A hierarchical fitting type air section cleaner

Abstract

This utility model relates to the technical field of conveyor belt cleaners for belt conveyors, and discloses a graded, conforming empty section cleaner, including a cleaner body. The cleaner body includes multiple sets of scraper frames arranged front and rear on the surface of the conveyor belt. The scraper frames are movably connected to an upper intermediate frame and adaptively conform to the conveyor belt surface through their own weight. This utility model, through the combined use of the first and second scraper frames, can adaptively maintain the conforming state and conforming force with the conveyor belt according to changes in the conveyor belt surface and vibration amplitude, greatly improving the cleaning effect of the cleaner on the transition section of the conveyor belt and significantly enhancing cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of belt cleaners for belt conveyors, and in particular to a graded and fitting empty section cleaner. Background Technology

[0002] Belt conveyors are the core equipment for continuous bulk material transportation. In the conveyor system, the cleanliness of the conveyor belt on the return section is a key factor in maintaining stable operation of the equipment: the accumulation of residual materials not only aggravates belt wear and increases energy consumption, but may also lead to belt misalignment, idler jamming and other malfunctions, and in severe cases, even fire or mechanical damage.

[0003] The conveyor belt in the return section, located between the V-shaped idler group and the drums (tail drum and redirecting drum), is the transition section conveyor belt. Existing empty section cleaners for cleaning the return section conveyor belt typically use a single rigid scraper, whose linear contact surface is only suitable for the conveyor belt on the parallel idler group. For the transition section conveyor belt, due to the abrupt geometric change in the support surface at the bottom of the conveyor belt, the local curvature of the conveyor belt changes, resulting in a gap (the gap value can reach 1-3mm) between the scraper and the conveyor belt. This insufficient contact with the conveyor belt makes it impossible to effectively remove residual material from the surface of the conveyor belt, leading to a large accumulation of residual material and affecting the safe operation of the belt conveyor. In addition, the conveyor belt will generate a certain amount of vertical vibration during operation, and the existing empty section cleaner lacks an adaptive adjustment mechanism, which cannot adaptively maintain the contact state and contact force with the conveyor belt according to the vibration amplitude. Furthermore, the rigid contact mode will aggravate scraper wear when the conveyor belt vibrates upward, and increase the gap with the scraper when it vibrates downward, further reducing cleaning efficiency. Utility Model Content

[0004] To overcome the problems of insufficient fit between existing empty section cleaners and the conveyor belt in the transition section, and the inability to overcome the impact of conveyor belt vibration, this utility model provides a graded fit empty section cleaner. By using the cooperation of the first scraper and the second scraper, it can adapt to changes in the conveyor belt surface and vibration amplitude to maintain a fit and strength with the conveyor belt, greatly improving the cleaning effect of the cleaner on the conveyor belt in the transition section and improving cleaning efficiency.

[0005] The technical solution of this utility model is as follows:

[0006] A graded, fitting empty section cleaner includes a cleaner body, which includes multiple sets of scraper frames arranged front and rear on the surface of the conveyor belt. The scraper frames are movably connected to an upper intermediate frame and adaptively fit the surface of the conveyor belt by cooperating with their own weight.

[0007] Compared with existing technologies, the beneficial effects of this technical solution are as follows:

[0008] Because the conveyor belt surface is equipped with multiple sets of scraper frames, the conveyor belt can pass through each set of scraper frames in sequence when the scraper frames are working. The conveyor belt is cleaned multiple times, improving its cleanliness. Since each set of scraper frames is movably connected to the intermediate frame above, and the scraper frames have a certain self-weight, they can adaptively adjust according to the curvature changes of the conveyor belt surface, and fit the conveyor belt surface in stages, improving the fit with the conveyor belt surface, increasing the cleanliness of the conveyor belt surface in the cleaning transition section, and avoiding the accumulation of a large amount of material that would affect the safe operation of the belt conveyor.

[0009] Preferably, the cleaner body is installed on the conveyor belt in the transition section between the tail roller and the redirecting roller of the conveyor, including two sets of scraper frames at the front and rear, and is movably connected to the intermediate frame through the head bracket and the tail bracket.

