Ultralow-concentration gas conveying and fire retarding device
By setting up staggered fire baffles and heat-receiving plates in the gas conveying device and using dry powder extinguishing agent to extinguish the fire, the problem of poor fire resistance of existing devices in low-concentration gas environments is solved, and a more efficient fire-stopping effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU PANJIANG COAL BED GAS DEV UTILIZATION
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-14
AI Technical Summary
Existing gas conveying flame arrestors have poor fire resistance in low-concentration gas environments, which can easily ignite the gas in the next pipeline, posing a safety hazard.
The fire-arresting device, which uses staggered fire baffles and heat-receiving plates, has an inner core, including a fire-arresting structure. It uses the staggered through holes of the fire baffles to block the flames, and the heat-receiving plates absorb the heat of the flames to rupture the diaphragm and release dry powder extinguishing agent to extinguish the fire.
It improves the fire resistance of the flame arrestor, reduces flame transmission and effectively extinguishes fires, and reduces safety hazards.
Smart Images
Figure CN224113149U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fire prevention technology for gas pipelines, and specifically relates to a fire-arresting device for ultra-low concentration gas transportation. Background Technology
[0002] Most mine methane gas is transported via pipelines, with the pipeline outlets connected to users. Since the concentration of most extracted methane gas is below 30%, the methane gas in the pipeline is prone to combustion and explosion when exposed to fire, posing a certain safety hazard. Currently, existing methane transmission fire-resistant devices mainly use fire-resistant nets for fire prevention. However, if flames pass through the fire-resistant nets, they can easily ignite the methane gas in the next pipeline, resulting in poor fire resistance. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an ultra-low concentration gas conveying flame arrestor.
[0004] To achieve the above objectives, this utility model provides a flame arrestor for ultra-low concentration gas transportation, comprising two pipes, a flame arrestor structure provided in the middle of the two pipes, a connecting flange provided on the surface of the pipes, and the flame arrestor structure connected to the pipes via the connecting flange.
[0005] The fire-resistant structure includes a connecting shell disposed between two pipes, and the connecting shell has an inner core inside.
[0006] In the above technical solution, the inner core further includes two sets of three fire baffles. Both sets of fire baffles are fixedly connected to the inner wall of the connecting shell and are symmetrically distributed. The surface of the fire baffles is provided with uniformly distributed through holes. The through holes on the surfaces of two adjacent fire baffles are staggered. The staggered distribution of through holes on two adjacent fire baffles enables the flame to hit the surface of the next fire baffle when passing through the through holes, thereby achieving a good fire-stopping effect.
[0007] In the above technical solution, the inner core further includes a mounting shell fixedly connected between the two sets of fire baffles. The mounting shell has a storage cavity inside, and the storage cavity contains dry powder extinguishing agent. After the flame passes through the fire baffle, the heat-receiving plate absorbs the heat generated by the flame to reduce the temperature and reduce the transmission of the flame.
[0008] In the above technical solution, a mounting ring is fixedly connected to the inner side of the mounting shell, and a uniformly distributed heating plate is provided on the inner side of the mounting ring. Two symmetrically distributed notches are opened on the surface of the mounting ring. The heating plate can cause the diaphragm to rupture through heat, so that the dry powder extinguishing agent filled inside the storage cavity can be discharged through the notches.
[0009] In the above technical solution, the two ends of the heating plate pass through the two notches respectively and are fixedly connected to the inner wall of the storage cavity. The inner wall of the notch is fixedly connected with diaphragms that are staggered with the heating plate.
[0010] In the above technical solution, the inner side of the mounting shell is further provided with two symmetrically distributed retaining rings, and the heating plate is located between the two retaining rings.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] By setting up a fire-resistant structure, the heat-receiving plate can absorb the heat generated by the flame after it passes through the fire baffle, thereby reducing the temperature and reducing the transmission of the flame. Furthermore, the heat-receiving plate can cause the diaphragm to rupture through the heat, allowing the dry powder extinguishing agent filled inside the storage chamber to be discharged through the opening and fill the space between the two heat-receiving plates. During the discharge process, the dry powder extinguishing agent can be used to extinguish the flame, thus improving the fire-resistant effect of the device.
[0013] The staggered arrangement of through holes on two adjacent fire baffles allows flames to impact the surface of the next fire baffle as they pass through the through holes, achieving a good fire-stopping effect. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure proposed in this utility model;
[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention;
[0016] Figure 3 This invention provides a partial separation diagram of the fire-retardant structure.
[0017] Figure 4 This is a cross-sectional schematic diagram of the mounting shell for this utility model.
[0018] In the diagram: 1. Pipeline; 101. Connecting flange; 2. Flame-retardant structure; 201. Connecting shell; 21. Inner core; 2101. Fire baffle plate; 2102. Mounting shell; 2103. Retaining ring; 2104. Heating plate; 2105. Mounting ring; 2106. Diaphragm; 2107. Storage chamber. Detailed Implementation
[0019] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] like Figures 1-4The ultra-low concentration gas conveying flame arrestor shown includes two pipes 1, a flame arrestor structure 2 is provided in the middle of the two pipes 1, a connecting flange 101 is provided on the surface of the pipes 1, and the flame arrestor structure 2 is connected to the pipes 1 through the connecting flange 101.
[0021] The fire-resistant structure 2 includes a connecting shell 201 disposed between two pipes 1, and an inner core 21 is disposed inside the connecting shell 201.
