CN113521626A - Explosion-proof type automatic tracking location efflux extinguishing device - Google Patents
Explosion-proof type automatic tracking location efflux extinguishing device Download PDFInfo
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- CN113521626A CN113521626A CN202110815262.3A CN202110815262A CN113521626A CN 113521626 A CN113521626 A CN 113521626A CN 202110815262 A CN202110815262 A CN 202110815262A CN 113521626 A CN113521626 A CN 113521626A
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- explosion
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- fire extinguishing
- air bag
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses an explosion-proof automatic tracking and positioning jet flow fire extinguishing device, which adopts the technical scheme that the device comprises a controller, a flame sensor, an alignment positioning mechanism and an injection mechanism, wherein the injection mechanism is fixed on the alignment positioning mechanism and moves along with the alignment positioning mechanism; the explosion-proof injection assembly comprises an explosion-proof proportional electromagnetic valve, an explosion-proof spray head, an explosion-proof powder pipe, an explosion-proof sleeve and an air bag. The fire extinguishing device can quickly extinguish fire and prevent explosion from spreading.
Description
Technical Field
The invention relates to the field of fire extinguishing equipment, in particular to an explosion-proof type automatic tracking and positioning jet fire extinguishing device.
Background
Explosion suppression (explosion suppression) facilities are typically deployed in chemical plants, warehouses where explosive materials are stored, and passageways filled with explosive gases. For example, in a coal mine underground roadway, explosive gas such as gas is usually filled, once an explosion is sent, continuous explosion can be formed, and therefore explosion suppression facilities need to be arranged. The existing explosion suppression facilities are usually explosion suppression water sheds, the explosion suppression water sheds extinguish fire and prevent the spread of explosion by absorbing heat generated by explosion, however, the passive fire extinguishing efficiency mainly depends on the vaporization speed of moisture, and the higher the vaporization efficiency is, the larger the heat generated by explosion is, and the more violent the explosion is. Because the water of water canopy and the reasons such as the area of contact of air is limited, the vaporization efficiency of moisture is lower all the time for the violent degree of explosion, and the speed of moisture vaporization is less than explosion propagation speed, is difficult to realize quick fire extinguishing usually, also is difficult to prevent continuous explosion to the water canopy needs regularly to clear up the coal dust of surface of water, because the water canopy hangs in the top, and the clearance degree of difficulty is big.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an explosion-proof type automatic tracking and positioning jet fire extinguishing device which can quickly extinguish fire and prevent explosion from spreading.
In order to achieve the purpose, the invention provides the following technical scheme: an explosion-proof automatic tracking and positioning jet fire extinguishing device comprises a controller, a flame sensor, an alignment positioning mechanism and an injection mechanism, wherein the injection mechanism is fixed on the alignment positioning mechanism and moves along with the alignment positioning mechanism, the injection mechanism is externally connected with a high-pressure gas source pipeline, gas in the high-pressure gas source pipeline is flame-retardant gas, the flame sensor is used for sensing flame and sending a flame position signal to the controller, the controller is used for controlling the alignment positioning mechanism to move and controlling the injection mechanism to spray and extinguish fire, the injection mechanism comprises a fire extinguishing injection assembly and an explosion-proof injection assembly, the fire extinguishing injection assembly comprises a fire extinguishing proportion electromagnetic valve and a fire extinguishing nozzle, and the fire extinguishing proportion electromagnetic valve is connected with the high-pressure gas source pipeline and the fire extinguishing nozzle;
the explosion-proof injection assembly comprises an explosion-proof proportional electromagnetic valve, an explosion-proof spray head, an explosion-proof powder pipe, an explosion-proof sleeve pipe and an air bag, wherein the explosion-proof spray head, the explosion-proof powder pipe, the explosion-proof proportional electromagnetic valve and the high-pressure air source pipeline are sequentially connected, fire extinguishing powder is filled in the explosion-proof powder pipe, the explosion-proof sleeve pipe is detachably connected onto the explosion-proof spray head, a contact pin is connected onto the explosion-proof sleeve pipe in a sliding manner, the sliding direction of the contact pin is the radial direction of the explosion-proof sleeve pipe, at least one part of the contact pin is made of a magnetic material, an elastic piece is arranged between the contact pin and the explosion-proof sleeve pipe and used for providing elasticity to enable the contact pin to slide out of the explosion-proof sleeve pipe, an electromagnet and two conducting rings are further fixed on the inner side wall of the explosion-proof sleeve pipe, and the two conducting rings are arranged at intervals along the length direction of the explosion-proof sleeve pipe, one conducting ring is externally connected with one stage of a power supply device, the other conducting ring is electrically connected with the electromagnet and then externally connected with the other pole of the power supply device, and the contact pin is driven by magnetic force to be inserted into the explosion-proof sleeve in the power-on state of the electromagnet;
the airbag comprises a neck and a tail which are mutually connected, the wall thickness of the neck is greater than that of the tail, the neck is positioned in an explosion-proof sleeve, the neck is connected with the explosion-proof spray head, two rubber rings are arranged on the neck and used for limiting the expansion of the neck, the two rubber rings are arranged at intervals along the length direction of the neck, a plurality of conductive strips are arranged between the two rubber rings, the conductive strips are arranged at intervals along the annular shape of the neck, the airbag is arranged in a multilayer manner, the conductive strips are positioned between any two layers, the length direction of the conductive strips is the length direction of the neck, two ends of the conductive strips are respectively provided with a metal conductive thimble, one end of each metal conductive thimble is fixed with the conductive strips, and the other end of each metal conductive thimble penetrates through the airbag and faces the conductive strips; when the air bag bulges and the neck between the two rubber rings does not bulge outwards, the two metal conductive thimbles of the conductive strip do not contact the two conductive rings simultaneously; when the tail part is impacted by air pressure generated by explosion so that the neck part between the two rubber rings bulges outwards, the two metal conductive thimbles of the conductive strip move outwards and respectively contact the two conductive rings;
the controller comprises a valve control module, the valve control module is provided with a valve control strategy, the valve control strategy comprises a fire extinguishing step, an explosion prevention step and a dilution step, the fire extinguishing step comprises the steps that after the controller controls the alignment positioning mechanism to move so that the fire extinguishing nozzle aligns to flame, the fire extinguishing proportional electromagnetic valve is controlled to be completely opened, and meanwhile, the explosion prevention proportional electromagnetic valve is controlled to be opened at a small flow rate and enters the explosion prevention step; the explosion-proof step comprises the steps that the controller monitors the air pressure in the air bag through the pressure sensor, and when the air pressure is increased to reach a preset critical air pressure upper limit value, the controller controls the explosion-proof proportional electromagnetic valve to be closed and enters the dilution step; and the dilution step comprises the step that when the controller monitors that the pressure in the air bag is increased firstly and then is instantly reduced to the pressure outside the air bag, the explosion-proof proportional electromagnetic valve is controlled to be completely opened.