[0010] Its beneficial effect is that this structure can further improve the cleanliness of the conveyor belt surface in the cleaning transition section of the sweeper.

[0011] In a further preferred embodiment, the two sets of scraper frames are respectively the first scraper frame and the second scraper frame, the first scraper frame is an angular structure, and the second scraper frame is a structure that cooperates with the first scraper frame.

[0012] Its beneficial effects are as follows: by setting the first and second scraper racks to this structure, the scraping ability of the scraper rack can be improved, and the effect of diverting residual materials can be achieved.

[0013] More preferably, the head of the second scraper extends into the included angle of the first scraper, and its head is connected to the tail of the first scraper through a connecting plate; the first and second scrapers form a lever structure under the action of the connecting plate, and their orientation is opposite to the running direction of the conveyor belt; the tail of the second scraper extends outward beyond the conveyor belt.

[0014] Its beneficial effects are as follows: the first scraper and the second scraper form an interactive graded cleaner, and together with their own weight, they can adaptably fit the conveyor belt in the transition section, achieving a better cleaning effect; the heads of the two are directly facing the running direction of the conveyor belt, which can achieve a better diversion and cleaning effect.

[0015] More preferably, the two connecting plates are symmetrically arranged along the centerline of the second scraper; the connecting plate is a horizontally arranged L-shaped structure, one side plate is fixedly connected to the first scraper, the connecting hole of the other side plate is sleeved on the horizontally outward support point of the second scraper, and the other side plate is also connected to the second scraper through a vertically arranged connecting column, the top of the connecting column passes through the top seat of the connecting plate, and the bottom end is fixed on the base of the second scraper. A compression spring is sleeved on the connecting column, and the upper and lower ends of the compression spring abut against the top seat and the base respectively.

[0016] Its beneficial effects are as follows: This structure and connection method can form a lever structure, and under the influence of the elastic force of the compression spring, it can better adapt to the changes in the surface of the conveyor belt and adaptively fit the conveyor belt; through the energy storage and release effect of the compression spring, it can also dynamically compensate for the amplitude of the conveyor belt, so that the scraper at this point can maintain a constant contact pressure of 0.05-0.15MPa with the surface of the conveyor belt even when the conveyor belt floats up and down by ±5mm, which is more conducive to cleaning the residual material on the surface of the conveyor belt.

[0017] More preferably, the head bracket includes a head fixing rod and a head movable rod. The head fixing rod is horizontally fixed between the intermediate frames on both sides. One end of the head movable rod is hinged to the head fixing rod, and the other end extends downward and is hinged to the head of the second scraper.

[0018] Its beneficial effect is that this connection method, in conjunction with the connecting plate, is more conducive to adapting to and fitting the conveyor belt surface with the second scraper.

[0019] More preferably, the tail bracket includes a tail fixed rod and a tail movable rod. The tail fixed rod is horizontally fixed between the two intermediate frames. One end of the tail movable rod is hinged to the tail fixed rod, and the other end extends downward and is hinged to the tail of the second scraper. There are two tail movable rods, and the bottom ends of the two tail movable rods are simultaneously hinged to the connecting rod at the tail of the second scraper. A reinforcing rib is also fixed between the connecting rod and the head of the second scraper.

[0020] Its beneficial effects are as follows: both ends of the second scraper are hinged to the middle frame, which further improves the fit between the second scraper and the conveyor belt surface; the hinges at the head and tail of the second scraper together form a three-point support structure, ensuring the dynamic stability of the scraper in the direction of the conveyor belt.

[0021] More preferably, an adjustment device is provided between the middle of the head movable rod and the head of the first scraper, one end of which is hinged to the head movable rod, and the other end extends vertically downward to connect with the first scraper.

[0022] Its beneficial effects are as follows: the adjustment device, the hinge method, and the self-weight cooperation with the first scraper can maintain the contact state and contact force with the conveyor belt according to the changes in the surface of the conveyor belt and the vibration amplitude of the conveyor belt. It can adaptively adjust the sinking degree of the first scraper and the contact pressure with the surface of the conveyor belt, so as to better contact with the surface of the conveyor belt and achieve a better cleaning effect.

