Protective device of hydraulic shovel big arm power hydraulic oil pipe

Abstract

The invention provides a protective device of a hydraulic shovel big arm power hydraulic oil pipe, belongs to the technical field of engineering machinery hydraulic system protection, and can at least partially solve the problems that most existing protective structures are single-layer flat plate or thin-wall structures, the strength and rigidity are limited, systematic buffering and energy absorption design is lacked, the structural sealing performance or the overall welding degree is high, and the service life is short. In order to solve the problems of difficult disassembly and assembly and long maintenance period of the existing power hydraulic oil pipe due to leakage or damage of the oil pipe, the power hydraulic oil pipe protection device comprises a connecting assembly, a hydraulic oil pipe bundle and a protection assembly, and through a composite protection structure composed of a protection plate and a buffer layer, direct impact of common falling objects such as large coal and gangue in a coal mine on the power hydraulic oil pipe is effectively prevented; impact force is dispersed along the cambered surface and then is secondarily absorbed and dissipated by the buffer layer, so that the impact load transmitted to the oil pipe is greatly reduced, and serious accidents such as oil pipe burst and oil leakage are completely eradicated.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic system protection technology for engineering machinery, and specifically relates to a protective device for the power hydraulic oil pipe of a hydraulic shovel boom. Background Technology

[0002] In open-pit coal mine stripping and loading operations, hydraulic shovels are widely used due to their large bucket capacity and high efficiency. The hydraulic shovel uses an electric motor to drive a hydraulic pump, which delivers hydraulic oil through the main hydraulic hoses to the boom, stick, bucket, and other actuators to achieve actions such as shoveling, lifting, and rotation. The main hydraulic hoses, located on the boom, withstand high pressure and high flow, and are key components ensuring the reliable operation of the hydraulic shovel. Damage to these hoses will lead to oil leaks and machine shutdowns, seriously affecting production progress and operational safety. During coal seam stripping, the bucket typically shovels coal and gangue from bottom to top. Large chunks of coal and gangue are prone to falling from heights during loading and rotation, and their trajectory often overlaps with the spatial position of the main hydraulic hoses on the boom. Especially under conditions of high dust, poor lighting, or nighttime operation, operators find it difficult to judge the positional relationship between falling objects and the hoses. Large masses can easily impact the boom area vertically or in near-free fall, directly striking or crushing the exposed hydraulic hoses.

[0003] In existing technologies, hydraulic hoses for the boom are mostly bundled along the outer side or top of the boom, secured only by pipe clamps, and are essentially exposed externally. Some use thin steel plates, rubber sleeves, or metal braided sleeves for simple protection. This type of protective structure has the following drawbacks: First, it is mostly a single-layer flat plate or thin-walled structure with limited strength and rigidity, unable to effectively disperse the vertical impact of large coal and gangue pieces, easily causing localized stress concentration, leading to deformation or even failure of the protective components, while the hoses are still damaged. Second, it lacks a systematic buffer and energy absorption design; there is no effective buffer layer between the protective components and the hoses, and the impact load is rigidly transmitted through the support, so the hoses may still be squeezed, bent, or have loosened joints. Third, the structure is highly sealed or has a high degree of overall welding; once the hoses leak or are damaged, disassembly and assembly are difficult, maintenance cycles are long, and it is difficult to adapt to the high-intensity, continuous operation conditions of open-pit mines, resulting in frequent hose breakage, long downtime, and a significant decrease in equipment reliability and operating efficiency. Therefore, we propose a protective device for the power hydraulic hoses of a hydraulic shovel boom. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a protective device for the power hydraulic oil pipe of the boom of a hydraulic shovel.

[0005] This invention provides a protective device for the power hydraulic oil pipe of a hydraulic shovel boom, comprising: A connecting assembly is disposed at one end of the hydraulic shovel boom facing the bucket, including a bracket disposed opposite to the end of the hydraulic shovel boom; Hydraulic hose bundle, including multiple power hydraulic hoses mounted on the bracket; and A protective assembly is disposed on the side of the hydraulic hose bundle away from the hydraulic shovel boom. The protective assembly includes a protective plate disposed along the extension direction of the hydraulic hose bundle and a buffer layer disposed on the side of the protective plate facing the hydraulic hose bundle. The two sides of the protective plate are connected to the bracket via connectors to keep the hydraulic oil pipe bundle within the safe area of ​​the protective assembly.

[0006] Furthermore, the protective plate is a rectangular arc-shaped steel plate, and the thickness of the protective plate ranges from 8 to 10 cm.