As a further improvement of the present invention, the explosion-proof step further includes that after the explosion-proof proportional solenoid valve is closed, the controller monitors that the air pressure in the air bag gradually decreases to reach a preset critical air pressure lower limit value through the pressure sensor, the controller controls the explosion-proof proportional solenoid valve to be opened again at a small flow rate, and when the air pressure in the air bag reaches a preset critical air pressure upper limit value again, the controller closes the explosion-proof proportional solenoid valve.
As a further improvement of the invention, the outer side wall of one end of the explosion-proof spray head, which is used for being connected with the air bag, is provided with a conical outer wall, the small outer diameter end of the conical outer wall faces the air bag, and the conical outer wall is sleeved with the neck.
As a further improvement of the invention, the explosion-proof sleeve is in threaded connection with the explosion-proof spray head, a conical inner wall is arranged on the inner side wall of the explosion-proof sleeve, the taper of the conical inner wall is consistent with that of the conical outer wall, and when the explosion-proof sleeve is screwed on the explosion-proof spray head, the conical inner wall and the conical outer wall clamp the neck part.
As a further improvement of the invention, elastic rubber layers are arranged on both the conical inner wall and the conical outer wall.
As a further improvement of the present invention, the middle of the conductive strip in the length direction is bent toward the outside of the neck.
As a further improvement of the invention, two ends of the explosion-proof powder pipe are detachably connected with the explosion-proof spray head and the explosion-proof proportional electromagnetic valve, and the explosion-proof powder pipe is provided with a pressure release valve.
As a further improvement of the invention, a sliding groove is arranged on the explosion-proof sleeve, the sliding groove is communicated with the inner wall of the explosion-proof sleeve, the contact pin comprises a sliding block and a needle point, the sliding block is slidably connected in the sliding groove, the sliding block is made of a magnetic material, the needle point is fixed at one end of the sliding block facing the air bag, the elastic element is arranged between the sliding block and the inner wall of the sliding groove, and the needle point completely enters the sliding groove under the elastic force of the elastic element.
As a further improvement of the invention, a blocking piece for blocking the port is arranged at one end of the explosion-proof sleeve far away from the explosion-proof spray head, the blocking piece is inserted on the explosion-proof sleeve, and the air bag pushes the blocking piece to be separated from the explosion-proof sleeve under the state of continuously bulging.
As a further improvement of the invention, the fire extinguishing spraying assembly further comprises a fire extinguishing powder pipe, the fire extinguishing powder pipe is positioned between the fire extinguishing proportion electromagnetic valve and the fire extinguishing spray head, and fire extinguishing powder is filled in the fire extinguishing powder pipe.
The invention has the beneficial effects that:
1. when the flame generated by fire or the flame generated by explosion is detected, the fire extinguishing spraying assembly is adjusted to the position aligned with the flame through the alignment positioning mechanism and sprays flame-retardant gas, so that the flame generated by fire extinguishing or explosion is extinguished, and the propagation of explosion is prevented.
2. After detecting the fire, when the injection subassembly of putting out a fire puts out a fire, explosion-proof injection subassembly pushes away the powder of putting out a fire in with explosion-proof powder pipe to in aerifing the gasbag, because the wall thickness of neck is greater than the wall thickness of afterbody, the inflation process gasbag takes place the inflation earlier, continuously inflates the gasbag until gasbag internal pressure reaches critical pressure upper limit value, under this atmospheric pressure, if the afterbody of gasbag receives the extrusion and will lead to the neck between two rubber rings to swell. If the explosion happens after the explosion for the second time or after the explosion happens, the air pressure generated by the explosion impacts the tail part of the compressed air bag, so that the neck part is bulged, the metal conductive thimbles on the conductive strips are respectively contacted with the two conductive rings, at the moment, the electromagnet is electrified to adsorb the contact pin to slide in the explosion-proof sleeve so as to puncture the air bag, and the fire extinguishing powder and the flame retardant gas in the air bag instantly fill a large-range space, so that the flame generated by the explosion is rapidly extinguished and the propagation of the explosion is prevented.
3. When the air bag explodes, the pressure in the air bag is instantly reduced, the dilution step of the valve control strategy is triggered at the moment, the explosion-proof proportional electromagnetic valve is opened, the explosion-proof valve starts to spray flame-retardant gas, the fire extinguishing powder diffused in the air is pushed to a farther space by the power carried by the sprayed flame-retardant gas, and the space range of the fire extinguishing powder is further enlarged. Meanwhile, the sprayed flame-retardant gas can dilute the concentration of combustible gas or harmful gas such as gas in the air, and the fire extinguishing nozzle and the explosion-proof nozzle extinguish fire simultaneously, so that the fire extinguishing efficiency is improved.
