Roller screen for coal conveying system of thermal power plant

Abstract

This utility model discloses a roller screen for a coal conveying system in a thermal power plant, relating to the technical field of roller screens for coal conveying systems in thermal power plants. The utility model includes a roller screen outer shell frame, with a feed inlet installed at the top center of the frame. A large-item separating roller is installed inside the feed inlet. A shaft is provided inside the large-item separating roller, and a partition is connected to the rear side of the shaft. This utility model allows coal to be fed into the feed inlet. Large pieces of coal slide onto the large-item roller screen through the separating roller, where they are screened. Smaller pieces fall onto the roller screen through the gaps in the separating roller, where they are screened. This separation of large and small pieces improves the quality of the large-item roller screen, reduces wear on the roller screen, lowers maintenance difficulty and cost, and significantly extends the equipment's service life.

Description

Technical Field

[0001] This utility model belongs to the field of roller screens for coal conveying systems in thermal power plants, specifically, it relates to a roller screen for coal conveying systems in thermal power plants. Background Technology

[0002] In coal conveying systems of thermal power plants, roller screens play a crucial role. Their primary function is to screen raw coal, classifying it according to particle size so that subsequent processing steps can utilize coal of suitable size. For example, coal meeting the combustion requirements of the boiler is screened out and sent to the furnace for combustion, while large pieces of coal or impurities are separated for crushing or cleaning, thus ensuring the efficient and stable operation of the entire coal conveying and combustion system. However, existing roller screen technology in thermal power plant coal conveying systems has several shortcomings. Traditional roller screens often have a relatively simple drive mechanism; if any drive component fails, the entire screen can easily shut down, affecting production continuity. Regarding preventing coal blockage, there is a lack of effective active cleaning mechanisms, which can easily lead to screen hole clogging, reduced screening efficiency, and even blockages in the entire coal conveying system.

[0003] Traditional roller screens in coal conveying systems of thermal power plants have several problems, such as easy damage and low efficiency. These problems not only affect the efficiency and quality of coal conveying but also increase costs and maintenance difficulties. Therefore, developing a roller screen for coal conveying systems in thermal power plants that is less prone to damage and has higher efficiency is of significant practical importance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a roller screen for a coal conveying system in a thermal power plant, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A roller screen for a coal conveying system in a thermal power plant includes: a roller screen outer shell frame; a feed inlet installed at the top center of the outer shell frame; a large object separating roller installed in the inner cavity of the feed inlet; a shaft disposed in the inner cavity of the large object separating roller; a partition plate connected to the rear side of the shaft; a large object roller screen plate disposed on the top rear side of the partition plate; a roller installed in the inner cavity of the large object roller screen plate; a roller screen plate disposed on the bottom front side of the partition plate; a roller installed in the inner cavity of the roller screen plate; a large object motor connected to the right side of the roller in the inner cavity of the large object roller screen plate; a motor mounted on the right side of the outer shell frame; and grooves formed at the top and rear ends of the outer shell frame. An observation and maintenance cover is installed in the inner cavity of each groove, and a handle is connected to the top of the observation and maintenance cover. It should be noted that all electrical equipment involved in this application can be powered by a battery or an external power source.

[0007] Optionally, the motor mounting base is fixedly connected to the outer frame of the roller screen, the large object motor and the motor pass through the motor mounting base on both sides, the large object motor and the motor output shaft are connected to the roller, and the power of the large object motor is greater than that of the motor.

[0008] Optionally, the handle is fixedly connected to the observation and maintenance cover.

[0009] Optionally, the roller extends through the large object roller screen and the roller screen to the left and right sides, and the size and hardness of the large object roller screen are both greater than those of the roller screen.

[0010] Optionally, the shaft passes through the large object separating roller, the top of the shaft is fixedly connected to the inner cavity of the feed inlet, the bottom of the shaft is fixedly connected to the partition plate, the partition plate is fixedly connected to the outer frame of the roller screen, and the large object separating roller can roll under the action of the shaft.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0012] Coal is fed into the inlet. Larger pieces of coal slide onto the large-piece roller screen through the large-piece separating rollers, where they are screened. Smaller pieces, on the other hand, fall onto the roller screen through the gaps in the large-piece separating rollers, where they are screened. This process separates large and small pieces, improving the quality of the large-piece roller screen, reducing wear on the roller screen, lowering maintenance difficulty and costs, and significantly extending the equipment's lifespan.

[0013] Two-way screening and conveying increases output.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of the structure of this utility model;

[0018] Figure 3 This is a right view of the structure of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Roller screen outer frame; 2. Observation and maintenance cover; 3. Handle; 4. Feed inlet; 5. Motor mounting base; 6. Large object roller screen plate; 7. Large object motor; 8. Roller screen plate; 9. Large object separating roller; 10. Shaft; 11. Partition plate; 12. Drum; 13. Groove; 14.

[0021] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Please see Figure 1-3 As shown in the figure, this embodiment provides a roller screen for a coal conveying system in a thermal power plant, including a roller screen outer shell frame 1.