[0007] Specifically, the curvature of the protective plate matches the outer contour of the hydraulic hose bundle to disperse the impact force of falling objects.

[0008] Specifically, the buffer layer is a rubber buffer pad, and the thickness of the buffer layer ranges from 3 to 8 cm.

[0009] Preferably, the protective assembly further includes a limiting plate disposed on the side of the buffer layer facing the hydraulic oil tubing bundle for limiting the hydraulic oil tubing bundle.

[0010] Specifically, the hydraulic hose bundle also includes multiple sets of hose clamps connected to the hydraulic shovel boom.

[0011] Furthermore, the pipe clamp includes a base connected to the hydraulic shovel boom and a pressure plate connected to the base to reduce the swaying of the power hydraulic hose.

[0012] Furthermore, a rubber buffer sleeve is provided on the side of the pressure plate facing the power hydraulic oil pipe.

[0013] Furthermore, the connector is a pivot.

[0014] Specifically, the protective plate is connected to the bracket via a rotating shaft on both sides of one end facing the bucket. A driving component is provided on the bracket, and a driving gear is connected to the output end of the driving component. The driving gear meshes with a driven gear provided on the outer circumferential surface of the rotating shaft end, so as to drive the protective plate to rotate.

[0015] The beneficial effects of this invention are as follows: The composite protective structure, consisting of a protective plate and a buffer layer, effectively blocks the direct impact of falling objects such as large pieces of coal and gangue commonly found in coal mines on the power hydraulic oil pipes. The impact force is first dispersed along the arc surface and then absorbed and dissipated a second time by the buffer layer, which greatly reduces the impact load transmitted to the oil pipes and prevents serious accidents such as oil pipe rupture and oil leakage. The protective plate is made of rectangular arc-shaped steel plate that matches the outer contour of the oil pipe bundle. When a falling object hits, the impact force is dispersed tangentially along the arc surface and guided to both sides, changing the drawback of the local concentration of impact force of traditional flat protective plates and protecting the oil pipes below. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the protective device for the power hydraulic oil pipe of a hydraulic shovel boom according to a specific embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of the support structure of the protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to a specific embodiment of the present invention.

[0017] The components include: 1. Protective plate; 2. Buffer layer; 3. Bracket; 4. Drive component; 5. Driven gear; 6. Rotary shaft; and 7. Self-aligning roller bearing. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] A protective device for the power hydraulic oil pipe of a hydraulic shovel boom, provided in a specific embodiment of the present invention, includes: A connecting assembly is disposed at the end of the hydraulic shovel boom facing the bucket, including a bracket 3 disposed opposite to the end of the hydraulic shovel boom; a hydraulic oil pipe bundle including multiple power hydraulic oil pipes disposed on the bracket 3; and a protective assembly is disposed on the side of the hydraulic oil pipe bundle away from the hydraulic shovel boom, the protective assembly including a protective plate 1 disposed along the extension direction of the hydraulic oil pipe bundle, and a buffer layer 2 disposed on the side of the protective plate 1 facing the hydraulic oil pipe bundle; wherein, the two sides of the protective plate 1 are connected to the bracket 3 by connectors to keep the hydraulic oil pipe bundle within the safe area of ​​the protective assembly.

[0020] Specifically, the connecting assembly reliably positions the protective device as a whole at the end of the hydraulic shovel boom facing the bucket, providing an installation foundation and positioning reference for the hydraulic hose bundle and the protective assembly. By setting paired supports 3 on both sides of the boom end, a stable installation frame is formed in space, positioning the hydraulic hose bundle between the two supports 3, with the protective assembly positioned outside the hose bundle, thus clarifying the relative positional relationship of the three. This ensures, on the one hand, that a protective cavity with a predetermined gap is formed between the protective plate 1 and the hose bundle; on the other hand, it allows the load generated by the impact of falling objects to be transferred to the boom structure through the protective plate 1 and the supports 3, avoiding direct action on the hoses and improving the overall structural strength and reliability. Simultaneously, the connecting assembly is a modular structure, facilitating assembly and disassembly, which is beneficial for on-site installation and subsequent maintenance.

[0021] Furthermore, the hydraulic oil pipe bundle centrally arranges multiple power hydraulic oil pipes, forming a clear direction and relatively fixed cross-sectional profile through a unified bundle arrangement and fixation. On the one hand, this facilitates the matching design of the protective plate 1 and the buffer layer 2 according to the outer contour of the oil pipe bundle, making the geometry of the protective cavity clear and controllable; on the other hand, through centralized arrangement and subsequent pipe clamp fixation, it reduces the phenomenon of single oil pipes being suspended or swaying randomly, reducing the risk of fatigue damage and wear caused by vibration and mutual friction, while also facilitating maintenance and management.

