Gas explosion limit measuring device capable of being heated and pressurized

Abstract

The utility model discloses a gas explosion limit measuring device capable of being heated and pressurized, which comprises an equipment shell, a support plate is arranged in the equipment shell, and a gas mixing component for fully mixing gas and an explosion reaction component communicated with an inner cavity of the gas mixing component are arranged on the support plate; through the arrangement of the gas mixing assembly for fully mixing gas and the explosion reaction assembly communicated with the inner cavity of the gas mixing assembly, when combustible gas and air enter the mixing chamber, gas with different components can be contacted and mixed under the action of the flow guide blades, so that the combustion effect of the combustible gas and the air is improved. Meanwhile, the gas can be mixed again through the spiral flow guide pipe, accidental explosion caused by too high local concentration can be avoided, the experiment safety is improved, meanwhile, the fully mixed gas can enable explosion test equipment to exert the maximum efficiency, potential risks in the actual use environment are accurately simulated, and the safety of the experiment is improved. Therefore, reliable data support is provided for product design and production process improvement.

Description

Technical Field

[0001] The present application relates to the field of explosion limit testing, and in particular to a gas explosion limit measuring device capable of increasing temperature and pressure. Background Art

[0002] In the chemical, energy, mining, transportation and other industries, it is often necessary to handle and use various flammable gases and steam. When the mixture of flammable gas and air is within the explosion limit range, it may explode once it encounters a fire source. In order to prevent fire and explosion accidents, explosion limit tests are often performed to determine safe operating conditions and design reasonable safety protection measures. Therefore, explosion limit testers are used;

[0003] The explosion limit tester is a special experimental equipment used to determine the explosion limit concentration range of a mixture of combustible gas or vapor and air under specific conditions. It mainly includes a mixing chamber, an explosion chamber, an ignition system, a pressure measurement system, a temperature control system, a safety protection system, etc. The mixing chamber is used to mix the combustible gas and air in proportion to form test samples of different concentrations.

[0004] During the test, if the combustible gas and air are not mixed evenly, the actual concentration in the local area will deviate from the target value, making the obtained explosion limit range inaccurate, affecting the evaluation of the safety performance of the material. At the same time, if the concentration of the combustible component in the mixed gas is too high or too low, it may cause uncontrollable violent explosion or incomplete combustion during the test, thus posing a great safety risk to the equipment and operators. In order to solve the above problems, a gas explosion limit determination device that can be heated and pressurized is proposed.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0006] In order to solve the explosion limit test problem, the present application provides a gas explosion limit measuring device that can increase temperature and pressurize.

[0007] The present application provides a gas explosion limit determination device capable of heating and pressurizing, which adopts the following technical solution:

[0008] A gas explosion limit determination device capable of heating and pressurizing, comprising a device housing, a support plate provided inside the device housing, a gas mixing component for fully mixing gas and an explosion reaction component communicating with an inner cavity of the gas mixing component provided on the support plate;

[0009] The gas mixing assembly comprises a mixing chamber, a partition plate, a guide vane, and a spiral guide pipe, wherein the mixing chamber is arranged on a support plate, the partition plate, the guide vane, and the spiral guide pipe are all located in the mixing chamber, the partition plate is used to divide the space in the mixing chamber, the guide vane is located above the partition plate, and the spiral guide pipe is located below the partition plate;

[0010] A cabinet door is also rotatably arranged on the equipment shell.

[0011] Preferably, a heating element is also provided at the bottom of the mixing chamber.

[0012] Preferably, the explosion reaction assembly includes a reaction chamber, an igniter, an expansion chamber, and a guide vane. The reaction chamber is arranged on a support plate, the igniter is located at the bottom end of the reaction chamber, the expansion chamber is located on the reaction chamber, and the guide vane is circumferentially arranged on the inner wall of the expansion chamber.

[0013] Preferably, the top and bottom of the expansion chamber are provided with a second partition net and a first partition net respectively.

[0014] Preferably, a buffer is provided below the support plate.

