CN114569920B - Oxygen pipeline flame arrester - Google Patents
Oxygen pipeline flame arrester Download PDFInfo
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- CN114569920B CN114569920B CN202210300073.7A CN202210300073A CN114569920B CN 114569920 B CN114569920 B CN 114569920B CN 202210300073 A CN202210300073 A CN 202210300073A CN 114569920 B CN114569920 B CN 114569920B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
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Abstract
The invention relates to a novel oxygen pipeline flame arrester, which comprises a flame arrester shell, wherein two ends of the flame arrester shell are respectively connected with a pipeline, and a fire control layer and a flame arresting layer are respectively and symmetrically arranged at two sides of the inside of the flame arrester shell; the fire control layer is provided with a grid structure with meshes, and the edge of the fire control layer is fixed with the inner wall of the flame arrester shell; the fire-retarding layer is arranged on the inner side of the fire-controlling layer and comprises elastic deformation balls and a grid net frame structure, a plurality of elastic deformation balls are restrained and placed inside the grid net frame structure, and the edge of the grid net frame structure is fixed with the inner wall of the fire-retarding device shell. When the pipeline on one side of the flame arrester is ignited or exploded, the fire is gentle and controllable after passing through the fire control layer, the elastic deformation small ball of the flame arrester layer is temporarily deformed and expanded due to negative pressure and high temperature, so that the original normal air passage is blocked, flame is prevented from being conducted to the other side of the valve, and the pipeline is prevented from continuously igniting and exploding in a continuous loop.
Description
Technical Field
The invention belongs to the technical field of safety equipment, and relates to a flame arrester suitable for an oxygen pipeline.
Background
Flame arresters are widely used in the mining, coal, water transportation and chemical industries. Flame arresters are widely used in petrochemical industry in various flammable and explosive storage tanks or pipelines. When the tank or pipe encounters an open fire or lightning strike, a fire may be caused.
The structure of traditional flame arrester mainly comprises flame arrester element (often called flame arrester core), flame arrester shell and flange. The fire-retardant core is used for preventing flame from passing through; the flame arrester housing is used for ensuring that the combustible gas flows through the flame arrester in a closed manner; the connecting flange is used for installing the flame arrestor on a field pipeline or a protected gas storage device.
The oxygen pipeline is usually positive pressure, and oxygen belongs to combustion-supporting gas and does not belong to combustible gas, so that the oxygen is not contained in the combustible gas or steam explosive mixture classification and grouping in the annex C of the explosion hazard environment electric power device design Specification GB50058-2014, but in industrial electric design, equipment related to oxygen is selected as explosion-proof equipment, and ExdIIBT4Gb type or more is usually selected.
According to the installation position, the fire arresters can be classified into pipe end fire arresters and pipeline fire arresters. The pipe end flame arrester is installed at the end part of the exhaust pipe, and the pipeline flame arrester is installed at the middle position of the pipeline. The flame arrestor is generally installed at the junction of the middle position of the pipeline, as shown in the figure, and is used for preventing flame from propagating to the other end of the pipeline when the tail end of the pipeline is ignited and exploded, whether deflagrated from A to B or from B to A. Under normal operating conditions, the gas in the conduit flows normally through the flame arrestor. When a deflagration accident occurs at one side of the pipeline, the volume of the gas in the pipeline can be greatly expanded due to the explosion effect, and the shock waves generated by the expanded gas can flow to the two ends of the pipeline at a speed which exceeds the normal flow speed by hundreds of times, so that the gas flows at the subsonic speed in the pipeline, and when the gas flows through the flame arrester, the flame arrester can be damaged and deformed, so that the flame arrester loses the fire-arresting capability, flame passes through the flame arrester, and the end of the pipeline without fire is also subjected to interlinked fire explosion. The flame arrester has the function of preventing flame from being conducted to the other side of the valve when one side of the flame arrester is on fire or explodes, and preventing the pipeline from continuously and continuously igniting and exploding.
