Lifting machine suitable for earthwork exchange station in tunnel

Abstract

The utility model discloses a lifting machine suitable for an earthwork exchange station in a tunnel, and relates to the technical field of pipeline construction. Comprising two oppositely-arranged lifting frames and hydraulic control systems of the lifting frames, each lifting frame comprises a stand column and a bracket connected to the stand column, each bracket comprises a trapezoidal connecting frame and a supporting table, each supporting table is connected to the lower end of the corresponding connecting frame, and the length of each supporting table is larger than the bottom edge of the corresponding connecting frame; the connecting frame is connected to the stand column in a lifting mode through a hydraulic control system. The hydraulic control system comprises an oil cylinder mechanism, a valve mechanism and an oil tank. The device reduces cost, and is simple in structure and easy to maintain and operate. A serial differential hydraulic cylinder is matched with a chain to serve as a power unit, so that the lifting speed is increased, and meanwhile, the height of the lifting machine body is reduced; and a trapezoidal fixed bracket is designed, so that the hopper can still be normally lifted within a certain error range. According to the utility model, the efficiency and the safety of earthwork treatment are obviously improved, the variable requirements of tunnel construction are met, and reliable technical guarantee is provided for tunnel engineering.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline construction, and particularly relates to a lift applicable to an earthwork transfer station in a tunnel. Background Art

[0002] During the tunnel construction process, the excavation, transportation, and treatment of earthwork are crucial links. To improve construction efficiency, an earthwork transfer station is usually set up in the tunnel for temporarily storing and transporting the excavated earthwork materials. In the earthwork transfer station, the lift is one of the key devices, and its design and function directly affect the efficiency of earthwork treatment and the construction progress.

[0003] Traditional lifts are mainly applied in automobile repair shops. Their basic structures and principles have certain reference values, but their working principles and specific designs are not fully applicable to the tunnel construction environment. The basic principle of the double-column lift used in traditional automobile repair shops is as follows: (1) Double-column structure: The double-column lift supports the entire lifting platform through two vertical columns and uses a hydraulic system to achieve the lifting and lowering of the platform. (2) Single-acting hydraulic cylinder: Traditional double-column lifts usually use single-acting hydraulic cylinders for lifting operations. The hydraulic cylinder pushes the piston to move through the pressure of hydraulic oil to achieve the rise and fall of the platform. (3) Balancing wire ropes: To ensure the balance of the double-column lift during the lifting process, a balancing wire rope system is usually used. The balancing wire ropes are guided by pulleys and are mutually restricted with the rope pulley group through the platform at the bottom end of the double columns or the connecting rod at the top end of the double columns to achieve bilateral leveling. (4) Scissor-type brackets: Traditional lifts use scissor-type brackets to support the automobile chassis. The scissor-type bracket structure is flexible and can be adjusted according to different specifications of the automobile chassis. The operator needs to align the bracket with the longitudinal beam of the automobile chassis to ensure uniform force during the lifting process and avoid damage to the vehicle chassis.

[0004] Although the double-column lift in traditional automobile repair shops has its unique advantages in design and function, there are still some limitations in the earthwork treatment process of tunnel construction: (1) Poor adaptability: Traditional lifts are mainly designed for automobiles, and their structures and functions are difficult to directly apply to the earthwork treatment of tunnel construction. The environment in the tunnel is complex. There are small vehicles and hoppers passing through at the bottom end of the tunnel, and the space is narrow. After the hopper is lifted, the height at the top is too high, and there is no space for connecting the balancing wire ropes. The volume and structure of traditional lifts are difficult to adapt. (2) Complicated manual operation: Traditional lifts require the operator to manually adjust the position of the bracket, which requires high operation skills and experience. In the tunnel construction environment, the operable space for the operator is limited, and the complexity and time cost of manual operation are significantly increased. (3) Limited lifting height: The lifting height of traditional double-column lifts is usually limited by the height of the columns and cannot meet the earthwork treatment requirements at different heights in tunnel construction. Content of the Utility Model

[0005] In view of the deficiencies of the above-mentioned prior art, the present utility model provides a lifting machine applicable to the earthwork exchange station in a tunnel.

[0006] The technical solution adopted by the present utility model to achieve the above object is as follows: A lifting machine applicable to the earthwork exchange station in a tunnel, characterized in that it includes two oppositely arranged lifting frames and its hydraulic control system. The lifting frame includes a column and a bracket connected to the column. The bracket includes a trapezoidal connecting frame and a platform. The platform is connected to the lower end of the connecting frame, and its length is greater than the bottom side of the connecting frame. The connecting frame is connected to the column through the hydraulic control system and can be lifted and lowered. The hydraulic control system includes an oil cylinder mechanism, a valve mechanism, and an oil tank. The oil cylinder mechanism includes a main oil cylinder and an auxiliary oil cylinder connected together. The auxiliary oil cylinder is directly connected to the oil tank, and the main oil cylinder is connected to the oil tank through the valve mechanism. The valve mechanism includes an electromagnetic unloading valve, a safety valve, a check valve, and a speed control valve. The electromagnetic unloading valve and the speed control valve are in the same pipeline, and this pipeline is connected in parallel with the pipeline where the check valve is located. The check valve is connected to the oil tank through an oil pump and a filter screen. The safety valve is located between the check valve and the oil pump, and the safety valve is connected to the oil tank.

