Combined device and method for efficiently cleaning belt materials in return stroke of belt conveyor

Abstract

The invention relates to a belt conveyor return stroke belt material efficient cleaning combined device and method, and belongs to the technical field of ore wharf belt conveyor operation. According to the technical scheme, operation materials conveyed on a belt fall down from a roller at the tail of a belt conveyor, and impact surface materials are formed on an impact surface; the sweeper device is installed on the lower portion of a tail roller of the belt conveyor and used for cleaning the return stroke face of a rubber belt of the belt conveyor, and the high-pressure flushing device is installed between an operation material falling point and the sweeper device and used for conducting high-pressure flushing on the belt after material falling. The high-pressure water line of the flushing device sprayed by the flushing nozzle is sprayed to the surface of the belt after material falling, materials on the return stroke face of the belt conveyor rubber belt are scattered and diluted, the adhesive capacity of the materials is reduced, and subsequent cleaning of a first-stage sweeper and a second-stage sweeper is facilitated. The invention has the positive effects of efficiently cleaning the return belt material of the belt conveyor, greatly reducing the return belt material of various materials, keeping the surface of the rubber belt clean, reducing the operation dust raising of the belt conveyor and greatly improving the environmental governance effect.

Description

Technical Field

[0001] The invention relates to a combined device and method for efficiently cleaning return belt materials of a belt conveyor, belonging to the technical field of belt conveyor operation at an ore terminal. Background Art

[0002] In the construction of green ports for professional ore terminals, equipment transformation is an important link. The introduction of new equipment can achieve the goal of reducing return material and reducing the spillage of equipment materials. Due to the characteristics of ore materials, the ore powder is very sticky and adheres to the belt surface, resulting in more return material during the operation of the belt conveyor at professional ore terminals. More return material will cause cargo loss, dust pollution, and equipment damage caused by material accumulation.

[0003] The existing technology basically uses different forms of cleaners and cleaner combinations for processing. The cleaners are in the form of rake type, split type and integrated type. The cleaners are made of different materials such as alloy and polyurethane. A variety of scrapers such as U-type, P-type and H-type are used to scrape off the return belt material adhering to the belt surface. For example: the cleaning solutions of foreign cleaner manufacturers such as Fuleshuai and Martin, the way to clean the return belt material of the belt conveyor is to install a first-level cleaner on the head roller of the belt conveyor, and install a second-level cleaner on the head roller and the head surface increase roller. However, the cleaning effect is not ideal because the main stone materials transported are more viscous and have a high water content. Among them, the water content of materials such as Brazilian iron powder and super special powder can reach 9%-10%. When operating ore materials, the existing technical cleaners cannot clean the materials adhering to the belt, and the return belt conveyor will still have materials spilled. Summary of the invention

[0004] The purpose of the present invention is to provide a combination device and method for efficiently cleaning the return material of a belt conveyor, which can efficiently clean the return material of a belt conveyor, significantly reduce the return material of various materials, keep the surface of the belt clean, reduce dust from the operation of the belt conveyor, greatly improve the environmental management effect, and solve the above-mentioned technical problems existing in the background technology.

[0005] The technical solution of the present invention is as follows: A belt conveyor return belt material efficient cleaning combination device, composed of a high-pressure flushing device and a sweeper device, the sweeper device is installed at the lower part of the belt conveyor tail roller, the belt conveyor belt return surface is cleaned, the high-pressure flushing device is installed between the working material drop point and the sweeper device, the belt after the material drop is high-pressure flushed; the high-pressure flushing device comprises a control cabinet, an equipment cabinet and a flushing pipeline, the flushing pipeline comprises a flushing pipe and a flushing nozzle, the flushing pipe is provided with a plurality of flushing nozzles along the axial direction, the flushing pipe is arranged along the axial direction of the roller, the flushing nozzle is arranged toward the belt on the roller, the control cabinet controls A device cabinet is provided, which includes a frequency conversion pump, and high-pressure flushing water is provided to the flushing pipeline through the frequency conversion pump; the flushing pipeline is installed at a position slightly below the center line of the drum, 150-200mm away from the drum; the flushing nozzle is sprayed upward at an angle of 40°-50° to the drum surface; the flushing pipe of the flushing pipeline is connected to the high-pressure water outlet pipe through a pipeline, the flushing nozzle is a fan-shaped nozzle, and the equivalent diameter range of the fan-shaped nozzle is 0.91-1.5mm; the distance between two adjacent fan-shaped nozzles is 150-200mm; the sweeper device includes a primary sweeper and a secondary sweeper.

