Tunnel construction trolley with variable height

Abstract

The utility model discloses a height-variable tunnel construction trolley which comprises a trolley body arranged on a trolley chassis or provided with a chassis structure, side wing operation platforms are arranged on the two sides of the trolley body, and a top operation platform is arranged on the trolley body. And a top platform lifting oil cylinder for driving the top operation platform is arranged between the top operation platform and the trolley main body. Preferably, the top operation platform is arranged on the telescopic rack, and the trolley is further provided with an arch frame lifting device. The trolley has the advantages that the top operation platform is arranged to be of a liftable structure, so that the operation height of the trolley is of an adjustable structure, and the working face height change requirement for tunnel height change or operation mode change is met; meanwhile, by arranging the telescopic rack and the fixed platform, the trolley has the function of switching the full-section construction mode and the micro-step construction mode, and the fixed platform can also be used for assembling an arch frame under the condition that an arch frame hoisting device is used for hoisting arch frame scattered pieces, so that the multifunctional trolley is formed.

Description

Technical Field

[0001] The utility model relates to a tunnel operation trolley, in particular to a tunnel construction trolley with variable height. Background Art

[0002] In the super-long tunnels of mountain railways, there are changes in the surrounding rock grade based on geological conditions, which usually lead to changes in the tunnel design height, such as small tunnel section height when the surrounding rock properties are good, and high tunnel section height when the surrounding rock properties are poor. When using a fixed-height trolley for construction, a trolley that meets the requirements for large section height will cause a safety hazard of the construction workers' heads touching the tunnel vault in the construction section where the section height is reduced in the good surrounding rock grade. In addition, in the construction section with poor surrounding rock properties, the invert and the face may be excavated simultaneously, and in the construction section with good surrounding rock properties, only the face excavation method is used. The existing fixed-height trolley is also difficult to meet the requirements of alternating construction of the two construction processes. For this reason, it is necessary to improve the existing fixed-height trolley to meet the construction requirements of tunnels with changing construction heights. Summary of the invention

[0003] The purpose of the utility model is to provide a tunnel construction trolley with variable height to address the defect of the existing tunnel construction trolley with fixed height. By setting the top working platform as a liftable structure, the working height of the trolley can be adjusted to meet the requirements of changing the working surface height due to changes in tunnel height or changes in working mode.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0005] A tunnel construction trolley with variable height comprises a trolley main body arranged on a trolley chassis or having a chassis structure, side working platforms are arranged on both sides of the trolley main body, and a top working platform is arranged on the trolley main body; a top platform lifting cylinder for driving the top working platform is arranged between the top working platform and the trolley main body.

[0006] The utility model adopting the above scheme, by setting the top working platform into a liftable structure, makes the working height of the trolley into an adjustable structure, so as to meet the requirements of the working face height change due to the change of tunnel height or the change of working mode. It is particularly suitable for construction parties who need to switch between the excavation of the face and the excavation of the invert and the face at the same time, or the change of the surrounding rock properties leads to the change of the tunnel section height, resulting in the safety hazard of the construction personnel's head bumping during normal activities.

[0007] Preferably, the top working platform includes a middle platform and a side platform, and the middle platform and the side platform are rigidly connected. The side platform also constitutes a part of the side wing platform, so that a part of the side wing platform can be raised and lowered with the middle platform to meet the construction needs after the lifting and lowering.

[0008] Preferably, the top working platform is also provided with two parallel first lifting longitudinal beams, which are driven to rise and fall by the first longitudinal beam lifting oil cylinder; a first rail vehicle-type transport trolley is provided on the first lifting longitudinal beam, so that the trolley has the function of assisting the arch frame installation, which can effectively save construction costs compared with professional arch frame installation equipment, and can reduce labor intensity by lifting the arch frame with the help of the oil cylinder.

[0009] Preferably, the trolley body includes a fixed platform and a telescopic platform, the telescopic platform is driven by a platform telescopic drive cylinder to telescope, and at least two cylinder legs are provided at the front end of the telescopic platform; the top working platform is mounted on the telescopic platform, and upper side platforms are provided on both sides of the telescopic platform. With the help of the telescopic platform, the top working platform can be extended in front of the trolley body and supported on the steps of the face by the cylinder legs, so that the trolley has the function of switching between the full-section and micro-step construction modes.

