CN217443268U

CN217443268U - Deflagration test device

Info

Publication number: CN217443268U
Application number: CN202220091982.XU
Authority: CN
Inventors: 胡红革; 张雄辉
Original assignee: Sichuan Kunhong Yuanxiang Technology Co ltd
Current assignee: Sichuan Kunhong Yuanxiang Technology Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-09-16
Anticipated expiration: 2032-01-14

Abstract

The application discloses a deflagration test device which comprises a test bed, wherein a test tube is arranged at the top of the test bed, the bottom of the test tube is communicated with an air inlet pipeline, and a feeding mechanism is arranged on the air inlet pipeline; wherein feeding mechanism is connected with charging hopper including connecting the inlet pipe on the admission line at the inlet pipe top, is provided with the control valve on the inlet pipe, and this application has can add the dust granule again after the evacuation, reduce the loss of dust granule, the advantage that has improved the accuracy of experimental data.

Description

Deflagration test device

Technical Field

The application relates to the technical field of fire control tests, in particular to a deflagration test device.

Background

Detonation is a combustion wave that propagates by heat transfer at a velocity less than the speed of sound. Ignition of the combustible mixture in the exhaust gas recovery treatment system can lead to deflagration with 10 times of initial pressure, and the propagation speed can reach 10-300 m/s generally. Three conditions (namely, three elements of the detonation) are required for the generation of the detonation, and one of the conditions is not required. Firstly, fuel and combustion air are accumulated; secondly, the fuel and air mixture reaches the concentration of detonation; thirdly, enough ignition energy sources are available.

For carrying out scientific research to dust explosion detonation phenomenon, need use various test device, current detonation test device is through filling dust particle in advance in the test tube, then to test tube evacuation, input a certain amount of gas through the pipeline again in the test tube and mix with the dust, the reignition after mixing, thereby simulation detonation emergence phenomenon, but at the evacuation in-process, because dust particle is also in test tube, a part is taken away easily to the misoperation, the quantitative of actual dust particle is less, finally lead to influencing experimental data.

SUMMERY OF THE UTILITY MODEL

The application provides a main aim at provides a detonation test device, aims at solving current detonation test device evacuation in-process and takes away the part easily and lie in the dust granule of test tube, influences the technical problem of experimental data.

In order to achieve the purpose, the detonation testing device comprises a testing table, wherein a testing pipe is arranged at the top of the testing table, the bottom of the testing pipe is communicated with an air inlet pipeline, and a feeding mechanism is arranged on the air inlet pipeline; wherein feeding mechanism is connected with the feeding funnel including the inlet pipe of connection on the admission line in the inlet pipe top, is provided with the control valve on the inlet pipe.

Optionally, the test tube includes that the embedding locates the sealed pad of test bench top surface, and sealed top of filling up is provided with the quartz capsule, and the admission line runs through the test bench simultaneously with sealed pad and communicate with the quartz capsule, and the quartz capsule top is provided with explosion-proof cover, and explosion-proof cover's compressive strength is less than the compressive strength of quartz capsule.

Optionally, a movable plate is hinged to the top surface of the sealing gasket, the movable plate can cover the top pipe opening of the air inlet pipeline, a limiting spring is arranged on the inner side wall of the quartz tube close to the movable plate, and the limiting spring is horizontally arranged and can be in contact with the movable plate.

Optionally, the inner wall of the quartz tube is provided with an igniter.

Optionally, the top of the test bed is provided with a plurality of supports surrounding the outer side of the test tube in an annular array, and the top of each support is connected with a heating device for heating the test tube.

Optionally, the heating device comprises a heating jacket, the test tube is located in the heating jacket, a distance is formed between the outer wall of the test tube and the inner wall of the heating jacket, and a heating pipe is arranged on the inner wall of the heating jacket.

Optionally, a clamping mechanism is arranged on the test bed and comprises at least two arc sleeves, the arc sleeves are attached to the joint of the outer wall of the quartz tube and the sealing gasket, one side, away from the quartz tube, of each arc sleeve is connected with a telescopic cylinder, and the telescopic cylinder is located at the top of the test bed.

Optionally, the inlet pipe includes the first trachea with the test tube intercommunication, the inlet pipe is connected on first trachea, first trachea is connected with first solenoid valve, first solenoid valve is connected with the second trachea, the second trachea is connected with third trachea and fourth trachea respectively, third trachea and fourth trachea all are connected with the second solenoid valve, two second solenoid valves are connected with oxygen storage tank and combustible gas storage tank respectively.