[0006] Furthermore, the primary cleaner and the secondary cleaner are devices commonly known in the art. Furthermore, the angle between adjacent fan-shaped nozzles is 1°-3° to prevent the nozzles from interfering with each other.

[0007] Furthermore, a sheath is arranged outside the flushing nozzle, the sheath is entirely wrapped outside the flushing pipe, and a plurality of through holes are arranged on the sheath to match a plurality of flushing nozzles. The sheath is a steel pipe sleeved outside the flushing pipe to prevent the flushing pipe from being bent by collision with materials.

[0008] Furthermore, a card slot is installed on the sleeve, and the flushing pipe and the sleeve are quickly installed and positioned through the installation card slot.

[0009] Furthermore, the control cabinet includes a host switch, a heating pipe, a pump insulation, a solenoid valve, a control switch, a relay, a contactor, a main circuit breaker, a frequency converter and a load terminal, and performs automatic control and data collection and transmission through a network, a 24V transformer, a control terminal block, a PLC power supply and a PLC. The control cabinet communicates with the equipment operation signal through the PLC, and is divided into two control modes: automatic and manual. Automatic control: the equipment operation is controlled by the material signal and the belt conveyor operation signal; manual control: the equipment start and stop are manually controlled. Automatic water supply is realized by PLC control, and the automatic water spraying operation of the equipment is realized according to the on-site material detection and operation detection.

[0010] Furthermore, the equipment cabinet includes a high-pressure water outlet pipe, a frequency conversion pump, a pump inlet pipe, a backwash filter, a reclaimed water inlet pipe and a relay water tank inlet pipe; the water source is connected to the backwash filter through the reclaimed water inlet pipe, the relay water tank inlet pipe is connected between the backwash filter and the relay water tank, the pump inlet pipe connects the relay water tank and the frequency conversion pump, and the output end of the frequency conversion pump is connected to the flushing pipeline through the high-pressure water outlet pipe. The water is pressurized to a range of 0-50bar as required by the frequency conversion pump to meet the different needs of flushing. The frequency conversion pump can change the output pressure through frequency conversion control to adapt to different types of materials. Since the water quality of the on-site water is low and there are many impurities, a backwash filter needs to be installed. The backwash filter automatically adopts automatic control. When the inlet and outlet water pressure exceeds the set value, the backwash filter automatically starts the backwash function to flush the filter element and reduce the problem of equipment clogging.

[0011] A method for efficiently cleaning the return belt of a belt conveyor, which is used for cleaning the belt conveyor at an ore terminal, adopts the above-mentioned combined device and comprises the following steps: The working material transported on the belt falls on the rear roller of the belt conveyor, forming the material on the impact surface; the sweeper device is installed at the lower part of the rear roller of the belt conveyor to clean the return surface of the belt conveyor belt, and the high-pressure flushing device is installed between the falling point of the working material and the sweeper device to perform high-pressure flushing on the belt after the material falls; the high-pressure water line of the flushing device sprayed by the flushing nozzle is sprayed onto the surface of the belt after the material falls, which disperses and dilutes the material on the return surface of the belt conveyor belt, reduces its adhesion ability, and is convenient for the subsequent first-level cleaner and second-level cleaner to clean.

