Height limiting crane special for tunnel beam field construction

Abstract

The utility model relates to a special height-limiting crane for tunnel beam field construction, which comprises a horizontally arranged main beam structure, supporting leg assemblies which are vertically distributed and can synchronously and automatically stretch out and draw back are arranged at the two ends of the main beam structure, a walking beam is arranged at the bottom of each supporting leg assembly, and a cart walking mechanism is arranged on each walking beam; a hoisting trolley capable of moving along the main beam structure is further installed on the main beam structure, the hoisting trolley comprises a trolley frame, a trolley walking mechanism is installed on the trolley frame, and a lifting appliance assembly is installed at the bottom of the trolley frame. Therefore, the height space occupied by the hoisting mechanism can be saved so as to enlarge the lifting height of the crane, so that the strut beam can be carried to the beam transporting vehicle when the strut beam with higher height is hoisted in the tunnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and particularly relates to a height-limited crane specially used for tunnel beam yard construction. Background Art

[0002] At present, during tunnel construction, sometimes it is necessary to use a gantry crane to move the support beam from the ground position to the beam carrier vehicle, and the beam carrier vehicle drives the support beam to move along the length direction of the tunnel.

[0003] The existing gantry crane generally includes a main beam structure, legs, a walking beam and a trolley traveling mechanism, etc. And a hoisting trolley capable of moving along the main beam is installed on the top surface of the main beam. During use, the hoisting mechanism installed on the hoisting trolley can first drive the spreader to lift and lift the main beam, and then the hoisting trolley moves along the main beam, and the support beam can be hoisted onto the beam carrier vehicle; however, during the actual use process, since the hoisting mechanism needs to occupy a certain height space, and during the process of hoisting the support beam onto the beam carrier vehicle, the hoisting trolley needs to move along the main beam in an arched tunnel. In order to ensure that the hoisting trolley has enough moving space on the main beam, the height of the legs will be limited, which affects the lifting height of the crane. In this way, when hoisting a support beam with a relatively high height, sometimes due to insufficient lifting height, the support beam cannot be carried onto the beam carrier vehicle. Therefore, there are still drawbacks and deficiencies in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a height-limited crane specially used for tunnel beam yard construction to solve the problems raised in the above background art.

[0005] The technical solution adopted by the utility model to solve the above problems:

[0006] A height-limited crane specially used for tunnel beam yard construction includes a horizontally arranged main beam structure. Both ends of the main beam structure are installed with vertically distributed and synchronously and automatically telescopic leg assemblies. A walking beam is installed at the bottom of each leg assembly, and a trolley traveling mechanism is installed on each walking beam;

[0007] A hoisting trolley capable of moving along the main beam structure is further installed on the main beam structure. The hoisting trolley includes a frame. A trolley traveling mechanism is installed on the frame, and a spreader assembly is installed at the bottom of the frame.

[0008] Further, the spreader assembly includes a connecting frame installed on the frame. A balance beam located below the frame is hinged at the bottom of the connecting frame. Hoisting ropes are installed at both ends of the balance beam, and hooks are installed at the ends of the hoisting ropes far away from the balance beam.

[0009] Furthermore, one end of the suspension rope close to the balance beam is detachably connected to the balance beam through a mounting hole opened on the balance beam, and both ends of the balance beam are provided with a plurality of mounting holes distributed along the length direction of the balance beam.

[0010] Furthermore, the leg assemblies each include two vertically oppositely distributed retractable legs, the top ends of the retractable legs are connected to the main beam structure, the bottom ends of the retractable legs are connected to the walking beam, and a connecting beam is installed between the bottoms of the two retractable legs of each group of leg assemblies, and an electric retractable rod that can drive the retractable legs to be retracted and extended is hinged between each connecting beam and the main beam structure, and the two electric retractable rods can be retracted and extended synchronously.

[0011] Furthermore, the retractable legs include vertically distributed pillars, the bottom ends of the pillars are connected to the walking beams, and the connecting beams are installed between the bottoms of the two pillars of each group of leg assemblies. Each pillar is also slidably sleeved with a sleeve, and the top end of the sleeve is connected to the main beam structure.

[0012] Furthermore, diagonal bracing beams are installed between the two sleeves of one set of leg assemblies and the main beam structure.