4. When the air bag swells and reaches the critical air pressure upper limit value, the neck does not bulge outwards at the moment, a gap exists between the metal conductive thimble and the two conductive rings, at the moment, if the air bag is blown by wind and inclines towards one side, the neck also inclines, when the inclination degree of the neck is large, the metal conductive thimble close to the tail is in contact with the conductive ring far away from the anti-explosion nozzle, and under the conflict limitation, the neck does not continue to incline, so that the other metal conductive thimble cannot be in contact with the other conductive ring. Therefore, under the condition that the air bag is driven by wind power to shake, the electromagnet cannot be conducted, the air bag cannot be punctured by the contact pin, only when the tail of the air bag is impacted by air pressure generated by explosion and extruded, the neck between the two rubber rings is bulged, the electromagnet can be conducted, and therefore the triggering structure for electrifying the electromagnet can avoid the condition that the air bag is driven by wind power to shake and false triggering caused by shaking of the air bag can be avoided.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic structural view of the injection mechanism;
FIG. 3 is a cross-sectional view of the explosion-proof spray assembly;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is a schematic diagram of the energization of the electromagnet;
fig. 6 is a flow diagram of a valve control strategy.
Reference numerals: 1. a controller; 2. a flame sensor; 3. aligning the positioning mechanism; 4. an injection mechanism; 5. a high pressure gas source pipeline; 6. a fire suppression spray assembly; 61. a fire extinguishing proportional solenoid valve; 62. a fire extinguishing nozzle; 63. a fire extinguishing powder pipe; 7. an explosion-proof jetting assembly; 71. an explosion-proof proportional solenoid valve; 72. an explosion-proof spray head; 721. a pressure sensor; 722. a tapered outer wall; 73. an explosion-proof powder tube; 731. a pressure relief valve; 74. an explosion-proof sleeve; 741. inserting a pin; 7411. a slider; 7412. a needle tip; 742. an elastic member; 743. an electromagnet; 744. conducting rings; 745. a power supply device; 746. a tapered inner wall; 747. an elastic rubber layer; 748. a sliding groove; 749. a baffle plate; 75. an air bag; 751. a neck portion; 752. a tail portion; 753. a rubber ring; 754. a conductive strip; 755. a metal conductive thimble.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1, the explosion-proof type automatic tracking positioning jet fire extinguishing apparatus of the embodiment includes a controller 1, a flame sensor 2, an alignment positioning mechanism 3 and a spraying mechanism 4, the alignment positioning mechanism 3 may be fixed on a wall body or on a high-pressure gas source pipeline 5 or on other external devices, the controller 1 may be fixed on the alignment positioning mechanism 3 or on the spraying mechanism 4 or on the wall body or on the high-pressure gas source pipeline 5 or on other external devices, the flame sensor 2 is fixed on the spraying mechanism 4, the spraying mechanism 4 is fixed on the alignment positioning mechanism 3 and moves along with the alignment positioning mechanism 3, the alignment positioning mechanism 3 includes a horizontal rotating component and a vertical rotating component, the horizontal rotating component is used for driving the spraying mechanism 4 to rotate on a horizontal plane, the vertical rotating component is used for driving the spraying mechanism 4 to rotate on a vertical plane, the two are matched to drive the injection mechanism 4 to rotate to a specified angle according to the instruction of the controller 1. The injection mechanism 4 is externally connected with a high-pressure gas source pipeline 5, and the gas in the high-pressure gas source pipeline 5 is nitrogen or flame-retardant gas such as carbon dioxide. The flame sensor 2 is used for sensing flame and sending a flame position signal to the controller 1, and the flame sensor 2 can adopt a Weisheng technology RD-913FB series pyroelectric flame sensor 2. The controller 1 is used for controlling the alignment positioning mechanism 3 to move so as to drive the injection mechanism 4 to align the flame, and controlling the injection mechanism 4 to inject the flame-retardant gas to extinguish the fire.
Referring to fig. 2, the injection mechanism 4 comprises a fire extinguishing injection assembly 6 and an explosion-proof injection assembly 7, the fire extinguishing injection assembly 6 comprises a fire extinguishing proportion solenoid valve 61, a fire extinguishing nozzle 62 and a fire extinguishing powder pipe 63, the fire extinguishing nozzle 62, the fire extinguishing powder pipe 63 and the fire extinguishing proportion solenoid valve 61 are sequentially connected, the fire extinguishing proportion solenoid valve 61 is connected with the high-pressure air source pipeline 5, fire extinguishing powder is filled in the fire extinguishing powder pipe 63, and the fire extinguishing powder is ABC dry powder fire extinguishing agent. When controller 1 control proportion solenoid valve 61 that puts out a fire was opened, high-pressure flame retardant gas was through the powder pipe 63 of putting out a fire and is driven the powder of putting out a fire and spout from the shower nozzle 62 that puts out a fire, and high-pressure flame retardant gas and the solid gas mixture of powder of putting out a fire put out a fire to flame simultaneously, put out a fire the back of accomplishing, and the powder of putting out a fire scatters on the ground, if the reoccurrence explodes, the powder of putting out a fire can be raised and play the effect of continuing to play the fire extinguishing, is favorable to preventing the propagation of explosion.
