Gas pipeline dry powder fire extinguishing and explosion suppression system

Abstract

The dry powder fire extinguishing and explosion suppression system for the gas pipeline is installed in a gas conveying pipeline or an exhaust pipeline and comprises an explosion suppression device, a controller and a fire detector, the controller is electrically connected with the explosion suppression device and the fire detector, the explosion suppression device comprises a nitrogen storage bottle arranged at one end of the explosion suppression device, and the nitrogen storage bottle is connected with the controller. The nitrogen storage bottle is connected with the powder storage barrel through a container valve, the powder storage barrel is connected with the nozzle, a first sealing membrane is arranged in the container valve, a second sealing membrane is arranged between the powder storage barrel and the nozzle, and a starting electric detonator is installed on the outer side of the container valve. The explosion suppression system is low in investment cost, short in explosion suppression reaction time and capable of effectively blocking explosion and combustion in time, and therefore the range of disasters is prevented from being expanded.

Description

Technical Field

[0001] The utility model belongs to the field of explosion prevention of gas pipelines, and particularly relates to a dry powder fire extinguishing and explosion suppression system for gas pipelines. Background Art

[0002] Since the industrialized mining of coal mines began, with the continuous increase in coal mine output, gas accidents have occurred frequently. Even worse, coal dust explosions caused by gas flash explosions have also occurred frequently, resulting in major mine disasters. Accidents such as gas fires, flash explosions, and coal dust explosions in coal mine shafts have seriously endangered the physical and mental health and lives of underground workers, bringing heavy economic losses and casualties to coal mining enterprises.

[0003] Once a gas explosion occurs, the generated explosion wind can easily blow up the deposited coal dust to form a coal dust cloud and detonate it, resulting in a coal dust explosion. Coal dust explosions often have the characteristic of continuous propagation, which can expand the scope of damage and cause greater harm. Therefore, while taking measures to prevent gas explosions, technical measures to prevent the expansion of the gas explosion range should also be considered. In China, in terms of technical measures to prevent the expansion of the gas and coal dust explosion range, there are mainly three sets of technologies: the method of spreading rock powder, passive explosion isolation technology (passive water bag shed (tank)), and automatic explosion isolation technology. However, all of these three technologies have the problems of high input costs, long explosion suppression reaction time, and inability to more effectively and timely block explosions and combustion, thereby preventing the expansion of the disaster range.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] The purpose of the present utility model is to overcome the above-mentioned shortcomings of the prior art. The dry powder fire extinguishing and explosion suppression system for gas pipelines proposed by the present utility model has developed a system integrating a gas fire extinguishing and explosion suppression device, a controller, and a gas detector, so as to integrate monitoring and suppression functions, control and reduce the gas explosion range, and permanently solve the mine disasters caused by coal dust explosions caused by gas explosions, and protect the safety of underground coal miners as much as possible, thereby reducing, minimizing, or even eliminating mine disasters and casualties caused by gas explosions, and significantly reducing the economic property losses of coal mining enterprises caused by gas accidents.

[0006] A dry powder fire extinguishing and explosion suppression system for gas pipelines of the present utility model is installed in a gas transmission pipeline or an exhaust air pipeline, and includes: an explosion suppression device, a controller, and a fire detector. The controller is electrically connected to the explosion suppression device and the fire detector respectively. The explosion suppression device includes: a nitrogen storage bottle arranged at one end of the explosion suppression device, a nozzle arranged at the other end. The nitrogen storage bottle is connected to a powder storage cylinder through a container valve. The powder storage cylinder is connected to the nozzle. A first sealing diaphragm is arranged in the container valve, and a second sealing diaphragm is arranged between the powder storage cylinder and the nozzle. A starting electric detonator is installed outside the container valve.

[0007] Furthermore, a puncturing needle connected to a spring is also provided inside the container valve. When the fire detector transmits the received fire signal to the controller, the controller transmits an electric explosion start signal to the starting electric explosion tube, and the impact force generated by the detonation of the starting electric explosion tube pushes the puncturing needle to pierce the first sealing diaphragm.

[0008] Furthermore, a plurality of spray holes are formed in the nozzle.

[0009] Furthermore, an axial pressure gauge is installed outside the container valve.

[0010] Furthermore, the axial pressure gauge is electrically connected to the controller for real-time monitoring of the storage pressure in the nitrogen storage bottle and feeding back the monitored pressure signal to the controller.

