Dust suppression system for guide chute of belt conveyor

Abstract

The utility model relates to the technical field of dust suppression devices, in particular to a dust suppression system for a guide chute of a belt conveyor, which comprises a dust cover, and the dust cover is internally divided into a dust fall area A, a dust fall area B and a dust fall area C from back to front; the area A is communicated with the lower end of the elephant trunk, and one side of the elephant trunk is provided with a first-stage circulating pressure relief pipe communicated to the area A; two first dust blocking soft curtains are further arranged in the area A; two second dust blocking soft curtains are arranged in the area B, a second-stage circulation pressure relief pipe is further arranged on the area B, the two ends of the second-stage circulation pressure relief pipe are communicated into the area B, and the end portions of the second-stage circulation pressure relief pipe are located on the rear sides of the second dust blocking soft curtains; two third dust blocking soft curtains are arranged in the area C, a three-stage circulation pressure relief pipe is arranged on the area C, the two ends of the three-stage circulation pressure relief pipe are communicated into the area C, and the end portions of the three-stage circulation pressure relief pipe are located on the rear sides of the third dust blocking soft curtains; according to the system, multiple times of dust falling and dust suppression are carried out near the material falling point of the material guide groove in a multi-partition and multi-stage linkage mode, dust overflowing is effectively suppressed, and compared with dry type or wet type dust falling, the investment cost is low, energy consumption is avoided, inspection is not needed, and maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust suppression device technical field, specifically is a kind of dust suppression system for belt conveyor guide chute. BACKGROUND

[0002] Belt conveyor is a commonly used equipment for transporting material;Guide chute is installed in the material receiving place of belt conveyor, used to receive the material output by the previous process, and transport it to the next process;For powdery material that is easy to generate dust, such as coal, sand, lime, etc., take the coal conveying system as an example, at the material dropping point of each transfer station in the coal conveying system, with the height difference of coal conveying transfer, the falling coal impacts on the belt, causing the belt to vibrate, and the material and dust are easy to overflow from the sides of the chute and the front and back sides;At the same time, due to the poor sealing of the guide chute, the material and dust are also easy to overflow from the sides of the chute and the front and back sides;In addition, during the falling movement of the material, it will cause the gas flow in the chute, making the air pressure at the upper part of the chute less than that at the lower part, and aggravating the overflow of material and dust.

[0003] The overflow of dust into the environment not only causes environmental pollution, but also endangers personal health;Therefore, in order to reduce the dust generated during the material receiving of the guide chute and meet the environmental protection requirements, in the prior art, a dust suppression system is usually installed on the upper side of the guide chute, including a dust cover, and water bath type dust fallers, electrostatic dust fallers, etc. are used to reduce dust in the dust cover;The dust suppression system in the prior art has the following problems: if the number of electronic dust faller installations is small, the dust suppression effect is poor, and a large amount of dust will overflow from the end of the dust cover;If the number of electronic dust faller installations is large, the system cost is high;In addition, professional maintenance personnel are needed to regularly maintain the electronic dust faller during operation, which increases the workload and labor cost. UTILITY MODEL CONTENT

