Combustion speed flame tube testing mechanism

Abstract

The utility model discloses a combustion speed flame tube testing mechanism which comprises a combustion tester body, a testing area used for containing a quartz glass testing tube is arranged on the combustion tester body, and the upper end and the lower end of the testing area are respectively provided with a sealing flow guide seat. The sealing flow guide seat at the upper end of the testing area is an upper end sealing flow guide seat used for being in butt joint with the quartz glass testing tube and the gas mixing tank; the sealing flow guide seat at the lower end of the test area adopts a lower-end sealing flow guide seat used for being in butt joint with the quartz glass test tube and the waste water washing filter; and a plugging piece capable of stretching and retracting relative to the lower port of the quartz glass test tube is arranged in the lower end sealing flow guide seat. The utility model discloses a combustion speed flame tube testing mechanism for continuously monitoring flame in a non-contact manner, which is integrated in structure, simple and convenient to operate, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion testers, in particular to a combustion speed flame tube testing mechanism. Background Art

[0002] Flammable gases have the risk of leaking, burning and exploding, so it is necessary to take appropriate measures to prevent disasters. Flammable gases are often transported through pipelines in industrial applications. A non-contact method to continuously monitor flames provides researchers with a safe and reliable research method. Existing products for flame testing are not widely available and are complicated to operate.

[0003] Therefore, there is an urgent need to develop a flame tube testing mechanism that is structurally integrated, easy to operate, safe and reliable, and can continuously monitor the flame's burning speed without contact. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and provides a flame tube testing mechanism which has an integrated structure, is easy to operate, safe and reliable, and can continuously monitor the burning speed of a flame without contact.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a combustion speed flame tube test mechanism, including a combustion tester body, a test area for accommodating a quartz glass test tube is arranged on the combustion tester body, and sealed flow guide seats are respectively arranged at the upper and lower ends of the test area; the sealed flow guide seat at the upper end of the test area is an upper sealed flow guide seat for connecting the quartz glass test tube and the gas mixing tank; the sealed flow guide seat at the lower end of the test area is a lower sealed flow guide seat for connecting the quartz glass test tube and the waste water washing filter; a plugging piece that can be telescopic relative to the lower port of the quartz glass test tube is arranged in the lower sealed flow guide seat.

[0006] In a preferred solution of the utility model, an ignition needle is passed through the center of the blocking member, and the ends of the positive electrode and the negative electrode of the ignition needle pass through the top end of the blocking member.

[0007] In a preferred solution of the utility model, a sealing block capable of extending and retracting relative to the upper port of the quartz glass test tube is arranged in the upper end sealing guide seat.

[0008] Specifically, a driving motor is arranged outside the upper sealing guide seat, a driving shaft of the driving motor is passed through the upper sealing guide seat and is drivingly connected to the blocking block, and a protrusion of the blocking block is slidably embedded in the guide groove of the upper sealing guide seat.

[0009] In a preferred embodiment of the utility model, the lower sealed flow guide seat includes a transfer cavity, one end of the lower sealed flow guide seat is provided with a gas outlet transfer seat connecting the transfer cavity and the lower port of the quartz glass test tube, and one side of the lower sealed flow guide seat is provided with a derivation transfer seat connecting the transfer cavity and the waste water washing filter;

[0010] Or / and, the upper sealed flow guide seat includes a transfer cavity, one end of the upper sealed flow guide seat is provided with an inlet transfer seat connecting the transfer cavity and the upper port of the quartz glass test tube, and one side of the upper sealed flow guide seat is provided with an inlet transfer seat connecting the transfer cavity and the gas mixing tank.

[0011] In a preferred solution of the utility model, the export adapter seat or the import adapter seat is respectively connected to a docking ring seat through a docking drive mechanism, and the docking ring seat is connected to the adapter cavity through a bellows.

[0012] In a preferred solution of the utility model, the blocking member is drivenly disposed in the transition cavity of the upper end sealing guide seat or in the transition cavity of the lower end sealing guide seat.

[0013] In a preferred solution of the utility model, a through hole is provided on the lead-out adapter seat, and the end of the blocking piece is in an inverted cone shape, and the end of the blocking piece can be pressed against and blocked by the through hole.

[0014] In a preferred solution of the utility model, the upper end sealing guide seat or the lower end sealing guide seat is driven and installed in the test area through a displacement slide.

[0015] In a preferred solution of the utility model, a limit seat for supporting and limiting the quartz glass test tube is arranged in the test area, and the limit seat is provided with a plurality of slots extending outward, and the quartz glass test tube can be movably embedded in the slots.

[0016] In a preferred solution of the utility model, an image acquisition device corresponding to the test area is also arranged on one side of the combustion tester body.

