CN111686387A - Pipeline fire arrestor - Google Patents

Abstract

The invention provides a pipeline flame arrester, comprising: a cavity, one end of which is communicated with a pipeline port, and the other end is communicated with the atmosphere; a filter assembly is located in the cavity and is arranged at one end of the cavity that communicates with the atmosphere, It includes at least two fire-resisting walls, each of which is formed by superimposing multiple layers of filter screens; an air-jet assembly is located in the cavity and is arranged at one end of the cavity that communicates with the pipe, and the air-jet assembly can A purge gas is ejected toward the filter assembly. By arranging multiple fire-resisting walls, the subsequent fire-resisting walls can ensure complete fire-resistance when the first fire-resisting wall fails to completely block the sparks, thereby further improving the fire-resisting performance. In addition, the self-cleaning function of the flame arrester can be realized by setting the air jet assembly, effectively preventing the occurrence of fouling and fouling of the filter screen, saving the cost of manual maintenance, and meeting the requirements of fire and explosion protection for the discharge ports of various flammable and explosive media pipelines. requirements, a high degree of automation.

Description

Pipe flame arrester

technical field

The invention relates to the technical field of pipeline safety, in particular to a pipeline flame arrester.

Background technique

Pipeline flame arrester is also known as flame arrester. The function of pipeline flame arrester is to prevent external flames from escaping into pipelines containing flammable and explosive gases or to prevent flames from spreading between pipelines. For example, for the gas evacuating port of the hydrogen peroxide storage tank in the stainless steel pickling line, the hydrogen peroxide in the storage tank will be pumped out or received external supplements at any time during the production process, so that the gas evacuating port of the storage tank will balance the storage tank by inhaling or discharging gas. Due to internal and external pressure, considering that sparks may appear in complex environments, sparks are easily sucked into the storage tank when they are close to the degassing port. Therefore, it is necessary to block sparks through pipeline flame arresters to prevent the occurrence of safety accidents.

At present, the commonly used flame arrester in China is to use flanges to clamp multiple filters to form a flame arrester to prevent fire and sparks from entering the nozzle. However, this kind of flame arrester does not consider the environment and other factors. With the accumulation for a long time, the pipeline flame arrester will cause scaling or fouling problems. Equipment maintenance personnel are required to regularly check and purge the filter screen. The labor cost is high and the operation inconvenient.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pipeline flame arrester, which can not only meet the fire-proof and explosion-proof requirements of pipeline discharge ports of various flammable and explosive media, but also has the function of self-cleaning.

In order to achieve the above purpose, the present invention provides a pipeline flame arrester, comprising:

One end of the cavity is communicated with a pipe port, and the other end is communicated with the atmosphere;

A filter assembly, located in the cavity and disposed at one end of the cavity communicating with the atmosphere, includes at least two fire-blocking walls, each of which is formed by stacking multiple layers of filter screens;

The air jet assembly is located in the cavity and is arranged at one end of the cavity that communicates with the pipeline, and the air jet assembly is capable of jetting cleaning gas toward the filter assembly.

Optionally, the pipeline flame arrester further includes a gas supply device, the gas supply device is located outside the cavity, and the air jet assembly includes a gas collecting pan and a plurality of nozzles arranged at the bottom of the gas collecting pan, so The top of the gas collecting pan is communicated with the gas supply equipment through an air inlet pipe, one end of the nozzle is communicated with the gas collecting pan, and the other end is protruded toward the direction close to the jetting assembly to spray the jetting assembly. out cleaning gas.

Optionally, the air intake pipe is in the shape of a cross, the air collecting plate is located in the center of the air intake pipe, and the four ends of the air intake pipe respectively penetrate the side wall of the cavity and extend to the outside of the side wall, An end of at least one of the intake pipes communicates with the gas supply device.

Optionally, the pipeline flame arrester further includes a rotating member, the gas collecting disk communicates with the air intake pipe through the rotating member, and the rotating member can rotate and drive the gas collecting disk to rotate.

Optionally, the pipeline flame arrester further includes a programmable logic controller, the programmable logic controller is connected with the gas supply device and the rotating member to control the periodic start of the gas supply device and all the rotation of the rotating member.

Optionally, the nozzles are evenly distributed along the bottom of the gas collecting pan.

Optionally, two adjacent fire barriers are separated by a spacer ring, and the outer ring surface of the spacer ring is in contact with the inner wall of the cavity.

Optionally, an end of the cavity that communicates with the atmosphere is provided with a degassing port, and the diameter of the degassing port is smaller than the inner diameter of the spacer ring.

