Chute roller screening, crushing and transporting device

Abstract

A chute roller-type screening, crushing and transporting device relates to the technical field of coal mine mining and conveying equipment. It is connected to the head of a transfer machine and the tail of a belt conveyor, and includes a screening device and a crushing device. Both are located directly above the tail of the belt conveyor and are located at the end of the head of the transfer machine. The head of the transfer machine, the screening device and the crushing device are connected in sequence; the crushing device includes a scraper chain assembly, a trough body and a scraper chain power unit. The crushing device has its own transport mechanism, and the raw coal is transported and crushed by the crushing device itself. The screening device is directly set above the tail of the belt conveyor. The small pieces of raw coal after screening directly pass through the screening device vertically and fall on the tail of the belt conveyor for transportation. There is no need to pass through the transfer machine vertically again, so that the scraper of the transfer machine cannot touch the small pieces of raw coal after screening at all, and the small pieces of raw coal will not be sheared and crushed twice. While having the screening function, it can also relatively increase the lump coal rate.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine mining and conveying equipment, and in particular to a chute roller type screening, crushing and transporting device. Background Art

[0002] After the raw coal is mined, it is unloaded via a scraper conveyor to a transfer machine equipped with a crusher for crushing and transfer, and then unloaded onto a belt conveyor. Because the mined raw coal is of different sizes, the raw coal is not screened and separated but all crushed by the crusher. While the large pieces of raw coal are crushed, some small pieces of raw coal are also crushed by the crusher into foam coal, resulting in a significant reduction in the lump coal rate.

[0003] In response to the above problems, in order to increase the lump coal rate, some coal companies have improved the crushing and transferring machines, adding a screening trough with screening holes to the suspended section of the traditional transfer machine. The screening trough is sequentially connected to the crusher, and is arranged vertically with the transfer machine and belt conveyor in sequence. A drop hole is opened on the trough body of the transfer machine directly below the screening trough. It can be seen that this screening and crushing method is as follows: the transfer machine transports the raw coal to the screening trough, and the large pieces of raw coal move along the screening trough to the transfer machine close to the crusher. The transfer machine then transports the large pieces of raw coal to the bottom of the crusher for crushing; the small pieces of raw coal pass through the screening trough and the drop hole and fall on the belt conveyor, achieving the purpose of first screening and separating the raw coal, and then crushing the large pieces of raw coal after screening. This method significantly improves the lump coal rate compared to before the improvement.

[0004] However, the scraper chain of the transfer machine is always running in a closed loop. When small pieces of raw coal fall near the drop hole, the scrapers of the scraper chain may impact the small pieces of raw coal, causing secondary shearing and crushing of the small pieces of raw coal, which also causes a loss of lump coal rate. Since the crusher needs to rely on the scraper chain of the transfer machine to transfer large pieces of raw coal and the trough of the transfer machine cooperates with the crusher to crush the large pieces of raw coal, and the screening trough can only be located between the transfer machine and the crusher to realize the screening function, the scraper chain must pass horizontally directly under the screening trough. Therefore, on the basis of increasing the screening function, it is necessary to prevent small pieces of raw coal from being sheared and crushed by the scraper for the second time, which is a difficult problem that needs to be solved urgently. Summary of the Invention

[0005] In view of this, it is necessary to provide a chute roller type screening, crushing and transporting device that has both screening function and can realize large-lump raw coal crushing and transport without relying on a transfer machine.

[0006] A chute roller-type screening, crushing and transporting device is connected to the head of a transfer machine and the tail of a belt conveyor, and includes a screening device and a crushing device. Both are located directly above the tail of the belt conveyor and are located at the end of the head of the transfer machine. The head of the transfer machine, the screening device and the crushing device are connected in sequence; the crushing device includes a scraper chain assembly, a trough body and a scraper chain power unit. The scraper chain assembly is located at the upper part of the trough body and is driven to move by the scraper chain power unit to drive the raw coal on the trough body to move.

