A dust control device for a coal feeding tooth roller crusher

Abstract

The utility model discloses a dust control device for coal tooth roll crusher, related to coal material conveying technical field, including the carrier for the coal material of the carrier of the discharge port and the negative pressure component for the switching of discharge port, the negative pressure component includes the cover body with the closed end and the open end, and the cover body is provided with negative pressure pipeline intercommunication, the closed end is linked with the discharge port, and the open end is combined in the carrier top, to make the cover body between the carrier and discharge port form a negative pressure environment atmosphere, the device still includes the dust remover with fan and recovery pipeline on it, and one end of negative pressure pipeline and recovery pipeline are connected with dust remover. The utility model discloses a region between the discharge port of the crusher and the carrier constitutes a negative pressure environment atmosphere, utilizes the dust in the negative pressure adsorption of discharge process to dust to the outside diffusion.

Description

Technical Field

[0001] This utility model relates to the field of coal conveying technology, specifically to a dust control device for a coal conveying toothed roller crusher. Background Technology

[0002] A coal conveyor toothed roller crusher is a specialized mechanical device primarily used for processing raw coal containing gangue. It crushes the coal by generating shearing force through the relative rotation of double or four toothed rollers. During operation, it produces a significant amount of dust. Because both the feed and discharge ports of the crusher are open-type, and the toothed rollers are typically located near the lower discharge port, most of the dust generated at the toothed rollers leaks into the air along with the coal blocks from the discharge port.

[0003] A search revealed that patent document CN218945144U discloses a dust-preventing crusher. The crusher includes a machine body, a motor fixedly connected to the left side wall of the machine body, a crushing roller fixedly connected to the output end of the motor, a feed hopper fixedly connected to the upper end of the machine body, and a dust-preventing assembly between the machine body and the feed hopper. The dust-preventing assembly includes a collection box fixedly installed on the outside of the machine body, a water tank fixedly connected to the upper end of the collection box, a water supply pipe connected to the upper end of the water tank, a spray box connected to the other end of the water supply pipe, a spray nozzle connected to the inner wall of the spray box, a dust collection box fixedly connected to the inner wall of the machine body, a dust collection pipe connected to the outer side of the dust collection box with one end connected to the collection box, a collection box movably connected to the inner side of the collection box, and a vacuum cleaner fixedly connected to the inner wall of the collection box.

[0004] In operation, the aforementioned crusher uses a water pump to supply water to its spray box via a water pipe. The water is then discharged through spray nozzles located at the feed inlet to prevent dust from escaping from there. However, this dust prevention method only addresses dust leaking from the feed inlet and does not address dust leaking from the discharge outlet. Even though the crusher uses a dust collection box to absorb dust from the machine body, it is still difficult to prevent a small amount of dust from leaking from the discharge outlet. Utility Model Content

[0005] The purpose of this utility model is to solve the problems in the prior art by proposing a dust control device for a coal conveying toothed roller crusher. This device creates a negative pressure environment between the crusher outlet and the carrier, and uses the negative pressure environment to adsorb dust during the discharge process, thereby inhibiting the outward diffusion of dust.

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] A dust control device for a coal conveying toothed roller crusher includes a carrier for receiving coal discharged from the discharge port and a negative pressure component for transferring the discharge port to the carrier.

[0008] The negative pressure component includes a cover with a closed end and an open end, and a negative pressure pipe is connected to the cover. The closed end is connected to the discharge port, and the open end is attached to the top of the carrier, so that the cover forms a negative pressure environment between the carrier and the discharge port.

[0009] The device also includes a dust collector with a fan and a recovery pipe, with one end of the negative pressure pipe and the recovery pipe connected to the dust collector.

[0010] As a further embodiment of this utility model: the negative pressure pipes are configured as multiple pipes and evenly distributed on the cover.

[0011] As a further embodiment of this utility model: the carrier is a conveyor belt, and the frame of the conveyor belt is used for placing and installing the cover.

[0012] As a further embodiment of this invention, a vibration pump is installed outside the recycling pipeline.

[0013] As a further embodiment of this utility model, a flap valve is provided on the recycling pipeline.

[0014] As a further embodiment of this utility model: the recycling pipe is provided with a cleaning hole, and the inner wall of the recycling pipe is provided with a baffle that can cover the cleaning hole.

[0015] As a further embodiment of this utility model: the baffle is arranged axially inside the recycling pipe, and the top of the baffle is movably connected to the inner wall of the recycling pipe.