[0011] Furthermore, a fixed flange is installed outside the powder storage cylinder, and a direct injection mounting seat is arranged outside the nitrogen storage bottle. The direct injection mounting seat and the fixed flange are fixed by a pull rod.

[0012] Furthermore, a protective cover is arranged along the outside of the explosion suppression device, and both ends of the protective cover are fixedly connected to the fixed flange and the direct injection mounting seat respectively.

[0013] Furthermore, multiple groups of the explosion suppression system are installed in the gas transmission pipeline or the exhaust air pipeline.

[0014] The utility model has the following advantages compared with the prior art:

[0015] 1. For the explosion suppression system of the utility model, by installing multiple groups in the gas transmission pipeline or the exhaust air pipeline, generally one group is installed every 15 - 20 meters. During the gas explosion process, the explosion suppression devices in the tunnel are started to play a role of layer-by-layer blocking, minimizing the disaster range as much as possible and preventing larger-scale disasters and mine accidents from occurring;

[0016] 2. In the explosion suppression device of the utility model, by separately arranging the nitrogen storage bottle and the powder storage cylinder, once the starting electric explosion tube receives the starting electric signal and detonates, the effect of instantaneously spraying dry powder for explosion suppression can be achieved, and the reaction speed is rapid;

[0017] 3. For the utility model, the impact force generated by the detonation of the starting electric explosion tube pushes the puncturing needle to pierce the first sealing diaphragm, and the set second sealing diaphragm is very thin and does not require puncturing operation. When the second sealing diaphragm is subjected to the nitrogen impact force of 3.6 - 4.2 Mpa, it can be instantly damaged;

[0018] 4. The explosion suppression system of the utility model has a structure integrating detection and explosion suppression, and can achieve the purpose of rapid detection and rapid explosion suppression. Description of the Drawings

[0019] The accompanying drawings herein are incorporated into and constitute a part of this specification, and are used together with the specification to explain the principles of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a connection schematic diagram of the dry powder fire extinguishing and explosion suppression system for gas pipelines of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the explosion suppression device in the dry powder fire extinguishing and explosion suppression system for gas pipelines of the present utility model;

[0023] Figure 3 is an installation schematic diagram of the explosion suppression device in the dry powder fire extinguishing and explosion suppression system for gas pipelines of the present utility model.

[0024] Wherein: 1-container valve; 2-axial pressure gauge; 3-powder storage cylinder; 4-second sealing diaphragm; 5-nitrogen storage bottle; 6-initiating electric detonator; 7-protective cover; 8-nozzle; 9-pull rod; 10-fixed flange; 11-direct injection mounting seat; 12-gas pipeline flange. Specific embodiments

[0025] The following will describe the implementation schemes of the present utility model in detail in combination with the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present utility model and should not be regarded as limiting the scope of the present utility model.

[0026] According to the embodiments of the present utility model, in combination with the attached Figures 1-3As shown, according to an embodiment of the present invention, a dry powder fire extinguishing and explosion suppression system for a gas pipeline is installed in a gas transmission pipeline or an exhaust pipeline, and includes: an explosion suppression device, a controller, and a gas detector. The controller is electrically connected to the explosion suppression device and the gas detector respectively. The explosion suppression device includes: a nitrogen storage bottle 5, a protective cover 7, a container valve 1, a starting electric blasting tube 5, a powder storage cylinder 3, a pull rod 9, a sealing diaphragm, a direct injection mounting seat 11, and a nozzle 8. The nitrogen storage bottle 5 is arranged at one end of the explosion suppression device, and the nozzle 8 is arranged at the other end. The nitrogen storage bottle 5 is connected to the powder storage cylinder 3 through the container valve 1, and the powder storage cylinder 3 is connected to the nozzle 8. A first sealing diaphragm is arranged in the container valve 1, and a second sealing diaphragm 4 is arranged between the powder storage cylinder 3 and the nozzle 8. A starting electric blasting tube 6 is installed outside the container valve 1. A puncturing needle connected to a spring is also arranged in the container valve 1. When the fire detector transmits the received fire signal to the controller, the controller transmits an electric blasting start signal to the starting electric blasting tube 6, and the impact force generated by the detonation of the starting electric blasting tube 6 pushes the puncturing needle to puncture the first sealing diaphragm.

