Excavation rack for tunnel smooth blasting

Abstract

The utility model relates to the technical field of tunnel construction, in particular to an excavation rack for tunnel smooth blasting, which is characterized in that a main working platform is fixed at the upper end of a lifting frame, telescopic extension working platforms are arranged on two sides of the main working platform, and the extension working platforms are arranged close to the front end of the main working platform; a bottom plate is arranged at the lower end of the lifting frame, and moving wheels are arranged on the bottom face of the bottom plate. The lifting frame can drive the main working platform and the extending working platform to ascend and descend, so that the height of the main working platform and the height of the extending working platform are adjusted, and drilling is conducted at different height positions. The extending working platforms are arranged on the two sides of the main working platform, and the extending working platforms are arranged in a telescopic mode, so that the width of the working platform can be adjusted according to the tunnel section width of the height where the working platform is located. According to the utility model, only one stage of working platform is vertically arranged, so that the height and the width can be adjusted, the requirements of tunnel smooth blasting drilling operation can be met, and the safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, and more specifically, particularly relates to an excavation stand for tunnel smooth surface blasting. Background Art

[0002] Smooth blasting is a controlled blasting technology that keeps the new wall surface smooth without obvious damage. Its characteristics are to drill a row of smooth blasting holes on the designed excavation contour line with a hole spacing that matches the minimum resistance line, and use uncoupled charges or other special charge structures. After the main excavation blasting, the charges in the smooth blasting holes are detonated at the same time, thus forming an excavation surface that runs through the smooth blasting holes and is smooth and flat. When actually carrying out smooth blasting, drilling equipment is first used to drill multiple blastholes on the face of the tunnel being constructed, and then charge is charged in each blasthole; after the charging is completed, drilling and blasting construction is carried out.

[0003] If the construction workers need to perform drilling operations at designated locations, an excavation stand is required. The patent with the prior art announcement number CN208236424U discloses an excavation stand for smooth blasting of tunnels, including a frame installed on the upper step surface of the tunnel, a top working platform arranged at the top of the frame, two first working platforms arranged on both sides of the frame, two second working platforms arranged on both sides of the frame and located below the first working platform, two bearing platforms arranged on both sides of the frame and located below the second working platform, and two vertical guide rails respectively fixed on both sides of the frame, which has the characteristics of adjustable frame area, improved tunnel safety factor and workers' comfort during construction. However, the number of working platforms is large, and they are not the same up and down. The staff needs to change positions between each working platform, which is inconvenient to operate and the safety needs to be improved. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0005] An excavation stand for smooth blasting of a tunnel comprises a lifting frame, wherein a main working platform is fixed at the upper end of the lifting frame, retractable extension working platforms are arranged on both sides of the main working platform, and the extension working platforms are arranged close to the front end of the main working platform; a bottom plate is arranged at the lower end of the lifting frame, and movable wheels are arranged on the bottom surface of the bottom plate.

[0006] Furthermore, a punching device is provided at the front end of the upper end of the main working platform and the extended working platform. The punching device can slide along the front end of the main working platform or the extended working platform, and the punching device is slidably and fixedly connected to the main working platform or the extended working platform.

[0007] Furthermore, the upper front ends of the main working platform and the extended working platform are respectively provided with sliding grooves, in which sliding blocks are slidably arranged, and the sliding blocks are provided with supporting devices for installing the punching devices, and the main working platform and the extended working platform are provided with locking devices for fixing the position of the sliding blocks.

[0008] Furthermore, the locking device includes a rack and a pushing component, the slider is a gear, the rack is slidably arranged on the rear side of the slide slot, and the pushing component is used to push the rack to move forward and backward.

[0009] Furthermore, the pushing assembly includes a worm, a worm wheel and a handle, the worm is arranged on the rear side of the rack and is perpendicular to the rack, one end of the worm is threadedly connected to the rack, and the other end is rotatably connected to the main working platform or the extended working platform, the worm wheel is horizontally arranged and meshes with the worm, the handle vertically passes through the axis of the worm wheel and is fixedly connected to the worm wheel, the handle is rotatably connected to the main working platform or the extended working platform, the main working platform and the extended working platform are provided with a cavity for accommodating the worm and the worm wheel, and the upper end of the handle extends above the main working platform or the extended working platform.

[0010] Furthermore, the punching device includes a guide seat, a first motor and a drill bit, the bottom surface of the guide seat is connected to the supporting device, the first motor is fixed to the rear end of the guide seat, the drill bit is arranged at the front end of the guide seat, and the output end of the first motor is transmission-connected to the drill bit.

