An apron conveyor

Abstract

The utility model relates to the technical field of mine equipment, provide a scraper conveyor. The scraper conveyor includes stress component, jacking assembly, tail transition groove, telescopic tail frame and scraper chain. Telescopic tail frame slidingly is established in one end of tail transition groove, scraper chain is along first direction and is connected in tail transition groove and telescopic tail frame, stress component is established in one of tail transition groove and telescopic tail frame, jacking assembly is established in the other of tail transition groove and telescopic tail frame, and jacking assembly is correspondingly arranged with stress component, jacking assembly is used to along first direction telescopic, to adjust the relative position of tail transition groove and telescopic tail frame in first direction. The utility model solves the defect of the safety risk caused by the easy collapse or loosening of chain in the chain tensioning process in the prior art, realizes chain first connection and then tensioning, avoids chain disconnection when operating, and improves operation safety.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a scraper conveyor. Background Technology

[0002] Scraper conveyors are key equipment in fully mechanized coal mining faces, transporting materials via scraper chains. During installation and maintenance, chain tension is crucial for ensuring the equipment's normal operation.

[0003] Currently, chain tensioning on scraper conveyors is typically accomplished using a separate chain tensioner. Specifically, the operator must first disconnect the scraper chain, use the chain tensioner to tighten the chain, and then reconnect and lock it. During this process, the chain tensioner needs to be temporarily fixed at the head or tail of the machine, and tension is achieved by applying force mechanically or hydraulically.

[0004] The above methods carry the risk of chain breakage or loosening. Because the connection between the chain tensioner and the chain is a temporary operation, the chain may suddenly detach during the tightening or locking process due to sudden changes in force or insecure fixation. The high-speed ejection of the chain can cause serious injury to the operator, posing a significant safety hazard. Utility Model Content

[0005] This utility model provides a scraper conveyor to solve the safety risks caused by the easy breakage or loosening of the chain during the tensioning process in the prior art. It realizes that the chain is connected before tensioning, avoids the chain from coming off during operation, and improves the safety of operation.

[0006] This utility model provides a scraper conveyor, comprising:

[0007] Tail transition groove;

[0008] A telescopic tail frame is slidably disposed at one end of the tail transition groove;

[0009] A scraper chain is sleeved on the tail transition groove and the telescopic tail frame along the first direction;

[0010] A force-bearing component is located in one of the tail transition groove and the telescopic tail frame;

[0011] A lifting assembly is provided in one of the tail transition groove and the telescopic tail frame, and the lifting assembly is correspondingly provided with the force-bearing assembly; the lifting assembly is used to extend and retract along a first direction to adjust the relative position of the tail transition groove and the telescopic tail frame in the first direction.

[0012] According to the present invention, a scraper conveyor is provided, wherein at least two force-bearing components are provided, and the two force-bearing components are respectively located on both sides of the tail transition groove;

[0013] The lifting assembly is provided in at least two parts, and the two lifting assemblies are respectively located on both sides of the telescopic tail frame.

[0014] According to the scraper conveyor provided by this utility model, the force-bearing component includes:

[0015] The first base is located on the side of the tail transition groove;

[0016] A force-bearing block is provided on the first base, and the force-bearing block is correspondingly provided with the lifting component.

[0017] According to the present invention, a scraper conveyor is provided with reinforcing ribs between the first base and the force-bearing block.

[0018] According to the scraper conveyor provided by this utility model, the force-bearing block is provided with a limiting groove on the side facing the lifting component, and the limiting groove is used to limit the lifting component.

[0019] According to the present invention, a scraper conveyor is provided, wherein the lifting assembly includes:

[0020] A threaded seat is located on the side of the telescopic machine's tail frame;

[0021] A lifting screw is threadedly connected to the threaded seat, and the lifting screw is used to extend and retract along the first direction.

[0022] According to the scraper conveyor provided by this utility model, the threaded seat includes:

[0023] The second base is located on the side of the telescopic tail frame;

[0024] A threaded block is provided on the second base, and the lifting screw passes through the threaded block and is threadedly connected to the threaded block.

[0025] According to the present invention, a scraper conveyor is provided, wherein the first base is provided with at least two first locking blocks, and the second base is provided with at least two second locking blocks, and the corresponding first locking blocks and second locking blocks are arranged in a row to form a limiting channel.

