A kind of anti-falling device for cleaning machine cantilever hook

Abstract

The present application relates to the technical field of cantilever hook, and discloses a device for preventing the cantilever hook of a trash cleaner from falling off, which comprises a blocking disc, a ring barrel and a bolt, the blocking disc is connected to one end of the ring barrel, the other end of the ring barrel is provided with a baffle, an open slot is formed in the sidewall of the ring barrel, the bolt is inserted into the ring barrel and located on the side of the baffle away from the blocking disc, the ring barrel is used for being inserted into a groove of the hook, the blocking disc and the baffle are respectively used for abutting against two sides of the hook, the open slot is used for clamping a lifting chain on the cantilever hook of the trash cleaner, and the bolt is used for preventing the lifting chain from sliding out of the open slot into the ring barrel. The device can prevent the lifting chain in the groove of the hook from falling off due to water flow and disturbance of silt, improve the working efficiency during trash cleaning, and reduce the maintenance and installation costs.

Description

Technical Field

[0001] This invention relates to the field of cantilever hook technology, specifically an anti-detachment device for cantilever hooks of cleaning machines. Background Technology

[0002] Existing cantilever hooks generally use traditional locking plate type anti-disengagement devices. This device has a core structure of spring, metal locking plate and pin. It relies on the spring force to drive the locking plate to rotate in one direction with the pin as the fulcrum, so as to block one side of the hook opening.

[0003] From an operational perspective, the six-lobed grab bucket, suspended by the cantilever hook of the cleaning machine, is subjected to multiple forces during underwater lifting and lowering, including the impact of reservoir water flow, silt disturbance, and changes in the grab bucket's own weight. This makes it highly susceptible to lateral swaying exceeding 30°. This non-linear lateral tension acts directly on the locking pin, easily causing pin deformation and locking plate jamming, preventing the locking plate from fully closing. Simultaneously, suspended silt, floating aquatic plants, and other impurities in the reservoir water can easily enter the transmission gap between the spring and the locking plate, causing spring corrosion and elasticity attenuation, further reducing the reliability of the locking plate's closure.

[0004] According to operation and maintenance data, traditional locking-plate anti-detachment devices experience an average of 2-3 detachment failures per month during underwater cleaning operations. Detachment incidents can trigger serious chain reactions. When the six-lobed grab bucket of the cleaning machine falls underwater, it not only interrupts cleaning operations, affecting the dam's flood discharge capacity and the normal operation of the generator units, resulting in a loss of daily power generation, but also necessitates the organization of professional diving teams for underwater salvage operations. Each salvage operation is costly, and divers face multiple safety risks underwater, including suffocation, entanglement in underwater debris, and water current impact, posing a significant challenge to safety management, severely impacting the continuity of cleaning operations, and further increasing operating costs. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-detachment device for the cantilever hook of a cleaning machine, which can prevent the chain in the hook groove from detaching due to water flow and mud disturbance, thereby improving the efficiency of cleaning while reducing maintenance and installation costs.

[0006] The objective of this invention can be achieved through the following technical solutions: An anti-detachment device for the cantilever hook of a cleaning machine includes a sealing disc, an annular barrel, and a pin. The sealing disc is connected to one end of the annular barrel, and a baffle is provided at the other end of the annular barrel. An opening groove is opened on the side wall of the annular barrel. The pin is inserted into the annular barrel and is located on the side of the baffle away from the sealing disc. The annular barrel is used to insert into the hook groove. The sealing disc and the baffle are respectively used to abut against the two sides of the hook. The opening groove is used to lock and limit the lifting chain on the cantilever hook of the cleaning machine. The pin is used to prevent the lifting chain from completely sliding out of the opening groove into the annular barrel.

[0007] Furthermore, a baffle is fitted onto the annular barrel, and multiple connecting rods are installed outside the annular barrel. One end of the connecting rod is detachably connected to the annular barrel, and the other end is connected to the sealing disc.

[0008] Furthermore, the anti-detachment device also includes a locking plate, a torsion spring, and a pin. The pin is rotatably connected to the upper end of the hook groove, the locking plate is connected to the pin and rotates on the opening of the hook groove, the locking plate is used to seal the opening, and the torsion spring is connected between the locking plate and the upper end of the hook groove.