[0004] In view of the shortcomings of the prior art, the utility model aims to provide a dust suppression system for belt conveyor guide chute, which is simple in structure, easy to install, low in equipment investment cost and easy to maintain.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] The dust suppression system for the material guide groove of the belt conveyor, wherein the belt on the material guide groove runs from back to front, and the dust suppression system comprises a dust cover buckled on the upper side of the material guide groove, the dust cover comprises side plates on the left and right sides of the material guide groove, the top of the two side plates is provided with a cover plate, the front end of the cover plate is provided with a dustproof front curtain, and the rear end of the cover plate is provided with a dustproof baffle; the dust cover is divided into three areas from back to front, namely a dust falling area A, a dust falling area B and a dust falling area C; the dust falling area A is communicated with the lower end of the chute, one side of the chute is provided with a first circulating pressure relief pipe, and the lower end of the first circulating pressure relief pipe is communicated into the dust falling area A; two first dust blocking soft curtains are further arranged in the dust falling area A, one of the two first dust blocking soft curtains is located on the rear side of the lower end of the chute, and the other is located on the front side of the lower end of the first circulating pressure relief pipe; two second dust blocking soft curtains are arranged in the dust falling area B at intervals, a second circulating pressure relief pipe is further arranged on the dust falling area B, both ends of the second circulating pressure relief pipe are communicated into the dust falling area B, and both ends are located on the rear side of the two second dust blocking soft curtains; two third dust blocking soft curtains are arranged in the dust falling area C at intervals, a third circulating pressure relief pipe is arranged on the dust falling area C, both ends of the third circulating pressure relief pipe are communicated into the dust falling area C, and both ends are located on the rear side of the two third dust blocking soft curtains.

[0007] Compared with the prior art, the dust suppression system has the following outstanding features:

[0008] The dust falling system is provided with the dust falling area A, the dust falling area B and the dust falling area C, dust falling and dust suppression are carried out near the material falling point of the material guide groove in a multiple-partition and multiple-stage linkage mode, dust overflow is effectively inhibited, environmental protection requirements can be met after use, investment cost is low compared with dry dust falling or wet dust falling, no energy consumption is needed, no inspection is needed, maintenance is convenient, cost is low, and the dust suppression system is suitable for a wide range of applications.

[0009] The dust falling area A is the material receiving area falling point, dust raising is the most serious, the movement of material falling causes gas flow in the chute, pressure difference exists between both ends of the first circulating pressure relief pipe, dust in the dust falling area A is pressed back into the chute through the first circulating pressure relief pipe by siphon effect, and one-time dust falling is realized; the dust falling area B is an intermediate transition area, the second dust blocking soft curtain and the running air flow of the material guide groove cause the dust in the dust falling area B to be sucked from the rear end of the second circulating pressure relief pipe and pressed out from the front end, and the dust is pressed onto the material or the second dust blocking soft curtain, and two-time dust falling is realized; the dust in the dust falling area C is less than that in the rear end, the third dust blocking soft curtain and the running air flow of the material guide groove cause the dust in the dust falling area C to be sucked from the rear end of the third circulating pressure relief pipe and pressed out from the front end, and the dust is pressed onto the material or the third dust blocking soft curtain, and three-time dust falling is realized.

[0010] As a preferred embodiment, the dust suppression system further has the following technical scheme:

[0011] Preferably, the first dust blocking soft curtain located on the front side of the lower end of the first circulating pressure relief pipe is arranged at the front end of the dust falling area A.

[0012] Preferably, the first circulating pressure relief pipe comprises a first dust suction section, a first elbow connecting section and a dust return section, the dust suction section is trumpet-shaped, the lower end has a large diameter and the upper end has a small diameter, the lower end is connected to the cover plate of the dust fall A area; the elbow connecting section connects the dust suction section and the dust return section, the other end of the dust return section is connected to the side of the chute pipe, the dust return section is inclined downward from the end close to the elbow connecting section to the end close to the chute pipe; the trumpet-shaped dust suction section facilitates dust suction from the large diameter and increases the dust suction area; the inclined downward dust return section accelerates the flow speed of the dust from the dust return section to the chute pipe, thereby improving the dust return efficiency.

[0013] Preferably, the two second dust blocking soft curtains are located at the middle of the dust fall B area and the front end of the dust fall B area.

[0014] Preferably, the second circulating pressure relief pipe comprises a second dust suction section, a second elbow connecting section and a first dust pressing section, the lower end of the first dust pressing section is connected to the cover plate of the dust fall B area and is arranged corresponding to the second dust blocking soft curtain at the front end of the dust fall B area; the lower end of the second dust suction section is connected to the cover plate of the dust fall B area and is arranged corresponding to the second dust blocking soft curtain at the middle of the dust fall B area; the second elbow connecting section connects the second dust suction section and the first dust pressing section; the second dust suction section is inclined upward from the end connected to the cover plate to the end connected to the second elbow connecting section, and the first dust pressing section is vertically arranged; the second dust suction section is inclined upward rather than vertically upward, which facilitates the upward flow of the dust along the air flow.

