Testing device for flame acceleration and detonation-to-detonation conversion based on column group disturbance

Abstract

The invention discloses a testing device for flame acceleration and detonation-to-detonation conversion based on column group disturbance, which comprises a detonation chamber and a column group assembly arranged in the detonation chamber, the column group assembly is detachably arranged in the detonation chamber, the column group assembly comprises a base and a plurality of column modules, the column modules are arranged on the base, each column module comprises a first mounting part and a testing part, and the testing part is arranged on the base. The base comprises a second mounting part, and the first mounting part is detachably connected to the second mounting part. Therefore, the column modules can be flexibly arranged in the longitudinal spacing and the transverse spacing of the base in a detachable combination mode, and the test efficiency of flame acceleration and detonation-to-detonation tests can be improved. And meanwhile, when flame acceleration and detonation-to-detonation tests under the condition of different column shapes or column sizes are carried out, column modules with different cross section shapes and sizes can be conveniently replaced, so that processing of a large number of fixed obstacles can be avoided, and the test cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fire safety, and in particular to a testing device based on flame acceleration and deflagration-to-detonation conversion under column group disturbance. Background Art

[0002] Combustible gas explosion accidents are a common type of safety accident in industrial production and daily life. Once they occur, they will seriously threaten the safety of people's lives and property. With the increasing demand for energy, accidental explosions of combustible gas are becoming more and more frequent. In real scenes involving combustible gas, there are often groups of columnar structures (i.e., column groups), such as cooling pipes, storage tank groups, and building support columns. Combustible gas leaks and mixes with air, and is ignited when it encounters an open flame or a high-temperature wall. The flame propagation gradually accelerates under the action of flame instability. In particular, if there is a column group in the flame propagation channel, it will greatly promote flame acceleration, causing slow deflagration to develop into rapid deflagration, and even transform into a highly destructive detonation. Therefore, for the sake of engineering applications such as gas explosion accident prevention and detonation propulsion technology research and development, it is necessary to conduct in-depth research on the flame acceleration and deflagration-to-detonation phenomenon under column group disturbance.

[0003] The premixed flame propagates downstream along the length of the pipeline in the test section. During this process, the flame front, gas flow and pressure wave are disturbed by the column group. The structural arrangement of the column group involves factors such as longitudinal column spacing, transverse column spacing, column shape and column size, where longitudinal and transverse refer to parallel and perpendicular to the length direction of the test section, respectively. Studies have shown that the longitudinal column spacing, transverse column spacing, column shape and column size of the column group have an important influence on gas flame acceleration and deflagration to detonation. Therefore, it is necessary to comprehensively consider these factors in flame acceleration and deflagration to detonation tests.

[0004] A lot of research has been conducted in the prior art on the flame acceleration and deflagration-to-detonation phenomenon under the action of traditional obstacles. However, the traditional obstacle form adopted by the institute is mainly to arrange multiple orifice plates or fence-type obstacles along the longitudinal direction of the pipeline. Compared with this traditional unidirectional obstacle arrangement, the structure of the column group is more complex, the processing is more difficult, and the cost is higher. As a result, there is a lack of test data on flame acceleration and deflagration-to-detonation phenomenon under column group disturbance, which is not conducive to studying the development of combustible gas deflagration under various column group scenarios. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance, which makes the longitudinal and transverse spacings of the column group flexible and changeable through a modular combination of column group structures, and the column shape and size distribution are easy to change, which is conducive to studying the influence of column group structures with different spacings, different shapes and different sizes on gas flame acceleration and deflagration-to-detonation transition.

[0006] A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to an embodiment of the present invention comprises:

[0007] A deflagration chamber, wherein an air inlet and an igniter are provided at one end of the deflagration chamber, an air outlet is provided at the other end, and a transparent observation window is provided on the side wall of the deflagration chamber between the air inlet and the air outlet;

[0008] A column group assembly, wherein the column group assembly is detachably arranged in the deflagration chamber, the column group assembly comprises a base and a column module, a plurality of the column modules are arranged on the base, wherein the column module comprises a first mounting portion and a testing portion, the base comprises a second mounting portion, and the first mounting portion is detachably connected to the second mounting portion.