[0013] Furthermore, both ends of the main beam structure are equipped with limit baffles that can prevent the lifting trolley from overtravel, and the four corners of the frame are equipped with buffers opposite to the position of the limit baffles.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model is used in two groups, and the two groups of cranes can share one group of crane control system; in addition, each group of cranes can be moved in the tunnel through the trolley walking track laid in the tunnel; in the initial state, the outrigger assembly is in a retracted state, and when the supporting beam needs to be hoisted to the beam transport vehicle, the cranes can be first moved to the two ends of the supporting beam respectively, and the hoisting device assembly can be located above the supporting beam, and then when the supporting beam is hoisted by the hoisting device assembly, the supporting beam can be driven to rise to a certain height through the synchronous and slow extension of the outrigger assembly, and then when the lifting trolley moves along the main When the beam structure moves synchronously, it can drive the supporting beam to move above the beam transport vehicle. At this time, when the support leg assembly is synchronously and slowly retracted, the supporting beam can be dropped onto the beam transport vehicle to complete the lifting. In general, the utility model can drive the supporting beam to be raised and lowered by the extension and retraction of the support leg assembly to lift the supporting beam onto the beam transport vehicle. Compared with the prior art, there is no need to install a winch mechanism on the lifting trolley, thereby saving the height space occupied by the winch mechanism to expand the lifting height of the crane. In this way, when lifting a supporting beam with a higher height in a tunnel, the supporting beam can also be moved to the beam transport vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 One of the structural schematic diagrams of the present utility model in the use state;

[0017] Figure 2 Another structural schematic diagram of the present utility model in the use state;

[0018] Figure 3 is Figure 2 the left view of some devices in

[0019] Reference numerals in the drawings: 1, main beam structure; 2, lifting trolley; 21, frame; 22, trolley traveling mechanism; 3, leg assembly; 31, connecting beam; 32, electric telescopic rod; 33, pillar; 34, sleeve; 4, sling assembly; 41, connecting frame; 42, balance beam; 43, suspension rope; 44, mounting hole; 5, diagonal brace beam; 6, limit baffle; 7, buffer; 8, traveling beam; 9, gantry traveling mechanism; 10, support beam; 11, beam carrier; 12, tunnel. Specific embodiments

[0020] To make the objectives, technical solutions and beneficial effects of the present utility model clearer, the following further describes the embodiments of the present utility model in detail with reference to the drawings.

[0021] As Figures 1 to 3 shown, the present utility model provides a height-limited crane dedicated to tunnel beam yard construction, which can be used to carry the support beam 10 onto the beam carrier 11 in the tunnel 12; when in use, the number of the present utility model is two groups, and the two groups of cranes can share a set of crane control systems; in addition, each group of cranes can move in the tunnel 12 through the gantry traveling rails laid in the tunnel 12; the present utility model includes a horizontally arranged main beam structure 1, and the main beam structure 1 is a double-main-beam rectangular structure; both ends of the main beam structure 1 are installed with vertically distributed leg assemblies 3 that can synchronously and automatically expand and contract. In the initial state, the leg assemblies 3 are in the retracted state, and under the action of the crane control system, the leg assemblies 3 can expand and contract synchronously; a traveling beam 8 is installed at the bottom of each leg assembly 3, and a gantry traveling mechanism 9 is installed on each traveling beam 8. The gantry traveling mechanism 9 is a prior art, which includes traveling wheels, traveling wheel shafts, traveling motors, etc.; when in use, through the gantry traveling mechanism 9, the crane can move along the gantry traveling rails laid in the tunnel 12.

[0022] In addition, a hoisting trolley 2 capable of moving along the main beam structure 1 is installed on the main beam structure 1. The hoisting trolley 2 includes a frame 21, a trolley traveling mechanism 22 is installed on the frame 21, and a spreader assembly 4 is installed at the bottom of the frame 21. The spreader assembly 4 can be used to lift the secondary beam 10; the trolley traveling mechanism 22 is a prior art, which includes traveling wheels, traveling wheel shafts, traveling motors, etc.; during use, the trolley traveling mechanism 22 can move the hoisting trolley 2 along the main beam structure 1 through a trolley traveling track laid on the main beam structure 1 and parallel to the length direction of the main beam structure 1.