Most of the existing flame arresters mainly comprise the following: (1) extinguishing a fire by blocking the flame; (2) extinguishing a fire by lowering the fire point; (3) extinguishing fire by the built-in chemical medium; (4) physical properties combined with chemical properties to extinguish fires.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel oxygen pipeline flame arrester, thereby achieving the aims of effectively preventing flame impact of oxygen deflagration and effectively preventing expansion of fire accidents.
In order to solve the technical problems, the invention adopts the following technical scheme:
an oxygen pipeline flame arrester comprises a flame arrester shell, wherein two ends of the flame arrester shell are respectively connected with a pipeline, and a fire control layer and a flame arrester layer are respectively and symmetrically arranged on two sides of the inside of the flame arrester shell;
the fire control layer is a grid net structure with meshes, and the edge of the fire control layer is fixed with the inner wall of the flame arrester shell;
the fire-retarding layer is arranged on the inner side of the fire-retarding layer and comprises elastic deformation balls and a grid net frame structure, the elastic deformation balls are restrained and placed in the grid net frame structure, and the edge of the grid net frame structure is fixed with the inner wall of the fire-retarding device shell; under the normal state without fire, the gaps among the elastic deformation pellets form a gas circulation channel; under the condition of fire, the elastic deformation pellets are expanded to block the gas circulation channel;
and an I-level buffer cavity is formed between the fire control layer and the fire resistance layer on the same side inside the fire resistance layer shell, and an II-level buffer cavity is formed between the two fire resistance layers.
Further, a balance ball is arranged in the II-level buffer cavity, and a gas circulation channel is formed between the balance ball and the inner wall of the flame arrester shell in a normal state without fire; in the fire state, the balance ball is expanded and contacts the inner wall of the flame arrester shell to block the gas flow passage.
Further, the elastically deformable beads are made of a thermoplastic polyurethane elastomer (TPU) material.
Further, the inside of the elastic deformation pellet is filled with inert gas.
Further, the expansion ball is made of a thermoplastic polyurethane elastomer (TPU) material.
Further, the inside of the expansion ball is filled with inert gas.
Further, flanges are respectively arranged at two ends of the flame arrester shell, and the flanges are connected with pipelines at two sides.
According to the invention, when the pipeline on one side of the flame arrester is ignited or exploded, the fire is gentle and controllable after passing through the fire control layer, and the elastic deformation pellets of the flame arrester layer are temporarily deformed and expanded by negative pressure and high temperature, so that the original normal air passage is blocked, the flame is prevented from being conducted to the other side of the valve, and the pipeline is prevented from continuously igniting and exploding in a continuous loop.
The invention uses physical method to extinguish fire, with high reliability. The flame arrester has qualified explosion-proof performance, and can prevent flame from passing through 15 continuous tests of subsonic flame. The fire resistance is qualified, and no tempering phenomenon exists after 2 hours of fire resistance test. The shell is qualified in water pressure test, and 3.0MPa is free from leakage in the water pressure test. Reasonable structure, light weight, easy maintenance and convenient installation.
The explosion-proof grade of the flame arrester can reach ExdIIBT4Gb type or above, and the protection grade can reach IP65 type or above.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention.
Fig. 1 is a front view of the external appearance of the oxygen pipeline flame arrester according to the present invention.
Fig. 2 is an internal cross-sectional view of an oxygen conduit flame arrester according to the present invention.
FIG. 3 is a schematic diagram of a fire control layer according to the present invention.
FIG. 4 is a schematic view of a fire barrier layer according to the present invention.
In the figure: 1-a flame arrester housing; 2-balancing balls; 3-a flange plate; 11-a fire control layer; 12-a fire barrier layer; 13-I stage buffer cavity; a 14-II stage buffer cavity; 120-elastically deformed pellets.
Detailed Description
For a better understanding of the present invention, reference will be made to the following description of the invention taken in conjunction with the accompanying drawings and examples. In addition, features in the embodiments and examples of the present application may be combined with each other without conflict.
