CN218485048U - Injection type supersonic velocity dry powder fire extinguishing device - Google Patents
Injection type supersonic velocity dry powder fire extinguishing device Download PDFInfo
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- CN218485048U CN218485048U CN202121324895.6U CN202121324895U CN218485048U CN 218485048 U CN218485048 U CN 218485048U CN 202121324895 U CN202121324895 U CN 202121324895U CN 218485048 U CN218485048 U CN 218485048U
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Abstract
The utility model discloses an injection type supersonic velocity dry powder extinguishing device. A driving gas tank and a low-pressure tank are arranged on the cart, a gas injection port is formed in the driving gas tank, the driving gas tank and the low-pressure tank are connected through a metal pipe, and a pressure reducing valve is mounted on the metal pipe; a powder storage device is fixed in the low-pressure tank, one end of a powder conveying metal hose is connected to the bottom of the powder storage device, and the other end of the powder conveying metal hose extends downwards, is divided into two branches, is led out of the low-pressure tank body and is connected to an injection type spray pipe; an injection type spray pipe for realizing supersonic powder spraying is arranged outside the low-pressure tank body, and the inlet end of the injection type spray pipe is connected with the sealing connector; under the action of airflow, the gas-solid two-phase flow in the injection type spray pipe crosses from subsonic speed to supersonic speed to realize jet flow. The utility model discloses finally will enlarge extinguishing device's high-speed efficiency of putting out a fire, the setting up that the injection type was dusted makes the dry powder agent obtain make full use of, has effectively improved the fire extinguishing ability economically to noise reduction effect has been reached.
Description
Technical Field
The utility model relates to a fire-fighting equipment, concretely relates to injection type supersonic velocity dry powder extinguishing device.
Background
Dry powder extinguishers are important fire fighting tools, and fire extinguishing devices are equipped in many places. The absolute proportion of electric appliance faults and careless fire in the fire disaster causes, and the disaster prevention and reduction task faced by people is still serious. The professional, convenient and efficient fire extinguishing device design technology has great significance for rapidly controlling fire, avoiding casualties as much as possible and effectively reducing loss. The key technology for designing the core components of the dry powder extinguishing device can be provided only by fully knowing the gas-solid two-phase flow behaviors inside and outside the dry powder extinguishing agent conveying channel and mastering the influence rule of the geometry, physical property and operation parameters by a system.
The general defects of the fire extinguishing device used at present are that the structure is complex, the manufacturing cost is high, the use is inconvenient, the fire extinguishing performance is not enough, and the ejection type supersonic dry powder fire extinguishing device needs to be developed for better promoting the fire extinguishing efficiency and reducing the cost of the fire extinguishing agent.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the utility model discloses an injection type supersonic velocity dry powder fire extinguishing device.
The technical scheme of the utility model as follows:
the powder conveying device comprises a cart, a sealing connector, a driving gas tank, a low-pressure tank, a powder storage device, a powder conveying metal hose and an injection type spray pipe, wherein the driving gas tank and the low-pressure tank are placed on the cart, a gas injection port is formed in the driving gas tank, the driving gas tank and the low-pressure tank are connected through a metal pipe, and a pressure reducing valve is installed on the metal pipe;
a powder storage device is fixed in the low-pressure tank, one end of a powder conveying metal hose is connected to the bottom of the powder storage device, the other end of the powder conveying metal hose extends downwards and is divided into two branches to be led out of the low-pressure tank body, and a sealing connector used for sealing the tank body is arranged at the joint of the two branches of the powder conveying metal hose and the low-pressure tank;
the injection type spray pipe for realizing supersonic powder spraying is arranged outside the low-pressure tank body, the injection type spray pipe comprises a straight pipe section, a contraction section and an expansion section which are sequentially connected from an inlet end to an outlet end, the inlet end of the injection type spray pipe is communicated with the interior of the low-pressure tank body through being connected to a sealing connector, two powder conveying metal hoses are respectively connected to the expansion section of the injection type spray pipe after being led out from the low-pressure tank body, and the connection position is close to the contraction section.
The inner diameter of the straight pipe section of the injection type spray pipe is unchanged; in the direction from the inlet end to the outlet end, the inner diameter of the contraction section is reduced from large to small, and the inner diameter of the expansion section is reduced from large to small; the radius of the inlet end of the injection type spray pipe is 10.2 mm-12.7 mm, and the preferred radius is 11.5mm; the radius of the outlet end is 14.8 mm-17.3 mm, preferably 16.1mm; the radius of the joint of the expansion section and the contraction section is 6.85 mm-9.25 mm, and 8.05mm is preferred.
The axial length of the straight line section is 44.8 mm-47.2 mm, and the preferred length is 46mm; the axial length of the contraction section is 67.8 mm-70.2 mm, preferably 69mm; the axial length of the expansion section is 136.8 mm-139.2 mm, preferably 138mm.
