Tunnel variable section excavation trolley

Abstract

The invention relates to the field of trolleys, in particular to a tunnel variable-section excavation trolley which comprises a movable frame, a movable support, a plurality of supporting rods, a plurality of supporting rods, a plurality of supporting rods, a plurality of supporting rods and a plurality of supporting rods. The movable frame is arranged on the top of the movable frame in a sliding mode in the front-back direction. The mounting plate is arranged on the rear side of the top of the movable frame, and a telescopic device for driving the movable frame to move is horizontally arranged on the mounting plate; the inhaul cable frame is rotationally arranged on the rear side of the top of the movable frame, multiple upper guide wheels are arranged on the top of the inhaul cable frame, and a straightening mechanism is arranged at the bottom of the rear side of the movable frame; one end of the reinforced inhaul cable is connected with the front end of the movable frame, and the other end bypasses the upper guide wheel to be connected with the straightening mechanism; and the balancing weight is slidably arranged at the top of the moving frame. According to the excavation trolley, after the movable frame extends forwards, additional support is provided for the movable frame through the reinforcing inhaul cable, the balancing weight is driven by the pull rope to move backwards, the gravity center of the whole excavation trolley is adjusted, in addition, when the movable frame extends forwards to the maximum distance, the U-shaped plate can be propped through the bottom supporting plate, and the safety performance is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of trolleys, and in particular to a tunnel excavation trolley with a variable cross-section. Background Art

[0002] The tunnel excavation trolley is a specialized equipment designed for tunnel excavation. It is primarily used for drilling, charging, and blasting operations during drill and blast construction. It mainly consists of a top operating platform and a side operating platform.

[0003] A Chinese patent with announcement number CN109236302B discloses a tunnel variable-section excavation trolley. By adopting an upper and lower sliding structure of the trolley body and the movable frame, the upper movable frame can be extended and retracted longitudinally, which can realize the rapid conversion of full-section and two-step excavation construction methods; a rack is provided on the lower trolley body, and a drive motor is provided on the upper movable frame, and a gear is installed on the drive motor. The movable frame is driven by the gear rack to perform longitudinal extension and retraction movement, which is more stable and durable than other driving methods.

[0004] However, the above-mentioned publicly disclosed solution has the following shortcomings: after the upper movable frame is extended forward, most of it is in a suspended state. When extended forward to the maximum distance, the extended support frame only provides support at the rear end connection, and the overall stability is poor. The extended support frame also has the risk of damage when overloaded, posing certain safety hazards. Summary of the Invention

[0005] The present invention aims to address the problems in the background art that the upper movable frame has poor stability after being extended forward and is easily damaged when overloaded, and to propose a tunnel variable-section excavation trolley.

[0006] The technical solution of the present invention is a tunnel variable cross-section excavation trolley, comprising a movable frame, which is a U-shaped frame with a U-shaped opening facing downward; and further comprising: The movable frame is slidably arranged on the top of the movable frame in the front-to-back direction, and a U-shaped plate is arranged on the bottom of the movable frame in the front-to-back direction, and the horizontal section of the bottom of the U-shaped plate is located below the top frame of the movable frame; The mounting plate is arranged on the rear side of the top of the movable frame, and a telescopic device for driving the movable frame to move is horizontally arranged on the mounting plate; The cable frame is rotatably arranged at the rear side of the top of the mobile frame, the movable frame extends forward, the cable frame is rotated to a vertical state, a plurality of upper guide wheels are arranged on the top of the cable frame, and a straightening mechanism is arranged at the bottom of the rear side of the mobile frame; The reinforcing cable has one end connected to the front end of the movable frame and the other end passing around the upper guide wheel and connected to the straightening mechanism; and a counterweight block which is slidably arranged on the top of the movable frame, and the counterweight block and the movable frame move synchronously in opposite directions.

[0007] Preferably, a plurality of wheel sets are provided at the bottom of the mobile frame, and a plurality of side operating frames are provided side by side on both sides of the mobile frame.

[0008] Preferably, the cable rack includes a fixed plate arranged on the top rear side of the movable rack, a rotating shaft longitudinally and rotationally arranged on the fixed plate, support frames arranged at both ends of the rotating shaft, and a vertical plate arranged at the bottom of the rotating shaft.