[0022] Furthermore, the protective assembly forms a safety barrier and protective cavity on the side of the hydraulic tubing bundle away from the boom, physically isolating the impact loads from falling coal blocks, gangue, etc., from the tubing. The protective plate 1 is arranged along the extension direction of the tubing bundle, covering the area where the tubing bundle is located. In conjunction with the buffer layer 2, it ensures that the tubing bundle remains within the safe zone inside the protective assembly, preventing direct contact with falling objects. This provides rigid protection against direct vertical impacts from large masses, while the buffer layer 2 and the limiting structure achieve graded absorption and diversion of impact energy, significantly reducing the load transmitted to the tubing and improving the impact resistance and operational reliability of the tubing system.

[0023] Based on the above basic implementation method, the protective plate 1 is a rectangular arc-shaped steel plate with a thickness ranging from 8 to 10 cm. The curvature of the arc surface of the protective plate 1 matches the outer contour of the hydraulic oil pipe bundle to disperse the impact force of the falling object.

[0024] Specifically, the protective plate 1 is made of rectangular arc-shaped steel plate. The rectangular structure facilitates the coverage of the entire hazardous area of ​​the tubing bundle at the end of the boom, while also allowing for easy cutting, shaping, and installation based on the plate material. The manufacturing process is mature and the cost is controllable. The arc-shaped structure matches the circular outer contour of the tubing bundle. When coal or gangue falls from above, the impact force can be dispersed along the arc and deflected to both sides, transforming the impact that was originally concentrated at a point or a small section into a surface load on the surface of the protective plate 1. This reduces local stress concentration and lowers the risk of damage to the protective plate 1 and the support 3. The use of a thicker arc-shaped steel plate also provides sufficient bending stiffness and impact resistance, maintaining the stability of shape and protective performance under long-term high-intensity working conditions and extending the service life of the protective device.

[0025] In one specific embodiment, the buffer layer 2 is a rubber buffer pad, and the thickness of the buffer layer 2 ranges from 3 to 8 cm; the protective component also includes a limiting plate, which is disposed on the side of the buffer layer facing the hydraulic oil tubing bundle, for limiting the hydraulic oil tubing bundle.

[0026] In this embodiment, the buffer layer absorbs and dissipates the remaining impact energy dispersed by the protective plate 1. The natural rubber buffer pad possesses excellent elasticity and damping characteristics. When the protective plate 1 undergoes instantaneous deformation due to impact, the buffer layer 2 elastically compresses, converting some of the mechanical impact energy into internal friction and microscopic deformation energy, thereby significantly reducing the peak load transmitted to the tubing bundle direction. The predetermined thickness range of the buffer layer 2 ensures sufficient compression stroke and energy absorption capacity without being too soft, preventing excessive proximity between the tubing bundle and the protective plate, thus maintaining a reasonable size for the protective cavity. Furthermore, the buffer layer 2 is a detachable structure, easily replaceable after wear or aging, contributing to a long-term stable buffering effect.

[0027] Furthermore, the limiting plate provides additional spatial restraint and guidance for the tubing bundle. Positioned on the side of the buffer layer 2 closest to the tubing bundle, the limiting plate can laterally or vertically constrain the tubing bundle's position, ensuring it remains within a predetermined neutral and safe zone within the protective cavity. This prevents the tubing bundle from shifting under equipment vibration, impact, or long-term operating conditions, thus avoiding contact with the buffer layer 2 or protective plate 1 and subsequent compression and wear. Simultaneously, the limiting plate can guide small amounts of debris or small pieces, discharging them to both sides along the surface of the limiting plate and buffer layer, reducing debris accumulation on the tubing surface and further improving the safety and cleanliness of the tubing working environment.

[0028] In another specific embodiment, the hydraulic hose bundle also includes multiple sets of hose clamps connected to the hydraulic shovel boom; the hose clamps include a base connected to the hydraulic shovel boom and a pressure plate connected to the base, for reducing the swaying of the power hydraulic hoses.

