Crawler-mounted telescoping boom crane and method of construction

Abstract

The application discloses a caterpillar type contraction folding arm crane and a construction method. The caterpillar type contraction folding arm crane comprises a caterpillar type vehicle body, a telescopic folding arm hoisting mechanism and a rear material towing vehicle body. The telescopic folding arm hoisting mechanism is arranged on the caterpillar type vehicle body and is provided with a telescopic main arm, a sub-arm and a hydraulic winch mechanism. The hoisting hook is connected to the winch rope of the hydraulic winch mechanism. The caterpillar type vehicle body is connected to the rear material towing vehicle body through a towing beam. The towing beam is in sliding fit with the rear material towing vehicle body. The towing beam is provided with a limiting piece to prevent the towing beam from being separated from the rear material towing vehicle body. When the caterpillar type vehicle body moves, the towing beam slides relative to the rear material towing vehicle body, so that the caterpillar type vehicle body has a free space. The crane can stably, flexibly and efficiently hoist in a limited space. The crane solves the problems that the existing truck crane is inconvenient to operate, is not flexible in scene changing, and is too large and heavy to adapt to flexible hoisting operation in a tunnel, a deep foundation pit and a housing construction area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of construction engineering, and more particularly, to a caterpillar track type retractable folding arm crane and a construction method. BACKGROUND

[0002] During the construction process of tunnel, deep foundation pit and house building, some objects are light in weight, and the hoisting distance is short, so the hoisting machinery needs to be frequently moved, and the working height of the construction area is limited, so the hoisting machinery needs to be able to work in a limited space. Taking tunnel hoisting construction as an example, tunnel precast blocks, arch frame mesh, geomembrane waterproof board, steel plate, steel bar, section steel, pipe material and other materials need to be hoisted from the material stacking place or the feeding place to the tunnel construction position, and the hoisting machinery needs to move back and forth in the limited space of the tunnel to flexibly perform hoisting operation, which requires the hoisting machinery to be light and flexible and to be able to adapt to the size of the tunnel space.

[0003] In the prior art, the traditional truck crane has the advantages of being light and flexible, but needs to be moved by driving the vehicle multiple times and stretching four legs for operation, which is not convenient to operate and is not conducive to scene transfer. For example, the truck crane disclosed in Publication No. CN207738363U needs to contact the legs with the ground to keep the vehicle body stable during construction.

[0004] The caterpillar crane chassis is stable and does not need to stretch the legs for operation, but due to the height limitation of the construction area, the large hoisting arm mechanism of the caterpillar crane affects its application in the construction area. For example, the caterpillar crane disclosed in Publication No. CN101704476B has a main arm, a sub-arm, a sub-arm front pull plate, a sub-arm support rod and a mast, and the composed hoisting arm is large and cannot be telescopic, so it cannot be flexibly hoisted and operated in the construction area of the tunnel, deep foundation pit and house building.

[0005] Based on this background, the applicant designs a light-weight caterpillar track type retractable folding arm crane and a construction method according to the construction needs, which is mainly aimed at objects with a hoisting weight of 20T or less, can flexibly perform short-distance hoisting operation in the limited construction space of the tunnel, foundation pit and house building, and improves the construction efficiency. SUMMARY

[0006] An object of the present application is to solve at least the above-mentioned defects and to provide at least the advantages to be explained later.

[0007] Another object of the present application is to provide a caterpillar track type retractable folding arm crane, which utilizes a caterpillar track type vehicle body, a telescopic folding arm hoisting mechanism and a rear material towing vehicle body that does not affect the operation of the caterpillar track type vehicle body, realizes stable, flexible and efficient hoisting operation of the crane in a limited space, and solves the problems of the existing truck crane, such as inconvenient operation, inflexible scene transfer, and the large and heavy caterpillar crane that cannot adapt to the flexible hoisting operation in the construction area of the tunnel, deep foundation pit and house building.

[0008] Another object of the present application is to provide a construction method of the crawler-type telescopic folding arm crane, which uses the rear trailer as a mobile material pile to load engineering materials or equipment, and the telescopic folding arm lifting mechanism starts lifting during the travel of the crawler-type vehicle body towing the rear trailer along the construction area, to perform the stop-and-go operation and improve the construction efficiency.