[0023] More preferably, the adjusting device includes a screw, an adjusting spring, and a preload nut. The adjusting spring and the preload nut are sleeved on the screw, and the top end of the adjusting spring abuts against the preload nut. The top end of the screw is hinged to the head movable rod, and the bottom end passes through the head of the first scraper, so that the position of the preload nut on the screw can be adjusted up and down, and the elastic force of the adjusting spring when compressed can be adjusted.

[0024] Its beneficial effects are as follows: by adjusting the elastic force of the adjusting spring during compression, the first scraper can dynamically compensate for the belt amplitude and improve the adhesion to the conveyor belt surface, thereby improving scraping efficiency.

[0025] More preferably, the scraper frame is fixed with a hanging plate, which is arranged along the outer side of the scraper frame; the side of the scraper frame is evenly arranged with a number of elongated holes along its length, each elongated hole is arranged vertically, and the hanging plate is fixedly connected to the scraper frame by fasteners passing through the elongated holes and the connection position with the scraper frame can be adjusted up and down through the elongated holes; the hanging plate is made of polyurethane scraper plate.

[0026] Its beneficial effect is that the position of the hanging plate can be adjusted up and down within the adjustment range of the long hole, so that it can effectively contact the conveyor belt. Attached Figure Description

[0027] This utility model will be described with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the A-direction structure;

[0030] Figure 3 This is a three-dimensional structural diagram of the first scraper of this utility model;

[0031] Figure 4 This is a three-dimensional structural diagram of the second scraper of this utility model;

[0032] Figure 5 This is a schematic diagram of the connecting plate of this utility model;

[0033] Figure 6 This is a schematic diagram of the connection structure of the connecting plate of this utility model;

[0034] Figure 7 This is a schematic diagram of the connection structure of the adjusting device of this utility model;

[0035] Figure 8 This is a schematic diagram of the connection structure between the hanging plate and the scraper frame of this utility model.

[0036] Reference numerals: First scraper 1, head bracket 11, head fixing rod 111, head movable rod 112, mounting hole 12, second scraper 2, tail bracket 21, tail fixing rod 211, tail movable rod 212, fulcrum 22, base 23, connecting column 24, compression spring 241, connecting rod 25, reinforcing rib 26, connecting plate 3, mounting seat 31, connecting hole 32, top seat 33, screw 41, adjusting spring 42, preload nut 43, hanging plate 5, pin 6, support 7, side arm 8, elongated hole 81. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] Example 1: As Figures 1 to 8 The illustrated graded and fitted empty section cleaner includes a cleaner body, which includes multiple sets of scraper frames arranged front and back on the surface of the conveyor belt. That is, the multiple sets of scraper frames are arranged front and back along the length of the conveyor belt surface to form a graded structure cleaner, which fits into the conveyor belt surface in stages. The conveyor belt surface can be cleaned by multiple scraper frames. Each set of scraper frames is movably connected to the upper intermediate frame and adaptively fits into the conveyor belt surface by cooperating with the self-weight of the scraper frame.

[0039] Because the conveyor belt surface is equipped with multiple sets of scraper frames, the conveyor belt can pass through each set of scraper frames in sequence when the scraper frames are working. The conveyor belt undergoes multiple cleanings, improving cleanliness. Since each set of scraper frames is movably connected to the intermediate frame above, and the scraper frames have a certain self-weight, they can adaptively adjust according to the curvature changes of the conveyor belt surface and fit the conveyor belt surface in stages, improving the fit between the scraper frames and the conveyor belt surface. This increases the cleanliness of the conveyor belt surface in the transition section cleaned by the cleaner, and avoids the accumulation of a large amount of material, which would affect the safe operation of the belt conveyor.

[0040] Example 2: Based on Example 1, the location of the cleaner body is optimized. The cleaner body is set on the transition section of the conveyor belt between the V-shaped idler roller group and the drum of the conveyor, including two sets of scraper frames, front and rear, and is movably connected to the intermediate frame through the head bracket 11 and the tail bracket 21. This structure can further improve the cleanliness of the conveyor belt surface in the transition section cleaned by the cleaner.

