Anti-blocking unloading device suitable for dual-fuel separated coal bunker

Abstract

The invention relates to the technical field of coal bunker unloading equipment, in particular to an anti-blocking unloading device suitable for a dual-fuel separated coal bunker, which comprises a mounting frame and a rotating shaft, a jacking assembly is arranged on the rotating shaft, a scraping assembly and a vibration assembly are arranged on the jacking assembly, and the scraping assembly and the vibration assembly are arranged in a linkage manner through the jacking assembly and the vibration assembly. Automatic switching of different discharging working conditions is achieved, a complex control structure does not need to be additionally arranged, operation is easy and convenient, and reliability is high. The scraping assembly synchronously rotates and ascends and descends along with the jacking assembly and is matched with locking and unlocking actions of the vibration assembly, so that the scraping assembly has the functions of rotating, jacking and vibrating at the same time, stacked materials can be efficiently loosened through the multi-action synergistic effect, and compared with a single cleaning structure, the time for solving unloading retardation is greatly shortened, and the overall unloading efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the technical field of coal bunker unloading equipment, specifically to an anti-blocking unloading device suitable for dual-fuel compartmentalized coal bunkers. Background Technology

[0002] Currently, influenced by the national energy strategy of shifting towards clean energy, the share of power generation from coal-fired power plants is continuously decreasing. To reduce costs and increase efficiency, coal-fired power plants generally adopt a dual-fuel, compartmentalized coal bunker feeding mode. This mode stores two types of granular coal with different calorific values ​​and particle sizes in two independent compartments, which are then mixed and supplied to the unit for combustion through a conical discharge port. Although both materials are granular, due to differences in particle size and flow characteristics, they are still prone to adhesion, accumulation, and bridging at the discharge port during the mixing and falling process, seriously affecting discharge efficiency and mixing ratio stability. If a small amount of high-moisture components are mixed into the granular coal, it will further aggravate the material adhesion tendency and worsen the blockage situation.

[0003] Traditional methods often involve installing air hammers or heavy hammers outside the coal bunker to vibrate the outer wall. However, this method has limited effectiveness against bridging blockages caused by granular materials and can easily lead to particle splashing, disordered unloading trajectories, and even localized material compaction and arching, requiring manual unblocking, which is costly and poses safety risks. Existing technologies also have automatic unblocking devices, such as the automatic unblocking device for the coal chute of a circular coal bunker disclosed in Chinese patent application publication number CN114014034A. This device uses a drive component inside the coal chute to drive transmission components, a spiral disc, a scraper, and a stirring rod to achieve automatic stirring and unblocking during coal churn, which can reduce coal dust adhesion and lower labor costs. However, this solution can only achieve the synergy of stirring and scraping and cannot adjust the operating mode according to the blockage conditions. For bridging blockages caused by granular mixed coal, simple stirring and scraping are difficult to loosen the material efficiently and may even disrupt the coal mixture ratio due to forced stirring, thus limiting the unblocking efficiency and effectiveness. Summary of the Invention

[0004] To address the aforementioned issues, a blockage-resistant unloading device suitable for dual-fuel, compartmented coal bunkers is provided. Through the coordinated setup of the lifting and vibrating components, automatic switching between different unloading conditions is achieved, eliminating the need for complex additional control structures. This device is simple to operate and highly reliable. By synchronously rotating and lifting the scraping component with the lifting component, and coordinating with the locking and unlocking actions of the vibrating component, the scraping component simultaneously performs rotation, lifting, and vibration functions. This multi-action synergy efficiently loosens accumulated materials, significantly reducing the time required to resolve unloading blockages compared to a single cleaning structure, and substantially improving overall unloading efficiency.

[0005] To address the problems of existing technologies, this invention provides an anti-clogging unloading device suitable for dual-fuel, compartmented coal bunkers. The device includes a mounting frame installed on a conical unloading port of the coal bunker. The mounting frame has a rotatable rotating shaft, and a lifting assembly that slides along its axis is mounted on the rotating shaft, rotating synchronously with the shaft. The lifting assembly has a scraping assembly for scraping away material adhering to the inner wall of the coal bunker to ensure unobstructed flow at the unloading port. The scraping assembly rotates and moves up and down synchronously with the lifting assembly. The lifting assembly also has a vibrating assembly that drives the scraping assembly to vibrate. The vibrating assembly has a locked state and an unlocked vibration state. A linkage assembly is provided between the lifting assembly and the vibrating assembly. The linkage assembly is configured such that when the lifting assembly slides upward along the rotating shaft, it simultaneously switches the vibrating assembly from the locked state to the unlocked vibration state, causing the scraping assembly to vibrate while rotating and lifting. When the lifting assembly slides downward, it simultaneously switches the vibrating assembly from the unlocked vibration state to the locked state, causing the scraping assembly to rotate only with the rotating shaft to clean the bunker wall.

