CN219194289U

CN219194289U - Large-lifting-capacity explosion-proof diesel engine crawler crane

Info

Publication number: CN219194289U
Application number: CN202223076843.9U
Authority: CN
Inventors: 刘李路; 杨庆丰; 杨传旺; 张健; 朱峰
Original assignee: Shenyang Shide Technology Co ltd
Current assignee: Shenyang Shide Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-06-16
Anticipated expiration: 2032-11-21

Abstract

The utility model provides a large-lifting-weight explosion-proof diesel engine crawler crane, which comprises a main body platform, a lifting platform, a first telescopic oil cylinder, a second telescopic oil cylinder and a lifting arm assembly, wherein the main body platform is arranged on the main body platform; the lifting platform is arranged on the main body platform and is rotationally connected with the main body platform; one end of the lifting arm assembly is rotationally connected with the lifting platform, one end of the first telescopic oil cylinder and one end of the second telescopic oil cylinder are rotationally connected with the lifting platform, the other end of the first telescopic oil cylinder and the other end of the second telescopic oil cylinder are rotationally connected with the lifting arm assembly, and the first telescopic oil cylinder and the second telescopic oil cylinder are positioned on two sides of the lifting arm assembly; the crane arm assembly comprises a crane arm member and a crane winch member, wherein a hydraulic winch device is arranged at the rear part of the crane arm member, and the front part of the crane arm member is connected with the lifting hook through a steel wire rope. The utility model solves the technical problems of insufficient lifting capacity and limited working range of the cable due to dragging of the existing crane to a certain extent.

Description

Large-lifting-capacity explosion-proof diesel engine crawler crane

Technical Field

The utility model relates to the technical field of mining explosion-proof diesel engine crawler cranes, in particular to a large-lifting-weight explosion-proof diesel engine crawler crane.

Background

The crane is widely applied in the fields of construction, rescue, underground exploitation and the like, and the maximum load of most existing mining cranes is generally low. And along with the continuous increase of the underground depth and the continuous increase of the mining speed, the continuous increase of the performance of the matched equipment of the coal mine brings about the continuous increase of the tonnage of the single part of the equipment, so that other auxiliary equipment is required to be added in the process of disassembling and assembling the equipment and carrying heavier objects, thereby increasing the carrying difficulty.

The cable crane has huge workload of installing and detaching cables before and after each transition use, and the cable is often dragged in the work, so that the potential safety hazard is large. When the traditional crane needs to transfer work, the transfer period is long, and when the crane is transported by the mining flat car, the crane is difficult to climb up and climb down the mining transport car. The crawler belt of the crane needs to be tensioned frequently, so that the working efficiency is affected, and the ground grabbing and climbing of the crane are affected when the crawler belt is loose, so that the crane is often unable to move. When heavy parts are carried, the equipment shakes left and right and is unstable in the hoisting process of the crane due to low self-weight of the equipment or uneven ground and the like, so that hidden danger is buried for safe production. Accordingly, there is an urgent need to provide an explosion-proof diesel engine crawler crane with a large lifting capacity to solve the above-mentioned problems existing in the prior art to some extent.

Disclosure of Invention

The utility model aims to provide a large-lifting-capacity explosion-proof diesel engine crawler crane, which solves the technical problem that the existing crane has insufficient lifting capacity to a certain extent. By adopting the explosion-proof diesel engine, the defect caused by cable operation is overcome, and the potential safety hazard of dragging the cable is reduced. The steel wire rope and the hydraulic winch are adopted to hoist the heavy object, and the structure is simple and easy to maintain. On the basis of the conventional machine type, the structural strength of the suspension arm is increased, and the lifting weight is improved. The ground supporting mechanism is added, the telescopic travel of the ground supporting mechanism is increased by adopting the double-travel oil cylinder, so that the ground leaving height of the whole equipment is increased, the ground is conveniently transported by the mining transport vehicle, the time is saved, and the working efficiency is improved. The hydraulic and mechanical double-track tensioning device is adopted, the tensioning performance is more reliable, and the equipment walking requirement is met. The tail part of the large-lifting-capacity explosion-proof diesel engine crawler crane is provided with a double-hydraulic supporting mechanism, so that equipment works more stably when a large load is lifted.

