Dust cloud minimum ignition energy testing device

Abstract

The utility model discloses a dust cloud minimum ignition energy testing device which comprises a device main body, an air pressure adjusting knob is rotatably connected to the surface of one side of the device main body, a Hartmann tube is arranged in the device main body, power supply terminals are inserted into the two sides of the Hartmann tube, an observation window is formed in the device main body, and the observation window is used for observing the condition in the device main body; according to the utility model, a worker pours a sample around the umbrella-shaped spray head, and connects the Hartmann tube with other placement surfaces, so that the Hartmann tube is stably placed, the worker can conveniently connect the power supply terminals with the Hartmann tube, an electrode is generated between the two power supply terminals after a power supply is turned on, and the electrode can generate electric sparks; the electric sparks with certain energy try to ignite the dust cloud, whether the dust cloud burns or not is observed and judged through the observation window, and meanwhile, a worker adjusts the air pressure adjusting knob, so that the air inlet pressure of the air storage chamber is finely adjusted, and the test conditions of the experiment are adjusted for multiple times until the minimum ignition energy for igniting the dust cloud is measured.

Description

Technical Field

[0001] The utility model relates to the technical field of dust clouds, in particular to a dust cloud minimum ignition energy testing device. Background Art

[0002] "Dust cloud" is a cloud formed by dust particles suspended in the air, similar to the cloud formed by water droplets. Compared with dust cloud, dust deposited on the floor forms a dust layer. The minimum ignition temperature of dust cloud is a very important characteristic parameter in dust explosion. It is an important indicator for relative evaluation of dust explosion sensitivity and the basis for selecting explosion-proof electrical equipment.

[0003] The existing dust cloud minimum ignition energy test device can only adjust the dust concentration to produce different experimental data, but other instruments are needed to assist in adjusting the dust concentration. If multiple experimental data are required, the work intensity of the staff will increase, thereby reducing work efficiency.

[0004] Therefore, we propose a dust cloud minimum ignition energy test device. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a dust cloud minimum ignition energy testing device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A dust cloud minimum ignition energy testing device comprises a device body, a surface of one side of the device body is rotatably connected to a gas pressure regulating knob, a Hartmann tube is arranged inside the device body, power supply terminals are plugged into both sides of the Hartmann tube, and an observation window is opened on the device body, and the observation window is used to observe the internal situation of the device body.

[0008] As a further solution of the utility model: the upper end of the Hartmann tube is threadedly screwed with a filter paper gland, the filter paper gland is provided with a filter paper body, and the lower end of the Hartmann tube is provided with a base.

[0009] As a further solution of the utility model: a pressure gauge is fixedly installed on the surface of one side of the device body, and the pressure gauge and the air pressure regulating knob are in the same plane.

[0010] As a further solution of the utility model: a human-machine interface is fixedly installed on one side surface of the device body, and the human-machine interface and the observation window are in the same plane.

[0011] As a further solution of the utility model: a protective cover is fixedly installed on the upper surface of the device body, the protective cover is used to isolate the flame, and an exhaust port is fixedly installed on the upper surface of the protective cover.

[0012] As a further solution of the utility model: a wire inspection window is provided on one side surface of the device body, a power switch is fixedly installed on one side surface of the device body, and the power switch and the wire inspection window are in the same plane.

[0013] As a further solution of the utility model: a power connector is provided on one side surface of the device body, and the power connector and the wire inspection window are in the same plane; an air inlet is opened on one side surface of the device body, and the air inlet and the power connector are in the same plane.

[0014] Compared with the prior art, the utility model provides a dust cloud minimum ignition energy test device, which has the following beneficial effects:

[0015] 1. In the utility model, the staff pours the weighed sample around the umbrella-shaped nozzle, connects the Hartmann tube with other placement surfaces, ensures that the Hartmann tube is placed stably, and facilitates the staff to connect the power supply terminal with the Hartmann tube. When the power is turned on, electrodes are generated between the two power supply terminals, and the electrodes can generate electric sparks. Electric sparks of a certain energy try to ignite the dust cloud, and it is observed through the observation window to determine whether the dust cloud is burning. At the same time, the staff adjusts the air pressure adjustment knob to fine-tune the intake pressure of the air storage chamber, and adjusts the test conditions of the experiment multiple times until the minimum ignition energy for igniting the dust cloud is measured.