[0012] The positive effects of the present invention are as follows: the return material of the belt conveyor can be efficiently cleaned, the return material of various materials can be greatly reduced, the surface of the belt can be kept clean, the dust generated by the belt conveyor operation can be reduced, and the environmental management effect can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an electric control cabinet of a high-pressure flushing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of an equipment cabinet of a high-pressure washing device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a flushing pipe of a high-pressure flushing device according to an embodiment of the present invention; Figure 4 It is a side view of a flushing pipe of a high-pressure flushing device according to an embodiment of the present invention; Figure 5 It is intended to be installed on site in the embodiment of the present invention; In the figure: main switch 1, heating tube 2, pump insulation 3, solenoid valve 4, control switch 5, network 6, 24V transformer 7, relay 8, contactor 9, load terminal 10, control terminal block 11, main circuit breaker 12, PLC power supply 13, PLC 14, frequency converter 15, relay water tank 16, high-pressure water outlet pipe 17, frequency conversion pump 18, pump water inlet pipe 19, backwash filter 20, reclaimed water inlet pipe 21, relay water tank inlet pipe 22, flushing pipe 23, sheath 24, flushing nozzle 25, operating material 26, flushing device high-pressure water line 27, flushing pipeline 28, roller 29, material on impact surface 30, primary cleaner 31, secondary cleaner 32, belt conveyor belt return surface 33. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below by the following examples.

[0015] A belt conveyor return belt material efficient cleaning combination device, composed of a high-pressure flushing device and a sweeper device, the sweeper device is installed at the lower part of the belt conveyor tail roller 29, the belt conveyor belt return surface 33 is cleaned, the high-pressure flushing device is installed between the working material 26 landing point and the sweeper device, the belt after the material is dropped is high-pressure flushed; the high-pressure flushing device comprises a control cabinet, an equipment cabinet and a flushing pipeline 28, the flushing pipeline comprises a flushing pipe 23 and a flushing nozzle 25, the flushing pipe 23 is provided with a plurality of flushing nozzles 25 along the axial direction, the flushing pipe 23 is arranged along the axial direction of the roller 29, the flushing nozzle 25 is arranged toward the belt on the roller 29, the control cabinet A control equipment cabinet is provided, wherein the equipment cabinet includes a variable frequency pump 18, through which high-pressure flushing water is provided to the flushing pipeline; the flushing pipeline 28 is installed at a position slightly below the center line of the drum 29, 150-200mm away from the drum; the flushing nozzle 25 sprays upward at an angle of 40°-50° to the drum surface; the flushing pipe 23 of the flushing pipeline 28 is connected to the high-pressure water outlet pipe 17 through a pipeline, and the flushing nozzle is a fan-shaped nozzle, and the equivalent diameter range of the fan-shaped nozzle is 0.91-1.5mm; the distance between two adjacent fan-shaped nozzles is 150-200mm; the sweeper device includes a primary sweeper 31 and a secondary sweeper 32.

[0016] The primary cleaner 31 and the secondary cleaner 32 are devices well known and used in the art.

[0017] Preferably, the angle between adjacent fan-shaped nozzles is 1°-3° to prevent the nozzles from interfering with each other.

[0018] Preferably, a sheath 24 is disposed outside the flushing nozzle 25, and the sheath 24 is entirely wrapped around the flushing pipe 23. The sheath 24 is provided with multiple through holes to match multiple flushing nozzles 25. The sheath 24 is a steel pipe sleeved outside the flushing pipe 23 to prevent the flushing pipe 23 from being bent by collision with materials.

[0019] Preferably, a card slot is installed on the sheath 24, and the flushing tube 23 and the sheath 24 are quickly installed and positioned through the installation card slot.

[0020] Refer to the attached Figure 1 The control cabinet includes a host switch 1, a heating tube 2, a pump insulation 3, a solenoid valve 4, a control switch 5, a relay 8, a contactor 9, a main circuit breaker 12, a frequency converter 15 and a load terminal 10, and performs automatic control and data collection and transmission through a network 6, a 24V transformer 7, a control terminal block 11, a PLC power supply 13 and a PLC 14. The control cabinet communicates with the equipment operation signal through the PLC, and is divided into two control modes: automatic control: the equipment operation is controlled by the material signal and the belt conveyor operation signal; manual control: the equipment start and stop are manually controlled. Automatic water supply is realized by PLC control, and the automatic water spraying operation of the equipment is realized according to the on-site material detection and operation detection.

