A flight chain assembly for an en masse flight conveyor

Abstract

The utility model relates to a plate chain assembly for buried scraper conveyor, the plate chain assembly includes a plurality of pairs of staggered hinged inner chain plate and outer chain plate, the outer side of outer chain plate is the mounting surface, and the mounting surface is provided with the guide groove, and the guide groove one end penetrates the outer chain plate and forms the open end, and one end is the closed end, the composite scraper is slidably arranged in the guide groove of outer chain plate, one end in the length direction of composite scraper is the mounting end, and the mounting end is slidably arranged in the guide groove, and the length direction of composite scraper is perpendicular to the board surface of outer chain plate, the mounting end is provided with the fixed mechanism, and the fixed mechanism can fix the mounting end of composite scraper in the guide groove, the working surface of composite scraper can expand and become bigger.

Description

Technical Field

[0001] This utility model relates to the field of chains for buried scraper conveyors, and more particularly to a plate chain assembly for buried scraper conveyors. Background Technology

[0002] A submerged scraper conveyor is a type of transport equipment that continuously conveys bulk materials within a closed rectangular cross-section shell using a moving scraper chain. Its unique feature is that the scraper chain is completely submerged in the conveyed material during the conveying process, hence the name "submerged scraper conveyor." This equipment relies on the internal friction of the material and the lateral pressure exerted by the shell on the material. During horizontal conveying, the material experiences internal friction due to the pressure of the scraper chain in the direction of movement and its own weight. During vertical conveying, the material's arching characteristics, the thrust of the scraper chain, and the resistance from the lower material to the upper material create lateral pressure, resulting in a continuous flow of material being conveyed.

[0003] Traditional buried scraper conveyor scraper chains mainly adopt a plate chain structure, such as Chinese patent publication number CN222208808U, which uses pins to hinge a series of chain plates to form a chain. The scraper is usually fixed to the outside of the chain plate by welding, and the welding connection makes the scraper and the chain an integral whole.

[0004] Welded connections cause the following problems with existing plate chain assemblies: Welded connections make the scraper and chain plate a single unit, which is extremely inconvenient when replacement or adjustment is needed. The tension of the chain in the machine has been adjusted. If the scraper specifications need to be changed or the spacing of the scrapers needs to be adjusted, the chain plate needs to be disassembled, which means that the overall tension of the chain needs to be readjusted.

[0005] Therefore, there is an urgent need for a plate chain assembly for buried scraper conveyors to solve the above-mentioned technical problems. Utility Model Content

[0006] To address the defects caused by welding the scraper and chain plate in the existing technology, this utility model proposes a plate chain assembly for buried scraper conveyors, the technical solution of which is as follows;

[0007] A plate chain assembly for a scraper conveyor, the plate chain assembly comprising several pairs of staggered hinged inner chain plates and outer chain plates, the outer side of the outer chain plate being a mounting surface, the mounting surface having a guide groove, one end of the guide groove penetrating the outer chain plate to form an open end, and the other end being a closed end;

[0008] A composite scraper is slidably disposed in the guide groove of the outer chain plate. One end of the composite scraper in the length direction is the mounting end, which is slidably disposed in the guide groove. The length direction of the composite scraper is perpendicular to the surface of the outer chain plate.

[0009] The mounting end is equipped with a fixing mechanism, which can fix the mounting end of the composite scraper in the guide groove;

[0010] The working surface of the composite scraper can be expanded.

[0011] Furthermore, the axis of the guide groove is perpendicular to the direction of chain movement.

[0012] Furthermore, the guide groove is a dovetail groove, and the mounting end of the composite scraper is provided with a dovetail-shaped protrusion that conforms to the dovetail groove.

[0013] Furthermore, the fixing mechanism includes fixing ears provided on both sides of the mounting end. When the composite scraper slides to the bottom of the guide groove through the mounting end, the fixing ears are attached to the top surface of the outer chain plate. The top surface of the outer chain plate is provided with a pair of first threaded holes, and the fixing ears are provided with a pair of fixing through holes corresponding to the first threaded holes. The scraper can be locked by screwing a screw through the fixing through holes into the first threaded holes.

[0014] Furthermore, the composite scraper is divided into a welcoming surface and a back surface, with the welcoming surface being inclined upward relative to the material.

[0015] Furthermore, the back surface of the composite scraper is provided with a groove, which is parallel to the front surface and extends through the top of the scraper to form a clearance opening. An extension plate is slidably disposed in the groove, which can protrude out of the clearance opening to increase the front surface. The extension plate is provided with a fixing structure to fix the extension plate in a designated position in the groove.

[0016] Furthermore, the expansion plate has a locking hole on its body, and the bottom surface of the slide groove has a number of second threaded holes along its own axis. The expansion plate can slide so that the locking hole corresponds to the second threaded hole one by one.

