Compact chute transfer system

Abstract

A compact chute transfer and reassignment system comprises a transfer transfer machine, a chute transfer machine, a screening transfer machine, a screening crusher, a first connecting member, a second connecting member, a screening belt conveyor and a supporting member. The transfer transfer machine comprises a landing section and a bridge section, and the landing section is horizontally arranged. The present invention adds a transfer transfer machine. The height of the transfer transfer machine is greatly reduced compared with the belt conveyor, which reduces the design height of the chute tunnel of the working face and reduces the tunnel excavation cost. The chute transfer machine, the screening transfer machine and the screening crusher can be movably installed on the transfer transfer machine, and the screening transfer machine and the screening crusher are connected to the screening belt conveyor through the transfer transfer machine. The self-moving tail of the screening belt conveyor is the same as the self-moving tail of an ordinary belt conveyor. The screening transfer machine and the screening crusher can be removed near the working face stop mining line, and then the chute transfer machine is connected to the self-moving tail of the screening belt conveyor, which reduces the length of the overall system and avoids the problem of the stop mining line extending forward due to the length of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining and conveying devices, and in particular to a compact connecting and transferring system for a chute. Background Art

[0002] The general purpose of the connecting and transferring system for the chute is to realize the screening function of coal before passing through the crusher, so as to avoid the problem that the lump coal rate is greatly reduced after all the coal passes through the crusher. The traditional connecting and transferring system for the chute is generally composed of a screening chute transfer machine, a screening transfer machine, a screening crusher and a screening belt self-moving machine tail. The belt self-moving machine tail is high and long, so the height of the entire system is high, which requires the coal mine to increase the tunnel height when designing the chute tunnel, increasing the tunnel excavation cost. At the same time, the particularity of the belt self-moving machine tail causes the entire connecting and transferring system to be longer, which extends the stop mining line of the working face forward and reduces the recovery rate of the coalfield. Summary of the invention

[0003] In view of this, in order to address the above-mentioned shortcomings, it is necessary to propose a compact chute connection and transfer system that can reduce the height and length of the entire system.

[0004] A compact chute transfer system comprises a transfer transfer machine, a chute transfer machine, a screening transfer machine, a screening crusher, a first connecting member, a second connecting member, a screening belt conveyor, and a supporting member. The transfer transfer machine comprises a landing section and a bridge section. The landing section is horizontally arranged. The chute transfer machine, the screening transfer machine, and the screening crusher are fixedly arranged directly above the landing section of the transfer transfer machine. The first connecting member comprises a first trolley and a first sliding frame. The second connecting member comprises a second trolley and a second sliding frame. The first trolley is installed at the bottom of the chute transfer machine. The first sliding frame is installed at the upper part of the landing section of the transfer transfer machine. The first sliding frame is rollingly connected to the transfer transfer machine. The first trolley is installed on the first sliding frame. The first trolley is rollingly connected to the first sliding frame. The second trolley is installed at the bottom of the screening crusher. The second sliding frame is installed at the upper part of the landing section of the transfer transfer machine. The second sliding frame is rollingly connected to the transfer transfer machine. The second trolley is installed on the second sliding frame. The second trolley is rollingly connected to the second sliding frame, and the output end of the chute transfer machine is connected to the input end of the screening transfer machine. The screening transfer machine is used to separate a mixture of large-block screening materials and small-block screening materials. The screening transfer machine includes a first output end and a second output end. The first output end of the screening transfer machine is directly opposite to the landing section of the transfer transfer machine below, so that the separated small-block screening materials fall into the landing section of the transfer transfer machine. The second output end of the screening transfer machine is connected to the input end of the screening crusher to input the separated large-block screening materials into the screening crusher. The screening crusher is used to crush the large-block screening materials. The output end of the screening crusher is directly opposite to the landing section of the transfer transfer machine below, so that the crushed large-block screening materials fall into the landing section of the transfer transfer machine. The bridge section of the transfer transfer machine is upturned and connected to the self-moving tail of the screening belt conveyor through a support member. The support member is movably connected to the bridge section of the transfer transfer machine, and the support member is movably connected to the screening belt conveyor.