Optionally, first trachea includes the connecting pipe with the test tube intercommunication, and the connecting pipe bottom is connected with the concertina ripple pipe that is located the test bench below, and concertina ripple socle portion is connected with the conveying pipe that the level was arranged, and first solenoid valve is connected to the conveying pipe other end, and the inlet pipe is connected on the conveying pipe, and the test bench bottom is provided with the multiunit pneumatic cylinder.

Optionally, a gas flow meter is disposed on each of the third gas pipe and the fourth gas pipe.

The beneficial effect that this application can realize is as follows:

this application can follow test tube outside interpolation dust granule through reinforced mechanism, consequently can be earlier after to test tube evacuation, add dust granule from the feed hopper again and make it get into the admission line in, then close the control valve, when going into gas through the admission line in the test tube, can drive dust granule and get into in the test tube jointly, thereby avoid dust granule to be taken away the part by the evacuation in advance, reduce the loss, improve the accuracy of experimental data, and simultaneously, dust granule has been through and gaseous intensive mixing in admission line transportation process, need not to carry out hybrid processing again after getting into the test tube, and the efficiency is improved.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings that are needed in the detailed description of the present application or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of a detonation testing apparatus in an embodiment of the present application;

FIG. 2 is a schematic exterior view of a deflagration test apparatus according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of the internal structure of a heating device according to an embodiment of the present application;

fig. 4 is a schematic structural view (top view) of a clamping mechanism in an embodiment of the present application.

Reference numerals:

110-test bench, 120-test tube, 121-sealing gasket, 122-quartz tube, 123-explosion-proof cover, 130-feeding mechanism, 131-feeding tube, 132-feeding funnel, 133-control valve, 140-movable plate, 150-limiting spring, 160-igniter, 170-bracket, 180-heating device, 181-heating jacket, 182-heating tube, 190-clamping mechanism, 191-arc jacket, 192-telescopic cylinder, 210-first gas tube, 211-connecting tube, 212-telescopic bellows, 213-feeding tube, 220-first electromagnetic valve, 230-second gas tube, 240-third gas tube, 250-fourth gas tube, 260-second electromagnetic valve, 270-oxygen storage tank, 280-combustible gas storage tank, 290-hydraulic cylinder, 310-gas flow meter.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indicator is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Examples

Referring to fig. 1 to 4, the present embodiment provides a deflagration test apparatus, including a test bed 110, a test tube 120 is disposed at the top of the test bed 110, an air inlet pipeline is communicated with the bottom of the test tube 120, and a charging mechanism 130 is disposed on the air inlet pipeline; wherein the feeding mechanism 130 comprises a feeding pipe 131 connected to the air inlet pipeline, a feeding funnel 132 is connected to the top of the feeding pipe 131, and a control valve 133 is disposed on the feeding pipe 131.

In this embodiment, can follow test tube 120 outside through feeding mechanism 130 and add the dust granule, consequently can be earlier to test tube 120 evacuation back, add the dust granule from feed hopper 132 again and make it get into the admission line in, then close control valve 133, when gaseous toward test tube 120 internal input through the admission line, can drive in the dust granule gets into test tube 120 jointly, thereby avoid the dust granule to be taken away the part by evacuation in advance, reduce the loss, improve the accuracy of experimental data, and simultaneously, the dust granule has been through fully mixing with the gas in admission line transportation process, need not to carry out mixing process again after getting into test tube 120, and the efficiency is improved.

It should be noted that, the charging hopper 132, the feeding pipe 131 and the whole or inner wall portion of the air inlet duct are made of stainless steel materials with smooth surfaces, so that the adhesion of dust particles in the adding and conveying processes can be reduced, the loss amount is reduced, and when the dust particles are added, the adding amount is larger than that in the actual test, and the accuracy of experimental data is improved as much as possible; in addition, the gas introduced into the intake duct should be a combustion-supporting gas (e.g., oxygen) or a combustible gas.

As an alternative embodiment, the test tube 120 comprises a sealing gasket 121 embedded on the top surface of the test bed 110, a quartz tube 122 is arranged on the top of the sealing gasket 121, the air inlet pipe simultaneously penetrates through the test bed 110 and the sealing gasket 121 and is communicated with the quartz tube 122, an explosion-proof cover 123 is arranged on the top of the quartz tube 122, and the pressure resistance of the explosion-proof cover 123 is smaller than that of the quartz tube 122. The inner wall of the quartz tube 122 is provided with an igniter 160.

In this embodiment, when the dust particles and the gas are mixed and enter the quartz tube 122, the igniter 160 is turned on to simulate the deflagration experiment, and when the deflagration is violent, the explosion-proof cover 123 can be ruptured and exploded before the quartz tube 122 bursts, so as to achieve the pressure relief effect, reduce the risk of explosion of the quartz tube 122, and improve the safety.

