Pretreatment device for coal screening

Abstract

The utility model provides a pretreatment device for coal screening, and relates to the technical field of coal processing treatment.The pretreatment device comprises a pretreatment pipe, the pretreatment pipe gradually inclines downwards from back to front, a feeding port is formed in the rear end of the pretreatment pipe, and a discharging port is formed in the front end of the pretreatment pipe; the section of the pretreatment pipe is U-shaped; the pretreatment pipe gradually inclines downwards from back to front, and the flux of a medium in the pretreatment pipe can be controlled on the premise of ensuring that the medium smoothly passes through the pretreatment pipe by controlling the inclination angle of the pretreatment pipe; the bottom surface of the pretreatment pipe is a smooth curved surface, and a smooth chamfer is formed at the joint of the bottom plate and the side wall and is matched with the inclined angle of the pretreatment pipe, so that the material can smoothly pass through the pretreatment pipe, and the pretreatment pipe is prevented from being blocked; a medium normally flows forwards in the pretreatment pipe and can drive the detection plate to continuously swing back and forth, and when the detector detects that the detection plate stops swinging, an alarm signal of blockage in the pretreatment pipe can be generated.

Description

Technical Field

[0001] This application belongs to the technical field of coal processing, and more specifically, relates to a pretreatment device for coal screening. Background Technology

[0002] Coal preparation plants commonly use wear-resistant pipes and chutes for material conveying, but most of these have limited functionality. Furthermore, the efficiency of the media recovery system directly impacts the operating costs of a coal preparation plant, and the media consumption per ton of coal during the washing process constitutes a significant cost expense.

[0003] The existing coal screening pretreatment devices have the following main problems: the pretreatment pipes are generally square pipes, which often get blocked, resulting in low production efficiency; the lack of a pretreatment process allows smaller coal media to enter the subsequent processes, causing dust pollution; the poor media removal effect makes it difficult to remove media in the subsequent stages, resulting in high system media consumption. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a pretreatment device for coal screening. The technical solution adopted in this application is as follows:

[0005] A coal screening pretreatment device includes a pretreatment pipe that gradually slopes downwards from back to front. The pretreatment pipe has an inlet at its rear end and an outlet at its front end. The pretreatment pipe has a U-shaped cross-section.

[0006] Optionally, a detection port is provided on the upper side of the pretreatment tube.

[0007] Optionally, the pretreatment device is also equipped with a cover plate that closes on the detection port.

[0008] Optionally, the cover plate is hinged to the edge of the detection port, and the edge of the detection port is provided with a hinge.

[0009] Optionally, multiple detection ports are provided and evenly distributed along the axial direction of the pretreatment tube.

[0010] Optionally, the pretreatment device is further provided with a pre-demediation mechanism, which includes a sieve plate and a collection trough, with the collection trough located below the sieve plate; the sieve plate is located on the lower side of the pretreatment pipe and is smoothly connected to the pretreatment pipe.

[0011] Optionally, the pretreatment pipe is provided with a chute section, a desliming section and a transfer section in sequence from back to front, with the desliming section located in the middle and lower part of the pretreatment pipe; the feed inlet is located in the chute section, the screen plate is located in the desliming section, and the discharge outlet is located in the transfer section.

[0012] Optionally, the pretreatment device is also equipped with a detection mechanism, which includes a detection plate and a detector. The detection plate is swaying and hanging inside the pretreatment tube, and the detector is used to monitor the status of the detection plate.

[0013] Optionally, the pretreatment device is further provided with a cleaning mechanism, which is equipped with a cleaning hook that is hung inside the pretreatment pipe.

[0014] Optionally, the pretreatment pipe is also provided with an inner lining layer, which is evenly distributed on the inner surface of the pretreatment pipe; the inner lining layer is made of a wear-resistant material with a low coefficient of friction.

[0015] The advantages of this utility model are as follows:

[0016] The pretreatment pipe gradually slopes downwards from back to front. By controlling the angle of inclination of the pretreatment pipe, the flow rate of the medium in the pretreatment pipe can be controlled while ensuring smooth passage of the medium. The cross-section of the pretreatment pipe is U-shaped, and the bottom surface of the pretreatment pipe is a smooth curved surface. The connection between the bottom plate and the side wall forms a smooth chamfer, which, in conjunction with the angle of inclination of the pretreatment pipe, further ensures that the material can pass through the pretreatment pipe smoothly and avoids blockage of the pretreatment pipe.