Referring to fig. 2, 3 and 4, the explosion-proof injection assembly 7 includes an explosion-proof proportional solenoid valve 71, an explosion-proof nozzle 72, an explosion-proof powder pipe 73, an explosion-proof sleeve 74 and an air bag 75, the explosion-proof nozzle 72, the explosion-proof powder pipe 73, the explosion-proof proportional solenoid valve 71 and the high-pressure air source pipeline 5 are connected in sequence, the explosion-proof powder pipe 73 is filled with fire extinguishing powder, and the fire extinguishing powder is ABC dry powder fire extinguishing agent.
Referring to fig. 2, 3, 4 and 5, the explosion-proof sleeve 74 is detachably connected to the explosion-proof nozzle 72. A contact pin 741 is slidably connected to the explosion-proof sleeve 74, a sliding direction of the contact pin 741 is a radial direction of the explosion-proof sleeve 74, at least a portion of the contact pin 741 is made of a magnetic material, and the magnetic material is a material capable of being attracted by the electromagnet 743, such as iron. An elastic member 742 is disposed between the insertion pin 741 and the explosion-proof sleeve 74, and the elastic member 742 may be a spring. The elastic member 742 is used for providing elastic force to enable the contact pin 741 to slide out of the explosion-proof sleeve 74, an electromagnet 743 and two conducting rings 744 are further fixed on the inner side wall of the explosion-proof sleeve 74, and the central axes of the conducting rings 744 are collinear with the central axis of the inner wall of the explosion-proof sleeve 74. The two conducting rings 744 are arranged at intervals along the length direction of the explosion-proof sleeve 74, one conducting ring 744 is externally connected with one stage of the power supply device 745, the other conducting ring 744 is electrically connected with the electromagnet 743 and then is externally connected with the other pole of the power supply device 745, and the power supply device 745 is a storage battery or a power socket. When the two conductive rings 744 are conducted, a current loop between the electromagnet 743 and the power supply device 745 is conducted, the electromagnet 743 is electrified to generate a magnetic field, the pin 741 is subjected to magnetic force sliding into the explosion-proof sleeve 74 because the pin 741 is made of magnetic material, the magnetic force is larger than the elastic force of the elastic member 742 on the pin 741, and the pin 741 is inserted into the explosion-proof sleeve under the action of the magnetic force. When the two conductive rings 744 are disconnected, the electromagnet 743 is powered off, the magnetic force disappears, and the pin 741 is reset under the elastic force of the elastic member 742.
Referring to fig. 2, 3 and 4, the airbag 75 includes a neck portion 751 and a tail portion 752 connected to each other, and the thickness of the neck portion 751 is greater than that of the tail portion 752, so that the tail portion 752 is more easily expanded when the airbag 75 is inflated without external force applied to the airbag 75. The outer contour of the tail portion 752 is larger than the outer contour of the neck portion 751, the ratio of the length of the neck portion 751 to the length of the tail portion 752 is 1:2.5-5 in the non-inflated state of the airbag 75, and the ratio of the width of the neck portion 751 to the widest position of the tail portion 752 is 1: 3-5, the bladder 75 is made of low density polyethylene compounded rubber. Neck 751 is located within explosion proof sleeve 74 and neck 751 is connected to explosion proof spray head 72. The neck portion 751 is provided with two rubber rings 753, the two rubber rings 753 are arranged at intervals in the length direction of the neck portion 751, the rubber rings 753 are made of high-density polyethylene mixed rubber, and the expansion rate of the rubber rings 753 is lower than that of the air bag 75 to limit expansion of the neck portion 751. Since the rubber ring 753 is less likely to expand relative to the air bag 75, the expansion of the neck 751 can be restricted so that the expansion of the neck 751 has a significant critical pressure value, when the air pressure in the neck 751 is within the critical pressure value, the neck 751 in the two rubber rings 753 does not expand outward significantly, and when the air pressure in the neck 751 breaks the critical pressure value, the neck 751 in the two rubber rings 753 expands outward significantly.
Referring to fig. 2, 3, and 4, a plurality of conductive strips 754 are disposed between the two rubber rings 753, the plurality of conductive strips 754 are annularly and uniformly spaced along the circumferential direction of the neck 751, the air bags 75 are disposed in multiple layers, in this embodiment, the air bags 75 are disposed in two layers, the conductive strips 754 are clamped and fixed between the two layers, the length direction of the conductive strips 754 is the length direction of the neck 751, that is, two ends of the conductive strips 754 face the two rubber rings 753. The middle of the conductive strip 754 in the length direction is bent towards the outside of the neck portion 751, and the bent conductive strip 754 has a guiding effect on the expansion of the neck portion 751, so that when the expansion is needed due to the increase of the air pressure in the neck portion 751, the neck portion 751 between the two rubber rings 753 is more easily expanded relative to the other parts of the neck portion 751 due to the guiding effect of the conductive strip 754.
Referring to fig. 2, 3 and 4, two ends of the conductive strip 754 are respectively provided with a metal conductive thimble 755, one end of the metal conductive thimble 755 is fixed with the conductive strip 754, and the other end of the metal conductive thimble 755 passes through the air bag 75 and faces the conductive ring 744; when the air bag 75 bulges and the neck 751 between the two rubber rings 753 does not bulge outwards, namely the air pressure of the neck 751 is within a critical pressure value, and the neck 751 does not bulge outwards obviously, at the moment, a gap exists between the metal conductive thimble 755 and the conductive ring 744, even if the air bag 75 is blown by wind and inclines, so that the neck 751 inclines, the metal conductive thimbles 755 at the two ends of the conductive strip 754 only contact the conductive ring 744 by thimbles far away from the explosion-proof spray head 72, and the two metal conductive thimbles 755 of the same conductive strip 754 do not contact the two conductive rings 744 at the same time respectively. When explosion occurs, the tail portion 752 is impacted by air pressure generated by the explosion, at this time, the air pressure in the air bag 75 is transmitted to the neck portion 751, the air pressure of the neck portion 751 is increased and exceeds a critical pressure value, so that when the neck portion 751 between the two rubber rings 753 bulges outwards, the two metal conductive thimbles 755 of the conductive strip 754 move outwards along with the expanded neck portion 751 and contact the two conductive rings 744 respectively, and thus conduction between the two conductive rings 744 is realized.
