom surface of the fixed seat 4, as an optional technical solution of the utility model, so that the fixed seat 4 is conveniently pushed by the two springs 3, and after the user withdraws the pressure on the control handle 5, the two springs 3 lift the fixed seat 4 to the highest position of the guide rod 10, so as to facilitate the sequential cleaning operation of the plurality of ventilation holes in the precast beam body.

[0023] The top end of the two guide rods 10 is provided with two locking nuts 8, as an optional technical solution of the utility model, so that the highest sliding position of the fixed seat 4 is conveniently limited, the two locking nuts 8 are installed in pairs at the top end of the guide rod 10, and the adjacent two locking nuts 8 are reversely rotated, so as to stabilize the position of the two locking nuts 8 and prevent the fixed seat 4 from sliding off the top end of the guide rod 10.

[0024] The side of the fixed seat 4 away from the hand wheel 7 is provided with a control handle 5, and the holding position of the control handle 5 is provided with a protective sleeve, as an optional technical solution of the utility model, so as to provide a holding position for the user, improve the holding comfort of the user, and facilitate the vertical movement of the fixed seat 4 along the two guide rods 10 and the entry of the cutting knife 12 into the ventilation hole.

[0025] The middle part of the fixed disc 2 is hollow, and the outer diameter of the fixed disc 2 is smaller than the inner diameter of the middle part of the circular support frame 1, as an optional technical solution of the utility model, so that the user can push the film between the plurality of cutting knives 12 out with a wooden stick or steel bar at a later stage, and the hollow structure of the fixed disc 2 can reduce the relative weight, and the circular support frame 1 and the guide rod 10 are combined with each other to reduce the relative weight, so that the whole is more portable.

[0026] The precast beam ventilation hole cleaning device for road construction needs the following steps when in use:

[0027] 1) When in use, the whole is transferred to the position of the ventilation hole by the control handle 5;

[0028] 2) The user holds the control handle 5 with one hand and moves the fixed seat 4 along the guide rod 10;

[0029] 3) The user rotates the hand wheel 7 with the other hand to drive the plurality of cutting knives 12 to rotate circumferentially and clean the film at both ends of the ventilation hole.

[0030] In summary, when the user uses, through the setting circular support frame 1, the top surface of which is provided with guide rod 10 on both sides, the fixed seat 4 is slidably connected with the guide rod 10, and two connecting shafts 9 are vertically placed, and the adjacent ends of the two are provided with meshing bevel gears 6, the fixed disc 2 is fixedly connected with the bottom end of the vertically placed connecting shaft 9, and then the circular support frame 1 is placed at the vent hole position of the prefabricated beam, the user rotates the hand wheel 7 with one hand, drives multiple cutting knives 12 to rotate, and controls the handle 5 to be pressed down, thereby facilitating the cleaning of the film at both ends of the vent hole, and the overall structure is simple, and the cleaning efficiency is effectively improved. Further, through the setting of the circular support frame 1 and the two guide rods 10, the outer walls of the two guide rods 10 are provided with springs 3, thereby facilitating the jacking of the fixed seat 4, and after the user removes the pressure, the two springs 3 jack up the fixed seat 4 to the highest position of the guide rod 10, thereby facilitating the sequential cleaning operation of multiple vent holes in the prefabricated beam body.

[0031] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A precast beam vent cleaning device for road construction, characterized by: The utility model provides a cutting device for cutting circular support frame, including the top surface of circular support frame (1), both sides are equipped with the vertical guide rod (10) of placing, two the top of guide rod (10) is equipped with the fixed seat (4) of vertical motion, the middle part of fixed seat (4) is equipped with two vertical connection shafts (9), two the adjacent end of connection shaft (9) is equipped with the bevel gear (6) of interlock, one connection shaft (9) goes into the inside of circular support frame (1), and its end is equipped with fixed disc (2), the edge of fixed disc (2) bottom is equipped with a plurality of cutting knives (12), and the one end of another connection shaft (9) is equipped with hand wheel (7).

2. The precast beam vent cleaning device for road construction of claim 1, wherein: The bottom of the circular support frame (1) is provided with three support legs (11), and the bottom of each of the three support legs (11) is provided with a support block (13), and the bottom of each of the three support legs (11) is provided with a plurality of sawtooth protrusions.

3. The precast beam vent cleaning device for road construction of claim 2, wherein: The outer wall of each of the two guide rods (10) is provided with a spring (3), and the top of each of the two springs (3) is in contact with the bottom of the fixed seat (4).

4. The precast beam vent cleaning device for road construction of claim 3, wherein: The top of each of the two guide rods (10) is provided with two locking nuts (8).

5. The precast beam vent cleaning device for road construction of claim 4, wherein: The side of the fixed seat (4) away from the hand wheel (7) is provided with a control handle (5), and the holding position of the control handle (5) is provided with a protective sleeve.

6. The precast beam vent cleaning device for road construction of claim 5, wherein: The middle part of the fixed disc (2) is hollow, and the outer diameter of the fixed disc (2) is smaller than the inner diameter of the middle part of the circular support frame (1).

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