CN220375536U

CN220375536U - Belt conveyor

Info

Publication number: CN220375536U
Application number: CN202320776560.0U
Authority: CN
Inventors: 孟兴国; 蒙鹏科; 刘晓明; 马铮
Original assignee: National Energy Group Ningxia Coal Industry Co Ltd
Current assignee: National Energy Group Ningxia Coal Industry Co Ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2024-01-23
Anticipated expiration: 2033-04-10

Abstract

The utility model provides a belt conveyor, comprising: the electric transportation platform moves along with the fully-mechanized excavating machine, is used for transporting the belt and driving the belt to rotate; the lifting framework is movably arranged on the electric transportation platform; the driving assembly is arranged on the electric transportation platform and used for driving the lifting framework to move; the hoisting frame is arranged on the lifting framework; one end of the belt is lapped on the hoisting frame; wherein, the lifting framework drives the lifting frame to lift so as to drive the belt to lift to a position corresponding to the belt support. According to the utility model, the lifting frame is driven to lift by the driving assembly, so that the belt can be lifted controllably, when the prolonged belt is installed, the belt is lifted only and is installed in cooperation with the belt support on the ground, the installation can be completed rapidly, the manual belt installation mode is effectively replaced, the time and labor are saved, the safety is high, the belt can be prolonged to follow the motion of the fully-mechanized coal mining machine, and the integral tunneling speed of a roadway is further improved.

Description

Belt conveyor

Technical Field

The utility model relates to the technical field of belt conveying equipment, in particular to a belt conveying device.

Background

Currently, underground coal mine tunneling and coal mining transportation generally adopts an efficient belt transportation mode, for example: the tunneling roadway comprehensive tunneling machine tunnels forwards, and the belt transportation is carried out in real time after the tunneling process is followed. The existing fully-mechanized coal mining machine is used for tunneling forward 8-15 m each day on average, so that the belt conveying device is correspondingly lengthened 8-15 m towards the head-on direction (namely the advancing direction of the fully-mechanized coal mining machine) so as to convey slag stones generated by tunneling and cutting to the ground, the conveying efficiency of the belt is used for limiting the fully-mechanized coal mining process, and the installation speed of the belt and whether the belt can follow the fully-mechanized coal mining machine to move or not determine the tunneling speed of underground roadways.

After the fully-mechanized coal mining machine is tunneled by about 15 meters, the belt is lengthened, the length of the belt in a belt conveying device is about 1500 meters, the belt conveying device is divided into a machine head and a machine tail, the machine head is provided with a belt storage bin, the belt required by extension is stored in the belt storage bin, and the belts in the belt storage bin are in layered stacked arrangement in a tensioning state; the belt conveying device also comprises a tensioning travelling trolley for loosening and tightening the belt; when the existing belt is lengthened, a belt support is correspondingly assembled, the belt support is of an H-shaped frame structure, namely, the belt support comprises a left longitudinal beam, a right longitudinal beam and a middle transverse rotating carrier roller, and a belt support is arranged in a roadway at certain intervals to support the belt to run.

The existing belt extension generally depends on a manual installation mode, at least two workers are required to penetrate the bottom of the belt through long wood sticks at two sides of the belt, then the belt is lifted up simultaneously, and a rotating carrier roller in a belt support is installed at the bottom of the belt to finish the extension of the belt.

Disclosure of Invention

The utility model provides a belt conveying device, which solves the problems that the manual belt installation in the prior art has safety risks, wastes time and labor, and further causes low belt extension installation efficiency.

In order to solve the above problems, the present utility model provides a belt conveyor comprising: the electric transportation platform moves along with the fully-mechanized excavating machine, is used for transporting the belt and driving the belt to rotate; the lifting framework is movably arranged on the electric transportation platform; the driving assembly is arranged on the electric transportation platform and used for driving the lifting framework to move; the hoisting frame is arranged on the lifting framework; one end of the belt is lapped on the hoisting frame; wherein, the lifting framework drives the lifting frame to lift so as to drive the belt to lift to a position corresponding to the belt support.

