Dust cloud minimum ignition energy test system and filtration device therefor

Abstract

This disclosure provides a minimum ignition energy testing system for dust clouds and its filtering device. The filtering device, applied to the minimum ignition energy testing system for dust clouds, includes an operating box, a filtering assembly, an air inlet pipe, and an exhaust pipe. The operating box includes a first connecting assembly and an isolation door. The first connecting assembly is sealed to the air inlet pipe. The operating box has an opening, and the isolation door is used to open or seal the opening. The size of the opening is greater than or equal to the size of the filtering assembly. The filtering assembly is disposed inside the operating box and includes a filter element body and a second connecting assembly. The filter element body is fixedly connected to the second connecting assembly. The air inlet end of the second connecting assembly is opposite to the air outlet end of the first connecting assembly, and the second connecting assembly and the first connecting assembly are detachably connected. In this way, combustible dust and flames in the minimum ignition energy testing system for dust clouds can be effectively filtered, preventing them from entering the public exhaust duct and causing risks such as explosions.

Description

Technical Field

[0001] This utility model belongs to the field of energy-saving and environmental protection equipment, specifically relating to a dust cloud minimum ignition energy testing system and its filtration device. Background Technology

[0002] In dust cloud minimum ignition energy testing systems, combustible dust mixed with air forms a combustible gas mixture. If the escaping combustible dust and flame encounter an open flame or a high-temperature object, it can easily ignite, posing a risk of dust explosion. Furthermore, in some existing testing devices, combustible dust and flames can easily escape with the airflow outside the dust cloud minimum ignition energy testing system or enter public exhaust ducts during testing, posing risks such as poisoning of testing personnel and dust explosions. Utility Model Content

[0003] The technical problem to be solved by this disclosure is to overcome the defects in the existing dust cloud minimum ignition energy testing system, where combustible dust and flames can easily enter the public exhaust duct, causing an explosion risk. This disclosure provides a dust cloud minimum ignition energy testing system and its filtering device.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, this disclosure provides a filtration device applied to a minimum ignition energy testing system for dust clouds. The filtration device includes an operating box, a filter assembly, an air inlet pipe, and an exhaust pipe. The operating box is a sealed box. The air inlet pipe is disposed on a first side of the operating box, and the exhaust pipe is disposed on a second side of the operating box. The operating box includes a first connecting assembly and an isolation door. The first connecting assembly is sealed to the air inlet pipe. The operating box has an opening, and the isolation door is used to open or seal the opening. The size of the opening is greater than or equal to the size of the filter assembly. The filter assembly is disposed inside the operating box and includes a filter element body and a second connecting assembly. The filter element body is fixedly connected to the second connecting assembly. The air inlet end of the second connecting assembly is opposite to the air outlet end of the first connecting assembly, and the second connecting assembly is detachably connected to the first connecting assembly.

[0006] Optionally, a sealing gasket is further provided between the first connecting component and the second connecting component.

[0007] Optionally, the filtering device further includes a locking assembly; the locking assembly includes a locking body, a locking shaft, a locking rod, and a locking nut, the locking body including a first locking body and a second locking body; the first locking body and the second locking body are arranged opposite to each other to form a clamp, the clamp being sleeved on the air inlet end of the second connecting assembly and the air outlet end of the first connecting assembly; one end of the first locking body and the second locking body are connected, the other end of the first locking body and the second locking body are provided with a groove, the locking shaft passing through the groove at the other end of the first locking body and fixed thereto. On the first locking body, one end of the locking rod is provided with a through hole, and the locking rod is sleeved on the locking shaft through the through hole. The locking rod rotates about the locking shaft as the rotation axis so that the other end of the locking rod is away from or placed in the groove of the second locking body. When the other end of the locking rod is away from the groove of the first locking body, the other end of the first locking body and the second locking body are opened. When the other end of the locking rod is placed in the groove of the first locking body, the first locking body and the second locking body are locked by the locking nut.

[0008] Optionally, the filter element body includes a perforated plate, a filter screen, a first cover plate, and a second cover plate; the perforated plate is a hollow cylindrical structure with holes, the filter screen is arranged around the outside of the perforated plate, the first cover plate is arranged at one end of the filter element body, and the second cover plate is arranged at the other end of the filter element body; the second cover plate has an opening, and the second connecting assembly is fixedly connected to the second cover plate through the opening.