[0021] Refer to the attached Figure 2 The equipment cabinet includes a high-pressure water outlet pipe 17, a variable frequency pump 18, a pump inlet pipe 19, a backwash filter 20, a medium water inlet pipe 21 and a relay water tank inlet pipe 22; the water source is connected to the backwash filter 20 through the medium water inlet pipe 21, the relay water tank inlet pipe 22 is connected between the backwash filter 20 and the relay water tank 16, the pump inlet pipe 19 connects the relay water tank 16 and the variable frequency pump 18, and the output end of the variable frequency pump 18 is connected to the flushing pipeline through the high-pressure water outlet pipe 17; the water is pressurized to a range of 0-50bar as required by the variable frequency pump 18 to meet the different needs of flushing. The variable frequency pump 18 can change the output pressure through frequency conversion control to adapt to different types of materials. Since the water quality of the on-site water is low and there are many impurities, it is necessary to install a backwash filter 20. The backwash filter automatically adopts automatic control. When the inlet and outlet water pressure exceeds the set value, the backwash filter 20 automatically starts the backwash function to flush the filter element and reduce the problem of equipment clogging.

[0022] The flushing pipe 23 of the flushing pipeline 28 is connected to the high-pressure water outlet pipe 17 through a pipeline. The flushing nozzle is a fan-shaped nozzle, and the equivalent diameter range of the fan-shaped nozzle is 0.91-1.5mm; if the equivalent diameter of the fan-shaped nozzle is less than 0.91mm, the flushing force will be small, and clogging will easily occur during operation. If the equivalent diameter is greater than 1.5mm, the amount of water will increase greatly, causing the water content of the transported materials to increase beyond the allowable value. The distance between two adjacent nozzles is 150-200mm. In order to prevent the water lines sprayed from adjacent fan-shaped nozzles from interfering with each other, the spray angle of the fan-shaped nozzle is 1°-3°. If the angle is less than this range, there will still be interference between the water lines. If it exceeds this range, the flushing water line and the tape will be too small, resulting in a decrease in the flushing effect. The fan-shaped nozzle and the water spray pipe are connected by pipe threads.

[0023] Due to the harsh working environment, fan-shaped nozzles often become clogged, resulting in reduced flushing effects. To achieve rapid disassembly and repair of the flushing pipe 23, a high-pressure joint is used to quickly connect the flushing pipe 23 and the high-pressure water outlet pipe 17, which facilitates rapid disassembly of the water pipe when the nozzle is clogged. Since this position is close to the material, when the belt conveyor is started under heavy load, problems such as the material bending the flushing pipe 23 may occur. To enhance the impact resistance of the flushing pipe 23, a DN65 steel pipe is placed on the flushing pipe 23 as a sheath 24 to prevent the flushing pipe 23 from being bent by collision with the material. At the same time, a card slot is installed on the sheath 24 to achieve rapid installation and positioning of the flushing pipe 23 and the sheath. The rapid disassembly and installation of the flushing pipe 23 can greatly reduce the difficulty of maintenance, and plays an important role in ensuring the integrity of the equipment.

[0024] A method for efficiently cleaning the return belt of a belt conveyor, which is used for cleaning the belt conveyor at an ore terminal, adopts the above-mentioned combined device and comprises the following steps: The working material 26 transported on the belt falls on the tail roller 29 of the belt conveyor, forming material 30 on the impact surface; the sweeper device is installed at the lower part of the tail roller 29 of the belt conveyor to clean the return surface 33 of the belt conveyor belt, and the high-pressure flushing device is installed between the falling point of the working material 26 and the sweeper device to perform high-pressure flushing on the belt after the material falls; the high-pressure water line 27 of the flushing device sprayed by the flushing nozzle 25 is sprayed onto the surface of the belt after the material falls, so as to disperse and dilute the material on the return surface 33 of the belt conveyor belt, reduce its adhesion ability, and facilitate the subsequent first-level sweeper 31 and second-level sweeper 32 to clean.

[0025] In the embodiments, refer to the attached Figure 5 , the working material 26 is thrown out due to inertia during the operation process, and a small amount of sticky material is attached to the belt. The high-pressure water directly impacts the belt to disperse and dilute the material on the return surface 33 of the belt conveyor belt, reducing its adhesion. The flushing pipeline 28 is installed below the center line of the roller 29, 150-200mm away from the roller. If the distance is too close, the flushing pipe will collide with the sticky material on the belt, and if the distance is too far, the flushing force will be reduced, thereby reducing the cleaning effect of the return belt material. The flushing nozzle 25 sprays upward at an angle of 40°-50° to the surface of the roller. The flushing pipeline 28 is installed below the center line of the roller 29, 150-200mm away from the roller, and the length is 200mm.

