Full-mechanized coal mining face lays the scraper chain turnover device

Abstract

The application relates to the installation technical field of a fully-mechanized coal mining face, and provides a fully-mechanized coal mining face laying scraper chain turnover device which comprises a base, the base is composed of profile steel and welded into a rectangular frame structure, a supporting frame is fixedly installed above the base and is formed by welding a steel plate, a rotating shaft is rotatably supported on the top of the supporting frame through two groups of bearing seats, a roller is fixedly sleeved on the rotating shaft and can rotate together with the rotating shaft, the axial length of the roller is greater than the width of a scraper chain to be turned over, and the outer surface of the roller is used for supporting and guiding the scraper chain; wherein the overall height of the supporting frame and the roller is set to be capable of lifting the scraper chain to a predetermined height, so that the scraper chain can be turned over around the roller under the action of gravity. The fully-mechanized coal mining face laying scraper chain turnover device provided by the application realizes multiple functions of safe, efficient and self-adaptive turnover through the cooperative matching of a turnover, limiting and supporting mechanism.

Description

Technical Field

[0001] This application relates to the field of installation technology for fully mechanized coal mining faces, and more specifically, to a scraper chain turning device for laying scraper chains in fully mechanized coal mining faces. Background Technology

[0002] Currently, in existing fully mechanized mining faces, the laying of scraper chains for conveyors and transfer machines generally relies on specialized forklifts for chain flipping and alignment. While this method achieves basic functionality, it has significant drawbacks. During the flipping process, the heavy scraper chain poses a risk of falling, easily causing serious injury to personnel and damaging equipment, highlighting significant safety risks. Furthermore, specialized forklifts are bulky and poorly adapted to the narrow and complex working spaces of fully mechanized mining faces, limiting their operational capabilities and severely impacting installation efficiency. In addition, forklift chain flipping operations require multiple people to coordinate and direct, resulting in high labor costs, cumbersome procedures, and overall low efficiency. Frequent use of specialized equipment also leads to high wear and maintenance costs. Therefore, there is an urgent need for a specialized scraper chain flipping device that is compact, safe to operate, and can significantly improve laying efficiency while reducing overall costs, ensuring the safety, efficiency, and economy of installation operations in fully mechanized coal mining faces. Utility Model Content

[0003] This application aims to at least address the technical problems in the related art, such as the large size of special forklifts during chain flipping and correction operations, their poor adaptability to narrow and complex fully mechanized mining face working spaces, their limited operational capabilities, which seriously affect installation efficiency, and the high wear and maintenance costs caused by using special forklift equipment.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a device for overturning scraper chains laid in a fully mechanized mining face, comprising: a base, the base being a rectangular frame structure welded from steel sections; a support frame, the support frame being fixedly installed above the base and formed by welding steel plates; a rotating shaft, the rotating shaft being rotatably supported on the top of the support frame via two sets of bearing seats; and a roller, the roller being fixedly sleeved on the rotating shaft and capable of rotating together with the rotating shaft, the axial length of the roller being greater than the width of the scraper chain to be overturned, and the outer surface of the roller being used to support and guide the scraper chain; wherein, the overall height of the support frame and the roller is set to be able to lift the scraper chain to a predetermined height, so that the scraper chain can be overturned around the roller under its own gravity.

[0005] This application provides a turning device for the scraper chain in a fully mechanized mining face. Through the coordinated operation of turning, limiting, and supporting mechanisms, it achieves multiple functions including safe, efficient, and adaptive turning. In the safe and efficient turning scenario, the turning mechanism consists of a base, a support frame, and a high-positioned roller. Its core principle is to eliminate the forced turning mode of a forklift. By pulling the chain to a specific height on the roller, it utilizes the chain's own gravity to achieve natural turning, fundamentally eliminating the risk of chain falling and injuring people or damaging equipment, and significantly simplifying the operation process. In the chain anti-deviation and adaptive scenarios, the limiting mechanism, through an adjustable baffle located on the side of the roller, effectively limits the lateral displacement and twisting of the chain during the turning process. Its detachable installation design allows for flexible adjustment of the position according to chain specifications, significantly improving the device's adaptability to different working conditions and avoiding jamming or secondary turning problems caused by chain deviation. In scenarios requiring interference prevention and smooth guidance, the support mechanism provides a smooth transition support for the drooping chain before it flips up by using a support plate tilted below the roller. This effectively prevents direct rubbing between the chain and the base frame, reduces chain wear, and guides the chain to disengage in an orderly manner, avoiding chain jamming inside the device and ensuring the continuity and smoothness of the flipping process.

