Combustible gas combustion speed testing machine

Abstract

The utility model provides a combustible gas combustion speed testing machine, which comprises a gas mixing device, a purging pipeline, an electromagnetic valve, a testing box body, a testing pipe device, an ignition device, a temperature control device and a waste gas neutralizing device, and has the advantages that the temperature control device is arranged, so that a high-temperature environment can be provided for the periphery of the testing pipe device; the device is used for simulating an actual application scene so as to improve the accuracy of gas combustion speed detection, specifically, a heating pipe in a heating box body heats airflow, and the airflow circularly flows in the heating box body, a connecting box body and a testing box body under the action of a circulating fan, so that the periphery of a testing pipe device is gradually heated to a required temperature; the first thermocouple is used for measuring the real-time temperature so as to control the accuracy of the temperature rise, and after the test is completed, the exhaust fan is started to exhaust the gas from the exhaust pipe, so that the temperature in the test box body is rapidly reduced so as to facilitate the next round of test.

Description

Technical Field

[0001] This utility model relates to the field of gas combustion detection equipment, and in particular to a combustible gas combustion speed testing machine. Background Technology

[0002] Current mainstream gas combustion rate testing devices generally employ a technical architecture combining a sealed chamber and high-speed photography, acquiring combustion rate data by recording the relationship between flame front propagation distance and time. However, these devices are often designed with the ambient temperature set to an ideal standard operating condition (25℃), failing to consider the significant impact of temperature fluctuations on gas combustion dynamics in actual application scenarios. This systematic error caused by temperature differences seriously affects the accurate design and safe operation of the combustion system. To improve the accuracy of gas combustion rate detection, it is necessary to develop a combustible gas combustion rate testing machine. Utility Model Content

[0003] The purpose of this invention is to provide a combustible gas combustion rate testing machine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A combustible gas combustion rate testing machine includes a gas mixing device, a purge pipeline, a solenoid valve, a test chamber, a test tube assembly, an ignition device, a temperature control device, and an exhaust gas neutralization device. The test tube assembly is fixed inside the test chamber, the ignition device is fixed to the lower end of the test tube assembly, and the upper end of the ignition device is connected to the test tube assembly. One end of the purge pipeline is connected to the gas mixing device, and the other end passes through the test chamber and is connected to the lower end of the ignition device. The solenoid valve is installed on the purge pipeline. The exhaust gas neutralization device is fixed outside the test chamber and is connected to the upper end of the test tube assembly through a pipeline. The temperature control device includes a heating chamber and a heating... The test chamber includes a tube, a first thermocouple, a connecting box, a circulating fan, an exhaust fan, and an exhaust pipe. The upper and lower ends of the test chamber are respectively provided with a first ventilation hole and a second ventilation hole. The connecting box is fixed outside the test chamber and is connected to the test chamber through the first ventilation hole. The heating box is fixed outside the test chamber and is connected to the test chamber through the second ventilation hole. The heating tube is fixed inside the heating box. The first thermocouple is fixed inside the test chamber and corresponds to the outside of the test tube device. The upper and lower ends of the circulating fan are connected to the connecting box and the heating box through pipes, respectively. One end of the exhaust pipe is fixed to the connecting box, and the exhaust fan is fixed to the other end of the exhaust pipe.

[0006] Further description of the present invention: The temperature control device also includes an exhaust connector, multiple sets of which are fixedly installed on the exhaust pipe, and the exhaust connector is connected to the test chamber through a pipe.

[0007] Further description of the present invention: The gas mixing device includes a mixing container, a vacuum pump, a pressure sensor, and a second thermocouple. A magnetic stirring assembly is provided inside the mixing container. A purge line is connected to the upper end of the mixing container. The vacuum pump is connected to the mixing container through a pipe. The pressure sensor is fixed on the mixing container and its probe end corresponds to the inside of the mixing container. The second thermocouple is fixed on the mixing container and its probe end corresponds to the inside of the mixing container.

[0008] Further description of this utility model: The test tube device includes a test glass tube, a connecting tube, an upper damping sleeve, a lower damping sleeve, a lifting pressure plate, a lifting screw, and a rotating rod. The test glass tube and the connecting tube are sequentially arranged above the ignition device. The upper and lower ends of the upper damping sleeve are respectively fitted onto the connecting tube and the test glass tube, and the upper and lower ends of the lower damping sleeve are respectively fitted onto the test glass tube and the ignition device. The lifting pressure plate is fixed to the upper end of the connecting tube. The lower end of the lifting screw is rotatably mounted on the lifting pressure plate. The upper end of the lifting screw is threadedly connected to the upper end of the test chamber. The rotating rod passes through the lifting screw in a horizontal direction.