[0009] Preferably, the straightening mechanism includes a lower guide wheel arranged at the bottom of the rear end of the mobile frame, a slide arranged on the mobile frame for sliding in the vertical direction, a lifting device arranged vertically on the mobile frame, and a state adjustment plate arranged on the top of the slide; the reinforced cable changes its direction after passing through the lower guide wheel and is connected to the slide upward, the state adjustment plate pushes the cable frame upward to a vertical state, and the top of the lifting device is connected to the slide.

[0010] Preferably, a lower limit plate is provided on the top of the lifting device, a connecting column is provided on the lower limit plate, a through hole for the connecting column to pass through is provided on the slide plate, an upper limit plate is provided on the top of the connecting column, and a pressure sensor is provided on the lower limit plate.

[0011] Preferably, multiple slide rails are arranged on the mounting plate in the front-to-back direction, a slide groove for the slide rails to pass through is provided on the counterweight block, a pull rope is provided at the front end of the movable frame, two pull rope holes are provided side by side on the mounting plate, the rear end of the pull rope passes through the two pull rope holes and is connected to the counterweight block, a spring mounting seat is provided at the top front end of the movable frame, a spring is provided on the spring mounting seat, and the end of the spring is connected to the counterweight block.

[0012] Preferably, the telescopic rod of the telescopic device is located below the working platform of the movable frame, and the spring is located directly below the slide rail.

[0013] Preferably, connecting frames are provided on both sides of the left and right sides at the middle height position of the front end of the movable frame, and connecting plates are rotatably provided on the connecting frames. Bottom support plates are provided on the top of the two connecting plates, and the bottom support plates are against the bottom of the U-shaped plate from below. A connecting cable is provided at the upper part of the connecting plate at the rotation position, and the other end of the connecting cable is connected to the counterweight block, and the connecting cable is in a tensioned state.

[0014] Compared with the existing technology, the present invention has the following beneficial technical effects: after the movable frame is extended forward, the reinforced cable provides additional support for the movable frame. At the same time, when the movable frame is extended forward, the cable drives the counterweight to move backward, adjusting the center of gravity of the entire excavation trolley so that the center of gravity is as close to the middle position of the trolley as possible, further improving overall stability. In addition, when the movable frame is extended forward to its maximum distance, the counterweight moves backward, pulling the connecting cable to flip the connecting plate and bottom support plate upward, so that the bottom support plate presses against the U-shaped plate from below, further supporting the movable frame and improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A schematic structural diagram of an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure from another perspective; Figure 3 for Figure 1 Schematic diagram of the structure after removing the mobile rack; Figure 4 for Figure 3 Schematic diagram of part of the structure; Figure 5 for Figure 2 A is an enlarged schematic diagram.

[0016] Figure numerals: 1. Mobile frame; 2. Wheel set; 3. Movable frame; 4. Side operating frame; 5. U-shaped plate; 6. Lifting platform; 7. Fixed plate; 8. Rotating shaft; 9. Vertical plate; 10. Support frame; 11. Upper guide wheel; 12. Lower guide wheel; 13. Reinforced cable; 14. Cable connecting seat; 15. Slide plate; 16. Guide rod; 17. Lifting device; 18. Lower limit plate; 19. Upper limit plate; 20. State adjustment plate; 21. Mounting plate; 22. Telescopic device; 23. Pull rope; 24. Counterweight; 25. Slide rail; 26. Spring mounting seat; 27. Spring; 28. Connecting frame; 29. ​​Connecting plate; 30. Bottom support plate; 31. Connecting cable. DETAILED DESCRIPTION

[0017] Embodiment 1: The present invention proposes a tunnel excavation trolley with a variable cross-section.