[0029] Specifically, the pipe clamps reliably secure the hydraulic hose bundle to the boom of the hydraulic shovel, providing group support and positioning for multiple power hydraulic hoses. By connecting the base to the boom and clamping the hoses with pressure plates, radial and axial movement of the hoses is effectively limited, reducing fatigue bending, pipe wall wear, and collisions with adjacent components caused by vibration. Simultaneously, the pipe clamps maintain a reasonable spacing between the hoses, preventing friction and improving the overall stability and maintainability of the hose layout. They also provide a basis for the formation of a regular protective cavity profile for the protective components, allowing the protective plates and buffer layers to more precisely match the position of the hose bundle.

[0030] In one specific embodiment, the protective plate 1 is connected to the support 3 on both sides of the end facing the bucket via a rotating shaft. The support 3 is provided with a driving component 4, and the output end of the driving component 4 is connected to a driving gear. The driving gear meshes with the driven gear 5 provided on the outer peripheral surface of the end of the rotating shaft 6, so as to drive the protective plate 1 to rotate. The support 3 is provided with a self-aligning roller bearing 7, which is sleeved on the outer peripheral surface of the rotating shaft 6.

[0031] In this embodiment, the drive member 4 and its cooperating gear mechanism enable controlled rotation of the protective plate 1 between the protected position and the open position. By connecting one end of the protective plate 1 to the bracket 3 via a rotating shaft 6, and installing the drive member 4 on the bracket 3, the output end of the drive member 4 meshes with the driven gear on the outer circumferential surface of the rotating shaft 6 via a drive gear. This reliably transmits the rotational motion of the drive member 4 to the protective plate 1, allowing the protective plate 1 to rotate within a predetermined angle range. Thus, during normal equipment operation, the protective plate 1 can rotate to the protective position covering the oil pipe bundle, forming a complete protective cavity; during equipment maintenance or oil pipe upkeep, the protective plate 1 can rotate to the open position, facilitating the removal of the buffer layer 2 and access to the oil pipe bundle, significantly shortening maintenance time and improving maintenance efficiency.

[0032] Specifically, both the drive gear and the driven gear 5 are high-precision gears. Using high-precision gears as transmission components can reduce transmission clearance and improve the positioning accuracy of the protective plate 1 at different positions, avoiding the plate from shaking or impacting the support 3 or oil pipe due to excessive clearance. At the same time, high-precision gears have smooth meshing, low noise, and strong load-bearing capacity, and have better durability and reliability under the high impact and high dust conditions of open-pit mines. This helps to ensure that the protective plate 1 rotates stably within the set trajectory range for a long time, maintaining the consistency and safety of the protective state.

[0033] In another specific embodiment, a rubber buffer sleeve is provided on the side of the pressure plate facing the power hydraulic oil pipe.

[0034] Furthermore, the connecting component is a rotating shaft, and the driving component is a motor.

[0035] To aid in a better understanding of the invention, a more comprehensive and specific embodiment is described, in which the invention provides a protective device for the power hydraulic hose of a hydraulic shovel boom, comprising: A connecting assembly is disposed at the end of the hydraulic shovel boom facing the bucket, including a bracket 3 disposed opposite to the end of the hydraulic shovel boom; a hydraulic oil pipe bundle including multiple power hydraulic oil pipes disposed on the bracket 3; and a protective assembly is disposed on the side of the hydraulic oil pipe bundle away from the hydraulic shovel boom, the protective assembly including a protective plate 1 disposed along the extension direction of the hydraulic oil pipe bundle, and a buffer layer 2 disposed on the side of the protective plate 1 facing the hydraulic oil pipe bundle; wherein, the two sides of the protective plate 1 are connected to the bracket 3 by connectors to keep the hydraulic oil pipe bundle within the safe area of ​​the protective assembly.

[0036] In this embodiment, the protective plate 1 is a rectangular arc-shaped steel plate with a thickness ranging from 8 to 10 cm. The curvature of the protective plate 1 matches the outer contour of the hydraulic oil pipe bundle to disperse the impact force of falling objects. The buffer layer 2 is a rubber buffer pad with a thickness ranging from 3 to 8 cm. The protective assembly also includes a limiting plate, which is disposed on the side of the buffer layer 2 facing the hydraulic oil pipe bundle to limit the hydraulic oil pipe bundle. The hydraulic oil pipe bundle also includes multiple sets of pipe clamps connected to the hydraulic shovel boom. The pipe clamps include a base connected to the hydraulic shovel boom and a pressure plate connected to the base to reduce the shaking of the power hydraulic oil pipes. The protective plate 1 is connected to the support 3 on both sides of the end facing the bucket via a rotating shaft 6. The support 3 is provided with a driving component 4, and the output end of the driving component 4 is connected to a driving gear. The driving gear meshes with the driven gear 5 disposed on the outer circumferential surface of the end of the rotating shaft 6 to drive the protective plate 1 to rotate.