[0017] The beneficial effects of this utility model are as follows: The scraper, guided by a dovetail groove and secured with screws, replaces traditional welding, enabling rapid installation and disassembly that can be completed by a single person. This greatly simplifies the scraper replacement or spacing adjustment process, avoiding the tedious operation of readjusting the tension of the entire chain due to replacing a partial scraper, and shortening equipment downtime. Simultaneously, the sliding groove and extension plate structure on the back of the scraper allows for continuous adjustment of the material-facing surface width via simple bolt positioning, enabling the same conveyor to flexibly adapt to the conveying needs of materials with different characteristics (such as powdery, granular, or lumpy materials), thus improving the equipment's versatility. Furthermore, the upward-sloping design of the scraper's material-facing surface effectively suppresses the "floating chain" phenomenon, ensuring stable chain operation along the trough bottom. The combined scraper layout further optimizes the dust removal effect, reducing the risk of chain misalignment or wear caused by material caking in the trough, thereby extending the chain's service life. Attached Figure Description

[0018] Figure 1 This is a top view of the connection diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a first lateral schematic diagram of the outer chain plate and scraper according to an embodiment of the present utility model;

[0020] Figure 3 This is a second lateral schematic diagram of the outer chain plate and scraper in an embodiment of the present utility model.

[0021] In the above figures: inner chain plate 1, outer chain plate 2, guide groove 21, first threaded hole 22, composite scraper 3, dovetail protrusion 31, fixing ear 32, fixing through hole 321, material receiving surface 33, material backing surface 34, slide groove 341, second threaded hole 342, expansion plate 5, locking hole 51. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, a plate chain assembly for a scraper conveyor includes several pairs of staggered hinged inner chain plates 1 and outer chain plates 2. The outer surface of the outer chain plate 2 is a mounting surface, and a guide groove 21 is formed on the mounting surface. One end of the guide groove 21 passes through the outer chain plate 2 to form an open end, and the other end is a closed end. A composite scraper 3 is slidably disposed in the guide groove 21 of the outer chain plate 2. One end of the composite scraper 3 in the length direction is the mounting end, which is slidably disposed in the guide groove 21. The length direction of the composite scraper 3 is perpendicular to the plate surface of the outer chain plate 2. A fixing mechanism is provided at the mounting end, which can fix the mounting end of the composite scraper 3 in the guide groove 21. The working surface of the composite scraper 3 can be expanded and enlarged.

[0024] like Figure 1 As shown in the figure, preferably, the axis of the guide groove 21 is perpendicular to the direction of chain movement, which facilitates the installation of the composite scraper 3.

[0025] like Figure 1 As shown, preferably, the guide groove 21 is a dovetail groove, and the mounting end of the composite scraper 3 is provided with a dovetail-shaped protrusion 31 conforming to the dovetail groove. The mating structure of the dovetail groove can effectively prevent the composite scraper 3 from coming off laterally when subjected to material pressure. Chamfers are provided at the junctions of the surfaces within the dovetail groove, and chamfers are also provided at the junction between the main body of the composite scraper 3 and the dovetail-shaped protrusion 31, ensuring the mechanical strength and reliability of the connection.

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the fixing mechanism includes fixing ears 32 provided on both sides of the mounting end. When the composite scraper 3 slides to the bottom of the guide groove 21 through the mounting end, the fixing ears 32 fit against the top surface of the outer chain plate 2. The top surface of the outer chain plate 2 has a pair of first threaded holes 22, and the fixing ears 32 have a pair of fixing through holes 321 corresponding to the first threaded holes 22. Screws can be screwed into the first threaded holes 22 through the fixing through holes 321 to lock the scraper. This fixing mechanism has a simple structure, and only a few screws need to be tightened or loosened to achieve the fastening and disassembly of the scraper, realizing the purpose of quick assembly and disassembly and greatly simplifying the maintenance process.

[0027] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the composite scraper 3 is divided into a welcoming surface 33 and a back surface 34, with the welcoming surface 33 being inclined upward relative to the material. This inclined surface design allows the scraper to generate a vertically upward component force on the material during operation, avoiding excessive resistance to the scraper and effectively suppressing the "floating chain" problem that may occur when the chain is at high speed or under light load, thus ensuring stable chain operation.

[0028] like Figure 2 , Figure 3 As shown, preferably, the back surface 34 of the composite scraper 3 has a groove 341, which is parallel to the receiving surface 33 and extends through the top of the scraper to form a clearance opening. An extension plate 5 is slidably disposed within the groove 341, extending upwards beyond the clearance opening to increase the receiving surface 33. The extension plate 5 is also equipped with a fixing structure to secure it to a designated position within the groove 341. This design allows users to flexibly adjust the effective working width of the scraper according to the characteristics of the conveyed material and flow requirements, enhancing the equipment's adaptability to different working conditions and achieving multi-purpose functionality.