[0016] 2. The utility model, by setting up a human-machine interface, enables the staff to set parameters in time, control the functions of charging, unlocking, ignition, and opening the fan, making the overall experiment more convenient and the data more accurate. By setting up a protective cover, it can isolate the flame and avoid experimental hazards. At the same time, an exhaust port is fixedly installed on the protective cover, and a fan is arranged in the exhaust port to discharge the exhaust gas inside the main body of the device.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the dust cloud minimum ignition energy test device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the dust cloud minimum ignition energy test device proposed by the utility model;

[0020] Figure 3This is a schematic top view of the overall structure of the dust cloud minimum ignition energy test device proposed by the utility model;

[0021] Figure 4 This is a plan view of the Hartmann tube connection structure of the dust cloud minimum ignition energy test device proposed by the utility model.

[0022] In the figure: 1. Human-machine interface; 101. Device body; 2. Exhaust port; 3. Protective cover; 4. Filter paper gland; 5. Hartmann tube; 501. Base; 502. Filter paper body; 7. Power supply terminal; 8. Observation window; 9. Wire inspection window; 10. Power connector; 11. Power switch; 12. Air inlet; 13. Air pressure adjustment knob; 14. Pressure gauge. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Example 1

[0026] Dust cloud minimum ignition energy test device, such as Figure 1-Figure 4 As shown, it includes a device body 101, and a gas pressure regulating knob 13 is rotatably connected to the surface of one side of the device body 101. A Hartmann tube 5 is arranged inside the device body 101. Power supply terminals 7 are plugged into both sides of the Hartmann tube 5. An observation window 8 is opened on the device body 101. The observation window 8 is used to observe the internal situation of the device body 101. The staff pours the weighed sample around the umbrella-shaped nozzle, connects the Hartmann tube 5 with other provided placement surfaces, ensures that the Hartmann tube 5 is placed stably, and facilitates the staff to connect the power supply terminal 7 with the Hartmann tube 5. When the power is turned on, electrodes are generated between the two power supply terminals 7, and the electrodes can generate electric sparks. Electric sparks of a certain energy try to ignite the dust cloud. It is observed through the observation window 8 to determine whether the dust cloud is burning. At the same time, the staff adjusts the gas pressure regulating knob 13 to fine-tune the intake pressure of the gas storage chamber, and adjusts the test conditions of the experiment multiple times until the minimum ignition energy for igniting the dust cloud is measured.

[0027] like Figure 1-Figure 4As shown, the upper end of the Hartmann tube 5 is threadedly screwed with a filter paper gland 4, the filter paper gland 4, and the filter paper gland 4 are provided with a filter paper body 502, and the lower end of the Hartmann tube 5 is provided with a base 501. The upper end of the Hartmann tube 5 is threadedly screwed with the filter paper gland 4, the filter paper gland 4, and the filter paper body 502 are provided. The lower end of the Hartmann tube 5 is provided with a base 501. The staff rotates the Hartmann tube 5 counterclockwise for a certain angle and then slowly lifts it up, so that the Hartmann tube 5 leaves the base 501, so that the Hartmann tube 5 can be moved out of the device body 101, rotates the filter paper gland 4 counterclockwise, lifts it up and removes it, and the staff places the filter paper body 502 in the filter paper gland 4, and tightens the filter paper gland 4 with the Hartmann tube 5 in a clockwise direction, and places it vertically in a place where it cannot collide, so that during the test, the filter paper body 502 can filter dust to prevent dust leakage.

[0028] Example 2

[0029] Dust cloud minimum ignition energy test device, such as Figure 1-Figure 3 As shown, a pressure gauge 14 is fixedly installed on one side surface of the device body 101, and the pressure gauge 14 and the air pressure regulating knob 13 are in the same plane. A human-machine interface 1 is fixedly installed on one side surface of the device body 101, and the human-machine interface 1 and the observation window 8 are in the same plane. A protective cover 3 is fixedly installed on the upper surface of the device body 101, and the protective cover 3 is used to isolate the flame. An exhaust port 2 is fixedly installed on the upper surface of the protective cover 3. By setting the pressure gauge 14, the staff can read the pressure of the gas storage chamber in time. By setting the human-machine interface 1, the staff can set parameters in time to control the charging, unlocking, ignition, and opening of the fan function, so that the overall experiment is more convenient and the data is more accurate. By setting the protective cover 3, it can isolate the flame and avoid experimental hazards. At the same time, an exhaust port 2 is fixedly installed on the protective cover 3, and a fan is set in the exhaust port 2 to discharge the exhaust gas inside the device body 101.