[0016] As a further embodiment of this invention, a sealing ring is provided on the side of the baffle facing the cleaning hole.

[0017] As a further embodiment of this utility model, the baffle is generally circular and adapted to the inner diameter of the recycling pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By installing a hood with both closed and open ends between the discharge port and the carrier, and connecting it to a negative pressure pipeline, a stable negative pressure environment is created at the coal transfer point. This negative pressure effectively draws dust into the system, preventing dust from spreading outwards at its source. Simultaneously, the design of the recovery pipeline forms a closed-loop system, drawing the dust blown back into the hood for secondary treatment, thus improving dust removal efficiency.

[0020] 2. By introducing a dust collector equipped with a fan and providing a centralized treatment destination for the negative pressure and recovery pipelines, the system gains a stable and powerful power source. The suction generated by the fan ensures a strong and stable negative pressure environment within the enclosure, while the dust collector efficiently separates and collects dust, allowing clean air to be discharged. This not only improves the system's processing capacity and reliability but also achieves centralized dust collection and treatment, avoiding secondary pollution.

[0021] 3. By setting up multiple negative pressure pipes and evenly distributing them across the hood, the negative pressure suction ports cover a larger area, enabling simultaneous suction of multiple dust generation points or diffusion paths. This multi-point arrangement effectively avoids dust collection dead zones that may be caused by single-point suction, ensuring a more uniform and stable distribution of the negative pressure airflow field inside the hood. This allows for comprehensive dust capture across all areas within the hood, enhancing the overall efficiency and reliability of the dust collection system.

[0022] 4. Installing a vibration pump outside the recycling pipeline can effectively shake off dust adhering to the inner wall of the pipeline through periodic or continuous mechanical vibration, significantly reducing maintenance requirements and ensuring the continuity and reliability of the dust removal process.

[0023] 5. Installing a flap valve on the recovery pipeline has the primary advantage of is that it can isolate the dust collector from the enclosure without shutting down the system, facilitating maintenance of the dust collector or downstream equipment. Secondly, it can prevent backflow of air or reverse dust dispersion when the fan stops, acting as a check valve and helping to maintain the cleanliness and stability of the negative pressure environment inside the system.

[0024] 6. By providing a cleaning port and inner wall baffle, a direct and convenient cleaning entry point is provided for operators. When it is necessary to clean the dust accumulated in the recycling pipeline, there is no need to disassemble the entire pipeline. Simply open the baffle to clean efficiently through the cleaning port, which greatly reduces the difficulty, time cost, and labor cost of daily maintenance work and ensures long-term unobstructed pipeline flow.

[0025] 7. The baffle is arranged along the axial direction of the pipe and its top end is movably connected. This design allows the baffle to be easily opened or closed like a door. The rotation of the baffle facilitates the entry of the nozzle, and the state of the baffle after rotation can block the recycling pipe, so that the recycling pipe is isolated into two areas, upper and lower. When the nozzle works, it only acts on the lower area, and the upper area is isolated.

[0026] 8. The baffle is designed to be circular, matching the inner diameter of the pipe. This design allows for a perfect fit with the circular recovery pipe when closed, minimizing airflow turbulence and pressure loss. This shape design results in minimal resistance and optimal sealing, ensuring both efficient dust removal airflow and excellent airtightness. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a front view structural diagram of the present invention;

[0029] Figure 2 This is a schematic cross-sectional view of the recycling pipeline of this utility model. Figure 1 ;

[0030] Figure 3 This is a schematic cross-sectional view of the recycling pipeline of this utility model. Figure 2 .

[0031] In the diagram: 1. Cover; 2. Negative pressure pipeline; 3. Recycling pipeline; 4. Dust collector; 5. Fan; 6. Vibration pump; 7. Flip valve; 8. Cleaning hole; 9. Baffle; a. Discharge port; b. Carrier; c. Crusher. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1 As shown, a dust control device for a coal conveying toothed roller crusher includes a negative pressure component. The negative pressure component includes a cover 1, which has an open end and a closed end. The closed end is used to connect to the discharge port a of the crusher c, and the open end is used to face the carrier b that receives the coal. Therefore, when the coal is discharged from the discharge port a of the crusher c, the coal falls onto the carrier b, and the cover 1 will cover and restrict the dust during the crushing process, preventing the dust from escaping.