[0009] Further description of the present invention: The waste gas neutralization device includes a gas expansion tank, a waste gas neutralization tank, and a waste gas discharge pipe. Both the gas expansion tank and the waste gas neutralization tank are fixed on the test chamber. The upper end of the gas expansion tank is connected to the connecting pipe through a pipe, and the lower end of the gas expansion tank is connected to the waste gas neutralization pipe through a pipe. The waste gas neutralization tank is used to hold the neutralization solution, and the waste gas discharge pipe is fixed at the upper end of the waste gas neutralization tank.

[0010] The beneficial effects of this utility model are as follows: The gas to be tested is input into the gas mixing device through a pipeline. The gas mixing device mixes the gas. With the solenoid valve open, the gas to be tested passes through the purge pipeline and the ignition device in sequence before entering the test tube device. The temperature control device introduces heated gas into the test chamber to provide a high-temperature environment for the outer periphery of the test tube device. During the test, the gas in the test tube device is ignited by the electrode on the ignition device. The combustion image is recorded by the photographic equipment. The combustion rate of the gas is the ratio of the displacement of the flame front to the time of displacement. The exhaust gas produced by combustion is neutralized by the exhaust gas neutralization device, thereby removing harmful substances from the gas. The advantage of this design lies in its ability to provide a high-temperature environment for the outer periphery of the test tube device by setting a temperature control device, thereby simulating real-world application scenarios and improving the accuracy of gas combustion rate detection. Specifically, the heating tube inside the heating chamber heats the airflow, and under the action of the circulating fan, the airflow circulates within the heating chamber, connecting chamber, and test chamber, gradually raising the outer periphery of the test tube device to the required temperature. The first thermocouple is used to measure the real-time temperature to control the accuracy of the temperature rise. After the test is completed, the exhaust fan is activated to discharge the gas from the exhaust pipe, thereby rapidly cooling the test chamber for the next round of testing. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the present invention;

[0012] Figure 2 This is a structural diagram of the gas mixing device in this utility model;

[0013] Figure 3 This is a structural diagram of the test tube device in this utility model;

[0014] Figure 4 This is a structural diagram of the temperature control device in this utility model (where the first thermocouple is not shown);

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Gas mixing device; 11. Mixing container; 12. Vacuum pump; 13. Pressure sensor; 14. Second thermocouple; 2. Purge line; 3. Solenoid valve; 4. Test chamber; 41. First ventilation hole; 42. Second ventilation hole; 5. Test tube device; 51. Test glass tube; 52. Connecting pipe; 53. Upper damping sleeve; 54. Lower damping sleeve; 55. Lifting pressure plate; 56. Lifting screw; 57. Rotating rod; 6. Ignition device; 7. Temperature control device; 71. Heating chamber; 72. Heating tube; 73. First thermocouple; 74. Connecting chamber; 75. Circulating fan; 76. Exhaust fan; 77. Exhaust pipe; 78. Exhaust connector; 8. Waste gas neutralization device; 81. Gas expansion tank; 82. Waste gas neutralization tank; 83. Waste gas discharge pipe. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] like Figures 1 to 4As shown, a combustible gas combustion rate testing machine includes a gas mixing device 1, a purge line 2, a solenoid valve 3, a test chamber 4, a test tube device 5, an ignition device 6, a temperature control device 7, and an exhaust gas neutralization device 8. The test tube device 5 is fixed inside the test chamber 4, the ignition device 6 is fixed at the lower end of the test tube device 5, and the upper end of the ignition device 6 is connected to the test tube device 5. One end of the purge line 2 is connected to the gas mixing device 1, and the other end passes through the test chamber 4 and is connected to the lower end of the ignition device 6. The solenoid valve 3 is installed on the purge line 2. The exhaust gas neutralization device 8 is fixed outside the test chamber 4 and is connected to the upper end of the test tube device 5 through a pipe. The temperature control device 7 includes a heating chamber 71, a heating tube 72, and a first thermocouple 73. The test chamber 4 is equipped with a connecting box 74, a circulating fan 75, an exhaust fan 76, and an exhaust pipe 77. The upper and lower ends of the test chamber 4 are respectively provided with a first ventilation hole 41 and a second ventilation hole 42. The connecting box 74 is fixed outside the test chamber 4 and is connected to the test chamber 4 through the first ventilation hole 41. The heating box 71 is fixed outside the test chamber 4 and is connected to the test chamber 4 through the second ventilation hole 42. The heating tube 72 is fixed inside the heating box 71. The first thermocouple 73 is fixed inside the test chamber 4 and corresponds to the outside of the test tube device 5. The upper and lower ends of the circulating fan 75 are respectively connected to the connecting box 74 and the heating box 71 through pipes. One end of the exhaust pipe 77 is fixed to the connecting box 74, and the exhaust fan 76 is fixed to the other end of the exhaust pipe 77.

