Stepping type telescopic loading and transporting integrated transporter and working method thereof

Abstract

The invention discloses a stepping type telescopic loading and transporting integrated conveyor and a working method thereof.The stepping type telescopic loading and transporting integrated conveyor comprises a crawling seat, a scraper transporting device and a loading device, the scraper transporting device is movably arranged on the crawling seat, and a crawling driving mechanism is arranged between the scraper transporting device and the crawling seat; the scraper conveying device is provided with a lifting driving mechanism; the loading device is movably arranged at one end of the scraper conveying device, and a telescopic driving mechanism and a pitching driving mechanism are arranged between the loading device and the scraper conveying device. According to the invention, stepping walking and loading and transporting functions are integrated together, mechanical mining and transportation of coal are realized, the coal mining and transporting vehicle can advance and retreat in a coal mine tunnel, the operation is flexible and convenient, the coal mining and transporting vehicle can adapt to complex working conditions of a coal mine, the operation is safe and reliable, the labor intensity of operators can be effectively reduced, and the working efficiency of coal mining and the safety of coal mining are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine transportation equipment, and in particular relates to a step-type telescopic loading and transporting integrated conveyor and a working method thereof. Background Art

[0002] Scraper conveyor is a kind of conveying equipment widely used in industry, mainly used to convey bulk materials on horizontal or inclined planes. It has the advantages of simple structure, reliable operation, convenient maintenance and low cost, and is suitable for a variety of industrial occasions, such as coal mining, metallurgy, building materials, chemical industry and other industries. In mechanized coal mining, scraper conveyor is widely used. Although it can improve coal mining production efficiency and increase coal output to a certain extent, it also has certain defects.

[0003] Movement defects of scraper conveyor: When the scraper conveyor needs to be extended or shortened on site, the following methods are adopted: Forward: The method adopted is to disconnect the chain, add the middle chute that needs to be extended between the tail and the middle trough, extend it section by section, and finally connect the chain to complete the extension. Until it is extended to the longest length allowed by the conveyor, the conveyor is dismantled and shortened to the shortest allowable length at one time, and then it is extended section by section to the longest allowable length, and then it is extended section by section to the longest allowable length, and it is repeated. Backward: The method adopted is to disconnect the chain, add the middle chute that needs to be shortened between the tail and the middle trough, remove it section by section, and finally connect the chain to complete the shortening. Until it is shortened to the shortest length allowed by the conveyor, the conveyor is dismantled and extended to the longest allowable length at one time, and then it is shortened section by section to the shortest allowable length, and it is repeated. The forward and backward operations of this method are not flexible, and the replacement time is long, which seriously restricts the production efficiency of coal.

[0004] Loading defects: The current loading method is to use divisional cooperation. The scraper conveyor does not have the loading function, and the following cooperation is required: 1. Manual loading; 2. Loading by scraper and conveyor; 3. Loading by scraper and conveyor. This method has a low degree of mechanization, is troublesome to operate, has high labor intensity for operators, and has poor safety.

[0005] Therefore, providing a transport machine with walking and loading functions has become an urgent problem to be solved in the current industry. Summary of the invention

[0006] The object of the present invention is to provide a walking-type telescopic integrated loading and transporting conveyor and a working method thereof, so as to solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above-mentioned objectives, in the first aspect, the present invention adopts the following technical scheme: a walking type retractable loading and transporting integrated conveyor, comprising a crawling seat, a scraper conveying device and a loading device, wherein the scraper conveying device is movably arranged on the crawling seat, a crawling drive mechanism is arranged between the scraper conveying device and the crawling seat, and the scraper conveying device is equipped with a lifting drive mechanism, and the movable end of the lifting drive mechanism can be extended and contacted with the ground, thereby lifting the crawling seat above the ground; the loading device is movably arranged at one end of the scraper conveying device, and a telescopic drive mechanism and a pitching drive mechanism are arranged between the loading device and the scraper conveying device.

[0008] As an optional implementation of the above technical solution, the loading device includes a bucket, a guide groove penetrating the bucket is provided in the middle of the bucket, star wheels are provided on both sides of the guide groove, and one end of the scraper conveyor extends into the guide groove.

