Wind blowing device for slotted screen

Abstract

The utility model discloses a slot screen wind power blowing device which comprises a vertical blowing air nozzle with an upward air outlet end, a transverse flat air outlet is formed in the upper end of the blowing air nozzle, a plurality of built-in partition plates are distributed in the air outlet in the length direction and divide the air outlet into a plurality of air outlet roadways, an elastic nozzle sleeve is connected to the air outlet end, and the elastic nozzle sleeve is connected to the air outlet end of the blowing air nozzle. The air outlet end is located in the sleeving range of the elastic nozzle sleeve, an air outlet bin is arranged in the sleeving range, a normally-closed nozzle seam is formed in the upper end of the elastic nozzle sleeve, and when air pressure in the air outlet bin reaches a certain degree, the attached position of the nozzle seam expands; the built-in partition plate can effectively prevent dust, so that the purging air nozzle has high dust prevention capacity, and the purging air nozzle is effectively prevented from being blocked; due to the rebound resilience of the elastic nozzle sleeve, air in the blowing air nozzle flows out at a stable flow speed, so that the air flow sprayed by the blowing air nozzle is very stable, and blockages on the slotted screen can be continuously and effectively cleaned.

Description

Technical Field

[0001] The utility model belongs to the field of clean coal production, and more specifically belongs to a slit screen wind blowing device Background Art

[0002] Coal preparation plants are prone to clogging the slotted screens with coal particles when the raw coal entering the washing plant is high in slime content or contains a high proportion of fine particles. If the blockage is not promptly cleared, it will mix with the clean coal and enter the clean coal belt, contaminating the clean coal product and affecting production efficiency. Existing pneumatic blowing devices for slotted screens suffer from problems such as easily blocked nozzles, unstable airflow, and incomplete cleaning. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a slit screen wind blowing device with a simple structure, strong self-dustproof ability, and the ability to effectively prevent the blowing air nozzle from being blocked. The ejected air flow is very stable and can continuously and effectively clean the blockages on the slit screen.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a slit screen wind blowing device, comprising a vertical blowing air nozzle with the air outlet facing upward, the upper end of the blowing air nozzle comprising a transversely flat air outlet, a plurality of built-in partitions are arranged in an array along the length direction of the air outlet, the plurality of built-in partitions divide the air outlet into a plurality of air outlet lanes, a circle of elastic mouth sleeve is fixedly connected to the air outlet end, the air outlet ends of the plurality of air outlet lanes are all within the sleeve range of the elastic mouth sleeve, the sleeve range of the elastic mouth sleeve is the air outlet bin, the upper end of the elastic mouth sleeve has a normally closed mouth slit, and when the air pressure inside the air outlet bin reaches a certain level, the fitting part of the mouth slit expands.

[0005] Furthermore, the lower part of the purge air nozzle is a cylindrical air guide pipe, and the upper end is a flat air collecting pipe.

[0006] Furthermore, the interior of the purge air nozzle is an air pressure chamber, and the air pressure chamber and the air outlet bin are connected through a plurality of air outlet passages.

[0007] Furthermore, the lower end of the purge air nozzle is fixedly connected to a mounting seat and also includes a horizontal air nozzle mounting tube. The air inlets at the lower ends of several of the purge air nozzles are vertically connected through the mounting seat and fixedly connected to the air nozzle mounting tube.

[0008] Furthermore, the gas nozzle mounting tube and the gas delivery device are installed below the slotted screen, and a plurality of screen slots are distributed in an array on the slotted screen. The displacement device can move the gas nozzle mounting tube and the gas delivery device in a direction perpendicular to the length of each screen slot.

[0009] Furthermore, the elastic mouthpiece is made of elastic rubber.