Further, one end of the lifting framework is rotatably arranged on the electric transportation platform, the lifting frame is arranged at the other end of the lifting framework, and the driving assembly drives the lifting framework to rotate so as to drive the lifting frame to lift.

Further, the lifting framework comprises a first longitudinal frame and a second longitudinal frame, one end of the first longitudinal frame and one end of the second longitudinal frame are respectively and rotatably arranged on the electric transportation platform, and the first longitudinal frame and the second longitudinal frame are arranged at intervals; the extending direction of the first longitudinal frame, the extending direction of the second longitudinal frame and the extending direction of the belt are the same.

Further, the driving assembly comprises a first hydraulic driving part and a second hydraulic driving part, wherein the first hydraulic driving part is arranged on the electric transportation platform and is matched with the first longitudinal frame so as to drive the first longitudinal frame to rotate; the second hydraulic driving part is arranged on the electric transportation platform and matched with the second longitudinal frame to drive the second longitudinal frame to rotate.

Further, the lifting framework further comprises a cross rod, two ends of the cross rod are fixedly connected with the first longitudinal frame and the second longitudinal frame respectively, and the cross rod bears the belt.

Further, the cross bars are at least two, and the at least two cross bars are arranged at intervals along the extending direction of the belt so as to jointly bear the belt.

Further, the hoist and mount frame is H shape structure, and H shape structure includes: the first connecting piece and the second connecting piece are arranged at two sides of the lifting framework at intervals, and the extending direction of the first connecting piece and the extending direction of the second connecting piece respectively form included angles with the extending direction of the lifting framework; and the two ends of the first cross beam are fixedly connected with the first connecting piece and the second connecting piece respectively, and the first cross beam bears the belt.

Further, the hoisting frame further comprises a first limiting rod and a second limiting rod, the first limiting rod is fixedly arranged on the first connecting piece, and the extending direction of the first limiting rod is parallel to the extending direction of the belt; the second limiting rod is fixedly arranged on the second connecting piece, and the extending direction of the second limiting rod is parallel to the extending direction of the belt; the belt is arranged between the first limiting rod and the second limiting rod, and the first limiting rod and the second limiting rod limit the position of the belt together.

Further, the extending direction of the first connecting piece is parallel to the extending direction of the second connecting piece and is perpendicular to the extending direction of the lifting framework respectively; the extending direction of the first cross beam is perpendicular to the extending direction of the first connecting piece; the first limiting rod is fixedly arranged at the joint of the first connecting piece and the first cross beam and is perpendicular to the first connecting piece and the first cross beam respectively; the second limiting rod is fixedly arranged at the joint of the second connecting piece and the first cross beam and is perpendicular to the second connecting piece and the first cross beam respectively.

Further, the hoisting frame also comprises a second cross beam, and two ends of the second cross beam are fixedly connected with the first connecting piece and the second connecting piece respectively; the belt is sleeved on the first cross beam, and the second cross beam is abutted with the belt surface at the lowest part of the belt.

The utility model provides a belt conveying device, which comprises: the electric transportation platform moves along with the fully-mechanized excavating machine, is used for transporting the belt and driving the belt to rotate; the lifting framework is movably arranged on the electric transportation platform; the driving assembly is arranged on the electric transportation platform and used for driving the lifting framework to move; the hoisting frame is arranged on the lifting framework; one end of the belt is lapped on the hoisting frame; wherein, the lifting framework drives the lifting frame to lift so as to drive the belt to lift to a position corresponding to the belt support. According to the utility model, the lifting frame is driven to lift by the driving component, so that the belt can be lifted controllably, when the prolonged belt is installed, only the belt is lifted and is matched with the belt support on the ground, so that the installation can be completed quickly, the mode of manually installing the belt is effectively replaced, the time and labor are saved, the safety is high, the prolonged installation efficiency of the belt is effectively improved, the belt can be prolonged to follow the movement of the fully-mechanized coal mining machine, and the integral tunneling speed of a roadway is further improved; the electric transportation platform can be built by utilizing the existing underground transportation platform, and a new structure is not required to be additionally arranged, so that the cost is effectively reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model 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 utility model. In the drawings:

fig. 1 shows a specific structural schematic diagram of a belt conveyor according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. an electrical transport platform;