[0006] Preferably, the lifting assembly includes a lifting rod sleeved on a rotating shaft, the outer peripheral wall of the rotating shaft is provided with a spline, and the inner peripheral wall of the lifting rod is provided with a keyway adapted to the spline.

[0007] Preferably, the lifting rod is provided with a plurality of mounting shells equidistantly surrounding its axis, and the plurality of mounting shells extend radially along the lifting rod. The scraping assembly includes scraper arms that are the same number as the number of mounting shells and correspond one-to-one.

[0008] Preferably, each of the multiple scraper arms has a mounting shaft at one end near the mounting housing. Each mounting shaft is rotatably mounted in its corresponding mounting housing, and the mounting shaft is parallel to the lifting rod. The mounting shaft is a hollow structure, and the vibration assembly includes a counterweight block disposed inside the mounting shaft and offset from the axis of the scraper arm.

[0009] Preferably, the mounting housing is provided with a limiting groove to restrict the rotation angle of the corresponding scraper arm.

[0010] Preferably, the vibration assembly further includes multiple fixing frames that can slide along the extension direction of the mounting shell. The fixing frames are mounted on the lifting rod, and the fixing frames are provided with locking teeth. The mounting shaft is provided with locking grooves that match the locking teeth.

[0011] Preferably, the mounting bracket is fixedly provided with a first hydraulic chamber for driving the lifting rod to slide and a second hydraulic chamber for driving the fixed bracket. The lifting rod is rotatably mounted on the first hydraulic chamber and the second hydraulic chamber. The lifting rod has a hollow structure and a mounting hole communicating with the second hydraulic chamber.

[0012] Preferably, the linkage component is a sensor installed inside the lifting rod. The sensor is used to detect the coal bunker unloading condition to trigger the sliding of the lifting rod.

[0013] Preferably, the top of the lifting rod has a conical structure.

[0014] Preferably, a bevel gear ring is provided inside the mounting bracket and sleeved on the rotating shaft, and a bevel gear is meshed with the side of the bevel gear ring, and the bevel gear is driven by a rotary drive motor.

[0015] The advantages of this invention compared to the prior art are: 1. This invention achieves automatic switching between different unloading conditions through the linkage of the lifting and vibration components, eliminating the need for complex additional control structures and offering simple operation and high reliability. Under normal optimized unloading conditions, the vibration component locks, allowing the scraper component to focus on rotating and cleaning materials adhering to the bin walls, preventing material splashing or disrupting the unloading trajectory due to vibration. This ensures smooth unloading and improves the uniformity of material descent. Under unloading obstruction conditions, the vibration component unlocks, enabling the scraper component to simultaneously perform rotation, lifting, and vibration functions. This multi-action synergy efficiently loosens accumulated materials, significantly reducing the time required to resolve unloading obstructions compared to a single cleaning structure, and substantially improving overall unloading efficiency. Simultaneously, the scraper component rotates and rises synchronously with the lifting component, ensuring that the cleaning and guiding range fully covers the key areas of the conical unloading port, effectively preventing problems such as unloading flow fluctuations and unloading interruptions caused by material adhesion or accumulation.

[0016] 2. This invention achieves the installation of the vibration component through the cooperation of a hollow mounting shaft and an eccentric counterweight. The mounting shaft can accommodate the counterweight, preventing it from being exposed to the impact and erosion of materials in the coal bunker, while also reducing the overall weight of the mounting shaft and lowering power loss during lifting and rotation. The eccentric structure is formed by offsetting the counterweight from the scraper arm axis. When it is necessary to loosen the accumulated material in the bunker, as the mounting shaft rotates synchronously with the scraper arm, the eccentrically positioned counterweight generates centrifugal force. This centrifugal force, through the fixed connection between the mounting shaft and the scraper arm, drives the scraper arm to vibrate, ensuring that the vibration effect is efficiently transmitted to the scraper arm. At this time, while the scraper arm rotates synchronously and rises and falls with the lifting rod, the vibration improves the material loosening efficiency.

[0017] 3. This invention achieves independent driving and coordinated operation of the lifting rod's raising and lowering and the fixed frame's sliding through the division of labor between the first and second hydraulic chambers, improving the reliability of the device's operating condition switching: the first hydraulic chamber focuses on driving the lifting rod's sliding, ensuring the stability of the scraper arm's lifting trajectory; the second hydraulic chamber specifically provides driving power for the fixed frame, ensuring controllable locking and unlocking actions. The two chambers do not interfere with each other, avoiding action delays or jamming caused by a single driving structure. The cooperation between the hollow lifting rod and the mounting hole allows the hydraulic oil in the second hydraulic chamber to be directly transmitted to the fixed frame's driving part, eliminating the need for additional complex oil pipelines. This not only shortens the power transmission path and makes the fixed frame's sliding response faster, but also makes the overall structure more compact, adapting to the limited installation space of the coal bunker's conical unloading port. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the coal bunker.

