Suspension type multi-layer lifting spraying dust suppression device and method for ore unloading bin of railway dump car

Abstract

The invention discloses a suspension type multi-layer lifting spraying dust suppression device and method for an ore unloading bin of a railway dump truck, the suspension type multi-layer lifting spraying dust suppression device comprises a spraying square frame assembly formed by welding a spraying transverse pipe, a spraying vertical pipe, a reinforcing rib and an anti-buckling stop lever, the length of the spraying square frame assembly is matched with the length of the ore bin, and an electric hoist is hung on a ceiling of the ore bin. A water inlet pipe is arranged on the outer side of the middle of the spraying vertical pipe and connected with a water inlet hose through a quick-change connector, and the other end of the water inlet hose is connected with a high-pressure spraying machine. During use, the manufactured spraying square frame assembly is hung at a proper position of the center of the upper portion of an ore storage bin through an electric hoist, and during turnover, the spraying device is started to sweep raised dust through mist spraying. The device is simple in structure, easy to manufacture and install and low in cost investment, the major problem of dust pollution of ore unloading operation of the concave separation raw ore bin can be thoroughly solved, the environmental supervision requirement is met, workers are liberated from the severe working environment, and the risk that production halt and renovation are responded due to the fact that dust pollutes the environment is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of ore bin material transportation, and in particular to a suspended multi-layer lifting spray dust suppression device and method for a railway self-dumping car ore bin. Background Art

[0002] The qualified ore (particle size 0-16mm) produced by the iron ore production is transported to the concave selection ore bin for storage by railway self-dumping cars (pulled by electric locomotives, each group of cars has 9 cars), and then transported to the next process by belt conveyors for a series of selections, and finally the iron ore concentrate products are obtained. The railway self-dumping cars pulled by electric locomotives unload ore 18 times during the day shift and 28 times during the night shift, unloading about 414 cars of more than 20,000 tons of ore every day. Therefore, the stable operation of the concave selection ore bin is a key link to ensure the smooth production of Nanshan Mine. There are rails on both sides of the concave selection ore bin, and the self-dumping cars are pulled by electric locomotives to unload ore on both sides of the ore bin. The self-dumping car unloading operation requires the shunter to manually operate the dumping handle on site to unload the ore. Problems that exist during the unloading operation:

[0003] (1) Since the ore particle size is 0-16mm, the unloading operation is dusty and the shunters are covered in dust. They have to wear masks even in hot weather. The blue work clothes they wore before the shift turn gray after get off work, and their faces become stained (dust and sweat). They have to take a shower and wash their work clothes every shift. The shunters work in a dusty and harsh environment for a long time, which greatly harms their physical and mental health.

[0004] (2) Since the silo is located at a high place, dust will spread during the unloading operation, causing great harm to the locomotive driver, surrounding equipment, operators and the environment, which is more serious when the wind is strong.

[0005] (3) Failure to comply with national occupational health standards and environmental protection supervision requirements leads to the risk of suspension of production and rectification.

[0006] In order to solve the above problems, fog cannons and various dust suppression devices were installed in reality. Due to the special structure of the ore unloading on both sides of the ore bin, the spray device cannot suppress the overflowing dust at the bin mouth in the first time. Once the spray device is turned on, the spray airflow will carry the overflowing dust and scatter it everywhere, and the shunter will be splashed with mud and water all over the body. The entire site, vehicles and surrounding equipment will be covered in mud and water, and the secondary pollution will be more serious. In particular, the shunter’s eyes cannot be opened, which poses a great safety hazard. Therefore, the dust suppression devices installed before have been idle.

[0007] The above problems have resulted in the inability to effectively solve the dust pollution problem in the unloading operation of the concave ore bin, which has become a major problem in the production and operation of Nanshan Mine. In the context of the continuous deepening of green mine construction, it is urgent to solve this problem.