[0009] According to some embodiments of the present invention, the deflagration chamber comprises a deflagration pipe, a first end plate and a second end plate, wherein the first end plate is detachably provided at one end of the deflagration pipe, and / or the second end plate is detachably provided at the other end of the deflagration pipe.

[0010] According to some embodiments of the present invention, the explosion pipe includes a top plate and a bottom plate that are relatively arranged, and a first side plate and a second side plate that are relatively arranged, and the top plate, the bottom plate, the first side plate and the second side plate together enclose the explosion pipe in a square tube shape, and the two ends of the first side plate are respectively detachably connected to the top plate and the bottom plate, and / or the second side plate is respectively detachably connected to the top plate and the bottom plate.

[0011] According to some embodiments of the present invention, the base includes a slider unit, a plurality of the second mounting portions are provided on the slider unit, slide grooves are respectively provided on the relative inner walls of the explosion chamber, two ends of the slider unit are respectively limited in the slide grooves, and a plurality of the slider units are adjacently arranged.

[0012] According to some embodiments of the present invention, the first mounting portion is a stepped column, the second mounting portion is a stepped hole, and the column is inserted into the stepped hole.

[0013] According to some embodiments of the present invention, the first mounting portion is a stud, and the second mounting portion is a threaded hole.

[0014] According to some embodiments of the present invention, the column group assembly further comprises a plug, and the plug is detachably provided on a portion of the second mounting portion.

[0015] According to some embodiments of the present invention, a pressure sensor is further included, and at least one of the pressure sensors is disposed on a side wall of the deflagration chamber.

[0016] Beneficial effects:

[0017] The present invention can realize flexible arrangement of column modules in the longitudinal and transverse spacing of the base through a detachable combination mode, which is beneficial to improving the test efficiency of flame acceleration and deflagration to detonation test. At the same time, the shape and size of the test part of different column modules have an impact on gas flame acceleration and deflagration to detonation. When conducting flame acceleration and deflagration to detonation tests under different column shapes or column sizes, column modules with different cross-sectional shapes and sizes can be easily replaced, thereby avoiding the processing of a large number of fixed obstacles, so as to greatly reduce the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a test device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention;

[0020] Figure 2 FIG. 1 is a schematic cross-sectional view of a test device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 3 is a schematic diagram of the internal structure of a deflagration chamber according to an embodiment of the present invention;

[0022] Figure 4 FIG. 1 is a schematic cross-sectional view of a test device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention. Figure 2 ;

[0023] Figure 5 is a schematic structural diagram of a slider unit according to an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the structure of a column module according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Test device for flame acceleration and deflagration to detonation based on column group disturbance;

[0027] 1. Deflagration chamber; 11. First end plate; 12. Second end plate; 13. Deflagration duct; 131. Top plate; 132. Bottom plate; 133. First side plate; 134. Second side plate; 21. Base; 211. Second mounting portion; 22. Column module; 221. First mounting portion; 222. Test portion; 31. Air inlet; 32. Air outlet; 33. Igniter; 34. Transparent observation window; 4. Slider unit; 5. Slide groove; 6. Plug; 7. Pressure sensor. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present disclosure in conjunction with the drawings in the embodiments disclosed in this application. The description of the embodiments is actually only illustrative and exemplary, and does not serve as any limitation to the present disclosure and its application or use; based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without carrying out creative work should fall within the scope of protection of the present disclosure. In addition, the technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be regarded as part of the specification.

[0029] Reference below Figures 1 to 6 A testing device 100 based on flame acceleration and deflagration-to-detonation transition under column group disturbance according to an embodiment of the present invention is described.

[0030] Specifically, Figures 1 to 4 As shown, a test device 100 for flame acceleration and deflagration-to-detonation conversion based on column group disturbance according to an embodiment of the present invention at least comprises: a deflagration chamber 1 and a column group assembly arranged in the deflagration chamber 1, wherein an air inlet 31 and an igniter 33 are arranged at one end of the deflagration chamber 1, and an air outlet 32 ​​is arranged at the other end, and a transparent observation window 34 is arranged on the side wall of the deflagration chamber 1 between the air inlet 31 and the air outlet 32, for performing optical schlieren high-speed photography, so as to photograph the flame propagation process and the spatiotemporal evolution of shock waves and turbulence. The column group assembly is detachably arranged in the deflagration chamber 1, and the column group assembly comprises a base 21 and a column module 22, and a plurality of column modules 22 are arranged on the base 21, wherein the column module 22 comprises a first mounting portion 221 and a testing portion 222, and the base 21 comprises a second mounting portion 211, and the first mounting portion 221 is detachably connected to the second mounting portion 211.