[0026] According to the present invention, a scraper conveyor further includes a protective component, which is provided outside the lifting component;

[0027] The protective component includes a protective cover, and the protective cover has locking edges on both sides, which are positioned within the limiting channel.

[0028] According to the present invention, a scraper conveyor is provided, wherein the protective component further includes a connecting chain, one end of which is connected to the protective cover and the other end of which is connected to the telescopic tail frame.

[0029] The scraper conveyor provided by this utility model is already connected and in a slack state when the scraper chain is sleeved on the telescopic tail frame and the tail transition groove. When it is necessary to tension the scraper chain, simply lift the lifting component towards the force-bearing component. After the two make contact, continue lifting. At this time, since both are correspondingly located on the telescopic tail frame and the tail transition groove, the gap between the telescopic tail frame and the tail transition groove increases, thereby tensioning the scraper chain. This achieves the goal of connecting the scraper chain before tensioning it, preventing the scraper chain from disengaging during operation and improving operational safety. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a front view of the scraper conveyor provided by this utility model.

[0032] Figure 2 This is a top view of the scraper conveyor provided by this utility model.

[0033] Figure 3 This is a front view of the force-bearing components of the scraper conveyor provided by this utility model.

[0034] Figure 4 This is a side view of the force-bearing components of the scraper conveyor provided by this utility model.

[0035] Figure 5 This is a front view of the threaded seat of the scraper conveyor provided by this utility model.

[0036] Figure 6 This is a side view of the threaded seat of the scraper conveyor provided by this utility model.

[0037] Figure 7 This is a partial sectional view of the lifting screw of the scraper conveyor provided by this utility model.

[0038] Figure 8 This is a side view of the protective component of the scraper conveyor provided by this utility model.

[0039] Figure 9 This is a front view of the protective components of the scraper conveyor provided by this utility model.

[0040] Figure label:

[0041] 100: Force-bearing component; 110: First base; 120: Force-bearing block; 121: Limiting groove; 130: Reinforcing rib; 140: First locking block;

[0042] 200: Lifting assembly; 210: Threaded seat; 211: Second base; 212: Threaded block; 213: Second locking block; 220: Lifting screw;

[0043] 300: Protective component; 310: Protective cover; 320: Edge clamp; 330: Connecting chain;

[0044] 400: Tail transition groove;

[0045] 500: Telescopic tail frame;

[0046] 600: Scraper chain. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] The following is combined with Figures 1-9 Describe the structure and working principle of this utility model.

[0049] Reference Figure 1 and Figure 2 The scraper conveyor provided by this utility model includes a force-bearing component 100, a lifting component 200, a tail transition groove 400, a telescopic tail frame 500, and a scraper chain 600. The telescopic tail frame 500 is slidably disposed at one end of the tail transition groove 400; the scraper chain 600 is sleeved on the tail transition groove 400 and the telescopic tail frame 500 along a first direction; the force-bearing component 100 is disposed in one of the tail transition groove 400 and the telescopic tail frame 500; the lifting component 200 is disposed in the other of the tail transition groove 400 and the telescopic tail frame 500, and the lifting component 200 is correspondingly disposed to the force-bearing component 100; the lifting component 200 is used to extend and retract along the first direction to adjust the relative position of the tail transition groove 400 and the telescopic tail frame 500 in the first direction.

[0050] Specifically, the telescopic tail frame 500 slides onto one end of the tail transition groove 400 along its length. The connection method of the telescopic tail frame 500 along the tail transition groove 400 can be either one end of the tail transition groove 400 sleeved inside the other end of the telescopic tail frame 500, or one end of the telescopic tail frame 500 sleeved inside the other end of the tail transition groove 400. Both can move relative to each other along their length, with the first direction being their length direction. The scraper chain 600 is composed of multiple segments spliced ​​together to form a ring structure, which is then sleeved onto the telescopic tail frame 500 along the tail transition groove 400. It should be noted that when the scraper chain 600 is first sleeved, the distance between the telescopic tail frame 500 and the tail transition groove 400 needs to be adjusted to its minimum. With this setting, when the scraper chain 600 is sleeved onto the telescopic tail frame 500 and the tail transition groove 400, the connection is complete and in a relaxed state. When tensioning the scraper chain 600 is required, simply lift the lifting assembly 200 towards the force-bearing assembly 100. Once they contact each other, continue lifting. Since both are correspondingly located on the telescopic tail frame 500 and the tail transition groove 400, the gap between them increases, thus tensioning the scraper chain 600. This achieves the goal of connecting the scraper chain 600 before tensioning it, preventing the chain from disengaging during operation and improving operational safety.

