AU2021372955B2 - Multistage continuous transportation system - Google Patents

Abstract

The present disclosure relates to the technical field of coal mines, specifically to a multistage continuous transportation system. The multistage continuous transportation system includes an excavation device, an anchor conveyor, a first belt conveyor, a self-moving bridge 5 loader and a second belt conveyor. A second end of the excavation device is lapped on the anchor conveyor, two ends of the first belt conveyor are respectively provided with a loading portion and an unloading portion, the loading portion is connected with a second end of the anchor conveyor, a first traveling wheel assembly is provided at a lower end of the unloading portion, and lapped on the self-moving bridge loader so that the first belt conveyor moves in a 10 length direction of the self-moving bridge loader. A second traveling wheel assembly is provided at a second end of the self-moving bridge loader, and lapped on the second belt conveyor so that the self-moving bridge loader moves in a length direction of the second belt conveyor. The multistage continuous transportation system according to the embodiment of the present disclosure has the advantages of high strength, convenient assembly and 15 disassembly, convenient transfer and the like.

Description

MULTISTAGE CONTINUOUS TRANSPORTATION SYSTEM CROSS-REFERENCE TO RELATED APPLICATION

The present disclosure claims priority to and benefits of the Chinese Patent Application

No. 202110032603.X, filed on January 12, 2021, the entire contents of the above applications

are incorporated herein by reference.

FIELD

The present disclosure relates to the technical field of coal mines, specifically to a

multistage continuous transportation system.

BACKGROUND

The transportation of ore rock is a necessary link of underground laneway excavation in

coal mines. With the rapid development of excavation technology, the daily footage of coal

laneway excavation has exceeded 50m, and the ore rock transportation mainly adopts the rigid

lap transfer of a bridge loader and a telescopic belt conveyor, i.e. a bridge loader

transportation system, whose 20m level lap stroke can no longer meet the requirements of

continuous excavation. The production crew must extend the belt frequently, which severely

restricts the improvement of the excavation speed. If the lap length is simply increased by

increasing the number of bridge loader frame bodies, there will be some problems such as

folding the frame, hitting the top, and jamming the machine tail and so on, and the

adaptability is poor. In addition, it is necessary to carry out operations such as troughing,

connecting laneways, cutting holes and so on in the process of laneway excavation. When

excavating laneways, chambers, etc., the transfer path is not straight, and the bridge loader

needs to be disconnected from the excavation device. If other intermittent transportation

modes are used with conveyors to transfer coal, there will be problems of low transportation

efficiency and many operators.

The bending conveying technology can realize multi-directional conveying and

long-distance lap transfer of ore rock in a short path in the underground laneway, which is

generally realized by overlapping a bendable belt conveyor and a step-by-step self-moving tail. However, main defect of this technology is that the length of the system is too long due to the long-distance lap joint, which requires a longer preparation laneway and longer time to move the reverse side upward, and cannot realize the hole cutting operation at the same time. In addition, in the related art, when the tail of the retractable belt conveyor is extended, it needs to be lapped manually with an H-frame, which is labor-intensive.

SUMMARY The present disclosure is based on the inventors' findings and knowledge of the following facts and problems. In the related art, the internal space of a muffler is divided into a left expansion cavity and a right expansion cavity. Taking a suction port located on one side of the left expansion cavity as an example, the airflow inhaled from the suction port will directly enter the left expansion cavity, and the airflow pulsation will cause great disturbance to the airflow in the left expansion cavity, which will easily cause vibration on the side of the left expansion cavity of the muffler, and even cause resonance in severe cases, reducing the silencing effect of the muffler. For this purpose, one embodiment of the present disclosure proposes a suction muffler, which can reduce the disturbance of airflow pulsation at a suction port to the airflow in an expansion cavity, avoid the situation of causing resonance, such that the silencing effect of the suction muffler is ensured. The suction muffler according to at least one embodiment of the present disclosure includes: a housing assembly, in which a cavity is provided in the housing assembly, a suction port and an exhaust port are provided on the housing assembly; at least one baffle, which is arranged in the cavity to divide the cavity into at least two silencing cavities, in which the at least two silencing cavities include a first silencing cavity and a second silencing cavity, the at least one baffle is provided with a through hole to communicate the first silencing cavity with the second silencing cavity, the suction port corresponds to the first silencing cavity; and a first pipeline, in which at least part of the first pipeline is disposed in the first silencing cavity, one end of the first pipeline is communicated with the suction port, and the other end of the first pipeline passes through at least one of the baffles and is communicated with the second silencing cavity.

According to the suction muffler of at least one embodiment of the present disclosure,

the disturbance of the airflow pulsation at the suction port to the airflow in the expansion

cavity is reduced, such that the silencing effect of the suction muffler is ensured.

In some embodiments, the suction muffler further includes a second pipeline. At least a

part of the second pipeline is disposed in the second silencing cavity, one end of the second

pipeline is connected with one of the baffles, and the second pipeline is communicated with

the first silencing cavity through the through hole in at least one of the baffles.

In some embodiments, the first pipeline is a round tube, the inner diameter of the first

pipeline ranges from 6mm to 8mm; and/or the second pipeline is a round tube, the inner

diameter of the second pipeline ranges from 6mm to 8mm.

In some embodiments, a first slot is provided in an inner wall surface of the housing

assembly, and a part of the baffle is fitted in the first slot.

In some embodiments, an end of the first pipeline is provided with a connection

connected with the housing assembly, and the connection is provided with a via hole for

communicating the suction port with the first pipeline.

In some embodiments, a second slot is provided in the inner wall surface of the housing

assembly, and a part of the connection is fitted in the second slot.

In some embodiments, the exhaust port communicates with the first silencing cavity, the

suction port is located below the exhaust port, in a direction where the exhaust port and the

suction port are arranged up and down, the end of the first pipeline connected with the suction

port is higher than the end of the first pipeline communicated with the second silencing cavity.

In some embodiments, the suction port is located below the exhaust port, in the direction

where the exhaust port and the suction port are arranged up and down, the through hole is

located above the end of the first pipeline communicated with the second silencing cavity.

In some embodiments, the housing assembly includes a barrel body and a cover body,

the top of the barrel body is an opening, the cover body is disposed at the top opening of the

barrel body, the baffle and the first pipeline are provided in the barrel body, the suction port is

provided in the barrel body, and the exhaust port is provided in the cover body.

In some embodiments, the first silencing cavity has a first length in a direction from the first silencing cavity to the second silencing cavity, the second silencing cavity has a second length in the direction from the first silencing cavity to the second silencing cavity, and the ratio of the first length to the second length is 1/3 to 2/3.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a multistage continuous transportation system according to one embodiment of the present disclosure. Fig. 2 is a schematic view of an excavation device, an anchor conveyor, a first belt conveyor and a self-moving bridge loader in Fig. 1. Fig. 3 is a schematic view of a first belt conveyor, a self-moving bridge loader and a second belt conveyor in Fig. 1. Fig. 4 is an enlarged view at D in Fig. 3. Fig. 5 is a schematic view of a self-moving bridge loader, a second belt conveyor, and a frame insertion device in Fig. 1.

