Scraper connecting structure and scraper cleaner

Abstract

The utility model discloses a scraper connecting structure and a scraper cleaning machine, and belongs to the technical field of belt conveyor cleaning equipment. The scraper blade connecting structure comprises a group of anchor chains which are oppositely arranged, wherein the anchor chain comprises a horizontal chain ring, a vertical chain ring and a connecting part; the connecting part comprises a transition chain ring which is horizontally arranged; the two ends of the transition chain rings are connected with the vertical chain rings in a sleeved mode respectively. A notch is formed in one side of the transition chain ring, and the two ends of the notch extend outwards to form transition parts respectively. A mounting space for clamping the end part of the scraper assembly is formed between the two transition parts; the vertical floating space of the horizontal chain rings and the transition chain rings in the vertical chain rings is 2-10 mm. By controlling the vertical floating space of the horizontal chain ring and the transition chain ring in the vertical chain ring, the overall floating amount of the scraper assembly is reduced as much as possible on the premise of ensuring that the anchor chain can rotate normally, so that the cleaning efficiency of the scraper assembly is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of belt conveyor cleaning equipment, and more specifically, it relates to a scraper connection structure and a scraper cleaning machine. Background Technology

[0002] Belt conveyors are widely used in modern large-scale industrial production for transporting materials. They feature high flow rates and uninterrupted operation, effectively ensuring the stability of industrial production. However, in actual production, due to various reasons, material often spills during the conveying process, wasting raw materials and hindering clean production. Traditionally, manual cleaning is often required, which increases labor costs. Furthermore, the limited space under the belt conveyor makes manual cleaning difficult and increases the risk of accidents.

[0003] To address the time-consuming, labor-intensive, and unsafe nature of manually cleaning material spills from belt conveyors, a series of scraper cleaners have emerged on the market, designed to replace manual labor in cleaning and collecting spilled material. The basic working principle of these scraper cleaners is that a drive source continuously rotates the conveyor chain, with scrapers evenly spaced along the chain. During operation, the scrapers, moving with the conveyor chain, scrape away the scattered material piece by piece, gradually gathering it for subsequent collection and processing. In practice, due to the unstable state of the raw materials, materials with high moisture content or excessively fine particles may clump together during long conveying processes. In such cases, because the conveyor chain itself has a certain degree of float, when the scrapers encounter clumped areas, they are easily lifted, making it impossible to clean the spilled material.

[0004] A search revealed that patent CN215665634U discloses a structure for a chain floater preventer for scraper conveyors. This application utilizes a chain floater to press down the scraper conveyor guide rail and press it tightly against the bottom surface of the scraper conveyor housing, thus resolving the potential hazards caused by the floating chain and significantly improving the efficiency of material conveying during production. However, the presence of this chain floater increases the complexity of the equipment structure. Furthermore, in some special cases, the scraper conveyor is positioned entirely below a belt conveyor, where space is limited (generally around 300mm). This significantly increases the difficulty of installing the chain floater. In some extreme spaces (height direction), sufficient installation space may not be available for the chain floater. Utility Model Content

[0005] 1. The problem to be solved

[0006] In view of at least some of the problems existing in the prior art, this utility model proposes a scraper connection structure and a scraper cleaning machine, the purpose of which is to reduce the overall floating amount of the scraper assembly to ensure the cleaning effect of the scraper.

[0007] 2. Technical Solution

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] The present invention provides a scraper connection structure, comprising a set of anchor chains arranged opposite each other; wherein, the anchor chains are formed by a plurality of horizontal chain links and vertical chain links sleeved together, and the anchor chains further include a connecting part for connecting the scraper assembly;

[0010] The connecting part includes a horizontally arranged transition chain link; both ends of the transition chain link are respectively sleeved with vertical chain links; a notch is opened on one side of the transition chain link, and the two ends of the notch extend outward to form a transition part; and an installation space is formed between the two transition parts for the end of the scraper assembly to be inserted; wherein,

[0011] The vertical floating space of the horizontal chain link and the transition chain link within the vertical chain link is 2-10mm, and the vertical floating space of the transition chain link within the vertical chain link is not greater than the vertical floating space of the horizontal chain link within the vertical chain link.