20. a belt;

30. lifting the framework; 31. a first longitudinal frame; 32. a second longitudinal frame; 33. a cross bar;

40. a drive assembly; 41. a first hydraulic drive unit; 42. a second hydraulic drive unit;

50. hoisting the frame; 51. a first connector; 52. a second connector; 53. a first cross beam; 54. a first stop lever; 55. a second limit rod; 56. a second cross beam;

60. and a belt bracket.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, an embodiment of the present utility model provides a belt conveyor including:

an electric transportation platform 10 which moves along with the fully-mechanized excavating machine, is used for transporting the belt 20 and driving the belt 20 to rotate;

a lifting frame 30 movably provided on the electric transportation platform 10;

the driving assembly 40 is arranged on the electric transportation platform 10 and is used for driving the lifting framework 30 to move;

a lifting frame 50 provided on the lifting frame 30; one end of the belt 20 is lapped on the hoisting frame 50;

wherein, the lifting frame 30 drives the lifting frame 50 to lift so as to drive the belt 20 to lift to a position corresponding to the belt bracket 60.

According to the utility model, the lifting frame 50 is driven to lift by the driving assembly 40, so that the belt 20 can be lifted controllably, when the prolonged belt 20 is installed, the belt 20 is lifted and is matched with the belt bracket 60 on the ground, so that the installation can be completed quickly, the mode of manually installing the belt 20 is effectively replaced, the time and the labor are saved, the safety is high, the prolonged installation efficiency of the belt 20 is effectively improved, the prolonged belt 20 can follow the motion of the fully-mechanized coal mining machine, and the integral tunneling speed of a roadway is further improved; the electric transportation platform 10 can be built by utilizing the existing underground transportation platform without adding a new structure, thereby effectively reducing the cost.

As shown in fig. 1, one end of the lifting frame 30 is rotatably disposed on the electric transportation platform 10, the lifting frame 50 is disposed at the other end of the lifting frame 30, and the driving assembly 40 drives the lifting frame 30 to rotate so as to drive the lifting frame 50 to lift. By the arrangement, the simplification of the whole structure of the belt conveying device is ensured, and the lifting framework 30 works reliably.

As shown in fig. 1, the lifting frame 30 includes a first longitudinal frame 31 and a second longitudinal frame 32, one end of the first longitudinal frame 31 and one end of the second longitudinal frame 32 are rotatably provided on the electric transportation platform 10, respectively, and the first longitudinal frame 31 and the second longitudinal frame 32 are provided at intervals; the extending direction of the first longitudinal frame 31, the extending direction of the second longitudinal frame 32, and the extending direction of the belt 20 are the same. By the arrangement, the lifting framework 30 is simplified in structure and light in weight; by providing the extending direction of the first longitudinal frame 31, the extending direction of the second longitudinal frame 32, and the extending direction of the belt 20 to be the same, smoothness of the belt 20 in the subsequent extending operation is ensured.

As shown in fig. 1, the driving assembly 40 includes a first hydraulic driving part 41 and a second hydraulic driving part 42, the first hydraulic driving part 41 being provided on the electric transportation platform 10 and cooperating with the first longitudinal frame 31 to drive the first longitudinal frame 31 to rotate; the second hydraulic driving part 42 is disposed on the electric transportation platform 10 and cooperates with the second longitudinal frame 32 to drive the second longitudinal frame 32 to rotate. Through setting up first hydraulic drive portion 41 and second hydraulic drive portion 42 cooperation work, both guaranteed the simple structure of drive assembly 40, be convenient for follow-up purchase and reduce cost, through adopting hydraulic drive's mode again for drive assembly 40 reliable operation and drive power are great, and then satisfy the in-service use demand.