Fig. 6 is an enlarged view at E in Fig. 5. Fig. 7 is a schematic view of a multistage continuous transportation system for laneway connecting excavation according to one embodiment of the present disclosure. Fig. 8 is a schematic view of a multistage continuous transportation system for hole cutting excavation according to one embodiment of the present disclosure. Fig. 9 is a schematic view of a frame insertion device in Fig. 1. Fig. 10 is a schematic view at F in Fig. 9. Fig. 11 is a schematic view of a frame body of a frame insertion device of a multistage continuous transportation system according to one embodiment of the present disclosure. Fig. 12 is a schematic view of an H-frame in Fig. 9. Fig. 13 is a schematic view of an H-frame mounting bracket in Fig. 9. Fig. 14 is a state diagram of a carrier roller assembly positioned on a carrier roller mounting bracket in Fig. 11. Fig. 15 is a front view of Fig. 14. Reference numerals: multistage continuous transportation system 100; excavation device 1; first end 11; second end 12; anchor conveyor 2; first end 21; second end 22; pin 23; first belt conveyor 3; first end 31; second end 32; loading portion 33; unloading portion 34; first traveling wheel assembly 341; first holder 3411; first traveling wheel 3412; self-moving bridge loader 4; first end 41; first connection hole 411; second end 42; second traveling wheel assembly 43; second holder 431; second traveling wheel 432; second belt conveyor 5; first end 51; second end 52; ventilation and dust removal system 6; first fixed air duct 61; first bracket 611; second fixed air duct 62; second bracket 621; retractable air duct 63; dust collector 64; connecting winch 65; wire rope 651; traction winch 7; wire rope 71; paving device 8; paving manipulator 81; laneway 91; laneway 92; frame insertion device 10; frame body 101; slide rail 1011; intermediate sliding support plate 1012; frame body upper carrier roller 1013; H-frame mounting bracket 102; H-frame positioning portion 1021; baseplate 1022; first positioning plate 1023; first positioning surface 10231; first stopping surface 10232; second positioning plate 1024; second positioning surface 10241; second stopping surface 10242; guide block 1025; first tube guide rail 103; first guide groove 1031; second tube guide rail 104; second guide groove 1041; first tube gripping manipulator 105; second tube gripping manipulator106; second tube driver 108; carrier roller mounting bracket 109; carrier roller positioning portion 1091; middle portion 1092; first portion 1093; first fitted groove 1093; second portion 1094; second fitted groove 1094; guide plate 1095; nut 1196; lead screw 1197; driving cylinder 110; cylinder body 1101; piston rod 1102; first tube storage rack 111; first tube slot 1111; second tube storage rack 112; second tube slot 1121; carrier roller storage rack 113; first support rod 1131; second support rod 1132; first motor 114; second motor 115; third motor 116; sixth motor 117; third oil cylinder 118; cylinder body 1181; piston rod 1182; support frame 20; H-frame 201; first pillar 2011; second pillar 2012; beam 2013; U-groove 2014; tube 202; carrier roller assembly 203; first carrier roller 2031; second carrier roller 2032; third carrier roller 2033; carrier roller bracket 2034; H-frame lower carrier roller 204.

DETAILED DESCRIPTION Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present disclosure and shall not be construed to limit the present disclosure. As shown in Figs. 1-15, a multistage continuous transportation system 100 according to an embodiment of the present disclosure includes an excavation device 1, an anchor conveyor 2, a first belt conveyor 3, a self-moving bridge loader 4 and a second belt conveyor 5. The excavation device 1 has a first end 11 and a second end 12 opposite to each other in a length direction thereof. A second end of the excavation device 1 is lapped on the anchor conveyor 2, and the anchor conveyor 2 has a first end 21 and a second end 22 opposite to each other in a length direction thereof. The first belt conveyor 3 has a first end 31 and a second end 32 opposite to each other in a length direction thereof. A loading portion 33 is provided at the first end 31 of the first belt conveyor 3, and an unloading portion 33 is provided at the second end 32 of the first belt conveyor 3. The loading portion 33 is connected with the second end 22 of the anchor conveyor 2. A first traveling wheel assembly 341 is provided at a lower end of the unloading portion 33 and includes a first holder 3411 mounted on the unloading portion 33 and a first traveling wheel 3412 mounted on the first holder 3411. The first traveling wheel 3412 is lapped on the self-moving bridge loader 4 so that the first belt conveyor 3 moves in a length direction of the self-moving bridge loader 4. The self-moving bridge loader 4 has a first end 41 and a second end 42 opposite to each other in a length direction thereof, and a second traveling wheel assembly 43 is provided at the second end 42 of the self-moving bridge loader 4. The second traveling wheel assembly 43 includes a second holder 431 mounted on the second end of the self-moving bridge loader 4 and a second traveling wheel 432 mounted on the second holder 431. The second traveling wheel 432 is lapped on the second belt conveyor 5 so that the self-moving bridge loader 4 moves in a length direction of the second belt conveyor 5. The second belt conveyor 5 has a first end 51 and a second end 52 opposite to each other in a length direction thereof, and the first end 51 of the second belt conveyor 5 is connected with the self-moving bridge loader 4 to enable the self-moving bridge loader 4 to drive the second belt conveyor 5 to move. The first belt conveyor 3 of the multistage continuous transportation system 100 according to the embodiment of the present disclosure is lapped on the self-moving bridge loader 4 through the first traveling wheel 3412, and the self-moving bridge loader 4 is lapped on the second belt conveyor 5 through the second traveling wheel 432, such that continuous transportation is realized by utilizing the first belt conveyor 3, the self-moving bridge loader 4 and the second belt conveyor 5. Compared with the related techniques of simply increasing a lap length by increasing the number of bridge loader frame bodies or prolonging the length of a bendable belt conveyor, the lap length of the multistage continuous transportation system 100 according to the embodiment of the present disclosure is shared by the lap length of the first belt conveyor 3 and the lap length of the self-moving bridge loader 4, and thus the lap length of the first belt conveyor 3 and the lap length of the self-moving bridge loader 4 are shorter, such that the lengths of the self-moving bridge loader 4 and the first belt conveyor 3 can be effectively shortened. Since the lap length of the self-moving bridge loader 4 and the lap length of the first belt conveyor 3 are relatively short, the strength of the rack of the self-moving bridge loader 4 and the rack of the first belt conveyor 3 can be improved, thereby improving the overall strength of the multistage continuous transportation system 100. Moreover, since the length of the self-moving bridge loader 4 and the first belt conveyor 3 are relatively short, it is convenient to assemble or disassemble the self-moving bridge loader 4 and the first belt conveyor 3. Furthermore, the assembly and disassembly time of the multistage continuous transportation system can be shortened and the efficiency of the excavation operation can be improved. In addition, since the length of the self-moving bridge loader 4 and the first belt conveyor 3 are relatively short, after each component of the multistage continuous transportation system 100 is disassembled, the transfer of the self-moving bridge loader 4 and the first belt conveyor 3 can also be carried out conveniently, and thus the efficiency of excavation operation can be further improved. Thus, the multistage continuous transportation system 100 according to the embodiment of the present disclosure has the advantages of high strength, convenient assembly and disassembly, convenient transfer, high efficiency and so on. As shown in Figs. 1-15, a multistage continuous transportation system 100 according to the embodiment of the present disclosure includes an excavation device 1, an anchor conveyor 2, a first belt conveyor 3, a self-moving bridge loader 4 and a second belt conveyor 5. As shown in Fig. 1 and Fig. 2, the excavation device 1 has a first end 11 and a second end 12 opposite to each other in a length direction thereof, and the second end 12 of the excavation device 1 is lapped on the anchor conveyor 2. Specifically, the second end 12 of the excavation device 1 is rotatable relative to the anchor conveyor 2. The length direction of the excavation device 1 is a front-rear direction, the first end 11 of the excavation device 1 is a front end of the excavation device 1, and the second end 12 of the excavation device 1 is a rear end of the excavation device 1. The front-rear direction is shown by arrow A in Fig. 2. As shown in Fig. 1 and Fig. 2, the anchor conveyor 2 has a first end 21 and a second end 22 opposite to each other in a length direction thereof. The first belt conveyor 3 has a first end 31 and a second end 32 opposite to each other in a length direction thereof. A loading portion 33 is provided at the first end 31 of the first belt conveyor 3, and an unloading portion 33 is provided at the second end 32 of the first belt conveyor 3. In other words, the loading portion 33 is provided at a front end of the first belt conveyor 3, and the unloading portion 33 is provided at a rear end of the first belt conveyor 3. The loading portion 33 is connected with the second end 21 (rear end) of the anchor conveyor 2. A first traveling wheel assembly 341 is provided at a lower end of the unloading portion 33, and includes a first holder 3411 mounted on the unloading portion 33 and a first traveling wheel 3412 mounted on the first holder 3411. As shown in Fig. 1, Fig. 3 and Fig. 4, the first traveling wheel 3412 is lapped on the self-moving bridge loader 4 to enable the first belt conveyor 3 to move in a front-rear direction of the self-moving bridge loader 4. The self-moving bridge loader 4 has a first end 41 and a second end 42 opposite to each other in a length direction thereof, and a second traveling wheel assembly 43 is provided on the second end 42 of the self-moving bridge loader 4. The second traveling wheel assembly 43 includes a second holder 431 mounted on the second end of the self-moving bridge loader 4 and a second traveling wheel 432 mounted on the second holder 431. Preferably, a driving device is disposed on the unloading portion 33 to drive the first belt conveyor 3 to move backward along the self-moving bridge loader 4 through the driving device. Therefore, when the multistage continuous transportation system 100 exits, the first belt conveyor 3 can be driven to move backward only by the anchor conveyor 2, or the first belt conveyor 3 can be driven to move backward only by the driving device of the unloading portion 33, or the power to move the first belt conveyor 3 backward can be provided by both the anchor conveyor 2 and the driving device.