[0012] In some embodiments, the vertical floating space of the transition link within the vertical link is smaller than the vertical floating space of the horizontal link within the vertical link, and the difference between the two is 1-3 mm; wherein, the vertical floating space of the horizontal link within the vertical link is 4-8 mm.

[0013] In some embodiments, the diameter D3 of the transition link is greater than the diameter D2 of the horizontal link, and / or the aperture of the vertical link connected to the horizontal link is smaller than the aperture of the vertical link connected to the transition link.

[0014] In some embodiments, the length H1 of the notch on the transition chain is greater than the distance H2 between the two transition portions, and the two are connected by an arc segment.

[0015] This utility model also provides a scraper cleaning machine, including a frame, a drive assembly, and a scraper assembly; wherein, the drive assembly is mounted on the frame and includes a motor, a drive shaft, and a driven shaft; the drive shaft is provided with a drive sprocket, and the driven shaft is provided with a driven sprocket;

[0016] The drive assembly and the scraper assembly are connected by the scraper connection structure described above; wherein the anchor chain is wound around the drive sprocket and the driven sprocket; and the scraper assembly is connected to the connecting part.

[0017] In some embodiments, the frame includes a head frame, a middle frame, and a tail frame that are detachably connected; wherein the motor is disposed on the outside of the head frame;

[0018] The drive shaft is mounted inside the head frame via a drive shaft mount;

[0019] The driven shaft is mounted on the tail frame at one end away from the middle frame via a driven shaft seat; and the connecting bolts between the driven shaft seat and the tail frame are horizontally arranged.

[0020] In some embodiments, the tail frame consists of two hollow boxes located at the ends of the middle frame.

[0021] In some embodiments, the drive shaft seat is slidably disposed on the side plates on both sides of the tail frame, and the drive shaft seat is connected to a tensioning assembly.

[0022] The tensioning assembly adopts a worm gear structure; wherein, one end of the worm extends from the end of the head frame into the head frame and is connected to the drive shaft seat; the free end of the worm gear extends to the side of the head frame and is connected to a rotating handle.

[0023] In some embodiments, the scraper assembly includes a toothless scraper and / or a toothed scraper; wherein...

[0024] The toothless scraper includes a connecting plate and a scraper body arranged vertically; the end of the connecting plate is inserted into the mounting space of the connecting part; the end of the scraper body extends to the outer end of the transition chain link.

[0025] The toothed scraper includes two scraper bodies arranged in parallel and a connecting plate disposed between the two scraper bodies; one end of the connecting plate is inserted between the two scraper bodies, and the other end is inserted into the installation space of the connecting part; wherein, at least one end face of the scraper body is provided with anti-arch teeth, and the anti-arch teeth on the front and rear scraper bodies are arranged at the same height and staggered or aligned at different heights.

[0026] In some embodiments, the connecting plate and the scraper body are connected by welding or integral molding; the connecting plate and the transition portion are connected by bolts.

[0027] 3. Beneficial effects

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] (1) The scraper connection structure of this utility model controls the vertical floating space of the horizontal chain link and the transition chain link in the vertical chain link, so as to reduce the overall floating amount of the scraper assembly as much as possible while ensuring that the anchor chain can rotate normally, so as to ensure the cleaning efficiency of the scraper assembly.

[0030] (2) The scraper cleaning machine of this utility model can effectively reduce the overall height of the scraper cleaning machine by setting the driven shaft seat on the side of the tail frame, so as to be suitable for assembly operations in smaller height spaces; at the same time, it is also beneficial to reduce the impact wear on the connecting bolts.