[0026] The material 30 on the impact surface is the material that hits the impact surface after being thrown out. The primary cleaner 31 is an alloy split cleaner, which performs preliminary cleaning on the belt return surface 33 of the belt conveyor. The secondary cleaner 32 is an alloy split cleaner, which cleans the remaining water on the belt return surface 33 of the belt conveyor. The cleaner devices are all installed in the belt conveyor head cover. The flushed material is mixed with water and directly enters the hopper and falls to the lower belt conveyor.

[0027] If the high-pressure flushing device is installed behind the sweeper device, there are the following defects: 1. The water on the belt cannot be completely cleaned, resulting in more water on the return belt. 2. The large amount of water causes a sudden increase in the water content of the lower belt, which increases the viscosity of the material, making it more difficult to clean the lower belt, and also causes an increase in unloading tons. 3. The dropped water material is difficult to clean.

[0028] The present invention installs the flushing pipeline 28 before the primary cleaner, and the flushing pressure is increased to a high pressure of 50 bar. Under this pressure, the impact force of the water flow is greatly improved, and the return material can be flushed clean more efficiently.

[0029] The specific operation includes the following process steps: 1. After the equipment is installed, the operation mode in the control cabinet is manually controlled and a flushing test is carried out. During the flushing process, the water pressure is set from 0 to 50 bar for a step-by-step test. During the experiment, the water flow gradually increases, and the flushing effect on the tape gradually increases.

[0030] 2. Start the belt conveyor and conduct a dynamic test run. The sweeper device will spray water into the hopper. The water from the flushing nozzle 25 will flow upward at an angle of 45 degrees to flush the belt conveyor belt; at the same time, the sweeper device will run smoothly without jumping.

[0031] 3. Adjust the equipment to automatic mode. During the operation, set the pressure for different materials. The pressure setting table is shown in Table 1 below:

[0032] 4. The setting steps are as follows: Press the emergency stop button on the control cabinet to stop the pump station. Then click the equipment operation parameter setting and refer to the recommended table to set the flushing pressure. Finally, restore the emergency stop and the equipment will restart automatically within 10 seconds.

[0033] For different materials, the pressure of the high-pressure flushing device can be adjusted to reduce water consumption while meeting the need to reduce the return material. According to the characteristics of different materials, changing the flushing pressure can achieve a higher efficiency ratio. Taking Australian ore powder as an example, when operating Australian ore powder, the ideal effect can be achieved when the flushing pressure reaches 20MPa, and the return material spillage of Australian ore powder is reduced from 32.3 to 0.2 (g / 10,000 tons / square meter). When operating other materials, different flushing pressures can be applied according to their characteristics to achieve ideal treatment effects. After the implementation of the present invention, the return material carrying of the belt conveyor is greatly reduced. The material receiving plate can be kept clean for a long time. The material spillage cleaning can be reduced from once per ship to once a month. The intensity of each cleaning is greatly reduced. The machine appearance is greatly improved.

[0034] In the embodiment, after the material passes through the head redirection roller 29, the belt adhesive material is firstly washed and cleaned by the flushing water pipe, and then the primary cleaner and the secondary cleaner successively clean the residual water material on the return belt. After passing through the secondary cleaner, the return belt material can be basically cleaned. The length of the high-pressure water line is 200mm, and the angle between the water line and the belt is about 45°. According to the test, this angle has the best flushing effect. 7 flushing nozzles are installed, and the water consumption is 1.4m³ / h (30bar theoretical value).

[0035] The present invention has been first used on the belt conveyor of the ore terminal, and the treatment effect is obvious. The spillage of the return belt of Australian ore has been reduced from 32.3 to 0.2 (g / 10,000 tons / square meter), the spillage of the return belt of super special powder has been reduced from 21.0 to 2.9 (g / 10,000 tons / square meter), the spillage of the return belt of Mike powder has been reduced from 29.4 to 3.4 (g / 10,000 tons / square meter), the spillage of the return belt of MB powder has been reduced from 190.5 to 4.5 (g / 10,000 tons / square meter), the spillage of the return belt of Jinbuba powder has been reduced from 104.6 to 22.5 (g / 10,000 tons / square meter), and the spillage of PB powder has been reduced from 78.2 to 6.8 (g / 10,000 tons / square meter).