The utility model provides a large-lifting-weight explosion-proof diesel engine crawler crane, which comprises a main body platform, a lifting platform, a first telescopic oil cylinder, a second telescopic oil cylinder and a lifting arm assembly, wherein the main body platform is arranged on the main body platform; the lifting platform is arranged on the main body platform and is rotationally connected with the main body platform; one end of the lifting arm assembly is rotationally connected with the lifting platform, one end of the first telescopic oil cylinder and one end of the second telescopic oil cylinder are rotationally connected with the lifting platform, the other end of the first telescopic oil cylinder and the other end of the second telescopic oil cylinder are rotationally connected with the lifting arm assembly, and the first telescopic oil cylinder and the second telescopic oil cylinder are positioned on two sides of the lifting arm assembly; the lifting arm assembly comprises a lifting arm component and a lifting winch component, wherein the lifting winch component comprises a hydraulic winch device, a steel wire rope and a lifting hook, the hydraulic winch device is arranged at the rear part of the lifting arm component, and the front part of the lifting arm component is connected with the lifting hook through the steel wire rope. The main body platform is connected with the travelling mechanism, a box body is arranged at the rear part of the main body platform, and a mounting platform is arranged behind the box body. The mounting platform is provided with a driving mechanism, a protective box body and a supporting device, the driving mechanism is arranged in the middle of the mounting platform, and a group of supporting components are respectively arranged on two sides of the rear portion. The protection box body protects the driving mechanism component and is connected with the mounting platform.

Wherein the lifting platform comprises a slewing mechanism and a lifting assembly; the rotary mechanism is rotationally connected with the main body platform, and the lifting assembly is arranged on the rotary mechanism and is fixedly connected with the rotary mechanism; the telescopic ends of the first telescopic oil cylinder and the second telescopic oil cylinder are respectively connected with the lifting assembly in a rotating mode.

The utility model provides a large-lifting-weight explosion-proof diesel engine crawler crane, which also comprises a supporting device, wherein the supporting device comprises a first group of supporting components and a second group of supporting components; the first group of support assemblies and the second group of support assemblies are connected with the main body platform and are oppositely arranged at the front end and the rear end of the main body platform, and the first group of support assemblies and the second group of support assemblies are positioned on the same horizontal plane.

Specifically, the first group of support assemblies and the second group of support assemblies each comprise a square box body arranged along the horizontal direction and a support column arranged along the vertical direction.

Specifically, the lifting assembly comprises a connecting seat and a lifting platform; the connecting seat is connected with the lifting platform and is arranged on the lifting platform; one end of the lifting arm assembly is connected with the connecting seat; the first telescopic oil cylinder and the second telescopic oil cylinder are supported between the lifting arm assembly and the connecting seat and are arranged in an angle.

The lifting arm assembly comprises a fixed section, a telescopic section and a hydraulic cylinder; one end of the hydraulic cylinder is connected with the fixed end, and the telescopic section can extend or retract along the length direction of the lifting arm relative to the fixed section and is connected with the hydraulic cylinder. The fixed end is connected with the connecting seat; the rear part of the fixed end is provided with a hydraulic winch; the telescopic end is connected with the steel wire rope through a reversing wheel; the hydraulic winch is connected with the steel wire rope, and the lifting hook is connected with the steel wire rope.

Specifically, the lifting platform further comprises a driving platform, a diesel tank and a rotation driving device; the steering platform comprises a steering seat and a control valve group, wherein the steering seat and the control valve group are arranged on the lifting platform, and the steering platform is positioned on the side part of the connecting seat. The diesel tank is located the lateral part of connecting seat. The rotary driving device is positioned at the middle position of the first telescopic oil cylinder and the second telescopic oil cylinder, in front of the connecting seat and below the crane arm assembly. The rotation driving device is rotationally connected with the rotation mechanism. The large-lifting-weight explosion-proof diesel engine crawler crane provided by the utility model further comprises a traveling mechanism, wherein the traveling mechanism is connected with the main body platform. The box body is positioned behind the lifting platform and above the main body platform. The tank body comprises a hydraulic oil tank and a water supplementing tank. The mounting platform further comprises a driving mechanism, a protective box body and a supporting device, wherein the driving mechanism is arranged on the mounting platform, and the driving mechanism is located at the rear of the box body. The driving mechanism is arranged in the protective box body, the protective box body is arranged on the mounting platform, and the mounting platform is connected with the main body frame. The protection box body is internally provided with a supporting device, one end of the supporting device is connected with the mounting platform, and the other end of the supporting device extends along the vertical direction and is exposed out of the protection box body. Specifically, the propping device comprises a first propping component and a second propping component; the first supporting component and the second supporting component are oppositely arranged on two sides of the driving mechanism and are positioned at the tail part of the mounting platform.