[0031] (3) The scraper cleaning machine of this utility model uses a combination of toothless scrapers and toothed scrapers, and adopts a working method of breaking up the arch before cleaning, which can effectively avoid the floating chain phenomenon and ensure the cleaning effect. At the same time, by extending the length of the toothless scraper, the material under the anchor chain can be cleaned; and the double row of arch-breaking teeth on the toothed scraper further reduces the risk of floating chain and ensures the cleaning effect. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a scraper connection structure according to the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0034] Figure 3 This is a schematic diagram of the connecting part in this utility model;

[0035] Figure 4 This is a structural schematic diagram of a scraper cleaning machine according to the present invention;

[0036] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle;

[0037] Figure 6 This is a schematic diagram of the assembly between the driven shaft seat and the tail frame in this utility model;

[0038] Figure 7 for Figure 4 A magnified view of a portion of point C in the middle;

[0039] Figure 8 for Figure 4 A magnified view of a portion of point D in the middle;

[0040] Figure 9 This is a schematic diagram of a structure of the present invention with a toothed scraper;

[0041] Figure 10 This is a schematic diagram of another structure of the present invention that includes a toothed scraper;

[0042] Figure 11 This is a schematic diagram showing the contact between the arch-breaking tooth and the upper conveyor belt in this utility model.

[0043] In the diagram: 100, anchor chain; 110, horizontal link; 120, vertical link; 130, connecting part; 131, transition link; 132, transition part; 133, arc segment;

[0044] 200. Scraper assembly; 210. Connecting plate; 220. Scraper body; 230. Arch-breaking teeth;

[0045] 300, rack; 310, head rack; 320, middle rack; 330, tail rack;

[0046] 400. Drive assembly; 410. Motor; 420. Drive shaft; 430. Driven shaft; 440. Drive sprocket; 450. Driven sprocket; 460. Drive shaft housing; 470. Driven shaft housing; 480. Connecting bolt;

[0047] 500. Tensioning assembly. Detailed Implementation

[0048] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] The present invention will be further described below with reference to specific embodiments.

[0051] like Figure 1 As shown, a scraper connection structure in this embodiment includes a set of anchor chains 100 arranged opposite each other. The anchor chains 100 are generally ring-shaped structures formed by several chain links that are alternately nested horizontally and vertically. For ease of description below, the horizontally arranged chain links are divided into two categories: horizontal chain links 110 and connecting parts 130; the vertically arranged chain links are defined as vertical chain links 120. Among them, the horizontal chain links 110, as part of the anchor chains 100, are mainly used to connect the vertical chain links 120. The connecting parts 130, as part of the anchor chains 100, are not only used to connect the vertical chain links 120, but also serve to connect the scraper assembly 200 (which will be described in detail below).

[0052] Specifically, such as Figure 3As shown, the connecting portion 130 includes a transition link 131 and a transition portion 132. The transition link 131 is oriented in the same direction as the horizontal link 110, and its two ends are respectively sleeved with the vertical link 120. Simultaneously, a notch is formed on the side of the transition link 131 facing the scraper assembly 200, and each of the two ends of the notch extends outward to form a transition portion 132. An installation space is formed between the two transition portions 132 for the end of the scraper assembly 200 to engage.

[0053] Furthermore, the length H1 of the aforementioned gap is greater than the distance H2 between the two transition portions 132, and the transition chain 131 and the transition portion 132 are connected by an arc segment 133 to ensure the smoothness of the transition between the two.

[0054] To ensure the anchor chain 100 can rotate normally, it cannot be completely taut; a certain degree of slack is required. However, this slack makes the scraper assembly 200 susceptible to being lifted when encountering hardened material, thus affecting its cleaning effect. In actual use, it was found that during the lifting process, the scraper assembly 200 does not initially float upwards entirely; instead, the transition link 131 floats upwards first within the mounting hole of the vertical link 120, and only after reaching its designated position does it drive the entire anchor chain 100 upwards. In other words, the overall upward movement of the scraper assembly 200 includes not only the slack of the anchor chain 100 itself but also the movement of the transition link 131 within the vertical link 120. This undoubtedly increases the overall upward movement of the scraper assembly 200, which is clearly detrimental to its cleaning effect.

