CN109030559B - Cavity-separated gas explosion experimental device - Google Patents
Cavity-separated gas explosion experimental device Download PDFInfo
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- CN109030559B CN109030559B CN201810711021.2A CN201810711021A CN109030559B CN 109030559 B CN109030559 B CN 109030559B CN 201810711021 A CN201810711021 A CN 201810711021A CN 109030559 B CN109030559 B CN 109030559B
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- 238000004880 explosion Methods 0.000 title claims abstract description 123
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 3
- 238000013022 venting Methods 0.000 description 22
- 238000002474 experimental method Methods 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000012945 sealing adhesive Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a cavity-separated gas explosion experimental device which comprises a metal explosion tank, an annular partition frame, an explosion-proof film, explosion-proof fans and at least 6 spiral sealing covers, wherein the metal explosion tank comprises a combustible gas explosion cavity shell, an air adjacent cavity shell and a top cover, the top of the combustible gas explosion cavity shell is fixedly connected with the top cover, the bottom of the combustible gas explosion cavity shell is fixedly connected with the air adjacent cavity shell, the explosion-proof film is fixed on the annular partition frame, a circle of annular protrusions are arranged on the inner wall of the air adjacent cavity shell, the annular partition frame is arranged on the annular protrusions, at least two explosion-proof fans are symmetrically arranged in the combustible gas explosion cavity shell, at least 6 mounting holes are uniformly distributed on the combustible gas explosion cavity shell in an annular shape, and each mounting hole is fixedly connected with one spiral sealing cover. The invention can reproduce the pressure change condition of gas explosion under the airtight and limited release conditions, has good safety, is flexible and efficient, and can be used for the load research of gas explosion and the detection of explosion release components.
Description
Technical Field
The invention belongs to the technical field of safety engineering protection experiments, and particularly relates to a split-cavity type gas explosion experiment device.
Background
With the wide application of gas energy in the life of people, the gas explosion accident in the limited space has brought great harm to the production life of people. Currently, the most commonly used method for gas explosion accidents in protection designs is explosion venting, i.e. the gas venting in the explosion space is introduced into the adjacent room space or the external environment by the breakdown of the explosion venting member. Therefore, the method has important significance for reappearance and study of the gas explosion load under the airtight or release condition and protection of the gas explosion disaster. Based on the above, there is a strong need for a safe and efficient gas explosion experimental device capable of simulating various working conditions.
Most of the existing gas explosion experimental devices are spherical or cylindrical containers, only a single working condition of closed explosion or discharge explosion can be simulated, and the discharge is usually to discharge gas into an external space, so that the situation of limited discharge is less involved. Researchers have mainly studied the pressure change caused by gas explosion under different conditions by conducting experiments in the experimental containers, and lack an explosion venting member detection device convenient for industrial use.
It follows that the existing technical problems are: the current experimental device can only simulate the gas explosion phenomenon under a single working condition, and lacks safety and convenience. Meanwhile, an experimental device capable of conveniently detecting explosion venting components is lacking in industrial production.
Disclosure of Invention
The invention aims to provide a split-cavity type gas explosion experimental device which is used for simulating gas explosion phenomena under various working conditions, and provides a explosion venting member detection platform which is convenient for industrial application and provides theoretical reference and technical support for engineering protection.
The technical solution for realizing the purpose of the invention is as follows: the utility model provides a divide chamber formula gas explosion experimental apparatus, includes metal explosion jar, annular bulkhead, lets out and explodes film, explosion-proof fan and 6 at least spiral closing cap, metal explosion jar includes combustible gas explosion chamber shell, adjacent chamber shell of air and top cap, and combustible gas explosion chamber shell top links firmly with the top cap, and the bottom links firmly with adjacent chamber shell of air, lets out and explodes the film and fix on annular bulkhead, and adjacent chamber shell inner wall of air is equipped with round annular arch, and annular bulkhead sets up on the annular arch, at least two explosion-proof fans symmetry set up in combustible gas explosion chamber shell, be annular evenly distributed at least 6 mounting holes on the combustible gas explosion chamber shell, link firmly a spiral closing cap on every mounting hole.
The flammable gas explosion cavity shell and the air adjacent cavity shell are cylindrical, the diameters of the flammable gas explosion cavity shell and the air adjacent cavity shell are equal, and the bottom of the air adjacent cavity shell is a sealing plane.
The annular bulge of the air adjacent to the inner wall of the cavity shell is positioned at the top of the annular bulge.
The cavity-separated gas explosion experimental device further comprises a sealing gasket, wherein the sealing gasket is arranged at the junction of the flammable gas explosion cavity shell and the top cover and the junction of the flammable gas explosion cavity shell and the air adjacent cavity shell.
