Scraper chain pressing device for coal preparation plant
By designing a chain press device on the scraper machine and using the design of the pressure plate and the flow guide end, the problem of floating chain during long-distance transportation of the scraper is solved, which improves the conveying efficiency and reduces the number of equipment shutdowns.
Patent Information
- Application Number
- CN202421668007.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-15
AI Technical Summary
Existing scrapers have floating chain problems during long-distance transportation, which affects the conveying efficiency.
A scraper chain pressing device is designed, including a fixed plate, a pressing plate and a flow guide end. The pressing plate is in contact with the scraper chain in a limit contact, and the movement of the pressing plate and the passage of the coal block is achieved through the spring and guide column. The flow guide end prevents the coal block from entering the gap and limits the scraper chain to be recovered.
It effectively avoids the problem of drifting chains of scraper chains, reduces the number of blockages and shutdowns of scraper machines, and improves transportation efficiency and equipment service life.
Smart Images
Figure CN222934567U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of scraper conveyors, and particularly to a chain pressing device for a scraper conveyor used in a coal preparation plant. Background Art
[0002] Scraper conveyors are commonly used transportation equipment in coal preparation plants, mainly used for the transportation of coal mining faces and gateways in the mining areas, and can also be used in the driving faces of coal roadways and semi-coal rock roadways.
[0003] The working principle of a scraper conveyor is mainly to use a sprocket to drive the chain to move. The scraper on the chain contacts the pulp or material, scrapes it out from one place and transports it along the direction of the scraper to below the machine body. The scraper below the machine body is driven by a sprocket and continuously transports the material towards the head of the machine. A scraper conveyor usually consists of a driving device, a conveying device and a casing. Among them, the driving device includes a motor, a reducer, a driving sprocket, etc., which provides power for the operation of the scraper conveyor; the conveying device includes a driving sprocket, a driven sprocket, a scraper chain, etc., which are the key components for the scraper conveyor to realize material transportation.
[0004] However, the body of the scraper conveyor is generally very long, even up to dozens of meters. For long-distance scraper transportation, due to the long distance between the head sprocket and the tail sprocket, there is a problem of chain floating during the operation of the scraper, which affects the conveying efficiency.
[0005] The information disclosed in this background art section is only used to deepen the understanding of the background art of the present disclosure, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention
[0006] In view of at least one of the above technical problems, the present disclosure provides a chain pressing device for a scraper conveyor used in a coal preparation plant, aiming to solve the technical problem that the existing scraper conveyor has chain floating during long-distance transportation, which affects the conveying efficiency.
[0007] According to one aspect of the present disclosure, there is provided a chain pressing device for a scraper conveyor used in a coal preparation plant. This chain pressing device for the scraper conveyor is equidistantly arranged above the scraper chain and fixedly connected to the inner wall of the casing of the scraper conveyor. The chain pressing device for the scraper conveyor includes a fixing plate for fixedly connecting with the casing of the scraper conveyor. The fixing plate includes a horizontal plate arranged above the scraper chain; a pressing plate for limiting the scraper chain and moving up and down along a direction perpendicular to the horizontal plate is arranged below the horizontal plate. A spring is arranged between the pressing plate and the horizontal plate; the two ends of the pressing plate are provided with diversion end heads that are upturned towards the side of the fixing plate.
[0008] In some embodiments of the present disclosure, the fixing plate is an L-shaped plate.
[0009] In some embodiments of the present disclosure, reinforcing rib plates are respectively arranged on both ends of the fixing plate.
[0010] In some embodiments of the present disclosure, at least two guide posts perpendicular to the pressing plate are provided at the pressing plate, and through holes matching the guide posts are provided at the fixing plate.
[0011] In some embodiments of the present disclosure, the spring is sleeved outside the guide post, and a limit nut for adjusting the distance between the fixing plate and the pressing plate is threadedly connected to the end of the guide post.
[0012] In some embodiments of the present disclosure, the two ends of the spring are fixedly connected to the pressing plate and the cross plate respectively.
[0013] One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:
[0014] 1. By means of the pressing plate relatively fixed directly above the cover chain corresponding to the inner wall of the scraper conveyor housing, the limit of the scraper chain is realized, thereby avoiding the problem of the scraper chain floating.
[0015] 2. The pressing plate can move in the vertical direction through the spring, so that coal blocks with a certain particle size are allowed to pass between the pressing plate and the scraper chain, thereby greatly reducing the number of shutdowns after the scraper conveyor is jammed, and thus ensuring the working transportation efficiency of the scraper conveyor.