[0055] Therefore, in this embodiment, the vertical floating space of the horizontal chain link 110 and the transition chain link 131 within the vertical chain link 120 is controlled to be 2-10mm, for example, 3mm, 5mm, 7mm, 9mm, etc., so as to minimize the floating amount of the transition chain link 131 within the vertical chain link 120 while ensuring that the anchor chain 100 can rotate normally.

[0056] Furthermore, the vertical floating space of the transition link 131 within the vertical link 120 is smaller than the vertical floating space of the horizontal link 110 within the vertical link 120, and the difference between the two is 1-3 mm, for example, 1.5 mm, 2.0 mm, 2.5 mm, etc. Preferably, the vertical floating space of the horizontal link 110 within the vertical link 120 is 4-8 mm, while the vertical floating space of the transition link 131 within the vertical link 120 is 2-5 mm.

[0057] It should be noted that the aforementioned vertical floating space is the maximum distance that the transition link 131 or the horizontal link 110 can move vertically within the mounting hole of the vertical link 120. That is, the difference between the hole diameter of the vertical link 120 and the diameter of the transition link 131 / horizontal link 110.

[0058] refer to Figure 2 As shown, in some embodiments, the horizontal link 110 and the vertical link 120 have the same dimensions; that is, the horizontal link 110 and the vertical link 120 are the same link, only their orientation is different. In this case, the aperture of the vertical link 120 is the same as the aperture D1 of the horizontal link 110. The diameter D3 of the transition link 131 can be slightly larger than the diameter D2 of the horizontal link 110, for example, about 2 mm, to reduce the vertical floating space of the transition link 131.

[0059] In other embodiments, the horizontal link 110 and the transition link 131 have the same dimensions; in this case, the aperture of the vertical link 120 connected to the transition link 131 can be made slightly smaller, which can also reduce the vertical floating space of the transition link 131. Of course, the above two embodiments can be used in combination.

[0060] Specifically, the different apertures of the vertical link 120 can be implemented in two ways. For ease of description, a vertical link 120 connected to the horizontal link 110 at both ends is defined as the first vertical link; a vertical link 120 connected to the horizontal link 110 at one end and the transition link 131 at the other end is defined as the second vertical link. In one embodiment, the aperture of the first vertical link is larger than that of the second vertical link. In another embodiment, the aperture of the second vertical link is gradually changed, that is, the portion connected to the horizontal link 110 is larger than the portion connected to the transition link 131.

[0061] The scraper connection structure of this embodiment reduces the vertical floating amount of the transition chain link 131 within the mounting hole of the vertical chain link 120, thereby minimizing the overall floating amount of the scraper assembly 200 and effectively ensuring the cleaning efficiency of the scraper assembly 200.

[0062] like Figure 4 , Figure 5 As shown, this embodiment also provides a scraper cleaning machine, which includes a frame 300, a drive assembly 400, and a scraper assembly 200. The drive assembly 400 is mounted on the frame 300 and is used to drive the scraper assembly 200 to rotate. The scraper assembly 200 and the drive assembly 400 are connected by the scraper connection structure described above.

[0063] Specifically, the drive assembly 400 includes a motor 410, a drive shaft 420, and a driven shaft 430. A drive sprocket 440 is mounted on the drive shaft 420, and a driven sprocket 450 is mounted on the driven shaft 430. The anchor chain 100 is wound around the drive sprocket 440 and the driven sprocket 450. Furthermore, the drive sprocket 440 and the driven sprocket 450 have grooves for the vertical chain link 120 to engage. For a detailed description of the structure, please refer to Chinese Patent CN218173684U.

[0064] The frame 300 includes a head frame 310, a middle frame 320, and a tail frame 330 that are interconnected. The head frame 310 and tail frame 330 are detachably mounted at both ends of the middle frame 320 for easy transportation and on-site installation. Multiple middle frames 320 can be provided according to actual production needs, such as two, three, five, or even more. Preferably, the middle frame 320 is connected to the head frame 310 and the tail frame 330 by bolts.

