JPH09262769A - Lid for steel pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent grits from entering into a steel pipe and staying there by providing a lid to the steel pipe opening when the steel pipe is grit blasted. SOLUTION: (a) A ring shape rubber pipe 3 is provided on the gap between a disc shape outer lid 1 and an inner lid 2. (b) A fixed bar 4, of a rubber pipe 3 is provided on the inside of the outer lid 1 and the fixed bar 4 is inserted through a hole 5 bored on the inner lid 2 so that the center of the rubber pipe 3 may not slide. (c) A handle 6 is run through from the center of the outer lid 1 to the center of the inner lid 2 and a bolt on the end of the handle 6 is connected to a nut 7 welded to the inner lid 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a steel pipe lid for preventing grit from entering the steel pipe during blasting of the steel pipe.

[0002]

2. Description of the Related Art Conventionally, there is no lid for preventing grit from entering the steel pipe when the steel pipe is blasted.

[0003]

Conventionally, since the grit enters and stays in the steel pipe during blasting of the steel pipe, one of the steel pipes is lifted (or lifted) every time the blasting is completed.
Since the grit was leaked and removed, the work was time-consuming and the work efficiency was poor.

[0004]

[Means for Solving the Problems]

(B) A ring-shaped rubber tube is provided in the gap between the disk-shaped outer lid and the inner lid. (B) A rubber rod fixing rod is provided inside the outer lid so that the center of the rubber tube does not shift, and a hole is further opened in the inner lid.
Thread the fixed rod. (C) Pass the handle from the center of the outer lid to the center of the inner lid, and connect the bolt at the tip of the handle with the nut welded to the inner lid. A steel pipe lid having the above structure.

[0005]

【Example】

(B) Grip the handle and crimp the inside of the outer lid to the steel pipe mouth. (B) When the handle is rotated, the inner lid moves toward you and compresses the rubber tube. (In this case, the fixing rod also serves to prevent the guide rod of the inner lid and the inner lid from idling.) (C) Since the rubber pipe is deformed by compression and adheres to the inner surface of the steel pipe, the outer lid is fixed to the steel pipe mouth. To do. Elastic rubber may be used instead of the rubber tube.

[0006]

EFFECTS OF THE INVENTION By covering and blasting the steel pipe mouth, the grit does not enter and stay in the steel pipe, and the work efficiency is increased.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is an exploded view of the present invention.

FIG. 3

FIG. 4 is a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Outer lid 2 Inner lid 3 Rubber tube 4 Fixing rod 5 hole 6 Handle 7 Nut

Claims (1)

[Claims] 1. A ring-shaped rubber tube is provided in a gap between a disk-shaped outer lid and an inner lid. (B) A rubber rod fixing rod is provided inside the outer lid so that the center of the rubber tube does not shift, and a hole is further opened in the inner lid.
Thread the fixed rod. (C) Pass the handle from the center of the outer lid to the center of the inner lid, and connect the bolt at the tip of the handle with the nut welded to the inner lid. A steel pipe lid having the above structure.