In one embodiment of the present utility model, the first and second hydraulic driving parts 41 and 42 employ an existing conventional hydraulic support structure; in order to ensure the supporting effect of the first hydraulic driving unit 41 and the second hydraulic driving unit 42 on the lifting frame 30 (i.e., to support the belt 20), a pressure gauge is provided on the hydraulic line communicating with the first hydraulic driving unit 41 and the second hydraulic driving unit 42, respectively, and the operating states of the first hydraulic driving unit 41 and the second hydraulic driving unit 42 are monitored constantly by observing the pressure change of the hydraulic oil in the hydraulic line, so that the hydraulic oil can be pressurized or replenished in time when the pressure in the line is too small.

In another embodiment of the present utility model, hydraulic lines respectively communicating with the first hydraulic driving part 41 and the second hydraulic driving part 42 are circularly driven by hydraulic pumps, the hydraulic pumps are disposed on the electric transportation platform 10, and control switches of the hydraulic pumps are installed on the electric transportation platform 10 and close to the driving assembly 40 so as to facilitate the operation control of the workers; by controlling the hydraulic pump, the first hydraulic drive section 41 and the second hydraulic drive section 42 are effectively controlled.

Specifically, the lifting framework 30 further includes a cross bar 33, two ends of the cross bar 33 are fixedly connected with the first longitudinal frame 31 and the second longitudinal frame 32 respectively, and the cross bar 33 carries the belt 20. By arranging the cross bar 33, the belt 20 with a longer length is well supported, and the subsequent operation of extending and tensioning the belt is facilitated; at the same time, the cross bars 33 also enhance the overall strength and rigidity of the lifting frame 30.

As shown in fig. 1, the number of the cross bars 33 is at least two, and the at least two cross bars 33 are spaced apart along the extending direction of the belt 20 to jointly bear the belt 20. By providing a plurality of crossbars 33, the carrying effect on the belt 20 is further improved, and the overall strength and rigidity of the lifting frame 30 are also further enhanced.

In a specific embodiment of the present utility model, the width of the lifting skeleton 30 is adapted to the width of the electric transportation platform 10, the first longitudinal frame 31 and the second longitudinal frame 32 in the lifting skeleton 30 are respectively in an i-steel structure with the model number of 4m/15#, and the cross bar 33 can be in an i-steel structure with the model number of 1.2m/15#, or a round steel with the diameter of 40 mm; by the arrangement, the cost is reduced, and the rigidity and the strength of the lifting framework 30 are ensured to meet the actual use requirements.

As shown in fig. 1, the hanger 50 has an H-shaped structure including: the first connecting piece 51 and the second connecting piece 52 are arranged at two sides of the lifting framework 30 at intervals, and the extending direction of the first connecting piece 51 and the extending direction of the second connecting piece 52 respectively form included angles with the extending direction of the lifting framework 30; the first crossbeam 53, the both ends of first crossbeam 53 respectively with first connecting piece 51 and second connecting piece 52 fixed connection, first crossbeam 53 bears belt 20. By arranging the lifting frame 50 to be of an H-shaped structure, the lifting frame 50 is ensured to be easy to process and mold, and the lifting frame 50 can effectively bear the belt 20; by arranging the extending direction of the first connecting piece 51 and the extending direction of the second connecting piece 52 to have included angles with the extending direction of the lifting framework 30, the belt 20 can be smoothly matched with the lifting frame 50 under the action of gravity.

As shown in fig. 1, the hoisting frame 50 further includes a first limiting rod 54 and a second limiting rod 55, the first limiting rod 54 is fixedly disposed on the first connecting member 51, and an extending direction of the first limiting rod 54 is parallel to an extending direction of the belt 20; the second limiting rod 55 is fixedly arranged on the second connecting piece 52, and the extending direction of the second limiting rod 55 is parallel to the extending direction of the belt 20; wherein the belt 20 is disposed between the first stop lever 54 and the second stop lever 55, the first stop lever 54 and the second stop lever 55 together limit the position of the belt 20. Through setting up first gag lever post 54 and second gag lever post 55, realized the reliable restraint to belt 20 position, simultaneously, when installing the belt 20 of extension on belt support 60, can overlap joint respectively on belt support 60 through first gag lever post 54 and second gag lever post 55, guide belt 20 is in the same place with belt support 60 for installation work is safer convenient.