Preferably, the self-moving bridge loader 4 is provided with a leveling mechanism, so that the self-moving bridge loader 4 can entirely swing through a small angle in a left-right direction with the second end 42 thereof as a fulcrum, and can cooperate with the first belt conveyor 3 to realize the turning of the multistage continuous transportation system 100 when the multistage continuous transportation system 100 turns. The left-right direction is shown by arrow C in Fig. 8. As shown in Fig. 1 and Fig. 3, the second traveling wheel 432 is lapped on the second belt conveyor 5 so that the self-moving bridge loader 4 moves in a length direction of the second belt conveyor 5. The second belt conveyor 5 has a first end 51 and a second end 52 opposite to each other in a length direction thereof. The first end 51 of the second belt conveyor 5 can be connected with the self-moving bridge loader 4 to enable the self-moving bridge loader 4 to drive the second belt conveyor 5 to move. As shown in Fig. 3, in some embodiments, the first end 51 of the second belt conveyor 5 is connected with the self-moving bridge loader 4 through a traction winch 7. For example, the traction winch 7 includes a wire rope 71 and a reel for driving the wire rope 71 to wrap up. The wire rope 71 is connected between the first end 51 of the second belt conveyor 5 and the self-moving bridge loader 4, and the reel is mounted on the self-moving bridge loader 4. The connection between the first end 51 of the second belt conveyor 5 and the self-moving bridge loader 4 is realized through the wire rope 71. Thus, when the second end 42 of the self-moving bridge loader 4 moves to a front end of the second belt conveyor 5, the wire rope 71 of the traction winch 7 can be used to pull the second belt conveyor 5 to move forward, thus ensuring the continuous transportation of the multistage transportation system 100. While a front end of the self-moving bridge loader 4 is located between the first end 51 and the second end 52 of the second belt conveyor 5, and the second end 42 of the self-moving bridge loader 4 is far away from the first end 51 of the second belt conveyor 5, the wire rope 71 of the traction winch 7 is in a relaxed state, and the wire rope 71 will not pull the second belt conveyor 5 to move forward. Therefore, it is convenient to use the traction winch 7 to make the second belt conveyor 5 move with the self-moving bridge loader 4, and to make the self-moving bridge loader 4 move relative to the second belt conveyor 5.

In some embodiments, as shown in Figs. 7 and 8, the first belt conveyor 3 is a horizontal bendable belt conveyor that is bendable in a horizontal direction. Therefore, when the multistage continuous transportation system 100 is connecting laneways, it is convenient for the multistage continuous transportation system 100 to realize continuous transportation in a laneway 91. In addition, when the multistage continuous transportation system 100 is cutting holes, it is convenient for the multistage continuous transportation system 100 to realize continuous transportation in the laneway 91. For example, the first belt conveyor 3 includes a rack including a plurality of connecting sections. Two adjacent connecting sections are hinged by a joint bearing or a spherical hinge, and a mechanical limiting structure is arranged on each of an upper side and a lower side of the two adjacent connecting sections to prevent up-down swings between the two adjacent connecting sections, and the mechanical limiting structure may be a limiting plate. An up-down direction is shown by arrow B in Fig. 2. In some embodiments, as shown in Figs. 1-3, the second belt conveyor 5 is a retractable belt conveyor with adjustable length. Thus, the second belt conveyor 5 is utilized to realize the continuous transportation to the rear during the forward excavation of the multistage continuous transportation system 100.