[0017] The utility model solves the defects existing in the background technology:

[0018] The utility model discloses a flame tube testing mechanism for continuously monitoring the burning speed of flames, which has an integrated structure, is easy to operate, safe and reliable, and has a non-contact type. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the quartz glass test tube, the upper end sealing guide seat and the lower end sealing guide seat when they are assembled in the preferred embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the lower end sealing guide seat in the preferred embodiment of the utility model;

[0023] In the figure, 1-combustion tester body, 11-limiting seat, 2-gas mixing tank, 3-quartz glass test tube, 31-top flange, 32-bottom flange, 4-waste water washing filter, 5-sealing guide seat, 51-upper sealing guide seat, 511-intake adapter seat, 512-introduction adapter seat, 513-driving motor 1, 514-driving shaft, 515-blocking block;

[0024] 52-lower end sealing guide seat, 520-adapter cavity, 521-air outlet adapter seat, 522-export adapter seat, 523-through hole, 524-docking ring seat, 525-docking drive mechanism, 526-bellows, 53-lifting drive mechanism, 531-driving motor 2, 532-rotating shaft, 533-sealing piece, 534-guide slider, 54-displacement slider, 6-image acquisition device, 7-ignition needle, 71-wire. Implementation

[0025] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Embodiment 1

[0026] like Figure 1-Figure 3As shown, a combustion speed flame tube test mechanism includes a combustion tester body 1, on which a test area for accommodating a quartz glass test tube 3 is provided, and in which a limit seat 11 for supporting and limiting the quartz glass test tube 3 is provided, and on which a plurality of outwardly extending slots are provided, into which the quartz glass test tube 3 can be movably embedded. Sealed flow guide seats 5 are provided at the upper and lower ends of the test area respectively; the sealed flow guide seat 5 at the upper end of the test area is an upper sealed flow guide seat 51 for connecting the quartz glass test tube 3 and the gas mixing tank 2; the sealed flow guide seat 5 at the lower end of the test area adopts a lower sealed flow guide seat 52 for connecting the quartz glass test tube 3 and the waste water washing filter 4. Furthermore, in order to facilitate the placement and removal of the quartz glass test tube 3, the two ends of the quartz glass test tube 3 are respectively fixedly sleeved with a top flange 31 and a bottom flange 32, and the top flange 31 and the bottom flange 32 are respectively abutted against the import adapter 512 and the export adapter 522. The two ends of the quartz glass test tube 3 are respectively abutted against the upper end sealing guide seat 51 and the lower end sealing guide seat 52. Further, the waste water washing filter 4 adopts the water washing filter in the prior art, and the model selection and principle of the waste water washing filter 4 are not listed and repeated here one by one. As long as it can be used for waste water washing filtration.

[0027] Specifically, the upper sealing guide seat 51 or the lower sealing guide seat 52 is driven and installed in the test area by the displacement slide 54. In order to save costs, in this embodiment, the lower sealing guide seat 52 is driven and installed in the test area by the displacement slide 54. The displacement slide 54 adopts the horizontal linear rail drive seat in the prior art, and the specific linear rail drive structure is not described one by one here.

[0028] Specifically, the upper sealed flow guide seat 51 includes a transfer cavity 520, one end of the upper sealed flow guide seat 51 is provided with an inlet transfer seat 511 connecting the transfer cavity 520 and the upper port of the quartz glass test tube 3, and one side of the upper sealed flow guide seat 51 is provided with an introduction transfer seat 512 connecting the transfer cavity 520 and the gas mixing tank 2. Specifically, the introduction transfer seat 512 is driven and connected with a docking ring seat 524 through a docking drive mechanism 525, and the docking ring seat 524 is connected to the transfer cavity 520 through a bellows 526. Furthermore, a blocking block 515 that can be extended and retracted relative to the upper port of the quartz glass test tube 3 is provided in the upper sealed flow guide seat 51. Specifically, a driving motor 513 is arranged outside the upper sealing guide seat 51, a driving shaft 514 of the driving motor 513 is inserted into the upper sealing guide seat 51 and is drivingly connected to the blocking block 515, and the protrusion of the blocking block 515 is slidably embedded in the guide groove of the upper sealing guide seat 51.

[0029] Specifically, the lower sealed flow guide seat 52 includes a transfer chamber 520, one end of the lower sealed flow guide seat 52 is provided with a gas outlet transfer seat 521 connecting the transfer chamber 520 and the lower port of the quartz glass test tube 3, and one side of the lower sealed flow guide seat 52 is provided with a degassing transfer seat 522 connecting the transfer chamber 520 and the waste water washing filter 4. The degassing transfer seat 522 is driven and connected to a docking ring seat 524 through a docking drive mechanism 525, and the docking ring seat 524 is connected to the transfer chamber 520 through a bellows 526.