Specifically, the extending direction of the first connecting piece 51 and the extending direction of the second connecting piece 52 are parallel and perpendicular to the extending direction of the lifting frame 30, respectively; the extending direction of the first cross member 53 is perpendicular to the extending direction of the first link 51; the first limiting rod 54 is fixedly arranged at the joint of the first connecting piece 51 and the first cross beam 53 and is perpendicular to the first connecting piece 51 and the first cross beam 53 respectively; the second limiting rod 55 is fixedly arranged at the joint of the second connecting piece 52 and the first cross beam 53 and is perpendicular to the second connecting piece 52 and the first cross beam 53 respectively. By the arrangement, the integral structure of the lifting frame 50 is guaranteed to be convenient for welding and forming, and the lifting frame 50 is guaranteed to effectively bear the belt 20.

As shown in fig. 1, the hoisting frame 50 further includes a second cross beam 56, and two ends of the second cross beam 56 are fixedly connected with the first connecting piece 51 and the second connecting piece 52 respectively; the belt 20 is sleeved on the first beam 53, and the second beam 56 is abutted against the belt surface at the lowest part of the belt 20. By providing the second cross member 56, the load bearing for the lowermost belt surface of the belt 20 is ensured, further restraining the belt 20.

In one embodiment of the present utility model, the lengths of the first and second connection members 51 and 52 in the hanger 50 are 1.2m, and the lengths of the first and second cross members 53 and 56 are 0.8m; in actual use, the first connecting piece 51 and the second connecting piece 52 may adopt an iron chain structure, and two sides of the first beam 53 and the second beam 56 are respectively connected with the iron chain; this arrangement further reduces the cost and overall weight of the hanger 50.

The specific working principle of the belt conveyor provided by the utility model is now described in detail: the electric transportation platform 10 can be built by utilizing an existing underground transportation platform and is connected with a comprehensive excavator, the comprehensive excavator is used for tunneling forward and driving the electric transportation platform 10 to move together, the electric transportation platform 10 drives the belt 20 to move forward, the driving assembly 40 controls the lifting framework 30 to drive the lifting frame 50 to lift, the belt 20 is lifted to the upper side of the belt support 60, the belt 20 is matched with the belt support 60 arranged on the ground, and then the process is circulated, so that the belt 20 is matched with the belt supports 60 in sequence, and the extension installation of the belt 20 is completed.

In summary, the belt conveyor provided by the utility model has the advantages that the lifting frame 50 is driven to lift by the driving assembly 40, so that the belt 20 can be lifted in a controllable manner, when the prolonged belt 20 is installed, the belt 20 is lifted and is matched with the belt bracket 60 on the ground, the installation can be completed quickly, the manual installation of the belt 20 is replaced effectively, the time and labor are saved, the safety is high, the prolonged installation efficiency of the belt 20 is improved effectively, the prolonged belt 20 can follow the motion of the fully-mechanized excavator, and the integral tunneling speed of a roadway is improved; the electric transportation platform 10 can be built by utilizing the existing underground transportation platform without adding a new structure, thereby effectively reducing the cost.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A belt conveyor, comprising:

an electric transportation platform (10) which moves along with the fully-mechanized excavating machine, is used for transporting a belt (20) and driving the belt (20) to rotate;

a lifting framework (30) movably arranged on the electric transportation platform (10);

the driving assembly (40) is arranged on the electric transportation platform (10) and is used for driving the lifting framework (30) to move;

a hoisting frame (50) arranged on the lifting framework (30); one end of the belt (20) is lapped on the hoisting frame (50);

wherein, the lifting framework (30) drives the lifting frame (50) to lift so as to drive the belt (20) to lift to a position corresponding to the belt bracket (60);

the lifting frame (50) is of an H-shaped structure, and the H-shaped structure comprises:

the first connecting piece (51) and the second connecting piece (52), the first connecting piece (51) and the second connecting piece (52) are arranged at two sides of the lifting framework (30) at intervals, and the extending direction of the first connecting piece (51) and the extending direction of the second connecting piece (52) are respectively provided with an included angle with the extending direction of the lifting framework (30);

the belt (20) comprises a first cross beam (53), wherein two ends of the first cross beam (53) are fixedly connected with the first connecting piece (51) and the second connecting piece (52) respectively, and the first cross beam (53) bears the belt (20).