[0015] Preferably, an air inlet pipe is provided at the top of the mixing chamber, an air supply pipe is provided between the mixing chamber and the reaction chamber, an air valve is provided at one end of the air inlet pipe, and a pressure regulating valve is provided at one end of the air supply pipe.

[0016] Preferably, a heat exchanger is fixed to the top of the inner wall of the equipment housing, and the top of the expansion chamber passes through the interior of the heat exchanger.

[0017] Preferably, a filter element is provided at the top of the device housing corresponding to the expansion chamber.

[0018] In summary, compared with the related art, the utility model has the following beneficial effects:

[0019] By arranging a gas mixing component for fully mixing the gas and an explosion reaction component connected to the inner cavity of the gas mixing component in the equipment casing, when the combustible gas and air enter the mixing chamber, the gas is forced to produce strong turbulence and shear motion under the action of the guide vane, so that the gases of different components can contact and mix. At the same time, the mixed gas will be mixed again through the spiral guide tube, so that the gases of different components can be fully mixed. Compared with the related technology, the gases of different components in the mixing chamber are mixed multiple times to ensure that they are fully and evenly mixed, which can effectively avoid accidental explosions caused by excessive local concentrations and improve experimental safety. At the same time, the fully mixed gas can enable the explosion test equipment to exert its maximum efficiency and accurately simulate the potential dangers in the actual use environment, thereby providing reliable data support for product design and production process improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application;

[0021] Figure 2 It is a schematic diagram of the overall opening structure of the embodiment of the application;

[0022] Figure 3 is a schematic diagram of a front cross-sectional structure of an embodiment of the application;

[0023] Figure 4 is a schematic diagram of the cross-sectional structure of a gas mixing assembly of an embodiment of the application;

[0024] Figure 5 It is a schematic diagram of the guide plate structure of an embodiment of the application.

[0025] Explanation of the accompanying reference numerals: 1. Equipment housing; 2. Cabinet door; 3. Support plate; 4. Mixing chamber; 5. Partition plate; 6. Guide vane; 7. Spiral guide tube; 8. Heating element; 9. Air inlet pipe; 10. Buffer; 11. Air pipe; 12. Reaction chamber; 13. Ignitor; 14. Partition net 1; 15. Expansion chamber; 16. Guide vane; 17. Heat exchanger; 18. Partition net 2; 19. Filter; 20. Observation window. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-5 This application is described in further detail.

[0027] The present application embodiment discloses a gas explosion limit measuring device capable of increasing temperature and pressure. Figure 1-5 , a gas explosion limit determination device capable of heating and pressurizing, comprising a device housing 1, a support plate 3 is arranged inside the device housing 1, a gas mixing component for fully mixing the gas and an explosion reaction component communicating with the inner cavity of the gas mixing component are arranged on the support plate 3;

[0028] The gas mixing assembly includes a mixing chamber 4, a partition plate 5, a guide vane 6, and a spiral guide tube 7. The mixing chamber 4 is arranged on the support plate 3. The partition plate 5, the guide vane 6, and the spiral guide tube 7 are all located in the mixing chamber 4. The partition plate 5 is used to divide the space in the mixing chamber 4. The guide vane 6 is located above the partition plate 5, and the spiral guide tube 7 is located below the partition plate 5.

[0029] A cabinet door 2 is also rotatably provided on the equipment housing 1;

[0030] It should be noted that the cabinet door 2 is hinged to the device housing 1, and an observation window 20 is provided on the cabinet door 2;

[0031] It should be further explained that the guide vane 6 is in clearance with the inner wall of the mixing chamber 4, the partition plate 5 is fixed in the mixing chamber 4, one end of the spiral guide tube 7 extends to the partition plate 5, and a ventilation groove is provided on the partition plate 5 corresponding to one end of the spiral guide tube 7;

[0032] By adopting the above technical solution, when the combustible gas and air enter the mixing chamber 4, the gas is forced to produce strong turbulence and shear motion under the action of the guide vane 6, so that the gases of different components can contact and mix. At the same time, the mixed gas will be mixed again through the spiral guide tube 7, so that the gases of different components can be fully mixed.