The contraction angle alpha of the contraction section is between 3.16 degrees and 5.54 degrees, and preferably 5.3 degrees; the expansion angle beta of the expansion section is between 1.2 and 3.5 degrees, and preferably 3.34 degrees; the powder conveying angle theta =45 degrees at the joint of the two powder conveying metal hoses and the low-pressure tank, and preferably ranges from 30 degrees to 50 degrees.
A spherical control dry powder flow valve is arranged on the main path of the powder conveying metal hose;
the spherical dry powder control flow valve is used for controlling the flow of the dry powder and preventing the dry powder from being continuously output due to gravity;
the outlet end of the injection type spray pipe is provided with a spherical control gas flow valve so as to control the intermittent operation of gas flow and interrupt the spraying at any time.
The pressure reducing valve is provided with two pressure instruments for respectively measuring pressure values in the low-pressure tank and the driving gas tank, so that pressure change can be conveniently known in real time.
The pressure relief valve is used to control the gas flow to reduce the pressure of the gas flow into the low pressure tank.
The pressure value of the low-pressure tank is controlled to be between 1.4MPa and 2.5MPa, and the pressure value of the driving gas tank is controlled to be between 12.4MPa and 13.7 MPa.
The driving gas tank is made of high-pressure-resistant materials.
Because the tank body has certain weight, the driving gas tank and the low-pressure tank are fixed on the cart through the fixed protection ring, and the tank body is convenient to move to a fire extinguishing place.
And a noise reduction device for reducing noise is arranged on the expansion section of the injection type spray pipe.
The gas injection port is used for supplementing gas.
According to the regulation of GB 8109-2005-cart fire extinguisher, the length of the ejector nozzle is 5 meters, and the ejector nozzle should be safely fixed in a storage box or a clamping device so as to be quickly and simply unfolded for use at dangerous moments.
The utility model has the advantages that:
1) The injection type spray pipe of the utility model can generate supersonic air flow, thereby expanding the high-speed fire extinguishing efficiency of the fire extinguishing device, fully utilizing dry powder agent due to the injection type powder spraying, and effectively and economically improving the fire extinguishing capability;
2) The utility model can freely adjust the injection direction of the injection type spray pipe; no flying objects are generated during working, and the noise reduction effect is achieved.
Drawings
Fig. 1 is a schematic overall appearance diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic diagram of an injection supersonic velocity spray pipe.
Fig. 4 is a graph comparing the particle velocity of the dry powder along the axis of the nozzle in the device of the present invention and the prior art fire extinguishing device.
In the figure: the device comprises a cart 1, a pressure instrument 2, a gas injection port 3, a metal connecting pipe 4, a tank body fixed protection ring 5, a pressure reducing valve 6, a driving gas tank 7, a low pressure tank 8, a powder storage device 9, a spherical control dry powder flow rate 10, a sealed connector 11, a powder conveying metal hose 12, an injection type spray pipe 13, a noise reduction device 14 and a spherical control gas flow valve 15.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 and 2, the utility model discloses a shallow 1, sealing connector 11, drive gas jar 7, low pressure jar 8, store up whitewashed device 9, defeated powder metal collapsible tube 12 and injection type spray tube 13 are fixed with two jar bodies on the shallow, and drive gas jar 7 and low pressure jar 8 set up gas injection mouth 3 on the drive gas jar for the make-up gas. The driving gas tank 7 is connected with the low-pressure tank 8 through a metal pipe 4, and a pressure reducing valve 6 is arranged on the metal pipe 4; the pressure reducing valve 6 is provided with 2 pressure instruments 2 for measuring pressure values in the low-pressure tank and the driving gas tank respectively.
A powder storage device 9 is installed in the low-pressure tank 8, the powder storage device 9 is connected with a powder conveying metal hose 12, a spherical control dry powder flow valve 10 is arranged on the main path of the powder conveying metal hose 12, the powder conveying metal hose 12 is led out of the tank body and then connected to the expansion section of the injection type spray pipe 13, and a sealing connector 11 for sealing the tank body is arranged at the connection position of the powder conveying metal hose 12 and the injection type spray pipe 13; the lower part of the right side of the low-pressure tank is connected with an injection type spray pipe, the length of the metal hose is 5 meters according to the regulation of GB 8109-2005-cart type fire extinguisher, the tail end of the injection type spray pipe is provided with an adjustable injection control valve so as to be convenient for intermittent operation and interruption of injection at any time, and a noise reduction device is arranged at the outlet end of the injection type spray pipe so as to achieve the effect of noise reduction.