[0017] The medium flows forward normally in the pretreatment tube, causing the detection plate to swing back and forth continuously. If the medium blocks the pretreatment tube, the detection plate will be pressed forward and tilted, stopping its swing. The detector detects the back-and-forth swing of the detection plate and generates a signal that the medium is flowing forward normally in the pretreatment tube. When the detector detects that the detection plate has stopped swinging, it generates an alarm signal for blockage in the pretreatment tube. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of a pretreatment device for coal screening;

[0020] Figure 2 This is a schematic diagram of a coal screening pretreatment device from another angle;

[0021] Figure 3 yes Figure 1 Cross-sectional view of AA;

[0022] Figure 4 yes Figure 1 Cross-sectional view of BB.

[0023] Explanation of symbols in the diagram:

[0024] 1 is the pretreatment pipe, 11 is the feed inlet, 12 is the discharge outlet, 13 is the inspection port, 14 is the hinge, 15 is the chute section, 16 is the desliming section, and 17 is the transfer section.

[0025] 2 is the cover plate;

[0026] 3 is the pre-demediation mechanism, 31 is the sieve plate, 32 is the collection tank, and 321 is the discharge port;

[0027] 4 is the detection mechanism, 41 is the detection plate, 42 is the detector, 43 is the detection shaft, and 44 is the bearing housing;

[0028] 5 is the impurity removal mechanism, and 51 is the impurity removal hook. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 3 As shown, a coal screening pretreatment device is provided with a pretreatment pipe 1, which gradually slopes downward from back to front. The rear end of the pretreatment pipe 1 is provided with an inlet 11, and the front end of the pretreatment pipe 1 is provided with an outlet 12. The cross-section of the pretreatment pipe 1 is U-shaped.

[0031] The pretreatment pipe 1 slopes gradually downwards from back to front. By controlling the angle of inclination of the pretreatment pipe 1, the flow rate of the medium in the pretreatment pipe 1 can be controlled while ensuring smooth passage of the medium. The cross-section of the pretreatment pipe 1 is U-shaped, and the bottom surface of the pretreatment pipe 1 is a smooth curved surface. A smooth chamfer is formed at the connection between the bottom plate and the side wall, which, in conjunction with the angle of inclination of the pretreatment pipe 1, further ensures that the material can pass through the pretreatment pipe 1 smoothly and avoids blockage. In this embodiment, the angle of inclination of the pretreatment pipe 1 is 6.3 degrees. Depending on the actual situation of the material and the requirements of subsequent processes, it can also be adjusted to other angles that are not less than 2 degrees and not more than 45 degrees.

[0032] The upper side of the pretreatment tube 1 is provided with a detection port 13, which is used for equipment inspection and maintenance.

[0033] The pretreatment device is also equipped with a cover plate 2, which covers the detection port 13.

[0034] The cover plate 2 is hinged to the edge of the detection port 13. The edge of the detection port 13 is provided with a hinge 14. The cover plate 2 can be easily opened through the hinge 14 to observe the inside of the pretreatment tube 1. If the pretreatment tube 1 is blocked, it can also be cleared through the detection port 13.

[0035] Multiple detection ports 13 are provided and are evenly distributed along the axial direction of the pretreatment tube 1. The number of detection ports 13 is set according to the length of the pretreatment tube 1. The longer the pretreatment tube 1 is, the more detection ports 13 there are.

[0036] The pretreatment device also includes a pre-demediation mechanism 3, which has a sieve plate 31 and a collection trough 32. The collection trough 32 is located below the sieve plate 31. The sieve plate 31 is located on the lower side of the pretreatment pipe 1 and is smoothly connected to the pretreatment pipe 1. In this embodiment, the bottom end of the collection trough 32 is provided with a discharge port 321. Media with a size smaller than the sieve hole size is discharged through the discharge port 321, while media with a size larger than the sieve hole size enters the subsequent process. This can relieve the pressure of the subsequent process and reduce dust pollution.

[0037] The pretreatment pipe 1 is provided with a chute section 15, a desliming section 16 and a transfer section 17 in sequence from back to front. The desliming section 16 is located in the middle and lower part of the pretreatment pipe 1. The feed inlet 11 is located in the chute section 15, the screen plate 31 is located in the desliming section 16, and the discharge outlet 12 is located in the transfer section 17.

