Self-locking structure for stone coal box unloading

Abstract

This application discloses a self-locking structure for unloading stone and coal boxes, belonging to the field of stone and coal boxes. The self-locking device includes a box frame for mounting on a rotating unloading device for stone and coal boxes, a stone and coal box body disposed within the box frame, and a self-locking mechanism for fixing the stone and coal box body within the box frame. The self-locking mechanism includes rotating shafts rotatably disposed on both sides of the box frame opening, a locking plate fixedly connected to the bottom of the rotating shafts for contact with the stone and coal box body, a crank fixedly connected to the top of the rotating shafts, and a hydraulic cylinder connected to an external control system. The cylinder body of the hydraulic cylinder is hinged to one of the cranks, and the output end of the hydraulic cylinder is hinged to the other crank. By utilizing the design of the self-locking mechanism, through the cooperation of the hydraulic cylinder, handle, rotating shaft, and locking plate, the locking efficiency of the stone and coal box body within the box frame can be improved, reducing manual labor intensity and saving operation time. Simultaneously, it ensures the stability of the connection after locking, preventing the box body from shaking or falling off during unloading.

Description

Technical Field

[0001] This application relates to the field of stone coal box technology, specifically a self-locking structure for unloading stone coal boxes. Background Technology

[0002] Coal dust is a typical industrial waste generated during the pulverization process of coal-fired power plants. It mainly consists of a mixture of insufficiently ground pyrite, gangue, and coarse coal particles. To reduce dust pollution and facilitate centralized collection and treatment, power plants generally use dedicated coal dust collection bins. When the coal dust bins are full, they need to be transported to the unloading area, where they are dumped using a rotary unloading device.

[0003] The specific operating procedure includes: workers using a forklift to transport the stone and coal box to the rotary unloading device and install it in the matching frame; to prevent the box from shaking or falling off during the unloading process when it is rotated and tilted by the rotating device, the fixing bolts are tightened manually with a wrench to secure the box to the frame, ensuring the box remains stable during unloading. Next, the drive system of the rotary unloading device is started. First, the moving end of the rotating arm is raised by a hydraulic cylinder, causing the rotating arm to rotate the frame and the internal stone and coal box from a horizontal to a vertical position. Then, the rotating mechanism drives the frame and box to rotate synchronously, so that the opening of the stone and coal box faces downwards, and the internal waste is dumped evenly into the transport vehicle below; after unloading, the device drives the frame and box back to a horizontal position, the fixing structure is released, and the empty box can be transported back to the collection point for recycling.

[0004] However, during manual bolt tightening, coal dust in the surrounding environment easily adheres to the bolt threads and nut surfaces, causing thread contamination and wear. Long-term use can lead to bolt corrosion, jamming, and even failure, severely impacting connection reliability and equipment lifespan. Secondly, relying entirely on manual wrench tightening is not only labor-intensive and inefficient, but also requires specialized tools, increasing operational complexity and time costs. This is particularly problematic in power plant sites with frequent operations and harsh environments, significantly affecting the overall efficiency of the unloading process and personnel safety.

[0005] Therefore, this application provides a self-locking structure for unloading stone coal boxes to solve the above problems. Utility Model Content

[0006] This application provides a self-locking structure for unloading stone coal boxes, aiming to solve the problems mentioned in the background art, which rely on manual tightening of fixing bolts with wrenches. This results in coal dust easily adhering to the bolt threads and nuts, causing pollution and wear. Long-term use leads to bolt corrosion, jamming, or even failure, seriously affecting the reliability of the connection between the stone coal box and the box frame and the service life of the equipment. At the same time, manual tightening is labor-intensive, inefficient, and requires special tools, increasing the complexity and time cost of operation. In power plant sites with frequent operations and harsh environments, it seriously restricts the overall efficiency of the unloading process and threatens the safety of personnel.

