Anti-loosening device for lime kiln bucket elevator

Abstract

The utility model discloses a lime kiln bucket elevator anti-loosening device, bucket elevator includes chain and hopper, the chain includes outer link plate, still includes anti-loosening device, the anti-loosening device includes: the counter sunk bolt hole and countersunk bolt of being opened on the outer link plate, the screw rod part of countersunk bolt passes through the connecting lug plate of outer link plate and hopper in proper order, be located the spring pressure device between the connecting lug plate of hopper and chain outer link plate, including the sleeve of being fixed on the chain outer link plate and a pressure block that can slide in the sleeve, the pressure block is through a pressure spring and is continuously applied to the connecting lug plate of hopper pressure force, the utility model discloses the structure of countersunk bolt and independent spring pressure device combination, countersunk bolt provides main rigid connection, and spring device continuously exerts elastic pressure force, and the pre-tightening force attenuation caused by initiative compensation vibration, fundamentally eliminates loosening, and the compact and reasonable device structure does not need to weld, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator-related equipment, and more specifically, to an anti-loosening device for a lime kiln bucket elevator. Background Technology

[0002] Bucket elevators, as a type of lifting machinery, are widely used in various fields such as mining, metallurgy, and lime kilns. A bucket elevator is primarily a lifting machine that uses buckets to lift powdery or granular bulk materials to a certain height. It consists of buckets, a chain, and a drive unit. The drive unit drives the buckets to move up and down in a cyclical motion via the drive chain, thus lifting the material.

[0003] Currently, the elevators used in my country generally suffer from unstable buckets fixed on the drive chain, which affects the service life of the buckets. Moreover, when the load-bearing capacity is low, they are also difficult to maintain, causing great inconvenience to users. In existing technology, bucket chains consist of inner chain plates, outer chain plates, pins, rollers, etc. The bucket is fixed on the outer chain plate; the gap between the inner and outer chain plates meshes with the teeth of the head / tail wheel of the elevator; the operation of the drive head wheel drives the chain and bucket to form a closed loop from the head wheel to the tail wheel, thereby completing the lifting and transportation of materials. However, the following problems and drawbacks exist in actual use: Hexagonal head bolts are commonly used to fasten the bucket and the outer chain plate. The head of the hexagonal bolt is directly exposed and pressed against the surface of the outer chain plate, relying on friction for fixation. However, the preload of the hexagonal head bolt is weakened by factors such as the amount of material in the bucket and the high-frequency vibration of the elevator, which can easily cause the bolt to fall off, affecting the material lifting. Usually, it is necessary to manually spot weld the nut and bolt together to achieve secondary fixation and prevent loosening. This method is cumbersome, destroys the removability of the bolt, and the weld may crack in the vibration environment, making the anti-loosening effect unreliable. It is also extremely inconvenient for maintenance and replacement. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide an anti-loosening device for a lime kiln bucket elevator. The bucket elevator includes a chain and buckets fixed to the outer chain plate via connectors. The chain consists of an inner chain plate, an outer chain plate, pins, and rollers. The device also includes an anti-loosening device comprising: Countersunk bolt holes and matching countersunk bolts are provided on the outer chain plate. The head of the countersunk bolt is completely accommodated in the countersunk bolt hole, and its threaded part passes through the connecting lug plate of the outer chain plate and the hopper in sequence and is fastened by the anti-loosening nut. A spring clamping device located between the connecting lug plate of the hopper and the outer chain plate includes a sleeve fixed to the outer chain plate and a clamping block that can slide inside the sleeve. The clamping block continuously applies a clamping force to the connecting lug plate of the hopper through a clamping spring.

[0005] As a preferred embodiment, an anti-loosening washer is pressed between the head of the countersunk bolt and the bottom surface of the countersunk bolt hole, and the anti-loosening washer is fitted onto the threaded rod of the countersunk bolt.

[0006] As a preferred embodiment, the anti-loosening washer is a disc spring washer or a serrated locking washer.

[0007] As a preferred embodiment, a locking plate is provided between the anti-loosening nut and the connecting lug plate of the hopper. The locking plate has a through hole in the center for the screw of the countersunk bolt to pass through, and a locking lug on its side that can be bent and fit tightly against the side plane of the anti-loosening nut.