[0015] Preferably, the two third dust blocking soft curtains are located at the three-eighth position and the five-eighth position of the dust fall C area; since the dust fall C area is provided with a dust blocking front curtain at the front end and the dust concentration in the dust fall C area is effectively reduced after passing through the dust fall A area and the dust fall B area, the dust fall point of the dust fall C area is arranged at the middle section.

[0016] Preferably, the third circulating pressure relief pipe comprises a vertically arranged third dust suction section, a second dust pressing section and a horizontal connecting section, the lower end of the third dust suction section is connected to the cover plate of the dust fall C area and is arranged corresponding to the third dust blocking soft curtain at the three-eighth position of the dust fall C area; the lower end of the second dust pressing section is connected to the cover plate of the dust fall C area and is arranged corresponding to the third dust blocking soft curtain at the five-eighth position of the dust fall C area; the horizontal connecting section connects the third dust suction section and the second dust pressing section.

[0017] Preferably, the first dust blocking soft curtain, the second dust blocking soft curtain and the third dust blocking soft curtain all have a double-layer structure, comprising a T-shaped connecting plate, the horizontal plate of the T-shaped connecting plate is used for connecting with the cover plate, the vertical plate of the T-shaped connecting plate is provided with two lateral beams on both sides, the two lateral beams and the vertical plate are fixed by bolting, each lateral beam is provided with a louvered curtain on the lower side, and the slits of the two louvered curtains are staggered; since the first dust blocking soft curtain, the second dust blocking soft curtain and the third dust blocking soft curtain all have a double-layer structure, the two layers of louvered curtains beat each other when the material is running on the belt conveyor, and the material adhered to the louvered curtains is knocked off and carried away.

[0018] Preferably, the first dustproof soft curtain, the second dustproof soft curtain and the third dustproof soft curtain are double-layer structures, each comprising a T-shaped connecting plate, one horizontal beam is arranged on each side of the vertical plate of the T-shaped connecting plate, and the two horizontal beams and the vertical plate are fixed by bolting, one louver is arranged on the lower side of each horizontal beam, and the slits of the two louvers are staggered; a long strip mounting hole is arranged on the cover plate, the louver, the horizontal beam and the vertical plate of the T-shaped connecting plate are inserted into the dust cover through the long strip mounting hole, and the horizontal plate of the T-shaped connecting plate is fixed by bolting with the cover plate.

[0019] Preferably, the lower edge of the louver is in a U-shaped structure, and the middle part is a concave part.

[0020] Preferably, the first circulating pressure relief pipe, the second circulating pressure relief pipe and the third circulating pressure relief pipe are provided with an inspection hole, and the inspection hole is provided with an inspection hole cover; the first circulating pressure relief pipe, the second circulating pressure relief pipe and the third circulating pressure relief pipe can be conveniently and regularly maintained and cleaned.

[0021] Preferably, a dust fall D area is arranged on the front side of the dust cover, the dust fall D area comprises a door-shaped frame, the horizontal beam of the door-shaped frame is located on the upper side of the material guide groove, and a plurality of dry mist nozzles are arranged on the door-shaped frame; in combination with a wet dust fall structure (dry mist nozzle), the dust fall quality can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic diagram of the dust suppression system in use in the embodiment of the utility model;

[0023] Figure 2 is another structure schematic diagram of the dust suppression system in use in the embodiment of the utility model;

[0024] Figure 3 is a side view structure schematic diagram of the dust suppression system in use in the embodiment of the utility model;

[0025] Figure 4 is a side view structure schematic diagram of the side plate in the embodiment of the utility model;