[0009] To achieve these objects and other advantages of the present application, a crawler-type telescopic folding arm crane is provided, which comprises a crawler-type vehicle body, a telescopic folding arm lifting mechanism and a rear trailer.

[0010] The telescopic folding arm lifting mechanism is arranged on the crawler-type vehicle body, and comprises a telescopic main arm, a sub-arm swingably arranged at the top end of the main arm, and a hydraulic winch mechanism arranged on the crawler-type vehicle body. The winch rope of the hydraulic winch mechanism is arranged along the main arm and the sub-arm, is released at the front end of the sub-arm, and is connected with a lifting hook for lifting materials.

[0011] The crawler-type vehicle body is connected with the rear trailer through a tow beam, the tow beam is in sliding fit with the rear trailer, and the tow beam is provided with a limiting member to prevent the tow beam from being separated from the rear trailer. When the crawler-type vehicle body moves, the tow beam slides relative to the rear trailer to provide the crawler-type vehicle body with a free space.

[0012] Preferably, in the crawler-type telescopic folding arm crane, the telescopic arm lifting mechanism comprises the telescopic main arm, which is swingably connected with the crawler-type vehicle body up and down and is supported by a first telescopic cylinder to swing up and down to adjust the pitch angle, and the sub-arm, which is swingably driven by a second telescopic cylinder to adjust the pitch angle. A plurality of pulleys are arranged on the main arm and the sub-arm as the supporting points of the winch rope, and the pulleys are in fit with the winch rope.

[0013] Preferably, in the crawler-type telescopic folding arm crane, the rear trailer is located above the tow beam to press the tow beam when the tow beam is tilted, and the rear trailer is provided with a movable space for the tow beam to slide forward, backward, leftward and rightward. When the crawler-type vehicle body moves forward, backward, leftward and rightward, the tow beam slides in the movable space, so that the crawler-type vehicle body has a free degree of movement. The tow beam is provided with a removable limiting column as the limiting member, the limiting column is clamped on the rear trailer to prevent the tow beam from being separated from the rear trailer.

[0014] Preferably, in the caterpillar type telescopic folding arm crane, the rear material towing vehicle body is provided with a transverse sliding groove and a vertical sliding groove, the transverse sliding groove faces the caterpillar type vehicle body, the towing beam is inserted into the transverse sliding groove and can slide left and right, and a through slot is arranged along the length direction of the towing beam, the slot is terminated at the front and rear ends of the towing beam, a limiting column is inserted downward from the vertical sliding groove and passes through the slot, when the towing beam moves forward and backward, the limiting column slides along the slot and stops at the termination of the slot to prevent the towing beam from disengaging from the rear material towing vehicle body, and when the towing beam moves left and right, the limiting column slides left and right along the vertical sliding groove without affecting the free movement of the towing beam.

[0015] Preferably, in the caterpillar type telescopic folding arm crane, a plurality of steel beams or steel pipes are connected to form a steel frame, the steel frame is provided with the transverse sliding groove and the vertical sliding groove, the steel frame is connected with the rear material towing vehicle body or is a part of the rear material towing vehicle body, the transverse sliding groove is lower than the frame of the rear material towing vehicle body, so that the towing beam can be inserted below the frame without affecting the forward and backward sliding of the towing beam, and when the towing beam is likely to be tilted upward, the frame presses the towing beam to maintain the balance of the caterpillar type vehicle body.

[0016] Preferably, in the caterpillar type telescopic folding arm crane, the rear material towing vehicle body is a track type walking vehicle body or a wheel type walking vehicle body, the frame of the rear material towing vehicle body is formed by connecting steel beams, and a material loading rack is arranged above the frame of the rear material towing vehicle body, and the rack is provided with an opening.

[0017] Preferably, in the caterpillar type telescopic folding arm crane, the towing beam is welded or detachably connected with the frame of the caterpillar type vehicle body.

[0018] The caterpillar type telescopic folding arm crane is used in tunnel construction, and a method for tunnel construction is provided.