[0005] Preferably, the screening transfer machine includes a fuselage, a scraper chain and a scraper installed on the scraper chain are installed in the fuselage, the fuselage includes a head, a first middle slot, a second middle slot, a third middle slot and a tail, the head, the third middle slot, the first middle slot, the second middle slot and the tail are connected end to end from left to right, the first middle slot is used to separate large pieces of screened materials from small pieces of screened materials, the third middle slot is used to transport the large pieces of screened materials screened by the first middle slot out of the head, the second middle slot includes a second middle plate and a second bottom plate, the second middle plate is located above the second bottom plate, the second middle plate includes a left plate and a right plate, the left plate and the right plate have the same horizontal height, the opposite sides of the left plate and the right plate do not touch, so that the second middle plate above The mixture of large and small screened materials falling from the output end of the chute transfer machine passes through the second middle plate and falls on the second bottom plate. The first middle trough includes the first middle plate and the first bottom plate. The first middle plate is located above the first bottom plate. The first middle plate and the second middle plate support the upper chain of the scraper chain. The first bottom plate and the second bottom plate support the lower chain of the scraper chain. The upper chain of the scraper chain and the lower chain of the scraper chain run in opposite directions. A plurality of screening holes are provided on the working surface of the first bottom plate to allow small screened materials to pass through the screening holes and fall from the first bottom plate to the landing section of the transfer transfer machine. The screening holes are arranged along the length direction of the first bottom plate, and the apertures of the plurality of screening holes gradually increase along the moving direction of the lower chain of the scraper chain.

[0006] Preferably, the screening transfer machine also includes a material receiving device, a material inlet is provided on the top of the material receiving device, the material inlet provided on the top of the material receiving device is connected to the output end of the chute transfer machine, the inner bottom wall of the material receiving device is inclined downward from right to left, and a material discharge port is provided at the left end of the inner bottom wall of the material receiving device, the material discharge port of the material receiving device is located above the center of the second middle plate of the second middle trough, so that a mixture of large pieces of screened material and small pieces of screened material falls from the material discharge port of the material receiving device, passes through the second middle plate of the second middle trough, and falls onto the second bottom plate of the second middle trough.

[0007] Preferably, the screening transfer machine also includes an unloading sliding device, a feed port is provided at the top of the unloading sliding device, the inner bottom wall of the unloading sliding device is inclined downward from right to left, and a discharge port is provided at the left end of the inner bottom wall of the unloading sliding device. The discharge port of the unloading sliding device is arranged opposite to the landing section of the transfer transfer machine, and the feed port of the unloading sliding device is located directly below the screening hole arranged on the first bottom plate of the first middle groove, so that the feed port of the unloading sliding device is connected with the screening hole.

[0008] Preferably, the screening transfer machine also includes a driving unit, which includes a driving sprocket and a driven sprocket. The driving sprocket is installed at the head of the machine, and the driven sprocket is installed at the tail of the machine. The scraper chain is wrapped around the driving sprocket and the driven sprocket. The tail of the machine is connected to the second middle groove by a telescopic cylinder, so that the horizontal distance between the tail of the machine and the second middle groove can be adjusted by the telescopic cylinder, thereby adjusting the length of the scraper chain.

[0009] Preferably, the screening transfer machine further includes a controller and a tension sensor, wherein the tension sensor is used to detect the tension of the scraper chain, the tension sensor is electrically connected to the controller, and the controller is electrically connected to the telescopic cylinder.

[0010] The present invention adds a transfer transfer machine. The height of the transfer transfer machine is greatly reduced compared with the belt conveyor, which reduces the design height of the working face chute tunnel and reduces the tunnel excavation cost. The chute transfer machine, screening transfer machine and screening crusher can be movably installed on the transfer transfer machine. The screening transfer machine and screening crusher are connected to the screening belt conveyor through the transfer transfer machine. The self-moving tail of the screening belt conveyor is the same as the self-moving tail of an ordinary belt conveyor. The screening transfer machine and screening crusher can be dismantled near the working face stop mining line, and then the chute transfer machine is connected to the self-moving tail of the screening belt conveyor, which reduces the length of the overall system and avoids the problem of the stop mining line extending forward due to the length of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the connecting and transferring system for the compact chute.

[0012] Figure 2 It is a structural schematic diagram of the screening transfer machine.

[0013] Figure 3 It is a cross-sectional view of the screening transfer machine at the second middle slot position.

[0014] Figure 4 It is a schematic diagram showing the structure of the first bottom plate of the first middle groove.

[0015] Figure 5 This is a schematic diagram of the structure of the first middle slot in the original design.

[0016] Figure 6 This is a cross-sectional view of the first middle groove along the AA direction in the original design.