[0018] like Figure 1 As shown, it includes a mobile frame 1, which is a U-shaped frame with a U-shaped opening facing downward. A plurality of wheel sets 2 are provided at the bottom of the mobile frame 1, and a plurality of side operating frames 4 are provided side by side on both sides of the mobile frame 1; in addition, side operating frames 4 are also provided on both sides of the movable frame 3, and the lowermost side operating frame 4 on the mobile frame 1 extends outward the longest. A plurality of ladders are provided on the mobile frame 1 for operators to climb onto the side operating frames 4 and the movable frame 3. In order to improve the safety of the operation, railings are provided on the edges of the side operating frames 4 as needed; a lifting platform 6 is provided on the movable frame 3, which can transport operators upward to perform various operations on the inner wall of the tunnel; and further includes: The movable frame 3 is slidably arranged on the top of the movable frame 1 along the front-back direction, and a U-shaped plate 5 is arranged at the bottom of the movable frame 3 along the front-back direction, and the horizontal section of the bottom of the U-shaped plate 5 is located below the top frame of the movable frame 1; Figure 1 As shown; The mounting plate 21 is arranged on the rear side of the top of the mobile frame 1. A telescopic device 22 for driving the movable frame 3 to move is arranged horizontally on the mounting plate 21. Because the movable frame 3 is heavy and the weight is even greater when there are multiple operators, the telescopic device 22 adopts a hydraulic cylinder for higher stability. Figure 3 As shown; The cable frame is rotatably arranged at the rear side of the top of the mobile frame 1, the movable frame 3 extends forward, the cable frame is rotated to a vertical state, a plurality of upper guide wheels 11 are arranged on the top of the cable frame, and a straightening mechanism is arranged at the bottom of the rear side of the mobile frame 1; Figure 1 As shown; One end of the reinforcing cable 13 is connected to the cable connecting seat 14 provided at the front end of the movable frame 3, and the other end is connected to the straightening mechanism by passing through the upper guide wheel 11. The reinforcing cable 13 is straightened by the straightening mechanism. In this embodiment, a total of four reinforcing cables 13 are provided, and they are arranged in groups of two, and the two groups are respectively located on the left and right sides of the movable frame 3. Figure 1 As shown; And the counterweight block 24 is slidably arranged on the top of the mobile frame 1, and the counterweight block 24 and the movable frame 3 move synchronously in opposite directions; In addition, a control system is set on the mobile frame 1, and the control system is controlled and connected with the telescopic device 22 and the straightening mechanism; Figure 4 shown.

[0019] The second embodiment of the present invention provides a tunnel excavation trolley with a variable cross-section. Compared with the first embodiment, this embodiment introduces the structure of the cable rack and the straightening mechanism in detail.

[0020] like Figure 1 As shown, the cable frame includes a fixed plate 7 arranged on the top rear side of the mobile frame 1, a rotating shaft 8 longitudinally and rotationally arranged on the fixed plate 7, a support frame 10 arranged at both ends of the rotating shaft 8, and a vertical plate 9 arranged at the bottom of the rotating shaft 8; in this embodiment, two upper guide wheels 11 are fixedly arranged at both ends of the top of the support frame 10, and a guide groove is provided on the upper guide wheel 11, and the reinforced cable 13 passes through the guide groove. It should be noted that the upper guide wheel 11 cannot rotate and needs to be fixedly connected to the support frame 10.

[0021] like Figure 1-Figure 2 As shown, the straightening mechanism includes a lower guide wheel 12 arranged at the bottom of the rear end of the mobile frame 1, a slide plate 15 arranged on the mobile frame 1 for sliding in the vertical direction, a lifting device 17 vertically arranged on the mobile frame 1, and a state adjustment plate 20 arranged on the top of the slide plate 15; the reinforcing cable 13 changes its direction after passing through the lower guide wheel 12 and is connected to the slide plate 15 upward, and the state adjustment plate 20 pushes the cable frame upward to a vertical state. When the movable frame 3 is not extended forward, the cable frame rotates downward and falls on the movable frame 3 to reduce the occupied space. The top of the lifting device 17 is connected to the slide plate 15, and the lifting device 17 is a multi-stage hydraulic cylinder; the upper guide wheel 11 and the lower guide wheel 12 are both fixedly arranged, and both have guide grooves thereon. The reinforcing cable 13 passes through the guide groove to prevent the reinforcing cable 13 from slipping off the upper guide wheel 11 and the lower guide wheel 12; a plurality of guide rods 16 are vertically arranged at the top of the rear side of the mobile frame 1, and a guide hole for the guide rods 16 to pass through is provided on the slide plate 15.