[0033] Reference Figure 3 , a heating element 8 is also provided at the bottom of the mixing chamber 4;

[0034] It should be noted that the heating element 8 may be a resistance wire heating element: such as an armored heating wire, a ceramic heating rod, etc.;

[0035] By adopting the above technical solution, the heating element 8 heats the gas in the mixing chamber 4, the temperature in the mixing chamber 4 increases, and thus the pressure increases, thereby achieving the effect of increasing the temperature and pressurizing the gas in the mixing chamber 4.

[0036] Reference Figure 2 , 3 5. The explosion reaction assembly includes a reaction chamber 12, an igniter 13, an expansion chamber 15, and a guide vane 16. The reaction chamber 12 is disposed on the support plate 3, the igniter 13 is located at the bottom end of the reaction chamber 12, the expansion chamber 15 is located on the reaction chamber 12, and the guide vane 16 is circumferentially disposed on the inner wall of the expansion chamber 15;

[0037] It should be noted that the guide plate 16 is S-shaped, which can guide the gas to make multiple turns and collisions in the expansion chamber 15, further promoting uniform mixing of the gas and ensuring the full progress of the explosion reaction. At the same time, one side of the guide plate 16 can extend to the outer wall of the expansion chamber 15, which can absorb part of the heat generated by the explosion.

[0038] It should be further explained that the expansion chamber 15 is set to expand first and then tighten. If the expansion chamber 15 is a single expansion design, the explosion shock wave may be reflected when reaching the outlet of the expansion chamber 15. The superposition of the reflected wave and the incident wave may cause a secondary explosion or pressure rebound. The design of expanding and then tightening can change the phase of the reflected wave, which helps to reduce the intensity of the reflected wave and reduce the interference with the test results.

[0039] It should be further explained that the igniter 13 is a SPARK-HF series spark igniter;

[0040] By adopting the above technical solution, when the fully mixed gas enters the reaction chamber 12, while ensuring the safety of the test environment, the igniter 13 is started to ignite the mixed gas to produce an explosion reaction. The impact potential energy generated by the explosion enters the expansion chamber 15 upward, and the impact strength is reduced through the expansion chamber 15.

[0041] Reference Figure 3 , the top and bottom of the expansion chamber 15 are provided with a partition net 2 18 and a partition net 1 14 respectively;

[0042] It should be noted that a gas explosion itself usually does not directly produce solid explosives or debris, but in the actual explosion process, especially in a closed space, if there are other solid substances (such as dust inside the container, powdered combustibles, etc.), these substances may become high-speed flying debris under the action of the explosion shock wave;

[0043] By adopting the above technical solution, the arrangement of the partition net 2 18 and the partition net 1 14 can prevent debris from splashing and improve the safety of the test.

[0044] Reference Figure 2-3 , a buffer member 10 is provided below the support plate 3;

[0045] It should be noted that the buffer 10 is composed of a hydraulic cylinder and a spring;

[0046] By adopting the above technical solution, since a large impact potential energy will be generated when an explosion occurs, the combined effect of the hydraulic cylinder and the spring can play a good buffering role when the explosion occurs.

[0047] Reference Figure 1-3 An air inlet pipe 9 is provided at the top of the mixing chamber 4, an air delivery pipe 11 is provided between the mixing chamber 4 and the reaction chamber 12, an air valve is provided at one end of the air inlet pipe 9, and a pressure regulating valve is provided at one end of the air delivery pipe 11;

[0048] By adopting the above technical solution, the combustible gas and air are introduced into the mixing chamber 4 through the air inlet pipe 9 by controlling the gas valve, and the pressure regulating valve is used to control the mixed gas in the mixing chamber 4 to enter the reaction chamber 12.

[0049] Reference Figure 2 , 3 A heat exchanger 17 is fixed to the top of the inner wall of the equipment housing 1, and the top of the expansion chamber 15 passes through the interior of the heat exchanger 17;

[0050] It should be noted that the heat exchanger 17 may be a finned heat exchanger;

[0051] By adopting the above technical solution, the top of the expansion chamber 15 passes through the interior of the heat exchanger 17, so that the heat generated after the explosion is completed can be discharged after cooling, which can effectively protect the surrounding equipment and structural materials.