[0027] According to an embodiment of the present invention, a plurality of spray holes are formed in the nozzle 8.

[0028] According to an embodiment of the present invention, an axial pressure gauge 2 is further installed outside the container valve 1. The axial pressure gauge 2 is electrically connected to the controller and is used to monitor the storage pressure in the nitrogen storage bottle 5 in real time and feedback the monitored pressure signal to the controller.

[0029] According to an embodiment of the present invention, a fixed flange 10 is installed outside the powder storage cylinder 3, and a direct injection mounting seat 11 is arranged outside the nitrogen storage bottle 5. The direct injection mounting seat 11 and the fixed flange 10 are fixed through a pull rod 9.

[0030] According to an embodiment of the present invention, a protective cover 7 is arranged along the outside of the explosion suppression device, and both ends of the protective cover 7 are fixedly connected to the fixed flange 10 and the direct injection mounting seat 11 respectively.

[0031] Furthermore, multiple groups of the explosion suppression systems are installed in the gas transmission pipeline or the exhaust pipeline.

[0032] According to the embodiments of the present utility model, the main performance parameters of the dry powder fire extinguishing and explosion suppression device for gas pipelines in the present utility model are as follows: 1. Operating environment temperature: -40°C to 50°C; 2. Storage pressure: 4.2 MPa; 3. Minimum operating pressure: 3.6 MPa; 4. Maximum operating pressure: 4.5 MPa; 5. Dry powder storage capacity: 2 kg; 6. Storage volume: 8 L; 7. Driving gas: nitrogen; 8. Spraying efficiency: >80%; 9. Spraying lag time: ≤5 ms; 10. Spraying completion time: ≤60 ms; 11. Initiation voltage: DC 5V 800 mA.

[0033] According to the embodiments of the present utility model, the installation area of the dry powder fire extinguishing and explosion suppression system for gas pipelines in the present utility model is as follows: 1. Installed inside the gas transmission pipeline or exhaust pipeline; 2. When there are disasters such as flash explosions due to excessive gas concentration at the plugging part of coal mine collection, install a gas concentration detection device (the device will also alarm and spray to block the occurrence of disasters when the gas concentration exceeds the standard), an optical detection device (it will also spray and block when a flash explosion occurs), etc. alarm systems and the dry powder ultra-fine fire extinguishing and explosion suppression device for gas pipelines in the present utility model (the goal is to block large-scale explosions and rescue underground personnel) within 15 - 20 meters from the plug; install a light and shock wave detector and a dry powder ultra-fine fire extinguishing and explosion suppression device for gas pipelines every 15 meters in the tunnel area more than 20 meters away from the plug. Two to three groups in the entire tunnel are sufficient to achieve layer-by-layer blocking, prevent coal dust explosions and the spread of disasters to other tunnels, and achieve the purpose of disaster prevention and rescue. That is, during the process of gas explosion, the fire extinguishing and explosion suppression devices in the tunnel are activated to play a layer-by-layer blocking role, minimizing the scope of disasters as much as possible and preventing larger-scale disasters and mine accidents from occurring.

[0034] According to the embodiments of the present utility model, the installation reference of the dry powder fire extinguishing and explosion suppression device for gas pipelines in the present utility model Figure 3 As shown, first, connect the device to the gas pipeline flange 12 with a fixed flange and M20 bolts; secondly, adjust the distance that the nozzle 8 extends from the gas pipeline flange 12 so that the distance between the spray holes around the nozzle 8 and the gas pipeline flange 12 is between 5 - 8 cm, and the spraying direction of the nozzle 8 is directly facing the inner wall of the gas discharge pipe.