[0019] The track type walking vehicle body is selected as the rear material towing vehicle body, a track for the walking of the rear material towing vehicle body is laid along the extension direction of the construction tunnel, and the track is connected with loading points and unloading points in series; or after the ground of the tunnel is hardened, the wheel type walking vehicle body is used as the rear material towing vehicle body; the caterpillar type vehicle body is connected with the rear material towing vehicle body through the towing beam in front.

[0020] The materials or equipment required for tunnel construction are first loaded on the rear material towing vehicle body, and the caterpillar type vehicle body drags the rear material towing vehicle body to walk.

[0021] When walking to the unloading point, the telescopic arm hoisting mechanism hoists the materials or equipment on the rear material towing vehicle body to the unloading point, or loads the materials or equipment transported from the unloading point on the rear material towing vehicle body, so that the rear material towing vehicle body sequentially passes through each unloading point to perform the stop-and-go hoisting or hoisting transportation operation.

[0022] During the hoisting process, the crawler body and the rear material trailer body are connected through the drag beam sliding connection, so that the crawler body has the spatial freedom degree of moving forward, backward, left and right, and the telescopic arm hoisting mechanism has a larger hoisting construction range; when the crawler body moves to the lower arch waist position of the tunnel, the main arm of the telescopic arm hoisting mechanism is shortened, and the auxiliary arm is adjusted to a smaller pitch angle, so as to adapt to the height of the hoisting construction area; when the scene needs to be changed, the main arm of the telescopic arm hoisting mechanism is shortened, the auxiliary arm is folded to the main arm, the height and volume are reduced, then the rear material trailer body is dragged to change the scene, or the drag beam is removed to separate the crawler body and the rear material trailer body, and then the scene is changed.

[0023] The application provides a method for construction in a foundation pit by using the crawler type telescopic folding arm crane.

[0024] The rear material trailer body is selected as a wheel walking type vehicle body, the loading point is arranged near the foundation pit tower crane, the building materials or construction equipment transported from the foundation pit tower crane is placed at the loading point, the crawler body drags the rear material trailer body to the loading point to perform hoisting and loading operation, then the crawler body drags the rear material trailer body to each construction unloading point to perform hoisting and unloading; the crawler body can also drag the rear material trailer body to hoist and transport the earthwork excavated at each construction point to the loading point, and then the earthwork is uniformly transported out of the foundation pit through the foundation pit tower crane; the above process is repeated to realize flexible hoisting operation in the foundation pit.

[0025] The application provides a method for construction in a house building by using the crawler type telescopic folding arm crane.

[0026] The house building materials are loaded on the rear material trailer body, then the crawler body drags the rear material trailer body to the construction point, during hoisting, the main arm of the telescopic arm hoisting mechanism is adjusted in height, the auxiliary arm is adjusted in pitch angle, so that the auxiliary arm can extend into the internal construction point of the house building, and the building materials are directly hoisted from the rear material trailer body to the internal construction point of the house building.

[0027] The application at least has the following beneficial effects:

[0028] The present application is based on a crawler body, which uses the wide supporting area and low center of gravity of the crawler body as support without the need for additional support feet, can stop and walk for operation, and is more conducive to site transfer. Meanwhile, the present application is provided with a telescopic main arm and a swingable auxiliary arm, which can flexibly cope with construction areas of different sizes. In addition, the present application is provided with a rear trailing material vehicle body, which is in sliding cooperation with the crawler body, does not affect the movement of the crawler body, and can load engineering materials or equipment as a mobile material pile, thereby significantly reducing the movement distance of the crane between the material pile and the construction area, improving the construction efficiency, and balancing the crawler body to improve the operation safety of the crane. The combination of the crawler body, the telescopic folding arm mechanism and the rear trailing material vehicle body realizes flexible construction of the crane in limited spaces such as tunnels, deep foundation pits and building construction, and can be used for in-depth rescue in dangerous situations such as tunnel collapse.

