Medium drainage screen for screening coal
By designing the inclined screening plate and receiving plate structure of the coal desliming screen, the problems of large feed bin weight and easy clogging of screen holes were solved, achieving uniform material guidance and efficient desliming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-24
AI Technical Summary
The existing coal screening desliming screens have a buffer trough at the bottom of the feed hopper, which results in heavy weight, high cost, poor material flow, and easy clogging of the screen holes.
Design a coal desliming screen with an inclined screen plate and receiving plate structure, eliminating the buffer tank. The material enters the receiving plate directly from the feed inlet and then slides to the screen plate. Combined with the guide plate and collection tank, it ensures uniform material guidance and desliming effect.
It reduces the weight and cost of the feed hopper, avoids material accumulation, improves material flow and desliming efficiency, and reduces screen clogging.
Smart Images
Figure CN224025586U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of coal processing, and more specifically, relates to a desliming screen for screening coal. Background Technology
[0002] Coal screening desliming screens are key equipment in the coal washing process, mainly used to separate coal from media. When selecting a screen, factors such as particle size, throughput, efficiency, and maintenance must be comprehensively considered to ensure the efficient operation of the coal screening desliming screen.
[0003] The existing coal screening desliming screens have the following main problems: the bottom of the feed hopper is equipped with a buffer trough, the feed hopper is heavy and costly, the material will accumulate in the buffer trough, and the material flow effect in the buffer trough is poor; when using a screen for screening, the screen holes are easy to get clogged. Summary of the Invention
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a coal desliming screen. The technical solution adopted in this application is as follows:
[0005] A coal screening desliming screen includes a screening mechanism, which has a feed bin and a screening channel. The feed bin is located at the rear end of the screening channel and is connected to the screening channel. A screening plate is provided at the bottom of the screening channel. The screening plate gradually slopes downward from back to front. A receiving plate is provided at the rear end of the screening plate and is smoothly connected to the screening plate. A feed inlet is provided at the upper end of the feed bin, and the receiving plate is located below the feed inlet.
[0006] Optionally, the receiving plate covers the bottom of the feed hopper.
[0007] Optionally, both the receiving plate and the screening plate can be screens of the same specifications.
[0008] Optionally, a guide plate is also provided inside the feed hopper, which is located between the feed inlet and the receiving plate.
[0009] Optionally, the guide plate gradually slopes downward from front to back, and a guide opening is provided between the rear end of the guide plate and the rear side wall of the feed hopper.
[0010] Optionally, the screening mechanism is further provided with a collection tank, which includes a first collection tank and a second collection tank; the first collection tank is located directly below the screening plate, and the second collection tank is located in front of and below the screening plate.
[0011] Optionally, the receiving plate can be detachably installed inside the feed hopper.
[0012] Optionally, the coal screening desliming screen also includes a support base, on which the feed bin and screening channel are both installed.
[0013] The advantages of this utility model are as follows:
[0014] Material enters the feeding hopper through the inlet and falls onto the receiving plate. The material smoothly transitions onto the screening plate and slides forward along the screening plate for desliming. The receiving plate is located at the bottom of the feeding hopper, eliminating the need for a buffer trough at the bottom of the feeding hopper and preventing material accumulation in the buffer trough, which greatly reduces the weight of the feeding hopper.
[0015] The guide plate gradually tilts downwards from front to back, which can evenly guide the material to the rear end of the guide plate, increase the desizing distance, and thus ensure the desizing effect. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a coal desliming screen;
[0018] Figure 2 This is a schematic diagram of the feed hopper.
[0019] Explanation of symbols in the diagram:
[0020] 1 is the screening mechanism, 11 is the feeding hopper, 111 is the feeding port, 112 is the guide plate, 113 is the guide port, 12 is the screening channel, 121 is the screening plate, 122 is the receiving plate, 13 is the collection tank, 131 is the first collection tank, 132 is the second collection tank, 14 is the discharge channel, and 141 is the buffer plate.
[0021] 2 is the support base. Detailed Implementation
[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0023] like Figures 1 to 2As shown, a coal screening desliming screen includes a screening mechanism 1. The screening mechanism 1 is provided with a feed bin 11 and a screening channel 12. The feed bin 11 is located at the rear end of the screening channel 12 and is connected to the screening channel 12. The bottom of the screening channel 12 is provided with a screening plate 121, which gradually slopes downward from back to front. The rear end of the screening plate 121 is provided with a receiving plate 122, which is smoothly connected to the screening plate 121. The upper end of the feed bin 11 is provided with a feed inlet 111, and the receiving plate 122 is located below the feed inlet 111.