[0007] Preferably, the screening device includes a driver, a roller, and a screen. The driving end of the driver is fixedly connected to the central axis of the roller to drive the roller to rotate, thereby driving the raw coal on the roller to move. A predetermined number of rollers and screens are provided, and a predetermined number of screens are provided on each roller.

[0008] Preferably, the screening device also includes a support frame and a baffle, the driver is fixed on the support frame, the roller is rotatably connected to the baffle, there are two baffles, which are vertically arranged on opposite sides of the support frame, and the support frame and the trough body are connected to the tail of the belt conveyor, so that the support frame and the trough body can move along the length direction of the tail of the belt conveyor, and thus the screening device and the crushing device can move along the length direction of the tail of the belt conveyor, and the support frame is a frame with a hollow bottom.

[0009] Preferably, the transfer machine head includes an inlet guide plate and a transfer machine trolley, and the inlet guide plate is arranged near the roller; the screening device also includes a push-telescopic rod, one end of the push-telescopic rod is connected to the support frame, and the other end is connected to the transfer machine trolley, so as to extend the push-telescopic rod to drive the support frame to move in the direction away from the transfer machine trolley, and shorten the push-telescopic rod to drive the support frame to move in the direction close to the transfer machine trolley, thereby achieving the extension of the push-telescopic rod to drive the screening device and the crushing device to move in the direction away from the transfer machine trolley, and shorten the push-telescopic rod to drive the screening device and the crushing device to move in the direction close to the transfer machine trolley.

[0010] Preferably, the screening device also includes an outlet material guide plate, a protective side plate, a buffer reinforcement plate, and a material guide inclined plate. The outlet material guide plate is located between the roller and the crushing device and is arranged close to the roller. The opposite ends of the outlet material guide plate are respectively fixedly connected to the two baffles. The protective side plate is located between the baffle and the crushing device, and one end of the protective side plate is connected to the baffle. The buffer reinforcement plate is located directly below the roller and is fixed on the support frame. The material guide inclined plate is located horizontally between the roller and the transfer machine trolley and vertically above the buffer reinforcement plate, and the material guide inclined plate is connected to the support frame.

[0011] Preferably, the crushing device also includes a crushing assembly, which is fixed on the trough body, and the crushing assembly includes a crushing cover, a crushing power unit, a transmission belt, a crushing shaft group, a crushing hammer, an adjusting pad, and a lifting cylinder. The crushing cover is located above the trough body and fixed on the trough body, the output end of the crushing power unit is fixedly connected to the transmission belt, and the transmission belt is fixedly connected to the crushing shaft group to drive the crushing shaft group to rotate through the crushing power unit, the two ends of the crushing shaft group are located outside the crushing cover and the middle is located inside the crushing cover, the crushing hammer is fixed in the middle of the crushing shaft group and is located inside the crushing cover, and the rotation of the crushing shaft group drives the crushing hammer to rotate, the adjusting pad and the lifting cylinder are both located outside the crushing cover and below the crushing shaft group, one end of the adjusting pad is connected to the end of the crushing shaft group and the other end is connected to one end of the lifting cylinder, the other end of the lifting cylinder is connected to the trough body, and the lifting cylinder is perpendicular to the crushing shaft group, so that the distance between the crushing hammer and the trough body can be adjusted by adjusting the lifting cylinder, thereby adjusting the crushing particle size of the raw coal.

[0012] Preferably, the crushing device also includes a telescopic rod, a telescopic baffle, and a telescopic bottom plate. One end of the telescopic rod is connected to the trough body and the other end is connected to the telescopic baffle. The telescopic baffle is vertically arranged on the telescopic bottom plate. One end of the telescopic bottom plate is connected to one end of the trough body. The telescopic rod is extended and retracted to drive the telescopic bottom plate to extend or shorten.