[0019] Figure 2 This is a top view of a dual-fuel, compartmentalized coal bunker anti-blocking unloading device installed in a coal bunker.

[0020] Figure 3 This is a schematic diagram of a three-dimensional structure for installing a dual-fuel, compartmentalized coal bunker anti-blocking unloading device in the coal bunker.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of a dual-fuel, compartmentalized coal bunker anti-blocking unloading device installed in the coal bunker.

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0024] Figure 6 This is a schematic diagram of a three-dimensional cross-sectional structure of a dual-fuel, compartmentalized coal bunker anti-blocking unloading device installed in the coal bunker.

[0025] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0026] Figure 8 This is a three-dimensional structural diagram of the scraping component and the lifting component in a dual-fuel compartmentalized coal bunker anti-blocking unloading device.

[0027] Figure 9 This is a three-dimensional structural diagram of the scraping component and the vibration component in a dual-fuel compartmentalized coal bunker anti-blocking unloading device.

[0028] Figure 10 This is an exploded view of the scraping and vibration components in a dual-fuel, compartmentalized coal bunker anti-blocking unloading device.

[0029] The diagram is labeled as follows: 1. Coal bunker; 11. Unloading port; 12. Mounting frame; 121. First hydraulic chamber; 122. Second hydraulic chamber; 123. Bevel gear ring; 124. Bevel gear; 125. Rotary drive motor; 2. Rotary shaft; 21. Lifting assembly; 211. Lifting rod; 2111. Mounting shell; 2112. Limiting groove; 2113. Mounting hole; 212. Scraping assembly; 2121. Scraper arm; 2122. Mounting shaft; 2123. Slot; 213. Vibration assembly; 2131. Counterweight; 2132. Fixing frame; 2133. Gear; 214. Linkage assembly. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 6 and Figure 8 As shown: A device for preventing blockage and unloading of a dual-fuel, compartmented coal bunker 1 includes a mounting frame 12 installed on a conical unloading port 11 of the coal bunker 1. The mounting frame 12 has a rotatable rotating shaft 2, and a lifting assembly 21 that slides along its axis is mounted on the rotating shaft 2. The lifting assembly 21 rotates synchronously with the rotating shaft 2. The lifting assembly 21 has a scraping assembly 212 for scraping away material adhering to the inner wall of the coal bunker 1 to ensure unobstructed flow at the unloading port 11. The scraping assembly 212 rotates and rises synchronously with the lifting assembly 21. The lifting assembly 21 also has a mechanism for driving the scraping assembly 212. The vibration component 213 has a locked state and an unlocked vibration state. A linkage component 214 is provided between the lifting component 21 and the vibration component 213. The linkage component 214 is configured to simultaneously switch the vibration component 213 from the locked state to the unlocked vibration state when the lifting component 21 slides upward along the rotation axis 2, so that the scraping component 212 vibrates while rotating and lifting. When the lifting component 21 slides downward, the vibration component 213 is simultaneously switched from the unlocked vibration state to the locked state, so that the scraping component 212 only rotates with the rotation axis 2 to clean the bin wall.

[0032] When the anti-blocking unloading device is working, the mounting frame 12 is fixed at the conical unloading port 11 of the coal bunker 1, providing stable support for the entire device. The rotating shaft 2 on the mounting frame 12 can rotate stably, thereby driving the lifting component 21 sleeved on it to rotate synchronously. The lifting component 21 can slide along the axial direction of the rotating shaft 2, and during the sliding process of the lifting component 21, it will synchronously drive the scraping component 212 installed on the lifting component 21 to complete the rotation and lifting action.

[0033] When material accumulates or adheres to the inner wall of coal bunker 1, affecting the smooth flow of material, the lifting component 21 slides downward along the rotating shaft 2. At this time, the linkage component 214 between the lifting component 21 and the vibration component 213 operates synchronously, switching the vibration component 213 to the locked state. After the vibration component 213 is locked, it can prevent the scraping component 212 from shifting due to vibration, ensuring that the scraping component 212 is in close contact with the inner wall of coal bunker 1. Subsequently, the scraping component 212 rotates synchronously with the rotating shaft 2 and the lifting component 21, thereby scraping off the material adhering to the inner wall of coal bunker 1 and clearing obstacles during the unloading process. When material accumulation in coal bunker 1 obstructs unloading, the lifting component 21 slides upward along the rotating shaft 2, and the linkage component 214 switches the vibration component 213 from the locked state to the unlocked vibration state. At this time, the scraping component 212 rotates with the rotating shaft 2 and rises with the lifting component 21, and is driven by the vibration component 213 to generate vibration. Through the synergistic effect of rotational scraping, lifting impact and vibration, the accumulated material pile is efficiently loosened and the unloading state is quickly restored.