[0017] In the figure: the transfer transfer machine 10, the landing section 11, the bridge section 12, the chute transfer machine 20, the screening transfer machine 30, the fuselage 31, the head 311, the first middle trough 312, the first bottom plate 3121, the screening hole 31211, the first middle plate 3122, the second middle trough 313, the second middle plate 3131, the left plate 31311, the right plate 31312, the second bottom plate 3132, the third middle trough 314, the tail 315, the material receiving device 32, the unloading sliding device 33, the screening crusher 40, the first connecting member 50, the second connecting member 60, the screening belt conveyor 70, and the supporting member 80. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces 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 creative work.

[0019] See also Figure 1The embodiment of the present invention provides a compact chute transfer system, including a transfer transfer machine 10, a chute transfer machine 20, a screening transfer machine 30, a screening crusher 40, a first connecting member 50, a second connecting member 60, a screening belt conveyor 70, and a supporting member 80. The transfer transfer machine 10 includes a landing section 11 and a bridge section 12. The landing section 11 is horizontally arranged. The chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40 are fixedly arranged just above the landing section 11 of the transfer transfer machine 10. The first connecting member 50 includes a first trolley, a first The second connecting member 60 includes a second trolley and a second sliding frame. The first trolley is installed at the bottom of the chute transfer machine 20. The first sliding frame is installed at the upper part of the landing section 11 of the transfer transfer machine 10. The first sliding frame is connected to the transfer transfer machine 10 in a rolling manner. The first trolley is installed on the first sliding frame. The first trolley is connected to the first sliding frame in a rolling manner. The second trolley is installed at the bottom of the screening crusher 40. The second sliding frame is installed at the upper part of the landing section 11 of the transfer transfer machine 10. The second sliding frame is connected to the transfer transfer machine 10 in a rolling manner. The second trolley is installed on the first sliding frame. The second trolley is connected to the second sliding frame in a rolling manner, and the output end of the chute transfer machine 20 is connected to the input end of the screening transfer machine 30. The screening transfer machine 30 is used to separate the mixture of large-block screening materials and small-block screening materials. The screening transfer machine 30 includes a first output end and a second output end. The first output end of the screening transfer machine 30 is directly facing the landing section 11 of the transfer transfer machine 10 below, so that the separated small-block screening materials fall into the landing section 11 of the transfer transfer machine 10. The second output end of the screening transfer machine 30 is connected to the input end of the screening crusher 40. The end is connected so as to input the separated large-block screened materials into the screening crusher 40, and the screening crusher 40 is used to crush the large-block screened materials. The output end of the screening crusher 40 is directly facing the landing section 11 of the transfer conveyor 10 below, so as to drop the crushed large-block screened materials into the landing section 11 of the transfer conveyor 10. The bridge section 12 of the transfer conveyor 10 is tilted upward and connected to the self-moving tail of the screening belt conveyor 70 through the support 80. The support 80 is movably connected to the bridge section 12 of the transfer conveyor 10, and the support 80 is movably connected to the screening belt conveyor 70.

[0020] Compared with the previous design, the present embodiment adds a transfer machine 10. The height of the transfer machine 10 is greatly reduced compared with the belt conveyor, thereby reducing the design height of the working face drift and tunnel, and reducing the tunnel excavation cost.

[0021] In this embodiment, the chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40 can be movably installed on the transfer transfer machine 10. The screening transfer machine 30, the screening crusher 40 are connected to the screening belt conveyor 70 through the transfer transfer machine 10. The self-moving tail of the screening belt conveyor 70 is the same as the self-moving tail of an ordinary belt conveyor. The screening transfer machine 30 and the screening crusher 40 can be removed near the stop-mining line of the working face, and then the chute transfer machine 20 can be connected to the self-moving tail of the screening belt conveyor 70, thereby reducing the length of the overall system and avoiding the problem of the stop-mining line extending forward due to the length of the equipment.

[0022] The landing section 11 of the transfer transfer machine 10 is relatively long, which meets the forward movement requirements of the connecting bodies of the chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40, and the connecting bodies of the chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40 are rollingly connected with the first sliding frame and the second sliding frame through the first trolley and the second trolley, and the first sliding frame and the second sliding frame are rollingly connected with the landing section 11 of the transfer transfer machine 10, thereby achieving the effect of large-stroke self-movement of the connecting bodies of the chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40.