[0013] Preferably, the crushing device also includes a head pressure block and a tail pressure block. The head pressure block is connected to the telescopic baffle and is located at one end of the telescopic bottom plate and is arranged away from the trough body. The tail pressure block is connected to the other end of the trough body and is arranged away from the telescopic bottom plate. The scraper chain assembly includes a head sprocket shaft group, a tail sprocket shaft group, a scraper, and a chain. The output end of the scraper chain power unit is fixedly connected to the head sprocket shaft group or the tail sprocket shaft group. The head sprocket shaft group is rotatably connected to the head pressure block, and the tail sprocket shaft group is rotatably connected to the tail pressure block. The chain bypasses the head sprocket shaft group and the tail sprocket shaft group to form a closed loop. A predetermined number of scrapers are provided and are evenly distributed on the chain. The scraper and chain are both located above the trough body and the telescopic bottom plate to drive the raw coal on the trough body and the telescopic bottom plate to move.

[0014] Preferably, the top of the tank is closed and the bottom is open.

[0015] The present invention adopts the above technical solution, and its beneficial effect is that: the crushing device has its own transfer mechanism, and the raw coal is transferred and crushed by the crushing device itself, so that the crushing device does not need to be located directly above the transfer machine, so that the scraper chain of the transfer machine does not need to pass horizontally directly below the screening device. The screening device is directly arranged directly above the tail of the belt conveyor. The small pieces of raw coal after screening directly pass through the screening device vertically and fall on the tail of the belt conveyor for transportation, and do not need to pass through the transfer machine vertically again, so that the scraper of the transfer machine cannot touch the small pieces of raw coal after screening at all, and the small pieces of raw coal will not be sheared and crushed for the second time. While having the screening function, it can also relatively improve the lump coal rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the chute roller screening, crushing and transfer device coordinated with the transfer machine head and belt conveyor tail.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure from another angle.

[0018] Figure 3 for Figure 1 A schematic diagram of the structure from another angle.

[0019] Figure 4 It is a structural diagram of the coordination between the screening device, the inlet guide plate and the transfer machine trolley.

[0020] Figure 5 It is a schematic diagram of the structure of the screening device excluding the baffle and protective side plates.

[0021] Figure 6 Schematic diagram of the structure of the crushing device.

[0022] Figure: chute roller type screening, crushing and transporting device 10, screening device 11, driver 1101, roller 1102, screen 1103, support frame 1104, baffle 1105, push telescopic rod 1106, limit connecting rod 1107, outlet guide plate 1108, protective side plate 1109, buffer reinforcement plate 1110, guide inclined plate 1111, roller elastic pin gear coupling 1112, crushing device 12, head sprocket shaft assembly 12011, tail sprocket shaft assembly 12012, scraper 1201 3. Chain 12014, trough body 1202, scraper chain power unit 1203, crushing cover 12041, crushing power unit 12042, crushing shaft group 12043, adjusting pad 12044, lifting cylinder 12045, belt guard 12046, telescopic rod 1205, telescopic baffle 1206, telescopic bottom plate 1207, head pressure block 1208, tail pressure block 1209, head coal collecting plate 1210, transfer machine head 20, inlet guide plate 21, transfer machine trolley 22, belt conveyor tail 30. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Please see Figures 1 to 3 and Figure 6The embodiment of the present invention provides a trough roller 1102 type screening, crushing and transferring device 10, which is connected to the transfer machine head 20 and the belt conveyor tail 30, including a screening device 11 and a crushing device 12, both of which are located directly above the belt conveyor tail 30 and are both located at the end of the transfer machine head 20. The transfer machine head 20, the screening device 11, and the crushing device 12 are connected in sequence; the crushing device 12 includes a scraper chain assembly, a trough body 1202, and a scraper chain power unit 1203. The scraper chain assembly is located at the upper part of the trough body 1202 and is driven to move by the scraper chain power unit 1203 to drive the raw coal on the trough body 1202 to move.