[0029] Other advantages, objects, and features of the present application will be apparent from the following detailed description, and will be appreciated by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Structure diagram of a first embodiment of the crawler telescopic folding arm crane according to the present application;

[0031] Figure 2 Structure diagram of a crawler telescopic folding arm crane according to the present application without a rear trailing material vehicle body;

[0032] Figure 3 Structure diagram of a rear trailing material vehicle body according to the present application;

[0033] Figure 4 Structure diagram of a trailing beam according to the present application;

[0034] Figure 5 Connection structure diagram of a crawler vehicle frame and a trailing beam according to the present application;

[0035] Figure 6 Structure diagram of a second embodiment of the crawler telescopic folding arm crane according to the present application. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can implement the present application according to the description.

[0037] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] It should be noted that the experimental methods described in the following embodiments are conventional methods, and the reagents and materials are commercially available unless otherwise specified.

[0039] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "arrangement" should be understood broadly, for example, can be fixedly connected, arranged, or detachably connected, arranged, or integrally connected, arranged. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] As shown in Figures 1-6 A crawler-type retractable folding arm crane, comprising: a crawler body 1, a retractable folding arm hoisting mechanism, and a rear material trailer body 8;

[0041] The retractable folding arm hoisting mechanism is arranged on the crawler body 1, and the retractable folding arm hoisting mechanism has a telescopic main arm 2, a sub-arm 3 swingably arranged at the top end of the main arm, and a hydraulic winch mechanism 4 arranged on the crawler body 1. The winch rope 403 of the hydraulic winch mechanism 4 is arranged along the main arm 2 and the sub-arm 3, is released at the front end of the sub-arm 3, and is connected with a lifting hook 401 for hoisting materials or equipment.

[0042] The crawler body 1 is connected with the rear material trailer body 8 through a drag beam 7, the drag beam 7 is in sliding fit with the rear material trailer body 8, and the drag beam 7 is provided with a limiting piece 9 for preventing the drag beam 7 from being separated from the rear material trailer body 8. When the crawler body 1 moves, the drag beam 7 slides relative to the rear material trailer body 8 to make the crawler body 1 have a free space, and when the limit is exceeded, the crawler body 1 can also drag the rear material trailer body 8 forward through the drag beam 7.

[0043] Specifically, as preferred, the crawler body can directly use the body of a crawler excavator, and a crawler body of a proper size is selected according to the hoisting tonnage. The present application is mainly designed for a hoisting tonnage of less than 20 tons, and a medium or large excavator chassis can completely meet the construction requirements, and a small excavator + weight block can also meet the construction requirements.