[0019] The gas to be tested is introduced into the gas mixing device 1 through a pipeline. The gas mixing device 1 mixes the gas. With the solenoid valve 3 open, the gas to be tested passes through the purge line 2 and the ignition device 6 in sequence before entering the test tube device 5. The temperature control device 7 introduces heated gas into the test chamber 4 to provide a high-temperature environment for the outer periphery of the test tube device 5. During the test, the gas in the test tube device 5 is ignited by the electrodes on the ignition device 6. The combustion image is recorded by the imaging device. The combustion rate of the gas is the ratio of the displacement of the flame front to the time of displacement. The exhaust gas produced by the combustion is neutralized by the exhaust gas neutralization device 8, thereby removing harmful substances from the gas. The advantage of this design is that by setting a temperature control device 7, a high-temperature environment can be provided for the outer periphery of the test tube device 5 to simulate actual application scenarios and improve the accuracy of gas combustion rate detection. Specifically, the heating tube 72 in the heating chamber 71 heats the airflow, and under the action of the circulating fan 75, the airflow circulates in the heating chamber 71, the connecting chamber 74 and the test chamber 4, so that the outer periphery of the test tube device 5 gradually heats up to the required temperature. The first thermocouple 73 is used to measure the real-time temperature in order to control the accuracy of the temperature rise. After the test is completed, the exhaust fan 76 is started to discharge the gas from the exhaust pipe 77, thereby rapidly cooling the test chamber 4 in order to conduct the next round of tests.

[0020] The temperature control device 7 also includes exhaust connectors 78, with multiple sets of exhaust connectors 78 fixedly installed on the exhaust pipe 77. The exhaust connectors 78 are connected to the test chamber 4 through pipes. By setting multiple sets of exhaust connectors 78 and connecting them to different positions in the test chamber 4 through pipes, the exhaust efficiency after the test can be improved.

[0021] The gas mixing device 1 includes a mixing container 11, a vacuum pump 12, a pressure sensor 13, and a second thermocouple 14. A magnetic stirring assembly is installed inside the mixing container 11. A purge line 2 is connected to the upper end of the mixing container 11. The vacuum pump 12 is connected to the mixing container 11 through a pipe. The pressure sensor 13 is fixed on the mixing container 11 and its probe end corresponds to the inside of the mixing container 11. The second thermocouple 14 is fixed on the mixing container 11 and its probe end corresponds to the inside of the mixing container 11.

[0022] Before the gas to be tested is introduced into the mixing container 11, the mixing container 11 is evacuated by the vacuum pump 12 to remove impurities. Then the gas to be tested is introduced and the gas is mixed evenly by the magnetic stirring assembly. The pressure sensor 13 and the second thermocouple 14 detect the pressure and temperature of the gas, respectively. After the detection is normal, the gas to be tested can be delivered to the test tube device 5.

[0023] The test tube device 5 includes a test glass tube 51, a connecting tube 52, an upper damping sleeve 53, a lower damping sleeve 54, a lifting pressure plate 55, a lifting screw 56, and a rotating rod 57. The test glass tube 51 and the connecting tube 52 are sequentially arranged above the ignition device 6. The upper and lower ends of the upper damping sleeve 53 are respectively fitted onto the connecting tube 52 and the test glass tube 51. The upper and lower ends of the lower damping sleeve 54 are respectively fitted onto the test glass tube 51 and the ignition device 6. The lifting pressure plate 55 is fixed to the upper end of the connecting tube 52. The lower end of the lifting screw 56 is rotatably mounted on the lifting pressure plate 55. The upper end of the lifting screw 56 is threadedly connected to the upper end of the test chamber 4. The rotating rod 57 passes through the lifting screw 56 in a horizontal direction.

[0024] The test tube device 5 of this design is easy to assemble and disassemble. After the test is completed, the lifting screw 56 is driven to rotate by rotating the rod 57. The lifting screw 56 moves upward, thereby driving the lifting pressure plate 55 and the connecting pipe 52 to move upward. When the connecting pipe 52 moves upward to a certain distance, the test glass tube 51, together with the upper damping sleeve 53 and the lower damping sleeve 54, can be taken out for cleaning. Similarly, when installing the next set of test glass tubes 51, the lifting screw 56 is rotated to drive the lifting pressure plate 55 and the connecting pipe 52 to descend, pressing and fixing the test glass tube 51.

