CN103350314A

CN103350314A - Repairing method for hollow shaft of disc filter

Info

Publication number: CN103350314A
Application number: CN 201310266045
Authority: CN
Inventors: 段建设; 曹林; 权建军
Original assignee: LUOYANG JIANHAO HEAVY MACHINERY Ltd Co
Current assignee: LUOYANG JIANHAO HEAVY MACHINERY Ltd Co
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2013-10-16

Abstract

A repairing method for a hollow shaft of a disc filter comprises the steps as follows: 1), a connecting bolt of a left flange group and a right flange group is opened, a left shaft end and a right shaft end are dismounted, a flange sealing pad is taken off, and the flange sealing pad is required to be replaced by a new flange asbestos pad if the flange sealing pad is damaged; 2), the circumference of a shaft body is cut off by a cutting torch, and welded junctions are cut up, so that the flanges, the shaft body and a seamless pipe can be separated; 3), a left flange and a right flange are taken off, and the seamless pipe and a pipe head are taken off from the shaft body; 4), a new seamless pipe component is welded, a patch is welded in the position of an impact point, 12 holes smaller than 40 is drilled in the seamless pipe, and a seam allowance is turned on the pipe head; 5), the seamless pipe is fixed in the central position of the shaft body; 6), flange plates at two ends are fixed on two sides of the shaft body according to marks; 7), the flanges at two ends are aligned by a water level and a frame level meter; 8), all welded junctions adopt full-length welding, and strength and sealing requirements are met; 9), an asbestos plate is taken as a flange pad; and 10), the shaft end is assembled, and two sides of the flange pad are coated with paint to facilitate sealing. A price difference between old shaft repairing and new shaft purchasing is about 45,000 yuan, so that a large number of capitals are saved for an enterprise with the adoption of the repairing method.

Description

A kind of restorative procedure of disk filter hollow shaft

Technical field

The present invention relates to the flight-line maintenance field, be specifically related to a kind of restorative procedure of disk filter hollow shaft.

Background technology

Vacuum shaft is the important accessory of coal preparation plant's flotation workshop filter, is the transmission skeleton, also is the passage that vacuum gas liquid is discharged; It makes filter fan suction and discharge water part by the negative pressure of vacuum of 10 seamless pipes in the axle.A new axle involves great expense, and life cycle only is about 1 year.

Summary of the invention

For solving the reparation difficult problem of disk filter hollow shaft, the invention provides a kind of method for maintaining, may further comprise the steps:

1) first left and right sides flange group connecting bolt is opened, pulled down left and right sides axle head, flange gasket is taken away, if breakage will renew the flange asbestos pad;

2) with cutting torch the axis body circumference is cut off, weld bond is cut open, flange, axis body, seamless pipe can be separated;

3) take away left and right flanges, seamless pipe and tube head are taken down from axis body;

4) be welded new seamless pipe assembly, and in shock point place soldering fourth, bore uniform 12 of＜40 holes, tube head car seam on the seamless pipe;

5) with seamless pipe fixedly the axis body situ put;

6) the two ends ring flange is fixed on the axis body both sides by mark;

7) with level and frame level centering two end flanges;

8) weld all weld bonds and all adopt full weld, and reach intensity, seal request;

9) do flange gasket with asbestos board;

10) assembling axle head, with the painting of flange gasket both sides in order to sealing.

Beneficial effect of the present invention is: repair an old axle and new axle price difference about 4.5 ten thousand yuan, adopting restorative procedure is that enterprise has saved substantial contribution.

Description of drawings

Fig. 1 vacuum shaft structure chart;

Fig. 2 seamless pipe schematic diagram.

The left axle head of Reference numeral: 1-, 2-flange, 3-axis body 4-seamless pipe, 5-tube head.

The specific embodiment

Below in conjunction with accompanying drawing to explanation of the present invention: shown in Fig. 1, this axle makes 10 seamless pipes formation negative pressure of vacuum in the axle by vavuum pump, filter fan links to each other with seamless pipe, the filter fan both sides are surrounded by 80 purpose filter screens, when filter fan forwards in the cleaned coal liquid, suct cleaned coal, water is discharged in lower one deck pipeline by the filter fan seamless pipe.

Method for maintaining may further comprise the steps:

1) first left and right sides flange group connecting bolt is opened as shown in Figure 1, pulled down left and right sides axle head, flange gasket (asbestos board) is taken away, if breakage will renew the flange asbestos pad;

2) with cutting torch A axis body circumference is cut off, weld bond C place is cut open, the D place cuts open, and flange, axis body, seamless pipe can be separated;

3) take away left and right flanges, will manage 4 and manage 5 and take down from axis body;

4) be welded new seamless pipe assembly, and in shock point place soldering fourth, as boring uniform 12 of＜40 holes, 1 tube head car seam on Fig. 2 seamless pipe;

5) with the fixing position, axis body 3 Central Plains of part 4;

6) the two ends ring flange is fixed on the axis body both sides by mark;

7) with level and frame level centering two end flanges;

9) do flange gasket with D=3 ~ 5 asbestos boards;

Claims

1. the restorative procedure of a disk filter hollow shaft is characterized in that may further comprise the steps:

5) with seamless pipe fixedly the axis body situ put;

6) the two ends ring flange is fixed on the axis body both sides by mark;

7) with level and frame level centering two end flanges;

9) do flange gasket with asbestos board;