[0023] Specifically, when it is necessary to lift the secondary beam 10 onto the beam carrier 11, the crane can be first moved to both ends of the secondary beam 10 respectively, and the spreader assembly 4 is positioned above the secondary beam 10. Then, after the secondary beam 10 is lifted by the spreader assembly 4, through the synchronous and slow extension of the outrigger assembly 3, the secondary beam 10 can be driven to rise to a certain height. Then, when the hoisting trolley 2 moves synchronously along the main beam structure 1, the secondary beam 10 can be driven to move above the beam carrier 11. At this time, when the outrigger assembly 3 retracts synchronously and slowly, the secondary beam 10 can be made to fall on the beam carrier 11 to complete the lifting; generally speaking, the utility model can drive the secondary beam 10 to rise and fall through the telescopic movement of the outrigger assembly 3 to lift the secondary beam 10 onto the beam carrier 11. In this way, compared with the prior art, there is no need to install a winch mechanism on the hoisting trolley 2, so the height space occupied by the winch mechanism can be saved to expand the lifting height of the crane. In this way, when lifting a secondary beam 10 with a relatively high height in the tunnel 12, the secondary beam 10 can also be transported onto the beam carrier 11.

[0024] The specific setting method of the spreader assembly 4 is as follows: As Figure 1 shown in Figure 2 , the spreader assembly 4 includes a connecting frame 41 installed on the frame 21. The bottom of the connecting frame 41 is hinged with a balance beam 42 located below the frame 21 through a hinge shaft, that is, the balance beam 42 can rotate around the hinge shaft; sling ropes 43 are installed at both ends of the balance beam 42, and hooks are installed at the ends of the sling ropes 43 away from the balance beam 42. The hooks can be set as anti-drop hooks; specifically, during use, annular sling ropes can be sleeved on both ends of the secondary beam 10, and then the hooks can be respectively hung on the annular sling ropes on both sides of the top of the secondary beam 10 so that the spreader assembly 4 lifts the secondary beam 10; in addition, since the utility model transports the secondary beam 10 in two groups during the transportation, four lifting points can be used to lift the secondary beam 10 to ensure the stability of the secondary beam 10 during the lifting process.

[0025] Furthermore, as Figure 1 shown in Figure 2As shown, one end of each suspension rope 43 close to the balance beam 42 is detachably connected to the balance beam 42 through a mounting hole 44 opened on the balance beam 42. Specifically, after passing one end of the suspension rope 43 close to the balance beam 42 through the mounting hole 44, a detachable wire rope buckle in the prior art can be used to hang the end of the suspension rope 43 in a loop on the balance beam 42; a plurality of the mounting holes 44 are opened at both ends of the balance beam 42 and are distributed along the length direction of the balance beam 42. In this way, during use, the distance between the two suspension ropes 43 on each balance beam 42 can be adjusted so that the lifting tool assembly 4 can be applicable to lifting girders 10 of different widths.

[0026] The specific setting method of the outrigger assembly 3 is as follows: As Figures 1 to 3 shown, each outrigger assembly 3 includes two vertically and oppositely distributed telescopic outriggers. The tops of the telescopic outriggers are all connected to the main beam structure 1, and the bottoms of the telescopic outriggers are all connected to the walking beam 8. A connecting beam 31 is installed between the bottoms of the two telescopic outriggers of each outrigger assembly 3. An electric telescopic rod 32 capable of driving the telescopic outrigger to expand and contract is hinged between each connecting beam 31 and the main beam structure 1. The two electric telescopic rods 32 can expand and contract synchronously. Specifically, the electric telescopic rod 32 can be set as a hydraulic cylinder, and the electric telescopic rods 32 are all signal-connected to the crane control system; in addition, when the electric telescopic rod 32 reaches the maximum extension length, the main beam structure 1 will not collide with the inner wall of the tunnel 12, and there will be enough space for the hoisting trolley 2 to move on the main beam structure 1; during use, through the synchronous expansion and contraction of the electric telescopic rods 32, the telescopic outriggers can be expanded and contracted to drive the girder 10 to lift and lower.

