Anti-explosion weighing device for weighing micron-sized aluminum powder

Abstract

The utility model discloses an anti-explosion weighing device for weighing micron-sized aluminum powder, which comprises a first shell, and the first shell comprises a horizontal section and a vertical section which are communicated with each other; the vertical section is connected with a second shell, and a top plate of the second shell is a weighing platform; a first partition plate is arranged in the second shell and divides an inner cavity of the second shell into a material storage chamber and a filtering chamber, a material barrel is arranged in the material storage chamber, and a feeding opening is formed in the portion, above the material storage chamber, of the weighing table; a plurality of exhaust holes are also formed in the weighing platform; the filter chamber is communicated with the interior of the vertical section, a film-coated anti-explosion filter element is arranged in the filter chamber, a pulse-jet ash removal device is arranged in the vertical section, and a jet pipe of the pulse-jet ash removal device faces the film-coated anti-explosion filter element; a centrifugal fan is further arranged in the vertical section, an air inlet of the centrifugal fan is connected with an air outlet of the film-coated anti-explosion filter element through an air duct, an air outlet pipeline is connected to an air outlet of the centrifugal fan, and the air outlet pipeline penetrates out of the first shell through the top plate of the horizontal section.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing, in particular to weighing micron-level aluminum powder, and in particular to an explosion-proof weighing device for weighing micron-level aluminum powder. Background Art

[0002] In the development and production of explosives, a large amount of micron-sized aluminum powder is needed. Micron-sized aluminum powder has the characteristics of light weight, small particle size and high buoyancy. It is very easy to be released and diffused due to the interference of environmental airflow, resulting in an increase in the concentration of aluminum powder in the use environment, which will not only increase the risk of combustion and explosion accidents, but also increase the risk of workers suffering from aluminum pneumoconiosis.

[0003] At present, in order to control the dispersion of aluminum powder, the weighing operation of aluminum powder mostly adopts a split ventilation dust removal and purification system. The system includes a split exhaust device and a purification device. Its defects are: the system is large in size and the exhaust device is difficult to effectively control the dispersion of aluminum powder, and it is in urgent need of improvement. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an explosion-proof weighing device for weighing micron-level aluminum powder, so as to solve the technical problems in the prior art that the devices used for weighing micron-level aluminum powder are large in size and difficult to effectively control the dispersion of aluminum powder.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An explosion-proof weighing device for weighing micron-level aluminum powder comprises a first shell, wherein the first shell comprises a horizontal section and a vertical section which are connected to each other; a first chamber is arranged in the horizontal section, and a second chamber is arranged in the vertical section;

[0007] The vertical section is connected to a second housing with a top opening, a weighing platform is provided on the opening, and the weighing platform is located directly below the horizontal section;

[0008] A first partition is vertically arranged in the second shell, and the first partition divides the inner cavity of the second shell into a material storage chamber and a filter chamber. A material barrel is arranged in the material storage chamber, and a feeding port is provided on the weighing platform above the material storage chamber; and a plurality of exhaust holes are also provided on the weighing platform;

[0009] The filter chamber is connected to the second chamber, a membrane-coated explosion-proof filter element is arranged in the filter chamber, a pulse jet cleaning device is arranged in the second chamber, and the spray pipe of the pulse jet cleaning device faces the membrane-coated explosion-proof filter element;

[0010] A centrifugal fan is also provided in the second chamber, the air inlet of the centrifugal fan is connected to the air outlet of the coated explosion-proof filter element through an air duct, the air outlet of the centrifugal fan is connected to an air outlet duct, and the air outlet duct passes through the first shell through the horizontal section top plate.

[0011] The utility model also has the following technical features:

[0012] Specifically, a dust collecting tray is further provided below the coated explosion-proof filter element.

[0013] Furthermore, a first door is provided at the front end of the storage chamber, and a second door is provided at the front end of the filter chamber; the first door and the second door are both movably connected to the side wall of the second shell; and an observation window is provided on the second door.

[0014] Furthermore, the diameter of the exhaust hole is 2-5 mm, and the opening rate of the exhaust hole is 10%-25%.

[0015] Furthermore, the bottom of the vertical section and the bottom of the second shell are both provided with a Fuma wheel.

[0016] Furthermore, an explosion-proof lighting lamp is arranged on the bottom plate of the horizontal section.

