Linkage dust removal device for preventing dust explosion

Abstract

The invention discloses a linkage dust removal device for preventing dust explosion. The linkage dust removal device comprises a rack, a dust collection assembly, a shelling assembly and an anti-explosion dust removal assembly. The dust collection fan can be used for blowing air into the dust removal box body to form positive pressure, meanwhile, the air suction assembly continuously sucks air from the dust removal box body to form negative pressure, and positive and negative pressure linkage turbulent flow is formed in the dust removal box body, so that dust-containing air can stably flow, dust is prevented from flying when a filter bag is blown, and the use efficiency of the filter bag is improved; light impurities such as rice hulls in grains can be rapidly separated through the dust collection assembly and the hulling assembly, dust gas purification is achieved through the dust removal assembly, and meanwhile the impurity separation and dust removal functions are achieved. The explosion disc is arranged on the dust removal box body, explosion can be carried out at the specified temperature and pressure, the pressure in the box body can be rapidly released, the dust removal box body is protected against damage, and the explosion-proof dust removal box has the advantages of being simple in structure, free of leakage, high in release capacity and the like.

Description

Technical Field

[0001] The invention relates to the field of grain dust removal and explosion prevention, and in particular to a linked dust removal device for preventing dust explosion. Background Art

[0002] In the process of grain collection, transportation, processing, storage, etc., due to the influence of various environmental factors, various impurities are often mixed into the grain. The inorganic impurities in the grain include dust, sand, mud, stone, bricks and rubble, coal slag, glass slag and metal objects; organic impurities include plant roots, stems, leaves, shells, weed seeds, etc. Impurities have great harm to grain quality and safe production. Therefore, the grain needs to be screened and impurities removed before storage. In the process of using grain screening machines to screen the grain, a large amount of dust and impurities will be generated. The dust-containing gas generated in this process needs to be dedusted and purified by a dust removal device before it can be discharged into the environment to avoid polluting the environment.

[0003] Dust explosion is the phenomenon that the dust particles suspended in the air are fully in contact with the oxygen in the air and the oxidation reaction is completed instantly under specific conditions. A large amount of heat is released in the reaction, which leads to high temperature and high pressure. In the process of grain dust removal, if a spark enters the dust collector, it is easy to ignite the dust in the dust collector and cause an explosion. Therefore, in order to improve the safety of grain screening and dust removal, some dust collectors are also installed with explosion-proof structures. The general dust collector filter cartridge is equipped with a spraying structure at the top. When the filter cartridge or filter bag accumulates to the mobile level, the pulse valve is opened to spray it. However, the spraying efficiency of this method is not high, and the dust will float in the air. The ash will adhere to the filter cartridge or filter bag again, affecting the spraying effect. At the same time, there is currently no linkage dust removal equipment on the market that can effectively prevent dust explosions while filtering and screening impurities in grain. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a linked dust removal device for preventing dust explosion.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention discloses a linkage dust removal device for preventing dust explosion, comprising a frame, a dust collecting assembly is fixedly installed on one side above the frame, the dust collecting assembly comprises a dust collecting box fixed on the frame and a dust collecting fan installed above the dust collecting box; the outlet end of the dust collecting fan is connected to a shelling assembly, the shelling assembly comprises a sedimentation box connected to the dust collecting fan, a shelling pipe connected to the bottom of the sedimentation box and a shell discharge mechanism arranged at the bottom of the shelling pipe; one side of the sedimentation box is connected to an explosion-proof dust removal assembly through a pipeline, and the explosion-proof dust removal assembly comprises a dust collecting box connected to the sedimentation box A dust removal box is provided, one side of which is connected to a bursting disc, a partition is fixedly connected to the middle of the inner cavity of the dust removal box, the partition divides the inner cavity of the dust removal box into a clean air cavity and a filter cavity, a filter bag is movably connected to the partition, a plurality of blowing pipes are arranged above the filter bags, a plurality of jet heads are fixed to the bottom of the blowing pipes, one end of each of the blowing pipes is connected to a solenoid valve, a compressed air cylinder is connected to the bottom of the solenoid valve; both sides of the clean air cavity are connected to exhaust components; the bottom of the filter cavity is connected to a plurality of dust hoppers, and an observation window is provided on the side wall of the dust hopper.