[0009] Furthermore, the slot is adapted to the outer wall of one link of the chain.

[0010] Furthermore, the gap between the opening slot and the outer wall of the chain link is less than or equal to 5 mm.

[0011] Furthermore, the shape of the middle part of the annular barrel is adapted to the shape of the hook groove, and the fit is greater than or equal to 95%.

[0012] Furthermore, a handle is provided on the side of the sealing disc away from the annular barrel.

[0013] Furthermore, the pin includes a screw and a nut, and the cylindrical wall of the annular barrel has a insertion hole, through which the screw is inserted and threadedly connected to the nut.

[0014] Furthermore, the shape of the sealing disc near the annular barrel matches the shape of the outer wall on one side of the hook, and the shape of the baffle near the sealing disc matches the shape of the outer wall on the other side of the hook.

[0015] Furthermore, the gravity of the anti-detachment device is greater than or equal to the disturbance force exerted on the anti-detachment device by the water flow and silt.

[0016] The beneficial effects of this invention are: This invention uses a sealing disc, annular barrel, and baffle to match the groove of the hook for mutual restraint and partial enclosure of the groove. This enclosure prevents water and sediment from disturbing the hook. At the same time, the opening groove and pin limit the swing of the chain during operation, allowing only small swings of the chain and the annular barrel it drives to facilitate operation. This reduces the disturbance of water and sediment. Compared with traditional locking plate anti-detachment devices, this invention has stronger anti-detachment ability, is less prone to deformation, and has lower usage and maintenance costs.

[0017] This invention, by matching the sealing disc and the annular barrel with the hook groove, and by utilizing the self-weight of the entire anti-detachment device, can reduce the disturbance effect of water flow and sediment, allowing it to remain stably located within the hook groove and preventing the chain from easily dragging the hook during operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of an anti-detachment device for a cantilever hook of a cleaning machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of an anti-detachment device for the cantilever hook of a cleaning machine in an embodiment of the present invention; Figure 3 This is a side view schematic diagram of an anti-detachment device for a cantilever hook of a cleaning machine according to an embodiment of the present invention; Figure 4 This is a front view schematic diagram of an anti-detachment device for a cantilever hook of a cleaning machine according to an embodiment of the present invention; In the diagram: 1. Sealing plate; 2. Annular barrel; 21. Opening groove; 22. Insertion hole; 3. Pin; 31. Screw; 32. Nut; 4. Baffle; 5. Connecting rod; 6. Handle; 7. Hook; 70. Groove; 8. Lifting chain. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, an anti-detachment device for the cantilever hook of a cleaning machine includes a sealing disc 1, an annular barrel 2, and a pin 3. The sealing disc 1 is connected to one end of the annular barrel 2, and a baffle 4 is provided at the other end of the annular barrel 2. The annular barrel 2 has openings on its side wall as shown in the diagram. Figure 4 The opening slot 21 shown has the pin 3 inserted into the annular barrel 2 and located on the side of the baffle 4 away from the sealing disc 1, as shown. Figure 2 As shown, the annular barrel 2 is used to be inserted into the groove 70 of the hook 7, the sealing plate 1 and the baffle 4 are respectively used to abut against the two sides of the hook 7, the opening groove 21 is used to lock the lifting chain 8 on the cantilever hook 7 of the limiting cleaning machine, and the pin 3 is used to prevent the lifting chain 8 from completely sliding out of the opening groove 21 into the annular barrel 2.