[0006] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 One of the structural schematic diagrams of a scraper chain turning device for a fully mechanized mining face according to an embodiment of this application; Figure 2 A second schematic diagram of the structure of a scraper chain turning device for a fully mechanized mining face according to an embodiment of this application; Figure 3 Third schematic diagram of the structure of the scraper chain turning device for a fully mechanized mining face according to an embodiment of this application; Figure 4 This is the fourth schematic diagram of the structure of the scraper chain turning device for laying scraper chains in a fully mechanized mining face according to one embodiment of this application.

[0008] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Scraper chain turning device for fully mechanized mining face, 110 Base, 112 Forklift end transport hole, 114 Adjustable support foot, 120 Support frame, 122 Limiting baffle, 124 Vertical support part, 130 Rotating shaft, 140 Bearing seat, 150 Roller, 160 Support plate. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0011] The following reference Figures 1 to 4 This application describes a fully mechanized mining face laying scraper chain turning device 100 provided according to some embodiments.

[0012] like Figures 1 to 4 As shown, Figure 1 A three-dimensional structural schematic diagram of a fully mechanized mining face scraper chain turning device 100 according to an embodiment of this application; Figure 2 A front view structural schematic diagram of a fully mechanized mining face scraper chain turning device 100 according to an embodiment of this application; Figure 3 A top view of a fully mechanized mining face scraper chain turning device 100 according to an embodiment of this application; Figure 4 This is a left-side structural schematic diagram of a fully mechanized mining face scraper chain turning device 100 according to an embodiment of this application.

[0013] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figure, an embodiment of this application provides a scraper chain turning device 100 for fully mechanized mining faces, comprising: a base 110, which is a rectangular frame structure welded from steel sections; a support frame 120, which is fixedly installed above the base 110 and is formed by welding steel plates; a rotating shaft 130, which is rotatably supported on the top of the support frame 120 by two sets of bearing seats 140; and a roller 150, which is fixedly sleeved on the rotating shaft 130 and can rotate together with the rotating shaft 130. The axial length of the roller 150 is greater than the width of the scraper chain to be turned, and the outer surface of the roller 150 is used to support and guide the scraper chain. The overall height of the support frame 120 and the roller 150 is set to be able to lift the scraper chain to a predetermined height, so that the scraper chain can turn around the roller 150 under its own gravity.

[0014] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the fully mechanized mining face scraper chain turning device 100 provided in this application includes a base 110, a support frame 120, a rotating shaft 130, and a roller 150. The base 110 is a rectangular frame structure welded from steel profiles. The support frame 120, formed by welding steel plates, is fixedly installed above the base 110. The rotating shaft 130 is rotatably supported on the top of the support frame 120 via two sets of bearing seats 140. The roller 150 is fixedly sleeved on the rotating shaft 130 and can rotate with the rotating shaft 130. The axial length of the roller 150 is greater than the width of the scraper chain to be turned, and the outer surface of the roller 150 is used to support and guide the scraper chain. The overall height of the support frame 120 and the roller 150 is set to lift the scraper chain to a predetermined height, allowing the scraper chain to turn around the roller 150 under its own weight.

[0015] Thus, with the stable foundation constructed by the base 110 and the support frame 120, and the high-positioned roller 150, this device provides a defined and structured path for the overturning operation of the scraper chain. Its core working principle is that when the pulled scraper chain is lifted and placed on the roller 150, the self-gravity torque generated by the lifting of the scraper chain is sufficient to overcome the torsion between its links, thereby causing a natural and smooth overturning around the roller 150. This design fundamentally replaces the traditional high-risk, low-efficiency forklift forced overturning method, significantly improving operational safety while simplifying the operation process and increasing the efficiency of chain laying.

[0016] Compared with existing technologies, the advantages of the fully mechanized mining face laying scraper chain turning device 100 provided in this application are as follows: First, significantly improved safety: It completely eliminates major safety hazards such as chain falls causing injury and equipment damage, while avoiding the risks of personnel directing forklift operations, thus significantly improving operational safety. Second, significantly improved operational efficiency: It optimizes the chain turning process, reduces waiting time and manpower coordination costs, and significantly shortens the chain laying time compared to forklift chain turning operations, thereby improving production efficiency. Third, effectively reduced costs: It reduces the use of special forklifts, lowers equipment wear and maintenance costs, and reduces labor costs, achieving effective control of operating costs. Fourth, strong adaptability: The device has a flexible structure and can adapt to different specifications of chains and complex and ever-changing fully mechanized mining face operating environments, with a wide range of applications. Fifth, simple and durable structure: It is manufactured using channel steel, steel plates, and high-strength wear-resistant parts, with a simple structure, convenient maintenance, durability, and long service life, reducing equipment replacement costs.