[0030] More specifically, a plugging member 533 capable of extending and retracting relative to the lower end of the quartz glass test tube 3 is provided in the lower end sealed flow guide seat 52. The plugging member 533 is driven and connected in the lower end sealed flow guide seat 52 by the lifting drive mechanism 53. The lifting drive mechanism 53 includes a second driving motor 531 provided outside the lower end sealed flow guide seat 52, a rotating shaft 532 of the second driving motor 531 movably penetrates into the lower end sealed flow guide seat 52 and is driven and connected to the plugging member 533, and a guide slider 534 on the side of the plugging member 533 is slidably embedded in a slide groove in the lower end sealed flow guide seat 52.

[0031] Furthermore, a through hole 523 is provided on the lead-out adapter 522, and the end of the blocking piece 533 is inverted cone-shaped, and the end of the blocking piece 533 can be pressed against the through hole 523 to block it. Furthermore, an ignition needle 7 is passed through the center of the blocking piece 533, and the ignition needle 7 is driven and connected to the blocking piece 533. The ends of the positive electrode and the negative electrode of the ignition needle 7 pass through the top of the blocking piece 533. One end of the wire 71 is electrically connected to the bottom end of the ignition needle 7, and the other end of the wire 71 is movably passed through the central rotating shaft 532 and connected to an external power source.

[0032] Furthermore, an image acquisition device 6 corresponding to the test area is also provided on one side of the combustion tester body 1. The image acquisition device 6 adopts a camera in the prior art.

[0033] Working principle:

[0034] like Figure 1-Figure 3 As shown, a non-contact flame tube test mechanism for continuously monitoring the burning speed of flames is shown, which is structurally integrated, easy to operate, safe and reliable. By introducing the combustible gas introduced into the gas mixing tank 2 into the vertical quartz glass test tube 3, the quartz glass test tube 3 is connected with the gas mixing tank 2 and the waste water washing filter 4 through the lower end sealing guide seat 52 and the upper end sealing guide seat 51. The combustible gas is introduced by the upper end sealing guide seat 51, and the waste gas or excess air in the quartz glass test tube 3 is discharged by the lower end sealing guide seat 52.

[0035] At the same time, in order to improve the test performance of the quartz glass test tube 3 during the test, a blocking piece 533 and a blocking block 515 for blocking are respectively driven and arranged in the lower end sealing guide seat 52 and the upper end sealing guide seat 51. The quartz glass test tube 3 and the transfer cavity 520 are flexibly connected and docked through the docking ring seat 524 and the bellows 526 driven and connected to the lower end sealing guide seat 52 and the upper end sealing guide seat 51.

[0036] The utility model relates to imaging research on the propagation of premixed flames in tubes, experimental and numerical research on the dynamics of premixed flames in tubes, flame speed, experimental research on the lean combustion limit of mixtures in tubes of different diameters, and the development and propagation of premixed and diffuse flames in restricted channels. It is used to solve the experiment of flame testing after the experimental gas ratio. It is convenient to record experimental data and images. The quartz tube structure optimized for the dynamics of premixed flames in tubes can reduce the change of flame shape caused by acoustic oscillation in the tube. Embodiment 2

[0037] Based on the first embodiment, the combustion velocity flame tube test steps include:

[0038] Step A: Check the combustion velocity flame tube test mechanism before the experiment.

[0039] Step A1: Set the reference ratio of the image acquisition device 6, i.e. the camera. The reference ratio can be any ratio corresponding to the actual flame size (pixel / m or equivalent). Specifically, the image has a known time interval of the camera acquisition frequency (30 Hz to 50 Hz).

[0040] Step A2: Clean the quartz glass test tube 3 by dry gas purging. In this embodiment, the gas used for dry gas purging is air or nitrogen.

[0041] Step A3: Check the gap distance and centering of the positive and negative electrodes of the ignition needle 7;

[0042] Step B: Turn on the power of the combustion rate flame tube test mechanism.

[0043] Step C: The gas mixing tank 2 is filled with different mixture components, and each component should be at a corresponding partial pressure. Each time a new gas is introduced into the gas mixing tank 2, the magnetic stirrer in the gas mixing tank 2 should be turned on at the beginning of the process. The gas mixing tank 2 adopts a gas mixing tank with a magnetic stirrer in the prior art.

[0044] Step D: Both ends of the quartz glass test tube 3 are docked with the docking ring seats 524 of the upper sealing guide seat 51 and the lower sealing guide seat 52. The gas mixing tank 2 flows the mixed gas into the quartz glass test tube 3 from top to bottom through the tube and the upper sealing guide seat 51, flows out from the lower outlet end of the quartz glass test tube 3 and is introduced into the waste water washing filter 4 through the lower sealing guide seat 52 for waste gas filtration. The equivalent volume of the mixed gas introduced in the cycle is at least 13 times the volume in the tube.

