Automatic dust removal device for steel rail polishing

Abstract

The invention provides an automatic dust removal device for steel rail grinding. The automatic dust removal device comprises a dust air conveying pipeline, a coarse filtering box body, a fine filtering box body, an air suction mechanism and a dust discharging mechanism which are integrally arranged. Wherein the coarse filtering box body and the fine filtering box body are integrally formed and are communicated with each other, the dust air conveying pipeline is arranged on the air inlet side of the coarse filtering box body, and the air suction mechanism is arranged on the air outlet side of the fine filtering box body; the dust discharging mechanism is arranged below the coarse filtering box body and the fine filtering box body and can automatically discharge dust deposited at the bottoms of the coarse filtering box body and the fine filtering box body. The dust collection device has the beneficial effects that through cooperation of the dust air conveying pipeline, the coarse filtering box body, the fine filtering box body and the air suction mechanism which are integrally arranged, automatic purification of dust-containing gas and dust collection can be achieved, and automatic discharging of dust can be achieved through the dust discharging mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of railway track maintenance, and in particular to an automatic dust removal device for rail grinding. Background Art

[0002] Rail grinding vehicles are used to grind the surface of rails, remove rail defects, and restore the rails to their optimal profile. The grinding wheel at the bottom of the rail grinding vehicle will produce dust when grinding rails. The flying dust will pollute the air along the railway and the track bed, so the air generated by the grinding operation needs to be filtered to collect the dust generated by the grinding operation.

[0003] At present, the dust collection device is set close to the grinding wheel. The dust collection device includes a conveying pipeline, a dust collection box and a filter built into the dust collection box. The dust-containing gas enters the dust collection box through the conveying pipeline and is filtered by the filter. The filtered dust falls to the bottom of the dust collection box. Finally, the bottom of the box is manually cleaned to complete the dust collection. However, the existing dust collection device still has some disadvantages, mainly including:

[0004] (1) Existing dust collection devices need to be manually discharged after collecting dust. The dust collected by the device falls into the dust storage box, and the dust is discharged manually by pulling the drawer, or the dust is shoveled out of the box with a shovel to clean the collected dust. This dust discharge process makes the operator labor-intensive, the flying dust is harmful to the health of the operator, and the work efficiency is low.

[0005] (2) Some existing dust collection devices use primary filtration. Due to the high temperature of grinding dust, when high-temperature dust enters the box and is filtered through the filter cartridge or filter bag, the high-temperature dust has the potential to damage the filter cartridge and cause a fire, which will reduce the service life of the filter cartridge or filter bag.

[0006] (3) The existing dust collection device partially uses a cyclone dust collector for filtration. Since the grinding dust has a small particle size, if only a cyclone dust collector is used, the dust with a small particle size cannot settle. The dust concentration in the air discharged after filtration exceeds the standard and cannot meet the environmental emission requirements.

[0007] Therefore, it is necessary to study an automatic dust removal device for rail grinding to solve the above problems or alleviate the impact of the above problems. Summary of the invention

[0008] The present invention provides an automatic dust removal device for rail grinding. The automatic purification of dust-containing gas and dust collection can be achieved through the cooperation of an integrated dust air conveying pipeline, a coarse filter box, a fine filter box and an air suction mechanism. The automatic discharge of dust can be achieved through the dust discharge mechanism, so as to effectively solve the above problems or alleviate the effects of the above problems.

[0009] The automatic dust removal device for rail grinding of the present invention may include an integrated dust air conveying pipeline, a coarse filter box, a fine filter box, an air suction mechanism and a dust exhaust mechanism;

[0010] In which, the coarse filter box and the fine filter box are integrally formed and connected to each other, the dust air conveying duct is arranged on the air inlet side of the coarse filter box, and the suction mechanism is arranged on the air outlet side of the fine filter box; the dust exhaust mechanism is arranged below the coarse filter box and the fine filter box, and can automatically discharge the dust deposited at the bottom of the coarse filter box and the fine filter box.