[0017] Furthermore, the number of the spray pipes of the pulse spray cleaning device is consistent with the number of the coated explosion-proof filter elements.

[0018] Furthermore, the first door is provided with a handle.

[0019] Furthermore, a support plate for placing the barrel is also provided in the storage chamber.

[0020] Furthermore, a wind pressure sensor and a dust concentration sensor are provided on the air outlet side of the coated explosion-proof filter element.

[0021] Compared with the prior art, the utility model has the following technical effects:

[0022] (1) The utility model adopts an integrated exhaust and purification design with a compact structure and a more effective downward suction airflow organization to solve the drawbacks of the existing exhaust system of side suction or upward suction. It makes full use of the characteristic that dust is heavier than air density and uses a downward suction airflow organization to capture dust during its falling process, achieving good dust control and purification effects and low energy consumption.

[0023] (2) The explosion-proof aluminum powder weighing platform provided by the utility model has reasonable airflow organization and realizes the control of aluminum powder dispersion through reasonable airflow control, which can meet the explosion-proof requirements of micron-level aluminum powder weighing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a cross-sectional view of the utility model.

[0026] Figure 3 It is a perspective view of the utility model.

[0027] The meaning of each symbol in the accompanying drawings:

[0028] 1-first shell, 2-second shell, 3-first partition, 4-barrel, 5-film-coated explosion-proof filter element, 6-centrifugal fan, 7-pulse jet cleaning device, 8-dust collecting tray, 9-moving wheel, 10-explosion-proof lighting lamp.

[0029] 11-horizontal segment, 12-vertical segment;

[0030] 21-weighing platform, 22-first box door, 23-second box door, 24-support plate; 211-feeding port, 212-exhaust hole; 221-handle; 231-observation window.

[0031] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] It should be noted that, unless otherwise specified, all components in the present invention, such as the pulse jet cleaning device, the coated explosion-proof filter element, and the motor, are all components known in the prior art.

[0033] The terms "upper", "lower", "front", "rear", etc. used in the present invention to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. "Inside" and "outside" refer to the inside and outside of the contour of the corresponding components, and the above terms cannot be understood as limitations on the present invention.

[0034] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0035] In the present invention, unless otherwise stated, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] Example

[0037] Following the above technical solution, Figures 1 to 3 As shown, this embodiment provides an explosion-proof weighing device for weighing micron-level aluminum powder, including a first shell 1, the first shell 1 is L-shaped as a whole, including a horizontal section 11 and a vertical section 12 connected and arranged; a first chamber is arranged in the horizontal section 11, and a second chamber is arranged in the vertical section 12;

[0038] The vertical section 12 is connected to a second housing 2 with a top opening, and a weighing platform 21 is provided on the opening. The weighing platform 21 is located directly below the horizontal section 11;

[0039] Preferably, the first shell 1 and the second shell 2 are both made of stainless steel plates, the bottom plate of the second shell 2 is connected to the bottom plate of the vertical section 12 and are located on the same plane, the two side plates of the vertical section 12 are welded to the two side plates of the second shell, and all joints are seamlessly welded to reduce the risk of aluminum powder accumulation in the gaps.

[0040] The weighing platform 21 is horizontally arranged and seamlessly welded to the horizontal section 11 ; a left side plate and a right side plate are respectively arranged between the two side plates of the second shell 2 and the two side plates of the horizontal section 11 .

[0041] A first partition 3 is vertically arranged in the second shell 2, and the first partition 3 divides the inner cavity of the second shell 2 into a storage chamber and a filter chamber. A barrel 4 is arranged in the storage chamber, and a feeding port 211 is provided at a position corresponding to the storage chamber on the weighing platform 21. The weighed aluminum powder can be fed into the barrel by means of the feeding port 211; the diameter of the barrel is larger than the diameter of the feeding port 211, and a plurality of exhaust holes 212 are also provided on the weighing platform 21; the weighing platform 21 is used to place a mass scale for weighing the weight of micron-level aluminum powder.

[0042] The front end plate of the vertical section 12, the left plate, the right plate, the weighing platform 21 and the bottom plate of the horizontal section are enclosed to form a working space. The mass scale selected in this embodiment is an electronic scale. The purpose of arranging a plurality of exhaust holes 212 on the weighing platform 21 is to achieve a uniform wind speed of appropriate size and reasonable direction, thereby ensuring the control of aluminum powder dispersion in the working space and effectively reducing the increase in electronic scale weighing error caused by excessive wind speed.