[0044] When modifying a tracked excavator, the main boom and bucket of the excavator's digging arm are removed, leaving the auxiliary boom. The main boom is then replaced with a telescopic main boom 2. The telescopic main boom 2 is connected to the tracked vehicle body 1 via a hinge device 202, allowing it to swing. The auxiliary boom 3 is swayably mounted on the top of the telescopic main boom 2 via a hinge shaft 201. A hydraulic winch mechanism 4 is then installed on the tracked vehicle body 1. Several pulleys are installed on the telescopic main boom 2 and the auxiliary boom 3, including, in the illustration: a first pulley 402 and a second pulley 404. The third pulley 405 and the fourth pulley 406 are both located at the protruding points of the auxiliary boom and the turning points where the main boom and the tracked vehicle body connect. They are used to support and constrain the winch 403. In practice, the number and position of the pulleys can be selected according to the shape of the main boom, auxiliary boom, and tracked vehicle body. Located at the protruding points and turning points along the winch route, the winch 403 of the hydraulic winch mechanism, after cooperating with the pulleys, can support and constrain the winch 403, allowing the winch to be arranged along the telescopic main boom 2 and auxiliary boom 3, thus enabling the hydraulic winch mechanism 4 to wind up more effectively. After this modification, the assembly of the tracked vehicle body 1 and the telescopic folding boom lifting mechanism can be completed. The next step is to connect the towing beam, such as... Figure 2 As shown, the trailing beam 7 can be directly welded horizontally to the tracked vehicle frame 103, or it can be connected to the tracked vehicle frame 103 by bolts 11. Correspondingly, the tracked vehicle frame 103 is provided with corresponding bolt holes or welded with connecting parts such as steel beams or steel plates with bolt holes for bolt connection. In the illustration, the trailing beam includes: a first sub-beam 701 and a second sub-beam 702, with slots 703 between the sub-beams. The two ends of the first sub-beam 701 and the second sub-beam 702 are connected and closed, so that the slots 703 stop at both ends of the sub-beams. Figure 2In the structure shown, the first sub-beam 701 and the second sub-beam 702 are both welded to the tracked vehicle body frame 103. In the next step, the assembly of the rear material trailer body is carried out, and the rear material trailer body 8 mainly includes two parts: a material trailer frame 801 and a steel frame 803, which can be welded together or connected by bolts; the material trailer frame 801 is welded using a steel beam, and its size is set according to the size of the construction area and the size of the tracked vehicle body, and it can be equal to or slightly larger than the tracked vehicle body. The steel frame 803 is located at the front end of the material trailer frame 801, and in order to realize the sliding connection of the drag beam 7 and the rear material trailer body 8, the steel frame 803 is provided with vertical sliding grooves 8031 and horizontal sliding grooves 8032, which are through from front to back and from top to bottom. It needs to be noted that the horizontal and vertical here are only to better distinguish the sliding grooves, the drag beam 7 is inserted from the horizontal sliding groove 8032, and the limiting column and other limiting members 9 are inserted from the vertical sliding groove 8031 and pass through the insertion groove 703 on the drag beam 7, so that the drag beam 7 can slide forward, backward, left and right relative to the rear material trailer body 8, and the tracked vehicle body 1 has a certain free space, in which the tracked vehicle body 8 can adjust the position to better adapt to the space of the construction area, for example, when the tracked vehicle body 1 is relatively close to the tunnel waist, at this time the space of the construction area becomes shorter, and the tracked vehicle body 8 can move a certain distance in the transverse direction of the tunnel center line to be closer to the vault position, thereby having a more open working space, and the operator can operate more confidently, which helps to improve the hoisting efficiency; for example, when the sub-arm needs to be inserted into the house building, the tracked vehicle body can move forward, backward, left and right to adjust the position of the sub-arm, so as to accurately hoist the materials and equipment to the target point. Similarly, when the construction area such as tunnel or house building has an emergency and needs rescue, the above operation can also be performed to complete the rescue work in the limited space. Therefore, the sliding connection design of the drag beam and the rear material trailer body avoids the drag of the rear material trailer body 8 or the limitation of the tracked vehicle body 1, so that the crane can better adapt to the space condition of the construction area, thereby more accurately and efficiently completing the hoisting operation and rescue work. In the rear material trailer body, the wheel body 802 is installed on the material trailer frame, and the wheel body 802 is a track wheel or a wheel, the track wheel needs to be installed with a track, and the wheel needs to run on the ground with good support, preferably on the hardened ground, so the corresponding vehicle body can be selected according to the actual situation. The upper part of the rear material trailer body 8 is a goods shelf 804, and the shape of the goods shelf 804 is set according to the needs, and in the figure, the goods shelf 804 has a space enclosed by a fence, which is suitable for loading engineering equipment such as YT28 drilling machine, engineering materials such as prefabricated blocks, steel arches, excavation scaffolds, earthwork, steel bars, steel molds, and brick boards.

[0045] The use of the crawler body 1 of the present embodiment ensures smooth hoisting operation, does not require additional setting of a support leg, and can perform stop-and-go hoisting operation. The telescopic folding arm hoisting mechanism can adapt to the size of the construction area space through telescoping of the main arm 2, and the sub-arm can adjust the pitch angle to facilitate direct extension to the construction position, thereby realizing point-to-point hoisting operation, i.e., directly hoisting the engineering materials or equipment from the rear towing material vehicle body to the construction point, effectively improving the construction efficiency and the applicability of the crane in limited construction spaces such as tunnels, foundation pits, and building construction. The rear towing material vehicle body can load engineering equipment or engineering materials, thereby reducing the round trip frequency of the crane at the loading point and the unloading point, and improving the hoisting construction efficiency.