As shown in fig. 3, which is an enlarged structure diagram of the portion enclosed in fig. 2, the ejector nozzle 13 includes a straight pipe section AB, a contraction section BC, and an expansion section CD sequentially connected from the inlet end to the outlet end; the inner diameter of the straight pipe section of the injection type spray pipe 13 is unchanged; in the direction from the inlet end to the outlet end, the inner diameter of the contraction section is reduced from large to small, and the inner diameter of the expansion section is reduced from large to small; the radius of the inlet end of the injection type spray pipe 13 is 10.2 mm-12.7 mm; the radius of the outlet end is 14.8 mm-17.3 mm; the radius of the joint of the expansion section and the contraction section is 6.85 mm-9.25 mm. The axial length of the straight line segment is 44.8 mm-47.2 mm, preferably 46mm; the axial length of the contraction section is 67.8 mm-70.2 mm, preferably 69mm; the axial length of the expanding section is 136.8 mm-139.2 mm, and preferably 138mm. The contraction angle alpha of the contraction section is between 3.16 degrees and 5.54 degrees, and is preferably 5.3 degrees; the expansion angle beta of the expansion section is between 1.2 and 3.5 degrees, and preferably 3.34 degrees; the inclined angle theta =45 degrees, preferably 30-50 degrees, of the output ends of the two powder conveying metal hoses 12 compared with the horizontal line.
The driving gas tank is used for providing a gas source and is made of high-pressure resistant materials; the pressure reducing valve 6 is used for reducing pressure; the gas injection port is used for supplementing gas; the dry powder extinguishing agent is a superfine particle size and super-excellent performance dry powder extinguishing agent with the proportion controlled according to requirements; the spherical control dry powder flow valve 10 is used for controlling the flow of the dry powder and preventing the dry powder from being continuously output due to gravity; the powder conveying metal hose 12 is a metal hose and is used for reducing friction; in order to reduce noise, a noise reduction device 14 is arranged at the expansion section of the injection type supersonic velocity spray pipe; because the tank body has certain weight, the tank body is fixed on the cart 1 through the fixed protection ring 5, and is convenient to move to a fire extinguishing place.
The utility model discloses the concrete working process of implementation:
s1: opening a low-pressure tank, filling a dry powder extinguishing agent into a powder storage device in the low-pressure tank, and then closing the low-pressure tank;
s2: filling gas into the driving gas tank through the gas injection port, opening the pressure reducing valve after the pressure in the driving gas tank rises to a stable value, and enabling the gas flow in the driving gas tank to enter the low-pressure tank through the metal connecting pipe so as to enable the pressure in the low-pressure tank to reach the stable value;
s3: opening the spherical control dry powder flow valve and the spherical control gas flow valve, enabling a dry powder extinguishing agent in the powder storage device to enter the injection type spray pipe through the powder conveying metal hose under the pressure action of airflow in the low-pressure tank, enabling part of the airflow to enter from the inlet end of the injection type spray pipe, and enabling the airflow speed at the inlet end to be subsonic;
s4: in the expansion section of the injection type spray pipe, the dry powder extinguishing agent and the airflow entering the injection type spray pipe are intersected to form a gas-solid two-phase flow, the gas-solid two-phase flow flows through the expansion section and then is sprayed out from the outlet end, and the gas-solid two-phase flow crosses from subsonic speed to supersonic speed at the speed of the expansion section to realize jet flow.
As shown in fig. 4, obtain according to Fluent 19.0 software simulation the utility model discloses the particle velocity contrast chart of dry powder along spray tube axis direction among device (injection type send powder) and the current extinguishing device (axial send powder), can see that the particle velocity that the injection type sent the powder is bigger than the particle velocity that the axial sent the powder, and compares the axial and send the powder the utility model discloses an injection type send the powder can spray farther distance under the high-speed prerequisite of keeping to the effect is better.
The utility model discloses a granule speed can reach 415m/s the highest.
The utility model discloses the calculation mode of the particle speed of dry powder extinguishing agent along spray tube axis direction among the device is as follows:
1) Calculating the initial particle velocity v when the dry powder extinguishing agent enters the injection type spray pipe 13, wherein the specific calculation formula is as follows:
wherein A is e Is the area of the outlet end of the spray pipe; a. The * The area of the throat part of the spray pipe is the joint of the contraction section and the expansion section; p is a radical of 0 The pressure value at the inlet end of the spray pipe is the pressure value in the low-pressure tank; p is a radical of e Is the pressure value of the environment; m is the Mach number of the outlet of the spray pipe, a is the sound velocity and is 340M/s; γ =1.4;
2) Inputting the structural parameters of the injection type spray pipe and the initial velocity v obtained by calculation into Fluent 19.0 software to simulate the movement of gas-solid two-phase flow in the injection type spray pipe 13, thereby obtaining the particle velocity of the dry powder extinguishing agent sprayed from the outlet end of the injection type spray pipe 13. The structural parameters of the injection spray pipe comprise the length, the inner diameter and the expansion angle of the injection spray pipe.