[0065] This embodiment of a scraper cleaner typically mounts below a belt conveyor. Due to limited space below the belt conveyor, typically around 300mm (the distance between the return belt and the ground), and even less in some extreme cases, the overall height of the scraper cleaner significantly impacts the ease of assembly. Therefore, in this embodiment, the motor 410 is positioned outside the head frame 310; the drive shaft 420 is mounted inside the head frame 310 via a drive shaft seat 460 and connected to the output end of the motor 410. The driven shaft 430 is mounted at the end of the tail frame 330 away from the middle frame 320 via a driven shaft seat 470. This design minimizes the overall height of the scraper cleaner, making it suitable for assembly in smaller spaces.

[0066] Traditional driven shaft seats 470 are typically bolted directly onto the frame 300, which not only increases the overall height of the equipment, making assembly operations in confined spaces unsuitable, but also makes the connection between the driven shaft seat 470 and the frame 300 susceptible to impact wear. This is because using an anchor chain 100 for transmission provides greater traction, especially during equipment startup, which subjects the bolts to significant radial impact, accelerating bolt wear and even breakage, thus affecting normal operation.

[0067] Therefore, refer to Figure 6As shown, in this embodiment, the connecting bolt 480 between the driven shaft seat 470 and the tail frame 330, which is laterally positioned, can be horizontally positioned (consistent with the conveying direction of the anchor chain), meaning the axis of the connecting bolt 480 is aligned with the direction of force. In this case, the connecting bolt 480 only needs to bear the weight of the driven shaft seat 470 and its related components, while the horizontal impact force is primarily borne by the tail frame 330. Therefore, the impact wear on the connecting bolt 480 can be significantly reduced, which helps extend its service life.

[0068] Furthermore, the tail frame 330 consists of two hollow steel boxes located at the ends of the middle frame 320, which reduces equipment cost and weight. Additionally, in this embodiment, the anchor chain 100 has high rigidity, and to prevent excessive chain floating, the vertical floating space between the chain links is strictly controlled. During the scraping of agglomerated materials by the scraper assembly 200, components such as the scraper assembly 200 and the tail frame 330 are subjected to significant loads. The starting load reaches its maximum, especially at the moment of equipment startup. The hollow tail frame 330 provides a certain degree of cushioning, which helps reduce impact damage to the tail frame 330 and the scraper assembly 200.

[0069] In some embodiments, the drive shaft seat 460 is slidably disposed on the side plates on both sides of the tail frame 330, and the drive shaft seat 460 is connected to a tensioning assembly 500. The tensioning assembly 500 may be a worm gear structure; wherein one end of the worm extends from the end of the head frame 310 into the head frame 310 and is connected to the drive shaft seat 460; the free end of the worm gear extends to the side of the head frame 310 and is connected to a rotating handle. Of course, the tensioning assembly 500 may also adopt other structural forms in the prior art, such as a lead screw and nut mating form.

[0070] This embodiment of a scraper cleaning machine includes a scraper assembly 200 that can be a toothless scraper, a toothed scraper, or a combination of both. The toothed scraper is primarily used to break up clumps of material, which are then cleaned by the toothless scraper. Therefore, when both are used together, the toothed scraper should be positioned in front of the toothless scraper.

[0071] refer to Figure 7 As shown, one embodiment of the toothless scraper includes a connecting plate 210 and a scraper body 220 arranged vertically. Both ends of the connecting plate 210 are respectively engaged with the mounting space of the connecting portion 130. The scraper body 220 is longer and wider than the connecting plate 210, and its end extends to the outer end of the transition chain link 131. In this embodiment, by extending the length of the scraper body 220, material below the anchor chain 100 can be cleaned, avoiding the problem of floating chain caused by material accumulation.

[0072] like Figure 8 As shown, one embodiment of a toothed scraper includes two scraper bodies 220 arranged in parallel and a connecting plate 210 disposed between the two scraper bodies 220. One end of the connecting plate 210 is inserted between the two scraper bodies 220, and the other end is inserted into the mounting space of the connecting portion 130. Meanwhile, the scraper bodies 220 are provided with anti-arch teeth 230.