[0008] As a preferred embodiment, the opening of the countersunk bolt hole is also covered with a protective cover, which is fixed to the surface of the outer chain plate by a snap-fit ​​structure on its edge.

[0009] As a preferred embodiment, the surface of the clamping block of the spring clamping device that contacts the connecting lug of the hopper is a rough toothed surface.

[0010] As a preferred embodiment, the countersunk bolt has a slot or cross groove at the center of the top surface of its head.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model combines a countersunk bolt structure with an independent spring clamping device. The countersunk bolt provides the main rigid connection, while the spring device continuously applies elastic clamping force to actively compensate for the preload attenuation caused by vibration, thus fundamentally preventing loosening. The device has a compact and reasonable structure, requires no welding, and is easy to maintain. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partially enlarged structural diagram of point A in this utility model; Figure 3 This is a schematic diagram of the internal structure of the spring clamping device of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to specific embodiments.

[0014] A loosening prevention device for a bucket elevator in a lime kiln, the bucket elevator including a chain 1 and buckets 2 fixed to the outer chain plate by connectors, the chain 1 consisting of an inner chain plate, an outer chain plate, pins and rollers, and further including an anti-loosening device, the anti-loosening device comprising: The countersunk bolt hole 3 and the matching countersunk bolt 4 are opened on the outer chain plate. The head of the countersunk bolt 4 is completely accommodated in the countersunk bolt hole 3, and its screw part passes through the connecting ear plate of the outer chain plate and the hopper 2 in sequence and is fastened by the anti-loosening nut 5. The spring clamping device 9 located between the connecting ear plate of the hopper 2 and the outer chain plate includes a sleeve 91 fixed to the outer chain plate and a clamping block 92 that can slide within the sleeve 91. The clamping block 92 continuously applies clamping force to the connecting ear plate of the hopper 2 through a clamping spring 93.

[0015] In use, the bucket 2 is initially fixed to the outer chain plate using the connector. Then, the countersunk bolts are passed through the countersunk bolt holes 3 on the outer chain plate and the connecting lugs of the bucket, and finally tightened with the anti-loosening nuts 5. At this point, the head of the countersunk bolt 4 is completely inside the countersunk bolt hole 3, ensuring the flatness of the structure. Simultaneously, the spring clamping device 9 begins to function. The sleeve 91 is fixed to the outer chain plate, and the clamping block 92 slides within the sleeve 91. Under the action of the clamping spring 93, a continuous clamping force is applied to the connecting lugs of the bucket 2, further ensuring the tightness of the connection between the bucket and the outer chain plate, effectively preventing loosening during use, and improving the overall stability and reliability of the lime kiln bucket elevator.

[0016] As a preferred embodiment, an anti-loosening washer 6 is also pressed between the head of the countersunk bolt 4 and the bottom surface of the countersunk bolt hole 3, and the anti-loosening washer 6 is sleeved on the thread of the countersunk bolt 4.

[0017] The anti-loosening washer 6 further enhances the reliability of the connection. When the countersunk bolt 4 passes through the countersunk bolt hole 3 on the outer chain plate and the connecting ear plate of the hopper 2 and is tightened with the anti-loosening nut 5, the anti-loosening washer 6 is pressed between the head of the countersunk bolt 4 and the bottom surface of the countersunk bolt hole 3. It can provide additional friction and effectively prevent the countersunk bolt 4 from loosening due to vibration or other reasons during use, thereby ensuring that the connection between the hopper 2 and the outer chain plate always remains tight, further guaranteeing the stable operation of the lime kiln bucket elevator.

[0018] As a preferred embodiment, the anti-loosening washer 6 is a disc spring washer or a serrated locking washer.

[0019] When disc spring washers are used, their unique disc-shaped structure can generate significant elastic deformation under pressure, thus providing stable and durable elastic force to better press the countersunk bolt head against the bottom surface of the countersunk bolt hole, enhancing the anti-loosening effect. Serrated locking washers, on the other hand, with their evenly distributed serrations, greatly increase friction when interacting with the contact surface, effectively preventing the countersunk bolt from loosening. Both types of anti-loosening washers can be selected according to actual working conditions and requirements, providing strong assurance for the reliable connection between the buckets and the outer chain plates of a lime kiln bucket elevator.