[0026] Figure 5 is a structure schematic diagram of the first circulating pressure relief pipe in the embodiment of the utility model;

[0027] Figure 6 is a structure schematic diagram of the second circulating pressure relief pipe in the embodiment of the utility model;

[0028] Figure 7 is a structure schematic diagram of the third circulating pressure relief pipe in the embodiment of the utility model;

[0029] Figure 8 is a side view structure schematic diagram of the first dustproof soft curtain in the embodiment of the utility model;

[0030] Figure 9is a perspective structure schematic view of the first dust blocking soft curtain in the embodiment of the utility model;

[0031] Figure 10 is an installation structure schematic view of the first dust blocking soft curtain in the embodiment of the utility model;

[0032] Figure 11 is a side view structure schematic view of another first dust blocking soft curtain in the embodiment of the utility model;

[0033] Figure 12 is a perspective structure schematic view of another first dust blocking soft curtain in the embodiment of the utility model.

[0034] Mark explanation: 1, parallel upper roller; 2, 10 ° groove type roller; 3, 20 ° groove type roller; 4, 30 ° groove type roller; 5, 35 ° groove type roller; 6, 35 ° buffer roller; 7, support; 8, side plate; 9, cover plate; 10, dust baffle; 11, dustproof front curtain; 12, chute; 13, primary circulating pressure relief pipe; 1301, first dust suction section; 1302, first elbow connecting section; 1303, dust return section; 14, secondary circulating pressure relief pipe; 1401, second dust suction section; 1402, second elbow connecting section; 1403, first dust compression section; 15, tertiary circulating pressure relief pipe; 1501, third dust suction section; 1502, second dust compression section; 1503, horizontal connecting section; 16, door-shaped frame; 17, dry mist nozzle; 18, dust fall A area; 1801, tail dust suppression area; 1802, material falling buffer area; 1803, pressure relief area; 19, dust fall B area; 20, dust fall C area; 21, dust fall D area; 22, first dust blocking soft curtain; 23, second dust blocking soft curtain; 24, third dust blocking soft curtain; 25, manhole cover; 26, flange joint; 27, L-shaped connecting plate; 28, crossbeam; 29, louver; 30, T-shaped connecting plate. DETAILED DESCRIPTION

[0035] The utility model is further described below in combination with specific embodiments, and the purpose is only to better understand the content of the utility model, therefore, the example does not limit the protection scope of the utility model.

[0036] As Figure 1 shown, in the embodiment, after the standard roller group selected by the belt conveyor bearing rubber belt gradually transits from parallel upper roller 1, 10 ° groove type roller 2, 20 ° groove type roller 3, 30 ° groove type roller 4 to 35 ° groove type roller 5, it starts to enter the material guide groove and uses 35 ° buffer roller 6. To solve the dust suppression problem in the material receiving process, as Figures 1 to 3As shown, the embodiment provides a dust suppression system for a belt conveyor guide chute. The belt on the guide chute runs from back to front (from left to right in the illustrated position). The dust suppression system includes a dust cover fastened to the upper side of the guide chute. The dust cover is fixed using a support 7. The dust cover includes side plates 8 on the left and right sides of the guide chute. The side plates 8 are shown in side view in Fig. 8. Figure 4 As shown, the top of the two side plates 8 is provided with a cover plate 9. The front end of the cover plate 9 is provided with a dustproof front curtain 11. The rear end of the cover plate 9 is provided with a dustproof baffle 10. The guide chute in the dust cover has a total of 6 sections, with one area for every 2 sections. From back to front, the areas are divided into three zones: dust reduction zone A 18, dust reduction zone B 19, and dust reduction zone C 20. The dust reduction zone A 18 is in communication with the lower end of the chute pipe 12. One side of the chute pipe 12 is provided with a first-stage circulating pressure relief pipe 13, which is in communication with the dust reduction zone A 18 at the lower end. Two first dust blocking soft curtains 22 are also provided in the dust reduction zone A 18, one on the rear side of the lower end of the chute pipe 12 and the other on the front side of the lower end of the first-stage circulating pressure relief pipe 13. Two second dust blocking soft curtains 23 are provided in the dust reduction zone B 19. The dust reduction zone B 19 is also provided with a second-stage circulating pressure relief pipe 14, which is in communication with the dust reduction zone B 19 at both ends and is divided into two parts located on the rear side of the two second dust blocking soft curtains 23. Two third dust blocking soft curtains 24 are provided in the dust reduction zone C 20. The dust reduction zone C 20 is provided with a third-stage circulating pressure relief pipe 15, which is in communication with the dust reduction zone C 20 at both ends and is divided into two parts located on the rear side of the two third dust blocking soft curtains 24. To prevent dust from overflowing from the lower edge of the dustproof baffle 10 or the lower edge of the side plate 8, a rubber strip or PVC crystal plate is provided on the lower edge of the dustproof baffle 10 and the lower edge of the side plate 8. The lower edge of the rubber strip or PVC crystal plate is in contact with the rubber belt. Since the rubber strip or PVC crystal plate is a flexible material, it can prevent dust from overflowing while ensuring the smooth operation of the rubber belt. The chute is simulated dynamically using EDEM software to prevent materials from colliding or being squeezed in the chute, thereby reducing dust.