Referring to fig. 2, 3, 4 and 6, the explosion-proof sprinkler 72 is further fixed with a pressure sensor 721, the pressure sensor 721 extends into the air bag 75, the pressure sensor 721 can be a pressure sensor 721 of a model US9011-100-8 of shenzhen linxing sensing technology limited, which has a small volume and occupies a small volume after being fixed on the explosion-proof sprinkler 72. The controller 1 comprises a valve control module, the valve control module is provided with a valve control strategy, and the valve control strategy comprises a fire extinguishing step, an explosion prevention step and a dilution step.
The fire extinguishing step comprises the steps that after the controller 1 controls the alignment positioning mechanism 3 to move so that the fire extinguishing spray head 62 is aligned with flames, the fire extinguishing proportional electromagnetic valve 61 is controlled to be completely opened, meanwhile, the explosion-proof proportional electromagnetic valve 71 is controlled to be opened at a small flow rate, and an explosion-proof step is carried out. The explosion-proof proportional solenoid valve 71 has two opening states, one is fully opened, the other is small-flow opening, namely the opening degree of the explosion-proof proportional solenoid valve 71 is small, at the moment, the flame-retardant gas slowly enters the air bag 75, so that the air bag 75 slowly swells, on one hand, the separation of the neck 751 and the explosion-proof spray head 72 caused by the overlarge impact of the flame-retardant gas on the air bag 75 is avoided, on the other hand, the air pressure in the air bag 75 is slowly increased, so that the pressure sensor 721 can accurately reflect the pressure in the air bag 75, meanwhile, the phenomenon that the air bag 75 swells too fast caused by the too fast filling of the flame-retardant gas into the air bag 75 is avoided, the air pressures in various parts in the air bag 75 are different and change fast, the air pressure in the neck 751 instantaneously exceeds the critical pressure value to cause the expansion of the neck 751, and the electromagnet 743 is electrified by mistake.
The explosion-proof step comprises the steps that the controller 1 monitors the air pressure in the air bag 75 through the pressure sensor 721, when the air pressure is increased to reach the preset critical air pressure upper limit value, the controller 1 controls the explosion-proof proportional electromagnetic valve 71 to be closed, the controller 1 continues to monitor the air pressure in the air bag 75 through the pressure sensor 721, as long as the air pressure in the air bag 75 is gradually reduced to reach the preset critical air pressure lower limit value, the explosion-proof proportional electromagnetic valve 71 is controlled to be opened again in a small flow rate, when the air pressure in the air bag 75 reaches the preset critical air pressure upper limit value again, the explosion-proof proportional electromagnetic valve 71 is closed, and the dilution step is carried out. The critical pressure upper limit value and the critical pressure lower limit value are both smaller than the critical pressure value. When the air pressure in the airbag 75 is between the lower limit of the critical air pressure and the upper limit of the critical air pressure, the air pressure in the neck 751 is likely to exceed the critical pressure value when the airbag 75 receives the air pressure impact generated by explosion. Because of the connection airtightness between the air bag 75 and the explosion-proof nozzle 72, the connection airtightness between the explosion-proof nozzle 72, the explosion-proof powder tube 73 and the explosion-proof proportional solenoid valve 71, the airtightness of the explosion-proof proportional solenoid valve 71, and the like, the flame-retardant gas in the air bag 75 may leak, and the air pressure in the air bag 75 may decrease along with the gas leakage, so that the flame-retardant gas is re-filled when the monitored air pressure is less than the lower limit value of the critical air pressure, thereby being capable of compensating for the leaked flame-retardant gas, and maintaining the air pressure in the air bag 75 between the lower limit value of the critical air pressure and the upper limit value of the critical air pressure.
The dilution step includes controlling the explosion-proof proportional solenoid valve 71 to be fully opened when the controller 1 monitors that the pressure inside the air bag 75 increases first and then decreases instantaneously to the pressure outside the air bag 75. When the air bag 75 receives the air pressure impact generated by explosion, the tail portion 752 is squeezed to enable the air pressure in the air bag 75 to be increased, then the neck portion 751 is expanded and bulged, the electromagnet 743 is electrified, the inserting pin 741 is inserted into the explosion-proof sleeve 74 and punctures the air bag 75, the air pressure in the air bag 75 is instantly reduced to be the same as the air pressure outside the air bag 75, therefore, when the pressure in the air bag 75 is detected to be increased firstly and then is instantly reduced, the air bag 75 is punctured, at the moment, the explosion-proof proportional electromagnetic valve 71 is opened, and the explosion-proof nozzle 72 also sprays flame retardant gas to extinguish fire and retard fire. The fire-extinguishing powder diffused in the air is pushed to a farther space by the power carried by the flame-retardant gas when the flame-retardant gas is sprayed out, and the space range of the fire-extinguishing powder is further enlarged. Meanwhile, the sprayed flame-retardant gas can dilute the concentration of combustible gas or harmful gas such as gas in the air, and the fire extinguishing nozzle 62 and the explosion-proof nozzle 72 extinguish fire simultaneously, so that the fire extinguishing efficiency is improved.