[0051] In some possible embodiments, the telescopic tail frame 500 is slidably connected to the tail transition groove 400 via a guide rail slider structure. The guide rail is fixedly disposed at the end of the tail transition groove 400 along a first direction, and the slider is fixedly disposed at the corresponding position of the telescopic tail frame 500. A lubricating layer is provided between the two to reduce frictional resistance. The force-bearing component 100 is made of high-strength alloy steel and is fixedly disposed on the side wall of the tail transition groove 400 by bolts or welding. Its force-bearing surface is arranged perpendicular to the first direction. The lifting component 200 includes a hydraulic cylinder and a piston rod. The hydraulic cylinder base is fixedly disposed at the end of the telescopic tail frame 500 via a flange. The extended end of the piston rod is correspondingly disposed on the force-bearing surface of the force-bearing component 100. The inlet and outlet ports of the hydraulic cylinder are connected to an external hydraulic system via high-pressure oil pipes.

[0052] Reference Figure 2 In some embodiments of this utility model, at least two force-bearing components 100 are provided, and the two force-bearing components 100 are respectively located on both sides of the tail transition groove 400; at least two lifting components 200 are provided, and the two lifting components 200 are respectively located on both sides of the telescopic tail frame 500.

[0053] Specifically, the two force-bearing components 100 are located on both sides of the tail transition groove 400, and the two lifting components 200 are located on both sides of the telescopic tail frame 500. This symmetrical arrangement is to ensure that the scraper chain 600 is subjected to balanced forces on both sides during tensioning. The force-bearing components 100 serve as the load-bearing points for the lifting force, and their dual-sided arrangement avoids frame tilting caused by unilateral force. The synchronous action of the lifting components 200 on both sides ensures that the telescopic tail frame 500 moves smoothly along the first direction, preventing the chain from being tensioned on one side.

[0054] This embodiment utilizes a symmetrically arranged force-bearing component 100 and lifting component 200 on both sides to ensure that the scraper chain 600 maintains synchronous force on both sides during tensioning. When the operator adjusts the tensioning device, the lifting components 200 on both sides apply force simultaneously, and the thrust is evenly transmitted to the tail transition groove 400 through the force-bearing component 100, ensuring uniform distribution of chain tension. This arrangement effectively eliminates problems such as chain misalignment and frame deformation that may be caused by traditional single-sided tensioning devices, improving the stability and reliability of equipment operation.

[0055] Reference Figure 3 and Figure 4 In some embodiments of this utility model, the force-bearing component 100 includes a first base 110 and a force-bearing block 120. The first base 110 is disposed on the side of the tail transition groove 400; the force-bearing block 120 is disposed on the first base 110, and the force-bearing block 120 is correspondingly disposed with the lifting component 200. A reinforcing rib 130 is provided between the first base 110 and the force-bearing block 120.

[0056] Specifically, the first base 110 is fixed to the side upright plate of the tail transition groove 400 by high-strength bolts, and its mounting surface is precision machined to ensure flatness. The load-bearing block 120 is welded and fixed to the load-bearing surface of the first base 110, and the reinforcing ribs 130 between them are triangularly distributed and made of steel plate of the same material as the base. The pressure-bearing surface of the load-bearing block 120 is hardened and maintains surface contact with the force-applying end of the lifting component 200. In the above structure, the thickness of the first base 110 is determined according to the stress calculation, and its bolt holes are symmetrically arranged to ensure installation stability; the arrangement direction of the reinforcing ribs 130 is consistent with the stress direction, effectively improving the bending stiffness of the structure.

