An automatic sandblasting method for steel box girders

Abstract

The present invention discloses an automatic sandblasting method for steel box girders, which comprises the following steps: Step 1, a transport vehicle delivers the steel box girder to be processed to a turnover table indoors for fixation; Step 2, a spray gun on a fixing frame is used to complete the sandblasting work on the opposite two side surfaces of the outer surface of the steel box girder; Step 3, after the sandblasting of the outer surface of the steel box girder is completed, a sandblasting robot at the end of a telescopic rod is inserted into the steel box girder to perform sandblasting work on the opposite two side surfaces inside the steel box girder; Step 4, after the sandblasting of the two sides inside the steel box girder is completed, the turnover table rotates the steel box girder by 90°; Steps 2 and 3 are repeated to perform sandblasting on the surfaces to be processed inside and outside the rotated steel box girder; Step 5, after the sandblasting operation is completed, the steel box girder is sent out. By means of symmetric sandblasting on both sides, the present invention avoids the problem that a large amount of sandblasting residues fall onto the surface to be processed, affecting the sandblasting effect, and cooperates with the turnover table to process the surfaces to be sandblasted on the other two sides, greatly improving the sandblasting efficiency and quality.

Description

Technical Field

[0001] The present invention relates to an automatic sandblasting method for steel box girders, belonging to the technical field of sandblasting. Background Art

[0002] At present, rust removal and sandblasting of steel box girders have become a conventional technical means. During the sandblasting process, it is necessary to ensure that the surface roughness meets the process requirements. As an important technical index for inspecting sandblasting rust removal, the surface roughness directly affects the coating adhesion, which is related to the rust removal grade detection and anti-corrosion ability of the steel box girder. Sandblasting rust removal is the most basic and important link in the anti-corrosion treatment of steel box girders. However, a large amount of residues will be generated during the conventional sandblasting process. When they fall on the surface to be treated, they will change its surface roughness, affecting the final sandblasting rust removal effect and not meeting the requirements of the sandblasting process treatment for steel box girders. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to avoid the residues generated by sandblasting from falling on the surface to be treated and changing its surface roughness during the sandblasting process of the steel box girder.

[0004] To solve the above technical problem, the technical solution of the present invention is to provide an automatic sandblasting method for steel box girders, which is characterized by including the following steps:

[0005] Step 1: The transport vehicle sends the steel box girder to be treated to the turnover table in the room for fixation;

[0006] Step 2: Use the spray guns on the fixed frame to complete the sandblasting work on the two opposite side surfaces of the outer surface of the steel box girder. The spray guns can complete movements with multiple degrees of freedom on the fixed frames on both sides of the steel box girder;

[0007] Step 3: A telescopic boom of a heavy-duty manipulator is provided in the length direction of the steel box girder. A telescopic rod is provided on the telescopic boom of the heavy-duty manipulator, and a sandblasting robot is provided at the end of the telescopic rod. After the outer surface of the steel box girder is sandblasted, the sandblasting robot at the end of the telescopic rod is extended into the steel box girder to perform sandblasting work on the two opposite side surfaces inside the steel box girder;

[0008] Step 4: After the sandblasting on both sides inside the steel box girder is completed, the turnover table rotates the steel box girder by 90°. Repeat Steps 2 and 3 to perform sandblasting on the surfaces to be treated inside and outside the rotated steel box girder;

[0009] Step 5: After the sandblasting operation is completed, the steel box girder is sent out.

[0010] Preferably, a collection device for collecting abrasive in the room is provided below the fixed frame, the turnover table and the steel box girder. During the operation of Steps 1 to 4, the abrasive collected in the room is recycled through a mechanical screw.