[0016] 3. Flow guiding ends are provided on both sides of the pressing plate. On the one hand, it can prevent coal blocks from entering the gap between the cross plate and the pressing plate, resulting in the problem of relative movement jamming between the cross plate and the pressing plate; on the other hand, the flow guiding ends serve as a transition section, so that the scraper chain with floating chain is gradually limited and recovered under the action of the flow guiding ends to below the pressing plate, avoiding the problem that the end of the pressing plate directly contacts and interferes with the scraper chain, resulting in damage to the chain. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of a chain pressing device of a scraper conveyor in an embodiment of the present application.
[0018] Figure 2 It is a schematic diagram of the use state of a chain pressing device of a scraper conveyor in an embodiment of the present application.
[0019] In the above figures, 1 is a fixing plate, 11 is a cross plate, 12 is a reinforcing rib plate, 2 is a pressing plate, 21 is a flow guiding end, 3 is a guide post, 31 is a limit nut, 4 is a spring, 5 is a scraper conveyor housing, 6 is a scraper chain, and 7 is a chain pressing device. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0021] To better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the drawings of the specification and specific implementation manners.
[0022] To solve the technical problem that the existing scraper conveyor affects the transportation efficiency and reliability due to chain floating during long-distance transportation, this example discloses a chain pressing device for a coal preparation plant scraper conveyor. See Figure 1 , the chain pressing device of the scraper conveyor includes a fixing plate 1 fixedly connected to the inner wall of the scraper conveyor housing. Through this fixing plate 1, the chain pressing device of the scraper conveyor is fixedly connected to the inner wall of the scraper conveyor housing directly above the scraper chain. In this embodiment, the fixing plate 1 is an L-shaped plate. The L-shaped fixing plate includes a side plate and a cross plate 11 that are perpendicular to each other. Among them, the side plate is used for fixed connection with the scraper conveyor housing. In this example, the side plate is welded to the inner wall of the scraper conveyor housing. In some other embodiments, for the convenience of repairing the chain pressing device, the side plate is bolted to the inner wall of the scraper conveyor housing to facilitate disassembly. In addition, considering that the fixing plate 1 of the chain pressing device is arranged directly above the scraper chain, when the scraper chain floats or there is a blockage of coal between the chain pressing device and the chain, the fixing plate will be subjected to a force in the vertical direction. There is a risk of deformation due to force during long-term use of the fixing plate 1. For this reason, in this embodiment, reinforcing ribs are fixedly arranged between the side plates and the cross plate on both sides of the fixing plate 1 to enhance the structural strength of the fixing plate and extend the service life of the fixing plate. In addition, in this embodiment, after the side plate of the fixing plate 1 is fixedly connected to the inner wall of the scraper conveyor housing, the cross plate is in a horizontal state.
[0023] To enable the reset of the scraper chain after floating, see Figure 1, a pressing plate 2 is provided below the fixing plate 1. The pressing plate 2 is parallel and horizontally arranged with the cross plate of the fixing plate 1. The pressing plate 2 is arranged directly above the scraper chain. Through the contact between the pressing plate 2 and the scraper chain, the limiting of the scraper chain and the reset after the scraper chain floats are realized. However, in the actual use process, since the scraper chain cannot travel along a straight line during operation and there must be a certain degree of jitter, it is impossible for the pressing plate 2 and the scraper chain to be in close contact. As a result, the wear of the pressing plate 2 and the scraper chain will be accelerated, and the service life of both will be reduced. However, the gap between the pressing plate 2 and the scraper chain easily allows the transported coal to fall into it, which is very likely to cause the scraper chain to jam, resulting in the sprocket drive being stuck and requiring manual inspection, affecting the working efficiency of the scraper conveyor. For this reason, in this embodiment, see Figure 1 , two guide posts 3 are provided on the top surface of the pressing plate 2. The guide posts 3 are perpendicular to the pressing plate. Correspondingly, through holes corresponding to the two guide posts 3 are opened at the cross plate 11 of the fixing plate 1 for passing through the guide posts 3 to realize the up and down movement of the pressing plate 2 along the direction of the guide posts after being stressed.