[0009] Optionally, the filter screen includes a corrugated belt layer filter screen and a flat belt layer filter screen, with the flat belt layer filter screen located between the corrugated belt layer filter screen and the perforated plate.

[0010] Optionally, the pore size of the corrugated belt filter is less than or equal to 20 μm; and / or, the pore size of the flat belt filter is less than or equal to 20 μm.

[0011] Optionally, the control box is made of stainless steel; and / or, the filter assembly is made of stainless steel.

[0012] Optionally, the isolation door is equipped with a locking device for locking the isolation door and the control box.

[0013] Optionally, a sealing ring is provided on the edge of the isolation door that contacts the operating box.

[0014] Secondly, this disclosure provides a minimum ignition energy testing system for dust clouds, including a filter device as described in any of the first aspects of the dust cloud minimum ignition energy testing device, wherein the air inlet pipe of the filter device is connected to the exhaust gas discharge pipe of the dust cloud minimum ignition energy testing device.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0016] The positive and progressive effects of this disclosure are as follows: The exhaust gas generated in the minimum ignition energy testing system for dust clouds is internally filtered through a filtration device. The control box within the filtration device is a sealed structure, preventing combustible dust and flames from escaping from the testing equipment or entering the public exhaust duct, thus avoiding risks such as poisoning of testing personnel or dust explosions. Furthermore, the filter components can be removed from the control box through an isolation door, allowing operators to clean them individually, facilitating the reuse of the filtration device. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a filtration device provided for an exemplary embodiment of this disclosure;

[0018] Figure 2 A schematic diagram of the structure of a locking assembly provided in an exemplary embodiment of this disclosure;

[0019] Figure 3 A schematic diagram of the connection structure between the filter assembly and the air intake pipe provided in an exemplary embodiment of this disclosure;

[0020] Figure 4 A schematic cross-sectional view of a filter screen provided in an exemplary embodiment of this disclosure;

[0021] Explanation of reference numerals in the attached figures

[0022] Control Box 1

[0023] Intake pipe 11

[0024] Exhaust pipe 12

[0025] Isolation door 13

[0026] Locking device 131

[0027] Sealing ring 132

[0028] Filter component 2

[0029] Filter body 20

[0030] First cover plate 201

[0031] Second cover plate 202

[0032] Corrugated belt filter 203

[0033] 204 flat belt filter

[0034] 205 perforated plate

[0035] Locking component 21

[0036] Locking shaft 211

[0037] Locking body 212

[0038] Locking rod 213

[0039] Locking nut 214

[0040] Groove 215

[0041] Second connection component 22

[0042] First connection component 23

[0043] Sealing gasket 24 Detailed Implementation

[0044] The present disclosure is further illustrated below by way of embodiments, but is not intended to limit the scope of the embodiments.

[0045] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0046] Example 1

[0047] Figure 1 A schematic diagram of the structure of a filtering device provided for an exemplary embodiment of this disclosure, as shown below. Figure 1 As shown, the device is used in a dust cloud minimum ignition energy testing system. The filter device includes an operation box 1, a filter assembly 2, an air inlet pipe 11, and an exhaust pipe 12. The operation box 1 is a sealed box, for example, the operation box 1 is a stainless steel sealed cover. The air inlet pipe 11 is located on the first side of the operation box 1, and the exhaust pipe 12 is located on the second side of the operation box 1.

[0048] In one embodiment, the first side and the second side of the control box 1 can be different sides, such as the first side being the bottom of the control box 1 and the second side being the top of the control box 1.

[0049] In one embodiment, the first side and the second side of the control box 1 can be the same side. For example, when the first side and the second side of the control box 1 are the same side, the intake pipe 11 and the exhaust pipe 12 are arranged at different positions on the same side.

[0050] In one embodiment, the first connecting component 23 is sealed to the intake pipe 11 by welding.

[0051] The control box 1 includes a first connecting component 23 and an isolation door 13; the first connecting component 23 is sealed to the air intake pipe 11; the control box 1 is provided with an opening, and the isolation door 13 is used to open or seal the opening, the size of the opening being greater than or equal to the size of the filter component 2.

[0052] In this embodiment, the isolation door 13 is used to open or seal the opening, so the opening size provided on the operation box 1 is greater than or equal to the size of the filter assembly 2, which makes it easy to take the filter assembly 2 out of the operation box 1.