In some embodiments, as shown in Figs. 1 to 6, the multistage continuous transportation system 100 further includes a ventilation and dust removal system 6. The ventilation and dust removal system 6 includes a first fixed air duct 61, a second fixed air duct 62 and a retractable air duct 63. The first fixed air duct 61 is connected to the first belt conveyor 3, the second fixed air duct 62 is connected to the self-moving bridge loader 4, and the retractable air duct 63 is arranged between the first fixed air duct 61 and the second fixed air duct 62. One end of the retractable air duct 63 is connected with the first fixed air duct 61, and the other end of the retractable air duct 63 is connected with the second fixed air duct 62. For example, the material of the retractable air cylinder 63 is a flexible material, thereby realizing the extending or retracting of the retractable air cylinder 63. Specifically, the multistage continuous transportation system 100 includes a connecting winch 65. The connecting winch 65 includes a wire rope 651 and a reel for driving the wire rope to wrap up. The wire rope 651 is connected between the first fixed air duct 61 and the second fixed air duct 62, and the reel is mounted on one of the first fixed air duct 61 and the second fixed air duct 62. The retractable air duct 63 is provided with a plurality of hooks hung on the wire rope 651 to stably connect the retractable air duct 63 between the first fixed air duct 61 and the second fixed air duct 62. Thus, when the first belt conveyor 3 moves in the length direction of the self-moving bridge loader 4 along with the anchor conveyor 2 and the first fixed air duct 61 moves in the length direction of the self-moving bridge loader 4 along with the first belt conveyor 3, the retractable air duct 63 can be extended or retracted in the length direction of the self-moving bridge loader 4 to maintain the connection between the first fixed air duct 61, the second fixed air duct 62 and the retractable air duct 63. When the self-moving bridge loader 4 moves in the length direction of the second belt conveyor 5, when the second fixed air duct 62 moves in the length direction of the second belt conveyor 5 along with the self-moving bridge loader 4, the retractable air duct 63 can be extended or retracted in the length direction of the second belt conveyor 5 to maintain the connection between the first fixed air duct 61, the second fixed air duct 62 and the retractable air duct 63. Therefore, the ventilation and dust removal effect of the multistage continuous transportation system 100 during continuous excavation is ensured. The movement of the first belt conveyor 3 in the length direction of the self-moving bridge loader 4 along with the anchor conveyor 2 includes forward movement of the first belt conveyor 3 along the self-moving bridge loader 4, and backward movement of the first belt conveyor 3 along the self-moving bridge loader 4. The movement of the self-moving bridge loader 4 in the length direction of the second belt conveyor 5 includes forward movement of the self-moving bridge loader 4 along the second belt conveyor 5, and backward movement of the self-moving bridge loader 4 along the second belt conveyor 5. In addition, as shown in Fig. 5, a dust collector 64 is arranged at a rear end of the second fixed air duct 62, and a rear end of the dust collector 64 is hinged with the self-moving bridge loader 4. In some embodiments, as shown in Fig. 1 and Fig. 3, a first bracket 611 is provided at a lower end of the first fixed air duct 61 and connected with a rack of the first belt conveyor 3 via a bolt. A second bracket 621 is provided at a lower end of the second fixed air duct 62 and connected with a rack of the self-moving bridge loader 4. Thus, the first fixed air duct 61 is stably fixed on the rack of the first belt conveyor 3, and the second fixed air duct 62 is stably fixed on the rack of the self-moving bridge loader 4. In some embodiments, the loading portion 33 is hinged with the second end of the anchor conveyor 2 through a pin. Therefore, the loading portion 33 can swing left and right relative to the anchor conveyor 2. As shown in Fig. 7 and Fig. 8, when the multistage continuous transportation system 100 is connecting laneways or cutting holes, it is easier for the multistage continuous transportation system 100 to turn by swinging the loading portion 33 left and right relative to the anchor conveyor 2. In some embodiments, as shown in Fig. 7, a first connection hole 411 is formed in the first end 41 of the self-moving bridge loader 4, and a second connection hole is formed in the anchor conveyor 2. As shown in Fig. 2, the first end of the self-moving bridge loader 4 is connected with the anchor conveyor 2 through a pin 23 fitted in the first connection hole 411 and the second connection hole. The expression that " the first end 41 of the self-moving bridge loader 4 is connected with the anchor conveyor 2 through the pin 23 fitted in the first connection hole 411 and the second connection hole", means that: when the first end 41 of the self-moving bridge loader 4 needs to be connected with the anchor conveyor 2, the first end 41 of the self-moving bridge loader 4 is connected with the anchor conveyor 2 through the pin 23 fitted in the first connection hole 411 and the second connection hole; and when the first end 41 of the self-moving bridge loader 4 does not need to be connected with the anchor conveyor 2, the first end 41 of the self-moving bridge loader 4 may be or may not be connected with the anchor conveyor 2. For example, when the power of the self-moving bridge loader 4 is insufficient or the environment in a laneway is not good, the power of the self-moving bridge loader 4 is insufficient to move itself. In this case, the first end 41 of the self-moving bridge loader 4 is connected with the anchor conveyor 2 through the pin 23 fitted in the first connection hole 411 and the second connection hole, so that the anchor conveyor 2 can be used to provide power to the self-moving bridge loader 4. When the power of the self-moving bridge loader 4 is sufficient to drive itself to move, it is not necessary to use the anchor conveyor 2 to provide power to the self-moving bridge loader 4, the first end of the self-moving bridge loader 4 may not be connected with the anchor conveyor 2. In some embodiments, as shown in Figs. 1 and 2, a paving device 8 is provided on the first end 51 of the second belt conveyor 5. For example, the paving device 8 includes a paving manipulator 81. The paving manipulator 81 is utilized to lay a concrete block on a floor of a laneway, whereby the paving device 8 is utilized to automatically lay the concrete block on the ground of the laneway, reducing human participation, saving a lot of time cost, and reducing the labor intensity of workers. In addition, the multistage continuous transportation system 100 according to the embodiment of the present disclosure can realize the automatic paving function at least to a certain extent by using the paving device 8, so that the multistage continuous transportation system 100 at least has the functions of excavation, transportation and automatic paving, that is, the multistage continuous transportation system 100 is a multifunctional multistage continuous transportation system. As shown in Fig. 1 and Fig. 5, the multistage continuous transportation system 100 according to the embodiment of the present disclosure further includes a frame insertion device 10. As shown in Figs. 9-15, the frame insertion device 10 includes a frame body 101, an H-frame mounting bracket 102, a first tube guide rail 103, a second tube guide rail 104, a first tube gripping manipulator 105, a second tube gripping manipulator 106, a first tube driver, a second tube driver 107 and a carrier roller mounting bracket 109. The frame body

101 is connected with the second end 52 of the second belt conveyor 5, and the frame body 101 is provided with an upper carrier roller 1013 and a lower carrier roller for the frame body.