[0037] The system is provided with a dust reduction zone A 18, a dust reduction zone B 19, and a dust reduction zone C 20. Multiple partitions and multiple stages are used to suppress dust multiple times near the material falling point of the guide chute, effectively preventing dust from overflowing. After use, it can meet environmental protection requirements. Compared with dry or wet dust suppression, the investment cost is low, there is no energy consumption, no need for inspection, easy maintenance, low cost, and wide application range.

[0038] As shown in Fig. 8, Figure 3 , Figure 5As shown, the first dust-blocking soft curtain 22 located at the front side of the lower end of the primary circulation pressure relief pipe 13 is set at the front end of the dust settling zone A 18; the primary circulation pressure relief pipe 13 includes a first dust suction section 1301, a first elbow connecting section 1302 and a dust return section 1303. The dust suction section is trumpet-shaped, with a large diameter at the lower end and a small diameter at the upper end, and the lower end is connected to the cover plate 9 of the dust settling zone A 18; the elbow connecting section connects the dust suction section and the dust return section 1303, and the other end of the dust return section 1303 is connected to the side of the chute 12. The dust return section 1303 is inclined downward from the end near the elbow connecting section to the end near the chute 12. In dust suppression zone A 18, the area between the dust baffle 10 and the first dust-blocking soft curtain 22 located behind the lower end of the chute 12 is the tail dust suppression zone 1801, the area between the first dust-blocking soft curtain 22 located behind the lower end of the chute 12 and the area behind the lower end of the primary circulation pressure relief pipe 13 is the material drop buffer zone 1802, and the area between the lower end of the primary circulation pressure relief pipe 13 and another first dust-blocking soft curtain 22 is the pressure relief zone 1803.

[0039] Dust suppression zone A 18, as the material receiving area and the material drop point, is the most severely affected by dust. The material falls through the chute 12 to the material drop buffer zone 1802. The dust flowing backward is blocked by the side plates 8 and the dust baffles 10 on both sides, and either settles or flows forward. At the same time, the movement of the material during the drop causes the gas flow in the chute 12, creating a pressure difference between the two ends of the primary circulation pressure relief pipe 13, which in turn generates a siphon effect. The dust flowing forward is affected by the siphon effect and the action of the first dust-blocking soft curtain 22 located at the lower front of the primary circulation pressure relief pipe 13. It returns upward along the first dust suction section 1301 of the primary circulation pressure relief pipe 13, and returns to the chute 12 through the first elbow connection section 1302 and the dust return section 1303, pressing it into the material. This not only prevents dust from overflowing, but also realizes the recovery of raw materials.