[0053] In one embodiment, the operating box 1 can be made into different sizes and shapes according to the actual application, to adapt to different models of dust cloud minimum ignition energy testing systems.

[0054] The filter assembly 2 is located inside the control box 1. The filter assembly 2 includes a filter element body 20 and a second connecting assembly 22. The filter element body 20 and the second connecting assembly 22 are fixedly connected. The air inlet end of the second connecting assembly 22 is opposite to the air outlet end of the first connecting assembly 23, and the second connecting assembly 22 and the first connecting assembly 23 are detachably connected.

[0055] In one embodiment, the second connecting component 22 and the first connecting component 23 are detachably connected via the locking component 21.

[0056] In the practical application of this embodiment, the filtration device is connected to the exhaust gas inlet pipe and the exhaust gas emission system. The exhaust gas enters the internal space of the filter element body through the inlet pipe, the first connecting component, and the second connecting component. After being filtered by the filter element body, the filtered gas enters the operating box. Then, under the negative pressure of the exhaust pipe, it enters the laboratory's exhaust gas emission system through the exhaust pipe. The combustible dust in the gas is filtered and retained inside the filter element body, preventing it from escaping from the operating box and causing danger.

[0057] In one embodiment, the isolation door 13 is provided with a locking device 131, which is used to lock the isolation door 13 and the control box 1.

[0058] In one embodiment, a sealing ring is provided on the edge of the isolation door that contacts the control box.

[0059] In this embodiment, the air pressure inside the control box is greater than the air pressure outside the control box. The gas may force open the isolation door. The isolation door and the control box are locked by a locking device. A sealing ring is provided on the edge of the control box to further ensure the sealing effect of the control box.

[0060] Figure 2This is a schematic diagram of the locking assembly. Figure 2 As shown, the locking assembly includes a locking body 212, a locking shaft 211, a locking rod 213, and a locking nut 214. The locking body 212 includes a first locking body and a second locking body. For example, the first locking body and the second locking body are as follows: Figure 2 The structure consists of two semi-circular rings; the first locking body and the second locking body are arranged opposite each other to form a clamp, which is fitted onto the air inlet end of the second connecting component 22 and the air outlet end of the first connecting component 23.

[0061] The first locking body and the second locking body are connected at one end, and the other end of the first locking body and the second locking body are provided with a groove 215. A locking shaft 211 passes through the groove 215 at the other end of the first locking body and is fixed to the first locking body.

[0062] One end of the first locking body and the second locking body are fixedly connected by a locking pivot 211. For example, one end of the first locking body and the second locking body is connected by a locking accessory, and the locking accessory is fixedly connected to one end of the first locking body and the second locking body respectively by two locking pivots 211.

[0063] In one embodiment, the locking accessory can also be movably connected to one end of the first locking body and the second locking body via two locking pivots 211, and there is no specific limitation on the connection method of one end of the first locking body and the second locking body.

[0064] One end of the locking rod 213 is provided with a through hole. The locking rod 213 is sleeved on the locking shaft 211 through the through hole, and the locking rod 213 rotates about the locking shaft 211 as the rotation axis so that the other end of the locking rod 213 is away from or placed in the groove 215 of the second locking body. When the other end of the locking rod 213 is away from the groove 215 of the first locking body, the other end of the first locking body and the second locking body are opened. When the other end of the locking rod 213 is placed in the groove 215 of the first locking body, the first locking body and the second locking body are locked by the locking nut 214.

[0065] In this embodiment, when it is necessary to clamp the air inlet end of the second connecting component 22 and the air outlet end of the first connecting component 23, the locking rod 213 is rotated around the locking shaft 211 as the rotation axis so that the other end of the locking rod 213 is placed in the groove 215 of the second locking body, and the first locking body and the second locking body are locked by the locking nut 214. At this time, the first locking body and the second locking body fit tightly, so that the filter component 2 is fixed in the operation box 1.

[0066] In this embodiment, when the filter assembly 2 needs to be removed from the operation box 1, the locking rod 213 is rotated around the locking shaft 211 as the rotation axis, so that the other end of the locking rod 213 is away from the groove 215 of the second locking body, and the air inlet end of the second connecting assembly 22 and the air outlet end of the first connecting assembly 23 are separated, thereby realizing the removal of the filter assembly 2 from the operation box 1.