[0046] Further, in another embodiment, as shown in Figure 1 and 2 , in the telescopic arm hoisting mechanism, the telescopic main arm 2 is connected to the crawler body 1 through the hinged device 202 for up-and-down swinging, and is supported by the first telescopic cylinder 5 for up-and-down swinging to adjust the pitch angle. The sub-arm 3 is driven by the second telescopic cylinder 6 to swing to adjust the pitch angle. The main arm and the sub-arm are provided with a plurality of pulleys as the fulcrums of the hoisting ropes, and the pulleys cooperate with the hoisting ropes.

[0047] Further, in another embodiment, as shown in Figure 1 and 3 , the rear towing material vehicle body 8 is located above the towing beam 7, and is used to press the towing beam when the towing beam is raised to ensure the stability of the crawler body. The rear towing material vehicle body 8 is provided with a movable space for the sliding of the towing beam in front, back, left and right directions. When the crawler body moves in front, back, left and right directions, the towing beam 7 slides in the movable space, so that the crawler body 1 has a movable degree of freedom. The towing beam 7 is provided with a limit post that can be pulled out as a limiting piece 9. The limit post is clamped on the rear towing material vehicle body 8, and is used to prevent the towing beam from being separated from the rear towing material vehicle body.

[0048] Further, in another embodiment, as shown in Figure 1 and 3 , the rear towing material vehicle body 8 is provided with a horizontal and vertical two-dimensional sliding groove. The horizontal sliding groove 8032 faces the front crawler body 1, the towing beam 7 is inserted into the horizontal sliding groove 8032 to be able to slide left and right, and a through slot 703 is provided along the length direction of the towing beam 7. The slot 703 terminates at the front and rear ends of the towing beam. The limit post is inserted downward from the vertical sliding groove 8031, passes through the slot 703, and slides along the slot 703 when the towing beam 7 moves forward and backward, and stops at the termination of the slot to prevent the towing beam 7 from being separated from the rear towing material vehicle body 8. When the towing beam 7 moves left and right, the limit post slides left and right along the vertical sliding groove 8031 without affecting the free movement of the towing beam.

[0049] Further, in another embodiment, as shown in Figure 1 and 3As shown, specifically, several steel beams or steel pipes are connected to form a steel frame 803, which has the transverse sliding groove 8032 and the vertical sliding groove 8031; the steel frame 803 is connected with the rear towed material vehicle body 8 or is a part of the rear towed material vehicle body 8; the transverse sliding groove 8032 is lower than the rear towed material vehicle body frame 801, so that the tow beam 7 can be inserted below the rear towed material vehicle body frame 801 without affecting the forward and backward sliding of the tow beam 7, and when the tow beam 7 is likely to be upturned, the frame presses the tow beam 7 to keep the tracked vehicle body 1 balanced.

[0050] Further, in another embodiment, as shown in Figure 1 and 3 shown, the rear towed material vehicle body 8 is a track walking vehicle body or a wheel walking vehicle body, and the rear towed material vehicle body frame 801 is formed by connecting steel beams, and a material loading rack 804 is arranged above the rear towed material vehicle body frame 801, and the rack 804 is provided with an opening.

[0051] Further, in another embodiment, as shown in Figure 5 shown, the tow beam 7 is welded or detachably connected with the tracked vehicle body frame 103. In the figure, the first beam 701 and the second beam 702 of the tow beam are both welded with the frame, as shown in Figure 3 and 4 shown, a threaded hole is further arranged at one end of the tow beam 7, and after a corresponding threaded connecting piece is fixed on the frame, the tow beam 7 can be detachably connected with the frame through bolts 11.

[0052] Embodiment 1

[0053] Taking a tunnel section of Han-Shi high-speed railway as an example, the length of the tunnel section is about 6 kilometers, and the tunnel is constructed by using the above-mentioned tracked retractable folding arm crane, and the method comprises the following steps:

[0054] As shown in Figure 1 , a track walking vehicle body is selected as the rear towed material vehicle body, a track for the rear towed material vehicle body to walk along is laid along the extension direction of the construction tunnel, and the track is preferably arranged on the midline of the extension direction of the tunnel, and the track can not only be used for the rear towed material vehicle body to travel, but also can be used for other transport machines such as construction frames to travel.

