Automatic blanking cleaning device for coal conveying belt conveyor

Abstract

The utility model discloses a coal conveying belt conveyor blanking automatic cleaning device which comprises a material returning belt conveyor arranged below a coal conveying belt conveyor, one side of the material returning belt conveyor penetrates into a blanking pipe of the coal conveying belt conveyor, and blanking materials obtained after a coal conveying belt rotates are conveyed into the blanking pipe to be mixed with coal conveyed by the coal conveying belt. The automatic falling coal can be collected and conveyed through the material returning belt conveyor, the working procedure existing due to the fact that manual sweeping is needed at present is avoided, meanwhile, pollution of dust to the production environment in the sweeping process can be reduced, natural potential safety hazards of the dust are eradicated, labor force is liberated, and the production cost is reduced. The coal materials which are tightly adhered on the coal conveying belt can be scraped in a mechanical mode through the scraping plate, and the problem that the normal coal conveying flow is affected due to the fact that the adhesion thickness of the coal materials which are tightly adhered on the coal conveying belt is gradually increased is solved.

Description

Technical Field

[0001] This application relates to the field of coal transportation technology, and in particular to an automatic cleaning device for unloaded material from a coal conveyor belt. Background Technology

[0002] Currently, coal-fired power generating units transport fuel via belt conveyors. As the main equipment for bulk material transportation, a large amount of coal dust adheres to the working face of the belt conveyor during the coal transportation process. Traditional polyurethane sweepers cannot clean it thoroughly. Large amounts of coal dust fall to the ground during high-speed friction between the belt and the rollers, polluting the production environment. The accumulation of coal dust requires cleaning personnel, which not only increases the labor intensity but also poses a potential hazard to the safe operation of the belt conveyor. Furthermore, the dust and debris mixed in with the coal after cleaning are reintroduced into the combustion system, affecting the normal combustion of the coal. Summary of the Invention

[0003] To address the aforementioned problems, this application aims to provide an automatic cleaning device for coal conveyor belts, which can collect and transport the coal that falls on its own, eliminating the need for manual cleaning, reducing dust pollution to the production environment during cleaning, eliminating natural dust safety hazards, freeing up labor, and reducing production costs.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: an automatic cleaning device for unloaded material from a coal conveyor belt, the cleaning device comprising a return conveyor belt disposed below the coal conveyor belt and an automatic scraping device disposed at the unloading end of the coal conveyor belt; one side of the return conveyor belt extends into the unloading pipe of the coal conveyor belt, conveying the unloaded material after the coal conveyor belt rotates to the unloading pipe to mix with the coal conveyed by the coal conveyor belt; the automatic scraping device comprises a support rod disposed on the support frame of the coal conveyor belt, the end of the support rod being provided with a scraper, the top of the scraper abutting against the coal conveyor belt, scraping off the coal adhering to it during the rotation of the coal conveyor belt, and the scraper falling into the unloading pipe along the scraper.

[0005] Preferably, the scraper is elastic, so that its top end is in close contact with the coal conveyor belt.

[0006] Preferably, the scraper is hinged at the end of the support rod, and a torsion spring is provided at the hinge to drive the scraper to press tightly against the surface of the coal conveyor belt.

[0007] Preferably, the scraper has an arc-shaped structure, so that its top end is in close contact with the coal conveyor belt to form an acute angle structure, and its bottom end is close to the inner wall of the material drop pipe.

[0008] The beneficial effects of this application are: the return conveyor belt can collect and transport the coal material that falls by itself, solving the problem of the current need for manual cleaning, while reducing dust pollution to the production environment during the cleaning process, eliminating the safety hazards of dust, freeing up labor, and reducing production costs.

[0009] The scraper can mechanically remove coal that is too tightly adhered to the coal conveyor belt, solving the problem that the thickness of the tightly adhered coal on the conveyor belt gradually increases, affecting the normal coal conveying flow. Attached Figure Description

[0010] Figure 1 This is a diagram showing the bottom discharge of coal during the current coal conveyor belt transportation process.

[0011] Figure 2 The diagram shows a return conveyor belt installed at the bottom of the coal conveyor belt, as per this application.

[0012] Figure 3 This application provides a diagram showing the installation of a scraper on the support frame that abuts against the coal conveyor belt.

[0013] Figure 4 This is a diagram showing the scraper used in this application to remove coal adhering to the coal conveyor belt.

[0014] Figure 5 This diagram illustrates the operational fluctuations of the coal conveyor belt during rotation.

[0015] Figure 6 When the coal conveyor belt jumps upwards, the torsion spring drives the scraper to deflect upwards and resist the coal conveyor belt.

[0016] Figure 7 This diagram illustrates the force exerted by the downward-pressing scraper against the torsional spring when the coal conveyor belt jumps downwards, as described in this application.

[0017] Figure 8 The scraper in this application is designed with an arc-shaped structure to avoid falling coal.