[0010] Beneficial effects: The utility model is a slit screen wind blowing device with a simple structure, and the built-in partition can effectively prevent dust, so that it has a strong dust-proof ability and can effectively prevent the blowing air nozzle from being blocked; the elastic mouth sleeve's own resilience can enable the gas in the blowing air nozzle to flow out at a stable flow rate, so that the ejected air flow is very stable, and can continuously and effectively clean the blockages on the slit screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the purge air nozzle in the utility model;

[0012] Figure 2 This is a structural diagram of the purge air nozzle of the present invention without an elastic nozzle sleeve;

[0013] Figure 3 This is a full cross-sectional view of the main view of the purge air nozzle in the present utility model;

[0014] Figure 4 This is a full cross-sectional view of the left side of the purge air nozzle after ventilation in the present invention;

[0015] Figure 5 This is a schematic diagram of the structure of a slit screen wind blowing device after installation of the utility model;

[0016] Figure 6 Schematic diagram of the top view of the slot screen. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] As attached Figures 1 to 6 As shown, a slit screen wind blowing device comprises a vertical blowing air nozzle 1 with an air outlet end 3 facing upwards, the upper end of the blowing air nozzle 1 comprises a transverse flat air outlet, a plurality of built-in partitions 4 are arranged in an array along the length direction of the air outlet, and the plurality of built-in partitions 4 divide the air outlet into a plurality of air outlet lanes 10, the lower part of the blowing air nozzle 1 is a cylindrical air guide pipe 7, and the upper end is a flat air collecting pipe 8, which can increase the gas in the blowing air nozzle 1 while keeping the gas flow rate in the blowing air nozzle 1 unchanged. Flow rate; the interior of the purge air nozzle 1 is an air pressure chamber 9, and the air pressure chamber 9 and the air outlet bin 13 are connected through a number of air outlet channels 10; a circle of elastic mouth sleeve 5 is fixedly connected to the air outlet end 3, and the elastic mouth sleeve 5 is elastic rubber; the air outlet ends 3 of the several air outlet channels 10 are all within the sleeve range of the elastic mouth sleeve 5, and the sleeve range of the elastic mouth sleeve 5 is the air outlet bin 13. The upper end of the elastic mouth sleeve 5 has a normally closed mouth slit 14. When the air pressure inside the air outlet bin 13 reaches a certain level, the fitting part of the mouth slit 14 expands.

[0019] The lower end of each purge air nozzle 1 is fixedly connected to a mounting base 11, and a plurality of mounting holes 12 are distributed in a circular array on the mounting base 11; it also includes a horizontal air nozzle mounting tube 15, and a plurality of purge air nozzles 1 are equidistantly distributed along the length direction of the air nozzle mounting tube 15 through the mounting base 11, and are connected to the air nozzle mounting tube 15, and the air outlet end 3 of each purge air nozzle 1 faces upward; the air inlet end of the air nozzle mounting tube 15 is connected to the air delivery device 16, and the air nozzle mounting tube 15 and the air delivery device 16 are both fixedly mounted on the displacement device.

[0020] The lower end of the air guide pipe 7 at the lower part of the purge air nozzle 1 is the air inlet 6. When the gas discharged from the exhaust port of the gas transmission device 16 is transmitted to the lower end of each purge air nozzle 1 through the air nozzle installation pipe 15, the gas enters the air pressure chamber 9 of the purge air nozzle 1 from the air inlet 6 at the lower end of the purge air nozzle 1. At this time, the gas will flow along the inner wall of the cylindrical air guide pipe 7 and the inner wall of the flat gas collecting pipe 8 toward each gas outlet channel 10; due to the gathering of the gas collecting pipe 8, the gas reaches each gas outlet channel 10. When the air flow rate reaches the maximum, it gathers at the air outlet bin 13 within the range of the elastic mouthpiece 5, so that the air pressure in the air outlet bin 13 gradually increases. When a certain pressure difference is generated between the air pressure in the air outlet bin 13 and the external air pressure, when the air pressure in the air outlet bin 13 can make the elastic mouthpiece 5 fixed on the upper end of the purge air nozzle 1 overcome its own resilience, the fitting parts of the mouth slit 14 expand and separate from each other, and the air flow in the air pressure chamber 9 flows out of the air pressure chamber 9 at a stable flow rate.

[0021] The air nozzle mounting tube 15 and the air delivery device 16 are installed below the slit screen 18. There are a number of screen slits 19 distributed in an array on the slit screen 18. The air outlet channels 10 in the air outlet at the upper end of the purge air nozzle 1 are relatively narrow. When the purge air nozzle 1 purges the slit screen 18, the mouth slit 14 of the elastic mouth sleeve 5 on the purge air nozzle 1 expands under the action of the air pressure in the air outlet bin 13, and blockage particles of different sizes will fall from the various blockage slits 19. Since the air outlet channels 10 are relatively narrow, the large blockage particles falling from the various blockage slits 19 cannot enter the air outlet channels 10, and therefore cannot block the air outlet channels 10. The small blockage particles, when falling above the air outlet channels 10, will be blown up by the high-speed airflow in the air outlet channels 10, and therefore cannot enter the air outlet channels 10.