[0007] The platform includes a platform upper panel, trapezoidal reinforcing gussets, square tubes, and L-shaped steels. The square tubes are the core support members of the platform. The platform upper panel is welded to the square tubes, and its extension meets the support width. Trapezoidal reinforcing gussets are arranged at intervals of 200 mm at the bottom of the platform upper panel, and L-shaped steels are used for secondary support at the bottom of the platform to ensure the strength of the platform.

[0008] The oil pump is connected to an electric motor.

[0009] The length of the platform is 2000 mm, the width is 200 mm, the height of the connecting frame is 515 mm, and the height of the column is 2768 mm.

[0010] Both the main oil cylinder and the auxiliary oil cylinder are differential hydraulic cylinders, and the cross-sectional area of the piston rod in the upper chamber of the main oil cylinder is equal to the cross-sectional area of the piston rod in the lower chamber of the auxiliary oil cylinder.

[0011] The present utility model adopts economical and practical materials and manufacturing processes, reduces costs, and has a simple structure, which is easy to maintain and operate. A series-connected differential hydraulic cylinder and a chain are selected as the power unit. While increasing the lifting speed, the height of the lifting machine body is reduced. The hydraulic pipeline passes through the gap under the sleeper and is connected to the other lifting column. Automatic leveling on both sides is achieved through hydraulic series connection. A trapezoidal fixed bracket is designed, and normal lifting can still be carried out within the error range of 100 mm before and after the hopper and 30 mm left and right. Through the trapezoidal fixed bracket and the automatic leveling function, the present utility model significantly improves the efficiency and safety of earthwork handling, adapts to the changing requirements of tunnel construction, and provides reliable technical support for tunnel engineering. Description of the Drawings

[0012] Figure 1 Schematic diagram of the lifting frame structure of the present utility model;

[0013] Figure 2 Schematic diagram of the bracket structure of the present utility model (front view);

[0014] Figure 3 Schematic diagram of the bracket structure of the present utility model (side view);

[0015] Figure 4 Schematic diagram of the hydraulic control system of the present utility model;

[0016] Figure 5 Schematic diagram of the application of the present utility model;

[0017] In the figure: 1, column; 2, bracket; 3, connecting frame; 4, platform; 5, upper panel of the platform; 6, trapezoidal reinforcing gusset; 7, square pipe; 8, L-shaped steel; 9, main oil cylinder; 10, auxiliary oil cylinder; 11, electromagnetic unloading valve; 12, safety valve; 13, check valve; 14, oil pump; 15, motor; 16, speed control valve; 17, filter screen; 18, fuel tank; 19, tunnel; 20, the present utility model; 21, hopper; 22, trolley. Specific embodiments Embodiment

[0018] A lift applicable to an earthwork exchange station in a tunnel, comprising two oppositely arranged lifting frames and its hydraulic control system, as Figure 1 shown, the lifting frame includes a column 1 and a bracket 2 connected to the column 1, as Figures 2 - 3 shown, the bracket 2 includes a trapezoidal connecting frame 3 and a platform 4, the platform 4 is connected to the lower end of the connecting frame 3, and its length is greater than the bottom edge of the connecting frame 3, and the connecting frame 3 is connected to the column 1 in a liftable manner through the hydraulic control system; as Figure 4 shown, the hydraulic control system includes an oil cylinder mechanism, a valve mechanism, and a fuel tank. The oil cylinder mechanism includes a main oil cylinder 9 and an auxiliary oil cylinder 10 connected to each other. The auxiliary oil cylinder 10 is directly connected to the fuel tank 18. The main oil cylinder 9 is connected to the fuel tank 18 through the valve mechanism. The valve mechanism includes an electromagnetic unloading valve 11, a safety valve 12, a check valve 13, and a speed control valve 16. The electromagnetic unloading valve 11 and the speed control valve 16 are in the same pipeline. The pipeline is connected in parallel with the pipeline where the check valve 13 is located. The check valve 13 is connected to the fuel tank 18 through an oil pump 14 and a filter screen 17. The safety valve 12 is located between the check valve 13 and the oil pump 14, and the safety valve 12 is connected to the fuel tank 18.

[0019] The support platform 4 includes a support platform top panel 5, trapezoidal reinforcing gussets 6, square tubes 7, and L-shaped steel 8. The square tubes 7 are the core support members of the support platform. The support platform top panel 5 is welded to the square tubes 7, and its extension meets the support width. Trapezoidal reinforcing gussets 6 are arranged at intervals of 200 mm at the bottom of the support platform top panel 5, and the L-shaped steel 8 is used for secondary support at the bottom of the support platform to ensure the strength of the support platform.