[0017] Specifically, there are current challenges in laying the main chains for the conveyors and transfer machines in fully mechanized mining faces. The current workflow requires the use of winches or special vehicles to pull steel wire ropes pre-laid in the chutes and transfer machine troughs, thereby driving the top or bottom chains stored in the main chain buckets through the bottom and top chutes of the chutes and the bottom and top troughs of the transfer machines. However, during this process, the main chains are prone to overturning and twisting, requiring specialized forklifts to correct the overturning before laying can continue. Existing special forklift chain-tipping operations have significant drawbacks: First, the chain is at risk of falling during operation, which could easily cause serious injury to on-site personnel and potentially damage equipment, posing a prominent safety hazard. Second, special forklift operation requires ample on-site space, limiting its operational flexibility in complex fully mechanized mining environments. Third, forklift chain-tipping operations require multiple personnel for coordination and command, resulting in high labor costs and low efficiency. Fourth, frequent use of forklifts for chain-tipping leads to significant equipment wear and increased maintenance costs. Although special forklift chain-tipping operations can achieve the basic function of chain-tipping, considering factors such as safety, efficiency, and cost, its disadvantages are significant, severely hindering the improvement of safety levels and efficient operation of current conveyor and transshipment chain installations.

[0018] To address the shortcomings of existing technologies, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application provides a scraper chain turning device 100 for fully mechanized mining faces. Through the coordinated operation of turning, limiting, and supporting mechanisms, it achieves multiple functions of safe, efficient, and adaptive turning. In the safe and efficient turning scenario, the turning mechanism consists of a base 110, a support frame 120, and a high-positioned roller 150. Its core principle is to abandon the forced turning mode of forklifts. By pulling the chain to a specific height on the roller 150, the chain's own gravity is used to achieve natural turning, fundamentally eliminating the risk of chain falling and injuring people and damaging equipment, and greatly simplifying the operation process. In the chain anti-deviation and adaptive scenario, the limiting mechanism is located on the side of the roller 150 through an adjustable baffle, effectively limiting the lateral displacement and twisting of the chain during the turning process. Its detachable installation design allows for flexible adjustment of the position according to the chain specifications, significantly improving the device's adaptability to different working conditions and avoiding jamming or secondary turning problems caused by chain deviation. In scenarios requiring interference prevention and smooth guidance, the support mechanism provides smooth transition support for the drooping chain before flipping by using the support plate 160 tilted below the roller 150. This effectively prevents direct rubbing between the chain and the base 110 frame, reduces chain wear, and guides the chain to disengage in an orderly manner, avoiding chain jamming inside the device and ensuring the continuity and smoothness of the flipping process.

[0019] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, roller 150 is a belt roller.

[0020] Specifically, such as Figure 1 As shown, roller 150 adopts a belt roller structure. As a mature conveying component, belt rollers typically have a high coefficient of friction and good wear resistance on their surface. In this device, the belt roller is used as a driven roller. When the scraper chain is pulled across its surface, the roller 150 is driven to rotate by the friction between the scraper chain and the surface of roller 150. This design reduces the relative sliding friction between the scraper chain and roller 150, ensuring smooth scraper chain rotation and effectively reducing wear on the surface of roller 150 and the scraper chain, thus extending the service life of key components.

[0021] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the diameter of the roller 150 is 1m, the cylinder of the roller 150 is made of alloy steel, and the outer surface is covered with a wear-resistant rubber layer.

[0022] Specifically, such as Figure 1 and Figure 2 As shown, roller 150 adopts a specific specification with a diameter of 1 meter. Its cylinder body is made of alloy steel and covered with a wear-resistant rubber layer. This diameter design provides a suitable bending radius for chain turning, helping to reduce the stress on the chain during turning. The alloy steel cylinder body ensures the structural strength and durability of roller 150, capable of withstanding the load of heavy scraper chains. The wear-resistant rubber layer significantly increases the friction between roller 150 and the chain, ensuring smooth chain transmission without slippage. Its elasticity and wear resistance also provide cushioning and protection. This ensures the structural stability of the device while optimizing the chain turning dynamics, reducing wear on the surface of roller 150, and extending the service life of the device.

[0023] In some embodiments, optionally, such as Figure 1 As shown, the rectangular frame structure of the base 110 has at least two forklift end transport holes 112 for forklift forks to insert into in order to transport the scraper chain turning device 100 laid on the fully mechanized mining face.