[0057] In this embodiment, the force-bearing block 120 is securely connected to the tail transition groove 400 via the first base 110, ensuring that the thrust of the lifting assembly 200 is evenly transmitted to the main frame. The reinforcing rib 130 significantly improves the overall rigidity of the force-bearing assembly 100, preventing deformation under lifting force. When the lifting assembly 200 applies force, the thrust is transmitted through the force-bearing block 120 and the first base 110 to the tail transition groove 400, driving the telescopic tail frame 500 to move and achieve chain tensioning. This structural design ensures a reasonable force transmission path, avoids local stress concentration, and improves the service life of the components.

[0058] In other possible embodiments, the force-bearing block 120 can be mounted on the first base 110 via an adjustable connection structure, which includes an elongated hole and an adjusting bolt in the first base 110. In this embodiment, the installation position of the force-bearing block 120 can be changed by adjusting the position of the adjusting bolt in the elongated hole to accommodate the tension requirements of chains of different specifications. In the above structure, the pressure-bearing surface of the force-bearing block 120 can be provided with a replaceable wear-resistant liner, which is fixed by countersunk screws. The adjustable structure of this embodiment enhances the adaptability of the device, and the design of the wear-resistant liner extends the service life of critical contact components and reduces maintenance costs.

[0059] Reference Figure 3 In some embodiments of this utility model, the force-bearing block 120 is provided with a limiting groove 121 on the side facing the lifting component 200, and the limiting groove 121 is used to limit the lifting component 200.

[0060] Specifically, the limiting groove 121 is opened vertically along the bearing surface of the force-bearing block 120, with a rectangular cross-section and a depth slightly larger than the mating dimension of the force-applying end of the lifting assembly 200. The two side walls of the limiting groove 121 are precision-machined to form a sliding fit with the two sides of the force-applying end of the lifting assembly 200. In the above structure, the bottom surface of the limiting groove 121 is parallel to the bearing surface of the force-bearing block 120, and the force-applying end of the lifting assembly 200 is provided with a boss structure that matches the limiting groove 121. After the boss is inserted into the limiting groove 121, it forms an axial constraint. The opening end of the limiting groove 121 is provided with a guide slope to facilitate the centering insertion of the force-applying end of the lifting assembly 200.

[0061] This embodiment utilizes the cooperation structure between the limiting groove 121 and the force-applying end of the lifting assembly 200 to restrict the radial displacement of the force-applying end while transmitting the lifting force. When the lifting assembly 200 operates, its force-applying end moves axially along the limiting groove 121, pushing the force-receiving block 120 to displace, while the sidewall of the limiting groove 121 constrains the swing tendency of the force-applying end. This structure effectively prevents off-center loading between the force-applying end and the force-receiving block 120 during the lifting process, ensuring that the direction of the lifting force transmission is always consistent with the design direction, thus improving the stability and reliability of the tensioning process.

[0062] In some other possible embodiments, the limiting groove 121 may be provided with a lubrication structure, which includes an oil groove formed at the bottom of the groove and a lubricating material layer disposed on the groove wall. In this embodiment, the oil groove stores grease, and in conjunction with the lubricating material layer on the groove wall, the frictional resistance between the force-applying end of the lifting assembly 200 and the limiting groove 121 can be reduced. In the above structure, the oil groove is arranged along the length of the limiting groove 121 and communicates with the outside through an oil injection hole; the lubricating material layer is made of a self-lubricating composite material embedded in the groove wall. The lubrication structure of this embodiment reduces wear on the contact surface, extends the service life of the limiting groove 121, and makes the lifting action smoother.

[0063] Reference Figures 5 to 7 In some embodiments of this utility model, the lifting assembly 200 includes a threaded seat 210 and a lifting screw 220. The threaded seat 210 is located on the side of the telescopic tail frame 500; the lifting screw 220 is threadedly connected to the threaded seat 210 and is used for telescopic extension and retraction in a first direction.

[0064] Specifically, the threaded seat 210 is fixed to the side upright plate of the telescopic tail frame 500 by welding, with its axis parallel to the first direction. The threaded seat 210 has a trapezoidal threaded hole machined inside, forming a precise fit with the external thread of the lifting screw 220. The end of the lifting screw 220 is equipped with a thrust bearing, which forms a rotatable pressure fit with the bottom surface of the limiting groove 121 of the force-bearing block 120. In the above structure, the threaded seat 210 is made of high-strength cast iron, and its mounting surface is milled to ensure a good fit with the telescopic tail frame 500; the lifting screw 220 is made of alloy structural steel, and the threaded portion is heat-treated to improve wear resistance.