It should be noted that a circle of sealing groove should be formed at the top of the sealing gasket 121, and the bottom of the quartz tube 122 is sealed and clamped in the sealing groove to ensure the sealing property inside the quartz tube 122; the igniter 160 may be a capacitive igniter, and ignition energy may be tested by adjusting the amount of the stored electric energy of the capacitor; when the quartz tube 122 is evacuated, an evacuation device (not shown) can be connected to the explosion-proof cover 123.

As an alternative embodiment, the top surface of the sealing gasket 121 is hinged with a movable plate 140, the movable plate 140 can cover the top nozzle of the intake duct, the inner side wall of the quartz tube 122 near the movable plate 140 is provided with a limiting spring 150, and the limiting spring 150 is horizontally arranged and can contact with the movable plate 140.

In this embodiment, when gas and dust particles enter the quartz tube 122 from the top nozzle of the gas inlet pipe, the movable plate 140 can be automatically opened to open the nozzle, when gas filling is stopped, the movable plate 140 can be automatically closed to block the top nozzle of the gas inlet pipe, so as to prevent the dust particles from settling into the gas inlet pipe, if the gas impact force is large to drive the movable plate 140 to rotate beyond 90 °, the movable plate 140 is blocked by the limiting spring 150 to prevent the dust particles from turning to the other side, and the dust particles rotate toward the direction close to the nozzle under the elastic reaction force, so that the movable plate 140 can always cover the nozzle.

As an alternative embodiment, the top of the test bed 110 is provided with a plurality of supports 170 surrounding the outer side of the test tube 120 in an annular array, and the top of the supports 170 is connected with a heating device 180, and the heating device 180 is used for heating the test tube 120. The heating device 180 comprises a heating sleeve 181, the test tube 120 is located in the heating sleeve 181, a distance is reserved between the outer wall of the test tube 120 and the inner wall of the heating sleeve 181, and a heating pipe 182 is arranged on the inner wall of the heating sleeve 181.

In this embodiment, the heating pipe 182 heats the whole heating jacket 181, so that the test tube 120 is heated uniformly, and the influence of different temperatures on dust explosion and deflagration can be tested. The heating pipe can be arranged in a wave shape, so that the heating area is increased, and meanwhile, a heat-insulating sleeve (not shown in the figure) can be sleeved on the outer wall of the heating sleeve 181, so that the heat loss is reduced, and workers are prevented from being scalded.

As an optional implementation manner, a clamping mechanism 190 is arranged on the test bed 110, the clamping mechanism 190 includes at least two arc-shaped sleeves 191, the arc-shaped sleeves 191 are attached to the joints of the outer walls of the quartz tubes 122 and the sealing gaskets 121, one side of the arc-shaped sleeves 191, which is far away from the quartz tubes 122, is connected with a telescopic cylinder 192, and the telescopic cylinder 192 is located at the top of the test bed 110.

In this embodiment, when the quartz tube 122 is damaged and needs to be replaced with a new one, the quartz tube 122 can be taken off from the sealing gasket 121, the new quartz tube 122 is then mounted on the sealing gasket 121, and the arc-shaped sleeve 191 is driven by the telescopic cylinder 192 to approach the quartz tube 122 and clamp the quartz tube 122, so that the fixing effect is improved, and meanwhile, the sealing performance of the quartz tube 122 is improved. The sealing gasket 121 and the arc-shaped sleeve 191 can be made of rubber, so that the sealing effect is good; the telescopic cylinder 192 can be a cylinder or an oil cylinder.

As an alternative embodiment, the air inlet pipeline includes a first air pipe 210 communicated with the test tube 120, the inlet pipe 131 is connected to the first air pipe 210, the first air pipe 210 is connected to a first electromagnetic valve 220, the first electromagnetic valve 220 is connected to a second air pipe 230, the second air pipe 230 is connected to a third air pipe 240 and a fourth air pipe 250, the third air pipe 240 and the fourth air pipe 250 are both connected to a second electromagnetic valve 260, and the two second electromagnetic valves 260 are connected to an oxygen storage tank 270 and a combustible gas storage tank 280, respectively. The third gas pipe 240 and the fourth gas pipe 250 are each provided with a gas flow meter 310.