[0009] As an optional implementation of the above technical solution, the scraper transport device is provided with a feed trough, a connecting trough, a base trough, a flat trough, a lower curved trough, a transition trough, an upper curved trough, a telescopic trough and a discharge trough which are connected in sequence, and the side plate of the connecting trough is hinged to the side plate of the base trough.

[0010] As an optional implementation of the above technical solution, material guide plates are provided on both sides of the bucket, the material guide plates are equipped with reinforcing rib plates, and slide rails are provided between the material guide plates and the bucket.

[0011] As an optional implementation of the above technical solution, the crawling drive mechanism includes a front crawling cylinder and a rear crawling cylinder, the front crawling cylinder is arranged between the front end of the crawling seat and the scraper transport device, and the rear crawling cylinder is arranged between the rear end of the crawling seat and the scraper transport device.

[0012] As an optional implementation of the above technical solution, the lifting drive mechanism includes a first lifting cylinder, a second lifting cylinder and a third lifting cylinder, and the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are all arranged on the scraper conveyor. After the movable ends of the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are retracted, the crawling seat contacts the ground; after the movable ends of the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are extended, they can contact the ground, thereby lifting the crawling seat above the ground.

[0013] As an optional implementation of the above technical solution, a sewage discharge device is provided at one end of the scraper transport device close to the loading device, a crawler is provided at the other end of the scraper transport device, and the first lifting cylinder is arranged on the sewage discharge device.

[0014] As an optional implementation of the above technical solution, the crawling seat includes a foundation trench base and a flat trench base that are connected to each other, the foundation trench base is provided with a first strip hole that slides with the second lifting cylinder, and the flat trench base is provided with a second strip hole that slides with the third lifting cylinder.

[0015] As an optional implementation of the above technical solution, the telescopic drive mechanism includes a telescopic cylinder, one end of the telescopic cylinder is connected to the scraper transport device, and the other end of the telescopic cylinder is connected to the loading device.

[0016] As an optional implementation of the above technical solution, the pitch drive mechanism includes a pitch cylinder, one end of the pitch cylinder is connected to the scraper conveyor device, and the other end of the pitch cylinder is connected to the loading device.

[0017] In a second aspect, the present invention adopts the following technical solution: a working method of a step-type telescopic loading and transporting integrated transporter, comprising:

[0018] Step process:

[0019] Step A, the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are all retracted to a minimum stroke state, and the crawler seat is in contact with the ground;

[0020] Step B: The front crawling cylinder and the rear crawling cylinder work synchronously, the front crawling cylinder gradually extends to the maximum stroke state, and the rear crawling cylinder gradually contracts to the minimum stroke state. The scraper transport device is supported by the crawling seat, and the front crawling cylinder and the rear crawling cylinder push the scraper transport device and the loading device to slide forward;

[0021] Step C, after the scraper conveyor and the loading device slide forward for a certain distance, the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are gradually extended to the maximum stroke state and contact the ground, so that the crawling seat gradually leaves the ground;

[0022] Step D, the front crawling cylinder and the rear crawling cylinder work synchronously, the front crawling cylinder gradually contracts to the minimum stroke state and the rear crawling cylinder gradually extends to the maximum stroke state, the crawling seat is supported by the scraper transport device, and the front crawling cylinder and the rear crawling cylinder push the crawling seat to slide forward;

[0023] Step E: After the crawling seat slides forward for a certain distance, the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are gradually retracted to the minimum stroke state, so that the crawling seat contacts the ground, completing a cycle of the stepping process;

[0024] Telescopic and pitching process: When the telescopic cylinder pushes the bucket to extend forward or retract backward, the telescopic slot of the scraper conveyor and the telescopic cylinder work synchronously. When the telescopic cylinder extends, the telescopic slot contracts synchronously; when the telescopic cylinder contracts, the telescopic slot extends synchronously, so that the chain of the scraper conveyor is always in a tensioned state; the pitching cylinder drives the bucket to pitch up and down to clean the ground and collect materials in a larger range;

[0025] Loading and transporting process: The materials are collected into the feed trough of the scraper conveyor through the star wheel on the bucket, and the scraper of the scraper conveyor carries the materials along the feed trough, connecting trough, base trough, flat trough, lower curved trough, transition trough, upper curved trough, telescopic trough and discharge trough to carry out uninterrupted loading and transporting work.