The cavity-separating type gas explosion experimental device further comprises a damping cushion layer, wherein the damping cushion layer is positioned between the air adjacent cavity shell and the ground.
The air adjacent cavity shell is internally provided with a homogeneous fine sand layer and a pressure sensor, the thickness of the homogeneous fine sand layer is paved according to experimental requirements and used for adjusting the volume of air in the air adjacent cavity, and the pressure sensor is buried on the top surface of the homogeneous fine sand layer. The homogeneous fine sand layer plays a role in protecting the pressure sensor.
The outer part of the shell of the flammable gas explosion cavity is provided with annular equidistant mounting holes which are connected with the spiral sealing cover through flanges; the screw type sealing covers are respectively provided with connectors which are respectively connected with an explosion-proof air pump, an air bottle, a vacuum pressure gauge, an igniter and a concentration analyzer to form an air distribution system, a concentration control system and an ignition system.
In order to ensure the safety and reliability of the experimental process, the metal explosion tank can resist explosion overpressure of 1.2MPa at maximum.
Compared with the prior art, the invention has the remarkable advantages that:
(1) The gas explosion experiment under various working conditions such as gas closed explosion, limited release explosion and the like can be conveniently carried out.
(2) The volume of the limited release space can be adjusted by paving the sand layer in the air adjacent cavity shell, so that the air adjacent cavity shell is more convenient and faster.
(3) The explosion venting film between the flammable gas explosion cavity shell and the air adjacent cavity shell and the replaceable spiral sealing cover distributed on the flammable gas explosion cavity shell at equal intervals are equivalent to the addition of various explosion venting ports, so that the experiment is safer and more efficient.
(4) The design of the air adjacent cavity provides a space for detecting the explosion venting member, so that the experimental device can be used as an explosion venting member detection platform convenient for industrial application.
Drawings
FIG. 1 is a schematic diagram of the whole structure of a chamber-separating type gas explosion experimental device.
FIG. 2 is a top view (with the top cover removed) of the chamber-separated gas explosion experimental apparatus of the present invention.
1, a metal explosion tank; 2. a damping cushion layer; 3. a base; 4. homogenizing the fine sand layer; 5. a pressure sensor; sixthly, sealing the cushion layer; 7. a bolt connection; 8. a screw cap; 9. a top cover; 10. a hook; 11. explosion venting film; 12. a flange; 13. an explosion-proof fan; 14. an explosion-proof air pump; 15. a vacuum pressure gauge; 16. an igniter; 17. a concentration analyzer; 18. a gas cylinder; 19. an annular spacer; 20. a flammable gas explosion chamber housing; 21. air adjacent cavity shell
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a chamber-separated gas explosion experimental device comprises a metal explosion tank 1, an annular bulkhead 19, an explosion venting film 11, an explosion-proof fan 13 and at least 6 spiral covers 8. The metal explosion tank 1 comprises a combustible gas explosion cavity shell 20, an air adjacent cavity shell 21 and a top cover 9, and bolt openings are uniformly distributed in the circumferential direction of the combustible gas explosion cavity shell 20, the air adjacent cavity shell 21 and the top cover 9.
The flammable gas explosion chamber housing 20 and the air adjacent chamber housing 21 are both cylindrical, and the diameters of the two are equal. The bottom of the flammable gas explosion cavity shell 20 is connected with the air adjacent cavity shell 21 by bolts, and an annular airtight cushion layer 6 is paved at the connection part, so that the air tightness in the experimental process is ensured. In the experimental process, the bottom of the flammable gas explosion cavity shell 20 is connected with the air adjacent cavity shell 21 by bolts and is not detached.
The diameter of the flammable gas explosion cavity shell 20 is equal to that of the circular top cover 9, the flammable gas explosion cavity shell and the circular top cover 9 are connected through bolts, and an annular airtight cushion layer 6 is paved at the joint, so that the air tightness and the safety in the experimental process are ensured.
A hook 10 is welded at the center above the top cover 9 to facilitate the lifting and moving. After each experiment, the top cover 9 needs to be lifted to replace the explosion venting membrane 11 in the annular bulkhead 19.
The bottom of the air adjacent cavity shell 21 is a sealing plane, and the bottom is provided with a base 3 to ensure the stability of the metal explosion tank 1 and lighten the pressure on the ground. A damping cushion layer 2 is laid between the base 3 and the bottom surface of the bottom of the air adjacent cavity shell 21 to reduce vibration of the metal explosion tank 1 in the experimental process and reduce damage to the ground.
The air adjacent cavity shell 21 is internally paved with homogeneous fine sand layers 4 with different thicknesses according to experimental requirements. The pressure sensor 5 is buried inside the sand layer 4, and the top surface is flush with the surface of the sand layer. The homogeneous fine sand layer 4 can also protect the pressure sensor 5 while adjusting the internal volume of the air adjacent to the cavity housing 21.