[0008] After searching, in the prior art, patent application number CN202021179547.X discloses a dust suppression device for unloading ore on a mine track, which densely arranges nozzles on the side of the silo anti-collision beam to suppress dust. Its defects and problems: it cannot effectively suppress dust with strong airflow. The key is that when the silo is full, the ore covers the water spray pipe, and the dust suppression device fails and is damaged, and cannot be used normally. Summary of the invention

[0009] The purpose of the present invention is to provide a suspended multi-layer lifting spray dust suppression device and method for a railway self-dumping car unloading ore bin, so as to eliminate the major problem of dust pollution to the environment caused by the railway self-dumping car unloading operation in the concave ore bin, liberate employees from the harsh working environment, consolidate the environmental protection red line, and solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A suspended multi-layer lifting spray dust suppression device for a railway self-dumping car unloading ore bin comprises a spray transverse pipe, a spray riser, reinforcement ribs and an anti-car buckling barrier rod; the spray transverse pipes are provided with four, the spray riser is provided with two, the four spray transverse pipes and the two spray riser are welded into a spray frame assembly structure through reinforcement ribs and an anti-car buckling barrier rod, the length of the spray frame assembly matches the length of the ore bin, an electric hoist is hung on the ceiling of the ore bin, and the hook end of the electric hoist is hung on the reinforcement rib; the spray transverse pipe and the spray riser are interconnected, a water inlet pipe is provided on the middle outer side of the spray riser, the water inlet pipe is connected to a water inlet hose through a quick-change joint, the other end of the water inlet hose is connected to a high-pressure sprayer, the high-pressure sprayer transports water through the water inlet hose to the spray riser and the spray transverse pipe, and a number of nozzles are correspondingly provided on the spray riser and the spray transverse pipe; wherein The spray frame assembly is divided into four layers by four spray cross pipes and two spray risers. Three side nozzles are respectively arranged at the front, back and both ends of the spray risers on each layer, and the side nozzles are installed at an angle of 11° downward; a lower nozzle is arranged on the lower end face of each spray riser, and a total of 26 nozzles are arranged on the two spray risers; among them, the four spray cross pipes are 1#, 2#, 3#, and 4# from bottom to top, which are consistent with the layering of the spray risers. The spray cross pipe is provided with an electric control valve at one end close to the spray riser. Two side nozzles are arranged at every 500mm interval on the spray cross pipe, and are installed at an angle of 11° downward, for a total of 42 nozzles; a lower nozzle is arranged in the middle of the two side nozzle intervals and is installed vertically downward, for a total of 22 nozzles; a total of 64 nozzles are arranged on each spray cross pipe, and the nozzles on adjacent spray cross pipes are staggered, and a total of 284 nozzles are arranged on the four spray cross pipes.

[0012] Furthermore, the diameter of the spray riser is greater than the diameter of the spray cross pipe.

[0013] Furthermore, a lifting lug matched with the hook end of the electric hoist is provided on the top of the reinforcing rib, and the spray frame assembly is suspended at the center line position of the upper part of the ore bin through the electric hoist.

[0014] Furthermore, the electric hoist is controlled by a control box, and the control box is arranged on a column on the side of the ore bin.

[0015] Furthermore, the high-pressure sprayer is controlled by a controller, and the controller is arranged on a column on the side of the mine bin.

[0016] Furthermore, the nozzle is a 60°-90° conical atomizing nozzle, and the nozzle is installed on the spray horizontal pipe and the spray vertical pipe by means of marking, drilling, and threaded short-connection.

[0017] The present invention provides another technical solution: a method for using a suspended multi-layer lifting spray dust suppression device for a railway self-dumping car unloading ore bin, comprising the following steps:

[0018] S1: Make the spray frame assembly, and use two electric hoists to synchronously raise it, and hang the spray frame assembly at a suitable position in the center of the upper part of the ore bin, so that the water mist sprayed by the nozzle can achieve the best dust suppression effect;

[0019] S2: The electric locomotive pulls the self-dumping car into the ore bin to unload the ore. When the car is dumped, the spray device is turned on synchronously;

[0020] S3: The spray first moistens the surface of the ore inside and outside the carriage and the bottom of the silo, as well as the periphery of the silo opening, and continuously moistens the falling ore, suppressing the secondary dust caused by the falling of part of the ore flow and the impact of the ore flow on the ore in the silo;

[0021] S4: The rapid drop of the ore flow impacts the ore materials at the bottom of the silo, generating a strong airflow that carries a large amount of dust toward the silo opening, which is first suppressed by the first layer of water mist; the dust that escapes the net continues to rise and is suppressed by the second layer of water mist; the remaining dust rises again and is suppressed by the third layer of water mist; the fourth layer of water mist is used to sweep the dust, and finally stops completely at the silo opening.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The railway self-dumping car ore bin suspended multi-layer lifting spray dust suppression device and method of the present invention adopts a suspended installation method, with a novel and unique design. The four layers of nozzles spray at the same angle to completely cover the ore bin opening, suppress the dust in all directions, and make the dust gather above the bin opening and fall into the ore bin. It not only has a good dust suppression effect, but also does not cause secondary pollution. Since the spray dust suppression increases the humidity of the ore material slightly, it also has a good suppressive effect on the dust in the subsequent ore material transportation process. Its suspended design is not only more convenient to install and maintain, but also does not hinder the maintenance of the ore bin. Its application has no effect on the existing production conditions and production sequence, and has reached a relatively ideal state in terms of economy and practicality.