2. Belt conveyor according to claim 1, characterized in that one end of the lifting frame (30) is rotatably arranged on the electric transportation platform (10), the lifting frame (50) is arranged at the other end of the lifting frame (30), and the driving assembly (40) drives the lifting frame (30) to rotate so as to drive the lifting frame (50) to lift.

3. Belt conveyor according to claim 2, characterized in that the lifting frame (30) comprises a first longitudinal frame (31) and a second longitudinal frame (32), one end of the first longitudinal frame (31) and one end of the second longitudinal frame (32) being rotatably arranged on the electric transport platform (10), respectively, and the first longitudinal frame (31) and the second longitudinal frame (32) being arranged at intervals; the extending direction of the first longitudinal frame (31), the extending direction of the second longitudinal frame (32) and the extending direction of the belt (20) are the same.

4. A belt conveyor according to claim 3, characterized in that the drive assembly (40) comprises a first hydraulic drive (41) and a second hydraulic drive (42), the first hydraulic drive (41) being arranged on the electric transport platform (10) and cooperating with the first longitudinal frame (31) to drive the first longitudinal frame (31) in rotation; the second hydraulic driving part (42) is arranged on the electric transportation platform (10) and is matched with the second longitudinal frame (32) to drive the second longitudinal frame (32) to rotate.

5. A belt conveyor according to claim 3, wherein the lifting frame (30) further comprises a cross bar (33), both ends of the cross bar (33) are fixedly connected to the first longitudinal frame (31) and the second longitudinal frame (32), respectively, and the cross bar (33) carries the belt (20).

6. Belt conveyor according to claim 5, characterized in that at least two of the crossbars (33) are provided, at least two of the crossbars (33) being spaced apart along the extension of the belt (20) for jointly carrying the belt (20).

7. Belt conveyor according to claim 1, characterized in that the lifting frame (50) further comprises a first stop lever (54) and a second stop lever (55), the first stop lever (54) being fixedly arranged on the first connecting piece (51), and the direction of extension of the first stop lever (54) being parallel to the direction of extension of the belt (20); the second limiting rod (55) is fixedly arranged on the second connecting piece (52), and the extending direction of the second limiting rod (55) is parallel to the extending direction of the belt (20); wherein the belt (20) is arranged between the first limiting rod (54) and the second limiting rod (55), and the first limiting rod (54) and the second limiting rod (55) limit the position of the belt (20) together.

8. Belt conveyor according to claim 7, characterized in that the direction of extension of the first connection element (51) and the direction of extension of the second connection element (52) are parallel and respectively perpendicular to the direction of extension of the lifting frame (30); the extending direction of the first cross beam (53) is perpendicular to the extending direction of the first connecting piece (51); the first limiting rod (54) is fixedly arranged at the joint of the first connecting piece (51) and the first cross beam (53) and is perpendicular to the first connecting piece (51) and the first cross beam (53) respectively; the second limiting rod (55) is fixedly arranged at the joint of the second connecting piece (52) and the first cross beam (53), and is perpendicular to the second connecting piece (52) and the first cross beam (53) respectively.

9. Belt conveyor according to claim 1, characterized in that the lifting frame (50) further comprises a second cross beam (56), both ends of the second cross beam (56) being fixedly connected with the first connecting piece (51) and the second connecting piece (52), respectively; the belt (20) is sleeved on the first cross beam (53), and the second cross beam (56) is abutted with the belt surface at the lowest part of the belt (20).