[0025] Please see Figure 4 、 Figure 5 Furthermore, the screening device 11 includes a driver 1101, a roller 1102, and a screen 1103. The driving end of the driver 1101 is fixedly connected to the central axis of the roller 1102 via an elastic pin-gear coupling 1112, thereby driving the roller 1102 to rotate, thereby driving the raw coal on the roller 1102 to move. A predetermined number of rollers 1102 and screens 1103 are provided, and each roller 1102 is provided with a predetermined number of screens 1103, and each roller 1102 is connected to a driver 1101. The screens 1103 on each two adjacent rollers 1102 are staggered, so that each two adjacent screens 1103 can clean each other during rotation. The driver 1101 is a reduction motor.

[0026] Please see Figure 4 、 Figure 5 Furthermore, the screening device 11 also includes a support frame 1104 and a baffle 1105. The driver 1101 is fixed on the support frame 1104. The roller 1102 is rotatably connected to the baffle 1105. There are two baffles 1105, which are vertically arranged on opposite sides of the support frame 1104. The support frame 1104 and the trough body 1202 are both connected to the tail of the belt conveyor 30, so that the support frame 1104 and the trough body 1202 can move along the length direction of the tail of the belt conveyor 30, thereby enabling the screening device 11 and the crushing device 12 to move along the length direction of the tail of the belt conveyor 30. The support frame 1104 is a frame with a hollow bottom.

[0027] Please see Figure 4Furthermore, the transfer machine head 20 includes an entrance guide plate 21 and a transfer machine trolley 22, and the entrance guide plate 21 is arranged near the roller 1102; the screening device 11 also includes a push-telescopic rod 1106, one end of the push-telescopic rod 1106 is connected to the support frame 1104, and the other end is connected to the transfer machine trolley 22, so as to extend the push-telescopic rod 1106 to drive the support frame 1104 to move in the direction away from the transfer machine trolley 22, and shorten the push-telescopic rod 1106 to drive the support frame 1104 to move in the direction close to the transfer machine trolley 22, thereby realizing the extension of the push-telescopic rod 1106 to drive the screening device 11 and the crushing device 12 to move in the direction away from the transfer machine trolley 22, and shorten the push-telescopic rod 1106 to drive the screening device 11 and the crushing device 12 to move in the direction close to the transfer machine trolley 22. The telescopic travel of the push-and-pull rod 1106 is greater than the telescopic travel of the transfer machine head 20 itself. When the screening device 11 needs maintenance or malfunctions, the screening device 11 is pushed away from the unloading point of the transfer machine head 20, allowing the raw coal guide inclined plate 1111 to drop directly onto the belt conveyor tail 30. The raw coal is transported directly through the belt conveyor tail 30 without passing through the screening device 11, ensuring production progress. The push-and-pull rod 1106 is a hydraulic cylinder. A limit link 1107 is also provided between the support frame 1104 and the transfer machine trolley 22. The telescopic rod 1106 is mechanically limited by the limit link 1107.

[0028] Please see Figure 4 、 Figure 5 Furthermore, the screening device 11 also includes an outlet guide plate 1108, a protective side plate 1109, a buffer reinforcement plate 1110, and a guide inclined plate 1111. The outlet guide plate 1108 is located between the roller 1102 and the crushing device 12, and is arranged close to the roller 1102. The opposite ends of the outlet guide plate 1108 are respectively fixedly connected to the two baffles 1105. The protective side plate 1109 is located between the baffle 1105 and the crushing device 12, and one end of the protective side plate 1109 is connected to the baffle 1105. The buffer reinforcement plate 1110 is located directly below the roller 1102, and the buffer reinforcement plate 1110 is fixed on the support frame 1104. The guide inclined plate 1111 is horizontally located between the roller 1102 and the transfer machine trolley 22 and longitudinally located above the buffer reinforcement plate 1110, and the guide inclined plate 1111 is connected to the support frame 1104. The protective side plates 1109 are two oppositely arranged. The inclination angle of the material guide inclined plate 1111 is 35 degrees.