[0031] When in use, the number, shape and installation position of the column modules 22 are determined according to the requirements of the longitudinal spacing and transverse spacing of the column group, the shape and size distribution of the column modules 22, and then the column modules 22 are connected to the second installation part 211 of the base 21 through the first installation part 221 to achieve the installation and fixation of the column modules 22. Therefore, the column modules 22 can be flexibly arranged in the longitudinal spacing and transverse spacing of the base 21 through the detachable combination method, which is conducive to improving the test efficiency of the flame acceleration and deflagration to detonation test.

[0032] At the same time, the shape and size of the test portion 222 of different column modules 22 have an impact on gas flame acceleration and deflagration to detonation conversion. When conducting flame acceleration and deflagration to detonation conversion tests under conditions of different column shapes or column sizes, the column modules 22 with different cross-sectional shapes and sizes can be easily replaced, thereby avoiding the processing of a large number of fixed obstacles, thereby greatly reducing the test cost.

[0033] Further, based on the above embodiment, Figure 1 and Figure 2 As shown, the deflagration chamber 1 includes a deflagration pipe 13, a first end plate 11 and a second end plate 12, wherein the first end plate 11 is detachably arranged at one end of the deflagration pipe 13, and / or the second end plate 12 is detachably arranged at the other end of the deflagration pipe 13. When in use, the column module 22 can be moved or replaced in the deflagration chamber 1 by disassembling the first end plate 11 or the second end plate 12.

[0034] Preferably, the deflagration pipe 13 includes a top plate 131 and a bottom plate 132 that are arranged opposite to each other, and a first side plate 133 and a second side plate 134 that are arranged opposite to each other. During assembly, the top plate 131, the bottom plate 132, the first side plate 133 and the second side plate 134 are used to enclose the square tube-shaped deflagration pipe 13, and the two ends of the first side plate 133 are detachably connected to the top plate 131 and the bottom plate 132, respectively, and / or the second side plate 134 is detachably connected to the top plate 131 and the bottom plate 132, respectively. In this way, on the one hand, the deflagration pipe 13 can be split into smaller unit structures, so that it is easy to place and transport, and the floor space is reduced. On the other hand, the column module 22 can be replaced or moved more conveniently by removing the side plates, thereby improving the test efficiency.

[0035] Specifically, when the first side plate 133 or the second side plate 134 can only be removed separately, when it is necessary to replace or move the column module 22, the operation can be achieved by removing the side plate on one side. When the first side plate 133 and the second side plate 134 can be removed at the same time, at this time, the deflagration duct 13 is equivalent to being composed of four plates spliced ​​together, so that the operation of replacing or moving the column module 22 can be achieved by removing the top plate 131.

[0036] Therefore, various combinations can be achieved through the different combination structures of the above-mentioned deflagration chamber 1, thereby facilitating the operation of moving and replacing the column module 22 and effectively improving the test efficiency.

[0037] In some embodiments of the present invention, Figure 3 and Figure 5 As shown, the base 21 includes a slider unit 4, each slider unit 4 is provided with a plurality of second mounting portions 211, and slide grooves 5 are respectively provided on the relative inner walls of the explosion chamber 1, the two ends of the slider unit 4 are respectively limited in the slide grooves 5, and a plurality of slider units 4 are adjacently arranged.

[0038] When in use, the plate on one side of the explosion chamber 1 can be removed and the slider unit 4 can be slid in. In this way, when a part of the column module 22 needs to be replaced, the slider unit 4 of the corresponding part can be pulled out separately to avoid pulling out the entire base 21, which is beneficial to improving the convenience of replacing the column module 22.

