Centrifugal integral cast metal mould for dual-tray flange straight pipes

A metal mold and integral casting technology, which is applied in the field of metal mold manufacturing, can solve the problems that cannot be completely eliminated, it is difficult to ensure the parallelism of the concentricity of the two flange holes, and the welding quality cannot be evaluated by the user, so as to achieve the completeness of the overall metallographic structure. Consistent and effective control of the wall thickness of the pipe body, which is conducive to the effect of protecting the environment

Active Publication Date: 2017-05-31
营口经济技术开发区爱维尔铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of welding double-disk flange pipes: (1) The material of the weld seam is inconsistent with that of the cast pipe body, and the strength of the "heterogeneous" weld seam is low
(2) Stress concentration in the welding area cannot be completely eliminated
(3) The flanges at both ends of the pipe are manually assembled before welding, and the size error is large; it is difficult to ensure the concentricity of the two flange holes and the parallelism of the disk surface due to the influence of thermal stress during the welding process
(4) At present, there is no evaluation standard for cast iron welds at home

Method used

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  • Centrifugal integral cast metal mould for dual-tray flange straight pipes
  • Centrifugal integral cast metal mould for dual-tray flange straight pipes
  • Centrifugal integral cast metal mould for dual-tray flange straight pipes

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053] Embodiment one

[0054] Cast PN16 with a centrifuge, the length is 5.8 meters, and the method of DN1000 double-disc flange straight pipe is:

[0055] (1) Mold preparation

[0056] A. According to the user's needs, prepare 1 set of PN16 tapered inserts at both ends of the DN1000 pipe mold, one set at each end, change the tapered inserts at both ends of the pipe mold, and the pipe fitting flange can be replaced with PN10, PN16, PN25, and the PN value is different ( pressure level), the thickness of the flange, the diameter of the bolt hole, and the number of holes are also different. At the same time prepare 3 sections of DN1000 transition pipe mold, the lengths are 5 meters, 0.5 meters and 0.2 meters respectively. The flange thickness of DN1000 and PN16 is 50 mm, and the total length is 5.8 meters, which meets the needs of customers;

[0057] B. Assemble and connect the segmented pipe molds, pay attention to the positioning pins, and the positioning table is intact; ...

Example Embodiment

[0070] Embodiment two

[0071] Use a centrifuge to cast PN10, DN200 single disc through-wall flange straight pipe, the length is 4.02 meters, and the length between the wall-through flange and the flange sealing surface is 2.01 meters. The method is:

[0072] (1) Mold preparation

[0073] A. According to the user's needs, prepare 1 set of DN200 pipe mold PN10 tapered inserts with flange and without flange, change the tapered inserts at both ends of the pipe mold, and the pipe flange can be replaced with PN10, PN16, PN25 , The PN value is different (pressure level), the thickness of the flange, the diameter of the bolt hole, and the number of holes are also different. At the same time, prepare DN200, 1 section of pipe mold with a length of 1 meter and a wall-through flange, 1 section of pipe mold with a length of 2 meters, and 1 section of pipe mold with a length of 1 meter and a socket. The position of the through-wall flange is accomplished by adjusting the length of the tr...

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PUM

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Abstract

A centrifugal integral cast metal mould for dual-tray flange straight pipes comprises a left tapered plug tray, a through-wall flange pipe borne mould, fastening bolts, a non-through-wall flange pipe mould, a wedge, a fitting pin, a resin sand withdrawal core, a transition section pipe mould and a right tapered plug tray; the resin sand withdrawal core is connectively mounted between the through-wall flange pipe borne mould and the non-through-wall flange pipe mould through the fastening bolts, the through-wall flange pipe borne mould and the transition section pipe mould are connected through the fastening bolts, the transition section pipe mould and the non-through-wall flange pipe are connected through the fastening bolts, and the resin sand withdrawal core is connectively mounted between the non-through-wall flange pipe mould and the right tapered plug tray through the fastening bolts. By the arrangement, the mould is combined and assembled in design, requirements of different through-wall flanges on position are met, mass production can be realized through horizontal centrifugal casting, market requirement is met, environment protection is facilitated, dust can be fully recycled, environment friendly casting is truly realized, and the centrifugal integral cast metal mould is applied to the technical field of centrifugal casting.

Description

technical field [0001] The invention relates to a centrifugal integral casting metal mold of a double-disk flange straight tube in the technical field of metal mold manufacturing, in particular to a centrifugal integral casting of a double-disc flange straight tube. Background technique [0002] At present, a large number of double disc flanges are used in pressure pipelines to connect with valves, fire hydrants, expansion joints, etc., and are widely used in metallurgy, mining, subway, chemical industry, sewage treatment and other industries. At present, most of the pressure-bearing water pipelines in the domestic and foreign markets use centrifugal ductile iron pipes. However, due to the difficulty of demoulding, the centrifugal integral casting of the double-flange centrifugal ductile iron pipe cannot be realized. Traditional centrifugal casting can only produce straight pipes with disk or socket, because the cast pipe formed by centrifugal casting needs to be pulled out...

Claims

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Application Information

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IPC IPC(8): B22D13/10B22D13/02
CPCB22D13/02B22D13/101
Inventor 孙辉李会谦
Owner 营口经济技术开发区爱维尔铸业有限公司
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