[0029] Please see Figure 6Furthermore, the crushing device 12 also includes a crushing assembly, which is fixed on the trough body 1202. The crushing assembly includes a crushing cover 12041, a crushing power unit 12042, a transmission belt, a crushing shaft group 12043, a crushing hammer, an adjustment pad 12044, and a lifting cylinder 12045. The crushing cover 12041 is located above the trough body 1202 and is fixed on the trough body 1202. The output end of the crushing power unit 12042 is fixedly connected to the transmission belt, and the transmission belt is fixedly connected to the crushing shaft group 12043 to drive the crushing shaft group 12043 to rotate through the crushing power unit 12042. The two ends of the crushing shaft group 12043 are located outside the crushing cover 12041, and the middle part is located inside the crushing cover 12041. The breaker hammer is fixed in the middle of the crushing shaft assembly 12043 and located inside the crushing cover 12041. Rotation of the crushing shaft assembly 12043 drives the breaker hammer to rotate. The adjustment pad 12044 and the lifting cylinder 12045 are both located outside the crushing cover 12041 and below the crushing shaft assembly 12043. One end of the adjustment pad 12044 is connected to the end of the crushing shaft assembly 12043, and the other end is connected to one end of the lifting cylinder 12045. The other end of the lifting cylinder 12045 is connected to the trough 1202. The lifting cylinder 12045 is perpendicular to the crushing shaft assembly 12043. By adjusting the lifting cylinder 12045, the distance between the breaker hammer and the trough 1202 can be adjusted, thereby adjusting the crushing particle size of the raw coal. The drive belt is provided with a belt guard 12046, which is fixed to the crushing cover 12041.

[0030] Please see Figure 6 Furthermore, the crushing device 12 also includes a telescopic rod 1205, a telescopic baffle 1206, and a telescopic base 1207. One end of the telescopic rod 1205 is connected to the trough 1202, and the other end is connected to the telescopic baffle 1206. The telescopic baffle 1206 is vertically arranged on the telescopic base 1207. One end of the telescopic base 1207 is connected to one end of the trough 1202. The telescopic rod 1205 is extended or retracted to drive the telescopic base 1207 to extend or retract. The telescopic rod 1205 is a cylinder.

[0031] Please see Figure 6Furthermore, the crushing device 12 also includes a head pressure block 1208 and a tail pressure block 1209. The head pressure block 1208 is connected to the telescopic baffle 1206 and is located at one end of the telescopic bottom plate 1207, away from the trough body 1202. The tail pressure block 1209 is connected to the other end of the trough body 1202 and is away from the telescopic bottom plate 1207. The scraper chain assembly includes a head sprocket shaft group 12011, a tail sprocket shaft group 12012, a scraper 12013, and a chain 12014. The output end of the scraper chain power unit 1203 is connected to the head sprocket shaft group 12011 or the tail The sprocket shaft assembly 12012 is fixedly connected, the head sprocket shaft assembly 12011 is rotatably connected to the head pressure block 1208, and the tail sprocket shaft assembly 12012 is rotatably connected to the tail pressure block 1209. The chain 12014 passes through the head sprocket shaft assembly 12011 and the tail sprocket shaft assembly 12012 to form a closed loop. A predetermined number of scrapers 12013 are provided and are evenly distributed on the chain 12014. The scrapers 12013 and the chain 12014 are both located above the trough body 1202 and the telescopic bottom plate 1207 to drive the raw coal on the trough body 1202 and the telescopic bottom plate 1207 to move. A chain derailleur is provided at the connection between the chain 12014 and the head sprocket shaft assembly 12011 and the tail sprocket shaft assembly 12012.

[0032] Please see Figure 6 Furthermore, the crushing device 12 also includes a head coal collecting plate 1210, which is arranged close to the head sprocket shaft group 12011 and fixedly connected to the telescopic baffle 1206.

