A manufacturing process of a fire-resistant breathing unit for ships

A fire-stopping and ship-building technology, which is applied in the field of ship parts and components, can solve problems such as the inability to ensure the normal breathing of oil tanks, achieve good economic and social benefits, and prevent flames from crossing each other.

Active Publication Date: 2018-09-18
JIANGSU KAITONG MARINE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to article 541.6.8 of GJB4000-2000 "General Rules for Ships", "Each oil tank should be installed with a stop valve or other isolation measures before entering the general venting device", CB / T3650-94 "Design Principles of Oil Tank Venting System" 3.2 .3 Clause stipulation: "When a combined system is adopted, an isolation device shall be set up between each liquid cargo tank and the common main pipe"; when the fire arresting device of the prior art is in operation, the normal breathing of the oil tank cannot be guaranteed

Method used

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  • A manufacturing process of a fire-resistant breathing unit for ships
  • A manufacturing process of a fire-resistant breathing unit for ships

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Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1, the calculation of the flow area of ​​the fire-blocking core layer of the fire-blocking assembly 9, the ventilation rate: ≥760 m³ / h, assuming that the gas flow rate is 7.5m / s (GJB4000 "General Specifications for Ships" 507.8.13 article: the flow rate in the air pipe No more than 7.6m / s); required flow area: 28148.15mm²; flow ratio of fire-resistant core layer: 0.38; diameter of fire-resistant core layer: 320mm (calculated as 307.11mm).

Embodiment 2

[0052] Embodiment 2, the sealing surface grinding technology, the fire retardant breathing unit is in the closed state, there should be no leakage, the surface roughness of the metal sealing surface is highly required, and the surface roughness determines the sealing performance of the product. The metal sealing surface must be ground to achieve Sealing performance requirements, adopt the following measures to ensure surface accuracy, 1) use wire seal; 2) ensure the surface roughness of the sealing surface during processing; 3) conduct research on the sealing surface; 4) correctly select abrasives; 5) use Appropriate grinding process; 6) After grinding, compare the grinding surface with a sample block for testing.

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PUM

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Abstract

The invention discloses a manufacturing technology of a flame-retardant breathing unit for ships. A manufacturing technology of a flame-retardant core layer of a flame-retardant assembly comprises operation steps as follows: A) the diameter of the flame-retardant core layer is determined according to the requirement of the ventilation volume of a pipeline; B) the flame-retardant core layer is manufactured as follows: 1) wavy mesh belts are manufactured by the aid of a mold; 2) flat-plate-shaped mesh belts are manufactured by the aid of a mold; 3) one wavy mesh belt and one flat-plate-shaped mesh belt are closely wound to form one core layer and cannot be loosened, and the surface of the core layer is flat, smooth and free of burrs; sizes of pores in the core layers of the flame-retardant core layer are completely uniform and consistent, and blockage is avoided; 4) the two core layers are combined into the flame-retardant core layer, and a runner in one core layer and a runner in the other core layer are arranged to form an angle; 5) all the pores of the flame-retardant core layer are required to be unblocked. With the technology, a breathing accessory of an oil compartment has a breathing function and a flame-retardant function, the pressure in the oil compartment is kept in a certain range in usual, and the oil compartment is protected.

Description

technical field [0001] The invention belongs to the technical field of ship parts and relates to a manufacturing process of a fire-resistant breathing unit for ships. Background technique [0002] With the development of the economy and the needs of national defense support, the number of naval ships is increasing, and the technical protection and safety precautions are becoming more and more important. Therefore, the Navy Equipment Department has put forward the requirements for the optimization and improvement of ship equipment. According to article 541.6.8 of GJB4000-2000 "General Rules for Ships", "Each oil tank should be installed with a stop valve or other isolation measures before entering the general venting device", CB / T3650-94 "Design Principles of Oil Tank Venting System" 3.2 .3 Clause stipulation: "When a combined system is adopted, an isolation device shall be set up between each cargo tank and the common main pipe"; the fire arresting device of the prior art ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/19
CPCF16K17/19
Inventor 范建国瘳世席于银娣杨宏彬
Owner JIANGSU KAITONG MARINE VALVE CO LTD
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