[0041] Preferably, the front and rear scraper frames are respectively the first scraper frame 1 and the second scraper frame 2, such as... Figures 3 to 4 As shown, the first scraper 1 is a 45° angled structure, including two side arms 8 connected to the same end. The second scraper 2 is a structure that cooperates with the first scraper 1, and can also be an angled structure or an isosceles trapezoidal structure, including two side arms 8 connected together. The weight of both the first scraper 1 and the second scraper 2 is 50KG. By setting the first scraper 1 and the second scraper 2 to the above structure, the scraping capacity of the scraper can be improved, and the effect of diverting residual material can be achieved.

[0042] Specifically, the head of the second scraper 2 extends into the angle between the first scraper 1 and the tail of the first scraper 1, and its head is connected to the tail of the first scraper 1 through two connecting plates 3 on both sides. That is, the side arms 8 of the first scraper 1 and the second scraper 2 are connected in parallel through the connecting plates 3 respectively. The first scraper 1 and the second scraper 2 can form a lever structure under the action of the connecting plates 3, and are movably connected to the intermediate frame. The two form an interactive graded sweeper, which, together with their own weight, realizes the graded adaptive fit of the conveyor belt of the transition section, achieving a better sweeping effect.

[0043] Furthermore, the first scraper 1 and the second scraper 2 are oriented opposite to the direction of the conveyor belt's movement, meaning their heads face the direction of the conveyor belt's movement, achieving better diversion and cleaning effects. The tail of the side arm 8 of the second scraper 2 extends horizontally outward beyond the edge of the conveyor belt. During use, residual material on the transition section of the conveyor belt is scraped off by the first scraper 1 and then diverted to both sides of the second scraper 2, before being guided along both sides of the second scraper 2 to the outside of the conveyor belt, completing the cleaning of residual material on the surface of the conveyor belt. The first scraper 1 mainly scrapes off residual material in the central area of ​​the conveyor belt, while the second scraper 2 mainly scrapes off residual material near the center area and on both sides of the conveyor belt.

[0044] The specific connection structure and method between the first scraper rack 1 and the second scraper rack 2 are as follows: Two connecting plates 3 on both sides of the first scraper rack 1 and the second scraper rack 2 are symmetrically arranged along the center line of the second scraper rack 2 to ensure uniform material adhesion. For example... Figures 1 to 6As shown, each connecting plate 3 is an L-shaped structure formed by bending Q345B steel plate and is arranged horizontally. One side of the connecting plate 3 has a horizontally extending outward mounting base 31 (i.e., a perforated mounting plate) at the top of its movable end. This mounting base 31 extends into the inner side of the first scraper 1 and is fixedly connected to the mounting hole 12 on the top surface of the first scraper 1 by bolts. The other side of the connecting plate 3 has a connecting hole 32. A horizontally extending fulcrum 22 is fixed at a corresponding position on the outer side of the second scraper 2. This fulcrum 22 is a cylindrical structure that horizontally passes through the second scraper 2. The connecting hole 32 is fitted onto the fulcrum 22 and can rotate around it. The other side of the connecting plate 3 has an inwardly extending top seat 33 (a perforated mounting plate) at the top of its movable end. A horizontally outward-protruding base 23 is provided at the corresponding position at the bottom. A vertically upward-protruding connecting column 24 is integrally connected to the center of the base 23. The connecting column 24 extends upward and passes through the top seat 33. A compression spring 241 is fitted on the column. The upper and lower ends of the compression spring 241 abut against the top seat 33 and the base 23, respectively. The fulcrum 22 is located between the mounting seat 31 and the top seat 33. The two side plates of the connecting plate 3 can move up and down around the fulcrum 22 according to the changes in the surface of the conveyor belt, forming a lever structure. At the same time, it drives the first scraper 1 and the second scraper 2 to float up and down adaptively. Under the influence of the elastic force of the compression spring 241, it can better adapt to the changes in the surface of the conveyor belt and adaptively fit the conveyor belt.

[0045] The compression spring 241 has an elastic coefficient ranging from 50 to 200 N / mm and can be adjusted up and down within a stroke range of ±15 mm. It forms a lever ratio of 1:3 to 1:5 with the tension of the conveyor belt. Through the energy storage and release function of the compression spring 241, it can also dynamically compensate for the amplitude of the conveyor belt. This allows the scraper at this location to maintain a constant contact pressure of 0.05-0.15 MPa with the surface of the conveyor belt even when the conveyor belt fluctuates up and down by ±5 mm, which is more conducive to cleaning the residual material on the surface of the conveyor belt.