[0026] The beneficial effects of the present invention are:

[0027] The present invention integrates the walking and loading functions to realize the mechanized mining and transportation of coal. It can move forward and backward in the coal mine tunnels. It is flexible and convenient to operate, can adapt to the complex working conditions of the coal mine, and has safe and reliable operations. It can effectively reduce the labor intensity of operators and improve the work efficiency and safety of coal mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a step-type telescopic loading and transporting integrated transporter in one embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of a loading device in one embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the layout structure of the second lifting cylinder and the third lifting cylinder in one embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the layout structure of the rear end crawling cylinder in one embodiment of the present invention.

[0032] In the figure: 1-scraper transport device; 2-loading device; 3-bucket; 4-star wheel; 5-feeding trough; 6-connecting trough; 7-base trough; 8-flat trough; 9-lower curved trough; 10-transition trough; 11-upper curved trough; 12-telescopic trough; 13-discharging trough; 14-slide rail; 15-guide plate; 16-front crawling cylinder; 17-rear crawling cylinder; 18-first lifting cylinder; 19-second lifting cylinder; 20-third lifting cylinder; 21-draining device; 22-crawler; 23-digging trench base; 24-flat trough base; 25-second strip hole; 26-telescopic cylinder; 27-pitch cylinder; 28-ground. DETAILED DESCRIPTION

[0033] like Figure 1-Figure 4 As shown, this embodiment provides a walking type telescopic loading and transporting integrated conveyor, which is mainly used in coal mining work, and can greatly improve coal mining production efficiency and increase coal production. The walking type telescopic loading and transporting integrated conveyor includes a crawling seat, a scraper conveying device 1 and a loading device 2. The scraper conveying device 1 is movably arranged on the crawling seat, and a crawling drive mechanism is arranged between the scraper conveying device 1 and the crawling seat. The crawling drive mechanism is used to drive the scraper conveying device 1 to slide forward and backward along the crawling seat, which is conducive to the walking movement of the walking type telescopic loading and transporting integrated conveyor.

[0034] The scraper conveyor 1 is equipped with a lifting drive mechanism, the movable end of which can be extended and contacted with the ground 28, thereby lifting the crawling seat above the ground 28. After the movable end of the lifting drive mechanism is retracted, the crawling seat contacts the ground 28 and provides support for the scraper conveyor 1.

[0035] The loading device 2 is movably arranged at one end of the scraper conveyor 1, and a telescopic drive mechanism and a pitching drive mechanism are arranged between the loading device 2 and the scraper conveyor 1. By adjusting the position of the loading device 2 by the telescopic drive mechanism and the pitching drive mechanism, materials in a larger range can be collected and transported to achieve higher conveying efficiency.

[0036] The present invention integrates the walking and loading functions to realize the mechanized mining and transportation of coal. It can move forward and backward in the coal mine tunnels. It is flexible and convenient to operate, can adapt to the complex working conditions of the coal mine, and has safe and reliable operations. It can effectively reduce the labor intensity of operators and improve the work efficiency and safety of coal mining.

[0037] like Figure 2 As shown, specifically, the loading device 2 includes a bucket 3, a guide groove penetrating the bucket 3 is provided in the middle of the bucket 3, star wheels 4 are provided on both sides of the guide groove, and one end of the scraper conveyor 1 extends into the guide groove. Guide plates 15 are provided on both sides of the bucket 3, and the guide plates 15 are equipped with reinforcing rib plates. A slide rail 14 is provided between the guide plate 15 and the bucket 3, and the guide plate 15 can slide and fine-tune 0.4 meters to both ends through the slide rail 14. When the star wheel 4 rotates, it can collect nearby materials onto the scraper conveyor 1, which is convenient for material transportation.

[0038] like Figure 1As shown, the scraper conveyor 1 is provided with a feed trough 5, a connecting trough 6, a base trough 7, a flat trough 8, a lower curved trough 9, a transition trough 10, an upper curved trough 11, a telescopic trough 12 and a discharge trough 13 which are connected in sequence, and the side plate of the connecting trough 6 is hinged with the side plate of the base trough 7. When the telescopic drive mechanism and the pitch drive mechanism adjust the position of the bucket 3, the side plate of the connecting trough 6 and the side plate of the base trough 7 rotate relative to each other, so that the material can be smoothly transported along the scraper conveyor 1.

