Return type step-by-step scraper for bulk ore conveyor in narrow space and material cleaning method

Abstract

The invention discloses a returning type step-by-step scraper for a bulk ore conveyor in a narrow space and a material cleaning method, and belongs to the field of bulk ore transportation equipment. The device comprises a driving device, a trolley device and a positioning device, the driving device comprises a base used for installing and positioning the driving device, a three-in-one driver used for providing power for the system is installed above the base, a crank is installed on the three-in-one driver, a connecting rod is installed at the other end of the crank, a swing rod is installed at the other end of the connecting rod, and the swing rod is installed on the base through a pin shaft. And a push rod is arranged at the long rod end of the swing rod and is connected with the trolley device. By using the returning type step-by-step scraper, the fallen materials can be swept step by step, and the fallen materials can be swept into the chute of the bin after one returning cycle. Meanwhile, the reciprocating type step-by-step scraper is compact in mechanism, all kinematic pairs are matched through dissimilar metal, the problem of occlusion of the same metal is effectively avoided, the special working conditions of various mineral aggregates can be met, and maintenance is easy, convenient and fast.

Description

Technical Field

[0001] This invention relates to bulk mineral transport equipment, and more particularly to a reciprocating step-by-step scraper and cleaning method for use in narrow spaces of a bulk mineral conveyor. Background Technology

[0002] Belt conveyors are the most common equipment for transporting fine ore in the metallurgical industry. During production, factors such as material adhering to the conveyor belt surface, poor contact of the cleaner, and untimely adjustments can cause material to fall back into the head area of ​​the conveyor. This material fall not only results in material transport losses, but excessive accumulation can also cause abnormal damage to the idlers and rollers in that area, and in severe cases, may even lead to a fire.

[0003] Currently, the common material removal technology for the return stroke of belt conveyors is the chain scraper conveyor, which relies on a ring roller chain or a short lifting chain drive to drive the scraper on the device to scrape the material into the chute for discharge. For example, patents CN202222459727.9 and CN202120480075.X use roller chain drive. In practical applications, the head area of ​​the conveyor belt often experiences high humidity due to the high moisture content of the bulk ore or the need for dust suppression spraying. Powdered ore easily forms a slurry that adheres to the surface of the roller chain. Simultaneously, the roller chain is prone to rust and jamming in humid environments, causing inaccurate transmission, skipped teeth, and uneven tension between the two chains, which can easily lead to chain damage. For example, patent CN201520110156.5 uses a short lifting chain drive, which to some extent overcomes the drawbacks of roller chains in humid environments. However, lumpy ore can easily get stuck in the chain links, causing skipped teeth and uneven chain tension, ultimately leading to chain link damage.

[0004] Furthermore, the ring chain drive has certain requirements on the clearance height of the conveyor return path. When the working conditions are narrow, the sprocket diameter is limited, which in turn limits the selection of the available strength ring chain. As a result, the ring chain scraper cannot be used in narrow spaces with insufficient clearance height.

[0005] The above-mentioned technical solutions are not suitable for the special working conditions of belt conveyor head area in the metallurgical industry, which is characterized by dampness, narrow space, and simultaneous transportation of multiple types of mineral materials such as powder and lump ore. They also have problems such as short chain service life and large maintenance workload. Summary of the Invention

[0006] Purpose of the invention: The purpose of this invention is to provide a reciprocating step-by-step scraper and cleaning method for use in narrow spaces of bulk ore conveyors, aiming to solve the problems of short service life and large maintenance workload of chain scrapers under special working conditions such as humid and narrow spaces in the head area of ​​belt conveyors in the metallurgical industry, and simultaneous transportation of multiple types of ore such as powder and lump ore.

[0007] Technical solution: A reciprocating step-by-step scraper for use in narrow spaces in bulk ore conveyors, comprising a drive unit, a trolley unit, and a positioning device;

[0008] The drive unit includes a base for mounting and positioning the drive unit. A three-in-one driver for providing power to the system is mounted on the base. A crank is mounted on the three-in-one driver, and a connecting rod is attached to the other end of the crank. A rocker arm is mounted on the other end of the connecting rod, and the rocker arm is mounted on the base via a pin. Furthermore, a push rod is mounted on the longer end of the rocker arm, and the push rod is connected to the trolley device.