[0065] In this embodiment, rotating the lifting screw 220 causes axial displacement within the threaded seat 210, thereby pushing the telescopic tailstock 500 to move along the first direction. When tensioning the scraper chain 600 is required, the operator uses a special wrench to rotate the lifting screw 220. The axial movement of the screw is converted into a thrust on the force-bearing block 120 through the thrust bearing, causing the telescopic tailstock 500 to extend outward. This threaded transmission mechanism has a self-locking characteristic, can remain stable in any position without the need for an additional locking device, and has high adjustment accuracy and moderate operating force, making it suitable for use in downhole environments.

[0066] Reference Figure 6 In some embodiments of this utility model, the threaded seat 210 includes a second base 211 and a threaded block 212. The second base 211 is disposed on the side of the telescopic tail frame 500; the threaded block 212 is disposed on the second base 211, and the lifting screw 220 passes through the threaded block 212 and is threadedly connected to the threaded block 212.

[0067] Specifically, the second base 211 is fixed to the side upright plate of the telescopic tail frame 500 by high-strength bolts or welding, and its mounting surface is milled to ensure flatness. The threaded block 212 is made of wear-resistant cast iron and is vertically fixed to the load-bearing surface of the second base 211 by locating pins and fastening bolts. An adjusting shim is provided between the contact surfaces of the two to calibrate the axis of the threaded hole. The lifting screw 220 passes through the central threaded hole of the threaded block 212. The threaded hole is machined into a trapezoidal thread to form a precision fit with the external thread of the lifting screw 220. In the above structure, the second base 211 may also be provided with reinforcing ribs to improve structural rigidity, and the threaded holes of the threaded block 212 may also be provided with guide chamfers at both ends to facilitate the centering and insertion of the screw.

[0068] This embodiment utilizes a split-design second base 211 and threaded block 212 structure, making the threaded transmission mechanism easier to manufacture and maintain. When the lifting screw 220 rotates, the threaded block 212 acts as a fixed support, converting the rotational motion into axial movement of the screw, pushing the telescopic tailstock 500 to move along the first direction. This structure allows for the individual replacement of the worn threaded block 212 without replacing the entire base, reducing maintenance costs. The split design also facilitates adjustment of the threaded hole's positional accuracy, ensuring that the axis of motion of the lifting screw 220 is strictly parallel to the first direction.

[0069] Reference Figure 1 , Figure 4 , Figure 6 , Figure 8 In some embodiments of this utility model, the first base 110 is provided with at least two first locking blocks 140, and the second base 211 is provided with at least two second locking blocks 213. The corresponding first locking blocks 140 and second locking blocks 213 are arranged in a row to form a limiting channel. The scraper conveyor also includes a protective component 300, which covers the outside of the lifting component 200. The protective component 300 includes a protective cover 310, and the protective cover 310 has locking edges 320 on both sides, which limit the limiting channel.

[0070] Specifically, the first locking block 140 is vertically fixed to the side of the first base 110 by welding, and the second locking block 213 is vertically fixed to the side of the second base 211 by welding, with corresponding parallel guide grooves formed between them. The protective cover 310 is made of bent steel plate, and its two side edges 320 are continuous folded edges, forming a sliding fit with the limiting channel formed by the first locking block 140 and the second locking block 213. In the above structure, the distance between the first locking block 140 and the second locking block 213 is slightly greater than the thickness of the edge 320, ensuring that the protective cover 310 can slide smoothly along the limiting channel. The top of the protective cover 310 is provided with an observation window for easy viewing of the working status of the lifting assembly 200.

[0071] In this embodiment, the protective cover 310 is guided and fixed by a limiting channel formed by the first locking block 140 and the second locking block 213, allowing the protective component 300 to completely cover the lifting component 200. When maintenance of the lifting component 200 is required, the protective cover 310 can be slid off along the limiting channel; after maintenance, the locking edge 320 of the protective cover 310 is aligned with the limiting channel and pushed in for installation. This structure ensures the reliability of the protection, facilitates equipment maintenance, and effectively prevents coal dust from entering the lifting mechanism and affecting its normal operation.