Optionally, a spacer is provided between two adjacent layers of the filter meshes so that there is a gap between the two adjacent layers of the filter meshes.

Optionally, the filter screen includes an annular thin steel sheet and a mesh sheet, and the mesh sheet is welded on the surface of the thin steel sheet.

Optionally, one end of the cavity is further provided with an end cap, one end of the end cap is connected with the cavity flange, and the other end is communicated with the pipe opening.

Optionally, a support ring is further provided in the cavity, one end of the support ring is abutted with the filter screen closest to the air jet assembly, and the other end is abutted with the end cover.

Optionally, the cleaning gas is nitrogen.

The invention provides a pipeline flame arrester, which has the following beneficial effects:

1) By setting up multiple fire-resisting walls, the subsequent fire-resisting walls can ensure complete fire-resistance when the first fire-resisting wall fails to completely block the sparks, thereby further improving the fire-resisting performance and higher safety;

2) The fire barrier formed by stacking multiple layers of filters has the advantages of being both breathable and impermeable to sparks, and is more practical.

3) The self-cleaning function of the flame arrester can be realized by setting the air jet assembly, which can effectively prevent the occurrence of fouling and fouling of the filter screen, save the cost of manual maintenance, and can meet the requirements of fireproof and explosion-proof pipeline discharge ports of various flammable and explosive media. requirements, a high degree of automation.

Description of drawings

1 is a schematic structural diagram of a pipeline flame arrester provided by an embodiment of the present invention;

2 is a schematic structural diagram of a filter screen provided by an embodiment of the present invention;

Among them, the reference numerals are:

10-cavity; 11-air vent; 20-filter screen; 30-end cover; 40-spacer; 50-spacer; 60-support ring; 70-gas supply equipment; ; 82 - rotating parts; 90 - intake pipe.

Detailed ways

The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become more apparent from the following description. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

As shown in FIG. 1 , this embodiment provides a pipeline flame arrester, including:

One end of the cavity 10 is communicated with a pipe port, and the other end is communicated with the atmosphere;

A filter assembly, located in the cavity 10 and disposed at one end of the cavity 10 that communicates with the atmosphere, includes at least two fire-blocking walls, each of which is formed by stacking multiple layers of filter screens 20;

The air jet assembly is located in the cavity 10 and is disposed at one end of the cavity 10 that communicates with the pipeline, and the air jet assembly is capable of jetting cleaning gas toward the filter assembly.

Specifically, the cavity 10 is the main structure of the pipeline flame arrester, and various functional components are arranged inside the cavity 10 . By making the fire-blocking wall into a pipe-type cavity 10, a flow channel section is formed, which is more conducive to realizing the blocking of sparks or fire. The shape of the cavity 10 may be cylindrical, square or other irregular shapes, which are not limited in this application. In this embodiment, the shape of the cavity 10 is cylindrical, the cavity 10 is a hollow structure, and its material is waterproof and corrosion-resistant material, such as stainless steel, which is not limited in this application.

Please continue to refer to FIG. 1 , one end of the cavity 10 is further provided with an end cover 30 , one end of the end cover 30 is flanged to the cavity 10 , and the other end communicates with the pipe opening. By arranging the end cover 30 , it is convenient to connect with the pipe opening, and at the same time, it is also convenient to replace components such as the filter screen 20 in the cavity 10 . In this embodiment, the end of the cavity 10 and the end of the end cover 30 are welded with a flange, and fasteners such as bolts pass through the threaded holes on the flange to realize the flange connection. Of course, the cavity 10 and the end cover 30 may also be detachable connection methods such as screw connection, snap connection, etc., which are not limited in this application. In addition, the cavity 10 may also be a structure integrally formed with the end cover 30 .

The filter assembly is used for filtering various sparks and sparks, preventing sparks and sparks from contacting with flammable and explosive gases, thereby avoiding safety accidents. Please continue to refer to FIG. 1 , in this embodiment, the number of the fire-resisting walls is two, and each of the fire-resisting walls is formed by stacking three layers of filter screens 20 . By setting up multiple fire barriers, the subsequent fire barrier can ensure complete fire barrier when the first fire barrier fails to completely block the sparks, thereby further improving fire barrier performance and higher safety. The fire barrier formed by stacking the multi-layer filters 20 has the advantages of being both breathable and impermeable to sparks, and is more practical. It should be understood that the present application does not impose any limitation on the number of the fire resistance walls and the number of filters 20 included in each of the fire resistance walls, which can be selected according to the fire resistance level and requirements.

