Ladder screen capable of effectively inhibiting dust raising and used for garbage screening treatment

Abstract

The utility model relates to a stepped screen for garbage screening treatment, which can effectively restrain raised dust and comprises an outer frame body of the stepped screen, a plurality of screen meshes distributed in a stepped manner are arranged in the outer frame body, channel steel is sleeved on an upper frame of each screen mesh in an inserting manner, two ends of each channel steel are respectively welded and fixed on the outer frame body, and a flow guide dust collection mechanism is arranged on a lower frame of each screen mesh. The flow guide dust collection mechanism comprises longitudinal profile steel, a longitudinal insertion hole is formed in the profile steel, and a plurality of dust collection flow guide pipes communicated with the insertion hole in the profile steel are fixedly inserted into one side of the profile steel; a longitudinal dust discharge pipe is inserted into the insertion hole of the profile steel, a dust collection groove opposite to the dust collection flow guide pipe is formed in the dust discharge pipe on the inner side of the profile steel, and the two ends of the dust discharge pipe are inserted into the outer frame body respectively. According to the stepped screen, a row of guide pipes are arranged on the lower side edge of the screen cloth, construction waste can flow downwards to the screen cloth on the lower layer along the guide pipes, the problem that waste is left at the joint of the screen cloth can be effectively solved, and the guide pipes can be used as dust collection thin pipes to suck away flying dust generated by vibration.

Description

Technical fields:

[0001] This utility model relates to the technical field of stepped screens, and more specifically to a stepped screen for waste screening and processing that can effectively suppress dust. Background technology:

[0002] With the acceleration of urbanization in my country, the amount of construction waste and other waste generated during urbanization is increasing, and the market size is also growing. The demand for the classification, harmless treatment, reuse, and resource recovery of construction waste is increasing. Screening is a necessary step in the disposal of construction and renovation waste, separating materials of different sizes. This is the prerequisite and foundation for efficient sorting technology. Currently, the equipment used for screening construction and renovation waste is generally a vibrating screen, among which the stepped screen is a commonly used screening structure. The main body of the stepped screen includes a trough-shaped screen frame with multiple screens arranged in steps inside. However, it has been found that a lot of debris tends to accumulate at the joints between adjacent screens. Furthermore, because the waste being screened is crushed construction waste, a significant amount of dust is generated during the screening process. Therefore, the stepped screen needs to be designed with dust suppression and debris reduction mechanisms at the screen joints. Utility model content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a stepped screen for waste screening that can effectively suppress dust. The stepped screen has a row of guide tubes on the lower side of the screen, and construction waste can flow down the guide tubes to the lower screen, which can effectively improve the problem of waste remaining at the screen joints. Moreover, the guide tubes can be used as suction tubes to suck away the dust generated by vibration.

[0004] A stepped screen for waste screening and processing that can effectively suppress dust includes an outer frame of the stepped screen, with a number of screens arranged in a stepped manner inside the outer frame, the screens being inclined; a longitudinal channel steel is inserted into the upper frame of the screen, the two ends of the channel steel are welded and fixed to the inner sidewalls on both sides of the outer frame; a dust guiding and suction mechanism is provided on the lower frame of the screen, the dust guiding and suction mechanism includes a longitudinally oriented steel fixed to the screen, the steel having longitudinal insertion holes formed inside, and a number of horizontal dust suction pipes connected to the insertion holes inside the steel being inserted and fixed on the side of the steel away from the screen;

[0005] A longitudinal dust exhaust pipe is inserted into the insertion hole of the steel profile. A dust suction groove is formed on the dust exhaust pipe on the inner side of the steel profile, which is opposite to the dust suction guide pipe. The two ends of the dust exhaust pipe are respectively inserted into the outer frame. One end of the dust exhaust pipe extends out of the outer frame and is screwed to a sealing cap. The other end extends out of the outer frame and is screwed to a locking nut. The locking nut abuts against the outer side wall of the outer frame.

[0006] Preferably, the screen consists of a rectangular outer frame and a filter screen fixed inside the rectangular outer frame. The thickness of the rectangular outer frame is equal to the width of the channel steel groove. The two side frames of the screen abut against the inner sidewalls of the outer frame.

[0007] Preferably, the side of the steel section away from the screen is an arc surface and formed with several cylindrical annular tube seats, and the dust suction guide pipe is screwed and fixed inside the tube seat;

[0008] The dust extraction guide pipes are linearly and longitudinally evenly distributed on the steel profile.

[0009] Preferably, the shaped steel on the upper screen of the outer frame abuts against the channel steel of the lower screen;

[0010] The channel steel has a support plate that extends obliquely upward, and a strip-shaped rubber pad is fixed to the support plate. The lower frame of the screen abuts against the rubber pad.

[0011] Preferably, the dust collection trough is located on the pipe wall in front of the dust discharge pipe, and the length of the dust collection trough is less than the length of the steel section.