[0033] Furthermore, the bottom of the trough body 1202 is open, so that the scraper 12013 does not pull back the coal during the closed-loop movement. The top of the trough body 1202 is closed to enhance its own strength. A middle plate is provided on the trough body 1202, and the scraper 12013 and the chain 12014 rotate around the middle plate to form a closed loop.

[0034] Furthermore, the support frame 1104 is composed of two vertical plates and three flat plates. The distance between the two vertical plates decreases from top to bottom. The three flat plates are parallel to each other. The opposite ends of the flat plates are fixedly connected to the two vertical plates respectively. The distance between each two flat plates is greater than the maximum distance between each two screen plates 1103, so that small pieces of raw coal passing through the roller 1102 can pass between each two flat plates and fall onto the tail 30 of the belt conveyor.

[0035] Furthermore, guide rails are provided on opposite sides of the belt conveyor tail 30, and pulleys are provided at the bottom of the support frame 1104 and the bottom of the trough body 1202. The pulleys are connected to the guide rails in a rolling manner, and the connection between the support frame 1104 and the belt conveyor tail 30, and the trough body 1202 and the belt conveyor tail 30 is achieved through the relative rolling of the pulleys and the guide rails.

[0036] Furthermore, the screening device 11 and the crushing device 12 are hinged by a pin. The screening device 11 and the crushing device 12 have their own transfer mechanism, and the function of screening first and then crushing can be achieved without increasing the length of the transfer machine head 20.

[0037] When this device is used, the driver 1101, the scraper chain power unit 1203, and the crushing power unit 12042 are started, and the raw coal is transferred from the inlet guide plate 21 to the roller 1102 and the screen 1103 by the transfer machine head 20. The rotation of the roller 1102 drives the raw coal to move along the tangential direction of the rotation of the roller 1102. Small pieces of raw coal pass through the gap between each two screens 1103 and fall onto the tail of the belt conveyor 30 for transportation. The large pieces of raw coal are driven by the roller 1102 to move to the trough body 1202 close to the head sprocket shaft group 12011, and are driven by the scraper 12013 and the chain 12014 to move toward the direction of the breaker. The large pieces of raw coal are crushed by the breaker, and then driven by the scraper 12013 and the chain 12014 to move toward the direction of the tail sprocket shaft group 12012 until they fall from the edge of the telescopic bottom plate 1207 to the tail of the belt conveyor 30 for transportation.