[0034] Furthermore, the negative pressure assembly also includes a negative pressure pipe 2, which is connected to the hood 1. The air intake of the negative pressure pipe 2 is shaped like a trumpet, and a filter screen is installed inside the trumpet-shaped air intake. The negative pressure pipe 2 is used to generate negative pressure, so that a negative pressure environment is created inside the hood 1. Therefore, the hood 1 can absorb dust and transport it along the negative pressure pipe 2, avoiding the situation where dust escapes during the process of coal falling from the discharge port a to the carrier b, effectively ensuring the cleanliness of the production environment in the plant area.

[0035] To enable the operation of the negative pressure pipeline 2, this application also includes a dust collector 4, which is equipped with a fan 5. One end of the negative pressure pipeline 2 is connected to the dust collector 4. During operation, the fan 5 generates negative pressure, creating a negative pressure environment inside the housing 1 through the negative pressure pipeline 2. The adsorbed dust is collected and stored in the filter bags inside the dust collector 4. During maintenance or shutdown, the filter bags can be backflushed using the dust collector 4's built-in backflushing system to periodically clean the dust, maintain the filter bag filtration efficiency, and extend the equipment's service life.

[0036] Preferably, in this application, the dust collector 4 is configured as a bag filter dust collector, and the filter bag is made of flame-retardant, oil-resistant and anti-static fiber felt. The filter bag is periodically blown by a solenoid valve to recycle the collected coal dust.

[0037] To collect the dust blown down, this application includes a recovery pipe 3 connected to a dust collector 4, and a flap valve 7 is installed inside the recovery pipe 3. After a large amount of dust is generated in the recovery pipe 3 through repeated backflushing, the flap valve 7 can be opened to allow the dust in the recovery pipe 3 to fall into the collection tank.

[0038] To avoid the need for additional collection tanks or other collection equipment, this application preferably connects one end of the recycling pipe 3 to the cover 1. Therefore, when the flap valve 7 is opened later, the dust will fall directly onto the carrier b. Since the dust is accumulated over a long period of time, it is often in clumps or blocks and will not generate dust during the process of falling onto the carrier b.

[0039] It should be noted that the dust collector 4 in this application is a conventional technical means in the prior art, and will not be described in detail here in order to avoid cumbersome writing.

[0040] If the length of the cover 1 is relatively long, multiple sets of negative pressure pipes 2 can be set up. Multiple sets of negative pressure pipes 2 are arranged along the length of the cover 1. Multiple sets of negative pressure pipes 2 are used to generate multiple evenly distributed negative pressure adsorption points inside the cover 1, thereby improving the negative pressure adsorption effect on dust.

[0041] Furthermore, to avoid the need for relocation of the coal on carrier b after several crushing operations, this application sets carrier b as a conveyor belt, which can directly transfer the crushed coal. The choice of a conveyor belt as carrier b serves two purposes: firstly, it allows for continuous coal transfer; secondly, the transfer of coal maintains a consistently maximized negative pressure environment inside the hood 1, providing sufficient space for dust diffusion within the hood 1 and further reducing the risk of dust escape. Additionally, the hood 1 can be directly mounted on the conveyor belt frame without the need for additional brackets or other supports.

[0042] Due to the characteristics of dust, this application selects dust explosion-proof models for electrical equipment such as the motor on the fan 5 and the solenoid valve on the dust collector 4.

[0043] Before operating crusher C, the blower 5 and dust collector 4 must be started first, and the flap valve 7 must be checked simultaneously to ensure it is opening and closing normally. When crusher C is started, coal enters the inner cavity of crusher C through the feed inlet a for crushing. Coal blocks of the correct particle size after crushing enter the conveyor belt through the discharge outlet. The coal dust generated during this process is confined within the hood 1 and sucked into the filter bags of the dust collector 4 through the negative pressure pipe 2. The dust collector 4 periodically performs reverse blowing on the filter bags, blowing the attached coal dust back into the recovery pipe 3. When the coal dust in the recovery pipe 3 reaches a certain weight, the flap valve 7 opens manually or automatically, and the coal dust falls onto the conveyor belt, where it is transported to the next stage.

[0044] like Figures 2-3 As shown, in order to prevent dust from falling too slowly and causing blockage in the recycling pipe 3, this application provides a vibration pump 6 outside the recycling pipe 3. By periodically turning on the vibration pump 6, the dust can be vibrated, so that when the flap valve 7 is opened later, all the dust will fall directly down.