[0030] like Figure 1-Figure 2 As shown, a wire inspection window 9 is provided on one side surface of the device body 101, a power switch 11 is fixedly installed on one side surface of the device body 101, and the power switch 11 and the wire inspection window 9 are in the same plane, a power connector 10 is provided on one side surface of the device body 101, and the power connector 10 and the wire inspection window 9 are in the same plane, an air inlet 12 is provided on one side surface of the device body 101, and the air inlet 12 and the power connector 10 are in the same plane. By providing the wire inspection window 9, the staff can timely inspect the power supply terminal 7 to connect the wires, and avoid the power supply terminal 7 from being unable to be energized due to aging of the wires, resulting in delays in the test or inaccurate data. By providing the power switch 11 and the power connector 10, when the power connector 10 is connected, the staff can control the power on and off of the equipment, and by providing the air inlet 12, the air inlet 12 can be connected to compressed air.

[0031] Working principle: The staff pours the weighed sample around the umbrella-shaped nozzle, connects the Hartmann tube 5 with other placement surfaces, ensures that the Hartmann tube 5 is placed stably, and facilitates the staff to connect the power supply terminal 7 with the Hartmann tube 5. When the power is turned on, electrodes will be generated between the two power supply terminals 7, and the electrodes can generate electric sparks. Electric sparks of a certain energy will try to ignite the dust cloud. It is observed through the observation window 8 to determine whether the dust cloud is burning. At the same time, the staff adjusts the air pressure adjustment knob 13 to fine-tune the intake pressure of the air storage chamber, and adjusts the experimental pressure multiple times. The test conditions are set until the minimum ignition energy for igniting the dust cloud is measured. At the same time, the staff rotates the Hartmann tube 5 counterclockwise for a certain angle and then slowly lifts it up, so that the Hartmann tube 5 leaves the base 501, so that the Hartmann tube 5 can be moved out of the device body 101, and the filter paper gland 4 is rotated counterclockwise, lifted up and removed. The staff places the filter paper body 502 in the filter paper gland 4, and tightens the filter paper gland 4 in a clockwise direction with the Hartmann tube 5, and places it vertically in a place where it cannot collide, so that during the test, the filter paper body 502 can filter the dust to prevent dust leakage.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust cloud minimum ignition energy testing device, comprising a device body (101), characterized in that: A gas pressure regulating knob (13) is rotatably connected to a surface of one side of the device body (101); a Hartmann tube (5) is arranged inside the device body (101); power supply terminals (7) are plugged into both sides of the Hartmann tube (5); and an observation window (8) is provided on the device body (101); the observation window (8) is used to observe the internal conditions of the device body (101).

2. The dust cloud minimum ignition energy testing device according to claim 1, characterized in that: The upper end of the Hartmann tube (5) is threadedly connected to a filter paper cover (4), wherein the filter paper cover (4) is provided with a filter paper body (502), and the lower end of the Hartmann tube (5) is provided with a base (501).

3. The dust cloud minimum ignition energy testing device according to claim 1, characterized in that: A pressure gauge (14) is fixedly mounted on one side surface of the device body (101), and the pressure gauge (14) and the air pressure regulating knob (13) are in the same plane.

4. The dust cloud minimum ignition energy testing device according to claim 1, characterized in that: A human-machine interface (1) is fixedly mounted on one side surface of the device body (101), and the human-machine interface (1) and the observation window (8) are in the same plane.

5. The dust cloud minimum ignition energy testing device according to claim 1, characterized in that: A protective cover (3) is fixedly mounted on the upper surface of the device body (101), the protective cover (3) is used to isolate flames, and an exhaust port (2) is fixedly mounted on the upper surface of the protective cover (3).

6. The dust cloud minimum ignition energy testing device according to claim 1, characterized in that: A wire inspection window (9) is provided on one side surface of the device body (101), and a power switch (11) is fixedly installed on one side surface of the device body (101), wherein the power switch (11) and the wire inspection window (9) are in the same plane.

7. The dust cloud minimum ignition energy testing device according to claim 6, characterized in that: A power connector (10) is provided on one side surface of the device body (101), and the power connector (10) and the wire inspection window (9) are in the same plane. An air inlet (12) is provided on one side surface of the device body (101), and the air inlet (12) and the power connector (10) are in the same plane.

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