[0012] A positioning groove is formed on the pipe wall at the rear end of one end of the dust exhaust pipe. A positioning strip is inserted into the positioning groove and fixed to the outer side wall of the outer frame. The sealing cap is pressed against the positioning strip.

[0013] Preferably, the sealing cap includes an internally threaded connecting sleeve, a pressure ring is formed on the outer wall of one end of the internally threaded connecting sleeve, the pressure ring presses against the positioning strip, and a regular hexagonal limiting boss is formed on the other end of the internally threaded connecting sleeve.

[0014] Preferably, the diameter of the insertion hole on the steel profile is equal to the diameter of the outer wall of the dust exhaust pipe.

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

[0016] This stepped screen has a row of guide tubes on the lower side of the screen. Construction waste can flow down the guide tubes to the lower screen, which can effectively improve the problem of waste remaining at the screen joints. In addition, the guide tubes can be used as suction tubes to suck away the dust generated by vibration. Attached image description:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0019] Figure 3 This is a top view of the structure of this utility model;

[0020] Figure 4This is a cross-sectional view of the present invention from the front view.

[0021] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Outer frame; 2. Screen; 3. Channel steel; 31. Support plate; 4. Dust collection mechanism; 41. Structural steel; 411. Pipe seat; 42. Dust collection guide pipe; 5. Dust discharge pipe; 51. Dust collection trough; 52. Positioning slot; 6. Sealing cap; 7. Locking nut; 8. Positioning strip; 9. Rubber pad. Detailed implementation method:

[0023] Example: See Figures 1 to 5 As shown, a stepped screen for waste screening and processing that can effectively suppress dust includes an outer frame 1 of the stepped screen, a dust cover is provided on the outer frame 1, and a number of screens 2 arranged in a stepped manner are provided inside the outer frame 1. The screens 2 are inclined. The upper frame of the screens 2 is fitted with longitudinal channel steel 3, and the two ends of the channel steel 3 are welded and fixed to the inner sidewalls on both sides of the outer frame 1. The lower frame of the screens 2 is provided with a dust guiding and suction mechanism 4. The dust guiding and suction mechanism 4 includes a longitudinal steel section 41 fixed to the screens 2. The steel section 41 has longitudinal insertion holes formed inside. A number of horizontal dust suction guide pipes 42 that are connected to the insertion holes inside the steel section 41 are inserted and fixed on the side of the steel section 41 away from the screens 2.

[0024] A longitudinal dust exhaust pipe 5 is inserted into the insertion hole of the steel profile 41. A dust suction groove 51 is formed on the dust exhaust pipe 5 on the inner side of the steel profile 41, which is opposite to the dust suction guide pipe 42. The two ends of the dust exhaust pipe 5 are respectively inserted into the outer frame 1. One end of the dust exhaust pipe 5 extends out of the outer frame 1 and is screwed to a sealing cap 6. The other end extends out of the outer frame 1 and is screwed to a locking nut 7. The locking nut 7 abuts against the outer side wall of the outer frame 1.

[0025] The screen 2 consists of a rectangular outer frame and a filter screen fixed inside the rectangular outer frame. The thickness of the rectangular outer frame of the screen 2 is equal to the width of the groove in the channel steel 3. The two side frames of the screen 2 abut against the inner side walls of the outer frame 1 on both sides.

[0026] The side of the steel profile 41 facing away from the screen 2 is arc-shaped and has several cylindrical ring-shaped tube seats 411. The dust suction guide pipe 42 is screwed and fixed inside the tube seat 411. The tube seat 411 can enhance the connection strength of the dust suction guide pipe 42. Moreover, the dust suction guide pipe 42 is connected by a screw connection, which makes it easy to disassemble and replace when the dust suction guide pipe 42 is bent.

[0027] The dust suction guide pipes 42 are linearly and longitudinally evenly distributed on the steel profile 41, and the spacing between the dust suction guide pipes 42 is consistent.

[0028] The steel 41 on the upper screen 2 inside the outer frame 1 abuts against the channel steel 3 of the lower screen 2, and the channel steel 3 can support the screen 2 and enhance the strength of the stepped screen.

[0029] The channel steel 3 has a support plate 31 extending obliquely upward, and a strip-shaped rubber pad 9 is fixed to the support plate 31. The lower frame of the screen 2 abuts against the rubber pad 9.

[0030] The dust collection trough 51 is located on the pipe wall in front of the dust discharge pipe 5. The length of the dust collection trough 51 is less than the length of the steel section 41, and the entire dust collection trough 51 is located inside the steel section 41.

[0031] A positioning groove 52 is formed on the rear side of one end of the dust exhaust pipe 5. A positioning strip 8 is inserted into the positioning groove 52 and fixed to the outer side wall of the outer frame 1. The sealing cap 6 presses against the positioning strip 8, and its dust suction groove 51 faces forward. Since the dust exhaust pipe 5 is a round pipe, the dust suction groove 51 needs to face forward during installation. The positioning groove 52 and the positioning strip 8 are designed to cooperate to effectively ensure the position of the dust suction groove 51.