[0046] Example 3: Based on the above examples, a preferred design is made, such as... Figures 1 to 2 As shown, the head bracket 11 includes a head fixing rod 111 and a head movable rod 112. The head fixing rod 111 is horizontally fixed between the two intermediate frames and is fixedly connected to the support 7 on the intermediate frame. The support 7 is formed by bending steel plate, and its top is fixedly connected to the intermediate frame by bolts. The two ends of the head fixing rod 111 pass through the side of the support 7 and are fixedly connected to it by bolts. One end of the head movable rod 112 is hinged to the middle of the head fixing rod 111 by a pin 6, and the other end extends downward and is hinged to the head of the second scraper 2 by a pin 6. This connection method, in conjunction with the connecting plate 3, is more conducive to adapting to the conveyor belt surface of the second scraper 2.

[0047] Furthermore, the tail support 21 includes a tail fixed rod 211 and a tail movable rod 212. The tail fixed rod 211 is horizontally fixed between the two intermediate frames and is fixedly connected to the support 7 on the intermediate frame. The support 7 is formed by bending steel plate, and its top is fixedly connected to the intermediate frame by bolts. The two ends of the tail fixed rod 211 pass through the side of the support 7 and are fixedly connected to it by bolts. One end of the tail movable rod 212 is hinged to the tail fixed rod 211 by a pin 6, and the other end extends downward and is hinged to the tail of the second scraper 2 by a pin 6. Thus, both ends of the second scraper 2 are hinged to the intermediate frame, which further improves the fit between the second scraper 2 and the conveyor belt surface. Preferably, there are two tail movable rods 212. The tail of the second scraper 2 is fixed with a connecting rod 25 connecting the two side arms 8. The bottom ends of the two tail movable rods 212 are simultaneously hinged to the connecting rod 25 through a pin 6. Thus, the hinge points at the head and tail of the second scraper 2 together form a three-point support structure to ensure the dynamic stability of the scraper in the direction of the conveyor belt. A reinforcing rib 26 is also fixed between the connecting rod 25 and the head of the second scraper 2. The reinforcing rib 26 connects the middle of the head and tail ends of the second scraper 2, which can improve the rigidity and deformation resistance of the second scraper 2 and achieve strength optimization.

[0048] Furthermore, such as Figure 1 and Figure 6 An adjustment device is provided between the middle of the head movable rod 112 and the head of the first scraper 1. One end of the adjustment device is hinged to the head movable rod 112 to form an adjustable tension connection. The other end of the adjustment device extends vertically downward and is connected to the first scraper 1. The adjustment device, the hinge method, and the weight of the first scraper 1 work together to enable the first scraper 1 to maintain a close fit and contact force with the conveyor belt according to the changes in the surface of the conveyor belt and the vibration amplitude of the conveyor belt. The degree of sinking of the first scraper 1 and the contact pressure with the surface of the conveyor belt are adaptively adjusted to better fit with the surface of the conveyor belt and achieve a better cleaning effect.

[0049] Specifically, the adjusting device includes a screw 41, an adjusting spring 42, and a preload nut 43. The adjusting spring 42 and the preload nut 43 are sleeved on the screw 41. The top and bottom ends of the adjusting spring 42 abut against the preload nut 43 and the head surface of the first scraper 1, respectively. The top end of the screw 41 is hinged to the head movable rod 112 via a pin 6, and the bottom end passes downward through the head of the first scraper 1. The displacement is restricted by the sleeved nut to prevent the first scraper 1 from detaching from the screw 41. The position of the preload nut 43 on the screw 41 can be adjusted up and down, and the elastic force of the adjusting spring 42 during compression can be adjusted. The first scraper 1 can float up and down within the limitation range of the adjusting spring 42 to adapt to changes in the surface of the conveyor belt. In use, adjust the elasticity of the adjusting spring 42 to make the initial contact pressure between the first scraper 1 and the surface of the conveyor belt reach 150-200N, ensuring a preload of 0.5-1.5mm. Then, according to the vibration frequency of the conveyor belt (3-8Hz), adjust the position of the preload nut 43 to outside the resonance zone, so that the first scraper 1 can dynamically compensate for the belt amplitude and improve the adhesion to the surface of the conveyor belt, thereby improving the scraping efficiency.