[0040] like Figure 3 , Figure 6 As shown, the two second dust-blocking soft curtains 23 are located at the midpoint of dust-falling zone B 19 and at the front end of dust-falling zone B 19, respectively; the secondary circulation pressure relief pipe 14 includes a second dust suction section 1401, a second elbow connecting section 1402, and a first dust suppression section 1403. The lower end of the first dust suppression section 1403 is connected to the cover plate 9 of dust-falling zone B 19, corresponding to the second dust-blocking soft curtain 23 at the front end of dust-falling zone B 19; the lower end of the second dust suction section 1401 is connected to the cover plate 9 of dust-falling zone B 19. On the cover plate 9, a second dust-blocking soft curtain 23 is set at the halfway point of the dust-falling B zone 19; the second elbow connecting section 1402 connects the second dust-suction section 1401 and the first dust-pressing section 1403; the second dust-suction section 1401 is inclined upward from one end connected to the cover plate 9 to the other end connected to the second elbow connecting section 1402, and the first dust-pressing section 1403 is set vertically; the second dust-suction section 1401 is inclined upward rather than vertically upward, which makes it easier for dust to rise with the airflow.

[0041] Dust suppression zone B 19 is an intermediate transition zone. Due to the airflow disturbance during material transport by the conveyor belt in the feed chute, the dust flows forward. When it reaches the second dust-blocking soft curtain 23 located at the rear, some of it adheres to the second dust-blocking soft curtain 23, while some flows back up through the second dust suction section 1401 of the secondary circulation pressure relief pipe 14. It then flows into the first dust suppression section 1403 through the second elbow connecting section 1402. After being pressed out by the first dust suppression section 1403, it is pressed onto the second dust-blocking soft curtain 23 at the front or onto the material, thus achieving secondary dust suppression.

[0042] like Figure 3 , Figure 7 As shown, the two third-level dust-blocking soft curtains 24 are located at three-eighths and five-eighths of the dust-falling zone C 20, respectively. Because a dust-proof front curtain 11 is installed at the front end, and the dust concentration in the dust-falling zone C 20 has been effectively reduced by dust-falling zones A 18 and B 19, the dust-falling point in the dust-falling zone C 20 is located in the middle section. The three-stage circulating pressure relief pipe 15 includes a vertically arranged third dust-suction section 1501 and a second dust-suppressing section 1502. The lower end of the third dust suction section 1501 is connected to the cover plate 9 of the dust settling zone C 20, and the third dust-blocking soft curtain 24 is set at three-eighths of the dust settling zone C 20; the lower end of the second dust pressing section 1502 is connected to the cover plate 9 of the dust settling zone C 20, and the third dust-blocking soft curtain 24 is set at five-eighths of the dust settling zone C 20; the horizontal connecting section 1503 connects the third dust suction section 1501 and the second dust pressing section 1502.

[0043] Dust suppression zone C 20 has less dust at the rear end. It works on the same principle as dust suppression zone B 19. Due to the airflow disturbance when the material is transported by the conveyor belt, the dust flows forward. When it reaches the third dust-blocking soft curtain 24 located at the rear, some of it adheres to the third dust-blocking soft curtain 24, and some returns up through the third dust suction section 1501 of the three-stage circulation pressure relief pipe 15. It then flows into the second dust-pressing section 1502 through the horizontal connecting section 1503. After being pressed out by the second dust-pressing section 1502, it is pressed onto the third dust-blocking soft curtain 24 at the front or onto the material, thus achieving three-stage dust suppression.