[0055] The track passes through each construction point or the vicinity of each construction point, forming a transport channel connecting the serial loading points and each unloading point; if the ground of the tunnel has been hardened, a wheel walking vehicle body can also be used as the rear towed material vehicle body; the tracked vehicle body is connected with the rear towed material vehicle body through the tow beam in front;

[0056] The materials or equipment required for tunnel construction, such as tunnel primary support prefabricated blocks, arch frame mesh, geomembrane waterproof board, steel plate, steel bar, rack or drilling machine, etc. are first loaded on the rear towed material vehicle body, and the tracked vehicle body pulls the rear towed material vehicle body to walk;

[0057] When walking to the unloading point, the telescopic boom hoisting mechanism hoists the material or equipment on the rear trailing material car body to the unloading point, or loads the material or equipment transported by the unloading point on the rear trailing material car body, so that the rear trailing material car body passes through each unloading point in turn to carry out the stop-and-go type hoisting or hoisting and transporting operation;

[0058] During hoisting, the crawler car body is connected with the rear trailing material car body through the drag beam to make the crawler car body have the spatial freedom degree of moving forward and backward and left and right, and the telescopic boom hoisting mechanism has a larger hoisting construction range; when the crawler car body moves to the hump position with a lower height in the tunnel, the main arm of the telescopic boom hoisting mechanism is shortened, and the auxiliary arm is adjusted to have a smaller pitch angle, so as to adapt to the height of the hoisting construction area; when it is necessary to change the site, the main arm of the telescopic boom hoisting mechanism is shortened, the auxiliary arm is folded to the main arm, and the height and volume are reduced, and then the rear trailing material car body is dragged to change the site, or the drag beam is removed to make the crawler car body and the rear trailing material car body separate and then change the sites respectively.

[0059] In addition, when the tunnel is long and the stacking point is at the tunnel entrance, the crawler car body needs to pull the rear trailing material car body to travel a long distance, at this time, the following method can be used to improve the efficiency, referring to Figure 6 A tractor 11 can be additionally arranged, the tractor 11 is connected with the rear trailing material car body through the drawbar, and the tractor is used to drag the rear trailing material car body to move to the stacking point to load materials, when the tractor is connected with the rear trailing material car body, the crawler car body is not connected with the rear trailing material car body, when the crawler car body is connected with the rear trailing material car body, the tractor is not connected with the rear trailing material car body, so that efficient feeding of the crane is realized.

[0060] Embodiment 2

[0061] A method for construction in a foundation pit by using the crawler telescopic folding arm crane, comprising:

[0062] The wheel walking type car body is selected as the rear trailing material car body, the stacking point is arranged near the foundation pit tower crane, the building materials or construction equipment transported from the foundation pit tower crane is placed at the stacking point, the crawler car body pulls the rear trailing material car body to the stacking point to carry out hoisting and loading operation, and then pulls the rear trailing material car body to each construction unloading point to carry out hoisting and unloading; the crawler car body can also pull the rear trailing material car body to hoist and transport the earthwork excavated at each construction point to the stacking point, and then uniformly transport the earthwork out of the foundation pit through the foundation pit tower crane; in this way, flexible hoisting operation in the foundation pit is realized.

[0063] Embodiment 3

[0064] A method for construction in a building by using the crawler telescopic folding arm crane, comprising:

[0065] The house building material is loaded on the rear trailer body, and then the crawler body drags the rear trailer body to the construction point, during hoisting, the main arm of the telescopic arm hoisting mechanism is adjusted in height, the auxiliary arm is adjusted in pitch angle, so that the auxiliary arm can extend into the house interior construction point, so that the building material can be directly hoisted from the rear trailer body to the house interior construction point.

[0066] Although embodiments of the application have been disclosed in connection with the above specification and drawings, it should be understood that they are not intended to limit the scope of the application to the particular form presented but on the contrary, this application is intended to cover any modifications, equivalents, and alternatives falling within the scope of the application.