[0006] As a preferred technical solution of the present invention, a dust collection feed port is provided on one side of the dust collecting box, the grain feed port is connected with the outlet of the grain screening machine, a grain discharge port for discharging clean grain is provided at the bottom of the dust collecting box, a dust outlet is provided at the top of the dust collecting box, and the dust outlet is connected with the inlet end at the bottom of the dust collecting fan, so as to extract and separate dust and light impurities such as rice husks from the grain.

[0007] As a preferred technical solution of the present invention, the shell discharge mechanism includes a shelling motor, a spiral pipe and a spiral push rod. The shelling motor is fixed above the frame, the top of the spiral pipe is connected to the bottom of the shelling pipe, the spiral push rod is arranged on the inner side of the spiral pipe and coaxially therewith, a shell impurity outlet is provided at one end of the spiral pipe, and the shelling motor is connected to one end of the spiral push rod through a belt, which is used to drive the spiral push rod to discharge light impurities such as shells in the spiral pipe.

[0008] As a preferred technical solution of the present invention, the bursting piece is square and is fixed to the side wall of the dust removal box by bolts. A square explosion-relief port matching the size of the bursting piece is opened on the side wall of the dust removal box, and the square explosion-relief port is connected to the filter chamber.

[0009] As a preferred technical solution of the present invention, the observation window is circular, a circular observation hole matching the size of the observation window is opened on the side wall of the dust hopper, and the observation window is connected to the inner cavity of the dust hopper.

[0010] As a preferred technical solution of the present invention, the exhaust assembly includes an exhaust motor, an exhaust fan, an exhaust pipe and an air outlet box fixed on the frame, the exhaust fan is connected to the output end of the exhaust motor, the air outlet box is installed above the exhaust fan and connected to the top of the exhaust fan, and the top of the air outlet box is provided with a movable outlet for discharging purified gas, the upper end of the exhaust pipe is connected to the side of the clean air cavity, and the lower end of the exhaust pipe is connected to the inlet of the exhaust fan.

[0011] As a preferred technical solution of the present invention, the solenoid valve is a pulse solenoid valve, which is used to control the compressed air cylinder to provide compressed air to the blowing pipe at a regular interval.

[0012] As a preferred technical solution of the present invention, each of the air jets is disposed directly above the filter bag and is used to blow air into the filter bag to shake off dust attached to the outer surface of the filter bag.

[0013] As a preferred technical solution of the present invention, the outlet position on the side of the sedimentation box is higher than the inlet on the side wall of the dust removal box body, and the pipe connecting the outlet and the inlet is Z-shaped.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The dust collecting fan can be used to blow air into the dust collecting box to form positive pressure. At the same time, the exhaust component continuously extracts air from the dust collecting box to form negative pressure, forming a turbulent flow with positive and negative pressure linkage inside the dust collecting box, so that the dust-laden gas can flow stably. When the filter bag is sprayed, the dust is prevented from flying and adhering to the filter bag again, which improves the use efficiency of the filter bag and reduces the frequency of filter bag replacement; 2. The dust collection component and the hulling component can quickly separate the light impurities such as rice husks from the grain, and the dust removal component can be used to purify the dust gas, while realizing the functions of impurity separation and dust removal; 3. By setting a bursting disc on the dust removal box, it can explode at the specified temperature and pressure, quickly release the pressure inside the box, and protect the dust removal box from damage. This design has the advantages of simple structure, no leakage, and strong release capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 is a side view of the present invention; Figure 4 is a top view of the present invention; Figure 5 It is a cross-sectional structural schematic diagram of the present invention; In the figure: 1. frame; 2. dust collecting assembly; 3. shelling assembly; 4. explosion-proof dust removal assembly; 5. exhaust assembly; 6. dust hopper; 21. dust collecting box; 22. dust collecting fan; 23. grain feeding port; 24. grain discharging port; 25. dust outlet; 31. sedimentation box; 32. shelling pipe; 33. discharge mechanism; 34. shelling motor; 35. spiral pipe; 36. spiral push rod; 41. dust removal box; 42. bursting disc; 43. partition; 44. clean air cavity; 45. filter cavity; 46. filter bag; 47. spray pipe; 48. spray head; 49. solenoid valve; 50. compressed air cylinder; 51. exhaust motor; 52. exhaust fan; 53. exhaust pipe; 54. air outlet box; 61. observation window;. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] In the drawings, the same reference numerals all refer to the same components.