[0024] Specifically, such as Figure 1As shown, the forklift end transport hole 112 on the rectangular frame structure of the base 110 is formed by through holes in the web of the steel profile that makes up the frame. This structural design allows the forklift forks to be directly inserted into the hole, smoothly lifting the entire device off the ground for transport. Utilizing the structural strength of the base 110 frame itself, standardized holes enable rapid docking with common forklift tools. This greatly improves the mobility and deployment efficiency of the device within the fully mechanized mining face, allowing it to be quickly moved to different work locations according to the work progress, while avoiding the use of complex handling methods such as hoisting equipment, making operation simple and quick.

[0025] In practical applications, a forklift end transport hole 112 is opened at a position of 2.5 meters in height and 2 meters in width on the base 110 to facilitate the movement of the device on the fully mechanized mining face. After reaching the designated working position, the large base 110 design ensures safe and stable operation. In practical applications, the position of the forklift end transport hole 112 can be designed and opened according to specific operational needs, which will not be elaborated here.

[0026] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, a limit baffle 122 is also provided on the support frame 120. The limit baffle 122 is located on the side of the roller 150 and is used to limit the lateral displacement of the scraper chain during the flipping process.

[0027] Specifically, such as Figure 1 As shown, the limiting baffles 122 are vertically arranged plate-like structures located on both sides of the roller 150. By forming a physical barrier on the sides of the roller 150, when the scraper chain flips on the surface of the roller 150, the lateral swing of the chain is constrained by the limiting baffles 122, thereby limiting the movement trajectory of the chain within a preset width range. This design effectively prevents the chain from slipping laterally, deviating, or interfering with other components of the device during the flipping process, ensuring the stability and reliability of the flipping process, while avoiding problems such as chain jamming and twisting that may be caused by chain position deviation.

[0028] In some embodiments, optionally, such as Figure 1 As shown, the limiting baffle 122 is detachably mounted on the support frame 120 by bolt connection or pin, so as to adapt to scraper chains of different widths by changing the installation position.

[0029] Specifically, such as Figure 1As shown, the limiting baffle 122 is detachably connected to the support frame 120 via bolts or pins. The core of this design lies in the series of mounting holes or adjustment slots on the support frame 120. By selecting different fixing positions or replacing baffles of different specifications, the effective distance between the two limiting baffles 122 can be changed. The modular connection method enables stepless or stepped adjustment of the working width. This design allows the same device to adapt to scraper chains of various widths, significantly improving the versatility and applicability of the equipment, while simplifying on-site adjustment procedures and avoiding the waste of resources associated with configuring dedicated devices for different chains.

[0030] In some embodiments, optionally, such as Figure 1 and Figure 4 As shown, the support frame 120 also includes two opposing vertical support portions 124, with the bearing housing 140 mounted on the top of the vertical support portions 124.

[0031] Specifically, such as Figure 1 and Figure 4 As shown, the support frame 120 includes two opposing vertical support parts 124, which are firmly connected to the base 110 by welding or bolting to form a stable portal frame structure. The bearing seat 140 is precisely installed on the top machined surface of the vertical support part 124. By setting the support points of the main load-bearing component, the roller 150, and its rotating shaft 130, at the highest position of the vertical support structure, a stable support system with sufficient working height is formed. This design ensures the accuracy and stability of the roller 150's installation position, providing reliable support conditions for the smooth rotation of the scraper chain. At the same time, the entire support structure is reasonably stressed and can effectively withstand various loads generated during the chain rotation process, ensuring the long-term stable operation of the device under heavy load conditions.

[0032] In some embodiments, optionally, such as Figure 3 As shown, bearing housing 140 is a self-aligning roller bearing housing 140.

[0033] Specifically, such as Figure 3As shown, a self-aligning roller bearing is installed inside the bearing housing 140. This type of bearing, due to its spherical outer ring raceway, has a self-aligning function, compensating for misalignment between the rotating shaft 130 and the bearing housing 140 caused by installation errors, shaft bending under stress, or uneven settlement of the base 110. Through the self-adaptive fit of the spherical raceway and rollers inside the bearing, normal operation can be maintained even when there is a certain angular deviation between the bore of the bearing housing 140 and the axis of the rotating shaft 130. This design improves the adaptability of the device to complex downhole working conditions, effectively avoiding additional loads, abnormal wear, and overheating caused by shaft misalignment, thereby ensuring the smooth rotation of the drum 150 and extending the service life of the bearing and the entire transmission system.