In this embodiment, please refer to FIG. 2 , the filter screen 20 is circular, and the diameter of the filter screen 20 is substantially equal to the inner diameter of the cavity 10 , so that the filter screen 20 can be directly placed in the cavity inside body 10. The filter screen 20 includes an annular thin steel sheet and a mesh sheet, and the mesh sheet is welded on the surface of the thin steel sheet. The ring-shaped thin steel sheet is used as a support, so that the filter screen 20 is easy to fix and not easily deformed during the purging process.

Please continue to refer to FIG. 1 , a spacer 40 is disposed between two adjacent layers of the filter meshes 20 so that there is a gap between the two adjacent layers of the filter meshes 20 . The two adjacent layers of filter screens 20 are isolated by the spacer block 40, so that the fire resistance effect of the fire barrier wall is better, and the sparks are not easy to pass through. In this embodiment, the spacer 40 may be a complete annular structure, or may be a plurality of separated small spacers 40, for example, a plurality of spaced small spacers 40 are arranged along the circumferential direction of the filter screen 20, and also The isolation of two adjacent layers of filter screens 20 can be achieved.

Please continue to refer to FIG. 1 , two adjacent fire barriers are separated by a spacer ring 50 , and the outer ring surface of the spacer ring 50 is in contact with the inner wall of the cavity 10 . By arranging the spacer ring 50 to form a buffer zone between the two fire-resisting walls, it is beneficial to reduce the flow rate of the gas with sparks, so that the sparks are automatically cooled and extinguished, thereby improving the fire-resisting effect. In this embodiment, the spacer ring 50 has a certain thickness to ensure the distance between two adjacent fire barrier walls.

Further, an end of the cavity 10 that communicates with the atmosphere is provided with a degassing port 11 , and the diameter of the degassing port 11 is smaller than the inner diameter of the spacer ring 50 . It should be understood that, under a fixed pressure, the flow rate of the flowing medium will change with the change of the cross-sectional area of the flow pipe. Since the diameter of the air purging port 11 is smaller than the inner diameter of the spacer ring 50 , the diameter of the air purging port 11 must be smaller than the inner diameter of the cavity 10 . When sparks or sparks enter the cavity 10 from the air-repellent port 11 , the flow pipeline of the sparks suddenly becomes larger, which can effectively reduce the flow rate of the gas with sparks, so that the sparks automatically cool down and extinguish. At the same time, the decelerated gas will also reduce the impact on the firewall, thus ensuring that the spark is completely blocked by the second or subsequent firewalls.

Please continue to refer to FIG. 1 , the cavity 10 is further provided with a support ring 60 , one end of the support ring 60 is in contact with the filter screen 20 closest to the cleaning component, and the other end is in contact with the end cover 30 . The support ring 60 is used for pressing the filter screen 20 in the cavity 10 to prevent the filter screen 20 from loosening and failing.

In this embodiment, the pipeline flame arrester further includes an air jet assembly, which is located in the cavity 10 and is arranged at one end of the cavity 10 that communicates with the pipe, and the air jet assembly can filter toward the filter The assembly emits purge gas. The self-cleaning function of the flame arrester can be realized by providing the air jet assembly, which effectively prevents the occurrence of fouling and fouling of the filter screen 20 and saves the cost of manual maintenance. At the same time, by means of self-cleaning, the pipeline flame arrester provided by the present application can be used in different occasions, and can be used for fire and explosion-proof requirements of pipeline discharge ports of various flammable and explosive media, and can also be used for mobile larger container combined type Pipeline discharge port for oxygen and acetylene bottles; it can also be used in complex environments, and is equipped with a strong oxidant - hydrogen peroxide storage tank - on the top of the gas evacuating pipe port. At the same time, the hydrogen peroxide storage tank that can only be installed in the fireproof and explosion-proof closed range can be placed in ordinary places and put into production and operation. This avoids special investment in the construction of fire and explosion-proof sites, saves construction costs, and reduces the maintenance cost of periodically replacing pipeline flame arresters, providing a more reliable way for the use of flammable and explosive mobile gas cylinders in large construction sites. protective measures.

In this embodiment, the air jet assembly is farther away from the air purging port 11 than the filter assembly, so that the air jet assembly can discharge the purged dirt from the air purging port 11 .