[0018] like Figure 1-5 As shown, the present invention provides a linkage dust removal device for preventing dust explosion, comprising a frame 1, a dust collecting assembly 2 is fixedly installed on one side above the frame 1, the dust collecting assembly 2 comprises a dust collecting box 21 fixed on the frame 1 and a dust collecting fan 22 installed above the dust collecting box 21, and the dust collecting assembly 2 is used to extract light impurities such as rice husks and dust-containing gas in grains to achieve the purpose of impurity removal; The outlet end of the dust collecting fan 22 is connected to a shelling assembly 3, which includes a sedimentation box 31 connected to the dust collecting fan 22, a shelling pipe 32 connected to the bottom of the sedimentation box 31, and a shell discharge mechanism 33 arranged at the bottom of the shelling pipe 32. The shelling assembly 3 is used to separate light impurities such as rice husks in the grain from the dust-containing gas so as to facilitate dust removal in the subsequent process; One side of the sedimentation box 31 is connected to an explosion-proof dust removal component 4 through a pipeline. The explosion-proof dust removal component 4 includes a dust removal box body 41 connected to the sedimentation box 31. One side of the dust removal box body 41 is connected to a bursting disc 42. A partition 43 is fixedly connected to the middle of the inner cavity of the dust removal box body 41. The partition 43 divides the inner cavity of the dust removal box body 41 into a clean air cavity 44 and a filter cavity 45. A filter bag 46 is movably connected to the partition 43. A plurality of blowing pipes 47 are arranged above the filter bag 46. A plurality of jet heads 48 are fixed to the bottom of the blowing pipe 47. One end of each blowing pipe 47 is connected to a solenoid valve 49. A compressed air cylinder 50 is connected below the solenoid valve 49. The explosion-proof dust removal component 4 is used to filter dust-containing gas and prevent dust explosions at the same time. Both sides of the clean air cavity 44 are connected to exhaust components 5, and the exhaust components 5 are used to form a local negative pressure in the clean air cavity 44, thereby improving the dust absorption efficiency; The bottom of the filter chamber 45 is connected to a plurality of dust hoppers 6 , and a viewing window 61 is provided on the side wall of the dust hopper 6 . The dust hopper 6 is used to discharge impurities such as dust after filtering and precipitation.

[0019] The use of the present invention is as follows: 1. Grains containing impurities such as rice husks enter the dust collecting box 21 from the grain inlet 23. After being sucked by the dust collecting fan 22, the light impurities such as rice husks and dust-containing gas in the grain are separated and enter the sedimentation box 31. The clean grains after impurities removal are discharged from the grain outlet 24. 2. After the light impurities such as rice husks and dusty gas are precipitated in the sedimentation box 31, the heavy impurities such as rice husks pass through the hulling pipe 32 and fall into the spiral pipe 35 for discharge; 3. The light dust-containing gas is blown into the dust removal box 41 by the airflow formed by the dust collecting fan 22, and the heavier dust is discharged from the bottom of the dust hopper 6 after settling. The gas purified by the filter bag 46 is discharged through the air outlet box 54.

[0020] For further information, please see the attached Figure 2 A dust collecting inlet 23 is provided on one side of the dust collecting box 21, and the grain feeding inlet 23 is connected with the outlet of the grain screening machine. A grain outlet 24 for discharging clean grain is provided at the bottom of the dust collecting box 21. A dust outlet 25 is provided at the top of the dust collecting box 21, and the dust outlet 25 is connected with the inlet end at the bottom of the dust collecting fan 22, so as to extract and separate dust and light impurities such as rice husks in the grain.

[0021] In this embodiment, after the light impurities such as dust and rice husks in the grain are sucked by the dust collecting fan 22, the impurity-containing gas flows upward under the driving action of wind and enters the sedimentation box 31 connected to the dust collecting fan 22 for sedimentation.

[0022] For further information, please see the attached Figure 5 The shell discharge mechanism 33 includes a shelling motor 34, a spiral pipe 35 and a spiral push rod 36. The base of the shelling motor 34 is fixed on the frame 1. The top of the spiral pipe 35 is connected to the bottom of the shelling pipe 32. The spiral push rod 36 is arranged on the inner side of the spiral pipe 35 and is coaxially arranged therewith. The spiral push rod 36 rotates around the center of the spiral pipe 35 under the drive of the shelling motor 34. A shell impurity outlet is provided at one end of the spiral pipe 35. The shelling motor 34 is connected to one end of the spiral push rod 36 through a belt, which is used to drive the spiral push rod 36 to discharge light impurities such as shells in the spiral pipe 35.