[0022] Its working principle and installation method are as follows: Figure 2As shown, the chain 8 is secured between the groove 70 of the hook 7 and the ring barrel 2 via the annular barrel 2. The opening groove 21 and the pin 3 limit the large-amplitude movement of the chain 8, preventing water flow and silt disturbance in the reservoir area from causing the chain 8 to swing excessively and easily detach from the hook 7. At the same time, since the entire device is set inside the groove 70 of the hook 7, the annular barrel 2, the baffle 4, and the sealing plate 1 match the groove 70 of the hook 7. The weight of the entire anti-detachment device can press it tightly inside the groove 70 of the hook 7, preventing water flow and silt disturbance in the reservoir area. Also, due to the matching and limitation of the shape with the groove 70 of the hook 7, it can also prevent it from detaching from the groove 70, but it does not affect the small swing of the chain 8, which facilitates the operation of the chain 8. At the same time, it can reduce the impact of the chain 8 on the groove 70 of the hook 7 and on itself, thus achieving a good anti-detachment effect.

[0023] In some embodiments, such as Figure 1 As shown, the baffle 4 is fitted onto the annular barrel 2, and multiple connecting rods 5 are provided on the outside of the annular barrel 2. One end of each connecting rod 5 is detachably connected to the annular barrel 2, and the other end is connected to the sealing disc 1. This facilitates the removal and installation of the entire device from the groove 70 of the hook 7.

[0024] In some embodiments, the anti-detachment device further includes a locking plate, a torsion spring, and a pin. The pin is rotatably connected to the upper end of the groove 70 of the hook 7. The locking plate is connected to the pin and rotates on the opening of the groove 70 of the hook 7, and the locking plate is used to lock the opening. The torsion spring is connected between the locking plate and the upper end of the groove 70 of the hook 7. A conventional anti-detachment device is also used above the groove 70, which can further prevent the annular barrel 2 from detaching from the groove 70 due to a large external force impact.

[0025] In some embodiments, such as Figure 2 As shown, the opening slot 21 is adapted to the outer wall of one link of the chain 8. This allows for a good movable connection with the chain link.

[0026] In some embodiments, the gap between the opening slot 21 and the outer wall of the chain link is less than or equal to 5 mm. This prevents the chain link from swinging too much within the opening slot 21, thus avoiding excessive disturbance to the annular barrel 2.

[0027] In some embodiments, the shape of the middle part of the annular barrel 2 is adapted to the shape of the groove 70 of the hook 7, and the fit is greater than or equal to 95%. This allows the annular barrel 2 to be well embedded in the groove 70 of the hook 7.

[0028] In some embodiments, a handle 6 is provided on the side of the sealing disc 1 away from the annular barrel 2. The handle 6 facilitates pulling the annular barrel 2 out of the groove 70 of the hook 7 after the connecting rod 5 is disassembled from the baffle 4.

[0029] In some embodiments, such as Figure 1 As shown, the pin 3 includes a screw 31 and a nut 32, and the annular barrel 2 has a groove on its wall as shown. Figure 3 As shown in the diagram, the screw 31 is inserted into the socket 22 and then threadedly connected to the nut 32. This facilitates the connection between the pin 3 and the annular barrel 2, as well as the disassembly of the pin 3.

[0030] In some embodiments, the shape of the sealing disc 1 near the annular barrel 2 matches the shape of one side of the outer wall of the hook 7, and the shape of the baffle 4 near the sealing disc 1 matches the shape of the other side of the outer wall of the hook 7. This facilitates the embedding of the sealing disc 1 and the baffle 4 into both sides of the groove 70 of the hook 7, reducing the disturbance force of water flow, sediment, etc.

[0031] In some embodiments, the weight of the anti-detachment device is greater than or equal to the disturbance force exerted by the water flow and sediment on the anti-detachment device. This ensures that the anti-detachment device is firmly fixed within the groove 70 of the hook 7. The sealing plate 1, etc., can be made of No. 45 steel, with a thickness of ≥12mm, a diameter of 300mm, a curvature of R150mm, a fit of ≥95%, and a rotation angle of 0°~120°, fitting the hook 7 opening 360°. This limits the impact of the grab bucket and prevents the anti-detachment device from slipping out of the groove 70.