[0034] In some embodiments, optionally, such as Figure 2 As shown, adjustable support feet 114 are also fixed at the four corners of the bottom of the base 110, which are used to level the fully mechanized mining face and lay the scraper chain turning device 100 on the uneven working ground.

[0035] Specifically, such as Figure 2 As shown, adjustable support feet 114 are installed at the four corners of the base 110 via threaded connections. Each support foot includes an upper screw structure and a bottom support plate; its extension length can be changed by rotating the support foot. Utilizing the precision and self-locking nature of the threaded drive, the unevenness of the downhole working surface is compensated for by adjusting the extension of the four support feet individually, keeping the device base 110 stable and level. This design effectively eliminates device swaying or tilting caused by uneven ground, ensuring the stability of the working position of the drum 150, providing a reliable guarantee for the smooth rotation of the scraper chain, and avoiding chain jamming or safety accidents caused by device instability.

[0036] In some embodiments, optionally, such as Figure 1 , Figure 3 and Figure 4 As shown, the fully mechanized mining face paving scraper chain turning device 100 also includes: a support plate 160, which is inclinedly arranged on the base 110 and located below the roller 150. The upper end of the support plate 160 is connected to the rectangular frame structure of the base 110, and the lower end extends inclinedly towards the ground to form an inclined smooth transition surface, which is used to support and guide the drooping scraper chain and prevent the scraper chain from rubbing against or accumulating with the base 110.

[0037] Specifically, such as Figure 1 , Figure 3 and Figure 4As shown, the support plate 160 is made of wear-resistant steel plate. Its upper end is fixed to the crossbeam of the base 110 frame by welding or bolting, and its lower end extends freely towards the ground at a certain angle. The technical principle of the support plate 160 is to construct a rigid inclined surface that smoothly transitions from the tangent point of the roller 150 to the working plane. When the scraper chain is lowered from the roller 150, its naturally drooping section first contacts the inclined surface of the support plate 160. As the chain continues to move, the drooping section slides along the inclined surface without making direct contact with the structure of the base 110. This design effectively avoids rigid scraping between the chain and the base 110 frame, significantly reducing chain wear. At the same time, the inclined guide surface regulates the lowering trajectory of the chain, preventing the chain from tangling and accumulating inside the device, ensuring the continuity and stability of the turning operation.

[0038] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A scraper chain turning device for laying scrapers in a fully mechanized mining face, characterized in that, include: The base is a rectangular frame structure welded from steel sections; A support frame, which is fixedly installed above the base, is formed by welding steel plates; A rotating shaft is rotatably supported on the top of the support frame by two sets of bearing seats; A roller is fixedly sleeved on the rotating shaft and can rotate together with the rotating shaft. The axial length of the roller is greater than the width of the scraper chain to be flipped. The outer surface of the roller is used to support and guide the scraper chain. The overall height of the support frame and the roller is set to be such that the scraper chain can be lifted to a predetermined height, so that the scraper chain can rotate around the roller under its own weight.

2. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, The roller is a belt roller.

3. The fully mechanized mining face laying scraper chain turning device according to claim 2, characterized in that, The diameter of the roller is 1m, and the roller body is made of alloy steel and covered with a wear-resistant rubber layer.

4. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, The rectangular frame structure of the base has at least two forklift end transport holes for forklift forks to insert into in order to transport the scraper chain turning device laid on the fully mechanized mining face.

5. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, The support frame is also provided with a limiting baffle, which is located on the side of the roller and is used to limit the lateral displacement of the scraper chain during the flipping process.

6. The fully mechanized mining face laying scraper chain turning device according to claim 5, characterized in that, The limiting baffle is detachably installed on the support frame by bolts or pins, so as to adapt to scraper chains of different widths by changing the installation position.

7. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, The support frame also includes two opposing vertical support sections, and the bearing seat is mounted on the top of the vertical support section.

8. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, The bearing housing is a self-aligning roller bearing housing.

9. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, Adjustable support feet are also fixed at the four corners of the base, which are used to level the fully mechanized mining face and lay the scraper chain turning device on uneven working ground.

10. The fully mechanized mining face laying scraper chain turning device according to claim 1, characterized in that, Also includes: A support plate is inclinedly disposed on the base and located below the roller. The upper end of the support plate is connected to the rectangular frame structure of the base, and the lower end extends inclinedly towards the ground to form an inclined smooth transition surface for supporting and guiding the drooping scraper chain and preventing the scraper chain from rubbing against or piling up with the base.

Images