[0043] The filter chamber is connected with the second chamber, and a membrane-coated explosion-proof filter element 5 is arranged in the filter chamber. The membrane-coated explosion-proof filter element 5 is horizontally placed along the width direction of the second shell 2 and is fixed in the second shell 2 by a connecting piece; a pulse jet cleaning device 7 is arranged in the second chamber, and the pulse jet cleaning device 7 is connected to a remote server which can control its start and stop, and the blowing pipe of the pulse jet cleaning device 7 faces the inside of the membrane-coated explosion-proof filter element 5, and the axis of the blowing pipe and the axis of the membrane-coated explosion-proof filter element 5 are located in the same horizontal plane and are arranged perpendicular to each other, and are used for executing a pulse command when excessive aluminum powder adheres to the surface of the membrane-coated explosion-proof filter element 5, and intermittently spraying a large amount of compressed gas into the membrane-coated explosion-proof filter element 5 for multiple times in a short period of time, so as to peel off the excessive aluminum powder from the outer surface of the membrane-coated explosion-proof filter element 5.

[0044] The pulse jet cleaning device 7 used in this embodiment is equipped with a pulse back-blowing head Y-468, and the coated explosion-proof filter element is a chuck coated anti-static dust removal filter element 320, which has anti-static and explosion-proof properties. Other cylindrical and conical filter elements with the same functions can also be selected.

[0045] A centrifugal fan 6 is also provided at the upper part of the second chamber, and the centrifugal fan 6 is connected to a remote server that can control its start and stop. In this embodiment, the centrifugal fan 6 is installed on the front end plate of the vertical section 12, and the air inlet of the centrifugal fan 6 is connected to the air outlet of the coated explosion-proof filter element 5 through the air duct, which is used to suck the filtered air into the second chamber. The air outlet of the centrifugal fan 6 is connected to an air outlet duct, and the air outlet duct passes through the first housing 1 through the top plate of the horizontal section 11. The centrifugal fan 6 has a sufficient rated pressure to overcome the pressure loss generated by the weighing platform 21 and the coated explosion-proof filter element 5, including the friction pressure loss of the inner wall of the box.

[0046] As a preferred solution of this embodiment, a dust collecting tray 8 is further provided below the coated explosion-proof filter element 5. The spray pipe of the gas self-pulse spray cleaning device enters into the coated explosion-proof filter element 5, and the gas is impacted on the inner wall surface of the coated explosion-proof filter element 5 through the spray nozzle, and the coated explosion-proof filter element 5 is back-blown by wind force, and the blown dust falls into the dust collecting tray 8.

[0047] As a preferred solution of this embodiment, a first door 22 is provided at the front end of the storage chamber, and a second door 23 is provided at the front end of the filter chamber; the first door 22 and the second door 23 are both movably connected to the side wall of the second shell 2; and an observation window 231 is provided on the second door 23.

[0048] As a preferred solution of this embodiment, the aperture of the exhaust hole 212 is 2 to 5 mm, and the opening rate of the exhaust hole 212 is 10% to 25%. This arrangement is to ensure the uniformity of the wind speed on the weighing platform 21 and to form a vertically downward uniform airflow with a flow rate of 0.3 to 0.5 m / s.

[0049] As a preferred solution of this embodiment, the bottom of the vertical section 12 and the bottom of the second shell 2 are both provided with a Fuma wheel.

[0050] As a preferred solution of this embodiment, an explosion-proof lighting lamp 10 is arranged on the bottom plate of the horizontal section 11.

[0051] As a preferred solution of this embodiment, the number of the spray pipes of the pulse spray cleaning device 7 is consistent with the number of the membrane-coated explosion-proof filter elements 5 , and each spray pipe corresponds to one membrane-coated explosion-proof filter element 5 .

[0052] As a preferred solution of this embodiment, a handle 221 is provided on the first door 22 .

[0053] As a preferred solution of this embodiment, a support plate 24 for placing the barrel is further provided in the material storage chamber.

[0054] As a preferred solution of this embodiment, a frequency converter is also provided on the centrifugal fan 6 to achieve variable air volume of the explosion-proof fan.