Claims

1. A belt conveyor return belt material efficient cleaning combination device, characterized in that: The invention is composed of a high-pressure flushing device and a cleaning device. The cleaning device is installed at the lower part of the tail roller (29) of the belt conveyor to clean the return surface (33) of the belt conveyor belt. The high-pressure flushing device is installed between the drop point of the working material (26) and the cleaning device to perform high-pressure flushing on the belt after the material falls. The high-pressure flushing device comprises a control cabinet, an equipment cabinet and a flushing pipeline (28). The flushing pipeline comprises a flushing pipe (23) and a flushing nozzle (25). The flushing pipe (23) is provided with a plurality of flushing nozzles (25) along the axial direction. The flushing pipe (23) is arranged along the axial direction of the roller (29). The flushing nozzles (25) are arranged toward the belt on the roller (29). The control cabinet controls the equipment cabinet. The equipment cabinet controls the belt. The cabinet includes a variable frequency pump (18), which provides high-pressure flushing water to the flushing pipeline through the variable frequency pump (18); the flushing pipeline (28) is installed at a position below the center line of the drum (29) and 150-200 mm away from the drum; the flushing nozzle (25) sprays upward at an angle of 40°-50° to the drum surface; the flushing pipe (23) of the flushing pipeline (28) is connected to the high-pressure water outlet pipe (17) through a pipeline, and the flushing nozzle (25) is a fan-shaped nozzle, and the equivalent diameter range of the fan-shaped nozzle is 0.91-1.5 mm; the distance between two adjacent fan-shaped nozzles is 150-200 mm; the cleaning device includes a primary cleaning device (31) and a secondary cleaning device (32).

2. According to claim 1, a belt conveyor return belt material efficient cleaning assembly device is characterized by: The spray angles of the adjacent fan-shaped nozzles are 1°-3°.

3. A belt conveyor return belt material efficient cleaning assembly device according to claim 1 or 2, characterized in that: A sheath (24) is disposed outside the flushing nozzle (25), the sheath (24) being entirely wrapped around the flushing pipe (23), and a plurality of through holes are disposed on the sheath (24) to match the plurality of flushing nozzles (25).

4. The high-efficiency cleaning assembly device for the return belt of a belt conveyor according to claim 3 is characterized in that: The sleeve (24) is provided with a mounting slot, and the flushing tube (23) and the sleeve (24) are quickly mounted and positioned via the mounting slot.

5. The high-efficiency cleaning assembly device for the return belt of a belt conveyor according to claim 1 is characterized in that: The equipment cabinet comprises a high-pressure water outlet pipe (17), a variable frequency pump (18), a pump water inlet pipe (19), a backwash filter (20), a reclaimed water inlet pipe (21) and a relay water tank inlet pipe (22); the water source is connected to the backwash filter (20) via the reclaimed water inlet pipe (21), the relay water tank inlet pipe (22) is connected between the backwash filter (20) and the relay water tank (16), the pump water inlet pipe (19) connects the relay water tank (16) and the variable frequency pump (18), and the output end of the variable frequency pump (18) is connected to the flushing pipeline via the high-pressure water outlet pipe (17).

6. A method for efficiently cleaning the return belt of a belt conveyor, using a combination device for efficiently cleaning the return belt of a belt conveyor as claimed in any one of claims 1 to 5, for cleaning the belt conveyor at an ore terminal, characterized in that The following steps are included: The working material (26) transported on the belt falls on the tail roller (29) of the belt conveyor, and forms the material on the impact surface (30) on the impact surface; the sweeper device is installed at the lower part of the tail roller (29) of the belt conveyor to clean the return surface (33) of the belt conveyor belt, and the high-pressure flushing device is installed between the falling point of the working material (26) and the sweeper device to perform high-pressure flushing on the belt after the falling material; The high-pressure water line (27) of the flushing device sprayed by the flushing nozzle (25) is sprayed onto the belt surface after the material is dropped, so as to disperse and dilute the material on the return surface (33) of the belt conveyor belt, thereby reducing its adhesion ability, thereby facilitating subsequent cleaning by the primary cleaner (31) and the secondary cleaner (32).

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