Further, the first supporting component and the second supporting component comprise a telescopic fixed section, a telescopic section, an oil cylinder and an adjusting sleeve; the telescopic fixed section is connected with the mounting platform and is perpendicular to the mounting platform. One end of the oil cylinder is connected with the fixed end, and the telescopic section can extend or retract relative to the fixed section along the direction vertical to the installation platform and is connected with the oil cylinder. The adjusting sleeve is connected with the telescopic section.

Compared with the prior art, the large-lifting-weight explosion-proof diesel engine crawler crane provided by the utility model has the following advantages:

by adopting the explosion-proof diesel engine, the defect caused by cable operation is overcome, and the potential safety hazard of dragging the cable is reduced. On the basis of the original ground supporting mechanism, the telescopic travel of the ground supporting mechanism is enlarged by adopting the double-travel oil cylinder, so that the ground-leaving height of the whole equipment is increased, the ground is conveniently transported by using the mining transport vehicle, and the time is saved. The device has the advantages that time is saved in work, labor intensity of workers is reduced, and work efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model.

FIG. 1 is a schematic diagram of the overall structure of a large-lifting-weight explosion-proof diesel engine crawler crane provided by an embodiment of the utility model;

fig. 2 is a schematic structural diagram of a second view angle of a large-lifting-weight explosion-proof diesel engine crawler crane according to an embodiment of the utility model;

FIG. 3 is a schematic structural view of a supporting device and a ground supporting mechanism in a large-lifting-weight explosion-proof diesel engine crawler crane provided by the embodiment of the utility model;

FIG. 4 is a schematic diagram of a lifting arm assembly in a large-lifting-weight explosion-proof diesel engine crawler crane according to an embodiment of the utility model;

in the figure: 1-a main body platform; 2-a lifting platform; 3-a first telescopic cylinder; 4-a second telescopic cylinder; 5-a boom assembly; 101-a supporting device; 102, a box body; 103-a mounting platform; 104-a travelling mechanism; 1011-support columns; 1012-square box body; 1031-a drive mechanism; 1032-a protective box body; 1033-roof supporting device; 10331-a first roof component; 10332-a second roof component; 201-a slewing mechanism; 202-a lifting assembly; 2021-coupling sockets; 2022-lifting platform; 20221-operator's seat; 20222-diesel tank; 20223-slewing drive means; 20224-operating a valve set; 501-a boom member; 501-a hoisting winch member; 5011-a hoisting fixing section; 5012-jack-up telescoping section; 5013-a hydraulic cylinder; 5021-lifting hook; 5022-wire rope; 5023-hydraulic winch.

Description of the embodiments

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Accordingly, the following detailed description of the embodiments of the present application, provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote that the component is required to be absolutely horizontal or overhanging, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "coupled" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular is also intended to include the plural unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent after an understanding of the disclosure of the present application. Further, while the examples described herein have a wide variety of configurations, other configurations are possible, as will be apparent upon an understanding of the present disclosure. In addition, technical solutions between the embodiments may be combined with each other, but it is necessary to base that a person skilled in the art can realize the technical solutions, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not existing and not falling within the protection scope of the present application.

Referring to fig. 1 to 4, the utility model provides an explosion-proof diesel engine crawler crane with large lifting capacity, which comprises a boom member 501, a hoisting winch member 502, a first telescopic cylinder 3, a second telescopic cylinder 4, a hoisting assembly 202, a slewing mechanism 201, a travelling mechanism 104, a main body platform 1, a supporting device 101, a box body 102, a mounting platform 103, a driving mechanism 1031, a protection box body 1032 and a supporting device 1033. The fixed ends of the first telescopic oil cylinder 3 and the second telescopic oil cylinder 4 are rotationally connected with the boom member 501, the two sides of the first telescopic oil cylinder 3 and the second telescopic oil cylinder 01 are respectively connected with the boom member 502, the boom member 502 comprises a hydraulic winch 5023, a steel wire rope 5022 and a lifting hook 5021, the hydraulic winch 5023 is arranged at the rear part of the lifting fixed section 5011, and is wound in front of the lifting telescopic section 5012 through the steel wire rope 5022 to be connected with the lifting hook 5021; through the flexible of the first flexible hydro-cylinder 3 and the flexible hydro-cylinder 4 of second in boom member 501 both sides, can promote the holding power to boom assembly 5, thereby make boom assembly 5 have higher lifting capacity, because still be equipped with hoisting winch member 502 on the boom assembly 5, drag wire rope 5022 through hydraulic winch 5023, wire rope 5022 connects lifting hook 5021 and lifts up the heavy object, adopt wire rope 5022 and hydraulic winch 5023 to hoist up the heavy object, the structure sets up simply, the convenience overhauls easily to be maintained, the flexible of the flexible hydro-cylinder 3 of the flexible hydro-cylinder 4 of second of the first flexible hydro-cylinder of second of cooperation boom member 501 both sides again, make the lifting capacity of this application hoist obtain further promotion.