[0023] The connectors of the chute transfer machine 20, the screening transfer machine 30 and the screening crusher 40 are movably connected to the landing section 11 of the transfer transfer machine 10 through the first connecting member 50 and the second connecting member 60. The bridge section 12 of the transfer transfer machine 10 is movably connected to the self-moving tail of the screening belt conveyor 70, which can meet the requirement of six or more knives on the working surface moving the belt middle frame once, thereby achieving the effect of self-moving tail of the belt with a large stroke.

[0024] The present invention adds a transfer transfer machine 10. The height of the transfer transfer machine 10 is greatly reduced compared with the belt conveyor, which reduces the design height of the working face chute tunnel and reduces the tunnel excavation cost. The chute transfer machine 20, the screening transfer machine 30, and the screening crusher 40 can be movably installed on the transfer transfer machine 10. The screening transfer machine 30 and the screening crusher 40 are connected to the screening belt conveyor 70 through the transfer transfer machine 10. The self-moving tail of the screening belt conveyor 70 is the same as the self-moving tail of an ordinary belt conveyor. The screening transfer machine 30 and the screening crusher 40 can be removed near the working face stop mining line, and then the chute transfer machine 20 is connected to the self-moving tail of the screening belt conveyor 70, which reduces the length of the overall system and avoids the problem of the stop mining line extending forward due to the length of the equipment.

[0025] See also Figures 2 to 4Further, the screening transfer machine 30 includes a body 31, a scraper chain and a scraper installed on the scraper chain are installed in the body 31, the body 31 includes a head 311, a first middle slot 312, a second middle slot 313, a third middle slot 314, and a tail 315, the head 311, the third middle slot 314, the first middle slot 312, the second middle slot 313, and the tail 315 are connected end to end from left to right, and the first middle slot 312 is used to separate large pieces of screening materials from small pieces of screening materials. The third middle slot 314 is used to transport the large pieces of screened materials screened by the first middle slot 313 out of the machine head 311. The second middle slot 313 includes a second middle plate 3131 and a second bottom plate 3132. The second middle plate 3131 is located above the second bottom plate 3132. The second middle plate 3131 includes a left plate 31311 and a right plate 31312. The left plate 31311 and the right plate 31312 have the same horizontal height, and the opposite sides of the left plate 31311 and the right plate 31312 do not touch each other. The first middle trough 312 comprises a first middle plate 3122 and a first bottom plate 3121. The first middle plate 3122 and the second middle plate 3131 are arranged above the first bottom plate 3121. The first middle plate 3122 and the second middle plate 3131 are arranged to support the upper chain of the scraper chain. The first bottom plate 3121 and the second bottom plate 3132 are arranged to support the upper chain of the scraper chain. 32 is used to support the lower chain of the scraper chain. The upper chain of the scraper chain and the lower chain of the scraper chain run in opposite directions. A plurality of screening holes 31211 are provided on the working surface of the first bottom plate 3121 to allow small pieces of screened material to pass through the screening holes 31211 and fall from the first bottom plate 3121 to the landing section 11 of the transfer transfer machine 10. The screening holes 31211 are arranged along the length direction of the first bottom plate 3121, and the apertures of the plurality of screening holes 31211 gradually increase along the moving direction of the lower chain of the scraper chain.

[0026] See also Figure 5 and Figure 6 In the original design, an upper chain conveyor is used to transport materials, that is, a mixture of large and small screened materials to be screened is transported on the first middle plate 3122, and the small screened materials fall from the sieve holes on the first middle plate 3122. The first bottom plate 3121 of the original design is open, that is, the first bottom plate 3121 in the original design is hollow. When the small screened materials fall from the sieve holes on the first middle plate 3122, they are hit by the scraper running on the first bottom plate 3121 and sheared and crushed, resulting in secondary crushing and a high particle size destruction rate of material screening.

[0027] See also Figure 2 and Figure 4In this embodiment, a lower chain is used to transport materials, that is, the second middle plate 3131 is hollow, that is, the mixture of large and small screened materials to be screened passes through the second middle plate 3131 and falls directly onto the second bottom plate 3132. The screening holes 31211 are arranged on the first bottom plate 3121. The mixture of large and small screened materials to be screened runs from the second bottom plate 3132 to the first bottom plate 3121 under the push of the scraper, and then falls from the small screened materials through the screening holes 31211 of the first bottom plate 3121. There is no scraper running under the first bottom plate 3121. In this way, when the small screened materials fall from the screening holes 31211 on the first bottom plate 3121, they will no longer be sheared and crushed by the impact of the scraper, resulting in secondary crushing, thereby effectively reducing the particle size destruction rate of material screening.