[0055] As a preferred solution of this embodiment, a wind pressure sensor and a dust concentration sensor are arranged on the air outlet side of the coated explosion-proof filter element 5. The wind pressure sensor is used to monitor the terminal pressure of the coated explosion-proof filter element 5 in real time, so as to determine whether the coated explosion-proof filter element 5 has dust overload. The dust concentration sensor is used to monitor the dust filtration efficiency of the coated explosion-proof filter element 5. Both the wind pressure sensor and the dust concentration sensor are connected to the remote server.

[0056] When the utility model is in use:

[0057] Place the electronic scale for weighing the mass of micron-grade aluminum powder on the weighing platform 21, put the micron-grade aluminum powder in the tray of the electronic scale for weighing, turn on the centrifugal fan, and the aluminum powder that escapes during the weighing process falls on the weighing platform 21. The air containing micron-grade aluminum powder enters the filter chamber through the exhaust hole 212, and the micron-grade aluminum powder adheres to the surface of the film-coated explosion-proof filter element 5. The filtered air enters the centrifugal fan 6 through the air duct and is finally discharged through the air outlet duct. Excessive aluminum powder adhered to the surface of the filter element will cause the resistance of the ventilation system to increase. When the pressure value collected by the pressure sensor exceeds the set threshold, start the pulse jet cleaning device 7 to clean the film-coated explosion-proof filter element 5, so that the attached aluminum powder falls into the dust collecting tray 8, and the weighed aluminum powder can be put into the barrel 4.

[0058] After testing, the utility model meets the relevant requirements of WJ2146-2016 on anti-static equipment facilities.

[0059] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0060] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An explosion-proof weighing device for weighing micron-level aluminum powder, comprising a first shell (1), the first shell (1) comprising a horizontal section (11) and a vertical section (12) connected to each other; a first chamber is arranged in the horizontal section (11), and a second chamber is arranged in the vertical section (12), characterized in that: The vertical section (12) is connected to a second housing (2) with a top opening, a weighing platform (21) is provided on the opening, and the weighing platform (21) is located directly below the horizontal section (11); A first partition (3) is vertically arranged in the second shell (2), and the first partition (3) divides the inner cavity of the second shell (2) into a material storage chamber and a filter chamber. A material barrel (4) is arranged in the material storage chamber, and a material feeding port (211) is provided on a weighing platform (21) above the material storage chamber; and a plurality of exhaust holes (212) are also provided on the weighing platform (21); The filter chamber is connected to the second chamber, a membrane-coated explosion-proof filter element (5) is arranged in the filter chamber, a pulse jet cleaning device (7) is arranged in the second chamber, and the spray pipe of the pulse jet cleaning device is directed toward the membrane-coated explosion-proof filter element (5); A centrifugal fan (6) is also provided in the second chamber, the air inlet of the centrifugal fan (6) being connected to the air outlet of the coated explosion-proof filter element (5) via an air duct, the air outlet of the centrifugal fan (6) being connected to an air outlet duct, and the air outlet duct passing through the top plate of the horizontal section (11) and out of the first housing (1).

2. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: A dust collecting tray (8) is also provided below the coated explosion-proof filter element (5).

3. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: A first door (22) is provided at the front end of the material storage chamber, and a second door (23) is provided at the front end of the filter chamber; the first door (22) and the second door (23) are both movably connected to the side wall of the second shell (2); and an observation window (231) is provided on the second door (23).

4. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: The diameter of the exhaust hole (212) is 2 to 5 mm, and the opening rate of the exhaust hole (212) is 10% to 25%.

5. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: The bottom of the vertical section (12) and the bottom of the second shell (2) are both provided with a Fumar wheel (9).

6. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: An explosion-proof lighting lamp (10) is arranged on the bottom plate of the horizontal section (11).

7. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: The number of the spray pipes of the pulse spray cleaning device (7) is consistent with the number of the coated explosion-proof filter elements (5).

8. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 3, characterized in that: The first door (22) is provided with a handle (221).

9. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: The material storage chamber is also provided with a support plate (24) for placing the material barrel.

10. The explosion-proof weighing device for weighing micron-grade aluminum powder according to claim 1, characterized in that: A wind pressure sensor and a dust concentration sensor are arranged on the air outlet side of the coated explosion-proof filter element (5).

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