[0011] In one embodiment, the coarse filtration box adopts a cyclone dust collector, which can perform primary filtration and cooling treatment on the dust-containing gas.

[0012] In one embodiment, the coarse filtration box is divided into an upper cavity, a middle cavity and a lower cavity from top to bottom, the upper cavity is connected to the fine filtration box, the middle cavity is connected to the dust air conveying duct and has multiple cyclone dust collectors evenly distributed therein, and the lower cavity can be connected to the dust exhaust mechanism.

[0013] In one embodiment, the fine filtration box adopts a cartridge dust collector, which can perform secondary filtration on the dust-containing gas.

[0014] In one embodiment, the fine filter box is divided into a dust air cavity and a clean air cavity. The dust air cavity is the space formed between the outer side of the filter cartridge dust collector and the inner wall of the fine filter box, and the dust air cavity is used to accommodate the dust-containing gas before the secondary filtration; the clean air cavity is the space formed between the filter cartridge dust collector and the suction mechanism, and the clean air cavity is used to accommodate the clean air after the secondary filtration.

[0015] In one embodiment, a back-blowing mechanism is provided in the clean air cavity to remove dust attached to the cartridge dust collector.

[0016] In one embodiment, the fine filtration box is provided with a plurality of the cartridge dust collectors distributed in an array, each of the cartridge dust collectors is horizontally arranged in the fine filtration box and is sleeved on a filter element bracket fixed in the fine filtration box, and a cartridge end cover is provided at one end of the cartridge dust collector for sealing, and the other end thereof is connected to the suction mechanism.

[0017] In one embodiment, the dust removal mechanism adopts a screw conveyor, which includes a shell, a spiral conveying blade and a motor. The shell is a closed structure and its top is connected to the bottom of the coarse filter box and the fine filter box. The spiral conveying blade, driven by the motor, can discharge the dust deposited at the bottom of the coarse filter box and the fine filter box through the ash discharge port.

[0018] In one embodiment, the automatic dust removal device further includes a valve mechanism, and the valve mechanism at least includes knife-shaped valves arranged at any two of the bottom of the coarse filter box, the bottom of the fine filter box, and the ash discharge port.

[0019] In one embodiment, the automatic dust removal device further includes a detection mechanism for monitoring the working status of the coarse filtration box and the fine filtration box, and the detection mechanism includes a temperature detector and an air pressure detector.

[0020] The automatic dust removal device for rail grinding provided by the present invention has at least the following beneficial effects compared with the prior art:

[0021] The automatic dust removal device for rail grinding of the present invention generates negative pressure through the air suction mechanism, so that the dust-containing gas is sucked into the dust air conveying pipeline and filtered through the coarse filter box and the fine filter box at two stages, which can realize the automatic purification of the dust-containing gas and dust collection, and then the dust deposited at the bottom of the coarse filter box and the fine filter box can be automatically discharged through the dust discharge mechanism. In this way, the automatic dust removal device can meet the emission requirements of environmental protection through two-stage filtration; the automatic dust removal device automatically discharges dust through the dust discharge mechanism, without the need for manual on-site operation, which can reduce labor intensity, avoid health hazards, and improve work efficiency; and the automatic dust removal device has a high degree of integration and is easy to assemble, which can improve maintenance efficiency and reduce labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0023] Figure 1 is a schematic diagram of a three-dimensional structure of an automatic dust removal device according to an embodiment of the present invention;

[0024] Figure 2 It is a simplified structural schematic diagram of the automatic dust removal device according to an embodiment of the present invention;

[0025] Figure 3 It corresponds to Figure 2 A top view at M in the middle;

[0026] Figure 4 It corresponds to Figure 3 A cross-sectional view of AA;

[0027] Figure 5 It is a structural schematic diagram of knife-shaped valves arranged at two locations on the bottom of the coarse filter box and the bottom of the fine filter box according to an embodiment of the present invention;

[0028] Figure 6 It is a structural schematic diagram of knife-shaped valves arranged at the bottom of the coarse filter box and the ash discharge port in an embodiment of the present invention.