[0039] In addition, when conducting flame acceleration and deflagration-to-detonation tests, there may be relatively violent shock waves in the deflagration chamber 1, which will produce a large impact force on the column module 22, and the various forms of the assembled column module 22 after being impacted may seriously affect the accuracy of the test results. Therefore, adopting a sliding structure for the slider unit 4 can not only facilitate movement and replacement of the column module 22, but also utilize the structure of the slide groove 5 to limit the slider unit 4, effectively improving the stability of the base 21, thereby preventing the base 21 from being deformed after being subjected to the force of the column module 22, thereby affecting the final test results.

[0040] In some embodiments of the present invention, Figure 6 As shown, the first mounting portion 221 is a column, and the second mounting portion 211 is a stepped hole. During assembly, the column is inserted into the stepped hole. Specifically, the stepped hole is composed of two vertical large square holes and a small square hole with coaxial axes, and the small square hole is above the large square hole. The square hole design is beneficial to prevent the components in the hole from rotating, and at the same time, a larger space can be obtained to design the shape and size of the column.

[0041] When in use, the column module 22 is inserted from bottom to top along the large square hole of the stepped hole, and when the column module 22 is completely embedded in the stepped hole, the test portion 222 of the column module 22 extends out of the small square hole, and the first mounting portion 221 is embedded in the stepped hole. This ensures the installation stability of the column module 22 and prevents the test shock wave from having a significant impact on the shape of the column module 22.

[0042] Preferably, in some embodiments of the present invention, the first mounting portion 221 may also be a stud, and the second mounting portion 211 is a threaded hole, so that the stud can be directly screwed into the threaded hole during assembly, thereby improving assembly efficiency.

[0043] In some embodiments of the present invention, the column group assembly also includes a plug 6, which is detachably provided on a portion of the second mounting portion 211. When in use, a portion of the second mounting portion 211 on the base 21 will be occupied by the column module 22, and the unoccupied second mounting portion 211 can be assembled with the plug 6, thereby reducing the impact of the exposed second mounting portion 211 on the test, thereby improving the test accuracy.

[0044] In some embodiments of the present invention, a pressure sensor 7 is further included. At least one pressure sensor 7 is arranged on the side wall of the deflagration chamber 1. In this way, the pressure sensor 7 can measure the pressure changes during the flame acceleration and the process of deflagration to detonation, thereby realizing the synchronous measurement of optical measurement and pressure measurement, and the changing law of flame acceleration and the process of deflagration to detonation can be more clearly understood.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0047] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance, characterized in that: include: A deflagration chamber, wherein an air inlet and an igniter are provided at one end of the deflagration chamber, an air outlet is provided at the other end, and a transparent observation window is provided on the side wall of the deflagration chamber between the air inlet and the air outlet; A column group assembly, wherein the column group assembly is detachably arranged in the deflagration chamber, the column group assembly comprises a base and a column module, a plurality of the column modules are arranged on the base, wherein the column module comprises a first mounting portion and a testing portion, the base comprises a second mounting portion, and the first mounting portion is detachably connected to the second mounting portion.

2. A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: The deflagration chamber comprises a deflagration pipe, a first end plate and a second end plate, wherein the first end plate is detachably arranged at one end of the deflagration pipe, and / or the second end plate is detachably arranged at the other end of the deflagration pipe.

3. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 2, characterized in that: The explosion pipe includes a top plate and a bottom plate arranged opposite to each other, and a first side plate and a second side plate arranged opposite to each other. The top plate, the bottom plate, the first side plate and the second side plate jointly enclose the explosion pipe in a square tube shape. The two ends of the first side plate are respectively detachably connected to the top plate and the bottom plate, and / or the second side plate is respectively detachably connected to the top plate and the bottom plate.

4. A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 2 or 3, characterized in that: The base includes a slider unit, a plurality of the second mounting parts are provided on the slider unit, slide grooves are respectively provided on the opposite inner side walls of the explosion chamber, two ends of the slider unit are respectively limited in the slide grooves, and a plurality of the slider units are adjacently arranged.

5. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: The first mounting portion is a stepped column, the second mounting portion is a stepped hole, and the column is inserted into the stepped hole.

6. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: The first mounting portion is a stud, and the second mounting portion is a threaded hole.

7. A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 5 or 6, characterized in that: The column group assembly further comprises a plug, and the plug is detachably arranged on a portion of the second mounting portion.

8. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: It also includes a pressure sensor, at least one of which is arranged on the side wall of the explosion chamber.

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