[0072] Reference Figure 9 In some embodiments of this utility model, the protective component 300 further includes a connecting chain 330, one end of which is connected to the protective cover 310 and the other end is connected to the telescopic tail frame 500.

[0073] Specifically, the connecting chain 330 is made of stainless steel chain links. One end is fixed to the side reinforcing rib of the protective cover 310 by U-bolts, and the other end is connected to the side plate mounting seat of the telescopic tail frame 500 via a rotatable joint. In the above structure, the length of the connecting chain 330 is determined according to the maximum disassembly displacement of the protective cover 310, ensuring that the connection remains even when the protective cover 310 is fully opened. The rotatable joint includes a pin and a bushing, allowing the connecting chain 330 to swing freely when the protective cover 310 moves, avoiding torsional stress.

[0074] In this embodiment, a connecting chain 330 reliably connects the protective cover 310 to the telescopic tailstock 500, preventing accidental fall of the protective cover 310 during disassembly. When maintenance of the lifting assembly 200 is required, the operator can slide the protective cover 310 down the limiting channel, and the connecting chain 330 extends and remains connected. After maintenance, the protective cover 310 can simply be pushed back into place. This structure ensures the detachability of the protective cover 310 and eliminates the risk of it being lost or nowhere to be placed after disassembly, thus improving the safety of downhole operations.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A scraper conveyor, characterized in that, include: Tail transition groove (400); The telescopic tail frame (500) is slidably disposed at one end of the tail transition groove (400); The scraper chain (600) is sleeved on the tail transition groove (400) and the telescopic tail frame (500) along the first direction. A force-bearing component (100) is disposed in one of the tail transition groove (400) and the telescopic tail frame (500); A lifting assembly (200) is provided in the other of the tail transition groove (400) and the telescopic tail frame (500), and the lifting assembly (200) is correspondingly provided with the force-bearing assembly (100); the lifting assembly (200) is used to extend and retract along a first direction to adjust the relative position of the tail transition groove (400) and the telescopic tail frame (500) in the first direction.

2. The scraper conveyor according to claim 1, characterized in that, At least two force-bearing components (100) are provided, and the two force-bearing components (100) are respectively located on both sides of the tail transition groove (400); At least two lifting components (200) are provided, and the two lifting components (200) are respectively located on both sides of the telescopic tail frame (500).

3. The scraper conveyor according to claim 2, characterized in that, The force-bearing component (100) includes: The first base (110) is located on the side of the tail transition groove (400); A force-bearing block (120) is disposed on the first base (110), and the force-bearing block (120) is correspondingly disposed with the lifting component (200).

4. The scraper conveyor according to claim 3, characterized in that, A reinforcing rib (130) is provided between the first base (110) and the force-bearing block (120).

5. The scraper conveyor according to claim 3, characterized in that, The force-bearing block (120) is provided with a limiting groove (121) on the side facing the lifting component (200), and the limiting groove (121) is used to limit the lifting component (200).

6. The scraper conveyor according to claim 5, characterized in that, The lifting assembly (200) includes: A threaded seat (210) is provided on the side of the telescopic tail frame (500); A lifting screw (220) is threaded to the threaded seat (210) and is used to extend and retract along the first direction.

7. The scraper conveyor according to claim 6, characterized in that, The threaded seat (210) includes: The second base (211) is located on the side of the telescopic tail frame (500); A threaded block (212) is provided on the second base (211), and the lifting screw (220) passes through the threaded block (212) and is threadedly connected to the threaded block (212).

8. The scraper conveyor according to claim 7, characterized in that, The first base (110) is provided with at least two first locking blocks (140), and the second base (211) is provided with at least two second locking blocks (213). The corresponding first locking blocks (140) and second locking blocks (213) are arranged in a row to form a limiting channel.

9. The scraper conveyor according to claim 8, characterized in that, It also includes a protective component (300) that covers the outside of the lifting component (200); The protective component (300) includes a protective cover (310), and the protective cover (310) has locking edges (320) on both sides, the locking edges (320) being limited to the limiting channel.

10. The scraper conveyor according to claim 9, characterized in that, The protective component (300) also includes a connecting chain (330), one end of which is connected to the protective cover (310) and the other end of which is connected to the telescopic tail frame (500).

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