[0010] Further preferably, the fixed platform is located at one end of the trolley near the tunnel entrance, and an arch frame lifting device and two parallel second lifting longitudinal beams are provided on the fixed platform. A second longitudinal beam lifting oil cylinder is connected between the second lifting longitudinal beam and the trolley body, and a rail vehicle-type second transport trolley is provided on the second lifting longitudinal beam. The arch frame pieces can be used for lifting, and the fixed platform part can be used for arch frame assembly. The assembled arch frame can be lifted by the second longitudinal beam lifting oil cylinder and loaded onto the first transport trolley by the second transport trolley, so as to avoid the arch frame being assembled on the tunnel ground and affecting the normal passage function of the passage, which is particularly suitable for the arch frame installation method of on-site assembly.

[0011] Preferably, an intermediate bracket is provided between the telescopic platform and the trolley body, the intermediate bracket is longitudinally and telescopically connected to the trolley body, and is driven to telescopically move by a bracket oil cylinder; two sets of supporting rollers are provided at the front end of the intermediate bracket, and the supporting rollers support the telescopic platform. The intermediate bracket can be used to increase the extension distance of the telescopic platform and the top working platform, and support the telescopic platform, thereby enhancing the structural strength of the extended part.

[0012] More preferably, the middle bracket is a door frame-shaped structure arranged horizontally; the supporting roller is arranged on the side of the door column; the trolley body is formed with a window for two door columns to pass through, and the door column is formed by two parallel H-shaped steels. The window is used to form a limit for the middle bracket in a cantilevered state to prevent the front end from falling and tilting; the two parallel H-shaped steels can effectively enhance the bending resistance of the middle bracket and ensure the construction safety under the micro-step construction state.

[0013] Further preferably, the telescopic platform is provided with two platform longitudinal beams supported on the supporting rollers, the platform longitudinal beams are formed by two parallel H-shaped steels, the two platform longitudinal beams are fixedly connected together by a plurality of platform cross beams arranged in parallel and located above the platform longitudinal beams, the two ends of the platform cross beams are fixedly connected with platform column feet, and the inner side of the platform column feet on the same side is fixedly connected with a limit bar; the limit bar is located on the outside of the window frame of the window. When the telescopic platform is in the extended state, the rear part of the platform column feet is supported on the trolley body, and the front end is supported on the steps of the palm face by the cylinder legs, so as to ensure that the telescopic platform has a reliable support structure in the extended state; at the same time, the limit bars arranged symmetrically on the left and right and located on the outside of the corresponding window frame can effectively prevent the telescopic platform from tilting, and further enhance the stability of the telescopic platform in the extended state.

[0014] Preferably, the trolley body is arranged on a trolley chassis, and the trolley chassis is composed of two independently arranged road vehicle chassis with a power system and a travel system, so as to make full use of existing technologies, save development costs, and form a series of products with characteristics. Among them, the road vehicle chassis adopts the same structure as the existing chassis disclosed in CN219953348U.

[0015] Preferably, each platform constituting the side wing working platform is provided with a side push bar driven by a side push cylinder, and the side push bar is arranged longitudinally along the trolley. When the arch frame is in place, the side push bar is used to push the arch frame toward the tunnel side wall, which can reduce manpower pushing and reduce labor intensity.

[0016] The beneficial effect of the utility model is that, by setting the top working platform into a liftable structure, the working height of the trolley is formed into an adjustable structure, which meets the requirements of the working surface height change due to the change of tunnel height or the change of working mode. At the same time, by setting the telescopic platform and the fixed platform, the trolley has the switchable function of the construction mode of the full section and the micro step, and the fixed platform can also be used for the arch frame assembly under the condition of using the arch frame lifting device to lift the arch frame pieces, thereby forming a multifunctional trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic axonometric diagram of the structure of the utility model, and is used for a state of full-section construction, with the top working platform lowered to a low position.

[0018] Figure 2 It is a schematic axonometric diagram of the structure of the utility model, and is used for the state of micro-step construction, with the top working platform lowered to a low position.

[0019] Figure 3 It is a schematic axonometric diagram of the structure of the utility model, and is used for the state of micro-step construction, with the middle bracket extending out to a certain length and the top working platform lowered to a low position.

[0020] Figure 4 It is a schematic axonometric diagram of the structure of the utility model, and is used for the state of micro-step construction, with the middle bracket extending out to a certain length and the top working platform raised to a high position.