[0024] Secondly, the present invention has a simple structure, is easy to manufacture and install, and has low cost investment. It can completely solve the major problem of dust pollution in the unloading operation of the concave ore bin, meet the requirements of environmental protection supervision, liberate employees from harsh working environments, and eliminate the risk of being ordered to suspend production and rectify due to dust pollution, thus playing a positive role in the high-quality development of Nanshan Mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall ore bin structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 Schematic diagram of the installation of the 3# ore bin spraying device;

[0027] Figure 3 For the present invention Figure 1 The effect diagram of the 2# ore bin spraying device;

[0028] Figure 4 For the present invention Figure 3 Enlarged view of point A.

[0029] In the figure: 1. spray horizontal pipe; 101. electric control valve; 102. side nozzle; 103. lower nozzle; 2. spray vertical pipe; 201. water inlet pipe; 202. water inlet hose; 3. reinforcing rib; 301. lifting lug; 4. anti-buckle bar; 5. electric hoist; 501. control box; 6. ceiling; 7. anti-buckle beam; 8. self-tipping vehicle; 9. high-pressure sprayer; 901. controller. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-4The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device comprises a spray transverse pipe 1, a spray riser 2, a reinforcing rib 3 and an anti-car buckle barrier rod 4; the spray transverse pipes 1 are provided with four, the spray riser 2 is provided with two, the four spray transverse pipes 1 and the two spray risers 2 are welded to form a spray frame assembly structure through the reinforcing rib 3 and the anti-car buckle barrier rod 4, the length of the spray frame assembly matches the length of the ore bin, an electric hoist 5 is hung on the ceiling 6 of the ore bin, and the electric The hook end of the electric hoist 5 is hung on the reinforcing rib 3, and the top of the reinforcing rib 3 is provided with a lifting ear 301 adapted to the hook end of the electric hoist 5. The spray frame assembly is suspended at the upper centerline position of the ore bin through the electric hoist 5. The electric hoist 5 is controlled by a control box 501, and the control box 501 is arranged on the column on the side of the ore bin, which is convenient for the operator to control; the spray horizontal pipe 1 and the spray vertical pipe 2 are interconnected, and a water inlet is arranged on the middle outer side of the spray vertical pipe 2. The water inlet pipe 201 is connected to the water inlet hose 202 through a quick-change joint, and the other end of the water inlet hose 202 is connected to the high-pressure sprayer 9. The high-pressure sprayer 9 is controlled by the controller 901, and the controller 901 is arranged on the column on the side of the mine bin. The water pipe of the high-pressure sprayer 9 is laid from under the roadbed to both sides of the mine bin opening, which is convenient for connection with the water inlet hose 202. The spray box components on the top of the three mine bins can share a high-pressure spray host (the host power and flow rate must meet the water mist particles of 20-50 microns, and the nozzle spray straight-line distance without wind influence is not less than 1.5 meters) or be independently configured; the high-pressure sprayer 9 transports the water flow to the spray riser 2 and the spray cross pipe 1 through the water inlet hose 202. The spray riser 2 and the spray cross pipe 1 are correspondingly provided with a plurality of nozzles, which are 60°-90° conical atomizing nozzles, and the nozzles are installed on the spray cross pipe 1 and the spray riser 2 by marking, drilling, and threaded short-circuiting.