[0009] The trolley device includes a trolley frame connected to a push rod. The trolley frame has four small wheels, four horizontal wheels, and four sets of rail sweepers mounted at its four corners. Several sets of scrapers are evenly spaced on the trolley frame, and the scrapers are mounted on the trolley frame via rotating shafts. Furthermore, a positioning block is mounted on the back of each scraper. When the scraper is perpendicular to the ground, the positioning block presses against the trolley frame, ensuring the scraper remains vertical under force. Furthermore, a pendulum is mounted at each end of the scraper, and a blocking block is mounted on each pendulum. The blocking block is located on the back of the scraper and contacts it. When the pendulum swings in the reverse direction, the blocking block moves away from the scraper, and the scraper remains perpendicular to the ground. Furthermore, when the pendulum swings forward, the blocking block lifts the scraper away from the ground, allowing the scraper to swing in one direction. The direction the pendulum swings towards the head of the trolley device is forward, and the direction it swings towards the tail of the trolley device is reverse.

[0010] The four small wheels on the trolley device are used to keep the trolley frame moving horizontally back and forth, and the four horizontal wheels are used to keep the trolley frame moving in a straight line back and forth. The rail sweeper is used to clean the accumulated material on the guide rail to prevent the accumulated material from obstructing the movement of the trolley device.

[0011] The positioning device includes guide rails for the horizontal reciprocating movement of the trolley device and a fixed frame for positioning and installing the positioning device on the belt conveyor. The positioning device has several sets of impact gauges used in conjunction with the pendulum, and baffles installed on both sides to prevent loose ore from spilling out when the scraper conveyor scrapes material.

[0012] A method for cleaning materials using a reciprocating, step-by-step scraper for confined spaces in a bulk ore conveyor includes the following steps:

[0013] S1. The reciprocating step-by-step scraper is installed below the head area of ​​the belt conveyor. The crank of the drive unit rotates continuously under the drive of the three-in-one driver, causing the connecting rod and the swing arm to swing. When the swing arm swings, it pushes and pulls the trolley frame to reciprocate on the guide rail. After one rotation of the crank, the trolley frame moves forward to the front end point and then returns to the rear end point.

[0014] S2. When the trolley moves forward, it drives the vertically positioned scraper forward, scraping away the accumulated material within its stroke and carrying it to the stroke range of the next scraper section. The next scraper section then scrapes away the material as it moves forward again. The final scraper section scrapes the accumulated material into the chute for discharge, achieving a step-by-step material cleaning and recycling effect. There is a 50-100mm overlap between the stopping position of the front scraper group and the starting stroke position of the rear scraper group to avoid missing material. The working stroke of each scraper group is 800-1000mm. Several scraper groups can be stacked according to the required cleaning area to achieve full coverage of the working stroke.

[0015] S3. After the trolley travels to the front end point, it begins to return. During the return, the pendulums on both sides of the scraper contact the impact ruler. Under the guidance of the impact ruler, the pendulums flip and lift the scraper. After the scraper is lifted, it moves away from the accumulated material in the working stroke. When the trolley returns to the rear end point, the scraper is at the starting position of the scraping stroke.

[0016] S4. When the scraper is at the starting position of the scraping stroke, the pendulum and the impact ruler do not contact each other. The pendulum descends under the action of gravity and remains vertical. The blocking block on the pendulum does not contact the scraper. The scraper descends under the action of gravity and remains vertical, preparing for scraping.

[0017] S5. When the trolley moves forward, the scraper moves with it. The positioning block on the back of the scraper touches the trolley frame, allowing the scraper to move forward vertically and scrape the material. The trolley will return after reaching the previous endpoint, forming a cycle.

[0018] Beneficial effects: This reciprocating, step-by-step scraper and cleaning method, through the use of the reciprocating, step-by-step scraper, can sweep the falling material step by step, and after one reciprocating cycle, the falling material can be swept into the hopper chute. At the same time, the reciprocating, step-by-step scraper of this invention has a compact mechanism, and the various moving parts use dissimilar metals for fitment, effectively avoiding the problem of metal-on-metal seizing. It can meet the special working conditions of the metallurgical industry, such as the humid and narrow space at the conveyor head area, and the simultaneous transportation of multiple types of ores such as powder and lump ore. Maintenance is simple and convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a reciprocating, step-by-step scraper used in the narrow space of a bulk ore conveyor.

[0020] Figure 2 This is a schematic diagram of the drive unit;

[0021] Figure 3 This is a structural schematic diagram of the trolley device;

[0022] Figure 4 , 5 This is a schematic diagram of the positioning device;

[0023] Figure 6 This is a diagram showing the scraper in the raised state.

[0024] In the picture:

[0025] 1. Drive unit; 2. Trolley unit; 3. Positioning device; 11. Three-in-one driver; 12. Base; 13. Crank; 14. Connecting rod; 15. Pin; 16. Swing arm; 17. Push rod; 21. Trolley frame; 22. Horizontal wheel; 23. Trolley wheel; 24. Scraper; 25. Rotating shaft; 26. Pendulum; 27. Rail sweeper; 28. Positioning block; 29. ​​Blocking block; 31. Guide rail; 32. Fixing frame; 33. Impact ruler; 34. Baffle. Detailed Implementation

[0026] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figure 1 As shown, a reciprocating step-by-step scraper for use in narrow spaces in a bulk ore conveyor includes a drive unit 1, a trolley unit 2, and a positioning device 3.