[0032] Traditional locking-plate anti-disengagement devices employ a single-degree-of-freedom linear transmission structure, consisting of three core components: a spring, a metal locking plate, and a pin. While simple in structure and low in manufacturing cost, they inherently suffer from deficiencies in protective performance and stability. The locking plate, fulcrumd by the pin, can only rotate within 90° in one direction, relying on the linear elasticity of the spring to block one side of the hook opening. This limited protection range fails to cover the entire area of ​​the hook opening. Furthermore, the spring, as the sole power source, is prone to corrosion and aging in humid environments, resulting in rapid elasticity decay. It also cannot handle the nonlinear lateral forces generated by the grab bucket's swing, making incomplete locking plate closure highly likely under complex operating conditions. In addition, traditional devices typically use welding or bolt connections, adapting only to a single hook size, resulting in poor versatility. Replacement requires modification of the crane hook, which is time-consuming and labor-intensive.

[0033] See Figure 2As shown, the anti-detachment device of the present invention has a fitting degree of over 95% with the groove 70 of the hook 7, achieving a 360° full-wrap fit to the opening of the hook 7, completely eliminating blind spots in protection; it can be connected to the sealing plate 1 at one end and the baffle 4 at the other end through four sets of connecting rods 5 made of 40Cr alloy steel, and the axial movement of the baffle 4 is restricted by the insertion of pins 3, supporting the entire device to rotate in multiple directions from 0° to 120° within the groove 70 of the hook 7, which can flexibly adapt to the complex posture of the grab bucket swinging underwater, effectively decomposing and offsetting the impact of lateral tension on the device; no modification to the crane hook 7 body is required, greatly improving the ease of installation.

[0034] In terms of operational adaptability, traditional locking plate devices are limited by their structure and have poor impact resistance. The lateral force generated by the swing of the grab bucket easily causes deformation of the locking plate and pin, resulting in locking plate jamming. In a simulated working condition test with the grab bucket fully loaded with 10 tons of mud and sand and swinging 30° underwater, the unhooking rate is as high as 15%. Secondly, they have weak anti-pollution ability. Mud, sand, aquatic plants and other impurities can easily enter the transmission gap between the spring and the locking plate, causing the spring to rust and the locking plate to malfunction. Even after cleaning, jamming is very likely to occur again, and the locking plate closure rate is less than 80%. Thirdly, they have poor environmental adaptability. In the low temperature environment of -10℃ in the reservoir area, the spring is prone to failure due to low temperature embrittlement. In the high temperature environment of 60℃ in summer, the spring elasticity will decrease sharply, making it unable to adapt to the extreme temperature changes in the Bazhan Reservoir area. In seasons with large temperature differences, the failure rate increases significantly.

[0035] This invention's anti-disengagement device features comprehensive structural optimization for underwater operations, offering far superior operational adaptability compared to traditional devices. In terms of impact resistance, the outer layer of the sealing disc 1 is made of a 14mm thick steel plate, effectively limiting the rigid impact from the grab's swing and preventing damage from collisions. The multi-degree-of-freedom design flexibly decomposes lateral tension, ensuring the sealing disc 1 remains tightly fitted to the side of the hook 7 groove 70. Under the same full-load swing test conditions, the disengagement rate is 0, completely eliminating the risk of disengagement. Regarding environmental adaptability, all metal components of the device undergo integral quenching treatment, achieving a hardness of HRC45 or higher, ensuring stable mechanical properties. Within a temperature range of -10℃ to 60℃, it will not exhibit embrittlement, deformation, or corrosion, adapting to various extreme weather conditions and temperature changes, with an annual failure rate controlled below 0.5%.

[0036] Traditional locking devices suffer from short service life and frequent malfunctions due to mud and sand blockage, as springs and locking plates are core vulnerable components. In contrast, the anti-detachment device of this invention employs a purely mechanical rigid structure, significantly reducing maintenance costs and frequency. All core components are made of high-strength alloy steel and steel plates, with the sealing disc 1 having a service life of up to 5 years. Replacement of components requires no specialized tools and can be performed by on-site maintenance personnel, further enhancing ease of use. Simultaneously, the anti-detachment device's surface is treated with anti-corrosion coating, effectively resisting water corrosion, extending component lifespan, and reducing spare parts replacement costs.