[0034] By linking the lifting assembly 21 and the vibration assembly 213, automatic switching between different unloading conditions is achieved without the need for additional complex control structures, making operation simple and highly reliable. Under normal unloading optimization conditions, the vibration assembly 213 locks, allowing the scraper assembly 212 to focus on rotating and cleaning materials adhering to the bin walls, preventing material splashing or disordered unloading trajectories caused by vibration. This ensures smooth unloading channels and improves the uniformity of material descent. Under unloading obstruction conditions, the vibration assembly 213 unlocks, allowing the scraper assembly 212 to simultaneously perform rotation, lifting, and vibration functions. This multi-action synergy efficiently loosens accumulated materials, significantly shortening the time required to resolve unloading obstructions compared to a single cleaning structure, and significantly improving overall unloading efficiency. Simultaneously, the scraper assembly 212 rotates and rises synchronously with the lifting assembly 21, ensuring that the cleaning and guiding range fully covers the key areas of the conical unloading port 11, effectively avoiding problems such as unloading flow fluctuations and unloading interruptions caused by material adhesion or accumulation.

[0035] like Figures 3 to 8 As shown: The lifting assembly 21 includes a lifting rod 211 sleeved on the rotating shaft 2. The outer peripheral wall of the rotating shaft 2 is provided with a spline, and the inner peripheral wall of the lifting rod 211 is provided with a keyway that matches the spline.

[0036] Since the lifting rod 211 is sleeved on the rotating shaft 2, and the spline on the outer peripheral wall of the rotating shaft 2 is precisely matched with the keyway on the inner peripheral wall of the lifting rod 211, when the rotating shaft 2 rotates, it will drive the lifting rod 211 to rotate synchronously through the meshing transmission of the spline and the keyway, thereby causing the scraping assembly 212 fixed on the lifting rod 211 to rotate with the rotating shaft 2. At the same time, the mating structure of the keyway and spline does not affect the sliding of the lifting rod 211 along the axial direction of the rotating shaft 2. This ensures that the rotational power is stably transmitted to the lifting rod 211 and the scraping assembly 212, avoiding relative sliding during the transmission process that would lead to power loss or lag in the rotation of the scraping assembly 212, thus ensuring the synchronicity and reliability of the scraping and rotation actions. It also provides precise guidance for the axial sliding of the lifting rod 211, ensuring that the trajectory of the lifting rod 211 driving the scraping assembly 212 to rise and fall is stable, and preventing deviation that would cause the scraping assembly 212 to fail to adhere to the inner wall of the coal bunker 1. Compared to other transmission and guiding structures, the spline and keyway mating method has a larger contact area and stronger load-bearing capacity. It can adapt to harsh working conditions such as material impact and vibration in coal bunker 1, reduce component wear, extend the service life of the device, and thus stably ensure the continuity of the unloading process of coal bunker 1 and improve the unloading optimization effect.

[0037] like Figure 3 , Figure 4 , Figure 6 , Figures 8 to 10 As shown: The lifting rod 211 is provided with a plurality of mounting shells 2111 that are equidistantly arranged around its axis. The plurality of mounting shells 2111 extend radially along the lifting rod 211. The scraping assembly 212 includes scraper arms 2121 that are the same number as the mounting shells 2111 and correspond one-to-one.

[0038] By setting multiple mounting shells 2111 on the lifting rod 211 and assembling the scraper arms 2121 one-to-one with the mounting shells 2111, the scraper arms 2121 are evenly distributed around the circumference of the lifting rod 211. During rotational scraping, this ensures complete coverage of the coal bunker wall area at the discharge port 11, preventing material residue buildup due to scraping dead zones and guaranteeing unobstructed discharge. Furthermore, the radial extension of the mounting shells 2111 provides precise installation positioning for the scraper arms 2121, ensuring their extension direction matches the conical bunker wall, improving the fit between the scraper arms 2121 and the wall, and enhancing the scraping effect. The equidistant distribution ensures uniform force on each scraper arm 2121, resulting in more stable operation during rotation, reducing component wear or vibration deviation caused by uneven force, extending the device's service life, and further ensuring the continuity and stability of the coal bunker 1 unloading process.

[0039] like Figures 6 to 10As shown: Each of the multiple scraper arms 2121 has a mounting shaft 2122 at one end near the mounting housing 2111. Each mounting shaft 2122 is rotatably mounted in the corresponding mounting housing 2111, and the mounting shaft 2122 is parallel to the lifting rod 211. The mounting shaft 2122 is a hollow structure. The vibration assembly 213 includes a counterweight 2131 disposed in the mounting shaft 2122 and offset from the axis of the scraper arm 2121.