[0067] In one embodiment, the mating portion between the second connecting component 22 and the first connecting component 23 has a flange-like protrusion, which allows for better and tighter fixing using clamps.

[0068] In this embodiment, the clamp formed by the first locking body and the second locking body being arranged opposite each other is only an exemplary structure, and other fixing forms are also possible, which are not limited here.

[0069] Figure 3 This is a schematic diagram showing the connection between the filter assembly 2 and the air intake pipe 11. Figure 4 This is a cross-sectional view of the filter screen in filter assembly 2, as shown below. Figure 3 and Figure 4 As shown, the filter element body 20 includes a perforated plate 205, a filter screen, a first cover plate 201, and a second cover plate 202; the filter screen includes a corrugated belt layer filter screen 203 and a flat belt layer filter screen 204. The first cover plate 201 is disposed at one end of the filter element body 20, and the second cover plate 202 is disposed at the other end of the filter element body 20; the second cover plate 202 has an opening, and the second connecting assembly 22 is fixedly connected to the second cover plate 202 through the opening.

[0070] The perforated plate 205 is a hollow cylindrical structure with holes. For example, the perforated plate 205 is a cylindrical stainless steel structure. The filter screen is arranged on the outside of the perforated plate 205. The filter screen includes a corrugated belt layer filter screen 203 and a flat belt layer filter screen 204. The flat belt layer filter screen 204 is located between the corrugated belt layer filter screen 203 and the perforated plate 205.

[0071] In one embodiment, the pore size of the corrugated belt filter 203 is less than or equal to 20 μm, and / or the pore size of the flat belt filter 204 is less than or equal to 20 μm.

[0072] In this embodiment, the filter element body is made of stainless steel perforated plate, inner flat belt filter screen, and outer corrugated belt filter screen stacked and wound into a cylindrical shape. The top and bottom of the filter element body are sealed by stainless steel cover plates, wherein the bottom stainless steel cover plate has a reserved opening. The second connecting component is fixedly connected to the bottom stainless steel cover plate through the opening. By setting the aperture of the corrugated belt filter screen 203 and the flat belt filter screen 204 to be less than or equal to 20μm, the exhaust gas entering the filter component 2 is finely filtered. The filtered gas enters the operating box 1 and enters the laboratory public exhaust gas emission pipe through the exhaust pipe 12 of the operating box 1, preventing combustible dust and flames from escaping from the test equipment.

[0073] In one embodiment, such as Figure 3 As shown, a sealing gasket 24 is also provided between the first connecting component 23 and the second connecting component 22.

[0074] In this embodiment, a sealing gasket 24 is also provided between the first connecting component 23 and the second connecting component 22 to further ensure the sealing between the first connecting component 23 and the second connecting component 22.

[0075] In one embodiment, the control box 1 is made of stainless steel; and / or, the filter assembly 2 is made of stainless steel.

[0076] In one embodiment, the sealing gasket and sealing ring are made of corrosion-resistant and non-flammable materials.

[0077] In this embodiment, by setting the operation box 1 and the filter assembly 2 to be made of stainless steel, and the sealing gasket and sealing ring to be made of corrosion-resistant and non-flammable materials, the overall structure of the filter device is corrosion-resistant, can be completely immersed in cleaning liquid or quenching liquid for cleaning, and can be reused after cleaning. It has the characteristics of being not easily damaged and highly durable.

[0078] Example 2

[0079] This embodiment provides a schematic diagram of a minimum ignition energy testing system for dust clouds. The system includes a minimum ignition energy testing device for dust clouds and a filter device from Embodiment 1. The air inlet pipe 11 of the filter device is connected to the exhaust gas emission pipe of the minimum ignition energy testing device for dust clouds, and the exhaust pipe 12 of the filter device is connected to the laboratory's common exhaust gas emission pipe.

[0080] In this embodiment, in actual testing applications, the air inlet pipe 11 of the filter device is connected to the exhaust pipe of the dust cloud minimum ignition energy testing device, and the exhaust pipe 12 of the filter device is connected to the laboratory's common exhaust pipe. The exhaust gas passes through the air inlet pipe and enters the internal space of the filter device. After being filtered by the filter device, the filtered gas enters the operating box. Then, under negative pressure in the exhaust pipe, it passes through the exhaust pipe and finally enters the laboratory's exhaust system. This filters and retains the combustible dust in the gas inside the filter element body, preventing it from escaping from the operating box. This effectively isolates the testing personnel from the testing system and reduces the exposure risk of the testing personnel.