[0020] As a preferred embodiment, a locking piece 7 is provided between the anti-loosening nut 5 and the connecting lug plate of the hopper 2. The locking piece 7 has a through hole in the center for the screw of the countersunk bolt 4 to pass through, and a locking lug 71 on its side that can be bent and fits tightly against the side plane of the anti-loosening nut 5.

[0021] The locking plate 7 is typically made of a metal material with good elasticity and toughness to ensure it is not easily deformed or damaged during long-term use. After the countersunk bolt 4 passes through the through hole in the center of the locking plate 7 and is tightened with the anti-loosening nut 5, the locking lug 71 is bent upwards and pressed tightly against the side plane of the anti-loosening nut 5. This creates an additional locking structure between the anti-loosening nut 5 and the connecting lug plate of the hopper 2. This locking structure effectively prevents the anti-loosening nut 5 from rotating due to vibration or other factors during equipment operation, thereby further enhancing the reliability of the countersunk bolt 4 connection and ensuring the stability of the connection between the hopper 2 and the outer chain plate, providing a more reliable guarantee for the safe and stable operation of the lime kiln bucket elevator.

[0022] As a preferred embodiment, the opening of the countersunk bolt hole 3 is also covered with a protective cover 8, which is fixed to the surface of the outer chain plate by a snap-fit ​​structure 81 on its edge.

[0023] The protective cover 8 is typically made of high-strength engineering plastic, a material known for its wear resistance and corrosion resistance, allowing for prolonged use in harsh working environments without significant damage. Covering the opening of the countersunk bolt hole 3, the protective cover 8 effectively prevents dust and debris from entering, avoiding difficulties in rotating or damaging the countersunk bolt 4 due to foreign objects. It also reduces bolt corrosion caused by dust accumulation. Its cleverly designed snap-fit ​​structure 81 on the edge allows for a tight fit with the outer chain plate, facilitating easy installation and removal. When inspecting or replacing the countersunk bolt 4, the protective cover 8 can be easily removed and quickly reinstalled without affecting the normal operation of the equipment, further enhancing the overall stability and reliability of the lime kiln bucket elevator.

[0024] As a preferred embodiment, the surface of the clamping block 92 of the spring clamping device 9 that contacts the connecting lug of the hopper 2 is a rough toothed surface.

[0025] This rough toothed surface design significantly increases the friction between the clamping block 92 and the connecting ear plate of the hopper 2. During actual operation, the lime kiln bucket elevator generates various vibrations and impacts. Without sufficient friction, relative slippage may occur between the clamping block 92 and the connecting ear plate, affecting the clamping effect of the spring clamping device 9 on the hopper 2. The rough toothed surface design effectively prevents this, ensuring that the clamping block 92 remains in close contact with the connecting ear plate, allowing the spring clamping device 9 to stably perform its clamping function. This guarantees the stability of the hopper 2 during operation, reduces material spillage caused by hopper swaying, and improves the working efficiency and reliability of the lime kiln bucket elevator.

[0026] As a preferred embodiment, the countersunk bolt 4 has a slot 41 or a cross groove at the center of the top surface of its head. The slotted or Phillips head design 41 offers numerous advantages. In practical operation, when tightening or loosening countersunk bolts 4 using tools, the slotted or Phillips head design 41 is perfectly compatible with common screwdrivers, allowing workers to operate quickly and accurately. Furthermore, this slot design ensures good contact between the tool and the bolt head during tightening, preventing slippage and thus avoiding damage to the bolt head, extending the service life of the countersunk bolts 4. Simultaneously, it improves installation and disassembly efficiency, reduces equipment downtime for maintenance, and further ensures the normal operation of the lime kiln bucket elevator.