[0073] Preferably, anti-arch teeth 230 are machined on both the upper and lower end faces of the scraper body 220. When the anti-arch teeth 230 on one end face are damaged, the anti-arch teeth 230 on the other end face can be replaced for continued use, thereby effectively extending the service life of the scraper body 220. Of course, the anti-arch teeth 230 can also be machined on only one end face of the scraper body 220. The specific method depends on the actual production conditions and is not specifically limited here.

[0074] refer to Figure 9 As shown, in some embodiments, the anti-bridging teeth 230 on the two scraper bodies 220 are distributed at the same height but staggered. That is, the dimensions of the front and rear rows of anti-bridging teeth 230 are basically the same, but they are staggered by a certain distance. It should be noted that "front and rear" here refers to the overall conveying direction of the anchor chain 100. That is, the front anti-bridging teeth 230 first break up the bridging of the caking material. If a small area of ​​caking material passes through the tooth spacing of the front row of anti-bridging teeth 230 without being broken up, the rear row of anti-bridging teeth 230 can be used to break up the bridging material, thereby effectively preventing missed breaking and ensuring the anti-bridging effect. Alternatively, although the front anti-bridging teeth 230 have broken up the caking material, they have not completely crushed it. In this case, the rear row of anti-bridging teeth 230 can also be used for secondary crushing to further improve the success rate of breaking up the bridging material, thereby ensuring the efficiency of breaking up the bridging material and avoiding the phenomenon of floating chain due to material caking.

[0075] refer to Figure 10 As shown, in some embodiments, the arch-breaking teeth 230 on the two scraper bodies 220 are aligned but distributed at different heights. That is, the front row of arch-breaking teeth 230 and the rear row of arch-breaking teeth 230 correspond one-to-one, but their tooth heights are different. Specifically, the tooth height of the front row of arch-breaking teeth 230 is lower than that of the rear row of arch-breaking teeth 230. When encountering materials with severe caking, the lower-tooth-height front row of arch-breaking teeth 230 is used to break up the arch first; then the higher-tooth-height rear row of arch-breaking teeth 230 performs a second arch-breaking operation. In this way, while ensuring arch-breaking efficiency, damage to the front row of arch-breaking teeth 230 can be minimized.

[0076] In this embodiment, since the scraper assembly 200 is a consumable component, it needs to be replaced after a certain period of operation to ensure the cleaning effect. Therefore, to ensure the strength of the scraper assembly 200, the connecting plate 210 and the scraper body 220 can be fixedly connected, such as by welding or integral molding. Meanwhile, to facilitate the assembly operation between the scraper assembly 200 and the anchor chain 100, the two components can be detachably connected, preferably by bolts.

[0077] refer to Figure 11 As shown, to ensure the arch-breaking efficiency of the anti-arching tooth 230, its top is usually designed as a spike. However, in some confined spaces, due to the long length of the conveyor belt, typically several meters or even tens of meters, idlers are usually used for V-shaped support in the conveying section. Due to space constraints, the return conveyor belt is generally laid flat. Therefore, the return conveyor belt will experience some sagging. Furthermore, to increase the strength of the conveyor belt, steel wires are usually added inside, increasing the belt's weight and further increasing its sagging. In this situation, the anti-arching tooth 230 easily comes into contact with the conveyor belt. If the tips of the anti-arching teeth 230 are too sharp, they can easily scratch or even tear the surface of the belt. Therefore, the edges of the top of the anti-arching tooth 230 can be rounded to reduce damage to the belt.

[0078] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A scraper connection structure, comprising a set of anchor chains (100) arranged opposite to each other; wherein, The anchor chain (100) is formed by connecting a plurality of horizontal links (110) and vertical links (120), characterized in that: the anchor chain (100) further includes a connecting part (130) for connecting the scraper assembly (200); The connecting part (130) includes a horizontally arranged transition chain link (131); both ends of the transition chain link (131) are respectively sleeved with a vertical chain link (120); a notch is provided on one side of the transition chain link (131), and the two ends of the notch extend outward to form a transition part (132); and an installation space is formed between the two transition parts (132) for the end of the scraper assembly (200) to be inserted; wherein, The vertical floating space of the horizontal chain link (110) and the transition chain link (131) within the vertical chain link (120) is 2-10 mm, and the vertical floating space of the transition chain link (131) within the vertical chain link (120) is not greater than the vertical floating space of the horizontal chain link (110) within the vertical chain link (120).