[0039] In a specific embodiment, the crawling drive mechanism includes a front crawling cylinder 16 and a rear crawling cylinder 17, wherein the front crawling cylinder 16 is arranged between the front end of the crawling seat and the scraper conveyor 1, and the rear crawling cylinder 17 is arranged between the rear end of the crawling seat and the scraper conveyor 1. The crawling seat includes a trenching base 23 and a flat groove base 24 connected to each other, and the trenching base 23 and the flat groove base 24 rely on the extension parts on both sides as the guide components of the scraper conveyor 1. The front crawling cylinder 16 is arranged between the trenching base 23 and the scraper conveyor 1, and the rear crawling cylinder 17 is arranged between the flat groove base 24 and the scraper conveyor 1. The front crawling cylinder 16 and the rear crawling cylinder 17 move synchronously to realize the sliding function of the scraper conveyor 1 relative to the crawling seat.

[0040] like Figure 2 , Figure 3 and Figure 4 As shown, in a specific embodiment, the lifting drive mechanism includes a first lifting cylinder 18, a second lifting cylinder 19 and a third lifting cylinder 20, and the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 are all arranged on the scraper conveyor 1. After the movable ends of the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 are retracted, the crawling seat contacts the ground 28; after the movable ends of the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 are extended, they can contact the ground 28, thereby lifting the crawling seat above the ground 28. The end of the scraper conveyor 1 close to the loading device 2 is provided with a sewage discharge device 21, and the other end of the scraper conveyor 1 is provided with a crawler 22, and the first lifting cylinder 18 is arranged on the sewage discharge device 21.

[0041] The trench base 23 is provided with a first strip hole that is slidably matched with the second lifting cylinder 19, and the flat groove base 24 is provided with a second strip hole 25 that is slidably matched with the third lifting cylinder 20. The second lifting cylinder 19 can slide along the first strip hole, and the movable end of the second lifting cylinder 19 can pass through the first strip hole to contact the ground 28; the third lifting cylinder 20 can slide along the second strip hole 25, and the movable end of the third lifting cylinder 20 can pass through the second strip hole 25 to contact the ground 28, so that the crawling seat and the scraper conveyor 1 can alternately contact the ground 28 and realize the crawling function.

[0042] like Figure 1 As shown, in a specific embodiment, the telescopic drive mechanism includes a telescopic cylinder 26, one end of which is connected to the sewage discharge device 21, and the other end of which is connected to the bucket 3. The pitch drive mechanism includes a pitch cylinder 27, one end of which is connected to the sewage discharge device 21, and the other end of which is connected to the bucket 3. The bucket 3 is driven to extend forward or retract backward by the telescopic cylinder 26, and the pitch angle of the bucket 3 is adjusted by the pitch cylinder 27, which is conducive to improving the loading range of the bucket 3.

[0043] This embodiment also provides a working method of the above-mentioned walking type telescopic loading and transporting integrated transport machine, and the working method includes a walking process, a telescopic pitch process and a loading process.

[0044] The stepping process includes:

[0045] Step A, the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 are all retracted to the minimum stroke state, and the crawling seat is in contact with the ground 28;

[0046] Step B, the front crawling cylinder 16 and the rear crawling cylinder 17 work synchronously, the front crawling cylinder 16 gradually extends to the maximum stroke state, and the rear crawling cylinder 17 gradually contracts to the minimum stroke state. The scraper conveyor 1 is supported by the crawling seat, and the front crawling cylinder 16 and the rear crawling cylinder 17 push the scraper conveyor 1 and the loading device 2 to slide forward;

[0047] Step C, after the scraper conveyor 1 and the loading device 2 slide forward for a certain distance, the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 are gradually extended to the maximum stroke state and contact the ground 28, so that the crawling seat gradually leaves the ground 28;

[0048] Step D, the front crawling cylinder 16 and the rear crawling cylinder 17 work synchronously, the front crawling cylinder 16 gradually contracts to the minimum stroke state and the rear crawling cylinder 17 gradually extends to the maximum stroke state, the crawling seat is supported by the scraper conveyor 1, and the front crawling cylinder 16 and the rear crawling cylinder 17 push the crawling seat to slide forward;

[0049] Step E: After the crawling seat slides forward for a certain distance, the first lifting cylinder 18, the second lifting cylinder 19 and the third lifting cylinder 20 gradually shrink to the minimum stroke state, so that the crawling seat contacts the ground 28, completing a cycle of the stepping process.