[0028] In this embodiment, the traditional design of transporting materials by the upper chain path is changed to transport by the lower chain path, that is, the second middle plate 3131 of the second middle trough 313 is open, and the material can fall directly from above the second middle trough 313 onto the second bottom plate 3132 of the second middle trough 313, and the material is transported by the lower chain path, so that the material is prevented from being sheared and crushed by the scraper when falling from the upper chain path for screening, thereby effectively reducing the particle size destruction rate of the material screening.

[0029] See also Figure 2 Furthermore, the screening transfer machine 30 also includes a material receiving device 32, a material inlet is provided at the top of the material receiving device 32, the material inlet provided at the top of the material receiving device 32 is connected to the output end of the chute transfer machine 20, the inner bottom wall of the material receiving device 32 is inclined downward from right to left, and a material discharge port is provided at the left end of the inner bottom wall of the material receiving device 32, and the material discharge port of the material receiving device 32 is located above the center of the second middle plate 3131 of the second middle groove 313, so that a mixture of large pieces of screened material and small pieces of screened material falls from the material discharge port of the material receiving device 32, passes through the second middle plate 3131 of the second middle groove 313, and falls onto the second bottom plate 3132 of the second middle groove 313.

[0030] In this embodiment, a material receiving device 32 is added to prevent the material from falling and being crushed by impact, thereby effectively reducing the particle size destruction rate of the material screening.

[0031] See also Figure 2 Furthermore, the screening transfer machine 30 also includes an unloading sliding device 33, a feeding port is provided at the top of the unloading sliding device 33, the inner bottom wall of the unloading sliding device 33 is inclined downward from right to left, and a discharge port is provided at the left end of the inner bottom wall of the unloading sliding device 33, and the discharge port of the unloading sliding device 33 is arranged opposite to the landing section 11 of the transfer transfer machine 10, and the feeding port of the unloading sliding device 33 is located directly below the screening hole 31211 set on the first bottom plate 3121 of the first middle groove 312, so that the feeding port of the unloading sliding device 33 is connected with the screening hole 31211.

[0032] In this embodiment, an unloading sliding device 33 is added to prevent the material from falling and impacting and breaking, thereby effectively reducing the particle size destruction rate of the material screening.

[0033] The above-mentioned material receiving device 32 and unloading sliding device 33 both ensure that the material drop is not greater than 1000mm, reduce the impact force of the falling material, and reduce the material breakage rate.

[0034] Furthermore, the screening transfer machine 30 also includes a driving part, which includes a driving sprocket and a driven sprocket. The driving sprocket is installed at the head 311, and the driven sprocket is installed at the tail 315. The scraper chain is wrapped around the driving sprocket and the driven sprocket. The tail 315 is connected to the second middle groove 313 through a telescopic cylinder to adjust the horizontal distance between the tail 315 and the second middle groove 313 through the telescopic cylinder, thereby adjusting the length of the scraper chain.

[0035] Furthermore, the screening transfer machine 30 also includes a controller and a tension sensor. The tension sensor is used to detect the tension of the scraper chain. The tension sensor is electrically connected to the controller, and the controller is electrically connected to the telescopic cylinder.

[0036] The modules or units in the device of the embodiment of the present invention may be combined, divided or deleted according to actual needs.