[0029] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0030] Reference numerals:

[0031] 1-dust air conveying pipeline, 101-collection port, 2-coarse filter box, 201-cyclone dust collector, 202-upper cavity, 203-middle cavity, 204-lower cavity, 3-fine filter box, 301-cartridge dust collector, 302-dust air cavity, 303-clean air cavity, 304-backflush mechanism, 305-filter element bracket, 306-filter element, 307-nut, 308-filter cartridge end cover, 309-fixing knob, 4-suction mechanism, 5-screw conveyor, 501-housing, 502-screw conveying blade, 503-motor, 504-ash discharge port, 6-knife-type valve, 7-temperature detector, 8-air pressure detector. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, the automatic dust removal device for rail grinding of the present invention may include an integrated dust air conveying pipeline 1, a coarse filter box 2, a fine filter box 3, an air suction mechanism 4 and a dust exhaust mechanism;

[0034] Among them, the coarse filter box 2 and the fine filter box 3 are integrally formed and connected to each other, the dust air conveying duct 1 is arranged on the air inlet side of the coarse filter box 2, and the suction mechanism 4 is arranged on the air outlet side of the fine filter box 3; the dust exhaust mechanism is arranged below the coarse filter box 2 and the fine filter box 3, and can automatically discharge the dust deposited at the bottom of the coarse filter box 2 and the fine filter box 3.

[0035] Specifically, the coarse filter box 2 and the fine filter box 3 can be two parts separated by an entire box structure, and there is a flow channel between the two for the dust-containing gas to flow from the coarse filter box 2 to the fine filter box 3. The air inlet side of the coarse filter box 2 is connected to the dust air conveying pipeline 1, so that the dust-containing gas can enter the coarse filter box 2 from the dust air conveying pipeline 1. The air outlet side of the fine filter box 3 is connected to the suction mechanism 4, and the suction mechanism 4 is arranged close to the fine filter box 3. The suction mechanism 4 can suck the air in the fine filter box 3, so that negative pressure is formed step by step in the fine filter box 3, the coarse filter box 2 and the dust air conveying pipeline 1, so that the dust-containing gas generated by the rail grinding can be sucked into the dust air conveying pipeline 1 and filtered through the coarse filter box 2 and the fine filter box 3 in turn, and then discharged into the atmosphere through the exhaust port of the suction mechanism 4, so that the automatic purification of the dust-containing gas can be completed. The dust exhaust mechanism is fixedly arranged at the bottom of the coarse filter box 2 and the fine filter box 3. The dust after the dust-laden gas is filtered will be deposited in the box. The dust exhaust mechanism can receive the dust and discharge it into the storage container for subsequent centralized processing.

[0036] It should be noted that the dust air conveying duct 1, the air suction mechanism 4 and the dust exhaust mechanism are all centrally installed close to the box structure formed by the coarse filter box 2 and the fine filter box 3, and the box structure, the air suction mechanism 4 and the dust exhaust mechanism can be fixed by a support frame, and the dust air conveying duct 1 can be fixedly supported by the box structure. This has high integration, is easy to assemble, and can optimize the airflow path between the components and reduce wind resistance, which can improve space utilization and effectively improve dust removal effects.

[0037] In general, the automatic dust removal device generates negative pressure through the suction mechanism 4, so that the dust-containing gas is sucked into the dust air conveying pipeline 1 and filtered through the coarse filter box 2 and the fine filter box 3, which can realize the automatic purification of the dust-containing gas and dust collection, and then the dust deposited at the bottom of the coarse filter box 2 and the fine filter box 3 can be automatically discharged through the dust discharge mechanism. In this way, the automatic dust removal device can meet the emission requirements of environmental protection through two-stage filtration; the automatic dust removal device automatically discharges dust through the dust discharge mechanism, without manual on-site operation, which can reduce labor intensity, avoid health hazards, and improve work efficiency; and the automatic dust removal device has a high degree of integration and is easy to assemble, which can improve maintenance efficiency and reduce labor intensity.