[0040] The vibration assembly 213 is installed through the cooperation of the hollow mounting shaft 2122 and the eccentric counterweight 2131. The mounting shaft 2122 can accommodate the counterweight 2131, preventing the counterweight 2131 from being exposed and impacted and corroded by the materials in the coal bunker 1, and can also reduce the overall weight of the mounting shaft 2122, reducing power loss during lifting and rotation. The eccentric structure is formed by setting the counterweight 2131 off the axis of the scraper arm 2121. When it is necessary to loosen the accumulated materials in the bunker, the mounting shaft 2122 rotates synchronously with the scraper arm 2121, and the eccentrically set counterweight 2131 generates centrifugal force. With the fixed connection between the mounting shaft 2122 and the scraper arm 2121, the scraper arm 2121 is driven to vibrate, ensuring that the vibration effect is efficiently transmitted to the scraper arm 2121. At this time, the scraper arm 2121 rotates synchronously and rises and falls with the lifting rod 211, thereby improving the material loosening efficiency through vibration.

[0041] It should be noted that the vibration is mainly designed to loosen granular coal. The centrifugal force generated by the revolution speed of the scraper arm 2121 can fully destroy the bridging structure of the granular coal. Since the granular coal has no strong adhesion, it can be loosened by slight vibration without the need for a large excitation force. At the same time, the revolution of the scraper arm 2121 around the center of the coal bunker 1 and the rotation vibration around the mounting shaft 2122 form a compound disturbance, which can more efficiently disperse the particle accumulation and avoid particle retention.

[0042] Meanwhile, multiple scraper arms 2121 cooperate with counterweights 2131 through independent mounting shafts 2122, so that the vibration of each scraper arm 2121 does not interfere with each other, ensuring the stability of the device operation; the mounting shafts 2122 can rotate and are set parallel to the lifting rod 211, which not only provides the necessary freedom of movement for vibration, but also ensures that the vibration trajectory of the scraper arms 2121 is adapted to the curvature of the silo wall of the conical discharge port 11, avoiding the scraper arms 2121 from deviating from the preset range and colliding or detaching from the silo wall during vibration.

[0043] like Figures 6 to 10 As shown: The mounting housing 2111 is provided with a limiting groove 2112 to limit the rotation angle of the corresponding scraper arm 2121.

[0044] The setting of the limiting groove 2112 can limit the rotation angle of the scraper arm 2121, and prevent the scraper arm 2121 from deviating from the preset trajectory due to excessive vibration and colliding with the bin body or detaching from the bin wall. When it is necessary to clean the material attached to the bin wall, the vibration component 213 locks the mounting shaft 2122 under the action of the linkage component 214, so that the scraper arm 2121 keeps in a fixed posture that fits against the bin wall. The limiting groove 2112 further assists in positioning, ensuring that the scraper arm 2121 is stable in posture during the rotation and lifting of the lifting rod 211, which facilitates its scraping and cleaning and ensures smooth unloading. The limiting groove 2112 ensures the stable operation of the vibration assembly 213 and the linkage assembly 214. Placing the vibration assembly 213 within the mounting housing 2111 not only prevents dust and materials in the coal bunker 1 from directly eroding the core structure of the assembly, reducing component wear and failure risks, but also shortens the power transmission path. This allows the vibration assembly 213 to lock and unlock the mounting shaft 2122 and respond more quickly to its start and stop, improving motion synchronization. The limiting groove 2112 on the mounting housing 2111 precisely constrains the rotation range of the scraper arm 2121, providing the necessary freedom of movement for the scraper arm 2121's vibration while effectively preventing the scraper arm 2121 from losing posture control during vibration.

[0045] like Figures 5 to 10 As shown: The vibration assembly 213 also includes a plurality of fixed frames 2132 that can slide along the extension direction of the mounting shell 2111. The fixed frames 2132 are mounted on the lifting rod 211. The fixed frames 2132 are provided with locking teeth 2133. The mounting shaft 2122 is provided with a slot 2123 that matches the locking teeth 2133.

[0046] With multiple fixing brackets 2132 corresponding to each mounting shell 2111, when it is necessary to clean the material adhering to the bin wall, the fixing brackets 2132 slide along the extension direction of the mounting shell 2111 toward the mounting shaft 2122, causing the locking teeth 2133 on the fixing brackets 2132 to precisely engage with the locking grooves 2123 on the mounting shaft 2122, thereby locking and fixing the mounting shaft 2122. At this time, the scraper arm 2121 cannot rotate around the mounting shaft 2122, maintaining a stable posture in contact with the bin wall. As the lifting rod 211 rotates... The scraping is completed by rotation and lifting. When it is necessary to loosen the accumulated material in the bin, the fixed frame 2132 slides in the opposite direction along the extension direction of the mounting shell 2111, the locking teeth 2133 separate from the locking groove 2123, and the locking state of the mounting shaft 2122 is released. At this time, the mounting shaft 2122 can rotate freely. During the rotation of the scraper arm 2121, the eccentric counterweight block 2131 inside the mounting shaft 2122 generates centrifugal force to drive the scraper arm 2121 to vibrate. Combined with the rotation and lifting action, the accumulated material is loosened efficiently, ensuring a smooth unloading channel.

