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Manhole processing technology for a liquid storage tank

A hole processing and liquid storage tank technology, which is applied in the field of manhole production and processing, can solve the problems of not being able to achieve airtightness, affecting the airtightness of manholes, and damage to the base metal weld bead, so as to achieve less labor costs and lower costs Low, the effect of protection against leakage

Active Publication Date: 2020-08-28
黄骅市润宇汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the time on the market, two steel flanges are butted, welded and then punched, but the process is more complicated, the cycle is longer, and the cost is higher.
At present, aluminum is also used for manhole processing, but the more aluminum is welded, the more defects will occur, which will affect the airtightness of the manhole as a whole, damage the base metal weld bead during repair and affect the appearance, and stress deformation during welding cannot be avoided. Welders have very high technical requirements, otherwise the airtightness effect cannot be achieved

Method used

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  • Manhole processing technology for a liquid storage tank
  • Manhole processing technology for a liquid storage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A process for manhole processing of a liquid storage tank, comprising the following process steps:

[0034] 1) Take the aluminum raw material, preheat and keep it warm for a period of time, then continue to heat up to 530°C and then push it into the plate mold for extrusion molding;

[0035] 2) The formed aluminum material discharged from the discharge port on one side of the plate mold is sent to the heat dissipation area through the transmission device, and cooled to room temperature (air cooling is adopted, and the cooling time is at least 1h) to obtain the initial product (see figure 1 , the cross-section of the formed aluminum material is "]" shape);

[0036] 3) The initial product is bent and rolled into a circular aluminum material of specified specifications by a rolling machine (see figure 2 ); the rolling machine adopts vertical double rollers to roll the initial product, the lower roller shaft is the driving roller connected with the motor, the upper part i...

Embodiment 2

[0041] A process for manhole processing of a liquid storage tank, comprising the following process steps:

[0042] 1) Take the aluminum raw material, preheat and keep it warm for a period of time, then continue to heat up to 550°C and then push it into the plate mold for extrusion molding;

[0043] 2) The formed aluminum material discharged from the discharge port on one side of the plate mold is sent to the heat dissipation area through the transmission device, and cooled to room temperature (air cooling is adopted, and the cooling time is at least 1h) to obtain the initial product (see figure 1 , the cross-section of the formed aluminum material is "]" shape);

[0044] 3) The initial product is bent and rolled into a circular aluminum material of specified specifications by a rolling machine (see figure 2 ); the rolling machine adopts vertical double rollers to roll the initial product, the lower roller shaft is the driving roller connected with the motor, the upper part i...

Embodiment 3

[0049] A process for manhole processing of a liquid storage tank, comprising the following process steps:

[0050] 1) Take the aluminum raw material, preheat and keep it warm for a period of time, then continue to heat up to 550°C and then push it into the plate mold for extrusion molding;

[0051] 2) The formed aluminum material discharged from the discharge port on one side of the plate mold is sent to the heat dissipation area through the transmission device, and cooled to room temperature (air cooling is adopted, and the cooling time is at least 1h) to obtain the initial product (see figure 1 , the cross-section of the formed aluminum material is "]" shape);

[0052] 3) The initial product is bent and rolled into a circular aluminum material of specified specifications by a rolling machine (see figure 2 ); the rolling machine adopts vertical double rollers to roll the initial product, the lower roller shaft is the driving roller connected with the motor, the upper part i...

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Abstract

The invention proposes a manhole processing technology of a liquid storage tank. The manhole processing technology comprises the following steps of taking an aluminum raw material, performing pre-heating and heat preservation for a certain time, continuing to rise a temperature to 500-550 DEG C, and pushing the aluminum raw material into a plate die for extrusion and formation; sending a formed aluminum product discharged through a discharging hole in one side of the plate die to a cooling region by a transmission device, and cooling to a room temperature to obtain an initial product; bendingand grinding the initial product to show a round aluminum product with designated specification by a press rolling machine; and welding gaps of an initial end and a tail end of the round aluminum product, performing numerical control punching according to different specification requirements, and performing subsequent fine processing to obtain a manhole. By reasonable raw material selection and preparation and process and parameter improvement, the welding passage is reduced by 90%, the airtight effect is good, the process period is effectively shortened, time and labor are saved, the manholeis integrally formed, is high in stability, good in comprehensive mechanical property and low in cost and is simple and convenient to operate, and industrial application is facilitated.

Description

technical field [0001] The invention relates to the technical field of manhole production and processing, in particular to a manhole processing technology for a liquid storage tank. Background technique [0002] Manholes refer to the openings on the sides of oil tanks and liquid storage tanks, which are opened for personnel to enter the tank for maintenance, cleaning and other operations. Tank wall manholes and cored manholes, etc. Manholes are generally made of 304, 316L stainless steel plates or carbon steel. [0003] The manhole is a safety emergency ventilation device installed on the top of the storage tank. It is usually used in conjunction with a fire extinguisher and a mechanical breathing valve. It has the function of safety fire resistance and is a safety device to protect storage tanks, especially suitable for vaulted atmospheric pressure tanks whose storage materials are capped with nitrogen. It has the advantages of constant pressure discharge, constant press...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王军
Owner 黄骅市润宇汽车配件有限公司
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