[0032] The spray frame assembly in the embodiment of the present invention is divided into four layers by four spray transverse pipes 1 and two spray risers 2. The diameter of the spray riser 2 is larger than the diameter of the spray transverse pipe 1. The spray risers 2 of each layer are respectively provided with three side nozzles 102 at the front, back and both ends. The side nozzles 102 are installed with an inclination of 11° downward; a lower nozzle 103 is provided on the lower end surface of each spray riser 2, and a total of 26 nozzles are provided on the two spray risers 2; among them, the four spray transverse pipes 1 are 1#, 2#, 3#, and 4# from bottom to top, which are consistent with the layering of the spray risers 2. The spray transverse pipe 1 is provided with a nozzle 103 at one end close to the spray riser 2. Electric control valve 101, two side nozzles 102 are set at every 500mm before and after the spray cross pipe 1, and are installed at an angle of 11° downward, with a total of 42 nozzles; a lower nozzle 103 is set in the middle of the two side nozzles 102 and installed vertically downward, with a total of 22 nozzles; each spray cross pipe 1 is provided with 64 nozzles, and the nozzles on adjacent spray cross pipes 1 are staggered, and the four spray cross pipes 1 are provided with a total of 284 nozzles; among them, water supply pipes, water inlet pipes 201, quick-change connectors, electric control valves 101, spray pipes, nozzles, nozzle short circuits and other water supply components are all made of stainless steel to avoid nozzle clogging due to rust.

[0033] In order to further better explain the embodiments of the present invention, a method for using a suspended multi-layer lifting spray dust suppression device for a railway self-dumping car unloading ore bin is also provided, comprising the following steps:

[0034] S1: Make the spray frame components, such as Figure 2 , 3 As shown, two electric hoists 5 are firmly hung on the beam of the ceiling 6 according to the spacing of the lugs 301 on the spray frame assembly, and the hooks are on the center line of the ore bin. The hooks of the electric hoists 5 are lowered to hang the lugs 301 on the spray frame assembly, and the two electric hoists 5 are synchronously raised, so that the spray frame assembly is suspended at a suitable position in the center of the upper part of the ore bin, that is, the water mist sprayed by the nozzle achieves the best dust suppression effect, and the two water inlet hoses 202 are respectively connected to the water inlet pipe 201 at the end of the spray frame at one end and the high-pressure sprayer 9 at the other end. The water delivery pipe of the high-pressure sprayer 9 is laid from under the ballast to both sides of the ore bin opening, which is convenient for connection with the water inlet hose 202;

[0035] S2: The electric locomotive pulls the self-tipping car 8 into the ore bin unloading position. When the car is tipped, the spray device is turned on synchronously;

[0036] S3: Figure 4 As shown, the spray first wets the surface of the ore inside and outside the carriage and the bottom of the bin, as well as the periphery of the ore bin opening, and continuously wets the falling ore, effectively suppressing the secondary dust caused by the falling of part of the ore flow and the impact of the ore flow on the ore in the ore bin;

[0037] S4: The rapid drop of the ore flow impacts the ore materials at the bottom of the silo, generating a strong airflow that carries a large amount of dust toward the silo opening, which is first suppressed by the first layer of water mist; the dust that escapes the net continues to rise and is suppressed by the second layer of water mist; the remaining dust rises again and is suppressed by the third layer of water mist; the fourth layer of water mist is used to sweep the dust, and finally stops completely at the silo opening.