[0038] In one example, the inlet end of the dust air conveying duct 1 includes at least two collecting ports 101. The two collecting ports 101 can collect dust generated by the left and right rails at the same time, or can collect dust generated by a single rail. The collected dust-containing gas is filtered by the coarse filter box 2 and the fine filter box 3, and the dust deposited at the bottom of the box can be removed by the dust exhaust mechanism, and the clean gas after filtering can be discharged into the atmosphere.

[0039] It should be noted that the number of collection ports 101 of the dust air conveying duct 1 can be adjusted according to different collection points, and multiple collection ports 101 will be gathered into a main duct of the dust air conveying duct 1, and the main duct is connected to the coarse filter box 2. Under the action of the suction mechanism 4, negative pressure is formed in the fine filter box 3, the coarse filter box 2 and the dust air conveying duct 1. Under the action of the negative pressure, the dust-laden gas flows and passes through the set path in sequence.

[0040] Furthermore, the air suction mechanism 4 may use a centrifugal fan to suck the air in the fine filtration box 3 to form a negative pressure.

[0041] In one example, the coarse filter box 2 uses a cyclone dust collector 201, which can perform primary filtration and cooling treatment on the dust-containing gas.

[0042] Specifically, the cyclone dust collector 201 causes the dust-containing gas to rotate and flow along the wall of the cyclone barrel through the cyclone, so that the dust is decelerated after colliding with the barrel wall and settles under the action of gravity, and can filter larger dust particles. At the same time, the cyclone effect can accelerate the cooling of high-temperature dust and high-temperature dust-containing gas, and has a good cooling effect. In this way, the temperature of the dust and dust-containing gas after passing through the coarse filtration box 2 is effectively reduced, and after entering the fine filtration box 3, the filter barrel will not be damaged, and there is no hidden danger of causing fire.

[0043] In an example, Figure 2 As shown, the coarse filtration box 2 is divided into an upper cavity 202, an intermediate cavity 203 and a lower cavity 204 from top to bottom. The upper cavity 202 is connected to the fine filtration box 3, the intermediate cavity 203 is connected to the dust air conveying pipeline 1 and has multiple cyclone dust collectors 201 evenly distributed therein, and the lower cavity 204 can be connected to the dust exhaust mechanism.

[0044] Specifically, multiple cyclone dust collectors 201 are evenly spaced in the horizontal direction in the middle cavity 203, with a compact structure, and can effectively filter and separate the dust-containing gas. The dust air delivery pipeline 1 is connected to the middle cavity 203, so that the dust-containing gas can be filtered and separated by the cyclone dust collector 201 after entering the coarse filter box 2, and the larger dust particles will fall and deposit in the lower cavity 204 and can be discharged later by connecting with the dust exhaust mechanism, and the smaller dust particles will rise to the upper cavity 202 with the air and then enter the fine filter box 3.

[0045] In this way, the automatic dust removal device uses the negative pressure provided by the suction mechanism 4 in the device to collect dust-containing gases such as sparks and dust generated by rail grinding. The dust-containing gas enters the dust air conveying pipeline 1, and passes through the coarse filter box 2 and the fine filter box 3 in turn under specific wind speed and wind pressure. In the coarse filter box 2, the dust-containing gas passes through the cyclone dust collector 201 for primary filtration and cooling treatment. Larger dust particles settle to the bottom under the action of gravity, and smaller dust particles enter the fine filter box 3 together with the air.

[0046] In one example, the fine filtration box 3 uses a cartridge dust collector 301, which can perform secondary filtration on the dust-containing gas.

[0047] Specifically, the dust-containing gas passes through the coarse filter box 2 and then enters the fine filter box 3 for secondary filtration. The filter cartridge dust collector 301 can block the passage of smaller dust particles so that they can only be adsorbed on the outside of the filter cartridge. The cleanliness of the filtered gas meets environmental protection requirements and can be directly discharged to the outside.