Claims

1. A track-based telescoping boom crane characterized by, The invention relates to a track-type vehicle body, a telescopic folding arm hoisting mechanism and a rear material towing vehicle body. The telescopic folding arm hoisting mechanism is arranged on the track-type vehicle body, and has a telescopic main arm, a sub-arm swingably arranged at the top end of the main arm and a hydraulic winch mechanism arranged on the track-type vehicle body. The track-type vehicle body is connected with the rear material towing vehicle body through a towing beam, the towing beam is in sliding fit with the rear material towing vehicle body, and the towing beam is provided with a limiting piece to prevent the towing beam from being separated from the rear material towing vehicle body. The telescopic main arm is swingably connected with the track-type vehicle body, and is supported by a first telescopic cylinder to swing and adjust the pitch angle. The rear material towing vehicle body is located above the towing beam, and is used to press the towing beam when the towing beam is upturned. The rear material towing vehicle body is provided with a movable space for the towing beam to slide forward, backward, leftward and rightward. The rear material towing vehicle body is provided with a horizontal sliding groove and a vertical sliding groove. The rear material towing vehicle body is a track-type vehicle body or a wheel-type vehicle body.

2. A straddle-type folding and telescoping jib crane as claimed in claim 1, characterized in that, The main arm and the sub-arm are provided with a plurality of pulleys as the supporting points of the winch rope.

3. A straddle-type folding and telescoping jib crane as claimed in claim 1, characterized in that, A plurality of steel beams or steel pipes are connected to form a steel frame.

4. A straddle-type folding and telescoping jib crane as claimed in claim 1, wherein, The towing beam is welded or detachably connected with the frame of the track-type vehicle body.

5. A method of constructing a tunnel using the caterpillar retractable folding jib crane according to claim 1, characterized in that, The invention relates to a track-type vehicle body, a telescopic folding arm hoisting mechanism and a rear material towing vehicle body. The materials or equipment required for tunnel construction are first loaded on the rear material towing vehicle body, and the track-type vehicle body drags the rear material towing vehicle body to walk. ​ When walking to the unloading point, the telescopic arm hoisting mechanism hoists the materials or equipment on the rear trailer to the unloading point, or loads the materials or equipment transported by the unloading point on the rear trailer, so that the rear trailer passes through each unloading point in turn to carry out the stop-and-go hoisting or hoisting and transportation operation; During hoisting, the crawler body and the rear trailer are connected through the drag beam, so that the crawler body has spatial freedom degrees of moving forward, backward, left and right, and the telescopic arm hoisting mechanism has a larger hoisting construction range; when the crawler body moves to the hump position with low height in the tunnel, the main arm of the telescopic arm hoisting mechanism is shortened, and the auxiliary arm is lowered to adjust the pitch angle, so as to adapt to the height of the hoisting construction area; when it is necessary to change the scene, the main arm of the telescopic arm hoisting mechanism is shortened, the auxiliary arm is folded to the main arm, the height and volume are reduced, then the rear trailer is dragged to change the scene, or the drag beam is removed to separate the crawler body and the rear trailer and then change the scene respectively.

6. A method of performing construction work in a foundation pit using the caterpillar- folded folding-boom crane according to claim 1, characterized in that, Comprise: The rear trailer is selected as a wheel walking type vehicle body, the loading point is arranged near the foundation pit tower crane, the building materials or construction equipment transported by the foundation pit tower crane are placed at the loading point, the crawler body drags the rear trailer to the loading point to carry out hoisting and loading operation, then the crawler body drags the rear trailer to each construction unloading point to carry out hoisting and unloading; the crawler body can also drag the rear trailer to hoist and transport the earthwork excavated at each construction point to the loading point, and then the earthwork is uniformly transported out of the foundation pit through the foundation pit tower crane; so as to realize flexible hoisting operation in the foundation pit.

7. A method of constructing a building using the caterpillar type telescopic folding jib crane according to claim 1, characterized in that, Comprise: The building materials are loaded on the rear trailer, then the crawler body drags the rear trailer to the construction point, during hoisting, the main arm of the telescopic arm hoisting mechanism is stretched and adjusted in height, the auxiliary arm is adjusted in pitch angle, so that the auxiliary arm can extend into the interior construction point of the building, and the building materials are directly hoisted from the rear trailer to the interior construction point of the building.

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