Referring to fig. 3 and 4, as a modified embodiment, the outer side wall of the end of the explosion-proof nozzle 72, which is used for being connected with the air bag 75, is provided with a conical outer wall 722, the small outer diameter end of the conical outer wall 722 faces the air bag 75, and the conical outer wall 722 is provided to facilitate the sleeving of the neck 751 on the conical outer wall 722. The explosion-proof sleeve 74 and the explosion-proof spray head 72 are detachably connected in a threaded manner, a conical inner wall 746 is arranged on the inner side wall of the explosion-proof sleeve 74, the taper of the conical inner wall 746 is consistent with that of the conical outer wall 722, and the taper is set to be between 5 degrees and 30 degrees. When the neck 751 is sleeved on the tapered outer wall 722, the contraction force of the neck 751 can make the neck 751 cling to the tapered outer wall 722. At this point, explosion-proof sleeve 74 is again threaded onto explosion-proof nozzle 72 until tapered inner wall 746 and tapered outer wall 722 grip neck 751, further strengthening the connection between neck 751 and tapered outer wall 722, and neck 751 is less likely to fall off tapered outer wall 722. The elastic rubber layers 747 are arranged on the conical inner wall 746 and the conical outer wall 722, the elastic rubber layers 747 have certain elasticity, and the elastic rubber layers 747 are in contact with the neck 751 of the air bag 75, so that the surface of the air bag 75 is not easy to be pinched when the neck 751 is clamped.
Referring to fig. 2 and 3, as a modified specific embodiment, both ends of the explosion-proof powder pipe 73 are detachably connected with the explosion-proof nozzle 72 and the explosion-proof proportional solenoid valve 71, and the detachable connection mode may be specifically a screw connection or a clamping connection. The explosion-proof powder pipe 73 is provided with a pressure relief valve 731. When the secondary explosion does not occur, the air bag 75 cannot be punctured, and people can open the air bag through controlling the pressure release valve 731 after confirming the on-site safety, so that the flame-retardant gas in the air bag 75 is discharged through the pressure release valve 731, and the fire extinguishing powder is deposited in the air bag 75. People can detach the explosion-proof sleeve 74 and then take off the air bag 75, detach the explosion-proof powder pipe 73, and people can refill the fire extinguishing powder in the air bag 75 into the explosion-proof powder pipe 73, thereby realizing the reutilization of the fire extinguishing powder.
Referring to fig. 2 and 3, as a modified specific embodiment, the sliding connection manner between the insertion pin 741 and the explosion-proof sleeve 74 is specifically: the explosion-proof casing 74 is provided with a sliding groove 748, the sliding groove 748 is communicated with the inner wall of the explosion-proof casing 74, the pin 741 comprises a sliding block 7411 and a needle point 7412, the sliding block 7411 is slidably connected in the sliding groove 748, the sliding block 7411 is made of magnetic material, for example, iron, the needle point 7412 is fixed at one end of the sliding block 7411 facing the air bag 75, the elastic element 742 is arranged between the sliding block 7411 and the inner wall of the sliding groove, and when the sliding block 7411 does not receive magnetic force, the needle point 7412 completely enters the sliding groove 748 under the elastic force of the elastic element 742. Since the needlepoint 7412 is not exposed, the air bag 75 is prevented from being punctured due to the fact that the surface of the air bag 75 touches the needlepoint 7412 by mistake.
Referring to fig. 1, as a modified embodiment, a stop sheet 749 for blocking the port is arranged at one end of the explosion-proof sleeve 74 away from the explosion-proof nozzle 72, the stop sheet 749 is inserted on the explosion-proof sleeve 74, and the air bag 75 pushes the stop sheet 749 to separate from the explosion-proof sleeve 74 under the condition of continuous swelling. The blocking piece 749 is connected with the explosion-proof sleeve 74 through friction force, and the blocking piece 749 can block external foreign matters from entering the explosion-proof sleeve 74 to damage the air bag 75 in the transportation process or the normal placement process, and simultaneously can block the air bag 75 which is not bulged from the explosion-proof sleeve 74, and the air bag 75 is easy to be damaged by the foreign matters when being moved out of the explosion-proof sleeve 74.
The working principle is as follows:
when the flame sensor 2 detects the flame generated by fire or the flame generated by explosion, the controller 1 controls the aligning and positioning mechanism 3 to move so as to drive the fire-extinguishing nozzle 62 of the fire-extinguishing spraying assembly 6 to align with the position of the flame and spray flame-retardant gas. Because the fire extinguishing powder pipe 63 is filled with fire extinguishing powder, the fire extinguishing powder is mixed and sprayed by the flame retardant gas, and fire extinguishing or flame extinguishing caused by explosion is realized together.
When the fire extinguishing spraying assembly 6 sprays to extinguish fire, the controller 1 controls the explosion-proof proportional solenoid valve 71 of the explosion-proof spraying assembly 7 to be opened at a small flow rate, at the moment, the explosion-proof gas slowly passes through the explosion-proof proportional solenoid valve 71 and pushes fire extinguishing powder in the explosion-proof powder pipe 73 into the air bag 75, the air bag 75 is slowly inflated, the air pressure in the air bag 75 is gradually increased, and the air bag 75 is gradually inflated. When the pressure sensor 721 detects that the pressure in the air bag 75 reaches the upper limit value of the critical air pressure, the explosion-proof proportional solenoid valve 71 is closed. After the explosion-proof proportional solenoid valve 71 is closed, if the pressure sensor 721 detects that the pressure in the air bag 75 is slowly reduced and reaches the lower limit of the critical air pressure, the controller 1 controls the explosion-proof proportional solenoid valve 71 to be opened again at a small flow rate until the pressure in the air bag 75 is increased again to the upper limit of the critical air pressure, and then closes the explosion-proof proportional solenoid valve 71. Thereby compensating for the loss of the flame-retardant gas due to leakage in the airbag 75 and maintaining the pressure in the airbag 75 between the lower limit value of the critical pressure and the upper limit value of the critical pressure. When the air pressure in the air bag 75 is within this range, the neck 751 between the two rubber rings 753 may bulge if the tail 752 of the air bag 75 is pressed by the impact of the air pressure generated by the explosion.