[0044] The first dust-blocking soft curtain 22, the second dust-blocking soft curtain 23, and the third dust-blocking soft curtain 24 are all double-layer venetian blinds 29. When the material is running on the conveyor belt, the two layers of venetian blinds 29 beat against each other, causing the material adhering to the venetian blinds 29 to be knocked off and carried away. This application provides two types of dust-blocking soft curtain structures. The first type: 8. Figure 9 As shown, it includes an L-shaped connecting plate 27. The horizontal plate of the L-shaped connecting plate 27 is used to connect with the cover plate 9. A horizontal beam 28 is provided on each side of the vertical plate of the L-shaped connecting plate 27. The two horizontal beams 28 and the vertical plate are bolted together. A venetian blind 29 is provided under each horizontal beam 28, and the seams of the two venetian blinds 29 are staggered. Second type: as shown... Figure 11As shown, the T-shaped connecting plate 30 is provided with two horizontal beams 28 on both sides of the vertical plate, and the two horizontal beams 28 and the vertical plate are fixed by bolts, and each horizontal beam 28 is provided with a louver 29 on the lower side, and the slits of the two louvers 29 are staggered; the cover plate 9 is provided with a long installation hole, the louver 29, the horizontal beam 28 and the vertical plate of the T-shaped connecting plate 30 are inserted into the dust cover through the long installation hole, and the horizontal plate of the T-shaped connecting plate 30 abuts against the cover plate 9 and is fixed by bolts.

[0045] As shown in the drawings, Figure 12 As shown, the lower edge of the louver 29 is in a U-shaped structure, and the middle part is a concave part, which can avoid the material transported on the belt in the material guide groove and prevent unnecessary dust raising.

[0046] As shown in the drawings, Figures 5 to 7 As shown, the first circulating pressure relief pipe 13, the second circulating pressure relief pipe 14 and the third circulating pressure relief pipe 15 are provided with an inspection hole, and the inspection hole is provided with an inspection hole cover 25; the first circulating pressure relief pipe 13, the second circulating pressure relief pipe 14 and the third circulating pressure relief pipe 15 are connected to the cover plate 9 or the side wall of the chute 12 by a flange joint 26, so that the pipes can be easily connected; the inspection hole and the inspection hole cover 25 of the first circulating pressure relief pipe 13 are arranged in the dust return section 1303, the inspection hole and the inspection hole cover 25 of the second circulating pressure relief pipe 14 are arranged in the second dust collection section 1401, and the inspection hole and the inspection hole cover 25 of the third circulating pressure relief pipe 15 are arranged in the horizontal connection section 1503, so that the pipes can be easily inspected and cleaned.

[0047] As shown in the drawings, Figures 1 to 3 As shown, the front side of the dust cover is provided with a dust falling area D 21, and the dust falling area D 21 comprises a door-shaped frame 16, the horizontal beam of the door-shaped frame 16 is located on the upper side of the material guide groove, and a plurality of dry mist nozzles 17 are arranged on the door-shaped frame 16; the dry mist nozzles 17 are used in combination with the wet dust falling structure, so that the dust falling quality can be further improved.

[0048] The above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application, and any equivalent changes made according to the content of the present application and the drawings are included in the scope of the present application.

Claims

1. A dust suppression system for a belt conveyor chute, wherein the belt on the chute runs from back to front, and the dust suppression system includes a dust cover fastened to the upper side of the chute, characterized in that: The dust cover includes side plates located on the left and right sides of the feed chute, with a cover plate on the top of each side plate, a dustproof curtain at the front end of the cover plate, and a dustproof baffle at the rear end of the cover plate. The dust cover is divided into three zones from back to front: Dust Reduction Zone A, Dust Reduction Zone B, and Dust Reduction Zone C. Dust suppression zone A is connected to the lower end of the chute. A primary circulation pressure relief pipe is installed on one side of the chute, and the lower end of the primary circulation pressure relief pipe is connected to the dust suppression zone A. Two first dust-blocking soft curtains are also installed in the dust suppression zone A, one of which is located behind the lower end of the chute and the other is located in front of the lower end of the primary circulation pressure relief pipe. Two second dust-blocking soft curtains are installed at intervals in the dust suppression zone B. A secondary circulation pressure relief pipe is also installed in the dust suppression zone B. Both ends of the secondary circulation pressure relief pipe are connected to the dust suppression zone B, and the two ends are located behind the two second dust-blocking soft curtains. Two third dust-blocking soft curtains are installed at intervals in the dust suppression zone C. The dust suppression zone C is equipped with a three-stage circulation pressure relief pipe. Both ends of the three-stage circulation pressure relief pipe are connected to the dust suppression zone C, and the two ends are located behind the two third dust-blocking soft curtains.