Please continue to refer to FIG. 1 , the pipeline flame arrester further includes a gas supply device 70 , and the gas supply device 70 is located outside the cavity 10 . A plurality of nozzles 81 at the bottom of the gas collecting plate 80, the top of the gas collecting plate 80 is communicated with the gas supply device 70 through an air inlet pipe 90, one end of the nozzle 81 is communicated with the gas collecting plate 80, and the other end faces the gas collecting plate 80. The direction of the air jet assembly extends to spray the cleaning gas to the air jet assembly.

In this embodiment, the gas supply device 70 is used for supplying cleaning gas, and the cleaning gas is, for example, nitrogen gas or other non-flammable gas, which is not limited in this application. In this embodiment, the gas supply device 70 is, for example, an air compressor, which can provide compressed gas, so that the purging force of the compressed gas is stronger, and it is convenient to remove the dirt on the filter screen 20 .

The gas collecting tray 80 is used to receive the gas provided by the gas supply device 70 and distribute the gas to a plurality of nozzles 81 to achieve a comprehensive purging of the filter screen 20, and the purging is performed simultaneously by setting a plurality of nozzles 81 , the purging efficiency is higher and the purging effect is better. In this embodiment, the shape of the gas collecting disk 80 is, for example, a disk shape or an ellipsoid, and there is a chamber for accommodating gas inside.

The nozzles 81 are evenly distributed along the bottom of the gas collecting plate 80 , so that the gas ejected from the nozzles 81 can evenly purge the filter screen 20 . In this embodiment, the number of the nozzles 81 is three, and the bottoms of the three gas collecting discs 80 are evenly distributed in a triangular shape. It should be understood that the present application does not impose any limitation on the number and distribution of the nozzles 81 . In this embodiment, the nozzle 81 may be a structure integrally formed with the gas collecting plate 80 , or may be connected to the gas collecting plate 80 , for example, by means of screw connection. In addition, the nozzle 81 can also be designed to be a 360° rotatable structure, so that the nozzle 81 has a larger purging area and no dead corners are left during purging.

Please continue to refer to FIG. 1 , the intake pipe 90 is cross-shaped, the gas collecting plate 80 is located in the center of the intake pipe 90 , and the four ends of the intake pipe 90 penetrate through the side wall of the cavity 10 respectively. And extending to the outside of the side wall, the end of at least one of the air inlet pipes 90 is communicated with the gas supply device 70 . In this embodiment, the air intake pipe 90 can not only deliver cleaning gas to the gas collecting plate 80 , but also can suspend the gas collecting plate 80 to realize the fixing and positioning of the gas collecting plate 80 .

In this embodiment, the air inlet pipe 90 is an integral molding structure, and an air outlet is provided at the center of the air inlet pipe 90 , and the air outlet is used for connecting the air collecting plate 80 to provide the air collecting plate 80 purge gas. Alternatively, the intake pipe 90 can be formed by connecting four pipes through a connecting joint, for example, a joint having five through holes.

In this embodiment, the four ends of the air inlet pipe 90 respectively penetrate through the side wall of the cavity 10 and extend to the outside of the side wall, and at least one end of the air inlet pipe 90 is communicated with the gas supply device 70 , and the other ends that are not in communication with the gas supply device 70 can be sealed by plugs to serve as backup air inlets.

Please continue to refer to FIG. 1 , the pipeline flame arrester further includes a rotating member 82 , the gas collecting plate 80 communicates with the air intake pipe 90 through the rotating member 82 , and the rotating member 82 can rotate and drive the collecting The air disc 80 rotates. When the filter screen 20 needs to be purged, the gas collecting plate 80 is driven to rotate by the rotating member 82, thereby driving the nozzle 81 to rotate, so that the cleaning gas blown by the nozzle 81 can be blown more evenly to the The filter screen 20 is described to improve the cleaning effect. The rotating member 82 includes, for example, a connecting rod and a bearing, the bearing is sleeved outside the connecting rod, the connecting rod is two-way through the air inlet pipe 90 and the gas collecting plate 80 , and the outer ring of the bearing rotates and drives the The gas collecting plate 80 rotates.

Further, the pipeline flame arrester also includes a programmable logic controller, the programmable logic controller is connected with the gas supply device 70 and the rotating member 82 to control the periodic start of the gas supply device 70 and the rotation of the rotating member 82 . Regular cleaning of the filter screen 20 can be realized through the programmable logic controller, and the degree of automation is higher.