[0024] In some other embodiments, the guide posts 3 are directly passed through the two through holes of the cross plate 11. Then the acting force for the pressing plate to press the scraper chain only comes from the self-weight of the pressing plate 2. Therefore, in this example, the pressing plate 2 has a certain weight, and this weight can press the scraper chain that has floated. In this embodiment, considering that when the pressing plate directly contacts the scraper chain by its own gravity, although the chain can be pressed, there is a problem of wear due to direct contact between the two. For this reason, in this example, a spring 4 is sleeved outside the guide post 3 between the cross plate 11 and the pressing plate 3, and an external thread is provided outside the guide post 3. A limit nut 31 is threadedly connected to the end of the guide post 3. The limit nut 31 is arranged above the cross plate 11 and is in close contact with the cross plate 11. Thus, through the elastic force of the spring 4 and the limitation of the limit nut 31, when a coal block enters between the pressing plate 2 and the scraper chain and is stressed, the pressing plate 2 can move upward a certain distance along the guide post 3, so that the coal block passes through the chain pressing device, thereby reducing the number of shutdowns of the scraper conveyor after jamming and improving the working efficiency of the scraper conveyor on the premise of realizing chain pressing. After the coal block between the pressing plate 2 and the scraper chain passes through due to the upward movement of the pressing plate 2, under the elastic force of the spring 4, the pressing plate 2 resets and continues to realize the limiting of the scraper chain. In some other embodiments, the two ends of the spring are directly fixedly connected to the pressing plate and the cross plate respectively.
[0025] In this embodiment, see Figure 1, on both sides of the pressing plate 2, there are diversion ends 21. The diversion ends 21 form a certain angle with the plane where the plate body of the pressing plate is located and are upturned towards the fixed plate. Thus, on the one hand, the diversion ends 21 can prevent coal blocks from entering the gap between the cross plate and the pressing plate along with the movement of the scraper, thereby avoiding the problem of relative movement jamming between the cross plate and the pressing plate and preventing the spring from failing due to this; on the other hand, the diversion ends 21 serve as a transition section, enabling the scraper chain that has a floating chain to be gradually limited and recovered under the action of the diversion ends to the lower part of the pressing plate 2, avoiding the direct contact and interference between the end of the pressing plate and the scraper chain, and thus preventing the chain from being damaged.
[0026] See Figure 2 , when the chain pressing device of the scraper conveyor is in use, the chain pressing devices 7 are arranged in an equidistant array directly above the scraper chain pressing 6 and are fixedly connected to the inner wall of the scraper conveyor housing 5 through the side plates of the fixed plate, and a certain spacing is left between the pressing plate 2 and the scraper chain pressing 6. Additionally, in some other embodiments, considering that there are a large number of chain pressing devices arranged, when coal blocks are jammed between the pressing plate and the scraper chain, resulting in the shutdown of the scraper conveyor, it is necessary to manually check one by one, and the maintenance efficiency is low. Therefore, in this example, a pressure sensor is arranged between the limit nut and the cross plate, or between the cross plate and the spring, or between the spring and the pressing plate. Thus, by comparing the pressure measurement values of each chain pressing device, it can be determined that the chain pressing device corresponding to the maximum pressure value has a jam, and an alarm is given accordingly, thereby greatly improving the inspection efficiency after shutdown.
[0027] Although some preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.
[0028] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the inventive concept of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. A chain pressing device for a scraper conveyor used in a coal preparation plant, characterized in that: The scraper conveyor chain pressure device is arranged at equal intervals above the scraper conveyor chain and is fixedly connected to the inner wall of the scraper conveyor casing. The scraper conveyor chain pressure device includes a fixed plate used to be fixedly connected to the scraper conveyor casing, and the fixed plate includes a horizontal plate horizontally arranged above the scraper conveyor chain; a pressure plate is provided below the horizontal plate for limiting the scraper conveyor chain and moving up and down in a direction perpendicular to the horizontal plate, and a spring is provided between the pressure plate and the horizontal plate; guide ends are provided at both ends of the pressure plate, which are upwardly tilted toward the fixed plate side.
2. The scraper conveyor chain pressing device according to claim 1, characterized in that: The fixing plate is an L-shaped plate.
3. The scraper chain pressing device according to claim 2, characterized in that: Reinforcement ribs are respectively arranged on both end sides of the fixing plate.
4. The scraper conveyor chain pressing device according to claim 1, characterized in that: The pressing plate is provided with at least two guide posts perpendicular to the pressing plate, and the fixing plate is provided with through holes matching the guide posts.
5. The scraper conveyor chain pressing device according to claim 4, characterized in that: The spring is passed through the outside of the guide column, and a limiting nut for adjusting the distance between the fixing plate and the pressing plate is correspondingly threadedly connected at the end of the guide column.
6. The scraper chain pressing device according to claim 1, characterized in that: The spring is fixedly connected to the pressure plate and the transverse plate at both ends.