[0029] Among them, such as Figure 2 As shown, the drive unit includes a base 12 for mounting and positioning the drive unit. A three-in-one driver 11 for providing power to the system is mounted on the base. A crank 13 is mounted on the three-in-one driver, and a connecting rod 14 is mounted on the other end of the crank 13. A rocker arm 16 is mounted on the other end of the connecting rod 14, and the rocker arm 16 is mounted on the base 12 via a pin 15. Furthermore, a push rod 17 is mounted on the long end of the rocker arm, and the push rod 17 is connected to the trolley device 2.

[0030] Among them, such as Figure 3 , 4 As shown, the trolley device 2 includes a trolley frame 21, which is connected to the push rod 17. The trolley frame 21 has four small wheels 23, four horizontal wheels 22, and four sets of rail sweepers 27 mounted at its four corners. Several sets of scrapers 24 are evenly spaced on the trolley frame 21, and the scrapers 24 are mounted on the trolley frame 21 via a rotating shaft 25. Furthermore, a positioning block 28 is mounted on the back of the scraper 24. When the scraper 24 is perpendicular to the ground, the positioning block 28 presses against the trolley frame 21, ensuring the scraper 24 remains vertical under force. Furthermore, a pendulum 26 is mounted at each end of the scraper 24, and a blocking block 29 is mounted on the pendulum 26. The blocking block 29 is located on the back of the scraper 24 and contacts the scraper 24. When the pendulum 26 swings in the opposite direction, the blocking block 29 moves away from the scraper 24, and the scraper 24 remains perpendicular to the ground. Furthermore, when the pendulum 26 swings forward, the blocking block 29 causes the scraper 24 to lift up and move away from the ground, allowing the scraper 24 to achieve a unidirectional swing function. The direction in which the pendulum 26 swings toward the head of the trolley device 2 is forward, and the direction in which it swings toward the tail of the trolley device 2 is reverse.

[0031] The four small wheels 22 on the trolley device 2 are used to keep the trolley frame 21 moving horizontally back and forth, and the four horizontal wheels 22 are used to keep the trolley frame 21 moving in a straight line back and forth. The rail sweeper 27 is used to clean the accumulated material on the guide rail to prevent the accumulated material from obstructing the movement of the trolley device.

[0032] Among them, such as Figure 4 , 5 As shown, the positioning device 3 includes a guide rail 31 for the horizontal reciprocating movement of the trolley device 2, and a fixed frame 32 for positioning and installing the positioning device 2 on the belt conveyor. The positioning device 3 has several sets of impact rulers 33 that cooperate with the pendulum 26, and baffles 34 installed on both sides to prevent loose ore from spilling out when the scraper is scraping material.

[0033] A reciprocating, step-by-step material cleaning method employs the aforementioned reciprocating, step-by-step scraper to clean and recycle accumulated material in stages. The specific implementation is as follows:

[0034] S1. The reciprocating step-by-step scraper is installed below the head area of ​​the belt conveyor. The crank 13 of the drive unit 1 rotates continuously under the drive of the three-in-one driver 11, causing the connecting rod 14 and the swing rod 16 to swing. When the swing rod 16 swings, it pushes and pulls the trolley frame 21 to reciprocate on the guide rail 31. After the crank 13 rotates one revolution, the trolley frame 21 moves forward to the front end point and then returns to the rear end point.

[0035] S2. When the trolley moves forward, it drives the vertically positioned scraper 24 forward, scraping away the accumulated material within its stroke and carrying it to the stroke range of the next scraper 24. The next scraper 24 then scrapes away the material as it returns and moves forward again. The last scraper 24 directly scrapes the accumulated material into the chute for discharge, achieving a step-by-step cleaning and recycling effect. The stopping position of the front scraper 24 and the starting stroke position of the rear scraper 24 have an overlap range of 100~150mm to avoid missing material. The working stroke of each set of scrapers 24 is 800~1000mm. Several sets of scrapers 24 can be stacked according to the required cleaning area to achieve full coverage of the working stroke.

[0036] S3. After the trolley travels to the front end point, it begins to return. When returning, the pendulum 26 on both sides of the scraper 24 contacts the impact ruler 33. Under the guidance of the impact ruler 33, the pendulum 26 flips. The blocking block 29 on the pendulum 26 lifts the scraper 24 away from the accumulated material in the working stroke. When the trolley returns to the rear end point, the scraper 24 is at the starting position of the scraping stroke.