[0048] In an example, Figure 3 As shown, the fine filtration box 3 is divided into a dust air cavity 302 and a clean air cavity 303. The dust air cavity 302 is the space formed between the outer side of the filter cartridge dust collector 301 and the inner wall of the fine filtration box 3. The dust air cavity 302 is used to accommodate the dust-containing gas before the secondary filtration; the clean air cavity 303 is the space formed between the filter cartridge dust collector 301 and the suction mechanism 4. The clean air cavity 303 is used to accommodate the clean air after the secondary filtration.

[0049] Specifically, the fine filter box 3 is divided into two cavities before and after the secondary filtration, namely the dust air cavity 302 and the clean air cavity 303. The two cavities are separated by the installed filter cartridge. The dust-containing gas flows from the dust air cavity 302 through the filter cartridge dust collector 301 to the clean air cavity 303 to obtain clean air and is discharged to the outside. The specific structure formed by the two cavities can be left-right, up-down, or inside-outside structure.

[0050] In an example, Figure 3As shown, a back-blowing mechanism 304 is provided in the clean air cavity 303 , which can remove dust attached to the cartridge dust collector 301 .

[0051] Specifically, the back-blowing mechanism 304 can be a spray valve, which can back-blow and remove the dust on the cartridge dust collector 301 at a specific air volume and spray frequency. The removed dust falls into the lower part of the dust air cavity 302, that is, the lower part of the fine filter box 3. When cleaning is required, the bottom of the fine filter box 3 is connected to the dust exhaust mechanism and the dust can be removed through the dust exhaust mechanism.

[0052] In an example, Figures 2 to 4 As shown, the fine filtration box 3 is provided with a plurality of cartridge dust collectors 301 distributed in an array, each cartridge dust collector 301 is horizontally arranged in the fine filtration box 3 and is sleeved on a filter element bracket 305 fixed in the fine filtration box 3, and a cartridge end cover 308 is provided at one end of the cartridge dust collector 301 for sealing, and the other end thereof is connected to the suction mechanism 4.

[0053] Specifically, the fine filter box 3 uses a plurality of filter cartridge dust collectors 301 distributed in an array, which can effectively avoid excessive dust adhering to the filter cartridge dust collector 301 during a period of operation to form blockage, so as to ensure the dust-containing gas filtering efficiency, and at the same time can reduce the occupied space and improve the space utilization rate. The filter cartridge dust collector 301 in the fine filter box 3 is horizontally fixedly sleeved on the filter element bracket 305 fixed in the fine filter box 3. One end of the filter cartridge dust collector 301 is provided with a filter cartridge end cover 308 for sealing, and the other end is connected to the suction mechanism 4, so that the dust-containing gas flows from the dust air cavity 302 outside the filter cartridge through the filter cartridge filtration into the inside of the filter cartridge and enters the clean air cavity 303. When maintenance is required, the filter cartridge can be taken out from the side of the filter cartridge end cover 308 without removing the cover of the fine filter box 3, which is convenient for maintenance.

[0054] Furthermore, if Figure 4 As shown, the filter cartridge dust collector 301 may include a filter element bracket 305, a filter element 306, a nut 307, a filter cartridge end cover 308 and a fixing knob 309. The filter element 306 can be fixedly mounted on the filter element bracket 305 by the nut 307, and the filter cartridge end cover 308 is fixed to one end of the filter element 306 and fixed by the fixing knob 309.

[0055] In an example, Figure 2 As shown, the dust removal mechanism adopts a screw conveyor 5, which includes a shell 501, a spiral conveying blade 502 and a motor 503. The shell 501 is a closed structure and its top is connected to the bottom of the coarse filter box 2 and the fine filter box 3. The spiral conveying blade 502, driven by the motor 503, can discharge the dust deposited at the bottom of the coarse filter box 2 and the fine filter box 3 through the ash discharge port 504.