The H-frame mounting bracket 102 is movably arranged on the frame body 101 in a width direction of the frame body 101, is rotatable relative to the frame body 101, and includes an H-frame positioning portion 1021 for bearing an H-frame 201. A first motor 114 is connected to the H-frame mounting bracket 102 to drive the H-frame mounting bracket 102 to rotate. The first tube guide rail 103 and the second tube guide rail 104 are arranged on the frame body 101 at intervals in the width direction of the frame body 101. Each of the first tube guide rail 103 and the second tube guide rail 104 extends in a length direction of the frame body 101. The first tube gripping manipulator 105 is disposed on the frame body 101 corresponding to the first tube guide rail 103, and the second tube gripping manipulator 106 is disposed on the frame body 101 corresponding to the second tube guide rail 104. A second motor 115 is connected to the first tube gripping manipulator 105 to drive the first tube gripping manipulator 105 to rotate, and a third motor 116 is connected to the second tube gripping manipulator 106 to drive the second tube gripping manipulator 106 to rotate. The first tube driver is disposed on the frame body 101 corresponding to the first tube guide rail 103, and the second tube driver 107 is disposed on the frame body 101 corresponding to the second tube guide rail 104. Each of the first tube driver and the second tube driver 107 includes a fixed portion and a telescopic portion for pushing a tube 202 to move in the length direction of the frame body 101. The telescopic portion is movably disposed on the fixed portion in the length direction of the frame body 101, and the fixed portion is connected with the frame body 101. The carrier roller mounting bracket 109 is movably arranged on the frame body 101 in the length direction of the frame body 101, and includes a height-adjustable carrier roller positioning portion 1091 for bearing a carrier roller. Therefore, when the H-frame 201 is lapped by using the frame insertion device 10 according to the embodiment of the present disclosure, firstly, the H-frame mounting bracket 102 moves in the width direction of the frame body 101 and protrude from one side of the width direction of the frame body 101. After the H-frame 201 is supported and positioned on the H-frame positioning portion 1021, the H-frame mounting bracket 102 moves in the width direction of the frame body 101, so that the H-frame 201 is aligned with the lapped H-frame 201 in the width direction of the frame body 101. Then, the first motor 114 drives the H-frame mounting bracket 102 to rotate by a first preset angle, so that the H-frame 201 is erected on a baseplate 1022 of the laneway. Then, the second motor 115 drives the first tube gripping manipulator 105 to rotate by a second preset angle to place the tube 202 grasped by the first tube gripping manipulator 105 on the first tube guide rail 103, and the third motor 116 drives the second tube gripping manipulator 106 to rotate by a third preset angle to place the tube 202 grasped by the second tube gripping manipulator 106 on the second tube guide rail 104. Then, the first tube driver pushes the tube 202 placed on the first tube guide rail 103 to one side in the width direction of the H-frame 201 erected in the laneway, and the second tube driver 107 pushes the tube 202 placed on the second tube guide rail 104 to the other side in the width direction of the H-frame 201 erected in the laneway, and the tube 202 is fixed on the H-frame 201 to complete the lapping of the H-frame 201. The lapped H-frame forms a support frame 20 for supporting the second belt. After that, the carrier roller mounting bracket 109 places a carrier roller assembly 203 placed on the carrier roller positioning portion 1091 on the tube 202 fixed on the H-frame 201 by lifting and lowering, and fixes the carrier roller assembly 203 on the tube 202, and the lapping of the H-frame 201 is now completed. Therefore, fewer workers are required to participate in the lapping of the H-frame 201, which not only saves a lot of time cost and reduces the labor intensity of workers, but also can realize the rapid lapping of the H-frame 201 in the maintenance or production crew, ensure the continuity of the excavation operation and effectively improve the production efficiency of the excavation operation. In addition, in the case of fewer workers participating in the excavation operation process, it is also possible to effectively ensure the smooth progress of the lapping work of the H-frame 201, thereby ensuring the continuity of the excavation operation and improving the work efficiency of the excavation operation. Therefore, the frame insertion device 10 according to the embodiment of the present disclosure has the advantages of fewer human participation and high production efficiency. In addition, the multistage continuous transportation system 100 according to the embodiment of the present disclosure can realize the automatic lapping function of the H-frame 301 at least to a certain extent by using the frame insertion device 10, so that the multistage continuous transportation system 100 at least has the functions of excavation, transportation and automatic lapping of the H-frame, that is, the multistage continuous transportation system 100 is a multi-functional multistage continuous transportation system. In some embodiments, the multistage continuous transportation system 100 further includes a connecting oil cylinder (not shown in the figure). The connecting oil cylinder includes a cylinder body and a piston rod. The piston rod extends in the length direction of the second belt conveyor 5, the piston rod is inserted in the cylinder body, the cylinder body is connected with the second end 52 of the second belt conveyor 5, and the piston rod is connected with the frame body 101. Therefore, the overall movement of the frame body 101 can be driven by the movement of the piston rod relative to the cylinder body, thereby realizing the adjustment of a distance between two H-frames 201, and thus improving the consistency of the overall structure of the support frame 20. In some embodiments, the frame body 101 is hinged with the second end 52 of the second belt conveyor 5 through a pin. Therefore, it is convenient for the second end 52 of the second belt conveyor 5 to drive the frame insertion device 10 to move together. As shown in Figs. 9-15, the frame insertion device 10 includes a frame body 101, an H-frame mounting bracket 102, a first tube guide rail 103, a second tube guide rail 104, a first tube gripping manipulator 105, a second tube gripping manipulator 106, a first tube drive, a second tube drive 107 and a carrier roller mounting bracket 109. The frame body 101 is provided with an upper carrier roller 1013 and a lower carrier roller for the frame body. The second belt conveyor 5 includes a rack and a second belt, the second belt has a forward portion and a backward portion, and the forward portion is located above the backward portion. The frame body 101 is located between the second end 52 of the second belt conveyor 5 and the lapped H-frame 201. Thus, the upper carrier roller 1013 for the frame body arranged on the frame body 101 can support a corresponding part of the forward portion of the second belt, and the lower carrier roller for the frame body arranged on the frame body 101 can support a corresponding part of the backward portion of the second belt, thus guaranteeing the continuous transportation of the second belt. The H-frame mounting bracket 102 is movably arranged on the frame body 101 in a width direction of the frame body 101, is rotatable relative to the frame body 101, and includes an H-frame positioning portion 1021 for bearing an H-frame 201. A first motor 114 is connected to the H-frame mounting frame 102 to drive the H-frame mounting bracket 102 to rotate. When the H-frame 201 is lapped by the frame insertion device 10, the H-frame 201 can be placed on the H-frame positioning portion 1021 of the H-frame mounting bracket 102 either manually or by a manipulator. In some embodiments, as shown in Fig. 13, the frame insertion device 10 further includes a slide rail 1011 extending in the width direction of the frame body 101. The H-frame mounting bracket 102 includes a guide block 1025 movably fitted within the slide rail 1011 in the width direction of the frame body 101. Therefore, by using the cooperation of the guide block 1025 and the slide rail 1011, the H-frame mounting bracket 102 moves in a predetermined direction, so that the H-frame 201 can be more accurately placed in a preset position of a laneway by using the H-frame mounting bracket 102, which is beneficial to the operational efficiency of the frame insertion device 10. In some embodiments, as shown in Fig. 13, the frame insertion device 10 further includes a driving oil cylinder 110. The driving oil cylinder 110 includes a cylinder body 1101 and a piston rod 1102 movably disposed within the cylinder body 1101 in the width direction of the frame body 101. The cylinder body 1101 is connected with the frame body 101, and the piston rod 1101 is connected with the H-frame mounting bracket 102. Therefore, it is convenient to realize the movement of the H-frame mounting bracket 102 in the width direction of the frame body 101 by using the driving oil cylinder 110, which is beneficial to the operational efficiency of the frame insertion device 10. In some embodiments, as shown in Fig. 9, Fig. 10 and Fig. 13, the H-frame positioning portion 1021 includes a baseplate 1022, a first positioning plate 1023 and a second positioning plate 1024. The baseplate 1022 is arranged on the H-frame mounting bracket 102. The first positioning plate 1023 and the second positioning plate 1024 are arranged on the baseplate 1022 at intervals in the width direction of the frame body 101.