[0035] According to an embodiment of the present utility model, when the controller receives a fire signal input by a fire detector, it outputs a start signal to the start electric detonator 6 on the dry powder fire extinguishing and explosion suppression device for the gas pipeline. The impact force generated by the detonation of the start electric detonator 6 pushes the puncture needle in the container valve 1 towards the nitrogen storage bottle 5 to puncture the second sealing diaphragm 4. At this time, the nitrogen in the nitrogen storage bottle 5 flushes into the powder storage cylinder 3. The dry powder in the powder storage cylinder 3 directly breaks through the first sealing diaphragm under the drive of high-pressure nitrogen and reaches the nozzle 8, and is sprayed into the gas pipeline through the spray holes on the nozzle 8 for explosion suppression. An axial pressure gauge 2 or a pressure switch is provided on the container valve 1 of the dry powder fire extinguishing and explosion suppression device for the gas pipeline. When the storage pressure in the nitrogen storage bottle 5 is monitored in real time through the axial pressure gauge 2, and when the pressure is lower than the lower limit setting (3.6 MPa), the axial pressure gauge 2 outputs an electrical signal to the controller to prompt that the pressure in the nitrogen storage bottle 5 is insufficient. An axial pressure gauge 2 is provided on the container valve 1 of the dry powder fire extinguishing and explosion suppression device for the gas pipeline. The storage pressure in the nitrogen storage bottle 5 is monitored in real time through the axial pressure gauge 2. When it is monitored that the pressure in the nitrogen storage bottle 5 is lower than the lower limit setting value: 3.6 MPa, the axial pressure gauge 2 outputs an electrical signal to the controller to prompt that the pressure in the nitrogen storage bottle 5 is insufficient, and then this nitrogen storage bottle 5 needs to be replaced.

[0036] When the dry powder fire extinguishing and explosion suppression system for the gas pipeline of the present utility model discovers a fire, the time used by the detection system is within 5 milliseconds, and the explosion spraying and suppression time is 20 to 50 milliseconds, that is, the work of rapid detection, rapid spraying, and rapid fire extinguishing and explosion suppression is solved within 60 milliseconds.

[0037] According to an embodiment of the present utility model, the start electric detonator 6 should be removed during the transportation of the explosion suppression device of the present utility model, and a limit screw of M10×25 should be used to prevent the piston from driving the puncture needle to act mistakenly; during installation, all components of the device are strictly prohibited from being knocked, especially the axial pressure gauge 2 or pressure switch, filling valve, and start electric detonator 6 on the container valve, etc.; when the device is fixed, the arrow direction on the container end face should be checked again to ensure that the arrow direction is upward; the wiring of the start electric detonator 6 should be carried out after the system installation and commissioning are completed to avoid accidentally starting the device during the commissioning process.

[0038] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A dry powder fire extinguishing and explosion suppression system for gas pipelines, which is installed in gas transmission pipelines or exhaust pipelines, and is characterized in that, Including: An explosion suppression device, a controller, and a fire detector, where the controller is electrically connected to the explosion suppression device and the fire detector respectively. The explosion suppression device includes: a nitrogen storage bottle (5) provided at one end of the explosion suppression device, a nozzle (8) provided at the other end. The nitrogen storage bottle (5) is connected to a powder storage cylinder (3) through a container valve (1). The powder storage cylinder (3) is connected to the nozzle (8). A first sealing diaphragm is provided in the container valve (1), and a second sealing diaphragm (4) is provided between the powder storage cylinder (3) and the nozzle (8). An initiating electric detonator (6) is installed outside the container valve (1).

2. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 1, characterized in that A puncturing needle connected to a spring is also provided in the container valve (1). When the fire detector transmits the received fire signal to the controller, the controller transmits an electric detonation start signal to the initiating electric detonator (6), and the impact force generated by the detonation of the initiating electric detonator (6) pushes the puncturing needle to puncture the first sealing diaphragm.

3. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 1, wherein A plurality of spray holes are provided on the nozzle (8).

4. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 1, wherein, An axial pressure gauge (2) is also installed outside the container valve (1).

5. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 4, wherein, The axial pressure gauge (2) is electrically connected to the controller, and is used to monitor the storage pressure in the nitrogen storage bottle (5) in real time and feedback the monitored pressure signal to the controller.

6. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 1, wherein A fixed flange is installed outside the powder storage cylinder (3), and a direct injection mounting seat (11) is provided outside the nitrogen storage bottle (5). The direct injection mounting seat (11) and the fixed flange (10) are fixed by a pull rod (9).

7. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 6, characterized in that, A protective cover (7) is provided along the outside of the explosion suppression device, and both ends of the protective cover (7) are fixedly connected to the fixed flange (10) and the direct injection mounting seat (11) respectively.

8. The dry powder fire extinguishing and explosion suppression system for gas pipelines according to claim 1, characterized in that, Multiple groups of the explosion suppression systems are installed in the gas transmission pipeline or the exhaust air pipeline.

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