[0011] Furthermore, the supporting device includes a supporting rod and a guide rail, the supporting rod is fixed on the upper end surface of the sliding block, the guide rail is fixedly connected to the upper end of the supporting rod, a screw rod is rotatably mounted on the guide rail, a sliding seat is threadedly connected to the screw rod, the punching device is mounted on the sliding seat, and a second motor transmission-connected to the screw rod is fixed to the outer side of the guide rail.

[0012] Furthermore, the support rod is a telescopic rod.

[0013] Furthermore, a first fence is provided at the rear end of the main working platform and the rear end top surface of both side edges, a second fence is provided on the side of the extended working platform away from the main working platform, and a retractable third fence is provided at the rear end of the extended working platform.

[0014] Furthermore, a ground rail is laid on the tunnel floor, the moving wheel is a rail wheel, and the rail wheel is adapted to the ground rail.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The excavation gantry for tunnel smooth surface blasting in the utility model can drive the main working platform and the extended working platform to rise and fall, thereby adjusting the height of the main working platform and the extended working platform, and drilling at different heights. By arranging extended working platforms on both sides of the main working platform, and the extended working platforms are retractable, the width of the working platform can be adjusted according to the width of the tunnel section at the height of the working platform. The excavation gantry for tunnel smooth surface blasting in the utility model only needs to set a first-level working platform vertically to meet the height and width adjustment requirements to meet the needs of tunnel smooth surface blasting drilling operations. There is no need to set multiple working platforms vertically, and there is no need for workers to change positions up and down between each working platform, which is safer.

[0017] The excavation platform for smooth blasting of tunnels in the utility model is provided with a punching device at the front end of the upper end of the main working platform and the extended working platform, and the punching device can slide along the front end of the main working platform or the extended working platform, thereby eliminating the need for workers to hold the punching device to perform drilling. On the one hand, the labor intensity of workers is reduced, and on the other hand, the probability of unqualified drilling caused by drilling inclination and the like can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of an excavation stand for smooth blasting of a tunnel in an embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the overall structure of the excavation stand for smooth blasting of a tunnel in an embodiment of the utility model from another perspective.

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 It is a structural schematic diagram of an extended working platform in an embodiment of the utility model.

[0023] Figure 5 It is a schematic structural diagram of the punching device, the supporting device and the locking device in the embodiment of the utility model.

[0024] In the figure: 1. lifting frame; 2. main working platform; 3. extension working platform; 4. bottom plate; 5. moving wheel; 6. punching device; 601. guide seat; 602. first motor; 603. drill bit; 7. slide groove; 8. slider; 9. rack; 10. worm; 11. worm wheel; 12. handle; 13. supporting device; 1301. support rod; 1302. guide rail; 1303. screw rod; 1304. slide seat; 1305. second motor; 14. first fence; 15. second fence; 16. third fence; 17. ground rail. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 , Figure 2 As shown, the excavation stand for smooth blasting of a tunnel in this embodiment includes a lifting frame 1, a main working platform 2 is fixed on the upper end of the lifting frame 1, retractable extension working platforms 3 are arranged on both sides of the main working platform 2, and the extension working platform 3 is arranged near the front end of the main working platform 2; a bottom plate 4 is arranged at the lower end of the lifting frame 1, and moving wheels 5 are arranged on the bottom surface of the bottom plate 4. Specifically, the moving wheels 5 are rail wheels, and ground rails 17 are laid on the tunnel floor, and the rail wheels are adapted to the ground rails 17.

[0027] In this embodiment, the lifting frame 1 is a scissor lift frame 1. By setting the lifting frame 1, the height of the main working platform 2 and the extended working platform 3 can be adjusted. Both sides of the main working platform 2 are provided with a receiving cavity that can partially accommodate the extended working platform 3. The extended working platform 3 is slidably arranged with the receiving cavity, such as Figure 4 As shown, an electric push rod is horizontally arranged inside the accommodating cavity, the fixed end of the electric push rod is fixed in the accommodating cavity, and the telescopic end of the electric push rod is connected to the extended working platform 3, so that the extension and retraction of the electric push rod drives the extended working platform 3 to extend or retract, thereby adjusting the overall width of the working platform. Preferably, a limiting groove is provided at the bottom of the accommodating cavity, and a limiting slide bar adapted to the limiting groove is fixed to the bottom surface of the extended working platform 3.