[0052] Reference Figure 1-3 , a filter element 19 is provided at the top of the device housing 1 corresponding to the expansion chamber 15;

[0053] It should be noted that the filter element 19 is an AC series activated carbon adsorption filter;

[0054] By adopting the above technical solution, the filter element 19 filters the smoke generated after the explosion and then discharges it, thereby avoiding any impact on the environment.

[0055] The implementation principle of the gas explosion limit determination device that can be heated and pressurized in the embodiment of the present application is as follows: when in use, the air valve is controlled to input air and combustible gas inlet pipe 9 into the mixing chamber 4. Under the action of the guide vane 6, the gases of different components are allowed to contact and mix. The mixed gas will be mixed again through the spiral guide pipe 7, so that the gases of different components can be fully mixed. The heating element 8 is driven to heat the fully mixed gas. As the temperature rises, the pressure in the mixing chamber 4 increases. By controlling the pressure regulating valve on the gas supply pipe 11, an appropriate amount of mixed gas enters the reaction chamber 12. While ensuring the safety of the test environment, the igniter 13 is started to ignite the mixed gas to produce an explosion reaction. The impact potential energy generated by the explosion enters the expansion chamber 15 upward, and the impact strength is reduced through the expansion chamber 15. The heat exchanger 17 is started to cool the hot air generated after the explosion is completed and discharged after filtering through the filter element 19. The test is completed and the relevant data can be recorded.

[0056] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0057] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0058] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gas explosion limit determination device capable of being heated and pressurized, comprising a device housing (1), characterized in that: A support plate (3) is provided inside the device housing (1), and a gas mixing component for fully mixing the gas and an explosion reaction component communicating with the inner cavity of the gas mixing component are provided on the support plate (3); The gas mixing assembly comprises a mixing chamber (4), a partition plate (5), a guide vane (6), and a spiral guide tube (7); the mixing chamber (4) is arranged on a support plate (3); the partition plate (5), the guide vane (6), and the spiral guide tube (7) are all located in the mixing chamber (4); the partition plate (5) is used to divide the space in the mixing chamber (4); the guide vane (6) is located above the partition plate (5); and the spiral guide tube (7) is located below the partition plate (5).

2. A gas explosion limit measuring device capable of heating and pressurizing according to claim 1, characterized in that: A heating element (8) is also provided at the bottom of the mixing chamber (4).

3. The gas explosion limit measuring device capable of heating and pressurizing according to claim 1 is characterized in that: The explosion reaction assembly comprises a reaction chamber (12), an igniter (13), an expansion chamber (15), and a guide vane (16); the reaction chamber (12) is arranged on a support plate (3); the igniter (13) is located at the bottom end of the reaction chamber (12); the expansion chamber (15) is located on the reaction chamber (12); and the guide vane (16) is circumferentially arranged on the inner wall of the expansion chamber (15).

4. A gas explosion limit measuring device capable of increasing temperature and pressure according to claim 3, characterized in that: The top and bottom of the expansion chamber (15) are provided with a second partition net (18) and a first partition net (14) respectively.

5. The gas explosion limit measuring device capable of heating and pressurizing according to claim 1 is characterized in that: A buffer member (10) is provided below the support plate (3).

6. The gas explosion limit measuring device capable of increasing temperature and pressure according to claim 3, characterized in that: An air inlet pipe (9) is arranged at the top of the mixing chamber (4), an air supply pipe (11) is arranged between the mixing chamber (4) and the reaction chamber (12), an air valve is arranged at one end of the air inlet pipe (9), and a pressure regulating valve is arranged at one end of the air supply pipe (11).

7. The gas explosion limit measuring device capable of increasing temperature and pressure according to claim 3, characterized in that: A heat exchanger (17) is fixed to the top of the inner wall of the equipment housing (1), and the top of the expansion chamber (15) passes through the interior of the heat exchanger (17).

8. A gas explosion limit measuring device capable of increasing temperature and pressure according to claim 7, characterized in that: A filter element (19) is provided at the top of the device housing (1) corresponding to the expansion chamber (15).

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