[0056] Specifically, the housing 501 of the screw conveyor 5 is a closed structure, which can prevent dust from escaping and flying out, and a dust discharge port 504 is provided at the bottom of one side thereof, and the dust discharge port 504 can be docked with a storage container. The spiral conveying blade 502 can receive the dust deposited and dropped at the bottom of the coarse filter box 2 and the fine filter box 3 and can transport it to the dust discharge port 504. The motor 503 provides operating power for the spiral conveying blade 502, and the motor 503 can be a reduction motor.

[0057] In an example, Figure 2 , Figure 5 and Figure 6 As shown, the automatic dust removal device also includes a valve mechanism, which at least includes a knife-shaped valve 6 arranged at any two of the bottom of the coarse filter box 2, the bottom of the fine filter box 3 and the ash discharge port 504.

[0058] Specifically, the automatic dust removal device sets a knife-shaped valve 6 at any two of the three locations, namely, the bottom of the coarse filter box 2, the bottom of the fine filter box 3, and the ash discharge port 504, so that the bottom of the coarse filter box 2 and the bottom of the fine filter box 3 are separated during the dust-laden gas purification process, thereby avoiding the bottom connection affecting dust collection and reducing one location for installing a knife-shaped valve 6, thereby saving production costs and speeding up the work efficiency during dust removal operations.

[0059] More specifically, the first case is as follows Figure 2 The bottom of the fine filter box 3 and the dust discharge port 504 are provided with knife-shaped valves 6, and the bottom of the coarse filter box 2 is connected to the dust discharge mechanism; the second case is as follows Figure 6 The bottom of the coarse filter box 2 and the dust discharge port 504 are provided with knife-shaped valves 6, and the bottom of the fine filter box 3 is connected to the dust discharge mechanism; the third situation is as follows Figure 5 The bottom of the coarse filter box 2 and the bottom of the fine filter box 3 are provided with knife-shaped valves 6, and the dust discharge port 504 is connected to the outside. In either case, when the rail is being polished and the automatic dust removal device is collecting dust, the two knife-shaped valves 6 are in a closed state; when dust discharge is required, the two knife-shaped valves 6 are in an open state.

[0060] In this way, through the arrangement and coordination of the coarse filter box 2, the fine filter box 3, the screw conveyor 5 and the knife-shaped valve 6, the screw conveyor 5 is installed below the coarse filter box 2 and the fine filter box 3, and the dust can be collected in the screw conveyor 5 by utilizing gravity. For example, two knife-shaped valves 6 are installed at the dust discharge port 504 at the bottom of the fine filter box 3 and the screw conveyor 5, so as to ensure the isolation of the coarse filter box 2 and the fine filter box 3 from the outside and the isolation between the coarse filter box 2 and the fine filter box 3, and to ensure the normal function of the whole device. At the same time, the corresponding functions and automatic dust discharge can be completed by switching the knife-shaped valve 6. The whole device has a high degree of integration and is suitable for the installation space requirements of the grinding vehicle.

[0061] It should be noted that the knife-shaped valve 6 installed at the bottom of the coarse filtration box 2 or the fine filtration box 3 may include multiple valves. For example, if the bottom of the fine filtration box 3 is provided with two concave bottoms, two knife-shaped valves 6 may be provided accordingly.

[0062] In an example, Figure 1 and Figure 2 As shown, the automatic dust removal device also includes a detection mechanism for monitoring the working conditions in the coarse filter box 2 and the fine filter box 3 , and the detection mechanism includes a temperature detector 7 and an air pressure detector 8 .

[0063] Specifically, the temperature detector 7 can monitor the temperature inside the coarse filter box 2 and the fine filter box 3 to prevent the temperature inside the box from being too high, which may burn the filter cartridge dust collector 301 or cause a fire. The air pressure detector 8 is installed in two different cavities in the fine filter box 3. When the device works normally, the air pressure in the two cavities maintains a certain pressure difference. When the filter cartridge dust collector 301 is damaged or the device leaks air, there is no difference in the air pressure on both sides, which can prompt the operator to check.