[0007] To achieve the above objectives, this application provides the following technical solution: a self-locking structure for unloading a stone and coal box, comprising a box frame for installation on a stone and coal box rotary unloading device, a stone and coal box body disposed within the box frame, and a self-locking mechanism for fixing the stone and coal box body within the box frame; the self-locking mechanism includes a rotating shaft rotatably disposed on both sides of the opening of the box frame, a locking plate fixedly connected to the bottom of the rotating shaft for contacting the stone and coal box body, a crank fixedly connected to the top of the rotating shaft, and a hydraulic cylinder connected to an external control system, wherein the cylinder body of the hydraulic cylinder is hinged to one of the cranks, and the output end of the hydraulic cylinder is hinged to the other crank. After the coal box body is transported into the box frame by a forklift, the external control system activates the hydraulic cylinder. The output end of the hydraulic cylinder extends outward. Since the cylinder body is hinged to one crank and the output end is hinged to the other crank, the extension of the output end will drive the two cranks to rotate in opposite directions. The cranks are fixedly connected to the shaft, and the rotation of the cranks will synchronously drive the shaft to rotate. The locking plate is fixed at the bottom of the shaft. When the shaft rotates, it will drive the locking plate to rotate as well, eventually causing the locking plate to press against the coal box body, thereby locking the relative position of the coal box body in the box frame and completing the automatic locking operation without the need for manual tightening of bolts with a wrench.

[0008] Preferably, to facilitate the installation of the rotating shaft: bearing seats are fitted at both ends of the rotating shaft, and the bearing seats are fixedly connected to the box frame. This reduces the difficulty of rotating shaft installation, ensures the coaxiality and stability of the rotating shaft after installation, reduces frictional resistance during rotation, extends the service life of the rotating shaft, and ensures smooth operation of the self-locking mechanism.

[0009] Preferably, to reduce wear on the coal box body caused by the locking plate: a rubber pad is fixedly connected to the inner end of the locking plate, and the outer surface of the rubber pad is provided with anti-slip texture. This effectively avoids wear on the box body caused by hard contact between the locking plate and the coal box body, while increasing the friction between the locking plate and the box body, improving the anti-slip effect after locking, and further ensuring the stability of the box body within the box frame.

[0010] Preferably, to prevent the locking plate from bending, a reinforcing rib is fixedly connected to the outer end of the locking plate. This enhances the structural strength and bending resistance of the locking plate, preventing deformation and bending due to excessive force during the support of the housing or long-term use, thus ensuring the locking reliability and service life of the self-locking mechanism.

[0011] Preferably, the top of the box frame is provided with a through hole corresponding to the opening of the stone and coal box body, and the through hole is larger than the opening of the stone and coal box body. This ensures that the waste inside the stone and coal box body can be smoothly and completely dumped into the transport vehicle below during unloading, avoiding the accumulation of waste in the box frame due to insufficient through hole size, improving unloading efficiency, and reducing the workload of cleaning up residual waste.

[0012] Preferably, to facilitate the pouring of the coal and gravel box body into the box frame, arc-shaped guide plates are fixedly connected to both sides of the box frame opening. This reduces the difficulty of pouring the coal and gravel box body into the box frame using a forklift, guides the coal and gravel box body into the designated position of the box frame quickly and accurately, reduces collisions between the box body and the edge of the box frame opening, protects the equipment, and improves loading and unloading efficiency.

[0013] This application utilizes a self-locking mechanism to improve the locking efficiency of the coal and stone box body within the box frame, reduce manual labor intensity, save operation time, and ensure the connection stability after locking, preventing the box body from shaking or falling off during unloading.

[0014] This application effectively avoids wear on the box body caused by hard contact between the locking plate and the coal box body through the rubber pad, while enhancing the friction between the locking plate and the box body, improving the anti-slip effect after locking, and further ensuring the stability of the box body within the box frame. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a self-locking structure for unloading stone and coal boxes; Figure 2 This is a schematic diagram of the connection between the box frame and the self-locking mechanism. Figure 3 This is a partial structural diagram of the self-locking mechanism.