[0081] In one embodiment, the system further includes a glove box-type bag, inside which are placed cleaning items and tightly connected to the control box door 1. After the test is completed, the isolation door 13 of the control box 1 is opened to quench and clean the inside of the control box 1. After the inside of the control box 1 is cleaned, the filter element body 20 and sealing gasket 24 are removed from the control box 1, and the removed filter element body 20, gasket 24, and filtered waste are sealed together in the glove box-type bag and transferred to the cleaning area for cleaning.

[0082] In this embodiment, the filter components can be removed from the operation box through the isolation door, and the operator can clean the filter components separately, making it convenient for the filter device to be reused.

[0083] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A filter device, characterized in that The filter device, which is used in the minimum ignition energy testing system for dust clouds, includes an operating box, a filter assembly, an air inlet pipe, and an exhaust pipe. The operating box is a sealed box. The air inlet pipe is located on the first side of the operating box, and the exhaust pipe is located on the second side of the operating box. The control box includes a first connecting component and an isolation door; the first connecting component is sealed to the air intake pipe; the control box is provided with an opening, and the isolation door is used to open or seal the opening, the size of the opening being greater than or equal to the size of the filter component; The filter assembly is disposed inside the operation box. The filter assembly includes a filter element body and a second connecting assembly. The filter element body is fixedly connected to the second connecting assembly. The air inlet end of the second connecting assembly is opposite to the air outlet end of the first connecting assembly, and the second connecting assembly is detachably connected to the first connecting assembly.

2. The filter device of claim 1, wherein, A sealing gasket is also provided between the first connecting component and the second connecting component.

3. The filter device of claim 1, wherein, The filtration device also includes a locking assembly; The locking assembly includes a locking body, a locking shaft, a locking rod, and a locking nut. The locking body includes a first locking body and a second locking body. The first locking body and the second locking body are arranged opposite each other to form a clamp, and the clamp is sleeved on the air inlet end of the second connecting component and the air outlet end of the first connecting component; The first locking body and the second locking body are connected at one end, and the other end of the first locking body and the second locking body are provided with grooves. The locking shaft passes through the groove at the other end of the first locking body and is fixed to the first locking body. One end of the locking rod is provided with a through hole, and the locking rod is sleeved on the locking shaft through the through hole. The locking rod rotates about the locking shaft as the rotation axis so that the other end of the locking rod is away from or placed in the groove of the second locking body. When the other end of the locking rod is away from the groove of the first locking body, the other end of the first locking body and the second locking body are opened. When the other end of the locking rod is placed in the groove of the first locking body, the first locking body and the second locking body are locked by the locking nut.

4. The filter device of claim 1, wherein, The filter element body includes a perforated plate, a filter screen, a first cover plate, and a second cover plate; The perforated plate is a hollow cylindrical structure with holes. The filter screen is arranged around the outside of the perforated plate. The first cover plate is arranged at one end of the filter element body, and the second cover plate is arranged at the other end of the filter element body. The second cover plate has an opening, and the second connecting assembly is fixedly connected to the second cover plate through the opening.

5. The filter device of claim 4, wherein, The filter screen includes a corrugated belt layer filter screen and a flat belt layer filter screen, with the flat belt layer filter screen located between the corrugated belt layer filter screen and the perforated plate.

6. The filtration device according to claim 5, characterized in that, The pore size of the corrugated belt filter is less than or equal to 20 μm; and / or, the pore size of the flat belt filter is less than or equal to 20 μm.

7. The filter device of claim 1, wherein, The control box is made of stainless steel; and / or, the filter assembly is made of stainless steel.

8. The filter device of claim 1, wherein, The isolation door is equipped with a locking device, which is used to lock the isolation door and the control box.

9. The filter device of claim 1, wherein, A sealing ring is provided on the edge of the isolation door that contacts the control box.

10. A dust cloud minimum ignition energy test system characterized by, The device includes a minimum ignition energy testing device for dust clouds and a filtration device according to any one of claims 1-9, wherein the air inlet pipe of the filtration device is connected to the exhaust gas discharge pipe of the minimum ignition energy testing device for dust clouds.

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