For example, as shown in Fig. 12, the H-frame 201 includes a first pillar 2011, a second pillar 2012 and a beam 2013. One end of the beam 2013 is connected with the first pillar 2011, and the other end of the beam 2013 is connected with the second pillar 2012. As shown in Fig. 10, the first positioning plate 1023 has a first positioning surface 10231 and a first stopping surface 10232 perpendicular to the first positioning surface 10231, and the second positioning plate 1024 has a second positioning surface 10241 and a second stopping surface 10242 perpendicular to the second positioning surface 10241. The first positioning surface 10231 and the second positioning surface 10241 are disposed opposite to each other in the width direction of the frame body 101, and the first stopping surface 10232 and the second stopping surface 10242 are disposed on the same side in the width direction of the baseplate 1022. As shown in Fig. 13, when the H-frame 201 is placed on the H-frame positioning portion 1021, the first pillar 2011 and the second pillar 2012 of the H-frame 201 are positioned and fitted with the first positioning surface 10231 and the second positioning surface 10241 respectively, and the beam 2013 of the H-frame 201 are stopped and fitted with the first stopping surface 10232 and the second stopping surface 10242, thereby realizing the reliable positioning of the H-frame 201 on the H-frame positioning portion 1021. Therefore, reliable positioning of the H-frame 201 on the H-frame positioning portion 1021 is conveniently achieved by using the H-frame positioning portion 1021 to prevent the H-frame 201 from slipping off the H-frame mounting bracket 102 when the H-frame mounting bracket 102 moves in the width direction of the frame body 101, which is beneficial to the operational efficiency of the frame insertion device 10. In addition, as shown in Fig. 9 and Fig. 12, the H-frame 201 further includes U-grooves 2014 arranged on the ends of the first pillar 2011 and the second pillar 2012. Two ends of a tube 202 are fixedly connected with the U-grooves 2014 of the corresponding H-frames 201 respectively, so that the tube 202 is fixed on the H-frame 201. As shown in Fig. 9, the first tube guide rail 103 and the second tube guide rail 104 are arranged on the frame body 101 at intervals in a width direction of the frame body 101. Each of the first tube guide rail 103 and the second tube guide rail 104 extends in a length direction of the frame body 101. The length direction of the frame body 101 is consistent with a front-rear direction, the first tube guide rail 103 is arranged on a left side of the second tube guide rail 104, and each of the first tube guide rail 103 and the second tube guide rail 104 extends in the front-rear direction. In some embodiments, each of the first tube guide rail 103 and the second tube guide rail 104 is provided with a guide groove, and the guide groove extends in the length direction of the frame body 101. For example, as shown in Fig. 11, the first tube guide rail 103 is provided with a first guide groove 1031, and the second tube guide rail 104 is provided with a second guide groove 1041. Thus, a tube 202 placed on the first tube guide rail 103 can be better guided by the first guide groove 1031, and a tube 202 placed on the second tube guide rail 104 can be better guided by the second guide groove 104, so that each tube 202 moves to the H-frame 201 in a preset direction, which is beneficial to the operational efficiency of the insertion frame device 10. As shown in Fig. 9, the first tube gripping manipulator 105 is disposed on the frame body 101 corresponding to the first tube guide rail 103, and the second tube gripping manipulator 106 is disposed on the frame body 101 corresponding to the second tube guide rail 104. A second motor 115 is connected to the first tube gripping manipulator 105 to drive the first tube gripping manipulator 105 to rotate, and a third motor 116 is connected to the second tube gripping manipulator 106 to drive the second tube gripping manipulator 106 to rotate. For example, each of the first tube gripping manipulator 105 and the second tube gripping manipulator 106 includes a swinging arm. One end of the swinging arm is provided with a rod gripping groove, and the other end of the swinging arm is connected with a corresponding motor. The swinging arm is driven by a corresponding motor, so that the tube 202 is grasped by the corresponding rod gripping groove. In some embodiments, as shown in Fig. 11, the frame insertion device 10 further includes a first tube storage rack 111, a second tube storage rack 112, a fourth motor and a fifth motor. Each of the first tube storage rack 111 and the second tube storage rack 112 is rotatably arranged on the frame body 101, and each of the first tube storage rack 111 and the second tube storage rack 112 is provided with a plurality of tube slots for storing the tubes 202. Each of the fourth motor and the fifth motor is arranged on the frame body 101. The fourth motor is connected with the first tube storage rack 111 to drive the first tube storage rack 111 to rotate, and the fifth motor is connected with the second tube storage rack 112 to drive the second tube storage rack 112 to rotate. For example, as shown in Fig. 9, the first tube storage rack 111 is provided with a plurality of first tube slots 1111 uniformly spaced apart from each other in a circumferential direction of the first tube storage rack 111. The second tube storage rack 112 is provided with a plurality of second tube slots 1121 uniformly spaced apart from each other in a circumferential direction of the second tube storage rack 112. Therefore, the tubes 202 for lapping on both sides of the width direction of the H-frame 201 can be stored on the first tube storage rack 111 and the second tube storage rack 112 respectively. When it is necessary to use the first tube gripping manipulator 105 and the second tube gripping manipulator 106, the first tube storage rack 111 is driven by the fourth motor to rotate by a preset angle so that it is convenient for the first tube gripping manipulator 105 to grasp the tube 202 placed on the first tube storage rack 111, and the second tube storage rack 112 is driven by the fifth motor to rotate by a preset angle so that it is convenient for the second tube gripping manipulator 106 to grasp the tube 202 placed on the second tube storage rack 112. Therefore, the first tube gripping manipulator 105 and the second tube gripping manipulator 106 can grasp the corresponding tubes 202 more accurately and conveniently, which is beneficial to the operational efficiency of the frame insertion device 10. The first tube driver is arranged on the frame body 101 corresponding to the first tube guide rail 103, and the second tube driver 107 is arranged on the frame body 101 corresponding to the second tube guide rail 104. Each of the first tube driver and the second tube driver 107 includes a fixed portion, and a telescopic portion for pushing the tube 202 to move in the length direction of the frame body 101. The telescopic portion is movably disposed on the fixed portion in the length direction of the frame body 101, and the fixed portion is connected with the frame body 101. For example, as shown in Fig. 9, the first tube driver is a first oil cylinder, and the second tube driver 107 is a second oil cylinder. A cylinder body of the first oil cylinder constitutes the fixed portion of the first tube driver, and a piston rod of the first oil cylinder constitutes the telescopic portion of the first tube driver. A cylinder body of the second oil cylinder constitutes the fixed portion of the second tube driver 107, and a piston rod of the second oil cylinder constitutes the telescopic portion of the second tube driver 107. The carrier roller mounting bracket 109 is movably arranged on the frame body 101 in the length direction of the frame body 101. The carrier roller mounting bracket 109 is provided with a height-adjustable carrier roller positioning portion 1091 for bearing a carrier roller. In some embodiments, as shown in Fig. 11, the frame insertion device 10 further includes an intermediate sliding support plate 1012 arranged on the frame body 101. The intermediate sliding support plate 1012 is provided with a chute extending in the length direction of the frame body 101. The carrier roller mounting bracket 109 includes a guide plate 1095 movably fitted in the chute in the length direction of the frame body 101. Therefore, the cooperation of the guide plate 1095 and the chute is used to better limit the moving direction of the carrier roller mounting bracket 109, so that the carrier roller mounting bracket 109 can more accurately place the carrier roller at a set position of the tube 202, which is beneficial to the operational efficiency of the frame insertion device 10. In some embodiments, as shown in Fig. 11, the frame insertion device 10 further includes a lead screw 1197, a nut 1196 (a screw nut) and a sixth motor 117. The nut 1196 is connected with the carrier roller mounting bracket 109 and fitted over the lead screw 1197, and the sixth motor 117 is connected with the lead screw. Therefore, the guide plate 1095 is driven by the lead screw 1197, the nut 1196 and the sixth motor 117 to move in the length direction of the frame body 101, which enables the guide plate 1095 to move in the length direction of the frame body 101. In some embodiments, as shown in Figs. 10, 11, 14 and 15, the carrier roller positioning portion 1091 includes a middle portion 1092, a first portion 1093 and a second portion 1094. The middle portion 1092 is arranged on the carrier roller mounting bracket 109, and the first portion 1093 and the second portion 1094 are arranged on the middle portion 1092 at intervals in the width direction of the frame body 101. Each of the first portion 1093 and the second portion 1094 is provided with a limiting slot for cooperating with the carrier roller. For example, as shown in Fig. 11, Fig. 12, Fig. 14 and Fig. 15, the carrier roller assembly