Claims (8)
1. The utility model provides an injection type supersonic velocity dry powder extinguishing device which characterized in that: the powder conveying device comprises a cart (1), a sealing connector (11), a driving gas tank (7), a low-pressure tank (8), a powder storage device (9), a powder conveying metal hose (12) and an injection type spray pipe (13), wherein the driving gas tank (7) and the low-pressure tank (8) are placed on the cart (1), a gas injection port (3) is formed in the driving gas tank (7), the driving gas tank (7) and the low-pressure tank (8) are connected through a metal pipe (4), and a pressure reducing valve (6) is installed on the metal pipe (4);
a powder storage device (9) is fixed in the low-pressure tank (8), one end of a powder conveying metal hose (12) is connected to the bottom of the powder storage device (9), the other end of the powder conveying metal hose extends downwards and is divided into two branches to be led out of the tank body of the low-pressure tank (8), and a sealing connector (11) for sealing the tank body is arranged at the joint of the two branches of the powder conveying metal hose (12) and the low-pressure tank (8);
an injection type spray pipe (13) for realizing supersonic powder spraying is arranged outside the low-pressure tank (8), the injection type spray pipe (13) comprises a straight pipe section, a contraction section and an expansion section which are sequentially connected from an inlet end to an outlet end, the inlet end of the injection type spray pipe (13) is communicated with the interior of the low-pressure tank (8) through being connected to a sealing connector (11), two powder conveying metal hoses (12) are respectively connected to the expansion section of the injection type spray pipe (13) after being led out from the low-pressure tank (8), and the connection part is close to the contraction section.
2. The ejection type supersonic velocity dry powder fire extinguishing device according to claim 1, characterized in that: the inner diameter of the straight pipe section of the injection type spray pipe (13) is unchanged; in the direction from the inlet end to the outlet end, the inner diameter of the contraction section is reduced from large to small, and the inner diameter of the expansion section is reduced from large to small;
the radius of the inlet end of the injection type spray pipe (13) is 10.2 mm-12.7 mm; the radius of the outlet end is 14.8 mm-17.3 mm; the radius of the joint of the expansion section and the contraction section is 6.85 mm-9.25 mm.
3. The injection type supersonic velocity dry powder fire extinguishing apparatus according to claim 2, characterized in that: the axial length of the straight pipe section is 44.8 mm-47.2 mm; the axial length of the contraction section is 67.8 mm-70.2 mm; the axial length of the expansion section is 136.8 mm-139.2 mm.
4. The ejection type supersonic velocity dry powder fire extinguishing device according to claim 1, characterized in that: the contraction angle alpha of the contraction section is between 3.16 and 5.54 degrees; the expansion angle beta of the expansion section is between 1.2 and 3.5 degrees; the powder conveying angle theta at the joint of the two powder conveying metal hoses (12) and the low-pressure tank (8) is 30-50 degrees.
5. The ejection type supersonic velocity dry powder fire extinguishing device according to claim 1, characterized in that:
a spherical control dry powder flow valve (10) is arranged on the main path of the powder conveying metal hose (12);
and a spherical control gas flow valve (15) is installed at the outlet end of the injection type spray pipe (13).
6. The ejection type supersonic velocity dry powder fire extinguishing device according to claim 1, characterized in that: the pressure reducing valve (6) is provided with two pressure instruments (2) for respectively measuring pressure values in the low-pressure tank (8) and the driving gas tank (7).
7. The injection type supersonic velocity dry powder fire extinguishing apparatus according to claim 1, characterized in that: the pressure reducing valve (6) is used to control the gas flow to reduce the pressure of the gas flow entering the low pressure tank (8).
8. The ejection type supersonic velocity dry powder fire extinguishing device according to claim 1, characterized in that: the pressure value of the low-pressure tank (8) is controlled to be between 1.4MPa and 2.5MPa, and the pressure value of the driving gas tank (7) is controlled to be between 12.4MPa and 13.7 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121324895.6U CN218485048U (en) | 2021-06-15 | 2021-06-15 | Injection type supersonic velocity dry powder fire extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121324895.6U CN218485048U (en) | 2021-06-15 | 2021-06-15 | Injection type supersonic velocity dry powder fire extinguishing device |
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| Publication Number | Publication Date |
|---|---|
| CN218485048U true CN218485048U (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121324895.6U Active CN218485048U (en) | 2021-06-15 | 2021-06-15 | Injection type supersonic velocity dry powder fire extinguishing device |
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| CN (1) | CN218485048U (en) |
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- 2021-06-15 CN CN202121324895.6U patent/CN218485048U/en active Active
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