[0037] Specifically, a rubber buffer sleeve is provided on the side of the pressure plate facing the power hydraulic oil pipe, and the connecting part is a rotating shaft 6.

[0038] In summary, the embodiments disclosed herein have at least the following technical effects: The composite protective structure consisting of protective plate 1 and buffer layer 2 effectively blocks the direct impact of falling objects such as large pieces of coal and gangue commonly found in coal mines on the power hydraulic oil pipe. The impact force is first dispersed along the arc surface and then absorbed and dissipated by the buffer layer 2, which greatly reduces the impact load transmitted to the oil pipe and prevents serious accidents such as oil pipe rupture and oil leakage. The protective plate 1 is made of a rectangular arc-shaped steel plate that matches the outer contour of the tubing bundle. When a falling object hits, the impact force is dispersed tangentially along the arc and guided to both sides, which changes the disadvantage of the local concentration of impact force of the traditional flat protective plate and protects the tubing below. A 3-8cm thick rubber buffer pad is installed between the steel plate and the tubing bundle to further absorb the remaining energy after it has been dispersed by the steel plate, forming a double protection mechanism of rigid dispersion + flexible energy absorption. Even if an extremely large falling object occurs, the impact load can be controlled within the safe range that the tubing can withstand. Multiple sets of pipe clamps with pressure plates are added to firmly fix the power hydraulic oil pipes to the boom, which greatly reduces the rotation and mutual friction of the oil pipes under digging and slewing conditions, further extending the service life of the oil pipes and reducing the risk of fatigue failure. The protective plate 1 is connected to the bracket 3 via the rotating shaft 6, and is electrically rotated by the drive component 4 and gear transmission. The protective plate 1 can be rotated to a fully open position, and the oil tubing bundle and buffer layer can be inspected, replaced, and tightened for routine maintenance without disassembling the entire protective plate. This can be completed by a single person in a few minutes, greatly reducing the labor intensity and downtime of downhole maintenance.

[0039] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A protective device for the power hydraulic hose of a hydraulic shovel boom, characterized in that, include: A connecting assembly is disposed at one end of the hydraulic shovel boom facing the bucket, including a bracket disposed opposite to the end of the hydraulic shovel boom; The hydraulic hose bundle includes multiple power hydraulic hoses mounted on the bracket; as well as A protective assembly is disposed on the side of the hydraulic hose bundle away from the hydraulic shovel boom. The protective assembly includes a protective plate disposed along the extension direction of the hydraulic hose bundle and a buffer layer disposed on the side of the protective plate facing the hydraulic hose bundle. The two sides of the protective plate are connected to the bracket via connectors to keep the hydraulic oil pipe bundle within the safe area of ​​the protective assembly.

2. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 1, characterized in that, The protective plate is a rectangular arc-shaped steel plate, and the thickness of the protective plate ranges from 8 to 10 cm.

3. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 2, characterized in that, The curvature of the protective plate matches the outer contour of the hydraulic oil pipe bundle to disperse the impact force of falling objects.

4. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 1, characterized in that, The buffer layer is a rubber buffer pad, and the thickness of the buffer layer ranges from 3 to 8 cm.

5. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 1, characterized in that, The protective assembly also includes a limiting plate disposed on the side of the buffer layer facing the hydraulic oil tubing bundle, for limiting the hydraulic oil tubing bundle.

6. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 1, characterized in that, The hydraulic hose bundle also includes multiple sets of hose clamps connected to the hydraulic shovel boom.

7. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 6, characterized in that, The pipe clamp includes a base connected to the hydraulic shovel boom and a pressure plate connected to the base, for reducing the swaying of the power hydraulic hose.

8. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 7, characterized in that, A rubber buffer sleeve is provided on the side of the pressure plate facing the power hydraulic oil pipe.

9. The protective device for the power hydraulic oil pipe of the hydraulic shovel boom according to claim 1, characterized in that, The connector is a rotating shaft.

10. The protective device for the power hydraulic hose of the hydraulic shovel boom according to any one of claims 1 to 9, characterized in that, The protective plate is connected to the bracket via a rotating shaft on both sides of one end facing the bucket. A driving component is provided on the bracket, and a driving gear is connected to the output end of the driving component. The driving gear meshes with a driven gear provided on the outer circumferential surface of the rotating shaft end, so as to drive the protective plate to rotate.

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