Drilling mould for flange connection hole at side of butterfly valve

Abstract

The invention relates to a drilling mould for a flange connection hole at the side of a butterfly valve, mainly comprising a ring-shaped drilling mould body and a drilling jig, wherein the ring-shaped surface of the drilling mould body is evenly distributed with drilling jig connection holes in cooperative connection with the drilling jig; and the concentric circle at one side of the drilling mould body is provided with a step table round spigot matched with the inner hole diameter of the butterfly valve body. The invention brings the beneficial effects of saving the labor and time consuming benchwork lining process and completing the drilling via directly installing the mould, guaranteeing the correct position of each hole and ensuring the interchangeability of the flange connection hole at the side of the butterfly valve. A double-row drilling jig connection hole design is adopted to satisfy the drilling demand of two flange connection holes with different specifications at the side of the butterfly valve, enlarge the using range and save the manufacturing cost.

Description

technical field [0001] The invention belongs to butterfly valve processing tooling, in particular to a tool for drilling flange connection holes on the side of a butterfly valve. Background technique [0002] The traditional production process of flange connection holes on the side of the butterfly valve is as follows: for each flange connection hole on the side of the butterfly valve, the fitter marks the holes one by one on the plate, and then moves to the vertical drill to drill holes. It is very troublesome for the fitter to mark the line. First, put a wooden block into the center circle of the butterfly valve to find the center point. Draw the concentric circles of the connecting holes of the side flange with a drawing planner, and then divide them equally on the concentric circles to draw the positions of the connecting holes. Very troublesome, labor-intensive and time-consuming. Especially for large-aperture butterfly valves, it is very difficult to move the workpie...

AI Technical Summary

Problems solved by technology

Very troublesome, labor-intensive and time-consuming

Especially for large-aperture butterfly valves, it is very difficult to move the workpiece when marking

At the same time, the accuracy of the position of each hole cannot be ensured when drilling, and it is difficult to ensure the interchangeability of the flange connection holes on the butterfly valve side

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