[0045] Step E: After the mixed gas is introduced, the upper end sealing guide seat 51 of the upper end of the quartz glass test tube 3 is pressed against the upper port of the quartz glass test tube 3 through the blocking block 515, so that the upper end of the quartz glass test tube 3 is closed, and the lower end of the quartz glass test tube 3 is connected to the lower end sealing guide seat 52 to prevent the gas in the quartz glass test tube 3 from being diluted or the concentration changing.

[0046] Step F: driving the blocking member 533 to introduce the ignition needle 7 into the quartz glass test tube 3, and then igniting. Before ignition, turn on the camera and record the burning image of the flame.

[0047] Step G: After the flame propagation ends, the test ends.

[0048] Working principle:

[0049] like Figure 1-Figure 3 As shown, the linear propagation velocity of the flame is obtained by directly measuring the displacement of the flame front determined by two consecutive images with a known time interval of the camera acquisition frequency (30 Hz to 50 Hz). Using more than one series of images with a mathematical formula, the burning velocity is calculated.

[0050] Based on the ideal embodiment of the utility model, through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the invention. The technical scope of the invention is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A combustion velocity flame tube test mechanism, comprising a combustion tester body (1), wherein the combustion tester body (1) is provided with a test area for receiving a quartz glass test tube (3), and sealing guide seats (5) are respectively provided at the upper and lower ends of the test area; Features: The sealing guide seat (5) at the upper end of the test area is an upper sealing guide seat (51) used for connecting the quartz glass test tube (3) and the gas mixing tank (2); the sealing guide seat (5) at the lower end of the test area is a lower sealing guide seat (52) used for connecting the quartz glass test tube (3) and the waste water washing filter (4); and a plugging piece (533) capable of extending and retracting relative to the lower end of the quartz glass test tube (3) is arranged in the lower sealing guide seat (52).

2. A combustion velocity flame tube testing mechanism according to claim 1, Features: An ignition needle (7) is inserted through the center of the blocking piece (533), and the ends of the positive electrode and the negative electrode of the ignition needle (7) pass through the top of the blocking piece (533).

3. A combustion velocity flame tube testing mechanism according to claim 2, Features: A sealing block (515) is arranged in the upper sealing guide seat (51) and is retractable relative to the upper end of the quartz glass test tube (3).

4. A combustion velocity flame tube testing mechanism according to claim 3, Features: The lower sealed flow guide seat (52) comprises a transfer cavity (520), one end of the lower sealed flow guide seat (52) is provided with a gas outlet transfer seat (521) connecting the transfer cavity (520) and the lower port of the quartz glass test tube (3), and one side of the lower sealed flow guide seat (52) is provided with a gas outlet transfer seat (522) connecting the transfer cavity (520) and the waste water washing filter (4); Or / and, the upper sealed flow guide seat (51) comprises a transfer cavity (520), one end of the upper sealed flow guide seat (51) is provided with a gas inlet transfer seat (511) connecting the transfer cavity (520) and the upper port of the quartz glass test tube (3), and one side of the upper sealed flow guide seat (51) is provided with an inlet transfer seat (512) connecting the transfer cavity (520) and the gas mixing tank (2).

5. A combustion velocity flame tube testing mechanism according to claim 4, Features: The export adapter seat (522) or the import adapter seat (512) is respectively connected to a docking ring seat (524) through a docking drive mechanism (525); the docking ring seat (524) is connected to the adapter cavity (520) through a bellows (526).

6. A combustion velocity flame tube testing mechanism according to claim 5, Features: The blocking member (533) is drivenly disposed in the adapter cavity (520) of the upper end sealing guide seat (51) or in the adapter cavity (520) of the lower end sealing guide seat (52).

7. A combustion velocity flame tube testing mechanism according to claim 6, Features: The export adapter seat (522) is provided with a through hole (523), and the end of the blocking piece (533) is in an inverted cone shape, and the end of the blocking piece (533) can press against and block the through hole (523).

8. A combustion velocity flame tube testing mechanism according to claim 7, Features: The upper end sealing guide seat (51) or the lower end sealing guide seat (52) is driven and installed in the test area by a displacement slide seat (54).

9. A combustion velocity flame tube testing mechanism according to claim 8, Features: A limiting seat (11) for supporting and limiting a quartz glass test tube (3) is provided in the test area, and a plurality of outwardly extending slots are provided on the limiting seat (11), and the quartz glass test tube (3) can be movably embedded in the slots.

10. A combustion velocity flame tube testing mechanism according to claim 9, Features: An image acquisition device (6) corresponding to the test area is also provided on one side of the combustion tester body (1).

Images