The lifting platform 2 in the application comprises a slewing mechanism 201 and a lifting assembly 202, the slewing mechanism 021 is connected with the lifting platform 2022 on the lifting assembly 202, the lifting assembly 202 is connected with the lifting arm assembly 5, the lifting platform 2022 is provided with a diesel tank 20222 and a slewing drive device 20223, the slewing drive device 20223 is rotationally connected with the slewing mechanism 201, and the slewing drive device 20223 rotates to drive the lifting platform 2, the lifting assembly 202 and the lifting arm assembly 5 to rotate together, so that the cargo can be rotationally carried. In order to facilitate the operation and observation of a driver, the driver's seat 20221 and the operation valve block 20224 are also arranged on the lifting platform 2022, rotate together with the lifting platform 2, the lifting assembly 202 and the lifting arm assembly 5, and extend and retract the first telescopic cylinder 3 and the second telescopic cylinder 4 through the handle operation on the operation valve block 20224, so that the adjustment on the cargo height is realized. Therefore, in order to meet the requirements of working conditions, the lifting assembly 202 can complete 90-degree rotation in the left and right directions through the rotation of the slewing mechanism 201. The working range of the boom assembly 5 is increased.

In order to make the crane more stable during lifting, the large-lifting-weight explosion-proof diesel engine crawler crane provided by the utility model further comprises a supporting device 101, wherein the supporting device comprises a first group of supporting components 101 and a second group of supporting components 105; the first group of support assemblies 101 and the second group of support assemblies 105 are connected with the main body platform 1, and are oppositely arranged at the front end and the rear end of the main body platform 1. The first group of support members 101 and the second group of support members 105 provided at the front and rear ends of the main body platform 1 can be supported on the ground when the crane performs a lifting operation, thereby improving the stability of the crane when the crane performs a lifting operation.

Because the explosion-proof diesel engine crawler crane of big lifting capacity among this application mainly is applied to the environment in the pit, consequently, in order to make the hoist have better obstacle crossing ability, the hoist in this application improves the obstacle crossing ability of hoist through the mode that promotes the chassis height. However, the underground pavement environment is more complex than the ground, and the condition of rough pavement often occurs, and because the supporting device 101 of the crane is positioned at the front end and the rear end of the main body platform, the lower end surfaces of the first group of supporting components 101 and the second group of supporting components 105 are positioned on the same horizontal plane with the lower end surface of the main body platform, so that the obstacle surmounting capability of the whole crane is improved to a certain extent. The first group of support members 101 and the second group of support members 105 each include a square box disposed in a horizontal direction and a support column 1011 disposed in a vertical direction; the lower end surface of the support column 1011 and the lower end surface of the square box 1012 are positioned on the same horizontal plane. The square box 1012 is internally provided with a hydraulic cylinder for pushing out the support column 1011 outwards, when the crane needs to be supported, the hydraulic cylinder in the square box 1012 pushes out the support column 1011 on two sides, and after the support columns 1011 on two sides are in place, the support column 1011 stretches along the vertical direction until one end of the support column 1011 towards the ground is in contact with the ground, so that the crane can perform lifting operation. When the crane is subjected to transition work, the crane is driven to the middle position of the underground iron rail to be longitudinally arranged, the crane is supported off the ground only by enlarging the supporting column 1011 to extend along the vertical direction according to the ground supporting operation steps before the operation, the mining transport vehicle is ensured to smoothly pass through the crane and reach the lower part of the crane, the supporting column is simultaneously retracted by operating the handle, the crane falls onto the mining transport vehicle, the transition work is completed, and the operation is convenient and quick, and the work efficiency is improved.