In this embodiment, according to the test requirement, can open the second solenoid valve 260 that oxygen storage tank 270 and combustible gas storage tank 280 correspond respectively, open first solenoid valve 220 simultaneously, make corresponding gas loop through in second trachea 230 and the first trachea 210 gets into quartz capsule 122, thereby test the influence of different gases to dust explosion detonation respectively, also can open two second solenoid valves 260 simultaneously, open oxygen storage tank 270 and combustible gas storage tank 280 simultaneously promptly, test the mixed gas to the influence of dust explosion detonation, during the input gas, accessible gas flowmeter 310 monitors the quantity of input gas, thereby test the influence of different gas content to dust explosion detonation, and is flexible to use, can test to various different variables, in order to reach the effect of test data diversity.

As an alternative embodiment, the first air pipe 210 includes a connecting pipe 211 communicated with the test tube 120, the bottom of the connecting pipe 211 is connected with a telescopic bellows 212 located below the test bed 110, the bottom of the telescopic bellows 212 is connected with a horizontally arranged feeding pipe 213, the other end of the feeding pipe 213 is connected with a first electromagnetic valve 220, the feeding pipe 131 is connected to the feeding pipe 213, and the bottom of the test bed 110 is provided with a plurality of sets of hydraulic cylinders 290.

In this embodiment, the hydraulic cylinder 290 can drive the test bed 110 and the connecting accessories to move down integrally, so as to facilitate replacement of the quartz tube 122, the hydraulic cylinder 290 can drive the test bed 110 to move up after the replacement is completed, and the telescopic bellows 212 can be adapted to the lifting action of the test bed 110 to extend and retract, thereby meeting the use requirements.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. A deflagration test device is characterized by comprising a test bed, wherein a test tube is arranged at the top of the test bed, the bottom of the test tube is communicated with an air inlet pipeline, and a feeding mechanism is arranged on the air inlet pipeline; wherein,

the feeding mechanism comprises a feeding pipe connected to the air inlet pipeline, a feeding funnel is connected to the top of the feeding pipe, and a control valve is arranged on the feeding pipe.

2. A detonation testing device as claimed in claim 1, wherein the testing tube includes a sealing gasket embedded in the top surface of the testing table, a quartz tube is arranged on the top of the sealing gasket, the air inlet pipe penetrates through the testing table and the sealing gasket and is communicated with the quartz tube, an explosion-proof cover is arranged on the top of the quartz tube, and the compressive strength of the explosion-proof cover is smaller than that of the quartz tube.

3. A detonation test device according to claim 2, wherein a movable plate is hinged to the top surface of the sealing pad and can cover the top orifice of the gas inlet pipe, a limiting spring is arranged on the inner side wall of the quartz tube close to the movable plate, and the limiting spring is horizontally arranged and can be in contact with the movable plate.

4. A deflagration test apparatus as defined in claim 2, wherein said quartz tube is provided with an igniter on an inner wall thereof.

5. A detonation testing device according to claim 1, wherein a plurality of supports surrounding the test tube in an annular array are arranged on the top of the testing table, and a heating device is connected to the tops of the supports and used for heating the test tube.

6. A detonation testing device according to claim 5, characterised in that the heating means comprises a heating jacket, the test tube is located within the heating jacket with a spacing between the outer wall of the test tube and the inner wall of the heating jacket, and the heating jacket is provided with heating tubes on the inner wall.

7. A deflagration test device as claimed in claim 2, characterized in that a clamping mechanism is arranged on the test bench, the clamping mechanism comprises at least two arc sleeves, the arc sleeves are attached to the joint of the outer wall of the quartz tube and the sealing gasket, one side of the arc sleeve, which is far away from the quartz tube, is connected with a telescopic cylinder, and the telescopic cylinder is located at the top of the test bench.

8. A detonation testing device according to claim 1, wherein the inlet pipe includes a first air pipe communicated with the testing pipe, the inlet pipe is connected to the first air pipe, the first air pipe is connected to a first electromagnetic valve, the first electromagnetic valve is connected to a second air pipe, the second air pipe is connected to a third air pipe and a fourth air pipe, the third air pipe and the fourth air pipe are both connected to a second electromagnetic valve, and the second electromagnetic valve is connected to an oxygen storage tank and a combustible gas storage tank.

9. A detonation test device according to claim 8, wherein the first air pipe comprises a connecting pipe communicated with the test tube, the bottom of the connecting pipe is connected with a telescopic bellows below the test bed, the bottom of the telescopic bellows is connected with a horizontally arranged feeding pipe, the other end of the feeding pipe is connected with the first electromagnetic valve, the feeding pipe is connected to the feeding pipe, and a plurality of groups of hydraulic cylinders are arranged at the bottom of the test bed.

10. A deflagration test apparatus as defined in claim 8, wherein said third gas pipe and said fourth gas pipe are each provided with a gas flow meter.