[0047] The locking and unlocking of the mounting shaft 2122 is reliably achieved through the setting of the locking teeth 2133 and the locking groove 2123, providing a stable linkage guarantee for switching between different unloading conditions. The setting of the fixed frame 2132 sliding along the extension direction of the mounting shell 2111 ensures that the sliding trajectory matches the layout direction of the mounting shell 2111, providing precise guidance and preventing the locking teeth 2133 and the locking groove 2123 from misaligning due to the sliding deviation of the fixed frame 2132, thus improving the reliability of the linkage action. The meshing cooperation between the locking teeth 2133 and the locking groove 2123 has a large contact area and strong locking force, which can effectively resist the impact of materials during scraping, prevent the mounting shaft 2122 from rotating unexpectedly and causing the scraper arm 2121 to deviate in posture, and ensure stable scraping effect. The cooperation method of the locking teeth 2133 and the locking groove 2123 has low wear and long service life, which can adapt to the harsh working conditions in the coal bunker 1, further ensuring the long-term stable operation of the device and continuously improving the unloading efficiency.

[0048] like Figures 3 to 8 As shown: The mounting bracket 12 is fixedly provided with a first hydraulic chamber 121 for driving the lifting rod 211 to slide and a second hydraulic chamber 122 for driving the fixed bracket 2132. The lifting rod 211 is rotatably mounted on the first hydraulic chamber 121 and the second hydraulic chamber 122. The lifting rod 211 is a hollow structure and is provided with a mounting hole 2113 communicating with the second hydraulic chamber 122.

[0049] The first hydraulic chamber 121 and the second hydraulic chamber 122 on the mounting bracket 12 are kept fixed. The lifting rod 211 is rotatably mounted on the first hydraulic chamber 121 and the second hydraulic chamber 122, which does not affect the synchronous rotation of the lifting rod 211 with the rotating shaft 2, and can obtain stable support through the first hydraulic chamber 121 and the second hydraulic chamber 122. When it is necessary to clean the material adhering to the silo wall, the first hydraulic chamber 121 starts working, driving the lifting rod 211 to slide downward along the axis of the rotating shaft 2, causing the scraper arm 2121 to approach and fit against the silo wall; at the same time, the second hydraulic chamber 122 outputs hydraulic oil, which flows into the hollow lifting rod 211 through the mounting hole 2113 on the lifting rod 211. With the thrust of the hydraulic oil, the fixing bracket 2132 on the lifting rod 211 slides, so that the locking teeth 2133 on the fixing bracket 2132 engage with the locking groove 2123 of the mounting shaft 2122, locking the mounting shaft 2122 to fix the posture of the scraper arm 2121. Then the scraper arm 2121 rotates synchronously with the rotating shaft 2 and the lifting rod 211 to complete the stable scraping of the material on the silo wall. When it is necessary to loosen the accumulated material in the silo, the first hydraulic chamber 121 reverses the driving force of the lifting rod 211 to slide upward, causing the scraper arm 2121 to rise; at the same time, the second hydraulic chamber 122 controls the hydraulic oil to flow back, the fixed frame 2132 resets after losing hydraulic thrust, the locking teeth 2133 separate from the locking groove 2123, and the locking state of the mounting shaft 2122 is released. At this time, the mounting shaft 2122 can rotate synchronously with the scraper arm 2121, and the internal eccentric counterweight 2131 generates centrifugal force to drive the scraper arm 2121 to vibrate. Under the synergistic effect of rotation, lifting and vibration, the scraper arm 2121 efficiently loosens the accumulated material and quickly restores the unloading channel to a smooth state.