[0050] The walking type retractable loading and transporting integrated conveyor can achieve the purpose of automatic walking through a cyclic walking process.

[0051] After the walking process is completed, the whole device performs the excavation task. After the materials near this walking type telescopic loading and transporting integrated conveyor are collected, the materials in a larger range can be collected and transported through the telescopic pitching process to achieve higher transportation efficiency. Specifically, the telescopic pitching process includes: when the telescopic cylinder 26 pushes the bucket 3 to extend forward or retract backward, the telescopic slot 12 of the scraper conveyor 1 works synchronously with the telescopic cylinder 26. The bucket 3 can move along the feed trough 5. When the telescopic cylinder 26 extends, the telescopic slot 12 shrinks synchronously; when the telescopic cylinder 26 shrinks, the telescopic slot 12 extends synchronously, so that the chain of the scraper conveyor 1 is always in a tensioned state; the pitching cylinder 27 drives the bucket 3 to pitch up and down to clean the ground 28 and collect materials in a larger range. After the collection and transportation of materials around the current bucket 3 is completed, the telescopic cylinder 26 and the pitching cylinder 27 shrink to prepare for the walking process.

[0052] The loading and transporting process includes: collecting materials into the feed trough 5 of the scraper transport device 1 through the star wheel 4 on the bucket 3, and using the scraper of the scraper transport device 1 to carry the materials along the feed trough 5, the connecting trough 6, the base trough 7, the flat trough 8, the lower curved trough 9, the transition trough 10, the upper curved trough 11, the telescopic trough 12 and the discharge trough 13 to carry out uninterrupted loading and transporting work. The feed trough 5, the connecting trough 6 and the base trough 7 are of the same size, specification and height, and the double center chain and scraper of the scraper transport device 1 are throughout. Driven by the active sprocket and the driven sprocket of the scraper transport device 1, the scraper moves from front to back at the top of the feed trough 5, and from front to back to front at the bottom of the feed trough 5, and the material loading process is realized through continuous cyclic motion.

[0053] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. A walking type retractable loading and transporting integrated transport machine, characterized in that: The invention comprises a crawling seat, a scraper transport device (1) and a loading device (2), wherein the scraper transport device (1) is movably arranged on the crawling seat, a crawling drive mechanism is arranged between the scraper transport device (1) and the crawling seat, and the scraper transport device (1) is equipped with a lifting drive mechanism, wherein the movable end of the lifting drive mechanism can be extended and contact the ground (28), thereby lifting the crawling seat above the ground (28); the loading device (2) is movably arranged at one end of the scraper transport device (1), and a telescopic drive mechanism and a pitching drive mechanism are arranged between the loading device (2) and the scraper transport device (1).

2. The walking type retractable loading and transporting integrated transporter according to claim 1, characterized in that: The loading device (2) comprises a bucket (3), a guide groove penetrating the bucket (3) is provided in the middle of the bucket (3), star wheels (4) are provided on both sides of the guide groove, and one end of the scraper transport device (1) extends into the guide groove.

3. The walking type telescopic loading and transporting integrated transporter according to claim 2, characterized in that: The scraper conveyor (1) is provided with a feed trough (5), a connecting trough (6), a base trough (7), a flat trough (8), a lower curved trough (9), a transition trough (10), an upper curved trough (11), a telescopic trough (12) and a discharge trough (13) which are connected in sequence, and a side plate of the connecting trough (6) is hinged to a side plate of the base trough (7).

4. The walking type telescopic loading and transporting integrated transporter according to claim 2, characterized in that: A material guide plate (15) is provided on both sides of the bucket (3), the material guide plate (15) is equipped with a reinforcing rib plate, and a slide rail (14) is provided between the material guide plate (15) and the bucket (3).

5. The walking type telescopic loading and transporting integrated transporter according to claim 1, characterized in that: The crawling drive mechanism comprises a front crawling cylinder (16) and a rear crawling cylinder (17); the front crawling cylinder (16) is arranged between the front end of the crawling seat and the scraper conveyor (1); and the rear crawling cylinder (17) is arranged between the rear end of the crawling seat and the scraper conveyor (1).