[0037] This invention's anti-detachment device boasts significant advantages in terms of low cost and high versatility, reducing the modification cost of the hook 7. In terms of versatility, no modification to the crane hook 7 body is required, and the installation and adaptation time is ≤1 hour, meeting the usage requirements of different working conditions and greatly expanding the device's applicability. From an operational efficiency perspective, the device's high reliability increases the effective working hours for cleaning operations by 40%, avoiding power generation losses and salvage costs caused by hook detachment accidents. Based on an average of 2 days of bottom sill cleaning operations per machine per year, it can generate at least over 100,000 yuan in direct economic benefits. Simultaneously, the device's long-life design and low maintenance frequency further reduce the average annual maintenance cost, saving substantial operating expenses.

[0038] The installation and operation of the device are simple and convenient, requiring no professional technical training. On-site operators can quickly master the process, effectively improving the efficiency of cleaning operations. During the locking process, no manual adjustment or operation is needed. After the grab bucket's lifting ring is placed into the hook 7, its own design structure triggers gravity self-locking, achieving an anti-detachment function. The entire process requires no additional steps. During the unlocking process, simply moving the unlocking pin 3 on the side of the device allows for smooth disassembly. The cylindrical sealing plate 1 can rotate freely to 120° under the drive of the linkage mechanism, facilitating the removal and placement of the grab bucket's lifting ring. Compared to traditional devices that require cumbersome steps such as manually adjusting the locking plate position, checking the spring condition, and clearing transmission gaps, this device significantly simplifies the operation process, reducing the operation time of a single grab bucket lifting and lowering operation by more than 30%, further improving the efficiency of cleaning operations.

[0039] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An anti-detachment device for the cantilever hook of a cleaning machine, characterized in that, The device includes a sealing disc (1), an annular barrel (2), and a pin (3). The sealing disc (1) is connected to one end of the annular barrel (2), and a baffle (4) is provided at the other end of the annular barrel (2). An opening groove (21) is provided on the side wall of the annular barrel (2). The pin (3) is inserted into the annular barrel (2), and the pin (3) is located on the side of the baffle (4) away from the sealing disc (1). The annular barrel (2) is used to insert into the groove (70) of the hook (7). The sealing disc (1) and the baffle (4) are respectively used to abut against the two sides of the hook (7). The opening groove (21) is used to lock the lifting chain (8) on the cantilever hook (7) of the limit cleaning machine. The pin (3) is used to prevent the lifting chain (8) from completely sliding out of the opening groove (21) into the annular barrel (2).

2. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The baffle (4) is fitted onto the annular barrel (2), and a plurality of connecting rods (5) are provided outside the annular barrel (2). One end of the connecting rod (5) is detachably connected to the annular barrel (2), and the other end is connected to the sealing plate (1).

3. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The anti-detachment device also includes a locking plate, a torsion spring and a pin. The pin is rotatably connected to the upper end of the groove (70) of the hook (7). The locking plate is connected to the pin and rotates on the opening of the groove (70) of the hook (7). The locking plate is used to lock the opening. The torsion spring is connected between the locking plate and the upper end of the groove (70) of the hook (7).

4. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The opening slot (21) is adapted to the outer wall of a link of the chain (8).

5. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 4, characterized in that, The gap between the opening groove (21) and the outer wall of the chain link is less than or equal to 5 mm.

6. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The shape of the middle part of the annular barrel (2) is adapted to the shape of the groove (70) of the hook (7), and the fit is greater than or equal to 95%.

7. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 2, characterized in that, A handle (6) is provided on the side of the sealing disc (1) away from the annular barrel (2).

8. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The pin (3) includes a screw (31) and a nut (32). The annular barrel (2) has a socket (22) on its wall. The screw (31) is inserted into the socket (22) and then threadedly connected to the nut (32).

9. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The shape of the sealing disc (1) near the annular barrel (2) matches the shape of the outer wall of the hook (7) on one side, and the shape of the baffle (4) near the sealing disc (1) matches the shape of the outer wall of the hook (7) on the other side.

10. The anti-detachment device for the cantilever hook of a cleaning machine according to claim 1, characterized in that, The gravity of the anti-detachment device is greater than or equal to the disturbance force exerted on the anti-detachment device by the water flow and silt.

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