[0018] In the diagram: 1-Coal conveyor belt; 11-Coal conveyor belt; 2-Rotating roller; 3-Support frame; 4-Dust cover; 5-Discharge pipe; 6-Return conveyor belt; 61-Return conveyor belt; 7-Support rod; 8-Scraper. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] See attached document Figures 2-8The diagram illustrates an automatic cleaning device for the unloading material of a coal conveyor belt 1. The device includes a return conveyor belt 6 positioned below the coal conveyor belt 1 and an automatic scraper at the unloading end of the conveyor belt 1. Both the return conveyor belt 6 and the coal conveyor belt 1 include rotating rollers 2 at both ends. A coal conveyor belt 11 is rotatably mounted on the rotating rollers 2 of the coal conveyor belt 1; the return conveyor belt 6 is rotatably mounted on the rotating rollers 2 of the rotating rollers 2 of the rotating rollers 2 of the rotating rollers 2 of the rotating rollers 1 and of the rotating material 6. One side of the return conveyor belt 6 extends into the unloading pipe 5 of the coal conveyor belt 1, conveying the unloaded material from the rotating coal conveyor belt 11 into the unloading pipe 5 to mix with the coal conveyed by the coal conveyor belt 11. A dust cover 4 is installed through the top of the unloading pipe 5, and the end of the coal conveyor belt 1 extends into the dust cover 4, allowing the transported coal to fall into the unloading pipe 5 and be transported to the combustion system. The dust cover 4 is mainly used for dust control during coal unloading. The return conveyor belt 6 is located below the coal conveyor belt 1. It catches coal that adheres to the coal conveyor belt 11 due to moisture or other factors after the belt rotates (the return conveyor belt 61 is preferably larger than the surface width and length of the coal conveyor belt 11 to completely catch the falling coal without it dropping to the ground). It also catches coal that falls due to gravity and vibration during the operation of the coal conveyor belt 1. After catching the coal, it is conveyed by the return conveyor belt 61 to the discharge pipe 5 to mix with the coal transported by the coal conveyor belt 11. This effectively solves the problem of manually cleaning coal that falls to the ground after the coal conveyor belt 11 rotates, and also addresses the difficulty of cleaning due to limited space. Furthermore, by placing the falling coal onto the return conveyor belt 61, it avoids the current problem of falling coal mixing with ground dust and other debris and being transferred back into the fuel system, thus preventing the debris from affecting combustion.

[0021] After the coal conveyor belt 11 rotates, the coal adhering to it falls off by gravity and the working vibration of the conveyor belt 1. However, some coal that cannot fall off due to excessive adhesion continues to be conveyed through the conveyor belt 11, increasing the thickness of the coal layer on the surface of the conveyor belt 11 and affecting the normal coal conveying flow. Therefore, to solve this problem, such as... Figure 3 As shown, the automatic scraping device includes a support rod 7 mounted on a support frame 3 of the coal conveyor belt 1. A scraper 8 is mounted at the end of the support rod 7. The top of the scraper 8 abuts against the coal conveyor belt 11, scraping off the coal adhering to it during the belt's rotation and allowing it to fall along the scraper 8 into the discharge pipe 5. The scraper 8 is elastic (e.g., a rubber plate), ensuring its top remains firmly against the coal conveyor belt. Figure 4As shown, when the coal conveyor belt 11 rotates and drops coal into the discharge pipe 5, the top of the scraper 8 contacts the surface of the coal conveyor belt 11. Under the continuous rotation of the coal conveyor belt 11, the end of the scraper 8 mechanically scrapes off the coal adhering to the coal conveyor belt 11. After scraping, the coal can fall directly into the discharge pipe 5 along the surface of the scraper 8. Therefore, the scraper 8 can mechanically scrape off the coal that cannot fall off by itself on the coal conveyor belt 11, effectively avoiding the problem that the thickness of the adhering coal gradually increases and affects the normal coal transportation flow.

[0022] The return conveyor belt 6 is preferably linked with the coal conveyor belt 1, and the return conveyor belt 6 operates synchronously when the coal conveyor belt 1 is running.

[0023] like Figure 5 As shown, when the coal conveyor belt 11 rotates continuously, it experiences a certain degree of jumping motion after disengaging from the rotating roller 2. When jumping upwards, it disengages from the end of the scraper 8, failing to achieve a scraping effect; while when jumping downwards, it contacts the end of the scraper 8 too tightly, easily damaging the surface of the coal conveyor belt 11. Therefore, to solve this problem, as... Figure 6 As shown, the scraper 8 is hinged to the end of the support rod 7, and a torsion spring (not shown) is provided at the hinge to drive the scraper 8 to press tightly against the surface of the coal conveyor belt 11. The force of the torsion spring is directed to drive the scraper 8 toward the coal conveyor belt 11, thereby pressing the end of the scraper 8 against the surface of the coal conveyor belt 11. When the conveyor belt 11 jumps upward, the torsion spring drives the scraper 8 to rotate and press against the surface of the coal conveyor belt 11; when the coal conveyor belt 11 jumps downward, as... Figure 7 As shown, the scraper 8 is pressed down and overcomes the torsion spring force, so that the end of the scraper 8 can always be in contact with the coal conveyor belt 11 when the coal conveyor belt 11 is disengaged from the rotary roller 2 and jumps, so as to ensure continuous scraping during the coal conveying process.