[0011] Compared with the existing sandblasting technology, the present invention has the following beneficial effects:

[0012] The automatic sandblasting method for steel box girders provided by the present invention avoids the problem that a large amount of sandblasting residues fall onto the surface to be treated and affect the sandblasting effect by means of symmetric sandblasting on both sides. The sandblasting gun that can move on the fixed frame can be used to complete the sandblasting of the outer surface of the steel box girder. The sandblasting gun can move longitudinally, transversely and lift up and down on the fixed frame, realizing movements with multiple degrees of freedom. It can move in a large range on the surface of the steel box girder and work flexibly, realizing the sandblasting work on most positions of the outer surface of the steel box girder. For the treatment of the inside of the steel box girder, a sandblasting robot can be used. It is installed on a heavy telescopic boom manipulator and symmetric sandblasting is adopted on both sides. After completing one action, the turning table is used to treat the surfaces to be sandblasted on the other two sides. The entire technical solution not only greatly improves the sandblasting efficiency and quality, but also solves the problems that are difficult to avoid in the current sandblasting process. Detailed implementation manners

[0013] To make the present invention more obvious and understandable, preferred embodiments are provided and described in detail as follows.

[0014] The present invention provides an automatic sandblasting method for steel box girders, which includes the following steps:

[0015] Step 1: The transport vehicle delivers the steel box girder to be treated to the turning table in the room for fixation;

[0016] Step 2: The sandblasting gun on the fixed frame is used to complete the sandblasting work on the two opposite side surfaces of the outer surface of the steel box girder. The sandblasting gun can complete movements with multiple degrees of freedom on the fixed frames on both sides of the steel box girder, that is, the movement along the length direction and the up and down direction of the steel box girder;

[0017] Step 3: A heavy-duty manipulator telescopic arm is provided in the length direction of the steel box girder. A telescopic rod is provided on the heavy-duty manipulator telescopic arm, and a sandblasting robot is provided at the end of the telescopic rod; the telescopic rod enables the sandblasting robot to perform telescopic movement along the length direction of the steel box girder inside the steel box girder; when the sandblasting of the outer surface of the steel box girder is completed, the sandblasting robot at the end of the telescopic rod is extended into the steel box girder to perform the sandblasting work on the two opposite side surfaces inside the steel box girder;

[0018] Step 4: After the sandblasting of the two sides inside the steel box girder is completed, the turning table rotates the steel box girder by 90°; Steps 2 and 3 are repeated to perform sandblasting on the inner and outer surfaces to be treated of the rotated steel box girder;

[0019] Step 5: A collection device for collecting abrasives in the room is provided below the fixed frame, the turning table and the steel box girder. During the operation of Steps 1 to 4, the abrasives collected in the room are recycled by a mechanical screw, which is more efficient and environmentally friendly. After the sandblasting operation is completed, the steel box girder is sent out.

Claims

1. An automatic sandblasting method for steel box girders, characterized in that, It includes the following steps: Step 1: The transport vehicle delivers the steel box girder to be processed to the indoor turning platform for fixation; Step 2: Use the spray guns on the fixing frames to complete the sandblasting work on the two opposite side surfaces of the outer surface of the steel box girder. The spray guns can perform actions with multiple degrees of freedom on the fixing frames on both sides of the steel box girder; Step 3: A telescopic arm of a heavy-duty manipulator is provided in the length direction of the steel box girder. A telescopic rod is provided on the telescopic arm of the heavy-duty manipulator, and a sandblasting robot is provided at the end of the telescopic rod. After the outer surface of the steel box girder is sandblasted, the sandblasting robot at the end of the telescopic rod is extended into the steel box girder to perform sandblasting work on the two opposite side surfaces inside the steel box girder; Step 4: After the two sides inside the steel box girder are sandblasted, the turning platform turns the steel box girder by 90°. Repeat Steps 2 and 3 to sandblast the surfaces to be processed inside and outside the turned steel box girder; Step 5: After the sandblasting operation is completed, the steel box girder is sent out.

2. The automatic sandblasting method for steel box girders according to claim 1, characterized in that A collection device for collecting indoor abrasives is provided below the fixing frames, the turning platform and the steel box girder. During the operation of Steps 1 to 4, the abrasives collected indoors are recycled by a mechanical screw.