[0021] Figure 5 It is a structural schematic axonometric diagram of the top working platform in the utility model.

[0022] Figure 6 It is a structural schematic axonometric diagram of the trolley body in the utility model.

[0023] Figure 7 It is a structural schematic axonometric diagram of the intermediate bracket in the utility model.

[0024] Figure 8 It is a structural schematic axonometric diagram of the telescopic stand in the utility model.

[0025] Fig. 9 It is a schematic front view of the structure of the telescopic stand in the utility model. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A tunnel construction trolley with variable height includes a trolley main body 10 arranged on a trolley chassis or having a chassis structure, side working platforms 20 are arranged on both sides of the trolley main body 10, and the trolley main body 10 is provided with a top working platform 30; a top platform lifting cylinder 31 for driving the top working platform 30 is arranged between the top working platform 30 and the trolley main body 10.

[0028] The top working platform 30 includes an intermediate platform 32 and a side platform 33, and the intermediate platform 32 and the side platform 33 are rigidly connected. The top working platform 30 is also provided with two parallel first lifting longitudinal beams 34, and the first lifting longitudinal beams 34 are driven to rise and fall based on the first longitudinal beam lifting cylinder 35; the first lifting longitudinal beam 34 is provided with a rail vehicle-type first transport trolley 36. The trolley body 10 includes a fixed platform 11 and a telescopic platform 12, and the telescopic platform 12 is driven to telescope by the platform telescopic driving cylinder, and at least two cylinder legs 12a are provided at the front end of the telescopic platform 12. The top working platform 30 is mounted on the telescopic platform 12, and upper side wing platforms 12b are provided on both sides of the telescopic platform 12.

[0029] See also Figure 6The fixed platform 11 is located at one end of the trolley close to the tunnel entrance. An arch lifting device 11a and two parallel second lifting longitudinal beams 11b are provided on the fixed platform 11. A second longitudinal beam lifting cylinder 11c is connected between the second lifting longitudinal beam 11b and the trolley body 10. A rail vehicle-type second transport trolley 11d is provided on the second lifting longitudinal beam 11b.

[0030] See also Figure 7 , Figure 8 and Fig. 9 An intermediate bracket 40 is also provided between the telescopic platform 12 and the trolley body 10. The intermediate bracket 40 is longitudinally telescopically connected to the trolley body 10 and is driven to telescopically move by the bracket cylinder; two sets of support rollers 41 are provided at the front end of the intermediate bracket 40, and the support rollers 41 form a support for the telescopic platform 12. The intermediate bracket 40 is a horizontally arranged door frame-shaped structure; the support rollers 41 are arranged on the side of the door column 42; the trolley body 10 is formed with a window 10a for two door columns 42 to pass through, and the door column 42 is formed by two parallel H-shaped steels. The telescopic platform 12 is provided with two platform longitudinal beams 12c carried on the supporting rollers 41. The platform longitudinal beams 12c are formed by two parallel H-shaped steels. The two platform longitudinal beams 12c are fixedly connected together by a plurality of parallel platform cross beams 12d located above the platform longitudinal beams 12c. Both ends of the platform cross beams 12d are fixedly connected with platform column feet 12e, and a limit bar 12f is fixedly connected to the inner side of the platform column foot 12e on the same side; the limit bar 12f is located on the outside of the window frame of the window 10a.

[0031] In this embodiment, the trolley body 10 is arranged on a trolley chassis, which is composed of two independently arranged road vehicle chassis having a power system and a travel system. The road vehicle chassis adopts the same structure as the existing chassis disclosed in CN219953348U.

[0032] In this embodiment, each platform constituting the wing working platform 20 is provided with a side push bar 22 driven by a side push cylinder 21, and the side push bar 22 is arranged along the longitudinal direction of the trolley. Among them, the side platform 33, the upper wing platform 12b and the two side wing platforms at the middle and lower parts together constitute the wing working platform 20.