[0050] Example 4: Based on the above examples, the design of the hanging plate 5 is optimized, such as... Figure 1 and Figure 8 As shown, a hanging plate 5 is fixed to the scraper frame. The hanging plate 5 is arranged along the outer side of the scraper frame, that is, the outer sides of both arms 8 of the first scraper frame 1 and the second scraper frame 2 are provided with hanging plates 5. Specifically, several elongated holes 81 are arranged along the length of the sides of both arms 8 of the first scraper frame 1 and the second scraper frame 2. Each elongated hole 81 is arranged vertically. The hanging plate 5 is fixedly connected to the side arm 8 by fasteners passing through the elongated holes 81. The connection position with the scraper frame can be adjusted up and down through the elongated holes 81. The fasteners can be bolts and nuts that fit together. The position of the hanging plate 5 can be adjusted up and down within the adjustment range of the elongated holes 81 to ensure effective contact with the conveyor belt. The hanging plate 5 is made of polyurethane scraper plate, which can efficiently clean residual materials on the surface of the conveyor belt. It has the advantages of high durability, wide applicability, wear resistance and no damage to the surface of the conveyor belt.

[0051] When cleaning the conveyor belt of the transition section using the cleaner of this application, the first scraper 1 is in front and the second scraper 2 is behind, with the conveyor belt passing through the two scrapers in the opposite direction of its operation. The conveyor belt passing the head of the first scraper 1 is closer to the V-shaped idler group, with a downward indentation in the middle forming a recess. However, since it is on the conveyor belt of the transition section, this recess is shallow. The head of the first scraper 1 is pointed and hinged to the head bracket 11. Utilizing the weight of the first scraper 1, and adjusting the spring force of the adjusting device 42, and finally adjusting the position of the hanging plate 5 downwards according to the site conditions, the initial contact pressure between the first scraper 1 and the surface of the conveyor belt of the transition section reaches 150-200N, ensuring a pre-compression of 0.5-1.5mm. Therefore, during formal cleaning operation, the hanging plate 5 of the first scraper 1 can adaptively maintain a tight contact with the center area of ​​the conveyor belt surface of the transition section. The first scraper 1 and the second scraper 2 are used in a close-fitting state, and the elasticity of the adjusting spring 42 can be dynamically compensated for the amplitude of the conveyor belt, overcoming the influence of the conveyor belt amplitude. The conveyor belt is closer to the roller after passing the second scraper 2, where the conveyor belt is nearly parallel. Through the use of the connecting plate 3 forming a lever structure with the compression spring 241, the hinge structure at the head and tail of the second scraper 2, and the self-weight of the second scraper 2, the hanging plate 5 of the second scraper 2 can adaptably maintain a close fit with the surface of the conveyor belt near the center and the sides during the actual cleaning operation. It can also dynamically compensate for the amplitude of the conveyor belt through the energy storage and release effect of the compression spring 241, overcoming the influence of the conveyor belt amplitude. Thus, the combined use of the first scraper 1 and the second scraper 2 allows the cleaner to adapt to the changes in the surface of the conveyor belt and the vibration amplitude, and to maintain a graded fit with the surface of the conveyor belt, greatly improving the cleaning effect of the cleaner on the conveyor belt in the transition section and improving the cleaning efficiency.

[0052] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of this application, and these all fall within the scope of protection of this application.

Claims

1. A graded, fitted, gap-clearing cleaner, characterized in that: The system includes a sweeper body, which includes multiple scraper frames arranged front and rear on the surface of the conveyor belt. The scraper frame is movably connected to the intermediate frame above via a head bracket (11) and adapts to the surface of the conveyor belt by cooperating with its own weight. An adjustment device is provided between the head movable rod (112) of the head bracket (11) and the head of the first scraper frame (1). The adjustment device includes a screw (41), an adjusting spring (42), and a pre-tightening nut (43). The adjusting spring (42) and the pre-tightening nut (43) are sleeved on the screw (41). The top end of the adjusting spring (42) abuts against the pre-tightening nut (43). The top end of the screw (41) is hinged to the head movable rod (112), and the bottom end passes through the head of the first scraper frame (1).