[0064] In order to better understand the present invention, the following is an automatic dust removal device for rail grinding (with attached drawings) Figure 2 The working process of the knife-type valve 6 is further described as an example.

[0065] When the grinding machine or milling machine is in operation, the automatic dust removal device starts to work to collect and treat the dust-containing gas generated by grinding. The specific working process of collecting dust in the dust-containing gas includes at least:

[0066] (1) The air suction mechanism 4 starts to work, the knife-shaped valve 6 at the bottom of the fine filter box 3 is closed, the bottom connection between the coarse filter box 2 and the fine filter box 3 is cut off, and the knife-shaped valve 6 of the ash discharge port 504 is closed, so that negative pressure can be formed in the automatic dust removal device.

[0067] (2) Due to negative pressure, dust enters the main pipe of the dust air conveying pipe 1 from the collection port 101, and the main pipe is connected to the middle cavity 203 of the coarse filter box 2. The dust-containing gas enters the cyclone dust collector 201. Due to the rotating airflow, the suspension speed of larger dust particles is reduced and they sink into the screw conveyor 5 (i.e., the dust discharge mechanism) under the action of weight. The lower cavity 204 is connected to the screw conveyor 5. The filtered dust-containing gas enters the upper cavity 202, and the upper cavity 202 is connected to the fine filter box 3. At this point, the first-level filtration of the dust-containing gas is completed, which is also coarse filtration. In this process, larger dust particles can be precipitated, the temperature of the dust-containing gas can be reduced, sparks can be eliminated, and the automatic dust removal device can be effectively protected.

[0068] (3) The dust-laden gas after the primary filtration enters the dust air cavity 302 of the fine filter box 3. Under the action of negative pressure, the dust-laden gas passes through the filter cartridge dust collector 301. The filter cartridge dust collector 301 filters out the dust of a specific particle size. The filtered air enters the clean air cavity 303, and then enters the volute of the suction mechanism 4 connected to the clean air cavity 303, and flows out from the exhaust port to be discharged into the atmosphere. The dust adsorbed on the surface of the filter cartridge can fall from the surface of the filter cartridge under the action of the back-blowing air of the back-blowing mechanism 304 (blowing valve) and fall into the lower part of the fine filter box 3.

[0069] When the grinding machine or milling machine is under maintenance, the automatic dust removal device can perform dust removal operations to remove the dust collected and stored in the box. The specific dust removal process includes at least:

[0070] (1) Open the knife-shaped valve 6 at the bottom of the fine filter box 3. At this time, the dust air cavity 302 of the fine filter box 3 is connected with the screw conveyor 5, and the dust falls into the screw conveyor 5 under the action of gravity.

[0071] (2) Open the knife-shaped valve 6 of the ash discharge port 504, and the screw conveyor 5 is now connected to the outside.

[0072] (3) Turn on the motor 503 of the screw conveyor 5. The screw conveying blades 502 rotate under the drive of the motor 503, and the dust in the coarse filter box 2 and the fine filter box 3 are transported to the knife-shaped valve 6 of the ash discharge port 504. Under the combined action of gravity and the screw conveying blades 502, the dust is discharged from the ash discharge port 504. The dust is collected in a container at the ash discharge port 504 and processed centrally, thereby achieving the purpose of removing the dust.

[0073] The automatic dust removal device needs to regularly maintain the cartridge dust collector 301 inside the fine filter box 3. The specific working process at least includes:

[0074] Loosen the fixing knob 309 on the filter cartridge end cover 308 and remove the filter cartridge end cover 308. At this time, the filter element bracket 305 and the filter element 306 are exposed. Since the filter element 306 is fixed to the filter element bracket 305 by the nut 307, the filter element 306 can be removed by removing the nut 307 for cleaning or replacement. The whole process is convenient and quick.

[0075] In summary, the beneficial effects of the automatic dust removal device for rail grinding of the present invention at least include:

[0076] (1) The automatic dust removal device of the present invention is composed of a coarse filter box and a fine filter box, which can increase the service life of the device, reduce the temperature of high-temperature dust-containing gas during circulation, and improve the safety of the device.