203 includes a first carrier roller 2031, a second carrier roller 2032, a third carrier roller and a carrier roller bracket 2034. The second carrier roller is connected between the first carrier roller 2031 and the second carrier roller 2032 in the width direction of the frame body 101. Each of the first carrier roller 2031, the second carrier roller 2032 and the third carrier roller is rotatably mounted on the carrier roller bracket 2034. The first portion 1093 is provided with a first limiting slot, and the second portion 1094 is provided with a second limiting slot. When the carrier roller assembly 203 is positioned on the carrier roller positioning portion 1091, the middle portion 1092 of the carrier roller bracket 2034 is supported by the middle portion 1092 of the carrier roller positioning portion 1091, a portion of two side portions of the carrier roller bracket 2034 is clamped in a first fitted groove 10931, and the other portion of the two side portions of the carrier roller bracket 2034 is clamped in a second fitted groove 10941, so that the carrier roller assembly 203 is reliably positioned on the carrier roller positioning portion 1091. Thus, it is convenient to realize the reliable positioning of the carrier roller assembly 203 on the carrier roller positioning portion 1091 by using the carrier roller positioning portion 1091. In addition, as shown in Fig. 11, the frame insertion device 10 includes a third oil cylinder 118. The third oil cylinder 118 includes a cylinder body 1181, and a piston rod 1182 movably inserted in the cylinder body 1182 in an up-down direction. The cylinder body 1182 is connected with the guide plate 1095, and one end of the piston rod 1181 is adjacent to the middle portion 1092. Thus, the carrier roller positioning portion 1091 is driven by the third oil cylinder 118 to move up and down. In some embodiments, as shown in Fig. 11, the frame insertion device 10 further includes a carrier roller storage rack 113 arranged on the frame body 101. The carrier roller storage rack 113 includes a first hanging portion and a second hanging portion for matching hooks at both ends of the carrier roller respectively. For example, as shown in Fig. 11, the first hanging portion is a first support rod 1131, and the second hanging portion is a second support rod 1132. The first support rod 1131 and the second support rod 1132 are arranged on the frame body 101 at intervals in the width direction of the frame body 101, and both extend in the length direction of the frame body 101. The carrier roller assembly 203 further includes a first hook and a second hook at opposite ends of the first carrier roller 2031 and the third carrier roller 2033. The first hook of the carrier roller assembly 203 is hung on the first support rod 1131, and the second hook of the carrier roller assembly 203 is hung on the second support rod 1132, whereby the carrier roller assembly 203 is stored on the carrier roller storage rack 113. When the carrier roller mounting bracket 109 is used to install the carrier roller assembly 203, the carrier roller mounting bracket 109 first moves to the carrier roller storage rack 113 in the length direction of the frame body 101, and the carrier roller assembly 203 to be taken by the carrier roller positioning portion 1091 is aligned with the carrier roller positioning portion 1091 in the up-down direction. Then, the carrier roller positioning portion 1091 is raised and the corresponding carrier roller assembly 203 is lifted by the carrier roller positioning portion 1091, so that the carrier roller assembly 203 is removed from the carrier roller storage rack 113. Afterwards, the carrier roller mounting bracket 109 moves in the length direction of the frame body 101 to a position of the tube 202 where the carrier roller needs to be installed. Finally, the carrier roller positioning portion 1091 descends, and hangs and fixes the two hooks of the carrier roller assembly 203 in the corresponding position of the tube 202 during the descending process to complete the installation of the carrier roller assembly 203 on the tube 202. The specific travelling process of the excavation system according to the embodiment of the present disclosure is as follows: the anchor conveyor 2 is used to drive the first belt conveyor 3 to travel in the length direction of the anchor conveyor 2, and the self-moving bridge loader 4 is used to drive the second belt conveyor 5 to travel in the length direction of the self-moving bridge loader 4. When the power of the self-moving bridge loader 4 is insufficient or the environment in the laneway is poor, the second belt conveyor 5 cannot be driven to move only by the self-moving bridge loader 4. In this case, the self-moving belt conveyor is connected with the anchor conveyor 2 through the pin 23 fitted in the first mounting hole and the second mounting hole, so that the second belt conveyor 5 is driven to move by both the anchor conveyor 2 and the self-moving bridge loader 4. As shown in Figs. 9-15, the process of lapping the H-frame 201 by using the frame insertion device 10 according to the embodiment of the present disclosure is as follows: 1) Process of placing H-frame 201: first, the driving oil cylinder 110 drives the H-frame mounting bracket 102 to move in the width direction of the frame body 101 and protrude from one side of the width direction of the frame body 101, for example, the driving oil cylinder 110 drives the H-frame mounting bracket 102 to protrude from the left side of the frame body 101. The H-frame 201 is manually placed on the baseplate 1022 and positioned using the first positioning plate 1023 and the second positioning plate 1024, as shown in Fig. 13. Then, the driving cylinder 110 drives the H-frame mounting bracket 102 to be retracted from the left side of the frame body 101. Afterwards, the first motor 114 drives the H-frame mounting bracket 102 to rotate by a preset angle to erect the H-frame 201 on the baseplate 1022 in the laneway. 2) Process of lapping tube 202: first, the fourth motor drives the first tube storage rack 111 to rotate by a preset angle, and the fifth motor drives the second tube storage rack 112 to rotate by a preset angle. Then, the second motor 115 drives the first tube gripping manipulator 105 to rotate by a preset angle to grasp the tube 202 on the first tube storage rack 111, and the third motor 116 drives the second tube gripping manipulator 106 to rotate by a preset angle to grasp the tube 202 on the second tube storage rack 112. Afterwards, the second motor 115 drives the first tube gripping manipulator 105 to rotate by a preset angle to place the grasped tube 202 on the first guide rail, and the third motor 116 drives the second tube gripping manipulator 106 to rotate by a preset angle to place the grasped tube 202 on the second guide rail. Finally, the piston rod of the first oil cylinder is extended to push the tube 202 on the first guide rail to the H-frame 201, the piston rod of the second oil cylinder is extended to push the tube 202 on the second guide rail to the H-frame 201, and the tube 202 is fixed on the H-frame 201. For example, a pin is manually inserted into the tube 202 and the H-frame 201 to realize the fixing of the tube 202 and the H-frame 201. 3) Process of installing carrier roller assembly 203: first, the sixth motor 117 drives the carrier roller mounting bracket 109 to move in the length direction of the frame body 101, so that the carrier roller positioning portion 1091 is located below the carrier roller assembly stored on the carrier roller storage rack 113. Then, the third oil cylinder 118 drives the carrier roller positioning portion 1091 to move upward, while the carrier roller assembly 203 is positioned on the carrier roller mounting bracket 109, as shown in Fig. 11 and Fig. 13. Afterwards, the sixth motor 117 drives the carrier roller mounting bracket 109 to move in the length direction of the frame body 101, so that the carrier roller assembly 203 on it moves to a position of the tube 202. Finally, the third oil cylinder 118 drives the carrier roller positioning portion 1091 to move downward, so that the first hook and the second hook of the carrier roller assembly 203 are respectively hung on the tubes 202 on the left and right sides of the H-frame 201 and the carrier roller assembly 203 is fixed on the tube 202. For example, the carrier roller assembly 203 and the tube 202 are fixed by manually inserting the pin on the carrier roller assembly 203 and the tube 202. At this point, the lapping connection of the H-frame 201 is completed. The H-frame 201 lapped by the frame insertion device 10 according to the embodiment of the present disclosure is provided with an H-frame lower carrier roller 204. Thus, it is only necessary to install the carrier roller assembly 203 by using the frame insertion device 10, and the installed carrier roller assembly 203 is located above the H-frame lower carrier roller 204. Therefore, the carrier roller assembly 203 is used to support the corresponding part of the forward portion of the second belt, and the H-frame lower carrier roller 204 is used to support the corresponding part of the backward portion of the second belt. In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "on", "below", "front", "rear, "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", or the like are based on the orientation or positional relationships shown in the drawings, which are only for convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, to be constructed and operated in a particular orientation, and therefore should not be construed as a limitation of the present disclosure. In addition, the terms "first" and "second" are only used for purposes of description, and are not intended to indicate or imply relative importance or to imply the number of indicated technical features. Thus, the feature defined with "first" or "second" may expressly or implicitly include at least one of this feature. In the description of the present disclosure, "a plurality of' means at least two, for example two, three, etc., unless specified otherwise. In the present disclosure, unless specified or limited otherwise, the terms "mounted",