2. The graded, fitted, gap-clearing cleaner according to claim 1, characterized in that: The cleaner body is set on the conveyor belt in the transition section between the V-shaped idler group and the drum of the conveyor, including two sets of scraper frames at the front and rear, and is movably connected to the intermediate frame through the head bracket (11) and the tail bracket (21).

3. The graded, fitted, gap-clearing cleaner according to claim 2, characterized in that: The front and rear scraper frames are the first scraper frame (1) and the second scraper frame (2), respectively. The first scraper frame (1) is an angular structure, and the second scraper frame (2) is a structure that cooperates with the first scraper frame (1).

4. A graded, fitted, gap-clearing cleaner according to claim 3, characterized in that: The head of the second scraper (2) extends into the angle of the first scraper (1), and its head is connected to the tail of the first scraper (1) through the connecting plate (3); the first scraper (1) and the second scraper (2) form a lever structure under the action of the connecting plate (3), and their orientation is opposite to the running direction of the conveyor belt; the tail of the second scraper (2) extends outward beyond the conveyor belt.

5. A graded, fitted, gap-clearing cleaner according to claim 4, characterized in that: Two connecting plates (3) are symmetrically arranged along the center line of the second scraper (2); the connecting plate (3) is a horizontally arranged L-shaped structure, one side plate is fixedly connected to the first scraper (1), and the connecting hole (32) of the other side plate is sleeved on the horizontally outward support point (22) of the second scraper (2), and the other side plate is also connected to the second scraper (2) through the vertically arranged connecting column (24). The top end of the connecting column (24) passes through the top seat (33) of the connecting plate (3), and the bottom end is fixed on the base (23) of the second scraper (2). A compression spring (241) is sleeved on the connecting column (24), and the upper and lower ends of the compression spring (241) abut against the top seat (33) and the base (23) respectively.

6. A graded, fitted, gap-clearing cleaner according to claim 2, characterized in that: The head bracket (11) includes a head fixing rod (111) and a head movable rod (112). The head fixing rod (111) is horizontally fixed between the intermediate frames on both sides. One end of the head movable rod (112) is hinged to the head fixing rod (111), and the other end extends downward to be hinged to the head of the second scraper (2).

7. A graded, fitted, gap-clearing cleaner according to claim 6, characterized in that: The tail bracket (21) includes a tail fixed rod (211) and a tail movable rod (212). The tail fixed rod (211) is horizontally fixed between the two intermediate frames. One end of the tail movable rod (212) is hinged to the tail fixed rod (211), and the other end extends downward and is hinged to the tail of the second scraper (2). There are two tail movable rods (212). The bottom ends of the two tail movable rods (212) are simultaneously hinged to the connecting rod (25) at the tail of the second scraper (2). A reinforcing rib (26) is also fixed between the connecting rod (25) and the head of the second scraper (2).

8. A graded, fitted, gap-clearing cleaner according to claim 6, characterized in that: The adjustment device is located between the middle of the head movable rod (112) and the head of the first scraper (1). One end of the adjustment device is hinged to the head movable rod (112), and the other end extends vertically downward to connect with the first scraper (1).

9. A graded, fitted, gap-clearing cleaner according to claim 8, characterized in that: The position of the preload nut (43) on the screw (41) can be adjusted up and down to adjust the elastic force of the adjusting spring (42) when compressed.

10. A graded, fitted gap cleaner according to any one of claims 1-9, characterized in that: The scraper is fixed with a hanging plate (5), which is arranged along the outer side of the scraper. The scraper has several long holes (81) evenly arranged along its length. Each long hole (81) is arranged vertically. The hanging plate (5) is fixedly connected to the scraper by fasteners passing through the long holes (81) and its connection position with the scraper can be adjusted up and down through the long holes (81). The hanging plate (5) is made of polyurethane scraper.

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