[0022] Specifically, the connecting shell 201 has a threaded hole corresponding to the connecting flange 101, which can be threaded by passing a fastening bolt through the through hole on the connecting flange 101 and the threaded hole, thus realizing the installation of the two. The pipeline 1 is used for the transportation of low-concentration gas.
[0023] like Figures 1-4 As shown, the inner core 21 includes two sets of three fire baffles 2101. Both sets of fire baffles 2101 are fixedly connected to the inner wall of the connecting shell 201 and are symmetrically distributed. The surface of the fire baffles 2101 is provided with uniformly distributed through holes, and the through holes on the surface of two adjacent fire baffles 2101 are staggered.
[0024] When the gas inside one of the pipes 1 ignites, the flame will travel along the gas transport path inside the pipe 1. During this process, it can pass through the through holes on the fire baffle 2101. The staggered through holes can block the flame from passing through, thus improving the fire-resistant performance of the device.
[0025] like Figures 1-4 As shown, the inner core 21 also includes a mounting shell 2102 fixedly connected between the two sets of fire baffles 2101. The mounting shell 2102 has a storage cavity 2107 inside, and the storage cavity 2107 contains dry powder extinguishing agent.
[0026] An installation ring 2105 is fixedly connected to the inner side of the mounting shell 2102. A uniformly distributed heat-receiving plate 2104 is provided on the inner side of the installation ring 2105. Two symmetrically distributed notches are opened on the surface of the installation ring 2105.
[0027] The two ends of the heating plate 2104 have two openings that are fixedly connected to the inner wall of the storage cavity 2107. The inner wall of the openings is fixedly connected to diaphragms 2106 that are staggered with the heating plate 2104.
[0028] The inner side of the mounting shell 2102 is fixedly connected with two symmetrically distributed retaining rings 2103, and the heating plate 2104 is located between the two retaining rings 2103.
[0029] When combustion occurs inside pipe 1, if the flame passes through the fire baffle 2101 and enters the inner side of the mounting shell 2102, the heating plate 2104 can absorb the heat of the flame and cause the diaphragm 2106 to rupture through the heat. As a result, the dry powder extinguishing agent filled inside the storage chamber 2107 can be discharged through the opening, filling the space between the two heating plates 2104. Furthermore, the dry powder extinguishing agent can be used to extinguish the flame during the discharge process, thus improving the fire-resistant effect of the device.
[0030] Working principle: The installation of both can be achieved by fastening bolts through the through holes and threaded holes on the connecting flange 101. Pipe 1 is used to transport low-concentration gas. When the gas inside one of the pipes 1 ignites, the flame will be transmitted along the gas transport path inside pipe 1. During this process, it can pass through the through holes on the fire baffle 2101. The staggered through holes can block the flame from passing through. If the flame passes through the fire baffle 2101, it can enter the inside of the mounting shell 2102. At this time, the heating plate 2104 can absorb the heat of the flame and cause the diaphragm 2106 to rupture through the heat. Thus, the dry powder extinguishing agent filled in the storage chamber 2107 can be discharged through the notch and fill the space between the two heating plates 2104. In addition, the dry powder extinguishing agent can be used to extinguish the flame during the discharge process, which improves the fire-resistant effect of the device.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A flame arrestor for ultra-low concentration methane transportation, comprising two pipes (1), characterized in that, A fire-resistant structure (2) is provided in the middle of the two pipes (1), and a connecting flange (101) is provided on the surface of the pipes (1). The fire-resistant structure (2) is connected to the pipes (1) through the connecting flange (101). The fire-resistant structure (2) includes a connecting shell (201) disposed between two pipes (1), and the connecting shell (201) has an inner core (21) inside.
2. The ultra-low concentration gas conveying flame arrestor according to claim 1, characterized in that, The inner core (21) includes two sets of three fire baffles (2101). Both sets of fire baffles (2101) are fixedly connected to the inner wall of the connecting shell (201) and are symmetrically distributed. The surface of the fire baffles (2101) is provided with uniformly distributed through holes, and the through holes on the surfaces of two adjacent fire baffles (2101) are staggered.
3. The ultra-low concentration gas conveying flame arrestor according to claim 2, characterized in that, The inner core (21) also includes a mounting shell (2102) fixedly connected between the two sets of fire baffles (2101), and the mounting shell (2102) has a storage cavity (2107) inside, and the storage cavity (2107) contains dry powder fire extinguishing agent.
4. The ultra-low concentration gas conveying flame arrestor according to claim 3, characterized in that, The mounting shell (2102) is fixedly connected to the inner side of the mounting ring (2105), and the inner side of the mounting ring (2105) is provided with uniformly distributed heat-receiving plates (2104). The surface of the mounting ring (2105) has two symmetrically distributed notches.
5. The ultra-low concentration gas conveying flame arrestor according to claim 4, characterized in that, The two ends of the heating plate (2104) pass through the two notches respectively and are fixedly connected to the inner wall of the storage cavity (2107). The inner wall of the notch is fixedly connected with diaphragms (2106) that are staggered with the heating plate (2104).
6. The ultra-low concentration gas conveying flame arrestor according to claim 5, characterized in that, The inner side of the mounting shell (2102) is fixedly connected with two symmetrically distributed retaining rings (2103), and the heating plate (2104) is located between the two retaining rings (2103).