[0027] The specific setting method of the telescopic outrigger is as follows: As Figures 1 to 3 shown, each telescopic outrigger includes a vertically distributed column 33. The bottom of the column 33 is connected to the walking beam 8. The connecting beam 31 is installed between the bottoms of the two columns 33 of each outrigger assembly 3. A sleeve 34 is slidably sleeved on each column 33. The top of the sleeve 34 is connected to the main beam structure 1. Specifically, during use, through the expansion and contraction of the electric telescopic rod 32, the sleeve 34 can be lifted and lowered along the column 33.

[0028] Furthermore, as Figure 1 and Figure 2 shown, a diagonal brace beam 5 is installed between the two sleeves 34 of one group of outrigger assemblies 3 and the main beam structure 1. The diagonal brace beam 5 can be used to improve the stability of the connection position between the outrigger assembly 3 and the main beam structure 1; during use, the beam carrier 11 is located on the side of the girder 10 away from the diagonal brace beam 5. In this way, after the girder 10 is lifted to a certain height, the diagonal brace beam 5 can be prevented from affecting the movement of the hoisting trolley 2 to drive the girder 10 above the beam carrier 11.

[0029] Furthermore, asFigure 1 As shown in Figure 2 Both ends of the main beam structure 1 are installed with limit baffles 6 that can prevent the hoisting trolley 2 from running beyond the limit. Specifically, the limit baffles 6 are located at both ends of the trolley running track laid on the main beam structure 1. By setting the limit baffles 6, when the hoisting trolley 2 moves along the main beam structure 1, it can prevent the hoisting trolley 2 from colliding with the inner wall of the tunnel 12 in case of an accident. Secondly, buffers 7 opposite to the position of the limit baffles 6 are installed at the four corners of the frame 21, and the buffers 7 are polyurethane buffers. In this way, when the hoisting trolley 2 accidentally collides with the limit baffle 6, the buffer 7 can play a buffering role.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A special height-limited crane for tunnel beam yard construction, comprising a horizontally arranged main beam structure, characterized in that: Both ends of the main beam structure are equipped with vertically distributed outrigger assemblies that can be automatically extended and retracted synchronously. A walking beam is installed at the bottom of each set of outrigger assemblies, and a trolley walking mechanism is installed on the walking beam. A lifting trolley capable of moving along the main beam structure is also installed on the main beam structure. The lifting trolley includes a frame, a trolley traveling mechanism is installed on the frame, and a sling assembly is installed at the bottom of the frame.

2. A special height-limited crane for tunnel beam yard construction according to claim 1, characterized in that: The sling assembly comprises a connecting frame mounted on a vehicle frame, a balance beam located below the vehicle frame is hingedly connected to the bottom of the connecting frame, lifting ropes are mounted on both ends of the balance beam, and a hook is mounted on one end of the lifting rope away from the balance beam.

3. A special height-limited crane for tunnel beam yard construction according to claim 2, characterized in that: One end of the suspension rope close to the balance beam is detachably connected to the balance beam through a mounting hole opened on the balance beam, and both ends of the balance beam are provided with a plurality of mounting holes distributed along the length direction of the balance beam.

4. A special height-limited crane for tunnel beam yard construction according to claim 1, characterized in that: The leg assemblies each include two vertically oppositely distributed retractable legs, the top ends of the retractable legs are connected to the main beam structure, the bottom ends of the retractable legs are connected to the walking beam, and a connecting beam is installed between the bottoms of the two retractable legs of each group of leg assemblies, and an electric telescopic rod that can drive the retractable legs to be retracted and extended is hinged between each connecting beam and the main beam structure, and the two electric telescopic rods can be retracted and extended synchronously.

5. A special height-limited crane for tunnel beam yard construction according to claim 4, characterized in that: The telescopic legs all include vertically distributed pillars, the bottom ends of the pillars are connected to the walking beams, and the connecting beams are installed between the bottoms of the two pillars of each group of leg assemblies. Each pillar is also slidably sleeved with a sleeve, and the top end of the sleeve is connected to the main beam structure.

6. A special height-limited crane for tunnel beam yard construction according to claim 5, characterized in that: Diagonal bracing beams are installed between the two sleeves of one set of outrigger assemblies and the main beam structure.

7. The special height-limited crane for tunnel beam yard construction according to claim 1, characterized in that: Both ends of the main beam structure are equipped with limit baffles that can prevent the lifting trolley from running overtravel, and the four corners of the frame are equipped with buffers that are opposite to the position of the limit baffles.

Images