[0028] The excavation rig used for tunnel smooth surface blasting in this embodiment adopts a vertical single working platform, and the height and width of the working platform can be adjusted to meet the needs of tunnel smooth surface blasting drilling operations. There is no need to set up multiple working platforms vertically, and there is no need for workers to change positions up and down between each working platform, which is safer.

[0029] In this embodiment, a first fence 14 is provided on the top surface of the rear end of the main working platform 2 and the rear ends of both side edges, a second fence 15 is provided on the side of the extended working platform 3 away from the main working platform 2, and a retractable third fence 16 is provided on the rear end of the extended working platform 3, thereby further improving safety.

[0030] In this embodiment, if Figure 3 , Figure 5 As shown, a punching device 6 is provided at the front end of the upper end of the main working platform 2 and the extended working platform 3. The punching device 6 can slide along the front end of the main working platform 2 or the extended working platform 3, and the punching device 6 is slidably and fixedly connected to the main working platform 2 or the extended working platform 3.

[0031] Specifically, a slide groove 7 is respectively provided at the front end of the upper end surface of the main working platform 2 and the extended working platform 3, a slider 8 is slidably arranged in the slide groove 7, a supporting device 13 for installing the punching device 6 is provided on the slider 8, and a locking device for fixing the position of the slider 8 is provided on the main working platform 2 and the extended working platform 3.

[0032] The locking device includes a rack 9 and a pushing assembly. The slider 8 is a gear. The rack 9 is slidably arranged at the rear side of the slide slot 7. The pushing assembly is used to push the rack 9 to move forward and backward. The pushing assembly includes a worm 10, a worm wheel 11 and a handle 12. The worm 10 is arranged at the rear side of the rack 9 and is perpendicular to the rack 9. One end of the worm 10 is threadedly connected to the rack 9, and the other end is rotatably connected to the main working platform 2 or the extended working platform 3. The worm wheel 11 is horizontally arranged and meshed with the worm 10. The handle 12 vertically penetrates the axis of the worm wheel 11 and is fixedly connected to the worm wheel 11. The lower end of the handle 12 is rotatably connected to the main working platform 2 or the extended working platform 3. The main working platform 2 and the extended working platform 3 are provided with cavities for accommodating the worm 10 and the worm wheel 11. The upper end of the handle 12 extends to the top of the main working platform 2 or the extended working platform 3. The worm wheel is driven to rotate by the hand crank 12, and the rotation of the worm wheel drives the worm 10 to rotate. Since the worm 10 is threadedly connected to the rack 9, the rotation of the worm 10 drives the rack 9 to slide in a direction close to and away from the slider 8, thereby fixing the position of the slider 8 or unlocking the slider 8.

[0033] The punching device 6 includes a guide seat 601, a first motor 602 and a drill bit 603. The bottom surface of the guide seat 601 is connected to the supporting device 13, the first motor 602 is fixed to the rear end of the guide seat 601, the drill bit 603 is arranged at the front end of the guide seat 601, and the output end of the first motor 602 is transmission-connected to the drill bit 603.

[0034] The support device 13 includes a support rod 1301 and a guide rail 1302. The support rod 1301 is fixed on the upper end surface of the slider 8. The guide rail 1302 is fixedly connected to the upper end of the support rod 1301. A screw rod 1303 is rotatably mounted on the guide rail 1302. A slide seat 1304 is threadedly connected to the screw rod 1303. The guide seat 601 is mounted on the slide seat 1304. A second motor 1305 is fixed on the outer side of the guide rail 1302 and is transmission-connected to the screw rod 1303. In some other embodiments, the support rod 1301 can be a telescopic rod, such as a hydraulic cylinder, an electric telescopic rod, etc., so that the height of the punching device 6 can be adjusted separately.

[0035] The working principle of the excavation stand for tunnel smooth blasting in this embodiment is:

[0036] The lifting frame 1 can drive the main working platform 2 and the extended working platform 3 to rise and fall, thereby adjusting the height of the main working platform 2 and the extended working platform 3, and drilling at different heights. By arranging the extended working platform 3 on both sides of the main working platform 2, and the extended working platform 3 can be retracted, the width of the working platform can be adjusted according to the width of the tunnel section at the height of the working platform. The excavation stand for tunnel smooth blasting in the utility model only needs to set a first-level working platform vertically to meet the height and width adjustment requirements to meet the needs of tunnel smooth blasting drilling operations. There is no need to set multiple working platforms vertically, and there is no need for workers to change positions up and down between each working platform, which is safer.