[0077] (2) The automatic dust removal device of the present invention adopts a modular installation method of a filter cartridge dust collector in the fine filtration box, which is easy to disassemble and has good maintainability, and can minimize the maintenance workload.

[0078] (3) The dust in the coarse filter box and the fine filter box in the automatic dust removal device of the present invention can be discharged through a set of screw conveyors, and at the same time, a corresponding valve mechanism is provided, which has a high degree of integration and automation, can improve the efficiency of rail maintenance, and reduce labor intensity.

[0079] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic dust removal device for rail grinding, characterized in that: The automatic dust removal device comprises an integrated dust air conveying pipeline, a coarse filter box, a fine filter box, an air suction mechanism and a dust exhaust mechanism; In which, the coarse filter box and the fine filter box are integrally formed and connected to each other, the dust air conveying duct is arranged on the air inlet side of the coarse filter box, and the suction mechanism is arranged on the air outlet side of the fine filter box; the dust exhaust mechanism is arranged below the coarse filter box and the fine filter box, and can automatically discharge the dust deposited at the bottom of the coarse filter box and the fine filter box.

2. The automatic dust removal device for rail grinding according to claim 1, characterized in that: The coarse filtering box adopts a cyclone dust collector, which can perform primary filtering and cooling treatment on the dust-containing gas.

3. The automatic dust removal device for rail grinding according to claim 2, characterized in that: The coarse filtration box is divided into an upper cavity, a middle cavity and a lower cavity from top to bottom. The upper cavity is connected to the fine filtration box, the middle cavity is connected to the dust air conveying pipeline and has multiple cyclone dust collectors evenly distributed therein, and the lower cavity can be connected to the dust exhaust mechanism.

4. The automatic dust removal device for rail grinding according to claim 1, characterized in that: The fine filtration box adopts a cartridge dust collector, which can perform secondary filtration on dust-containing gas.

5. The automatic dust removal device for rail grinding according to claim 4, characterized in that: The fine filter box is divided into a dust air cavity and a clean air cavity. The dust air cavity is the space formed between the outer side of the filter cartridge dust collector and the inner wall of the fine filter box, and the dust air cavity is used to accommodate the dust-containing gas before the secondary filtration; the clean air cavity is the space formed between the filter cartridge dust collector and the suction mechanism, and the clean air cavity is used to accommodate the clean air after the secondary filtration.

6. The automatic dust removal device for rail grinding according to claim 5, characterized in that: A back-blowing mechanism is provided in the clean air cavity, which can remove dust attached to the filter cartridge dust collector.

7. The automatic dust removal device for rail grinding according to claim 4, characterized in that: The fine filtration box is provided with a plurality of the cartridge dust collectors in an array, each of the cartridge dust collectors is horizontally arranged in the fine filtration box and sleeved on a filter element bracket fixed in the fine filtration box, one end of the cartridge dust collector is provided with a cartridge end cover for sealing, and the other end thereof is connected to the suction mechanism.

8. The automatic dust removal device for rail grinding according to claim 1, characterized in that: The dust removal mechanism adopts a screw conveyor, which includes a shell, a spiral conveying blade and a motor. The shell is a closed structure and its top is connected to the bottom of the coarse filter box and the fine filter box. The spiral conveying blade, driven by the motor, can discharge the dust deposited at the bottom of the coarse filter box and the fine filter box through the ash discharge port.

9. The automatic dust removal device for rail grinding according to claim 8, characterized in that: The automatic dust removal device also includes a valve mechanism, which at least includes knife-shaped valves arranged at any two of the bottom of the coarse filter box, the bottom of the fine filter box, and the ash discharge port.

10. The automatic dust removal device for rail grinding according to claim 1, characterized in that: The automatic dust removal device also includes a detection mechanism for monitoring the working status of the coarse filter box and the fine filter box, and the detection mechanism includes a temperature detector and an air pressure detector.

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