"connected", "coupled", "fixed" and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical connections or electrical connections or may communicate with each other; may be direct connections or indirect connections via an intervening medium, may also be inner communications of two elements or the interaction relationship between the two elements, unless specified otherwise. The specific meanings of the above terms in the present disclosure can be understood by those skilled in the art according to specific situations. In the present disclosure, unless specified or limited otherwise, a structure in which a first feature is "on" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are contacted via an intermediary medium. Furthermore, a first feature "on," "above," or "on top of' a second feature may include an embodiment in which the first feature is right or obliquely "on," "above," or "on top of' the second feature, or just means that the first feature is at a height higher than that of the second feature. A first feature "below," "under," or "on bottom of' a second feature may include an embodiment in which the first feature is right or obliquely "below," "under," or "on bottom of' the second feature, or just means that the first feature is at a height lower than that of the second feature. Reference throughout this specification to "an embodiment," "some embodiments," "an example," "a specific example," or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The appearances of the phrases in various places throughout this specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples and the features in the different embodiments or examples described in this specification without being mutually inconsistent. Although explanatory embodiments of the present disclosure have been shown and described above, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present disclosure, and changes, modifications, alternatives and variations can be made in the embodiments without departing from scope of the present disclosure.

Claims (12)

What is claimed is:

1. A multistage continuous transportation system, comprising:

an excavation device having a first end and a second end opposite to each other in a

length direction thereof;

an anchor conveyor, on which the second end of the excavation device is lapped, the

anchor conveyor having a first end and a second end opposite to each other in a length

direction thereof;

a first belt conveyor having a first end and a second end opposite to each other in a

length direction thereof, wherein the first belt conveyor comprises a loading portion at the

first end thereof and an unloading portion at the second end thereof, the loading portion is

connected with the second end of the anchor conveyor, and a first traveling wheel assembly is

provided at a lower end of the unloading portion and comprises a first holder mounted on the

unloading portion and a first traveling wheel mounted on the first holder;

a self-moving bridge loader, wherein the first traveling wheel is lapped on the

self-moving bridge loader so that the first belt conveyor moves in a length direction of the

self-moving bridge loader, the self-moving bridge loader has a first end and a second end

opposite to each other in a length direction thereof, and a second traveling wheel assembly is

provided at the second end of the self-moving bridge loader and comprises a second holder

mounted on the second end of the self-moving bridge loader and a second traveling wheel

mounted on the second holder; and

a second belt conveyor, wherein the second traveling wheel is lapped on the second belt

conveyor so that the self-moving bridge loader moves in a length direction of the second belt

conveyor, the second belt conveyor has a first end and a second end opposite to each other in

a length direction thereof, and the first end of the second belt conveyor is connected with the

self-moving bridge loader to enable the self-moving bridge loader to drive the second belt

conveyor to move.

2. The multistage continuous transportation system of claim 1, wherein the first belt

conveyor is a horizontal bendable belt conveyor that is bendable in a horizontal direction.

3. The multistage continuous transportation system of claim 1 or 2, wherein the second

belt conveyor is a retractable belt conveyor with adjustable length.

4. The multistage continuous transportation system of claim 3, further comprising: a ventilation and dust removal system comprising a first fixed air duct, a second fixed air duct and a retractable air duct, wherein the first fixed air duct is connected to the first belt conveyor, the second fixed air duct is connected to the self-moving bridge loader, the retractable air duct is arranged between the first fixed air duct and the second fixed air duct, one end of the retractable air duct is connected with the first fixed air duct, and the other end of the retractable air duct is connected with the second fixed air duct.

5. The multistage continuous transportation system of claim 4, wherein a first bracket is provided at a lower end of the first fixed air duct and connected with a rack of the first belt conveyor via a bolt, and a second bracket is provided at a lower end of the second fixed air duct and connected with a rack of the self-moving bridge loader.

6. The multistage continuous transportation system according to any one of claims 1-5, wherein the loading portion is hinged with the second end of the anchor conveyor through a pin.

7. The multistage continuous transportation system according to any one of claims 1-6, wherein a first connection hole is formed in the first end of the self-moving bridge loader, a second connection hole is formed in the anchor conveyor, and the first end of the self-moving bridge loader is connected with the anchor conveyor through a pin fitted in the first connection hole and the second connection hole.

8. The multistage continuous transportation system according to any one of claims 1-7, wherein the first end of the second belt conveyor is connected with the self-moving bridge loader through a traction winch.

9. The multistage continuous transportation system according to any one of claims 1-8, wherein a paving device is provided on the first end of the second belt conveyor.

10. The multistage continuous transportation system according to any one of claims 2-9, further comprising a frame insertion device, wherein the frame insertion device comprises: a frame body connected with the second end of the second belt conveyor, wherein the frame body is provided with an upper carrier roller and a lower carrier roller for the frame body; an H-frame mounting bracket movably arranged on the frame body in a width direction of the frame body, rotatable relative to the frame body, and comprising an H-frame positioning portion for bearing an H-frame, wherein a first motor is connected to the H-frame mounting bracket to drive the H-frame mounting bracket to rotate; a first tube guide rail and a second tube guide rail arranged on the frame body at intervals in the width direction of the frame body, wherein each of the first tube guide rail and the second tube guide rail extends in a length direction of the frame body; a first tube gripping manipulator and a second tube gripping manipulator, wherein the first tube gripping manipulator is disposed on the frame body corresponding to the first tube guide rail, the second tube gripping manipulator is disposed on the frame body corresponding to the second tube guide rail, a second motor is connected to the first tube gripping manipulator to drive the first tube gripping manipulator to rotate, and a third motor is connected to the second tube gripping manipulator to drive the second tube gripping manipulator to rotate; a first tube driver and a second tube driver, wherein the first tube driver is disposed on the frame body corresponding to the first tube guide rail, the second tube driver is disposed on the frame body corresponding to the second tube guide rail, each of the first tube driver and the second tube driver comprises a fixed portion and a telescopic portion for pushing a tube to move in the length direction of the frame body, the telescopic portion is movably disposed on the fixed portion in the length direction of the frame body, and the fixed portion is connected with the frame body; and a carrier roller mounting bracket movably arranged on the frame body in the length direction of the frame body, and comprising a height-adjustable carrier roller positioning portion for bearing a carrier roller.

11. The multistage continuous transportation system of claim 10, further comprising: a connecting oil cylinder comprising a cylinder body and a piston rod, wherein the piston rod extends in the length direction of the second belt conveyor and is inserted in the cylinder body and connected with the frame body, and the cylinder body is connected with the second end of the second belt conveyor.

12. The multistage continuous transportation system of claim 10 or 11, wherein the frame body is hinged with the second end of the second belt conveyor through a pin.