The oxygen pipeline flame arrester provided by the typical embodiment of the invention comprises a flame arrester shell 1, wherein two ends of the flame arrester shell 1 are respectively connected with a pipeline, and a fire control layer 11 and a fire prevention layer 12 are respectively and symmetrically arranged at two sides of the inside of the flame arrester shell 1;
the fire control layer 11 is of a grid net structure with meshes, and the edge of the fire control layer 11 is fixed with the inner wall of the flame arrester shell 1;
the fire-retarding layer 12 is arranged at the inner side of the fire-controlling layer 11, the fire-retarding layer 12 comprises elastic deformation balls 120 and a grid net frame structure, the elastic deformation balls 120 are restrained and placed in the grid net frame structure, and the edge of the grid net frame structure is fixed with the inner wall of the fire-retarding device shell 1; in a normal state without ignition, the gaps between the elastically deformed beads 120 form gas circulation channels; in the fire state, the elastically deformable beads 120 are expanded to block the gas flow passage.
Inside the fire-resistant layer shell 1, a level I buffer cavity 13 is formed between the fire-control layer 11 and the fire-resistant layer 12 on the same side, and a level II buffer cavity 14 is formed between the two fire-resistant layers 12.
According to the above embodiment, when the gas in the oxygen-containing pipeline knocks, the volume of the gas in the pipeline is greatly expanded, and shock waves generated by the expanded gas flow to the two ends of the pipeline at a speed which exceeds the speed of hundreds times of the normal flow speed. When the deflagration flame reaches the fire control layer 11, the flame is divided into a plurality of flames by the grid net and becomes uniform, meanwhile, the fire is gentle and controllable, at the moment, the I-level buffer cavity 13 positioned between the fire control layer 11 and the fire blocking layer 12 is instantly ignited by gas, so that the volume of the gas in the I-level buffer cavity 13 is changed, but the I-level buffer cavity 13 is made of non-flammable high temperature resistant metal material, the volume of the gas is not changed, the I-level buffer cavity 13 can form a transient negative pressure state, the negative pressure further enables the elastic small ball 120 to be temporarily deformed and expanded due to the negative pressure and the high temperature, and the original normal air passage is blocked to achieve the purpose of fire blocking.
When the flame is extinguished, the gas returns to pass through the pipeline normally, the I-stage buffer cavity 13 is returned to a normal ventilation pressure state from a short negative pressure state, namely, the inside of the flame arrester returns to a state before gas deflagration, and the flame arrester can be used normally and continuously.
In the above embodiment, the flame arrester housing 1 is made of a non-flammable high temperature resistant metal material, and the two sides of the flame arrester housing 2 are symmetrically provided with concave necks. The mesh on the fire control layer 11 is preferably a square mesh. The grid mesh structure of the activation control layer 11 and the grid mesh frame structure of the fire-retardant layer 12 are made of nonflammable high temperature resistant metal materials. The fire control layer 11 and the fire retarding layer 12 (comprising the elastic deformation balls 120 and the grid net frame structure) are sprayed with fire-proof grease.
In a preferred embodiment, the elastically deformable beads 120 are made of a thermoplastic polyurethane elastomer (TPU) material with good elasticity, and can expand and contract according to the air pressure change state. The pellets are not full in a normal ventilation state, gas can normally pass through the pellets, the pellets deform in a deflagration state, and the deformation rate of the pellets is more than or equal to 98.6%.
The oxygen in the pipeline is neutral gas, and the oxygen does not cause great corrosion to the materials except slight oxidation.
In a preferred embodiment, a balance ball is placed in the class II buffer cavity, and in a normal state without fire, a gas circulation channel is formed by a gap between the balance ball and the inner wall of the flame arrester shell; in the fire state, the balance ball is expanded and contacts the inner wall of the flame arrester shell to block the gas flow passage.