[0045] Furthermore, under abnormal operating conditions such as when the incoming coal is relatively damp, the coal dust may easily stick together. After prolonged operation, the coal dust gradually adheres to the inner wall of the recovery pipe 3, causing poor material flow or blockage. Therefore, this application provides a cleaning hole 8 on the recovery pipe 3. Under normal operating conditions, the cleaning hole 8 is closed; when adhesion occurs on the inner wall of the recovery pipe 3, the cleaning hole 8 is opened, and dry ice cleaning is used. The specific cleaning method is as follows: first, the nozzle is inserted into the recovery pipe 3 through the cleaning hole 8, and then granular dry ice (-78.5℃) is accelerated by compressed air and sprayed from the nozzle onto the inner wall of the recovery pipe 3. This cleaning action has multiple functions:

[0046] (1) The extremely cold dry ice causes the adhesive layer to shrink and become brittle, separating it from the inner wall of the recycling pipe 3.

[0047] (2) Dry ice instantly vaporizes into carbon dioxide gas, and its volume expands rapidly, blowing away the peeled-off adhesive layer.

[0048] To prevent this cleaning method from interfering with the operation of the recovery pipe 3, this application provides a baffle 9 on the inner wall of the recovery pipe 3 that covers the cleaning orifice 8, thereby appropriately isolating the production system in which the dust collector 4 operates. Preferably, the baffle 9 is arranged axially within the recovery pipe 3, and the top of the baffle 9 is movably connected to the inner wall of the recovery pipe 3. A sealing ring is provided on the side of the baffle 9 facing the cleaning orifice 8. Figure 2As shown, when the baffle 9 contacts the cleaning hole 8, the sealing ring seals the cleaning hole 8. When cleaning is required, the baffle 9 can be directly pushed open using the nozzle. The baffle 9 will then rotate clockwise. This rotation facilitates the entry of the nozzle and, in its rotated state, blocks the recovery pipe 3, isolating it into upper and lower areas. When the nozzle operates, it only acts on the lower area, isolating the upper area. This state can be achieved by... Figure 3 To represent it.

[0049] Preferably, the baffle 9 is circular and adapted to the inner diameter of the recycling pipe 3.

[0050] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A dust control device for a coal conveying toothed roller crusher, characterized in that, It includes a carrier (b) for receiving coal discharged from the outlet (a) and a negative pressure assembly for connecting the outlet (a) and the carrier (b); The negative pressure component includes a cover (1) with a closed end and an open end. A negative pressure pipe (2) is connected to the cover (1). The closed end is connected to the discharge port (a), and the open end is attached to the top of the carrier (b) so that the cover (1) forms a negative pressure environment between the carrier (b) and the discharge port (a). The device also includes a dust collector (4) with a fan (5) and a recovery pipe (3), with one end of the negative pressure pipe (2) and the recovery pipe (3) connected to the dust collector (4).

2. The dust control device for a coal conveying toothed roller crusher according to claim 1, characterized in that, The negative pressure pipes (2) are configured as multiple pipes and are evenly distributed on the cover (1).

3. A dust control device for a coal conveying toothed roller crusher according to claim 1 or 2, characterized in that, The carrier (b) is a conveyor belt, and the frame of the conveyor belt is used for placing and installing the cover (1).

4. A dust control device for a coal conveying toothed roller crusher according to claim 1 or 2, characterized in that, A vibration pump (6) is installed outside the recycling pipe (3).

5. A dust control device for a coal conveying toothed roller crusher according to claim 1 or 2, characterized in that, A flap valve (7) is installed on the recycling pipeline (3).

6. A dust control device for a coal conveying toothed roller crusher according to claim 1 or 2, characterized in that, The recycling pipe (3) is provided with a cleaning hole (8), and the inner wall of the recycling pipe (3) is provided with a baffle (9) that can cover the cleaning hole (8).

7. A dust control device for a coal conveying toothed roller crusher according to claim 6, characterized in that, The baffle (9) is arranged axially inside the recycling pipe (3), and the top of the baffle (9) is movably connected to the inner wall of the recycling pipe (3).

8. A dust control device for a coal conveying toothed roller crusher according to claim 6, characterized in that, A sealing ring is provided on the side of the baffle (9) facing the cleaning hole (8).

9. A dust control device for a coal conveying toothed roller crusher according to claim 6, characterized in that, The baffle (9) is circular in shape and is compatible with the inner diameter of the recycling pipe (3).

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