[0027] The installation process for countersunk bolt 3 is as follows: Countersunk bolt holes 3 are pre-machined on the outer chain plate. During installation, first, an anti-loosening washer 6 is placed on the thread of the countersunk bolt 4, and then the head of the countersunk bolt 4 is inserted into the countersunk bolt hole 3, so that the top surface of its head is not higher than the surface of the outer chain plate. Next, the thread of the countersunk bolt 4 is passed through the connecting lugs of the outer chain plate and the hopper 2 in sequence; After the bolt is passed through, first put the locking plate 7 on the tail of the screw, and then tighten the lock nut 5. After tightening the lock nut 5 to the specified preload using a tool, bend the locking lug 71 on the side of the locking plate 7 upward so that it fits tightly against the side plane of the lock nut 5, thereby achieving mechanical locking.

[0028] The installation procedure for spring clamping device 9 is as follows: The device is fixedly installed on the outer chain plate via welding or bolting to its sleeve 91 base, and its position should be close to the connecting ear plate of the hopper 2. After installation, under the preload of the clamping spring 93, the toothed surface of the clamping block 92 will tightly press against the back of the connecting ear plate of the hopper 2, providing a continuous and stable clamping force. This force is in the same direction as the preload of the countersunk bolt 4, and together they act on the mating surface of the hopper and the chain, effectively suppressing vibration.

[0029] Finally, the protective cover 8 is fastened to the opening of the countersunk bolt hole 3 using its snap-fit ​​structure 81, completing all installation steps.

[0030] The working principle of this device is as follows: When the hoist is running, the severe vibration will attempt to cause slight separation at the connection interface, resulting in a decrease in bolt preload. At this time, the clamping spring 93 in the spring clamping device 9 will push the clamping block 92 to compensate for this small gap in time, and always maintain the clamping state of the connection surface, thereby fundamentally eliminating the cause of bolt loosening. The countersunk head structure, anti-loosening washer 6, and locking plate 7 provide additional anti-loosening protection from different angles.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art, and their specifications and models can be selected according to actual conditions.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical embodiments described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A loosening-preventing device for a lime kiln bucket elevator, said bucket elevator comprising a chain (1) and a bucket (2) fixed to the outer chain plate of the chain by a connecting piece, said chain (1) consisting of an inner chain plate, an outer chain plate, a pin and a roller, characterized in that: It also includes an anti-loosening device, which comprises: Countersunk bolt holes (3) and matching countersunk bolts (4) are provided on the outer chain plate. The head of the countersunk bolt (4) is completely accommodated in the countersunk bolt hole (3). Its screw part passes through the connecting ear plate of the outer chain plate and the hopper (2) in sequence and is fastened by the anti-loosening nut (5). The spring clamping device (9) located between the connecting lug plate of the hopper (2) and the outer chain plate includes a sleeve (91) fixed to the outer chain plate and a clamping block (92) that can slide inside the sleeve (91). The clamping block (92) continuously applies clamping force to the connecting lug plate of the hopper (2) through a clamping spring (93).

2. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 1, characterized in that An anti-loosening washer (6) is pressed between the head of the countersunk bolt (4) and the bottom surface of the countersunk bolt hole (3), and the anti-loosening washer (6) is sleeved on the thread of the countersunk bolt (4).

3. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 2, characterized in that The anti-loosening washer (6) is a disc spring washer or a serrated locking washer.

4. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 1, characterized in that A locking plate (7) is provided between the anti-loosening nut (5) and the connecting lug of the hopper (2). The locking plate (7) has a through hole in the center for the screw of the countersunk bolt (4) to pass through, and a locking lug (71) on its side that can be bent and fits tightly against the side plane of the anti-loosening nut (5).

5. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 1, characterized in that The opening of the countersunk bolt hole (3) is also covered by a protective cover (8), which is fixed to the surface of the outer chain plate by a snap-fit ​​structure (81) on its edge.

6. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 1, characterized in that The surface of the clamping block (92) of the spring clamping device (9) that contacts the connecting lug of the hopper (2) is a rough toothed surface.

7. A device for preventing the loosening of the load in a lime kiln bucket elevator according to claim 1, characterized in that The countersunk bolt (4) has a slot (41) or cross groove at the center of the top surface of its head.

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