[0032] The sealing cap 6 includes an internally threaded connecting sleeve. A pressure ring is formed on the outer wall of one end of the internally threaded connecting sleeve, and the pressure ring presses against the positioning strip 8. A regular hexagonal limiting boss is formed on the other end of the internally threaded connecting sleeve. The sealing cap 6 is used to seal one end of the dust discharge pipe 5.

[0033] The diameter of the insertion hole on the steel section 41 is equal to the diameter of the outer wall of the dust exhaust pipe 5.

[0034] Working principle: This structure is a stepped screen for waste screening and processing that can effectively suppress dust. The main technical feature of the stepped screen is the flow guiding and dust collection mechanism 4. The dust collection guide pipe 42 on the flow guiding and dust collection mechanism 4 can be used as a guide plate with a screening groove. The dust collection guide pipe 42 is set above the connection between the upper and lower screens 2, which can play a guiding role and reduce the amount of waste left at the connection between the screens 2.

[0035] Moreover, the inlet of the suction pipe 42 can be used as a suction port to draw air into the dust discharge pipe 5. Dust can enter from the suction pipe 42, flow to the dust discharge pipe 5, be discharged through the dust discharge pipe 5, and then be intercepted and collected by the subsequent filtration facilities, which can play a role in suppressing dust.

[0036] Furthermore, the screen 2 of the above-mentioned structure is constrained and fixedly connected to the outer frame 1 of the stepped screen by the channel steel 3 and the dust discharge pipe 5, making it easy to disassemble, wash and install the screen 2, thus facilitating the cleaning and replacement of the screen 2.

[0037] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A stepped screen for waste screening and processing that can effectively suppress dust, comprising an outer frame (1) of the stepped screen, wherein a plurality of screens (2) arranged in a stepped manner are provided inside the outer frame (1), and the screens (2) are inclined; characterized in that: The upper frame of the screen (2) is fitted with a longitudinal channel steel (3). The two ends of the channel steel (3) are welded and fixed to the inner sidewalls of the outer frame (1) respectively. The lower frame of the screen (2) is provided with a dust-guiding and suction mechanism (4). The dust-guiding and suction mechanism (4) includes a longitudinal section steel (41) fixed on the screen (2). The section steel (41) has longitudinal insertion holes. Several horizontal dust-guiding pipes (42) that are connected to the insertion holes in the section steel (41) are inserted and fixed on the side of the section steel (41) away from the screen (2). A longitudinal dust discharge pipe (5) is inserted into the insertion hole of the steel profile (41). A dust suction groove (51) is formed on the dust discharge pipe (5) on the inner side of the steel profile (41) and is opposite to the dust suction guide pipe (42). The two ends of the dust discharge pipe (5) are respectively inserted into the outer frame (1). One end of the dust discharge pipe (5) extends out of the outer frame (1) and is screwed with a sealing cap (6). The other end extends out of the outer frame (1) and is screwed with a locking nut (7). The locking nut (7) abuts against the outer side wall of the outer frame (1).

2. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 1, characterized in that: The screen (2) consists of a rectangular outer frame and a filter screen fixed inside the rectangular outer frame. The thickness of the rectangular outer frame on the screen (2) is equal to the width of the groove in the channel steel (3). The two side frames of the screen (2) abut against the inner sidewalls on both sides of the outer frame (1).

3. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 1, characterized in that: The side of the steel section (41) away from the screen (2) is arc-shaped and has several cylindrical ring-shaped tube seats (411). The dust suction guide pipe (42) is screwed and fixed inside the tube seat (411). The dust suction guide pipe (42) is linearly and longitudinally evenly distributed on the steel section (41).

4. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 3, characterized in that: The steel section (41) on the upper screen (2) inside the outer frame (1) abuts against the channel steel (3) on the lower screen (2); The channel steel (3) has a support plate (31) extending obliquely upward, and a strip-shaped rubber pad (9) is fixed on the support plate (31). The lower frame of the screen (2) abuts against the rubber pad (9).

5. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 1, characterized in that: The dust collection groove (51) is located on the pipe wall in front of the dust discharge pipe (5), and the length of the dust collection groove (51) is less than the length of the steel section (41). A positioning groove (52) is formed on the pipe wall at the rear end of one end of the dust exhaust pipe (5). A positioning strip (8) is inserted into the positioning groove (52) and the positioning strip (8) is fixed to the outer side wall of the outer frame (1). The sealing cap (6) is pressed against the positioning strip (8).

6. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 5, characterized in that: The sealing cap (6) includes an internal threaded connecting sleeve. A pressure ring is formed on the outer wall of one end of the internal threaded connecting sleeve. The pressure ring presses against the positioning strip (8). A regular hexagonal limiting boss is formed on the other end of the internal threaded connecting sleeve.

7. A stepped screen for waste screening and processing that can effectively suppress dust, as described in claim 1, characterized in that: The diameter of the insertion hole on the steel section (41) is equal to the diameter of the outer wall of the dust exhaust pipe (5).

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