[0024] One application of this embodiment is as follows: A feed inlet 4 is installed at the top center of the roller screen outer shell frame 1. A large object separating roller 10 is installed in the inner cavity of the feed inlet 4. A shaft 11 is provided in the inner cavity of the large object separating roller 10. A partition 12 is connected to the rear side of the shaft 11. A large object roller screen plate 6 is provided on the top rear side of the partition 12. A roller 13 is installed in the inner cavity of the large object roller screen plate 6. A roller screen plate 8 is provided on the bottom front side of the partition 12. A roller 13 is provided in the inner cavity of the roller screen plate 8. A large object motor 7 is connected to the right side of the roller 13 in the inner cavity of the large object roller screen plate 6. A motor 9 is connected to the right side of the roller 13 in the inner cavity of the roller screen plate 8. A motor fixing seat 5 is connected to the right side of the roller screen outer shell frame 1. Grooves 14 are provided at the top rear end and the rear end of the roller screen outer shell frame 1. An observation and maintenance cover 2 is installed in the inner cavity of the groove 14. A handle 3 is connected to the top of the observation and maintenance cover 2. It should be noted that all electrical devices involved in this application can be powered by batteries or external power sources.

[0025] like Figure 1 As shown in this embodiment, the motor mounting base 5 is fixedly connected to the roller screen outer shell frame 1. The large object motors 7 and 9 pass through the motor mounting base 5 on both sides. The output shafts of the large object motors 7 and 9 are connected to the roller 13. The power of the large object motor 7 is greater than that of the motor 9.

[0026] like Figure 1 As shown in this embodiment, the handle 3 is fixedly connected to the observation and inspection cover 2.

[0027] like Figure 2 As shown in this embodiment, the roller 13 extends to the left and right sides, penetrating the large object roller screen 6 and the roller screen 8. The size and hardness of the large object roller screen 6 are both greater than those of the roller screen 8.

[0028] like Figure 3 As shown in this embodiment, the shaft 11 passes through the large object separating roller 10. The top of the shaft 11 is fixedly connected to the inner cavity of the feed inlet 4, and the bottom of the shaft 11 is fixedly connected to the partition plate 12. The partition plate 12 is fixedly connected to the outer frame 1 of the roller screen. The large object separating roller 10 can roll under the action of the shaft 11. Example

[0029] In this embodiment, coal is placed into the feed inlet 4. Large pieces of coal slide onto the large material roller screen 6 through the large material separating roller 10, where they are screened. Smaller pieces fall onto the roller screen 8 through the gaps in the large material separating roller 10, where they are screened. This process separates large and small pieces, improves the quality of the large material roller screen, reduces wear on the roller screen 8, lowers the maintenance difficulty and cost of the equipment, and greatly extends the service life of the equipment. Example

[0030] In this embodiment, bidirectional screening and conveying increases output.

[0031] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A roller screen for a coal conveying system in a thermal power plant, characterized in that, include: A roller screen housing frame (1) is provided with a feed inlet (4) installed at the top center of the roller screen housing frame (1). A large object separating roller (10) is installed in the inner cavity of the feed inlet (4). A shaft (11) is provided in the inner cavity of the large object separating roller (10). A partition (12) is connected to the rear side of the shaft (11). A large object roller screen plate (6) is provided on the top rear side of the partition (12). A roller (13) is installed in the inner cavity of the large object roller screen plate (6). A roller screen plate (8) is provided on the bottom front side of the partition (12). The inner cavity of the roller screen plate (8) is provided with... A roller (13) is provided. A large object motor (7) is connected to the right side of the roller (13) inside the large object roller screen (6). A motor (9) is connected to the right side of the roller (13) inside the roller screen (8). A motor mounting base (5) is connected to the right side of the roller screen outer shell frame (1). Grooves (14) are provided at the top and rear ends of the roller screen outer shell frame (1). An observation and maintenance cover (2) is installed in the inner cavity of the groove (14). A handle (3) is connected to the top of the observation and maintenance cover (2). All electrical equipment can be powered by a battery or an external power source.

2. A roller screen for a coal conveying system in a thermal power plant according to claim 1, characterized in that, The motor mounting base (5) is fixedly connected to the roller screen outer shell frame (1). The large object motor (7) and the motor (9) pass through the motor mounting base (5) from left to right. The output shafts of the large object motor (7) and the motor (9) are connected to the drum (13). The power of the large object motor (7) is greater than that of the motor (9).

3. A roller screen for a coal conveying system in a thermal power plant according to claim 1, characterized in that, The handle (3) is fixedly connected to the inspection and maintenance cover (2).

4. A roller screen for a coal conveying system in a thermal power plant according to claim 1, characterized in that, The roller (13) passes through the large object roller screen (6) and the roller screen (8) and extends to the left and right sides. The size and hardness of the large object roller screen (6) are greater than those of the roller screen (8).

5. A roller screen for a coal conveying system in a thermal power plant according to claim 1, characterized in that, The shaft (11) passes through the large object separating roller (10). The top of the shaft (11) is fixedly connected to the inner cavity of the feed inlet (4). The bottom of the shaft (11) is fixedly connected to the partition (12). The partition (12) is fixedly connected to the outer frame (1) of the roller screen. The large object separating roller (10) can roll under the action of the shaft (11).

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