To sum up, an embodiment of the present invention provides a pipeline flame arrester, comprising: a cavity, one end of which is communicated with a pipeline port, and the other end is communicated with the atmosphere; One end of the atmosphere includes at least two fire-resisting walls, each of which is formed by stacking multiple layers of filter screens; an air jet assembly is located in the cavity and is arranged at one end of the cavity that communicates with the pipeline, The air jet assembly is capable of jetting cleaning gas toward the filter assembly. By setting up multiple fire barriers, the subsequent fire barrier can ensure complete fire barrier when the first fire barrier fails to completely block the sparks, thereby further improving fire barrier performance and higher safety. The fire barrier formed by stacking multiple layers of filters has the advantages of being both breathable and impermeable to sparks, and is more practical. The self-cleaning function of the flame arrester can be realized by arranging the air jet assembly, which effectively prevents the occurrence of fouling and fouling of the filter screen, and saves the cost of manual maintenance. At the same time, by means of self-cleaning, the pipeline flame arrester can meet the fire-proof and explosion-proof requirements of pipeline discharge ports of various flammable and explosive media, and does not require manual periodic inspection and cleaning, and has a high degree of automation.

The above are only preferred embodiments of the present invention, and do not have any limiting effect on the present invention. Any person skilled in the art, within the scope of not departing from the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, and does not depart from the technical solution of the present invention. content still falls within the protection scope of the present invention.

Claims (13)

1. a pipeline flame arrester, is characterized in that, comprises: One end of the cavity is communicated with a pipe port, and the other end is communicated with the atmosphere; A filter assembly, located in the cavity and disposed at one end of the cavity communicating with the atmosphere, includes at least two fire-blocking walls, each of which is formed by stacking multiple layers of filter screens; The air jet assembly is located in the cavity and is arranged at one end of the cavity that communicates with the pipeline, and the air jet assembly is capable of jetting cleaning gas toward the filter assembly. 2. The pipeline flame arrester according to claim 1, characterized in that, the pipeline flame arrester further comprises a gas supply device, the gas supply device is located outside the cavity, and the air jet assembly comprises a gas collecting plate and a set of A plurality of nozzles at the bottom of the gas collection pan, the top of the gas collection pan is communicated with the gas supply device through an air inlet pipe, one end of the nozzles is communicated with the gas collection pan, and the other end faces toward the gas collection pan The direction of the air jet assembly protrudes to jet the cleaning gas to the air jet assembly. 3 . The pipeline flame arrester according to claim 2 , wherein the air intake pipe is in the shape of a cross, the air collecting plate is located in the center of the air intake pipe, and the four ends of the air intake pipe respectively penetrate through the pipe. 4 . The side wall of the cavity is extended to the outside of the side wall, and the end of at least one of the air inlet pipes is communicated with the gas supply device. 4 . The pipeline flame arrester according to claim 2 , wherein the pipeline flame arrester further comprises a rotating member, the gas collecting plate is communicated with the air intake pipe through the rotating member, and the rotating member can Rotate and drive the gas collecting disc to rotate. 5. The pipeline flame arrester according to claim 4, characterized in that, the pipeline flame arrester further comprises a programmable logic controller, and the programmable logic controller is connected with the gas supply device and the rotating member In order to control the periodic starting of the gas supply device and the rotation of the rotating member. 6. The pipeline flame arrester of claim 2, wherein the nozzles are evenly distributed along the bottom of the gas collecting pan. 7 . The pipeline flame arrester according to claim 1 , characterized in that, a spacer ring is used to separate the two adjacent fire barrier walls, and the outer ring surface of the spacer ring is in contact with the inner wall of the cavity. 8 . . 8 . The pipeline flame arrester according to claim 7 , wherein an end of the cavity that communicates with the atmosphere is provided with a degassing port, and the diameter of the degassing port is smaller than the inner diameter of the spacer ring. 9 . 9 . The pipeline flame arrester according to claim 1 , wherein a spacer is provided between the two adjacent layers of the filter screens so that there is a gap between the two adjacent layers of the filter screens. 10 . 10. The pipeline flame arrester according to claim 1 or 9, wherein the filter screen comprises an annular thin steel sheet and a mesh sheet, and the mesh sheet is welded on the surface of the thin steel sheet. 11. The pipeline flame arrester according to claim 1, wherein one end of the cavity is further provided with an end cover, one end of the end cover is connected with the cavity flange, and the other end is connected with the pipeline mouth connection. 12 . The pipeline flame arrester according to claim 11 , wherein a support ring is further provided in the cavity, one end of the support ring is in contact with the filter screen closest to the air jet assembly, and the other end is in contact with the filter screen. 13 . The end caps are in contact with each other. 13. The pipeline flame arrester of claim 1, wherein the purge gas is nitrogen.

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