6. The walking type telescopic loading and transporting integrated transporter according to claim 1, characterized in that: The lifting drive mechanism comprises a first lifting cylinder (18), a second lifting cylinder (19) and a third lifting cylinder (20). The first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are all arranged on the scraper conveyor (1). When the movable ends of the first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are retracted, the crawling seat contacts the ground (28); when the movable ends of the first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are extended, they contact the ground (28), thereby lifting the crawling seat above the ground (28).

7. The walking type telescopic loading and transporting integrated transporter according to claim 6, characterized in that: A sewage discharge device (21) is provided at one end of the scraper transport device (1) close to the loading device (2), a crawler belt (22) is provided at the other end of the scraper transport device (1), and the first lifting cylinder (18) is arranged on the sewage discharge device (21).

8. The walking type telescopic loading and transporting integrated transporter according to claim 6, characterized in that: The crawling seat comprises a foundation trench base (23) and a flat groove base (24) which are connected to each other, the foundation trench base (23) is provided with a first strip hole which is slidably matched with the second lifting cylinder (19), and the flat groove base (24) is provided with a second strip hole (25) which is slidably matched with the third lifting cylinder (20).

9. The walking type telescopic loading and transporting integrated transporter according to claim 1, characterized in that: The telescopic drive mechanism comprises a telescopic cylinder (26), one end of which is connected to the scraper transport device (1), and the other end of which is connected to the loading device (2); the pitch drive mechanism comprises a pitch cylinder (27), one end of which is connected to the scraper transport device (1), and the other end of which is connected to the loading device (2).

10. A method for operating a walking-type retractable integrated loading and transporting conveyor, characterized in that: include: Step process: Step A, the first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are all retracted to a minimum stroke state, and the crawling seat is in contact with the ground (28); Step B, the front crawling cylinder (16) and the rear crawling cylinder (17) work synchronously, the front crawling cylinder (16) gradually extends to the maximum stroke state, and the rear crawling cylinder (17) gradually contracts to the minimum stroke state, the scraper conveyor (1) is supported by the crawling seat, and the front crawling cylinder (16) and the rear crawling cylinder (17) push the scraper conveyor (1) and the loading device (2) to slide forward; Step C, after the scraper transport device (1) and the loading device (2) slide forward for a certain distance, the first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are gradually extended to the maximum stroke state and contact the ground (28), so that the crawling seat gradually leaves the ground (28); Step D, the front crawling cylinder (16) and the rear crawling cylinder (17) work synchronously, the front crawling cylinder (16) gradually contracts to the minimum stroke state and the rear crawling cylinder (17) gradually extends to the maximum stroke state, the crawling seat is supported by the scraper conveyor (1), and the front crawling cylinder (16) and the rear crawling cylinder (17) push the crawling seat to slide forward; Step E: After the crawling seat slides forward for a certain distance, the first lifting cylinder (18), the second lifting cylinder (19) and the third lifting cylinder (20) are gradually retracted to a minimum stroke state, so that the crawling seat contacts the ground (28), completing a cycle of the stepping process; Telescopic and pitching process: when the telescopic cylinder (26) pushes the bucket (3) to extend forward or retract backward, the telescopic slot (12) of the scraper conveyor (1) and the telescopic cylinder (26) work synchronously. When the telescopic cylinder (26) extends, the telescopic slot (12) contracts synchronously; when the telescopic cylinder (26) contracts, the telescopic slot (12) extends synchronously, so that the chain of the scraper conveyor (1) is always kept in a tensioned state; the pitching cylinder (27) drives the bucket (3) to perform up and down pitching activities, so as to clean the ground (28) and collect materials in a larger range; Loading and transporting process: The star wheel (4) on the bucket (3) collects the materials into the feed trough (5) of the scraper transport device (1), and the scraper of the scraper transport device (1) carries the materials along the feed trough (5), the connecting trough (6), the base trough (7), the flat trough (8), the lower curved trough (9), the transition trough (10), the upper curved trough (11), the telescopic trough (12) and the discharge trough (13) to perform uninterrupted loading and transporting work.

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