[0016] In the picture: 1. Box frame; 2. Stone and coal box body; 3. Self-locking mechanism; 31. Rotating shaft; 311. Bearing seat; 32. Locking plate; 321. Rubber pad; 322. Reinforcing rib; 33. Crank; 34. Hydraulic cylinder; 4. Guide plate. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Example 1 This embodiment provides a self-locking structure for unloading stone and coal boxes, such as... Figure 1-3 As shown, the self-locking device includes a frame 1 for mounting on the rotary unloading device for the coal and stone box, a coal and stone box body 2 disposed within the frame 1, and a self-locking mechanism 3 for fixing the coal and stone box body 2 within the frame 1. The self-locking mechanism 3 includes a rotating shaft 31 rotatably disposed on both sides of the opening of the frame 1, a locking plate 32 fixedly connected to the bottom of the rotating shaft 31 for contacting the coal and stone box body 2, a crank 33 fixedly connected to the top of the rotating shaft 31, and a hydraulic cylinder 34 connected to an external control system. The cylinder body of the hydraulic cylinder 34 is hinged to one of the cranks 33, and the output end of the hydraulic cylinder 34 is hinged to the other crank 33. The design of the self-locking mechanism 3 improves the locking efficiency of the coal and stone box body 2 within the frame 1, reduces manual labor intensity, saves operation time, and ensures the stability of the connection after locking, preventing the box from shaking or falling off during unloading. After the coal box body 2 is transported into the box frame 1 by a forklift, the external control system activates the hydraulic cylinder 34. The output end of the hydraulic cylinder 34 extends outward. Since the cylinder body of the hydraulic cylinder 34 is hinged to one of the cranks 33 and the output end is hinged to the other crank 33, the extension of the output end will drive the two cranks 33 to rotate in opposite directions. The cranks 33 are fixedly connected to the rotating shaft 31. The rotation of the cranks 33 will synchronously drive the rotating shaft 31 to rotate. The locking plate 32 is fixed to the bottom of the rotating shaft 31. When the rotating shaft 31 rotates, it will drive the locking plate 32 to rotate as well, and finally make the locking plate 32 press against the coal box body 2, thereby locking the relative position of the coal box body 2 in the box frame 1, completing the automatic locking operation without the need for manual tightening of bolts with a wrench.

[0019] To facilitate the installation of the rotating shaft 31, bearing seats 311 are fitted at both ends of the rotating shaft 31, and the bearing seats 311 are fixedly connected to the housing frame 1. This reduces the installation difficulty of the rotating shaft 31, ensures the coaxiality and stability of the rotating shaft 31 after installation, reduces the frictional resistance when the rotating shaft 31 rotates, extends the service life of the rotating shaft 31, and ensures the smooth operation of the self-locking mechanism 3. The fixed connection between the bearing seats 311 and the housing frame 1 provides a stable installation support point for the rotating shaft 31. The two ends of the rotating shaft 31 are fitted into the bearing seats 311, and the bearings inside the bearing seats 311 can convert the sliding friction of the rotating shaft 31 into rolling friction. When the rotating shaft 31 rotates with the crank 33, the rolling of the bearings can greatly reduce the frictional resistance between the rotating shaft 31 and the mounting components. At the same time, the fixed structure of the bearing seats 311 can limit the radial and axial movement of the rotating shaft 31, ensuring that the rotating shaft 31 always rotates stably along the fixed axis, which facilitates the quick and accurate installation of the rotating shaft 31 onto the housing frame 1.

[0020] To prevent the locking plate 32 from bending, a reinforcing rib 322 is fixedly connected to the outer end of the locking plate 32. This enhances the structural strength and bending resistance of the locking plate 32, preventing deformation and bending due to excessive force during the support of the box or long-term use, thus ensuring the locking reliability and service life of the self-locking mechanism 3. The reinforcing rib 322 is fixedly connected to the outer end of the locking plate 32, forming a support structure similar to "ribs," which can distribute the pressure borne by the locking plate 32 when supporting the coal box body 2. When the locking plate 32 is subjected to the reaction force of the box body or stress due to its own weight or rotational inertia, the reinforcing rib 322 can transmit the stress to a larger area, reducing local stress concentration on the locking plate 32, thereby effectively resisting the tendency of the locking plate 32 to bend and deform, and maintaining the flatness and structural stability of the locking plate 32.

[0021] The top of the box frame 1 has a through hole corresponding to the opening of the stone and coal box body 2, and the through hole is larger than the opening of the stone and coal box body 2. This ensures that the waste inside the stone and coal box body 2 can be smoothly and completely dumped into the transport vehicle below during unloading, avoiding the accumulation of waste inside the box frame 1 due to insufficient through hole size, improving unloading efficiency, and reducing the workload of cleaning up residual waste. During the unloading process, the rotating unloading device drives the box frame 1 and the stone and coal box body 2 to flip to the opening-facing position. Since the through hole at the top of the box frame 1 corresponds to the opening of the stone and coal box body 2, and the through hole size is larger than the opening size of the stone and coal box body 2, when the waste inside the stone and coal box body 2 is dumped outward under the action of gravity, it will completely pass through the through hole at the top of the box frame 1, and will not be blocked by the edge of the top of the box frame 1, thus falling entirely into the transport vehicle below. This prevents waste from being stuck in the gap between the box frame 1 and the stone and coal box body 2 or on the top of the box frame 1, ensuring that there is no residue during the unloading process.