[0024] Material enters the feeding hopper 11 through the feed inlet 111 and falls onto the receiving plate 122. The material smoothly transitions from the receiving plate 122 to the screening plate 121 and slides forward along the screening plate 121 for desliming. The receiving plate 122 is located at the bottom of the feeding hopper 11, eliminating the need for a buffer trough at the bottom of the feeding hopper 11 and preventing material accumulation in the buffer trough, which greatly reduces the weight of the feeding hopper 11.
[0025] The receiving plate 122 covers the bottom of the feeding hopper 11, which can prevent materials from sliding down the edge of the receiving plate 122.
[0026] Both the receiving plate 122 and the screening plate 121 are made of the same specifications, and they work together to filter the material. In this embodiment, the receiving plate 122 and the screening plate 121 can be made of stainless steel slotted screen or stainless steel corrugated screen, which gives them the advantages of wear resistance and non-clogging, maintaining a good desliming effect. The edges of both the receiving plate 122 and the screening plate 121 are edged, and in this embodiment, the edged edges are made of polyurethane material.
[0027] The feed hopper 11 is also equipped with a guide plate 112, which is located between the feed inlet 111 and the receiving plate 122. This guide plate 112 can prevent materials from falling directly onto the receiving plate 122 and can protect the receiving plate 122.
[0028] The guide plate 112 gradually slopes downward from front to back, and a guide opening 113 is provided between the rear end of the guide plate 112 and the rear side wall of the feed hopper 11. The guide plate 112 gradually slopes downward from front to back, which can guide the material evenly to the rear end of the guide plate 112 through the guide opening 113, thereby increasing the desliming distance and ensuring the desliming effect.
[0029] The screening mechanism 1 is also provided with a collection tank 13, which has a first collection tank 131 and a second collection tank 132. The first collection tank 131 is located directly below the screening plate 121, and the second collection tank 132 is located in front of and below the screening plate 121. Above the second collection tank 132, there is also an outlet pipe 14, and a buffer plate 141 is provided inside the outlet pipe 14. The buffer plate 141 gradually slopes downward from the outside to the inside to reduce the falling speed of the material and prevent the material from impacting the equipment in front.
[0030] The receiving plate 122 is detachably installed inside the feeding hopper 11. If the receiving plate 122 is damaged, it can be replaced separately, further reducing maintenance and replacement costs.
[0031] The coal screening desliming screen also includes a support base 2, and the feed bin 11 and screening channel 12 are all installed on the support base 2.
[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A coal desliming screen, comprising a screening mechanism, characterized in that, The screening mechanism is provided with a feeding bin and a screening channel. The feeding bin is located at the rear end of the screening channel and is connected to the screening channel. The bottom of the screening channel is provided with a screening plate, which gradually slopes downward from back to front. The rear end of the screening plate is provided with a receiving plate, which is smoothly connected to the screening plate. The upper end of the feeding bin is provided with a feeding port, and the receiving plate is located below the feeding port.
2. The coal desliming screen according to claim 1, characterized in that, The receiving plate covers the bottom of the feed hopper.
3. The coal desliming screen according to claim 2, characterized in that, Both the receiving plate and the screening plate are made of the same specifications.
4. The coal desliming screen according to any one of claims 1 to 3, characterized in that, The feed hopper is also equipped with a guide plate, which is located between the feed inlet and the receiving plate.
5. The coal desliming screen according to claim 4, characterized in that, The guide plate gradually slopes downward from front to back, and a guide opening is provided between the rear end of the guide plate and the rear side wall of the feed hopper.
6. The coal desliming screen according to any one of claims 1 to 3, characterized in that, The screening mechanism is further provided with a collection tank, which includes a first collection tank and a second collection tank; the first collection tank is located directly below the screening plate, and the second collection tank is located in front of and below the screening plate.
7. The coal desliming screen according to any one of claims 1 to 3, characterized in that, The receiving plate is detachably installed inside the feeding hopper.
8. The coal desliming screen according to any one of claims 1 to 3, characterized in that, It also includes a support base, on which both the feed hopper and the screening channel are mounted.