[0022] like Figure 5 As shown, further, a lower limit plate 18 is provided on the top of the lifting device 17, a connecting column is provided on the lower limit plate 18, a through hole for the connecting column to pass through is provided on the slide plate 15, an upper limit plate 19 is provided on the top of the connecting column, and a pressure sensor is provided on the lower limit plate 18. The control system is connected to the lifting device 17 control and is connected to the pressure sensor signal transmission. The pressure value feedback of the pressure sensor is used to ensure the straightening force of the reinforced cable 13. No matter how much the movable frame 3 extends forward, the reinforced cable 13 can be effectively tensioned, thereby ensuring the supporting strength of the movable frame 3.

[0023] The third embodiment is a tunnel excavation trolley with a variable cross-section proposed by the present invention. Compared with the second embodiment, this embodiment introduces the supporting structure at the bottom of the movable frame 3 in detail.

[0024] like Figure 3-Figure 4 As shown, multiple slide rails 25 are provided on the mounting plate 21 in the front-to-back direction, and a slide groove for the slide rails 25 is provided on the counterweight 24. A pull rope 23 is provided at the front end of the movable frame 3, and two pull rope holes are provided side by side on the mounting plate 21. The rear end of the pull rope 23 passes through the two pull rope holes and is connected to the counterweight 24. A spring mounting seat 26 is provided at the front end of the top of the movable frame 1, and a spring 27 is provided on the spring mounting seat 26. The end of the spring 27 is connected to the counterweight 24. When the movable frame 3 moves forward, the pull rope 23 drives the counterweight 24 backward, thereby adjusting the center of gravity of the entire excavation trolley and improving its overall stability. To prevent slurry falling from the inner wall of the tunnel from damaging the electrical equipment, the telescopic rod of the telescopic device 22 is located below the working platform of the movable frame 3, and the spring 27 is located directly below the slide rail 25.

[0025] like Figure 1 and Figure 3 As shown, connecting frames 28 are provided on both sides of the middle height position at the front end of the movable frame 1, and connecting plates 29 are rotatably provided on the connecting frames 28. Bottom support plates 30 are provided on the top of the two connecting plates 29, and the bottom support plates 30 are against the bottom of the U-shaped plate 5 from below. A connecting cable 31 is provided at the upper part of the connecting plate 29 at the rotation position, and the other end of the connecting cable 31 is connected to the counterweight block 24, and the connecting cable 31 is in a tensioned state; it should be noted that only when the movable frame 3 moves forward to the maximum extent, the bottom support plate 30 will be pulled to the angle of supporting the U-shaped plate 5, and the second support method is provided by the bottom support plate 30. When the movable frame 3 moves forward to other positions, the first support method is provided by the reinforced cable 13, and the center of gravity is adjusted in conjunction with the counterweight block 24.

[0026] In summary, when the present invention is in use, the telescopic device 22 pushes the movable frame 3 forward to adapt to different sections in the tunnel. When the movable frame 3 is not extended forward, the lifting device 17 is in a retracted state, and the cable frame falls on the movable frame 3. After the movable frame 3 is extended forward, the lifting device 17 extends upward, pushing the slide 15 to move upward, first pushing the cable frame upward through the state adjustment plate 20, and then tightening the reinforced cable 13 through the upward movement of the slide 15. The length of the lifting device 17 extending upward can be controlled by the pressure feedback value of the pressure sensor, and the reinforced cable 13 provides additional support for the movable frame 3. At the same time, when the movable frame 3 is extended forward, the counterweight block 24 is driven to move backward through the pull rope 23, adjusting the center of gravity of the entire excavation trolley so that the center of gravity is as close as possible to the middle position of the trolley, further improving the overall stability. When the movable frame 3 is extended forward to the maximum distance, the counterweight block 24 can also move backward to pull the connecting plate 29 and the bottom support plate 30 upward through the connecting rope 31, so that the bottom support plate 30 can be pressed against the U-shaped plate 5 from below, further providing support for the movable frame 3, thereby ensuring that the movable frame 3 extended forward will not be damaged after bearing a large load, and the safety performance is higher.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A tunnel excavation trolley with a variable cross-section, comprising a movable frame (1), which is a U-shaped frame with a U-shaped opening facing downward; characterized in that: Also includes: A movable frame (3) is slidably arranged on the top of the movable frame (1) along the front-back direction, a U-shaped plate (5) is arranged at the bottom of the movable frame (3) along the front-back direction, and a horizontal section of the bottom of the U-shaped plate (5) is located below the top frame of the movable frame (1); A mounting plate (21) is arranged on the rear side of the top of the movable frame (1), and a telescopic device (22) for driving the movable frame (3) to move is horizontally arranged on the mounting plate (21); A cable frame is rotatably arranged at the rear side of the top of the mobile frame (1), the movable frame (3) extends forward, the cable frame is rotated to a vertical state, a plurality of upper guide wheels (11) are arranged on the top of the cable frame, and a straightening mechanism is arranged at the bottom of the rear side of the mobile frame (1); A reinforcing cable (13), one end of which is connected to the front end of the movable frame (3), and the other end of which is passed around the upper guide wheel (11) and connected to the straightening mechanism; And a counterweight block (24) is slidably arranged on the top of the movable frame (1), and the counterweight block (24) and the movable frame (3) move synchronously in opposite directions.