[0023] In this embodiment, after the dust-containing gas is precipitated in the sedimentation box 31, the heavy impurities such as rice husks automatically fall downward along the shelling pipe 32 into the spiral pipe 35 under the action of gravity, and move to the impurity outlet at one end of the spiral pipe 35 under the action of the spiral push rod 36, and then are discharged.

[0024] For further information, please see the attached Figure 2 The bursting disc 42 is square and is fixed to the side wall of the dust removal box 41 by bolts. A square explosion relief port matching the size of the bursting disc 42 is opened on the side wall of the dust removal box 41, and the square explosion relief port is connected to the filter chamber 45.

[0025] In this embodiment, the bursting disc 42 is fixed to the side wall of the dust removal box 41 by bolts. When the temperature and pressure in the filter chamber 45 rise abnormally, the bursting disc 42 can explode at the specified temperature and pressure to quickly release the pressure inside the box, thereby protecting the box from damage. It has the advantages of simple structure, no leakage, and strong release capacity.

[0026] For further information, please see the attached Figure 1 The observation window 61 is circular, and a circular observation hole matching the size of the observation window 61 is provided on the side wall of the dust hopper 6. The observation window 61 is connected to the inner cavity of the dust hopper 6. In this embodiment, a baffle is provided at the bottom of the dust hopper 6. The amount of dust accumulated in the dust hopper 6 can be observed through the observation window 61. When the dust accumulates to a certain amount, the bottom baffle can be opened to discharge the dust in a centralized manner.

[0027] For further information, please see the attached Figure 3 The exhaust assembly 5 includes an exhaust motor 51, an exhaust fan 52, an exhaust pipe 53 and an air outlet box 54 fixed on the frame 1. The exhaust fan 52 is connected to the output end of the exhaust motor 51. The air outlet box 54 is installed above the exhaust fan 52 and connected to the top of the exhaust fan 52. The top of the air outlet box 54 is provided with a movable outlet for discharging purified gas. The upper end of the exhaust pipe 53 is connected to the side of the clean air cavity 44, and the lower end of the exhaust pipe 53 is connected to the inlet of the exhaust fan 52.

[0028] In this embodiment, the exhaust fan 52 continuously draws air to form a negative pressure in the local area of ​​the clean air cavity 44. Combined with the positive pressure generated by the dust collecting fan 22 in the local area of ​​the filter cavity 45, a turbulent flow of positive and negative pressures is formed, so that the dust-containing gas can flow stably from the filter cavity 45 to the clean air cavity 44. When the nozzle 48 blows the filter bag 46, it can effectively prevent dust from flying and avoid adhering to the filter bag again, thereby improving the use efficiency of the filter bag and reducing the frequency of filter bag replacement.

[0029] For further information, please see the attached Figure 3The solenoid valve 49 is a pulse solenoid valve, which is used to control the compressed air cylinder 50 to provide compressed air to the blowing pipe 47 at a regular time. The compressed air is quickly released to the filter bag 46 in a pulse impact manner through the nozzle 48, thereby achieving the effect of pulse dust removal.

[0030] For further information, please see the attached Figure 5 Each nozzle 48 is arranged directly above the filter bag 46, and is used to blow air into the filter bag 46, thereby driving the filter bag 46 to vibrate, so as to shake off the dust attached to the outer surface of the filter bag 46, preventing the dust from adhering to the filter bag and affecting the dust removal effect. The shaken-off dust settles into the dust hopper 6 below under the action of gravity, and is then discharged uniformly.

[0031] Furthermore, the outlet position on the side of the sedimentation box 31 is higher than the inlet on the side wall of the dust removal box body 41, and the pipeline connecting the outlet and the inlet has a Z-shaped shape.

[0032] In this embodiment, after the light impurities such as rice husks are separated by the dust collecting fan 22 and enter the sedimentation box 31, the heavy rice husks fall into the hulling pipe 32, and the light dust is blown into the filter chamber 45 along the Z-shaped pipe by the dust collecting fan 22. The dust hits the Z-shaped pipe wall during the flow, which is conducive to accelerating the sedimentation of the dust, and falling into the dust hopper 6 faster, thereby improving the dust removal efficiency.