The large-lifting-capacity explosion-proof diesel engine crawler crane provided by the utility model has the advantages that the driving mechanism 1031 is arranged in the middle of the mounting platform 103, the power of the driving mechanism is in the form of an explosion-proof diesel engine pump station, and compared with the traditional cable crane, the explosion-proof diesel engine crawler crane is not limited by the length of the cable, and can be freely moved to any place needing to work. The traditional crane can transfer or place only by dismantling the cable before and after use, so that the crane is time-consuming and labor-consuming, and is also used for manually transporting and dragging the cable, the labor intensity of workers is high, and potential safety hazards exist. The explosion-proof diesel engine does not have the problems.

The utility model provides an explosion-proof diesel engine crawler crane with large lifting capacity, wherein two sides of a main body platform 1 are respectively provided with a chassis to form a travelling mechanism 104, and a hydraulic and mechanical double-crawler tensioning device is adopted as a tensioning device of the mechanism. The traditional spring tensioning crawler belt is long in time, the crawler belt can be loosened, moreover, when the crane runs into a pit or the road ground is softer, the loosening phenomenon of the crawler belt can occur when the ground grabbing force needs to be increased, the crane cannot move, workers need to immediately and timely tension the crawler belt, deformation and abrasion of a walking gear can be caused for a long time, and the due ground grabbing strength cannot be reached. The hydraulic and mechanical dual-track tensioning device is adopted, when the tracks are tensioned to meet the use requirement, mechanical limit is arranged, so that the tracks are prevented from loosening when walking, the tensioning performance is more reliable, and the equipment walking requirement is met.

During operation, the crane needs to be supported off the ground through the supporting leg which is arranged and can stretch out and draw back along the vertical direction, so that the operation stability of the crane is improved, and in order to further adapt to underground operation, as shown in fig. 1 and fig. 3, in the application, the supporting device 1033 is arranged in the protective box 1032, one end of the supporting device 1033 is connected with the mounting platform 103, the other end of the supporting device 1033 can extend along the vertical direction, the protective box 1032 is exposed, and therefore, when the crane performs heavy lifting operation, the supporting device can be abutted against the top of a roadway, and stable support of the crane is realized. The utility model provides an explosion-proof diesel engine crawler crane with large lifting capacity, wherein a first supporting component 10331 and a second supporting component 10332 are arranged at two sides of a driving mechanism 1031 behind a mounting platform 103. Through setting up first prop up subassembly 10331 and second prop up subassembly 10332, can further promote the stability to the hoist supports, but because the size of hoist receives the tunnel influence in pit, consequently, the first prop up subassembly 10331 that receives the size restriction and second prop up subassembly 10332 and extend the back and can not with the top looks butt in tunnel to need further add the supporting beam, make the one end of supporting beam dock with first prop up subassembly 10331 and second prop up subassembly 10332, and then can make the other end and the tunnel top looks butt of supporting beam, realize the steady support to the hoist.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that the utility model is not limited to the particular embodiments of the utility model, and that various modifications and changes may be made by those skilled in the art without undue burden on the person of the present utility model.

Claims

1. The large-lifting-capacity explosion-proof diesel engine crawler crane is characterized by comprising a main body platform, a lifting platform, a first telescopic oil cylinder, a second telescopic oil cylinder and a lifting arm assembly; the lifting platform is arranged on the main body platform and is rotationally connected with the main body platform; one end of the lifting arm assembly is rotationally connected with the lifting platform, one end of the first telescopic oil cylinder and one end of the second telescopic oil cylinder are rotationally connected with the lifting platform, the other end of the first telescopic oil cylinder and the other end of the second telescopic oil cylinder are rotationally connected with the lifting arm assembly, and the first telescopic oil cylinder and the second telescopic oil cylinder are positioned on two sides of the lifting arm assembly; the lifting arm assembly comprises a lifting arm component and a lifting winch component, wherein the lifting winch component comprises a hydraulic winch device, a steel wire rope and a lifting hook, the hydraulic winch device is arranged at the rear part of the lifting arm component, and the front part of the lifting arm component is connected with the lifting hook through the steel wire rope; the main body platform is connected with the travelling mechanism, a box body is arranged at the rear part of the main body platform, and a mounting platform is arranged behind the box body; the mounting platform is provided with a driving mechanism, a protective box body and a supporting device, the driving mechanism is arranged in the middle of the mounting platform, and two sides of the rear part are respectively provided with a group of supporting components; the protection box body protects the driving mechanism component and is connected with the mounting platform.