2. The variable cross-section tunnel excavation trolley according to claim 1, characterized in that: A plurality of wheel sets (2) are arranged at the bottom of the mobile frame (1), and a plurality of side operating frames (4) are arranged side by side on both sides of the mobile frame (1).

3. The variable cross-section tunnel excavation trolley according to claim 1, characterized in that: The cable rack comprises a fixed plate (7) arranged on the rear side of the top of the mobile rack (1), a rotating shaft (8) arranged longitudinally and rotationally on the fixed plate (7), support frames (10) arranged at both ends of the rotating shaft (8), and a vertical plate (9) arranged at the bottom of the rotating shaft (8).

4. The variable cross-section tunnel excavation trolley according to claim 1, characterized in that: The straightening mechanism comprises a lower guide wheel (12) arranged at the bottom of the rear end of the mobile frame (1), a slide plate (15) arranged on the mobile frame (1) for sliding along the vertical direction, a lifting device (17) vertically arranged on the mobile frame (1), and a state adjustment plate (20) arranged on the top of the slide plate (15); the reinforcing cable (13) changes its direction after passing through the lower guide wheel (12) and is connected to the slide plate (15) upward, the state adjustment plate (20) pushes the cable frame upward to a vertical state, and the top of the lifting device (17) is connected to the slide plate (15).

5. The variable cross-section tunnel excavation trolley according to claim 4, characterized in that: A lower limit plate (18) is provided on the top of the lifting device (17), a connecting column is provided on the lower limit plate (18), a through hole for the connecting column to pass through is provided on the slide plate (15), an upper limit plate (19) is provided on the top of the connecting column, and a pressure sensor is provided on the lower limit plate (18).

6. The variable cross-section tunnel excavation trolley according to claim 1, characterized in that: A plurality of slide rails (25) are provided on the mounting plate (21) along the front-to-back direction, a slide groove for the slide rails (25) to pass through is provided on the counterweight (24), a pull rope (23) is provided at the front end of the movable frame (3), two pull rope holes are provided side by side on the mounting plate (21), the rear end of the pull rope (23) passes through the two pull rope holes and is connected to the counterweight (24), a spring mounting seat (26) is provided at the front end of the top of the movable frame (1), a spring (27) is provided on the spring mounting seat (26), and the end of the spring (27) is connected to the counterweight (24).

7. The variable cross-section tunnel excavation trolley according to claim 6, characterized in that: The telescopic rod of the telescopic device (22) is located below the working platform of the movable frame (3), and the spring (27) is located directly below the slide rail (25).

8. The variable cross-section tunnel excavation trolley according to claim 1, characterized in that: A connecting frame (28) is provided on both sides of the left and right sides at the middle height position of the front end of the mobile frame (1), a connecting plate (29) is rotatably provided on the connecting frame (28), a bottom support plate (30) is provided on the top of the two connecting plates (29), the bottom support plate (30) is against the bottom of the U-shaped plate (5) from below, a connecting cable (31) is provided at the upper part of the connecting plate (29) at the rotation position, the other end of the connecting cable (31) is connected to the counterweight block (24), and the connecting cable (31) is in a tensioned state.

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