[0038] In summary: the railway self-dumping car ore unloading bin suspended multi-layer lifting spray dust suppression device and method of the present invention, in order to solve the problem that the spray cannot be effectively arranged due to the unloading operation on both sides of the ore bin, cleverly adopts a novel method of suspension arrangement, and adopts four-layer spray dust suppression measures to suppress the entire process of dust generated by the self-dumping car 8 unloading operation in an all-round way, and completely solves the industry problem of dust pollution in the railway self-dumping car 8 unloading operation. When the nozzle is damaged or the ore bin and the anti-buckle beam need to be repaired, the water inlet hose 202 is removed, the electric hoist 5 is lowered, and the spray frame assembly can be quickly moved out of the ore bin and put on the ground, which is convenient for maintenance operations (changing nozzles, ore bin linings, anti-buckle beam welding, etc.). The spray device is suspended and arranged. After the spray is turned off, the remaining water in the spray pipe will flow out from the bottom nozzle. Therefore, in the cold winter with ice, the spray pipe will not be frozen and cracked; the entire device structure is cleverly designed, novel, suitable, simple, easy to make, low cost investment, safe and reliable to use.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A suspended multi-layer lifting spray dust suppression device for railway self-dumping car unloading ore bin, characterized in that: The invention comprises a spray transverse pipe (1), a spray riser (2), a reinforcing rib (3) and an anti-car-locking baffle rod (4); the spray transverse pipes (1) are provided with four, the spray riser (2) is provided with two, the four spray transverse pipes (1) and the two spray riser (2) are welded to form a spray square frame assembly structure through the reinforcing rib (3) and the anti-car-locking baffle rod (4), the length of the spray square frame assembly matches the length of the ore bin, an electric hoist (5) is hung on the ceiling (6) of the ore bin, and the hook end of the electric hoist (5) is hung on the reinforcing rib (3). The rib (3) is on the reinforcing bar (3); the spray horizontal pipe (1) and the spray vertical pipe (2) are connected to each other, a water inlet pipe (201) is provided on the middle outer side of the spray vertical pipe (2), the water inlet pipe (201) is connected to a water inlet hose (202) through a quick-change joint, the other end of the water inlet hose (202) is connected to a high-pressure sprayer (9), and the high-pressure sprayer (9) transports water flow through the water inlet hose (202) to the spray vertical pipe (2) and the spray horizontal pipe (1); wherein the spray frame assembly is connected to the spray vertical pipe (2) and the spray horizontal pipe (1) through four spray horizontal pipes. The pipe (1) and the two spray risers (2) are divided into four layers. The spray risers (2) of each layer are respectively provided with three side nozzles (102) at the front, rear and both ends. The side nozzles (102) are installed at an angle of 11 degrees downward. A lower nozzle (103) is respectively provided on the lower end surface of the spray risers (2). The two spray risers (2) are provided with a total of 26 nozzles. Among them, the four spray transverse pipes (1) are sequentially numbered 1#, 2#, 3# and 4# from bottom to top, which is consistent with the layering of the spray risers (2). The spray transverse pipes (1) are arranged at An electric control valve (101) is provided near one end of the spray riser (2); two side nozzles (102) are provided at intervals of 500 mm on the spray horizontal pipe (1) and are installed at an angle of 11 degrees downward, for a total of 42 nozzles; a lower nozzle (103) is provided in the middle of the interval between the two side nozzles (102) and is installed vertically downward, for a total of 22 nozzles; each spray horizontal pipe (1) is provided with a total of 64 nozzles, and the nozzles on adjacent spray horizontal pipes (1) are staggered, and the four spray horizontal pipes (1) are provided with a total of 284 nozzles.

2. The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device as claimed in claim 1, characterized in that: The diameter of the spray riser (2) is greater than the diameter of the spray horizontal pipe (1).

3. The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device as claimed in claim 1, characterized in that: The top of the reinforcing rib (3) is provided with a lifting lug (301) adapted to the hook end of the electric hoist (5), and the spray frame assembly is suspended at the center line position of the upper part of the ore bin through the electric hoist (5).

4. The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device as claimed in claim 1, characterized in that: The electric hoist (5) is controlled by a control box (501), and the control box (501) is arranged on a column at the side of the ore bin.

5. The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device as claimed in claim 1, characterized in that: The high-pressure sprayer (9) is controlled by a controller (901), and the controller (901) is arranged on a column on the side of the ore bin.

6. The railway self-dumping car unloading ore bin suspended multi-layer lifting spray dust suppression device as claimed in claim 1, characterized in that: The nozzle is a 60°-90° conical atomizing nozzle, and the nozzle is installed on the spray horizontal pipe (1) and the spray vertical pipe (2) by means of marking, drilling and threaded short-circuiting.

7. The method for using the suspended multi-layer lifting spray dust suppression device for the railway self-dumping car unloading ore bin is characterized by: The following steps are involved: S1: The spray frame assembly is manufactured and raised synchronously by two electric hoists (5), and the spray frame assembly is hung at a suitable position in the center of the upper part of the ore bin, that is, the water mist sprayed by the nozzle achieves the best dust suppression effect; S2: The electric locomotive pulls the self-tipping vehicle (8) into the ore bin to unload the ore. When the vehicle tips over, the spray device is turned on synchronously; S3: The spray first moistens the surface of the ore inside and outside the carriage and the bottom of the silo, as well as the periphery of the silo opening, and continuously moistens the falling ore, suppressing the secondary dust caused by the falling of part of the ore flow and the impact of the ore flow on the ore in the silo; S4: The rapid drop of the ore flow impacts the ore materials at the bottom of the silo, generating a strong airflow that carries a large amount of dust toward the silo opening, which is first suppressed by the first layer of water mist; the dust that escapes the net continues to rise and is suppressed by the second layer of water mist; the remaining dust rises again and is suppressed by the third layer of water mist; the fourth layer of water mist is used to sweep the dust, and finally stops completely at the silo opening.

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