[0025] The waste gas neutralization device 8 includes a gas expansion tank 81, a waste gas neutralization tank 82, and a waste gas discharge pipe 83. Both the gas expansion tank 81 and the waste gas neutralization tank 82 are fixed on the test chamber 4. The upper end of the gas expansion tank 81 is connected to the connecting pipe 52 through a pipe, and the lower end of the gas expansion tank 81 is connected to the waste gas neutralization pipe through a pipe. The waste gas neutralization tank 82 is used to hold the neutralization solution, and the waste gas discharge pipe 83 is fixed to the upper end of the waste gas neutralization tank 82.

[0026] The exhaust gas generated after the combustion of the gas enters the gas expansion tank 81 for expansion, and then enters the exhaust gas neutralization tank 82 to react with the neutralization solution, thereby removing harmful substances from the exhaust gas. The remaining gas is discharged through the exhaust gas discharge pipe 83.

[0027] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A combustible gas combustion rate testing machine, characterized in that: The system includes a gas mixing device, a purge pipeline, a solenoid valve, a test chamber, a test tube assembly, an ignition device, a temperature control device, and a waste gas neutralization device. The test tube assembly is fixed inside the test chamber. The ignition device is fixed to the lower end of the test tube assembly, and its upper end is connected to the test tube assembly. One end of the purge pipeline is connected to the gas mixing device, and the other end passes through the test chamber and is connected to the lower end of the ignition device. The solenoid valve is installed on the purge pipeline. The waste gas neutralization device is fixed outside the test chamber and is connected to the upper end of the test tube assembly via a pipeline. The temperature control device includes a heating chamber, a heating tube, a first thermocouple, and a connecting box. The test chamber comprises a body, a circulating fan, an exhaust fan, and an exhaust pipe. The upper and lower ends of the test chamber are respectively provided with a first ventilation hole and a second ventilation hole. The connecting box is fixed outside the test chamber and communicates with the test chamber through the first ventilation hole. The heating box is fixed outside the test chamber and communicates with the test chamber through the second ventilation hole. The heating tube is fixed inside the heating box. The first thermocouple is fixed inside the test chamber and corresponds to the outside of the test tube device. The upper and lower ends of the circulating fan are respectively connected to the connecting box and the heating box through pipes. One end of the exhaust pipe is fixed to the connecting box, and the exhaust fan is fixed to the other end of the exhaust pipe.

2. The combustible gas combustion rate testing machine according to claim 1, characterized in that: The temperature control device also includes an exhaust connector, and multiple sets of exhaust connectors are fixedly installed on the exhaust pipe. The exhaust connectors are connected to the test chamber through a pipe.

3. The combustible gas combustion rate testing machine according to claim 1, characterized in that: The gas mixing device includes a mixing container, a vacuum pump, a pressure sensor, and a second thermocouple. A magnetic stirring assembly is installed inside the mixing container. The purge line is connected to the upper end of the mixing container. The vacuum pump is connected to the mixing container through a pipe. The pressure sensor is fixed on the mixing container with its probe end corresponding to the inside of the mixing container. The second thermocouple is fixed on the mixing container with its probe end corresponding to the inside of the mixing container.

4. A combustible gas combustion rate testing machine according to claim 1, characterized in that: The test tube device includes a test glass tube, a connecting tube, an upper damping sleeve, a lower damping sleeve, a lifting pressure plate, a lifting screw, and a rotating rod. The test glass tube and the connecting tube are sequentially arranged above the ignition device. The upper and lower ends of the upper damping sleeve are respectively fitted onto the connecting tube and the test glass tube, and the upper and lower ends of the lower damping sleeve are respectively fitted onto the test glass tube and the ignition device. The lifting pressure plate is fixed to the upper end of the connecting tube. The lower end of the lifting screw is rotatably mounted on the lifting pressure plate. The upper end of the lifting screw is threadedly connected to the upper end of the test chamber. The rotating rod passes through the lifting screw in a horizontal direction.

5. A combustible gas combustion rate testing machine according to claim 4, characterized in that: The waste gas neutralization device includes a gas expansion tank, a waste gas neutralization tank, and a waste gas discharge pipe. Both the gas expansion tank and the waste gas neutralization tank are fixed on the test chamber. The upper end of the gas expansion tank is connected to the connecting pipe through a pipe, and the lower end of the gas expansion tank is connected to the waste gas neutralization pipe through a pipe. The waste gas neutralization tank is used to hold the neutralization solution, and the waste gas discharge pipe is fixed to the upper end of the waste gas neutralization tank.

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