[0020] The oil pump 14 is connected to the motor 15.

[0021] The length of the support platform 4 is 2000 mm, the width is 200 mm, the height of the connecting frame 3 is 515 mm, and the height of the column 1 is 2768 mm.

[0022] Both the main oil cylinder 9 and the auxiliary oil cylinder 10 are differential hydraulic cylinders, and the cross-sectional area of the piston rod in the upper chamber of the main oil cylinder 9 is equal to the cross-sectional area of the piston rod in the lower chamber of the auxiliary oil cylinder 10.

[0023] The utility model is applicable to Figure 5 During the construction of the earthwork exchange station in the tunnel as shown, the hydraulic pipeline passes through the gap under the sleeper and is connected to the column on the other side, and the two sides are automatically leveled through hydraulic series connection. The trapezoidal fixed bracket adopts common steel materials, with a simple structure and low manufacturing cost. Since it is difficult to achieve precise alignment between the hopper and the trolley during tunnel construction, and there are also errors in the trolley's in-station position, using this fixed support platform can be compatible with the hopper to achieve normal lifting within the error range of 100 mm before and after and 30 mm left and right on the track, avoiding the time loss and safety risks brought by manual alignment and significantly improving the efficiency and safety of earthwork handling, and providing a reliable technical guarantee for realizing the automatic in-station exchange of the hopper by the trolley.

[0024] The principle and characteristics of the hydraulic control system: The motor 15 drives the oil pump 14 to inject the hydraulic oil in the fuel tank 18 into the lower chamber of the main oil cylinder 9 through the one-way valve 13. While the main oil cylinder 9 is lifting, the hydraulic oil in the upper chamber is pushed into the lower chamber of the auxiliary oil cylinder 10. By designing the cross-sectional area of the piston rod in the upper chamber of the main oil cylinder 9 to be equal to the cross-sectional area of the piston rod in the lower chamber of the auxiliary oil cylinder 10, the synchronous upward movement of both sides can be achieved through oil pressure. The electromagnetic unloading valve 11 and the speed control valve 16 can manually adjust the lifting speed of the oil cylinder, and the safety valve 12 automatically relieves pressure when the oil pressure is too high to protect the hydraulic system.

[0025] A series-connected differential hydraulic cylinder and a chain are selected as the power unit. While increasing the lifting speed, the height of the lifter body is reduced. The hydraulic pipeline passes through the gap under the sleeper and is connected to the lifting column on the other side, and the two sides are automatically leveled through hydraulic series connection.

Claims

1. A lifting machine suitable for earthwork exchange station in tunnel, characterized in that: The invention comprises two lifting frames arranged opposite to each other and a hydraulic control system thereof, wherein the lifting frames comprise a column and a bracket connected to the column, wherein the bracket comprises a trapezoidal connecting frame and a supporting platform, wherein the supporting platform is connected to the lower end of the connecting frame and has a length greater than the bottom side of the connecting frame, and wherein the connecting frame is liftably connected to the column through a hydraulic control system; wherein the hydraulic control system comprises a cylinder mechanism, a valve mechanism, and an oil tank, wherein the cylinder mechanism comprises a main oil cylinder and a sub-oil cylinder connected to each other, wherein the sub-oil cylinder is directly connected to the oil tank, and wherein the main oil cylinder is connected to the oil tank through a valve mechanism, wherein the valve mechanism comprises an electromagnetic unloading valve, a safety valve, a one-way valve, and a speed regulating valve, wherein the electromagnetic unloading valve and the speed regulating valve are in the same pipeline, wherein the pipeline is connected in parallel with the pipeline where the one-way valve is located, wherein the one-way valve is connected to the oil tank through an oil pump and a filter, wherein the safety valve is located between the one-way valve and the oil pump, and wherein the safety valve is connected to the oil tank.

2. A lifting machine suitable for earthwork exchange station in tunnel according to claim 1, characterized in that: The support platform includes a support platform upper panel, a trapezoidal reinforcing elbow plate, a square tube, and an L-shaped steel. The square tube is the core support component of the support platform. The support platform upper panel is welded to the square tube, which extends out to meet the support width. Trapezoidal reinforcing elbow plates are set at intervals of 200mm at the bottom of the support platform, and L-shaped steel is used for secondary support at the bottom of the support platform.

3. A lifting machine suitable for earthwork exchange station in tunnel according to claim 1, characterized in that: The oil pump is connected to the motor.

4. A lifting machine suitable for earthwork exchange station in tunnel according to any one of claims 1 to 3, characterized in that: The length of the support platform is 2000 mm, the width is 200 mm, the height of the connecting frame is 515 mm, and the height of the column is 2768 mm.

5. A lifting machine suitable for earthwork exchange station in tunnel according to any one of claims 1 to 3, characterized in that: The master cylinder and the auxiliary cylinder are both differential hydraulic cylinders, and the cross-sectional area of ​​the piston rod of the upper chamber of the master cylinder is equal to the cross-sectional area of ​​the piston rod of the lower chamber of the auxiliary cylinder.

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