2. The high lift capacity explosion-proof diesel engine crawler crane of claim 1, wherein the lifting platform comprises a swing mechanism and a lifting assembly; the rotary mechanism is rotationally connected with the main body platform, and the lifting assembly is arranged on the rotary mechanism and is fixedly connected with the rotary mechanism; the telescopic ends of the first telescopic oil cylinder and the second telescopic oil cylinder are respectively connected with the lifting assembly in a rotating mode.

3. The high lift, explosion-proof diesel engine crawler crane of claim 1, further comprising a support device comprising a first set of support assemblies and a second set of support assemblies; the first group of support assemblies and the second group of support assemblies are connected with the main body platform and are oppositely arranged at the front end and the rear end of the main body platform, and the first group of support assemblies and the second group of support assemblies are positioned on the same horizontal plane.

4. A high capacity explosion proof diesel engine crawler crane according to claim 3, wherein the first set of support assemblies and the second set of support assemblies each comprise a square box disposed in a horizontal direction and a support column disposed in a vertical direction.

5. The high lift capacity explosion-proof diesel engine crawler crane of claim 2, wherein the lifting assembly comprises a coupling seat and a lifting platform; the connecting seat is connected with the lifting platform and is arranged on the lifting platform; one end of the lifting arm assembly is connected with the connecting seat; the first telescopic oil cylinder and the second telescopic oil cylinder are supported between the lifting arm assembly and the connecting seat and are arranged in an angle.

6. The high lift capacity explosion-proof diesel engine crawler crane of claim 2, wherein the boom assembly comprises a fixed section, a telescoping section, and a hydraulic ram; one end of the hydraulic oil cylinder is connected with the fixed end, and the telescopic section can extend or retract relative to the fixed section along the length direction of the lifting arm and is connected with the hydraulic oil cylinder; the fixed end is connected with the connecting seat; the rear part of the fixed end is provided with a hydraulic winch; the telescopic end is connected with the steel wire rope through a reversing wheel; the hydraulic winch is connected with the steel wire rope, and the lifting hook is connected with the steel wire rope.

7. The high lift capacity explosion-proof diesel engine crawler crane of claim 5, wherein the lifting platform further comprises a cab, a diesel tank and a slewing drive device; the steering platform comprises a steering seat and a control valve group, wherein the steering seat and the control valve group are arranged on the hoisting platform, and the steering seat is positioned at the side part of the connecting seat; the diesel tank is positioned at the side part of the connecting seat; the rotary driving device is positioned at the middle position of the first telescopic oil cylinder and the second telescopic oil cylinder, in front of the connecting seat and below the crane arm assembly; the rotation driving device is rotationally connected with the rotation mechanism.

8. The high lift explosion-proof diesel engine crawler crane of claim 1, further comprising a travelling mechanism, the travelling mechanism being connected to the main body platform; the box body is positioned behind the lifting platform and above the main body platform; the tank body comprises a hydraulic oil tank and a water supplementing tank.

9. The large lifting capacity explosion-proof diesel engine crawler crane according to claim 1, wherein the mounting platform further comprises a driving mechanism, a protective box body and a supporting device, the driving mechanism is arranged on the mounting platform, and the driving mechanism is positioned behind the box body; the driving mechanism is arranged in the protective box body, the protective box body is arranged on the mounting platform, and the mounting platform is connected with the main body frame; the protection box body is internally provided with a supporting device, one end of the supporting device is connected with the mounting platform, and the other end of the supporting device extends along the vertical direction and is exposed out of the protection box body.

10. The high lift capacity explosion-proof diesel engine crawler crane of claim 6, wherein the roof support assembly comprises a first roof support assembly and a second roof support assembly; the first supporting component and the second supporting component are oppositely arranged on two sides of the driving mechanism and are positioned at the tail part of the mounting platform; the first supporting component and the second supporting component comprise a telescopic fixed section, a telescopic section, an oil cylinder and an adjusting sleeve; the telescopic fixed section is connected with the mounting platform and is perpendicular to the mounting platform; one end of the oil cylinder is connected with the fixed end, and the telescopic section can extend or retract relative to the fixed section along the direction vertical to the mounting platform and is connected with the oil cylinder; the adjusting sleeve is connected with the telescopic section.