[0033] When the trolley of this embodiment is installing the arch frame, the telescopic platform 12 and the middle bracket 40 are both in a retracted state, and the weight of both is completely unloaded on the trolley body 1. In the construction section with a good surrounding rock grade, the top working platform 30 is lowered to a low position, and the telescopic platform 12 and the first longitudinal beam lifting cylinder 35 are directly supported on the trolley body 1. When the arch frame is installed, the reaction force of the arch frame lifting force directly acts on the trolley body 1. In the construction section with a relatively poor surrounding rock grade, the top working platform 30 rises to a set height, and the telescopic platform 12 is still directly supported on the trolley body 1. The first longitudinal beam lifting cylinder 35 leaves the trolley body 1 at a set height as the top working platform 30 rises. To ensure construction safety, at this time, a cushion block is set between the first longitudinal beam lifting cylinder 35 and the trolley body 1, so that the reaction force of the arch frame lifting force is transmitted to the trolley body 1 through the cushion block.

[0034] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A tunnel construction trolley with a variable height, comprising a trolley body (10) arranged on a trolley chassis or having a chassis structure, side working platforms (20) being arranged on both sides of the trolley body (10), and a top working platform (30) being arranged on the trolley body (10); characterized in that: A top platform lifting cylinder (31) for driving the top working platform (30) is provided between the top working platform (30) and the trolley body (10).

2. The variable height tunnel construction trolley according to claim 1, characterized in that: The top working platform (30) comprises a middle platform (32) and a side platform (33), and the middle platform (32) and the side platform (33) are rigidly connected.

3. The variable height tunnel construction trolley according to claim 1, characterized in that: The top working platform (30) is also provided with two parallel first lifting longitudinal beams (34), and the first lifting longitudinal beams (34) are driven to rise and fall based on the first longitudinal beam lifting cylinder (35); and a rail vehicle-type first transport trolley (36) is provided on the first lifting longitudinal beam (34).

4. The variable height tunnel construction trolley according to any one of claims 1 to 3, characterized in that: The trolley body (10) comprises a fixed platform (11) and a telescopic platform (12); the telescopic platform (12) is driven to telescope by a platform telescopic drive cylinder; at least two cylinder legs (12a) are provided at the front end of the telescopic platform (12); the top working platform (30) is mounted on the telescopic platform (12), and upper side wing platforms (12b) are provided on both sides of the telescopic platform (12).

5. The variable height tunnel construction trolley according to claim 4, characterized in that: The fixed platform (11) is located at one end of the trolley close to the tunnel entrance, and an arch hoisting device (11a) and two parallel second lifting longitudinal beams (11b) are provided on the fixed platform (11), a second longitudinal beam lifting cylinder (11c) is connected between the second lifting longitudinal beam (11b) and the trolley body (10), and a rail vehicle-type second transport trolley (11d) is provided on the second lifting longitudinal beam (11b).

6. The variable height tunnel construction trolley according to claim 4, characterized in that: An intermediate bracket (40) is also provided between the telescopic platform (12) and the trolley body (10); the intermediate bracket (40) is longitudinally telescopically connected to the trolley body (10) and is driven to telescopically move by a bracket cylinder; Two groups of supporting rollers (41) are provided at the front end of the middle bracket (40), and the supporting rollers (41) form support for the telescopic stand (12).

7. The variable height tunnel construction trolley according to claim 6, characterized in that: The intermediate bracket (40) is in the form of a horizontally arranged door frame-shaped structure; the supporting roller (41) is arranged on the side of a door column (42); the trolley body (10) is formed with a window (10a) for two door columns (42) to pass through, and the door columns (42) are formed by combining two parallel H-shaped steels.

8. The variable height tunnel construction trolley according to claim 7, characterized in that: The telescopic platform (12) is provided with two platform longitudinal beams (12c) supported on the supporting rollers (41); the platform longitudinal beams (12c) are formed by combining two parallel H-shaped steels; the two platform longitudinal beams (12c) are fixedly connected together by a plurality of platform cross beams (12d) arranged in parallel and located above the platform longitudinal beams (12c); platform column feet (12e) are fixedly connected at both ends of the platform cross beam (12d); a limit bar (12f) is fixedly connected to the inner side of the platform column foot (12e) on the same side; the limit bar (12f) is located on the outer side of the window frame of the window (10a).

9. The variable height tunnel construction trolley according to any one of claims 1 to 3, characterized in that: The trolley body (10) is arranged on a trolley chassis, and the trolley chassis is composed of two independently arranged road vehicle chassis having a power system and a travel system.

10. The variable height tunnel construction trolley according to any one of claims 1 to 3, characterized in that: Each platform constituting the side wing working platform (20) is provided with a side jack bar (22) driven by a side jack oil cylinder (21), and the side jack bar (22) is arranged along the longitudinal direction of the trolley.

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