[0050] Through the division of labor and cooperation between the first hydraulic chamber 121 and the second hydraulic chamber 122, independent driving and coordinated operation of the lifting rod 211 and the sliding of the fixed frame 2132 are achieved, improving the reliability of the device's operating condition switching: the first hydraulic chamber 121 focuses on driving the lifting rod 211 to slide, ensuring the stability of the lifting trajectory of the scraper arm 2121; the second hydraulic chamber 122 specifically provides driving power for the fixed frame 2132, ensuring that locking and unlocking actions are controllable, and the two do not interfere with each other, avoiding action delays or jamming caused by a single driving structure. The cooperation between the hollow lifting rod 211 and the mounting hole 2113 allows the hydraulic oil in the second hydraulic chamber 122 to be directly transmitted to the driving part of the fixed frame 2132 without the need for additional complex oil pipelines. This not only shortens the power transmission path and makes the sliding response of the fixed frame 2132 faster, but also makes the overall structure more compact, adapting to the limited installation space of the conical discharge port 11 of the coal bunker 1. In addition, the hydraulic drive has the advantages of large thrust and smooth operation, which can adapt to the harsh working conditions of material impact and dust in the coal bunker 1, ensuring sufficient force when the fixed frame 2132 is locked, and the scraper arm 2121 will not deviate due to material impact during scraping, further ensuring the stability and continuity of the device operation and improving the overall unloading optimization effect.

[0051] like Figures 3 to 6 As shown: The linkage component 214 is a sensor installed inside the lifting rod 211. The sensor is used to detect the unloading condition of the coal bunker 1 to trigger the sliding of the lifting rod 211.

[0052] The unloading conditions inside coal bunker 1 are monitored in real time using sensors (not shown in the figure). When the sensor detects material adhering to the inner wall of coal bunker 1, affecting the smoothness of material descent, it immediately sends a signal to trigger the lifting rod 211 to slide downward along the axis of the rotating shaft 2, causing the scraper arm 2121 fixed on the lifting rod 211 to descend synchronously until the scraper arm 2121 is in contact with the bunker wall. At this time, in conjunction with the subsequent locking action of the fixing frame 2132, the scraper arm 2121 rotates synchronously with the rotating shaft 2 and the lifting rod 211, accurately scraping off the material adhering to the bunker wall. When the sensor detects that material accumulation in the bunker is obstructing unloading, it promptly sends a signal to trigger the lifting rod 211 to slide upward along the axis of the rotating shaft 2, causing the scraper arm 2121 to rise synchronously. At the same time, the fixing frame 2132 unlocks. As the scraper arm 2121 rotates with the rotating shaft 2 and rises with the lifting rod 211, it vibrates through the vibration component 213. With the synergistic effect of rotation, lifting, and vibration, the accumulated material is loosened, and the smooth unloading state is quickly restored.

[0053] This structural design integrates the linkage component 214 as a sensor within the lifting rod 211, enabling automated detection of unloading conditions and precise triggering of the lifting rod 211's sliding motion. This eliminates the need for manual judgment and intervention, significantly improving the automation level and response efficiency of the device. The sensor's internal integration with the lifting rod 211 effectively prevents corrosion or damage from harsh environments such as dust and material impact within the coal bunker 1, ensuring detection accuracy and lifespan. Compared to external sensors, it offers superior protection and stability. Furthermore, the integrated design of the sensor and lifting rod 211 does not occupy additional installation space, resulting in a more compact overall structure that fits the limited space of the conical unloading port 11 in the coal bunker 1. The sensor-triggered sliding mechanism of the lifting rod 211 ensures precise synchronization between condition detection and execution, preventing material blockage caused by delays or misjudgments due to manual operation. This further guarantees the continuity and stability of the unloading process and improves the overall unloading optimization effect.

[0054] like Figures 3 to 8 As shown: The top of the lifting rod 211 is a conical structure.

[0055] By designing the top of the lifting rod 211 as a cone shape, the material flow characteristics and operational stability of the device are optimized. The streamlined cone shape reduces material adhesion and accumulation at the top of the lifting rod 211, lowering the risk of secondary blockage caused by material residue. It also reduces the impact force of material on the lifting rod 211, reducing power loss during rotation and lifting, and improving the device's operating efficiency. Compared to planar or other irregular top structures, the cone shape better adapts to the spatial form of the conical discharge port 11, guiding material flow along a preset trajectory and preventing the formation of eddies or stagnant areas around the lifting rod 211, further ensuring the continuity of the unloading process. Furthermore, the cone shape has higher strength, maintaining structural stability under harsh conditions such as material impact and vibration, reducing the risk of top deformation or damage, and extending the service life of the lifting rod 211.

[0056] like Figures 3 to 8 As shown: A bevel gear ring 123 is provided inside the mounting bracket 12 and sleeved on the rotating shaft 2. A bevel gear 124 is meshed with the side of the bevel gear ring 123, and the bevel gear 124 is driven by a rotary drive motor 125.