[0037] S4. When the scraper 24 is at the starting position of the scraping stroke, this position is the empty area of ​​the impact ruler 33. The pendulum 26 does not contact the impact ruler 33. The pendulum 26 flips under the action of gravity and remains in a vertical state. At the same time, the scraper 24 flips under the action of gravity and remains in a vertical state, preparing for scraping.

[0038] S5. When the trolley moves forward, the scraper 24 moves with the trolley. The positioning block 28 on the back of the scraper 24 touches the trolley frame, allowing the scraper to move forward in a vertical state and scrape the material. After the trolley reaches the previous endpoint, it will return, forming a cycle.

[0039] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A reciprocating, step-by-step scraper for use in confined spaces in bulk ore conveyors, characterized in that, Includes a drive unit, a trolley unit, and a positioning unit; The drive unit includes a base for mounting and positioning the drive unit. A three-in-one drive unit for providing power to the system is mounted on the base. The three-in-one drive unit has a crank, with a connecting rod at one end. A rocker arm is mounted at the other end of the connecting rod, and the rocker arm is mounted on the base via a pin. A push rod is mounted on the long end of the rocker arm, and the push rod is connected to the trolley device. The trolley device includes a trolley frame connected to the push rod. Four small wheels, four horizontal wheels, and four sets of rail sweepers are mounted at the four corners of the trolley frame. Several sets of scrapers are evenly spaced on the trolley frame, and the scrapers are mounted on the trolley frame via a rotating shaft. The positioning device includes a guide rail for the horizontal reciprocating movement of the trolley device, used to position and install the positioning device on the fixed frame of the belt conveyor.

2. The reciprocating step-by-step scraper for use in narrow spaces in a bulk ore conveyor according to claim 1, characterized in that, The scraper is equipped with a positioning block on the back. When the scraper is perpendicular to the ground, the positioning block presses against the trolley frame, so that the scraper can remain vertical when subjected to force.

3. The reciprocating step-by-step scraper for use in narrow spaces in a bulk ore conveyor according to claim 1, characterized in that, Each end of the scraper is equipped with a set of pendulums, and each pendulum is equipped with a blocking block. The blocking block is on the back of the scraper and contacts the scraper. When the pendulum swings in the opposite direction, the blocking block moves away from the scraper and the scraper is perpendicular to the ground. When the pendulum swings in the forward direction, the blocking block drives the scraper to lift up and move away from the ground, so that the scraper can achieve a unidirectional swing function.

4. The reciprocating step-by-step scraper for use in narrow spaces in a bulk ore conveyor according to claim 3, characterized in that, The positioning device has several sets of impact gauges used in conjunction with the pendulum, and baffles installed on both sides to prevent loose ore from spilling out when the scraper is scraping material.

5. A method for cleaning materials using a reciprocating, step-by-step scraper for narrow spaces in a bulk ore conveyor as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1. The reciprocating step-by-step scraper is installed below the head area of ​​the belt conveyor. The crank of the drive unit rotates continuously under the drive of the three-in-one driver, which drives the connecting rod and the swing arm to swing. When the swing arm swings, the push and pull trolley frame moves back and forth on the guide rail. After the crank rotates once, the trolley frame moves forward to the front end point and then returns to the rear end point. S2. When the trolley moves forward, it drives the vertical scraper forward and scrapes away the accumulated material within its stroke, and brings it to the stroke range of the next scraper section. When the next scraper section returns and moves forward again, it scrapes away the material. The last scraper scrapes the accumulated material into the chute and discharges it. S3. After the trolley travels to the front end point, it begins to return. During the return, the pendulums on both sides of the scraper contact the impact ruler. Under the guidance of the impact ruler, the pendulums flip and lift the scraper. After the scraper is lifted, it moves away from the accumulated material in the working stroke. When the trolley returns to the rear end point, the scraper is at the starting position of the scraping stroke. S4. When the scraper is at the starting position of the scraping stroke, the pendulum and the impact ruler do not contact each other. The pendulum descends under the action of gravity and remains vertical. The blocking block on the pendulum does not contact the scraper. The scraper descends under the action of gravity and remains vertical, preparing for scraping. S5. When the trolley moves forward, the scraper moves with it. The positioning block on the back of the scraper touches the trolley frame, allowing the scraper to move forward vertically and scrape the material. The trolley will return after reaching the previous endpoint, forming a cycle.

6. The cleaning method according to claim 5, characterized in that, In step S2, the stop position of the front scraper and the starting stroke position of the rear scraper have an overlap range of 50~100mm to avoid missing material. The working stroke of each scraper is 800~1000mm. Several scraper groups are stacked according to the required cleaning area to achieve full coverage of the working stroke.

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