The balance ball 2 is preferably made of thermoplastic polyurethane elastomer (TPU) materials with good elasticity, inert gas is filled in the ball body, deformation does not occur in a normal ventilation state, the gas can normally pass through, and the spherical deformation rate of the balance ball 2 can be ensured to be more than or equal to 99.99% in a deflagration state. The pressure balancing device is used for achieving the purpose of balancing the pressure of the flame arrester in the deflagration state.
An oxygen pipeline flame arrester as claimed in claim 2, wherein: the flange plates are respectively arranged at the two ends of the flame arrester shell and are connected with pipelines at the two sides.
The scope of the present invention is not limited to the above embodiments, but various modifications and alterations of the present invention will become apparent to those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (2)
1. An oxygen pipeline flame arrester comprises a flame arrester shell, wherein two ends of the flame arrester shell are respectively connected with a pipeline, and the oxygen pipeline flame arrester is characterized in that a fire control layer and a flame arrester layer are respectively and symmetrically arranged on two sides of the inside of the flame arrester shell;
the fire control layer is a grid net structure with meshes, and the edge of the fire control layer is fixed with the inner wall of the flame arrester shell;
the fire-retarding layer is arranged on the inner side of the fire-retarding layer and comprises elastic deformation balls and a grid net frame structure, the elastic deformation balls are restrained and placed in the grid net frame structure, and the edge of the grid net frame structure is fixed with the inner wall of the fire-retarding device shell; under the normal state without fire, the gaps among the elastic deformation pellets form a gas circulation channel; under the condition of fire, the elastic deformation pellets are expanded to block the gas circulation channel;
a first-level buffer cavity is formed between the fire control layer and the fire resistance layer on the same side inside the fire resistance layer shell, and a second-level buffer cavity is formed between the two fire resistance layers;
a balance ball is arranged in the II-level buffer cavity, and a gas circulation channel is formed by a gap between the balance ball and the inner wall of the flame arrester shell in a normal state without fire; in a fire state, the balance ball is expanded and then contacts the inner wall of the flame arrester shell to block the gas circulation channel;
the elastic deformation pellets are made of thermoplastic polyurethane elastomer TPU materials, and inert gas is filled in the elastic deformation pellets;
the balance ball is made of thermoplastic polyurethane elastomer TPU material, and inert gas is filled in the balance ball.
2. An oxygen pipeline flame arrester as claimed in claim 1, wherein: the flange plates are respectively arranged at the two ends of the flame arrester shell and are connected with pipelines at the two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210300073.7A CN114569920B (en) | 2022-03-25 | 2022-03-25 | Oxygen pipeline flame arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210300073.7A CN114569920B (en) | 2022-03-25 | 2022-03-25 | Oxygen pipeline flame arrester |
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| Publication Number | Publication Date |
|---|---|
| CN114569920A CN114569920A (en) | 2022-06-03 |
| CN114569920B true CN114569920B (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210300073.7A Active CN114569920B (en) | 2022-03-25 | 2022-03-25 | Oxygen pipeline flame arrester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115445122A (en) * | 2022-09-15 | 2022-12-09 | 郑州中泰安科粉体科技有限公司 | Fire arrester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102816427A (en) * | 2012-09-06 | 2012-12-12 | 北京化工大学 | High-flame-retardance high-heat-resistance halogen-free flame-retardant thermoplastic polyurethane elastomer cable material and preparation method thereof |
| EP3099382B1 (en) * | 2014-01-28 | 2023-09-06 | Elmac Technologies Limited | Flame arresters |
| CN211751996U (en) * | 2019-12-24 | 2020-10-27 | 江苏邦茨石化设备制造有限公司 | Anti-detonation type pipeline flame arrester |
| CN112786247A (en) * | 2020-12-31 | 2021-05-11 | 山东太平洋光纤光缆有限公司 | Photoelectric hybrid cable for fire-fighting unmanned aerial vehicle and preparation method thereof |
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