[0022] To facilitate the pouring of the coal and stone box body 2 into the box frame 1, curved guide plates 4 are fixedly connected to both sides of the opening of the box frame 1. This reduces the difficulty of pouring the coal and stone box body 2 into the box frame 1 using a forklift, guides the coal and stone box body 2 to enter the designated position in the box frame 1 quickly and accurately, reduces collisions between the box body and the edge of the opening of the box frame 1, protects the equipment, and improves loading and unloading efficiency. The curved guide plates 4 are fixed to both sides of the opening of the box frame 1, and their curved structure has a guiding function. When the forklift moves the coal and stone box body 2 towards the opening of the box frame 1, even if there is a slight deviation in the position of the coal and stone box body 2, it will first come into contact with the inclined surface of the curved guide plate 4. Under the guidance of the curved guide plate 4, the coal and stone box body 2 will automatically adjust its position along the curvature of the guide plate 4, gradually aligning with the installation area inside the box frame 1, and finally smoothly enter the box frame 1. This eliminates the need for operators to repeatedly adjust the forklift position and avoids collision damage caused by hard contact between the box body and the opening of the box frame 1.

[0023] Example 2 Unlike Embodiment 1, to reduce wear on the coal box body 2 caused by the locking plate 32, a rubber pad 321 is fixedly connected to the inner end of the locking plate 32, and the outer surface of the rubber pad 321 is provided with anti-slip texture. This effectively avoids wear on the box body caused by hard contact between the locking plate 32 and the coal box body 2, while enhancing the friction between the locking plate 32 and the box body, improving the anti-slip effect 32 after locking, and further ensuring the stability of the box body within the box frame 1. When the locking plate 32 holds the main body 2 of the coal box, the rubber pad 321 on the inner side of the locking plate directly contacts the surface of the box. The rubber material has good elasticity and softness, which can buffer the impact force generated when the locking plate 32 is tightened, and avoid the hard friction between the metal locking plate 32 and the surface of the box, which would cause wear to the box. At the same time, the anti-slip texture on the outer surface of the rubber pad 321 can increase the contact friction between the rubber pad 321 and the surface of the box. Even if the box is subjected to forces such as flipping or tilting during the unloading process, it can reduce the relative sliding between the box and the locking plate 32, and ensure the stability of the locking state.

[0024] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0025] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A self-locking structure for unloading stone coal boxes, comprising a box frame (1) for installation on a stone coal box rotary unloading device, a stone coal box body (2) disposed within the box frame (1), and a self-locking mechanism (3) for fixing the stone coal box body (2) within the box frame (1). Its features are: The self-locking mechanism (3) includes a rotating shaft (31) rotatably disposed on both sides of the opening of the box frame (1), a locking plate (32) fixedly connected to the bottom of the rotating shaft (31) for contacting the main body (2) of the stone and coal box, a crank (33) fixedly connected to the top of the rotating shaft (31), and a hydraulic cylinder (34) connected to an external control system. The cylinder body of the hydraulic cylinder (34) is hinged to one of the cranks (33), and the output end of the hydraulic cylinder (34) is hinged to the other crank (33).

2. The self-locking structure for unloading stone and coal boxes according to claim 1, characterized in that: Both ends of the rotating shaft (31) are fitted with bearing seats (311), and the bearing seats (311) are fixedly connected to the box frame (1).

3. The self-locking structure for unloading stone and coal boxes according to claim 1, characterized in that: A rubber pad (321) is fixedly connected to the inner end of the locking plate (32), and the outer surface of the rubber pad (321) is provided with anti-slip texture.

4. The self-locking structure for unloading stone and coal boxes according to claim 1, characterized in that: The outer end of the locking plate (32) is fixedly connected with a reinforcing rib (322).

5. The self-locking structure for unloading stone and coal boxes according to claim 1, characterized in that: The top of the box frame (1) is provided with a through hole corresponding to the opening of the stone and coal box body (2), and the through hole is larger than the opening of the stone and coal box body (2).

6. The self-locking structure for unloading stone and coal boxes according to claim 1, characterized in that: Arc-shaped guide plates (4) are fixedly connected to both sides of the opening of the box frame (1).

Images