[0038] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A chute roller type screening, crushing and transporting device connected to the head of the transfer machine and the tail of the belt conveyor, characterized by: It includes a screening device and a crushing device, both of which are located just above the tail of the belt conveyor and at the end of the transfer machine head. The transfer machine head, screening device and crushing device are connected in sequence; the crushing device includes a scraper chain assembly, a trough body, a scraper chain power unit and a crushing assembly. The scraper chain assembly is located on the upper part of the trough body and is driven to move by the scraper chain power unit to drive the raw coal on the trough body to move. The crushing assembly includes a crushing cover, a crushing power unit, a transmission belt, a crushing hammer, an adjusting pad, a lifting cylinder and a crushing shaft group. The crushing cover is located above the trough body and fixed on the trough body. The output end of the crushing power unit is fixedly connected to the transmission belt, and the transmission belt is connected to the The crushing shaft group is fixedly connected to drive the crushing shaft group to rotate through the crushing power unit. The two ends of the crushing shaft group are located outside the crushing cover and the middle part is located inside the crushing cover. The breaker hammer is fixed in the middle of the crushing shaft group and is located inside the crushing cover. The rotation of the crushing shaft group drives the crushing hammer to rotate. The adjusting pad and the lifting cylinder are both located outside the crushing cover and below the crushing shaft group. One end of the adjusting pad is connected to the end of the crushing shaft group and the other end is connected to one end of the lifting cylinder. The other end of the lifting cylinder is connected to the trough body. The lifting cylinder is perpendicular to the crushing shaft group. The distance between the breaker hammer and the trough body can be adjusted by adjusting the lifting cylinder, thereby adjusting the crushing of the raw coal. Particle size; The screening device includes a driver, a roller, a screen, a support frame, a baffle, a push telescopic rod, an outlet guide plate, a protective side plate, a buffer reinforcement plate and a guide inclined plate. The driving end of the driver is fixedly connected to the central axis of the roller to drive the roller to rotate, thereby driving the raw coal on the roller to move. The roller and the screen are provided with a predetermined number, and each roller is provided with a predetermined number of screens. The driver is fixed to the support frame, and the roller is rotatably connected to the baffle. There are two baffles, which are vertically arranged on opposite sides of the support frame. The support frame and the trough body are connected to the tail of the belt conveyor so that the support frame and the trough body can move along the length direction of the tail of the belt conveyor. Thereby, both the screening device and the crushing device can be moved along the length direction of the tail of the belt conveyor; the transfer machine head includes an inlet guide plate and a transfer machine trolley, the inlet guide plate is arranged near the roller, one end of the push-telescopic rod is connected to the support frame, and the other end is connected to the transfer machine trolley, so that the push-telescopic rod is extended to drive the support frame to move in the direction away from the transfer machine trolley, and the push-telescopic rod is shortened to drive the support frame to move in the direction close to the transfer machine trolley, thereby realizing that the push-telescopic rod is extended to drive the screening device and the crushing device to move in the direction away from the transfer machine trolley, and the push-telescopic rod is shortened to drive the screening device and the crushing device to move in the direction close to the transfer machine trolley;The outlet guide plate is located between the roller and the crushing device and is positioned close to the roller. The opposite ends of the outlet guide plate are fixedly connected to the two baffles. The protective side plate is located between the baffle and the crushing device, and one end of the protective side plate is connected to the baffle. The buffer reinforcement plate is located directly below the roller and is fixed to the support frame. The guide ramp is located horizontally between the roller and the transfer machine trolley and vertically above the buffer reinforcement plate. The guide ramp is connected to the support frame. When the screening device needs maintenance or malfunctions, the screening device is pushed away from the unloading point of the transfer machine head, allowing the guide ramp to fall directly onto the tail of the belt conveyor and be transported directly through the tail of the belt conveyor without passing through the screening device.

2. The chute roller type screening, crushing and transporting device according to claim 1, characterized in that: The crushing device also includes a telescopic rod, a telescopic baffle, and a telescopic bottom plate. One end of the telescopic rod is connected to the trough body, and the other end is connected to the telescopic baffle. The telescopic baffle is vertically arranged on the telescopic bottom plate, and one end of the telescopic bottom plate is connected to one end of the trough body. The telescopic rod is extended and retracted to drive the telescopic bottom plate to extend or shorten.

3. The chute roller type screening, crushing and transporting device according to claim 2, characterized in that: The crushing device also includes a head pressure block and a tail pressure block. The head pressure block is connected to the telescopic baffle and is located at one end of the telescopic bottom plate and is arranged away from the trough body. The tail pressure block is connected to the other end of the trough body and is arranged away from the telescopic bottom plate. The scraper chain assembly includes a head sprocket shaft group, a tail sprocket shaft group, a scraper, and a chain. The output end of the scraper chain power unit is fixedly connected to the head sprocket shaft group or the tail sprocket shaft group. The head sprocket shaft group is rotatably connected to the head pressure block, and the tail sprocket shaft group is rotatably connected to the tail pressure block. The chain bypasses the head sprocket shaft group and the tail sprocket shaft group to form a closed loop. A predetermined number of scrapers are provided and are evenly distributed on the chain. The scraper and chain are both located above the trough body and the telescopic bottom plate to drive the raw coal on the trough body and the telescopic bottom plate to move.

4. The chute roller type screening, crushing and transporting device according to claim 3, characterized in that: The top of the tank is closed and the bottom is open.

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