[0038] The pretreatment device is also equipped with a detection mechanism 4, which has a detection plate 41 and a detector 42. The detection plate 41 is hung inside the pretreatment tube 1 in a swaying manner, and the detector 42 is used to monitor the status of the detection plate 41.

[0039] like Figure 4 As shown, in this embodiment, the detection mechanism 4 is further provided with a detection shaft 43 and a bearing seat 44. The detection shaft 43 is rotatably disposed in the bearing seat 44, and the detection plate 41 is linked with the detection shaft 43.

[0040] During operation, the detection plate 41 may be partially or completely submerged in the material flow within the pretreatment tube 1. As the medium flows normally forward within the pretreatment tube 1, the detection plate 41 will continuously swing back and forth. If the medium obstructs the pretreatment tube 1, the detection plate 41 will stop swinging. The detector 42, upon detecting the back-and-forth swinging of the detection plate 41, will generate a signal indicating that the medium is flowing normally forward within the pretreatment tube 1. When the detector 42 detects that the detection plate 41 has stopped swinging, the detection plate 41 will cease sending an alarm signal indicating blockage within the pretreatment tube 1. In this embodiment, the detector 42 employs a photoelectric sensor, which determines whether the detection plate 41 is swinging normally by detecting objects periodically blocking light.

[0041] like Figures 1 to 3As shown, the pretreatment device also includes a cleanup mechanism 5, which has a cleanup hook 51. The cleanup hook 51 is hung inside the pretreatment tube 1 and is used to remove linear impurities. When there are lint, woven bags, or other filamentous impurities, the cleanup hook 51 can remove them and take them out for cleaning from the detection port 13. In this embodiment, the cleanup hook 51 can be installed on the cover plate 2 on the detection port 13. Opening the cover plate 2 will simultaneously bring the cleanup hook 51 out of the detection port 13, making the operation convenient.

[0042] The pretreatment pipe 1 is also provided with an inner lining layer, which is evenly distributed on the inner side of the pretreatment pipe 1. The inner lining layer is made of a wear-resistant material with a low coefficient of friction. Wear-resistant ceramics, wear-resistant polymer boards, wear-resistant alloys, and other materials can be used. The pretreatment pipe 1 forms a wear-resistant and smooth inner side, reducing the resistance of the medium sliding forward along the pretreatment pipe 1.

[0043] 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 screening pretreatment device, comprising a pretreatment pipe, characterized in that, The pretreatment tube slopes downwards gradually from back to front. The pretreatment tube has an inlet at its rear end and an outlet at its front end. The pretreatment tube has a U-shaped cross-section. It also includes a pre-demediation mechanism with a sieve plate and a collection trough located below the sieve plate. The sieve plate is located on the lower side of the pretreatment tube and smoothly connects to it. Furthermore, it includes a detection mechanism with a detection plate and a detector. The detection plate is sway-mounted inside the pretreatment tube, and the detector monitors the status of the detection plate.

2. The coal screening pretreatment device according to claim 1, characterized in that: The pretreatment tube has a detection port on its upper side.

3. The pretreatment device for coal screening according to claim 2, characterized in that: It is also equipped with a cover plate, which covers the detection port.

4. The coal screening pretreatment device according to claim 3, characterized in that: The cover plate is hinged to the edge of the detection port, and the edge of the detection port is provided with a hinge.

5. The coal screening pretreatment apparatus according to any one of claims 2 to 4, characterized in that: The detection ports are provided in multiple locations and are evenly distributed along the axial direction of the pretreatment tube.

6. The coal screening pretreatment apparatus according to any one of claims 1 to 4, characterized in that: The pretreatment pipe is provided with a chute section, a stripping section and a transfer section in sequence from back to front. The stripping section is located in the middle and lower part of the pretreatment pipe. The feed inlet is located in the chute section, the screen plate is located in the stripping section and the discharge outlet is located in the transfer section.

7. The coal screening pretreatment apparatus according to any one of claims 1 to 4, characterized in that: It is also equipped with a cleaning mechanism, which has a cleaning hook that is hung inside the pretreatment tube.

8. The coal screening pretreatment apparatus according to any one of claims 1 to 4, characterized in that: The pretreatment tube is also provided with an inner lining layer, which is evenly distributed on the inner surface of the pretreatment tube; the inner lining layer is made of a wear-resistant material with a low coefficient of friction.

Images