When a second explosion occurs after one explosion or an explosion occurs after fire, the air pressure generated by the explosion impacts and presses the tail portion 752 of the air bag 75, the tail portion 752 of the air bag 75 is compressed, the air pressure in the air bag 75 rises, the neck portion 751 between the two rubber rings 753 is obviously expanded and bulges, the conductive strip 754 moves towards the inner wall direction of the explosion-proof sleeve 74 along with the expansion of the neck portion 751, the metal conductive thimble 755 on the conductive strip 754 is continuously close to the conductive strip 754 on the inner wall of the explosion-proof sleeve 74, when the metal conductive pins 755 on the conductive strip 754 are in contact with the two conductive rings 744, the electromagnet 743 is electrified to adsorb the contact pin 741 to slide in the explosion-proof sleeve 74, the needle point 7412 of the contact pin 741 extends into the explosion-proof sleeve 74 under the action of magnetic force and punctures the inflated air bag 75, and the fire extinguishing powder and the flame retardant gas in the air bag 75 instantly fill a large-range space, so that the flame generated by explosion is extinguished rapidly and the spread of the explosion is prevented. Then, the metal conductive thimble 755 does not contact with the conductive ring 744, and the pin 741 slides back into the sliding groove 748 on the explosion-proof casing 74 under the elastic force of the elastic member 742. And after the air bag 75 is punctured, the pressure sensor 721 monitors that the pressure in the air bag 75 is increased firstly and then reduced instantly, the explosion-proof proportional electromagnetic valve 71 is controlled to be completely opened, at the moment, the explosion-proof spray head 72 also sprays flame-retardant gas, and the power carried by the flame-retardant gas during spraying pushes the fire-extinguishing powder diffused in the air to a farther space, so that the space range of the fire-extinguishing powder is further enlarged. Meanwhile, the sprayed flame-retardant gas can dilute the concentration of combustible gas or harmful gas such as gas in the air, and the fire extinguishing nozzle 62 and the explosion-proof nozzle 72 extinguish fire simultaneously, so that the fire extinguishing efficiency is improved. After the explosion, the fire extinguishing powder is deposited on the ground, and if the explosion occurs again, the fire extinguishing powder on the ground is lifted, so that the effects of extinguishing the fire and preventing the explosion from spreading are achieved again.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides an explosion-proof type automatic tracking location efflux extinguishing device, includes controller (1), flame sensor (2), aims at positioning mechanism (3) and injection mechanism (4), injection mechanism (4) are fixed in aim at positioning mechanism (3) and follow aim at positioning mechanism (3) motion, injection mechanism (4) external high-pressure gas source pipeline (5), gas in high-pressure gas source pipeline (5) is flame retardant gas, flame sensor (2) be used for responding to flame and to controller (1) send flame position signal, controller (1) are used for control aim at positioning mechanism (3) motion and control injection mechanism (4) spray put out a fire, its characterized in that: the spraying mechanism (4) comprises a fire extinguishing spraying assembly (6) and an explosion-proof spraying assembly (7), the fire extinguishing spraying assembly (6) comprises a fire extinguishing proportional solenoid valve (61) and a fire extinguishing spray head (62), and the fire extinguishing proportional solenoid valve (61) is connected with the high-pressure air source pipeline (5) and the fire extinguishing spray head (62);
the explosion-proof injection assembly (7) comprises an explosion-proof proportional electromagnetic valve (71), an explosion-proof spray head (72), an explosion-proof powder pipe (73), an explosion-proof sleeve (74) and an air bag (75), wherein the explosion-proof spray head (72), the explosion-proof powder pipe (73), the explosion-proof proportional electromagnetic valve (71) and the high-pressure air source pipeline (5) are sequentially connected, fire extinguishing powder is filled in the explosion-proof powder pipe (73), the explosion-proof sleeve (74) is detachably connected to the explosion-proof spray head (72), a contact pin (741) is slidably connected to the explosion-proof sleeve (74), the sliding direction of the contact pin (741) is the radial direction of the explosion-proof sleeve (74), at least one part of the contact pin (741) is made of a magnetic material, an elastic piece (742) is arranged between the contact pin (741) and the explosion-proof sleeve (74), and the elastic piece (742) is used for providing elasticity so that the contact pin (741) slides out of the explosion-proof sleeve (74), an electromagnet (743) and two conducting rings (744) are further fixed on the inner side wall of the explosion-proof sleeve (74), the two conducting rings (744) are arranged at intervals along the length direction of the explosion-proof sleeve (74), one conducting ring (744) is externally connected with one stage of a power supply device (745), the other conducting ring (744) is electrically connected with the electromagnet (743) and then is externally connected with the other pole of the power supply device (745), and the contact pin (741) is driven to be inserted into the explosion-proof sleeve through magnetic force in the power-on state of the electromagnet (743);
the air bag (75) comprises a neck portion (751) and a tail portion (752) which are connected with each other, the wall thickness of the neck portion (751) is larger than that of the tail portion (752), the neck portion (751) is located in an explosion-proof sleeve (74), the neck portion (751) is connected with the explosion-proof spray head (72), two rubber rings (753) are arranged on the neck portion (751), the rubber rings (753) are used for limiting expansion of the neck portion (751), the two rubber rings (753) are arranged at intervals along the length direction of the neck portion (751), a plurality of conducting strips (754) are arranged between the two rubber rings (753), the conducting strips (754) are arranged at intervals along the ring shape of the neck portion (751), the air bag (75) is arranged in a multi-layer mode, the conducting strips (754) are located between any two layers, and the length direction of the conducting strips (754) is the length direction of the neck portion (751), two ends of the conductive strip (754) are respectively provided with a metal conductive thimble (755), one end of the metal conductive thimble (755) is fixed with the conductive strip (754), and the other end of the metal conductive thimble passes through the air bag (75) and faces the conductive ring (744); when the air bag (75) is bulged and the neck part (751) between the two rubber rings (753) is not bulged outwards, the two metal conductive thimbles (755) of the conductive strips (754) are not simultaneously contacted with the two conductive rings (744) respectively; when the tail part (752) is impacted by air pressure generated by explosion to cause the neck part (751) between the two rubber rings (753) to bulge outwards, the two metal conductive thimbles (755) of the conductive strips (754) move outwards and respectively contact the two conductive rings (744);