The flammable gas explosion chamber housing 20, the air adjacent chamber housing 21 and the top cover 9 are all made of high-strength metal, and can resist explosion overpressure of 1.2MPa at maximum.
A circle of annular metal bulges are welded on the top of the inner wall of the air adjacent cavity shell 21, an annular separation frame 19 is horizontally arranged on the annular bulges and fixed by self weight, a closed cushion layer is paved at the contact part of the bulges and the annular separation frame 19, and explosion venting films 11 with different breakdown pressures are paved on the annular separation frame 19 according to experimental requirements to separate the two cavities.
The annular separation frame 19 is divided into an upper subframe and a lower subframe, bolt openings are uniformly distributed along the annular circumference, the explosion venting film 11 is clamped between the upper subframe and the lower subframe in the operation process, and the upper subframe and the lower subframe are screwed by bolts. Four hooks are uniformly welded on the upper surface of the upper layer subframe of the annular bulkhead 19 and are used for carrying out hoisting movement of the annular bulkhead 19 in the experimental process.
At least two explosion-proof fans 13 are symmetrically arranged inside the flammable gas explosion chamber housing 20. The explosion-proof fan 13 is bound on the inner wall of the flammable gas explosion cavity shell 20 through steel wires, and the wind direction is horizontally arranged.
At least 6 mounting holes are distributed on the outer part of the flammable gas explosion cavity shell 20 in an annular equidistant mode, and each mounting hole is connected with the spiral cover 8 through a flange 12. The center of the spiral sealing cover 8 is provided with a spiral connection port, and the spiral sealing cover, the explosion-proof air pump 14, the air bottle 18, the vacuum pressure gauge 15 and the concentration analyzer 17 form an air distribution system. The sealing adhesive tape is bound on a connecting port formed in the center of the spiral sealing cover 8, and latex sealing is adopted after the sealing adhesive tape is in spiral connection with the explosion-proof air pump 14, the air bottle 18, the vacuum pressure gauge 15 and the concentration analyzer 17, so that the air tightness is ensured. The gas cylinder 18 sends the combustible gas into the combustible gas explosion cavity shell 20 through the slender gas inlet pipe, fine gas inlet holes are densely distributed on the slender gas inlet pipe, and the uniformity of the concentration of the gas in the gas cylinder can be ensured by combining the explosion-proof fan 13.
A spiral sealing cover 8 outside the flammable gas explosion cavity shell 20 is in spiral connection with an igniter to form an ignition system, and an ignition head of an ignition head device penetrates into the flammable gas explosion cavity shell 20 to ignite, so that an electric spark ignition head or a resistance wire ignition head can be selected according to experimental requirements.
The operation steps of the cavity-separated gas explosion experimental device are as follows:
and step 1, hoisting the flammable gas explosion cavity shell 20, the air adjacent cavity shell 21 and the top cover 9 to a designated place, and connecting the flammable gas explosion cavity shell 20 and the air adjacent cavity shell 21 into a whole by using the bolt connecting piece 7.
Step 2, paving homogeneous fine sand layers 4 with different thicknesses inside the air adjacent cavity shell 21 according to experimental requirements, and burying the pressure sensor 5 in the homogeneous fine sand layers, wherein the surface of the sensor 5 is flush with the surface of the sand layers 4. The explosion venting member to be tested can be horizontally placed on the sand layer 4 according to the requirements.
And 3, clamping the explosion venting films 11 with different breakdown pressures between an upper subframe and a lower subframe of the annular separation frame 19 according to experimental requirements, and tightening bolts uniformly distributed along the circumference of the annular separation frame 19 to integrate the explosion venting films 11 and the annular separation frame 19. The annular frame 19 with the explosion venting membrane is placed on an annular bulge on the inner wall of the top of the air adjacent cavity shell 21 by using a gantry crane, and a sealing cushion layer is paved between the bulge and the annular frame 19.
And 4, binding the explosion-proof fan 13 on the inner wall of the flammable gas explosion cavity shell 20 by utilizing an iron wire, hanging the top cover 9 on the flammable gas explosion cavity shell 20 by utilizing a gantry crane, and connecting and fixing by utilizing bolts.
And 5, connecting the holes on the cavity of the flammable gas explosion cavity shell 20 with the spiral sealing cover 8 with the holes through a flange. The center of the spiral sealing cover 8 is provided with a spiral connecting port which is respectively connected with an explosion-proof air pump 14, an air bottle 18, a vacuum pressure gauge 15 and a concentration analyzer 17 and an igniter 16. And after connection, coating emulsion on each interface for sealing. During the experiment, the explosion-proof air pump 14 is started to pump the interior of the flammable gas explosion cavity 20 to negative pressure, then the air pump is closed, the air bottle 18 is opened for air intake, and the concentration is controlled by the vacuum pressure gauge 15 and the concentration analyzer 17.