[0057] Rotational power is transmitted through the meshing of bevel gear 124 and bevel gear ring 123, offering advantages such as smooth transmission and high torque. This allows it to withstand the load impact generated when the scraper arm 2121 scrapes materials inside the coal bunker 1, preventing power transmission interruption or slippage and ensuring stable output of rotational power, thereby improving the scraping, cleaning, and vibration loosening effects. Integrating the transmission components inside the mounting frame 12 effectively prevents dust and materials inside the coal bunker 1 from corroding and wearing core transmission components such as bevel gear 124 and bevel gear ring 123, reducing the risk of component failure and extending the service life of the transmission structure. At the same time, the bevel gear meshing transmission method has a compact structure, adapting to the limited space inside the mounting frame 12, and has high transmission efficiency, reducing losses during power transmission and lowering the energy consumption of the rotary drive motor 125.

[0058] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A device for preventing blockage and unloading of coal in a dual-fuel compartmentalized coal bunker, comprising a mounting frame (12) disposed on a conical unloading port (11) of the coal bunker (1), wherein a rotatable rotating shaft (2) is disposed on the mounting frame (12), characterized in that, A lifting assembly (21) is provided on the rotating shaft (2) and can slide along its axial direction, and the lifting assembly (21) can rotate synchronously with the rotating shaft (2); The lifting assembly (21) is equipped with a scraping assembly (212) for scraping off the material adhering to the inner wall of the coal bunker (1) to make the unloading port (11) unobstructed. The scraping assembly (212) rotates and rises and falls synchronously with the lifting assembly (21). The lifting assembly (21) is also provided with a vibration assembly (213) that can drive the scraping assembly (212) to vibrate. The vibration assembly (213) has a locked state and an unlocked vibration state. A linkage component (214) is provided between the lifting component (21) and the vibration component (213). The linkage component (214) is configured to simultaneously switch the vibration component (213) from the locked state to the unlocked vibration state when the lifting component (21) slides upward along the rotation axis (2), so that the scraping component (212) vibrates while rotating and lifting. When the lifting component (21) slides downward, the vibration component (213) is simultaneously switched from the unlocked vibration state to the locked state, so that the scraping component (212) only rotates with the rotation axis (2) to clean the bin wall.

2. The anti-blocking unloading device for dual-fuel compartmentalized coal bunkers according to claim 1, characterized in that, The lifting assembly (21) includes a lifting rod (211) sleeved on the rotating shaft (2). The outer peripheral wall of the rotating shaft (2) is provided with a spline, and the inner peripheral wall of the lifting rod (211) is provided with a keyway that matches the spline.

3. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to claim 2, characterized in that, The lifting rod (211) is provided with a plurality of mounting shells (2111) that are equidistantly surrounding its axis. The plurality of mounting shells (2111) extend radially along the lifting rod (211). The scraping assembly (212) includes scraper arms (2121) that are the same number as the mounting shells (2111) and correspond one-to-one.

4. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to claim 3, characterized in that, Multiple scraper arms (2121) are provided with a mounting shaft (2122) at one end near the mounting housing (2111). Each mounting shaft (2122) is rotatably mounted in the corresponding mounting housing (2111). The mounting shaft (2122) is parallel to the lifting rod (211). The mounting shaft (2122) is a hollow structure. The vibration assembly (213) includes a counterweight (2131) disposed in the mounting shaft (2122) and offset from the axis of the scraper arm (2121).

5. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to claim 4, characterized in that, The mounting housing (2111) is provided with a limiting groove (2112) to limit the rotation angle of the corresponding scraper arm (2121).

6. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to claim 4, characterized in that, The vibration assembly (213) also includes a plurality of fixed frames (2132) that can slide along the extension direction of the mounting shell (2111). The fixed frames (2132) are mounted on the lifting rod (211), and the fixed frames (2132) are provided with locking teeth (2133). The mounting shaft (2122) is provided with a slot (2123) that matches the locking teeth (2133).

7. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to claim 6, characterized in that, The mounting bracket (12) is fixedly provided with a first hydraulic chamber (121) for driving the lifting rod (211) to slide and a second hydraulic chamber (122) for driving the fixed bracket (2132). The lifting rod (211) is rotatably mounted on the first hydraulic chamber (121) and the second hydraulic chamber (122). The lifting rod (211) is a hollow structure and has a mounting hole (2113) communicating with the second hydraulic chamber (122).

8. A device for preventing blockage in dual-fuel, compartmented coal bunkers according to any one of claims 2-7, characterized in that, The linkage component (214) is a sensor installed inside the lifting rod (211). The sensor is used to detect the unloading condition of the coal bunker (1) to trigger the sliding of the lifting rod (211).

9. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to any one of claims 2-7, characterized in that, The top of the lifting rod (211) is a conical structure.

10. A device for preventing blockage and unloading of dual-fuel, compartmented coal bunkers according to any one of claims 2-7, characterized in that, The mounting bracket (12) is provided with a bevel gear ring (123) sleeved on the rotating shaft (2), and a bevel gear (124) is meshed on the side of the bevel gear ring (123). The bevel gear (124) is connected to a rotary drive motor (125).

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