[0037] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A compact chute docking and transfer system, characterized by: It includes a transfer transfer machine, a chute transfer machine, a screening transfer machine, a screening crusher, a first connecting member, a second connecting member, a screening belt conveyor, and a supporting member. The transfer transfer machine includes a landing section and a bridge section. The landing section is horizontally arranged. The chute transfer machine, the screening transfer machine, and the screening crusher are fixedly arranged directly above the landing section of the transfer transfer machine. The first connecting member includes a first trolley and a first sliding frame. The second connecting member includes a second trolley and a second sliding frame. The first trolley is installed at the bottom of the chute transfer machine. The first sliding frame is installed at the upper part of the landing section of the transfer transfer machine. The first sliding frame is rollingly connected to the transfer transfer machine. The first trolley is installed on the first sliding frame. The first trolley is rollingly connected to the first sliding frame. The second trolley is installed at the bottom of the screening crusher. The second sliding frame is installed at the upper part of the landing section of the transfer transfer machine. The second sliding frame is rollingly connected to the transfer transfer machine. The second trolley is installed on the second sliding frame. The sliding frame is connected in a rolling manner, and the output end of the chute transfer machine is connected to the input end of the screening transfer machine. The screening transfer machine is used to separate a mixture of large-block screening materials and small-block screening materials. The screening transfer machine includes a first output end and a second output end. The first output end of the screening transfer machine is directly opposite to the landing section of the transfer transfer machine below, so that the separated small-block screening materials fall into the landing section of the transfer transfer machine. The second output end of the screening transfer machine is connected to the input end of the screening crusher to input the separated large-block screening materials into the screening crusher. The screening crusher is used to crush the large-block screening materials. The output end of the screening crusher is directly opposite to the landing section of the transfer transfer machine below, so that the crushed large-block screening materials fall into the landing section of the transfer transfer machine. The bridge section of the transfer transfer machine is upturned and connected to the self-moving tail of the screening belt conveyor through a support member. The support member is movably connected to the bridge section of the transfer transfer machine, and the support member is movably connected to the screening belt conveyor.The screening transfer machine includes a fuselage, a scraper chain and a scraper installed on the scraper chain are installed in the fuselage, the fuselage includes a head, a first middle slot, a second middle slot, a third middle slot and a tail, the head, the third middle slot, the first middle slot, the second middle slot and the tail are connected end to end from left to right, the first middle slot is used to separate large pieces of screened materials from small pieces of screened materials, the third middle slot is used to transport the large pieces of screened materials screened by the first middle slot out of the head, the second middle slot includes a second middle plate and a second bottom plate, the second middle plate is located above the second bottom plate, the second middle plate includes a left plate and a right plate, the left plate and the right plate are connected in water The left and right plates have the same level height, and the opposite sides of the left and right plates do not touch, so that a mixture of large and small screened materials falling from the output end of the chute transfer machine above the second middle plate passes through the second middle plate and falls on the second bottom plate. The first middle trough includes a first middle plate and a first bottom plate. The first middle plate is located above the first bottom plate. The first middle plate and the second middle plate are used to support the upper chain of the scraper chain. The first bottom plate and the second bottom plate are used to support the lower chain of the scraper chain. The upper chain of the scraper chain and the lower chain of the scraper chain run in opposite directions. A plurality of screening holes are provided on the working surface of the first bottom plate, so that small screened materials pass through the screening holes and fall from the first The bottom plate falls to the landing section of the transfer and transfer machine, the screening holes are arranged along the length direction of the first bottom plate, and the apertures of the multiple screening holes gradually increase along the movement direction of the lower chain of the scraper chain; the screening and transfer machine also includes a material receiving device, the top of the material receiving device is provided with a feeding port, the feeding port provided on the top of the material receiving device is connected to the output end of the chute transfer machine, the inner bottom wall of the material receiving device is inclined downward from right to left, and a discharge port is provided at the left end of the inner bottom wall of the material receiving device, and the discharge port of the material receiving device is located above the center of the second middle plate of the second middle groove, so that a mixture of large pieces of screened materials and small pieces of screened materials can fall from the discharge port of the material receiving device , and passes through the second middle plate of the second middle slot, and falls onto the second bottom plate of the second middle slot; the screening transfer machine also includes an unloading sliding device, the top of which is provided with an inlet, the inner bottom wall of the unloading sliding device is tilted downward from right to left, and the left end of the inner bottom wall of the unloading sliding device is provided with an outlet, the outlet of the unloading sliding device is arranged directly opposite to the landing section of the transfer transfer machine, and the inlet of the unloading sliding device is located directly below the screening hole arranged on the first bottom plate of the first middle slot, so that the inlet of the unloading sliding device is connected with the screening hole; the above-mentioned receiving device and unloading sliding device both ensure that the material drop is not greater than 1000mm. ; 2. The compact chute docking and transfer system according to claim 1, characterized in that: The screening transfer machine also includes a driving part, which includes a driving sprocket and a driven sprocket. The driving sprocket is installed at the head of the machine, and the driven sprocket is installed at the tail of the machine. The scraper chain is wrapped around the driving sprocket and the driven sprocket. The tail of the machine is connected to the second middle groove through a telescopic cylinder, so that the horizontal distance between the tail of the machine and the second middle groove can be adjusted by the telescopic cylinder, thereby adjusting the length of the scraper chain.

3. The compact chute docking and transfer system according to claim 1, characterized in that: The screening transfer machine also includes a controller and a tension sensor. The tension sensor is used to detect the tension of the scraper chain. The tension sensor is electrically connected to the controller, and the controller is electrically connected to the telescopic cylinder.

Images