[0024] Preferred, such as Figure 3-4 As shown, the top of the scraper 8 forms an acute angle (less than 90°) with the coal conveyor belt 11 after they come into contact. This is to prevent the scraper 8 from getting stuck when its end faces the direction of rotation of the coal conveyor belt 11, as the surface of the belt may become rougher due to wear over time. Therefore, the scraper 8 and the coal conveyor belt 11 form an acute angle, ensuring that the end of the scraper 8 is aligned with the direction of rotation of the belt, thus preventing the scraper 8 from affecting the rotation of the belt. Even if the scraper 8 cannot remove tightly adhered coal under this acute angle structure, it will still scrape off the adhering coal when the coal conveyor belt 11 rotates again, ensuring that the adhering coal falls off.

[0025] The coal conveyor belt 11 normally allows the transported coal to fall freely into the discharge pipe 5. When the coal leaves the conveyor belt 11 and falls freely, it has a certain dispersing effect. However, because the scraper 8 forms an acute angle with the conveyor belt 11, the tail end of the scraper 8 extends towards the center of the discharge pipe 5. The dispersed coal will then disperse towards the inner wall of the discharge pipe 5. Therefore, the falling coal will have contact with the scraper 8. The gravity of the falling coal increases, and after contacting the scraper 8, it drives the scraper 8 to... Figure 8 The rotation in the direction indicated by the middle arrow increases the contact force between the top of the scraper 8 and the coal conveyor belt 11, affecting the normal rotation of the coal conveyor belt 11. Simultaneously, the uncertainties in coal dispersion ensure continuous contact between the coal and the scraper 8, resulting in intermittent pressing between the top of the scraper 8 and the coal conveyor belt 11. Therefore, to solve this problem, such as... Figure 8 As shown, the scraper 8 has an arc-shaped structure. When it is in contact with the coal conveyor belt 11, the bottom end of the scraper 8 can approach the inner wall of the material drop pipe 5, thereby keeping it away from the falling and dispersed coal material and solving the problem of the impact of contact on the state of the scraper 8 caused by the falling and dispersed coal material.

[0026] To further clean the coal dust adhering to the coal conveyor belt 11, an electric brush roller (not shown in the figure) can preferably be installed on the other side of the support frame 3 opposite to the scraper 8. During the rolling process, the brush roller can further clean the coal dust adhering to the coal conveyor belt 11.

[0027] The principle of this application is as follows: During the coal conveying process via the coal conveyor belt 1, the return conveyor belt 6 installed below it receives the coal material that adheres to the conveyor belt 11 and falls down on its own, and transports it to the discharge pipe 5 to mix with the transported coal material; at the same time, the scraper 8 mechanically scrapes off the coal material that adheres to the conveyor belt 11 and cannot fall down on its own, thereby avoiding the problem of the coal material adhesion thickness increasing and affecting the coal material transportation volume. After the falling coal material is rotated in time, this cleaning device effectively solves the current need for manual cleaning and the impact of mixing with ground debris during the cleaning process on the combustion of coal material.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope of protection, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. An automatic cleaning device for unloaded material from a coal conveyor belt, characterized in that, The cleaning device includes a return conveyor belt located below the coal conveyor belt and an automatic scraper device located at the material discharge end of the coal conveyor belt. One side of the return conveyor belt extends into the material discharge pipe of the coal conveyor belt, conveying the material discharged after the coal conveyor belt rotates to the material discharge pipe and mixing it with the coal conveyed by the coal conveyor belt. The automatic scraper device includes a support rod located on the support frame of the coal conveyor belt, and a scraper is provided at the end of the support rod. The top of the scraper abuts against the coal conveyor belt, scraping off the coal adhering to it during the rotation of the coal conveyor belt, and the coal falls along the scraper into the material discharge pipe.

2. The cleaning device according to claim 1, characterized in that: The scraper is elastic, so that its top end is in close contact with the coal conveyor belt.

3. The cleaning device according to claim 2, characterized in that: The scraper is hinged to the end of the support rod, and a torsion spring is provided at the hinge to drive the scraper to press tightly against the surface of the coal conveyor belt.

4. The cleaning device according to claim 3, characterized in that: The scraper has an arc-shaped structure, so that its top end is in close contact with the coal conveyor belt to form an acute angle structure, and its bottom end is close to the inner wall of the material drop pipe.

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