And 6, closing the gas distribution system after the specified concentration is reached, removing the spiral sealing cover 8 connected with the gas distribution system, and changing the spiral sealing cover into a fully-closed sealing cover or a ring-shaped spiral cover with a explosion venting film according to experimental requirements.
And 7, starting an explosion-proof fan 13 bound on the inner wall of the combustible gas explosion cavity 20. After 3 minutes, the fan was turned off and a hole was connected to the igniter 16 via the screw cap 8, personnel and gas cylinders were standing, and the ignition experiment was performed.
In conclusion, the invention can perform various gas explosion experiments under airtight and different explosion venting conditions, is used for detecting industrial explosion venting components, and has better safety and convenience.
Claims (5)
1. A divide chamber formula gas explosion experimental apparatus, its characterized in that: the explosion-proof device comprises a metal explosion tank (1), an annular separation frame (19), an explosion-proof film (11), explosion-proof fans (13) and at least 6 spiral sealing covers (8), wherein the metal explosion tank (1) comprises a combustible gas explosion cavity shell (20), an air adjacent cavity shell (21) and a top cover (9), the top of the combustible gas explosion cavity shell (20) is fixedly connected with the top cover (9), the bottom of the combustible gas explosion cavity shell is fixedly connected with the air adjacent cavity shell (21), the explosion-proof film (11) is fixed on the annular separation frame (19), a circle of annular protrusions are arranged on the inner wall of the air adjacent cavity shell (21), the annular separation frame (19) is arranged on the annular protrusions, at least two explosion-proof fans (13) are symmetrically arranged in the combustible gas explosion cavity shell (20), at least 6 mounting holes are annularly and uniformly distributed on the combustible gas explosion cavity shell (20), and one spiral sealing cover (8) is fixedly connected on each mounting hole;
the flammable gas explosion cavity shell (20) and the air adjacent cavity shell (21) are cylindrical, the diameters of the flammable gas explosion cavity shell and the air adjacent cavity shell are equal, and the bottom of the air adjacent cavity shell (21) is a sealing plane;
the annular bulge of the inner wall of the air adjacent cavity shell (21) is positioned at the top of the annular bulge;
a homogeneous fine sand layer (4) and a pressure sensor (5) are arranged in the air adjacent cavity shell (21), the thickness of the homogeneous fine sand layer (4) is paved according to experimental requirements and is used for adjusting the volume of air in the air adjacent cavity (21), and the pressure sensor (5) is buried on the top surface of the homogeneous fine sand layer (4); the homogeneous fine sand layer (4) simultaneously plays a role in protecting the pressure sensor (5).
2. The split-chamber gas explosion experimental apparatus according to claim 1, wherein: the gas explosion chamber further comprises a sealing gasket (6), wherein the sealing gasket (6) is arranged at the connection surface of the flammable gas explosion chamber housing (20) and the top cover (9) and the connection surface of the flammable gas explosion chamber housing (20) and the air adjacent chamber housing (21).
3. The split-chamber gas explosion experimental apparatus according to claim 1, wherein: the air-adjacent cavity type air-adjacent cavity is characterized by further comprising a damping cushion layer (2), wherein the damping cushion layer (2) is positioned between the air-adjacent cavity shell (21) and the ground.
4. The split-chamber gas explosion experimental apparatus according to claim 1, wherein: the outside of the flammable gas explosion cavity shell (20) is provided with annular equidistant mounting holes, and the flammable gas explosion cavity shell is connected with the spiral sealing cover (8) through a flange; the spiral sealing covers (8) are respectively provided with connectors which are respectively connected with an explosion-proof air pump, an air bottle, a vacuum pressure gauge, an igniter and a concentration analyzer to form an air distribution system, a concentration control system and an ignition system.
5. The split-chamber gas explosion experimental apparatus according to claim 1, wherein: in order to ensure the safety and reliability of the experimental process, the metal explosion tank (1) can resist explosion overpressure of 1.2MPa at maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711021.2A CN109030559B (en) | 2018-07-03 | 2018-07-03 | Cavity-separated gas explosion experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711021.2A CN109030559B (en) | 2018-07-03 | 2018-07-03 | Cavity-separated gas explosion experimental device |
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| Publication Number | Publication Date |
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| CN109030559A CN109030559A (en) | 2018-12-18 |
| CN109030559B true CN109030559B (en) | 2023-11-10 |
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| CN201810711021.2A Active CN109030559B (en) | 2018-07-03 | 2018-07-03 | Cavity-separated gas explosion experimental device |
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2018
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