2. The scraper connection structure according to claim 1, characterized in that: The vertical floating space of the transition link (131) within the vertical link (120) is smaller than that of the horizontal link (110) within the vertical link (120), and the difference between the two is 1-3 mm; wherein, the vertical floating space of the horizontal link (110) within the vertical link (120) is 4-8 mm.

3. The scraper connection structure according to claim 2, characterized in that: The diameter D3 of the transition link (131) is greater than the diameter D2 of the horizontal link (110), and / or the aperture of the vertical link (120) connected to the horizontal link (110) is smaller than the aperture of the vertical link (120) connected to the transition link (131).

4. A scraper connection structure according to any one of claims 1-3, characterized in that: The length H1 of the notch on the transition link (131) is greater than the distance H2 between the two transition parts (132), and the two are connected by an arc segment (133).

5. A scraper cleaning machine, comprising a frame (300), a drive assembly (400), and a scraper assembly (200); wherein, The drive assembly (400) is mounted on the frame (300) and includes a motor (410), a drive shaft (420), and a driven shaft (430); the drive shaft (420) is provided with a drive sprocket (440), and the driven shaft (430) is provided with a driven sprocket (450); characterized in that: the drive assembly (400) and the scraper assembly (200) are connected by a scraper connection structure according to any one of claims 1-4; wherein, the anchor chain (100) is wound around the drive sprocket (440) and the driven sprocket (450); the scraper assembly (200) is connected to the connecting part (130).

6. A scraper cleaning machine according to claim 5, characterized in that: The frame (300) includes a head frame (310), a middle frame (320), and a tail frame (330) that are detachably connected; wherein the motor (410) is located on the outside of the head frame (310); The drive shaft (420) is mounted inside the head frame (310) via a drive shaft seat (460); The driven shaft (430) is disposed at one end of the tail frame (330) away from the middle frame (320) via a driven shaft seat (470); and the connecting bolt (480) between the driven shaft seat (470) and the tail frame (330) is horizontally disposed.

7. A scraper cleaning machine according to claim 6, characterized in that: The tail frame (330) consists of two hollow boxes located at the ends of the middle frame (320).

8. A scraper cleaning machine according to claim 7, characterized in that: The drive shaft seat (460) is slidably disposed on the side plates on both sides of the tail frame (330), and the drive shaft seat (460) is connected to a tensioning assembly (500); The tensioning assembly (500) adopts a worm gear structure; wherein, one end of the worm extends from the end of the head frame (310) into the head frame (310) and is connected to the drive shaft seat (460); the free end of the worm gear extends to the side of the head frame (310) and is connected to a rotating handle.

9. A scraper cleaning machine according to any one of claims 5-8, characterized in that: The scraper assembly (200) includes a toothless scraper and / or a toothed scraper; wherein, The toothless scraper includes a connecting plate (210) and a scraper body (220) arranged vertically; the end of the connecting plate (210) is inserted into the installation space of the connecting part (130); the end of the scraper body (220) extends to the outer end of the transition chain link (131). The toothed scraper includes two scraper bodies (220) arranged in parallel and a connecting plate (210) arranged between the two scraper bodies (220); one end of the connecting plate (210) is inserted between the two scraper bodies (220), and the other end is inserted into the installation space of the connecting part (130); wherein, at least one end face of the scraper body (220) is provided with anti-arch teeth (230), and the anti-arch teeth (230) on the front and rear scraper bodies (220) are arranged at the same height and staggered or aligned at different heights.

10. A scraper cleaning machine according to claim 9, characterized in that: The connecting plate (210) and the scraper body (220) are connected by welding or integral molding; the connecting plate (210) and the transition part (132) are connected by bolts.

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