[0033] The present invention is a linkage dust removal device for preventing dust explosions. Through the linkage design of dust collection components, shelling components and explosion-proof dust removal components, the dust removal function can be achieved while removing light impurities in grains. In addition, through the structural design of the bursting disc, the function of preventing dust explosions is achieved, and the device has good practicality.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A linked dust removal device for preventing dust explosions, comprising a frame (1), characterized in that: A dust collecting assembly (2) is fixedly mounted on one side above the frame (1), the dust collecting assembly (2) comprising a dust collecting box (21) fixed on the frame (1) and a dust collecting fan (22) mounted above the dust collecting box (21); a shelling assembly (3) is connected to the outlet end of the dust collecting fan (22), the shelling assembly (3) comprising a sedimentation box (31) connected to the dust collecting fan (22), a shelling pipe (32) connected to the bottom of the sedimentation box (31), and a shell discharge mechanism (33) arranged at the bottom of the shelling pipe (32); an explosion-proof dust removal assembly (4) is connected to one side of the sedimentation box (31) through a pipeline, the explosion-proof dust removal assembly (4) comprising a dust removal box body (41) connected to the sedimentation box (31), and one side of the dust removal box body (41) is connected to a A bursting disc (42) is connected, a partition (43) is fixedly connected to the middle of the inner cavity of the dust removal box (41), the partition (43) divides the inner cavity of the dust removal box (41) into a clean air cavity (44) and a filter cavity (45), a filter bag (46) is movably connected to the partition (43), a plurality of blowing pipes (47) are arranged above the filter bag (46), a plurality of jet heads (48) are fixed at the bottom of the blowing pipes (47), one end of each blowing pipe (47) is connected to a solenoid valve (49), and a compressed air cylinder (50) is connected below the solenoid valve (49); both sides of the clean air cavity (44) are connected to exhaust components (5); the bottom of the filter cavity (45) is connected to a plurality of dust hoppers (6), and an observation window (61) is opened on the side wall of the dust hopper (6).

2. A linked dust removal device for preventing dust explosion according to claim 1, characterized in that: A dust collection inlet (23) is provided on one side of the dust collecting box (21), the grain inlet (23) is connected to the outlet of the grain screening machine, a grain outlet (24) for discharging clean grain is provided at the bottom of the dust collecting box (21), a dust outlet (25) is provided at the top of the dust collecting box (21), the dust outlet (25) is connected to the inlet end at the bottom of the dust collecting fan (22), and is used to extract and separate dust and light impurities such as rice husks from the grain.

3. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The shell discharge mechanism (33) comprises a shell removal motor (34), a spiral pipe (35) and a spiral push rod (36). The shell removal motor (34) is fixed above the frame (1). The top of the spiral pipe (35) is connected to the bottom of the shell removal pipe (32). The spiral push rod (36) is arranged inside the spiral pipe (35) and is coaxially arranged therewith. One end of the spiral pipe (35) is provided with a shell impurity outlet. The shell removal motor (34) is connected to one end of the spiral push rod (36) via a belt and is used to drive the spiral push rod (36) to discharge light impurities such as shells in the spiral pipe (35).

4. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The bursting disc (42) is square in shape and is fixed to the side wall of the dust removal box (41) by bolt connection. The side wall of the dust removal box (41) is provided with a square explosion relief opening that matches the size of the bursting disc (42), and the square explosion relief opening is in communication with the filter chamber (45).

5. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The observation window (61) is circular, and a circular observation hole matching the size of the observation window (61) is provided on the side wall of the dust hopper (6), and the observation window (61) is communicated with the inner cavity of the dust hopper (6).

6. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The exhaust assembly (5) comprises an exhaust motor (51) fixed to the frame (1), an exhaust fan (52), an exhaust pipe (53) and an air outlet box (54); the exhaust fan (52) is connected to the output end of the exhaust motor (51); the air outlet box (54) is installed above the exhaust fan (52) and is connected to the top of the exhaust fan (52); a movable outlet for discharging purified gas is provided at the top of the air outlet box (54); the upper end of the exhaust pipe (53) is connected to the side of the clean air cavity (44); and the lower end of the exhaust pipe (53) is connected to the inlet of the exhaust fan (52).

7. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The solenoid valve (49) is a pulse solenoid valve, which is used to control the compressed air cylinder (50) to provide compressed air to the blowing pipe (47) in a timely manner.

8. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: Each of the air jet heads (48) is disposed directly above the filter bag (46) and is used to blow air into the interior of the filter bag (46) to shake off dust attached to the outer surface of the filter bag (46).

9. The linked dust removal device for preventing dust explosion according to claim 1, characterized in that: The outlet on the side of the sedimentation box (31) is located higher than the inlet on the side wall of the dust removal box body (41), and the pipe connecting the outlet and the inlet is in a Z-shape.

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