2. The dust suppression system for the belt conveyor guide chute according to claim 1, characterized in that: The first dust-blocking soft curtain, located at the lower end of the primary circulation pressure relief pipe, is installed at the front end of the dust reduction zone A.

3. The dust suppression system for the belt conveyor guide chute according to claim 2, characterized in that: The primary circulation pressure relief pipe includes a first dust suction section, a first elbow connection section, and a dust return section. The dust suction section is funnel-shaped with a large lower diameter and a small upper diameter, and the lower end is connected to the cover plate of the dust suppression zone A. The elbow connection section connects the dust suction section and the dust return section, and the other end of the dust return section is connected to the side of the chute. The dust return section is inclined downward from the end near the elbow connection section to the end near the chute.

4. The dust suppression system for the belt conveyor feed chute according to claim 1, characterized in that: The two second dust-blocking soft curtains are located at the halfway point of the dust-reducing zone B and at the front end of the dust-reducing zone B.

5. The dust suppression system for the belt conveyor guide chute according to claim 4, characterized in that: The secondary circulation pressure relief pipe includes a second dust suction section, a second elbow connecting section, and a first dust suppression section. The lower end of the first dust suppression section is connected to the cover plate of dust suppression zone B, and is set at the front end of the second dust-blocking soft curtain of dust suppression zone B. The lower end of the second dust suction section is connected to the cover plate of dust suppression zone B, and is set at the second dust-blocking soft curtain at the halfway point of dust suppression zone B. The second elbow connecting section connects the second dust suction section and the first dust suppression section. The second dust suction section is inclined upward from the end connected to the cover plate to the end connected to the second elbow connecting section, and the first dust suppression section is set vertically.

6. The dust suppression system for the belt conveyor feed chute according to claim 1, characterized in that: The two third dust-blocking soft curtains are located at three-eighths and five-eighths of the dust-falling zone C, respectively.

7. The dust suppression system for the belt conveyor guide chute according to claim 6, characterized in that: The three-stage circulation pressure relief pipe includes a vertically arranged third dust suction section, a second dust suppression section, and a horizontal connecting section. The lower end of the third dust suction section is connected to the cover plate of the dust suppression zone C, and is set at the third dust-blocking soft curtain at three-eighths of the dust suppression zone C. The lower end of the second dust suppression section is connected to the cover plate of the dust suppression zone C, and is set at the third dust-blocking soft curtain at five-eighths of the dust suppression zone C. The horizontal connecting section connects the third dust suction section and the second dust suppression section.

8. The dust suppression system for the belt conveyor guide chute according to claim 1, characterized in that: The first, second, and third dust-blocking soft curtains are all double-layered structures, including T-shaped connecting plates. Each side of the vertical plate of the T-shaped connecting plate has a horizontal beam, and the two horizontal beams and the vertical plate are bolted together. Each horizontal beam has a venetian blind on its underside, and the venetian blinds have staggered seams. The cover plate has long mounting holes, through which the venetian blinds, horizontal beams, and the vertical plate of the T-shaped connecting plate are inserted into the dust cover. The horizontal plate of the T-shaped connecting plate is bolted together with the cover plate.

9. The dust suppression system for the belt conveyor guide chute according to claim 8, characterized in that: The bottom edge of the Venetian blind has a U-shaped structure with a concave section in the middle.

10. The dust suppression system for the belt conveyor feed chute according to claim 1, characterized in that: Inspection holes are provided on the primary, secondary, and tertiary circulation pressure relief pipes, and inspection hole covers are installed on the inspection holes.

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