[0022] When the air nozzle mounting tube 15 and the air delivery device 16 are fixedly installed on the displacement device, the air outlet ends 3 of each purge air nozzle 1 connected to the air nozzle mounting tube 15 at equal distances along the length direction of the air nozzle mounting tube 15 are all arranged upward, and the air outlet ends 3 of each purge air nozzle 1 are on the same straight line, and the straight line is parallel to the sieve slits 19 on the slit screen 18. The high-speed air flow blown out from the air outlet at the upper end of each purge air nozzle 1 is perpendicular to the slit screen 18 along the long line, and can simultaneously purge the blockage stuck in the same sieve slit 19. The displacement device can move the air nozzle mounting tube 15 and the air delivery device 16 in a direction perpendicular to the length of each sieve slit 19, and pass under each sieve slit 19 in turn, so that the high-speed air flow blown out from the air outlet at the upper end of each purge air nozzle 1 can purge the blockage in each sieve slit 19, thereby completing the purge of the slit screen 18.

[0023] When there is no need to purge the slit screen 18, a circle of elastic mouth sleeves 5 fixedly connected to the air outlet end 3 of each purge air nozzle 1 are gathered and fitted together, and the upper end mouth slit 14 of the elastic mouth sleeve 5 enters a normally closed state. At this time, no matter what blocking particles fall into the sieve slits 19 on the slit screen 18 above each purge air nozzle 1, they cannot enter the purge air nozzles 1 and cannot cause blockage of the purge air nozzles 1.

[0024] The above is the preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A slit screen wind blowing device, characterized by: The invention comprises a vertical purge air nozzle (1) with an air outlet end (3) facing upward, wherein the upper end of the purge air nozzle (1) comprises a transverse flat air outlet, wherein a plurality of built-in partitions (4) are arranged in an array along the length direction of the air outlet, wherein the plurality of built-in partitions (4) divide the air outlet into a plurality of air outlet lanes (10), wherein a circle of elastic mouth sleeves (5) is fixedly connected to the air outlet end (3), wherein the air outlet ends (3) of the plurality of air outlet lanes (10) are all within the sleeve range of the elastic mouth sleeve (5), wherein the sleeve range of the elastic mouth sleeve (5) is an air outlet bin (13), wherein the upper end of the elastic mouth sleeve (5) has a normally closed mouth slit (14), and when the air pressure inside the air outlet bin (13) reaches a certain level, the fitting part of the mouth slit (14) expands.

2. A slit screen wind blowing device according to claim 1, characterized in that: The lower part of the purge air nozzle (1) is a cylindrical air guide pipe (7), and the upper end is a flat air collecting pipe (8).

3. The wind-blowing device for a slotted screen according to claim 1, characterized in that: The interior of the purge air nozzle (1) is an air pressure chamber (9), and the air pressure chamber (9) and the air outlet bin (13) are connected via a plurality of air outlet passages (10).

4. The wind-blowing device for a slotted screen according to claim 1, characterized in that: The lower end of the purge air nozzle (1) is fixedly connected to a mounting seat (11), and also includes a horizontal air nozzle mounting tube (15). The air inlets (6) at the lower ends of the plurality of purge air nozzles (1) are vertically connected through the mounting seat (11) and fixedly connected to the air nozzle mounting tube (15).

5. The wind-blowing device for a slotted screen according to claim 4, characterized in that: The gas nozzle mounting tube (15) and the gas delivery device (16) are mounted below the slotted screen (18). A plurality of screen slots (19) are arranged in an array on the slotted screen (18). The displacement device can move the gas nozzle mounting tube (15) and the gas delivery device (16) in a direction perpendicular to the length of each screen slot (19).

6. The wind-blowing device for a slotted screen according to claim 1, characterized in that: The elastic mouthpiece (5) is made of elastic rubber.

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