[0029] like Figure 2 , Figure 3 As shown, preferably, the extension plate 5 has locking holes 51 on its body, and the bottom surface of the slide groove 341 has several second threaded holes 342 along its own axis. The extension plate 5 can slide so that the locking holes 51 correspond one-to-one with the second threaded holes 342. By fixing it with bolts passing through different locking holes 51, a simple, reliable and precisely limited adjustment method is provided to ensure that the extension plate 5 will not be displaced under stress.

[0030] First, determine the required working width of the scraper based on the characteristics of the conveyed material. By sliding the extension plate 5, align its locking hole 51 with the corresponding second threaded hole 342 on the bottom surface of the composite scraper 3's groove 341, and secure it with bolts to adjust the overall width of the composite scraper 3. Then, slide the adjusted mounting end (dovetail protrusion 31) of the composite scraper 3 axially into the guide groove 21 of the outer chain plate 2 until the fixing ear 32 fits against the top surface of the outer chain plate 2. Finally, use a screw to pass through the fixing through hole 321 on the fixing ear 32 and screw it into the first threaded hole 22 on the top surface of the outer chain plate 2, tightening it to complete the installation of a single scraper. Repeat this process to install all composite scrapers 3 onto each outer chain plate 2 of the chain (the installation interval can be adjusted according to actual production conditions, such as installing one composite scraper 3 every certain number of outer chain plates 2). When replacement or readjustment is required, simply loosen the screws and slide the scraper out; there is no need to disassemble the entire chain or readjust the chain tension.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A plate chain assembly for a scraper conveyor, the plate chain assembly comprising a plurality of pairs of staggered hinged inner chain plates (1) and outer chain plates (2), characterized in that: The outer side of the outer chain plate (2) is the mounting surface, and the mounting surface is provided with a guide groove (21). One end of the guide groove (21) passes through the outer chain plate (2) to form an open end, and the other end is a closed end. A composite scraper (3) is slidably disposed in the guide groove (21) of the outer chain plate (2). One end of the composite scraper (3) in the length direction is the mounting end, and the mounting end is slidably disposed in the guide groove (21). The length direction of the composite scraper (3) is perpendicular to the plate surface of the outer chain plate (2). The mounting end is provided with a fixing mechanism, which can fix the mounting end of the composite scraper (3) in the guide groove (21); The working surface of the composite scraper (3) can be expanded.

2. The plate chain assembly for a buried scraper conveyor according to claim 1, characterized in that: The axis of the guide groove (21) is perpendicular to the direction of chain movement.

3. The plate chain assembly for a buried scraper conveyor according to claim 1, characterized in that: The guide groove (21) is a dovetail groove, and the mounting end of the composite scraper (3) is provided with a dovetail-shaped protrusion (31) that conforms to the dovetail groove.

4. The plate chain assembly for a buried scraper conveyor according to claim 1, characterized in that: The fixing mechanism includes fixing ears (32) provided on both sides of the mounting end. When the composite scraper (3) slides to the bottom of the guide groove (21) through the mounting end, the fixing ears (32) fit against the top surface of the outer chain plate (2). The top surface of the outer chain plate (2) is provided with a pair of first threaded holes (22). The fixing ears (32) are provided with a pair of fixing through holes (321) corresponding to the first threaded holes (22). The scraper can be locked by screwing a screw through the fixing through holes (321) into the first threaded holes (22).

5. The plate chain assembly for a buried scraper conveyor according to claim 1, characterized in that: The composite scraper (3) is divided into a receiving surface (33) and a back surface (34), and the receiving surface (33) is inclined upward relative to the material.

6. The plate chain assembly for a buried scraper conveyor according to claim 5, characterized in that: The back surface (34) of the composite scraper (3) is provided with a groove (341), the groove (341) is parallel to the receiving surface (33), and the groove (341) passes through the top of the scraper to form a clearance opening. An extension plate (5) is slidably arranged in the groove (341). The extension plate (5) can protrude out of the clearance opening to increase the receiving surface (33). A fixing structure is provided on the extension plate (5) to fix the extension plate (5) at a designated position in the groove (341).

7. The plate chain assembly for a buried scraper conveyor according to claim 6, characterized in that: The expansion plate (5) has a locking hole (51) on its body, and the bottom surface of the slide groove (341) has a plurality of second threaded holes (342) along its own axis. The expansion plate (5) can slide so that the locking hole (51) and the second threaded hole (342) correspond one by one.

Images