[0037] A punching device 6 is arranged at the front end of the upper end of the main working platform 2 and the extended working platform 3, and the punching device 6 can slide along the front end of the main working platform 2 or the extended working platform 3, thereby eliminating the need for workers to hold the punching device 6 to perform drilling. On the one hand, it reduces the labor intensity of workers, and on the other hand, it can reduce the probability of unqualified drilling caused by drilling inclination and other unqualified conditions caused by manual operation.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An excavation stand for smooth blasting of a tunnel, characterized in that: include: Lifting frame (1); A main working platform (2) arranged at the upper end of the lifting frame (1); An extended working platform (3) is retractably arranged on both sides of the main working platform (2), and the extended working platform (3) is arranged close to the front end of the main working platform (2); A bottom plate (4) arranged at the lower end of the lifting frame (1); A moving wheel (5) is arranged on the bottom surface of the bottom plate (4).

2. The excavation stand for tunnel smooth blasting according to claim 1, characterized in that: The front ends of the upper ends of the main working platform (2) and the extended working platform (3) are both provided with punching devices (6), and the punching devices (6) can slide along the front ends of the main working platform (2) or the extended working platform (3), and the punching devices (6) are slidably and fixedly connected to the main working platform (2) or the extended working platform (3).

3. The excavation stand for tunnel smooth blasting according to claim 2, characterized in that: The front ends of the upper end faces of the main working platform (2) and the extended working platform (3) are respectively provided with sliding grooves (7), a slider (8) is slidably arranged in the sliding groove (7), a supporting device (13) for installing the punching device (6) is arranged on the slider (8), and a locking device for fixing the position of the slider (8) is arranged on the main working platform (2) and the extended working platform (3).

4. The excavation stand for tunnel smooth blasting according to claim 3, characterized in that: The locking device comprises a rack (9) and a pushing assembly, the slider (8) is a gear, the rack (9) is slidably arranged on the rear side of the slide groove (7), and the pushing assembly is used to push the rack (9) to move forward and backward.

5. The excavation stand for tunnel smooth blasting according to claim 4, characterized in that: The pushing assembly comprises a worm (10), a worm wheel (11) and a handle (12); the worm (10) is arranged at the rear side of the rack (9) and is perpendicular to the rack (9); one end of the worm (10) is threadedly connected to the rack (9), and the other end is rotatably connected to the main working platform (2) or the extended working platform (3); the worm wheel (11) is horizontally arranged and meshed with the worm (10); the handle (12) vertically penetrates the axis of the worm wheel (11) and is fixedly connected to the worm wheel (11); the handle (12) is rotatably connected to the main working platform (2) or the extended working platform (3); the main working platform (2) and the extended working platform (3) are provided with cavities for accommodating the worm (10) and the worm wheel (11); the upper end of the handle (12) extends above the main working platform (2) or the extended working platform (3).

6. The excavation stand for tunnel smooth blasting according to claim 3, characterized in that: The punching device (6) comprises a guide seat (601), a first motor (602) and a drill bit (603); the bottom surface of the guide seat (601) is connected to the support device (13); the first motor (602) is fixed to the rear end of the guide seat (601); the drill bit (603) is arranged at the front end of the guide seat (601); and the output end of the first motor (602) is transmission-connected to the drill bit (603).

7. The excavation stand for tunnel smooth blasting according to claim 3, characterized in that: The support device (13) comprises a support rod (1301) and a guide rail (1302), wherein the support rod (1301) is fixed on the upper end surface of the slider (8), and the guide rail (1302) is fixedly connected to the upper end of the support rod (1301), a screw rod (1303) is rotatably mounted on the guide rail (1302), a slide seat (1304) is threadedly connected to the screw rod (1303), the punching device (6) is mounted on the slide seat (1304), and a second motor (1305) drivingly connected to the screw rod (1303) is fixed on the outer side of the guide rail (1302).

8. The excavation stand for tunnel smooth blasting according to claim 7, characterized in that: The support rod (1301) is a telescopic rod.

9. The excavation stand for tunnel smooth blasting according to claim 5, characterized in that: A first fence (14) is provided at the rear end of the main working platform (2) and at the rear end top surface of both side edges, a second fence (15) is provided at the side of the extended working platform (3) away from the main working platform (2), and a retractable third fence (16) is provided at the rear end of the extended working platform (3).

10. The excavation stand for tunnel smooth blasting according to claim 5, characterized in that: A ground rail (17) is laid on the tunnel floor, the moving wheel (5) is a rail wheel, and the rail wheel is compatible with the ground rail (17).

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