the anti-explosion nozzle (72) is further fixed with a pressure sensor (721), the pressure sensor (721) extends into the air bag (75), the controller (1) comprises a valve control module, the valve control module is provided with a valve control strategy, the valve control strategy comprises a fire extinguishing step, an anti-explosion step and a diluting step, the fire extinguishing step comprises the steps that after the controller (1) controls the aligning and positioning mechanism (3) to move so that the fire extinguishing nozzle (62) aligns to flames, the fire extinguishing proportion electromagnetic valve (61) is controlled to be completely opened, meanwhile, the anti-explosion proportion electromagnetic valve (71) is controlled to be opened at a small flow rate, and the step of the anti-explosion is carried out; the explosion-proof step comprises the steps that the controller (1) monitors the air pressure in the air bag (75) through the pressure sensor (721), and when the air pressure is increased to reach a preset critical air pressure upper limit value, the controller (1) controls the explosion-proof proportional electromagnetic valve (71) to be closed and enters the dilution step; the dilution step comprises the step that when the controller (1) monitors that the pressure in the air bag (75) is increased firstly and then is instantly reduced to the pressure outside the air bag (75), the explosion-proof proportional electromagnetic valve (71) is controlled to be completely opened.
2. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: the explosion-proof step also comprises that after the explosion-proof proportional electromagnetic valve (71) is closed, the controller (1) monitors that the air pressure in the air bag (75) is gradually reduced to reach the lower limit value of the preset critical air pressure through the pressure sensor (721), the explosion-proof proportional electromagnetic valve (71) is controlled to be opened at a low flow rate again, and the explosion-proof proportional electromagnetic valve (71) is closed after the air pressure in the air bag (75) reaches the upper limit value of the preset critical air pressure again.
3. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: the outer side wall of one end, connected with the air bag (75), of the explosion-proof spray head (72) is provided with a conical outer wall (722), the small end of the outer diameter of the conical outer wall (722) faces the air bag (75), and the conical outer wall (722) is sleeved with the neck (751).
4. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 3, characterized in that: the explosion-proof sleeve (74) is in threaded connection with the explosion-proof spray head (72), a conical inner wall (746) is arranged on the inner side wall of the explosion-proof sleeve (74), the conical degree of the conical inner wall (746) is consistent with that of the conical outer wall (722), and when the explosion-proof sleeve (74) is screwed onto the explosion-proof spray head (72), the conical inner wall (746) and the conical outer wall (722) clamp the neck (751).
5. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 4, characterized in that: elastic rubber layers (747) are arranged on the conical inner wall (746) and the conical outer wall (722).
6. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: the conductive strip (754) is bent at the middle in the length direction thereof to the outside of the neck portion (751).
7. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: the two ends of the explosion-proof powder pipe (73) are detachably connected with the explosion-proof spray head (72) and the explosion-proof proportional electromagnetic valve (71), and a pressure release valve (731) is arranged on the explosion-proof powder pipe (73).
8. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: be provided with sliding tray (748) on explosion-proof sleeve pipe (74), sliding tray (748) with the inner wall of explosion-proof sleeve pipe (74) switches on, contact pin (741) are including sliding block (7411) and needle point (7412), sliding block (7411) sliding connection in sliding tray (748), sliding block (7411) are made by magnetic material, needle point (7412) are fixed in sliding block (7411) face the one end of gasbag (75), elastic component (742) set up in sliding block (7411) with between the inner wall of sliding tray (748), needle point (7412) in under the spring action of elastic component (742) enter into completely in sliding tray (748).
9. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: one end, far away from the explosion-proof nozzle (72), of the explosion-proof sleeve (74) is provided with a blocking sheet (749) used for blocking a port, the blocking sheet (749) is inserted into the explosion-proof sleeve (74), and the air bag (75) pushes the blocking sheet (749) to be separated from the explosion-proof sleeve (74) under the state of continuously bulging.
10. An explosion-proof automatic tracking and positioning jet flow fire extinguishing device according to claim 1, characterized in that: the fire extinguishing spraying assembly (6) further comprises a fire extinguishing powder pipe (63), the fire extinguishing powder pipe (63) is located between the fire extinguishing proportion electromagnetic valve (61) and the fire extinguishing spray head (62), and fire extinguishing powder is filled in the fire extinguishing powder pipe (63).
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| CN202110815262.3A CN113521626B (en) | 2021-07-19 | 2021-07-19 | Explosion-proof type automatic tracking location efflux extinguishing device |
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| CN202110815262.3A CN113521626B (en) | 2021-07-19 | 2021-07-19 | Explosion-proof type automatic tracking location efflux extinguishing device |
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